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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Implementation of the policy database.
4 *
5 * Author : Stephen Smalley, <sds@tycho.nsa.gov>
6 */
7
8/*
9 * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
10 *
11 * Support for enhanced MLS infrastructure.
12 *
13 * Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com>
14 *
15 * Added conditional policy language extensions
16 *
17 * Updated: Hewlett-Packard <paul@paul-moore.com>
18 *
19 * Added support for the policy capability bitmap
20 *
21 * Update: Mellanox Techonologies
22 *
23 * Added Infiniband support
24 *
25 * Copyright (C) 2016 Mellanox Techonologies
26 * Copyright (C) 2007 Hewlett-Packard Development Company, L.P.
27 * Copyright (C) 2004-2005 Trusted Computer Solutions, Inc.
28 * Copyright (C) 2003 - 2004 Tresys Technology, LLC
29 */
30
31#include <linux/kernel.h>
32#include <linux/sched.h>
33#include <linux/slab.h>
34#include <linux/string.h>
35#include <linux/errno.h>
36#include <linux/audit.h>
37#include "security.h"
38
39#include "policydb.h"
40#include "conditional.h"
41#include "mls.h"
42#include "services.h"
43
44#ifdef DEBUG_HASHES
45static const char *symtab_name[SYM_NUM] = {
46 "common prefixes",
47 "classes",
48 "roles",
49 "types",
50 "users",
51 "bools",
52 "levels",
53 "categories",
54};
55#endif
56
57struct policydb_compat_info {
58 int version;
59 int sym_num;
60 int ocon_num;
61};
62
63/* These need to be updated if SYM_NUM or OCON_NUM changes */
64static const struct policydb_compat_info policydb_compat[] = {
65 {
66 .version = POLICYDB_VERSION_BASE,
67 .sym_num = SYM_NUM - 3,
68 .ocon_num = OCON_NUM - 3,
69 },
70 {
71 .version = POLICYDB_VERSION_BOOL,
72 .sym_num = SYM_NUM - 2,
73 .ocon_num = OCON_NUM - 3,
74 },
75 {
76 .version = POLICYDB_VERSION_IPV6,
77 .sym_num = SYM_NUM - 2,
78 .ocon_num = OCON_NUM - 2,
79 },
80 {
81 .version = POLICYDB_VERSION_NLCLASS,
82 .sym_num = SYM_NUM - 2,
83 .ocon_num = OCON_NUM - 2,
84 },
85 {
86 .version = POLICYDB_VERSION_MLS,
87 .sym_num = SYM_NUM,
88 .ocon_num = OCON_NUM - 2,
89 },
90 {
91 .version = POLICYDB_VERSION_AVTAB,
92 .sym_num = SYM_NUM,
93 .ocon_num = OCON_NUM - 2,
94 },
95 {
96 .version = POLICYDB_VERSION_RANGETRANS,
97 .sym_num = SYM_NUM,
98 .ocon_num = OCON_NUM - 2,
99 },
100 {
101 .version = POLICYDB_VERSION_POLCAP,
102 .sym_num = SYM_NUM,
103 .ocon_num = OCON_NUM - 2,
104 },
105 {
106 .version = POLICYDB_VERSION_PERMISSIVE,
107 .sym_num = SYM_NUM,
108 .ocon_num = OCON_NUM - 2,
109 },
110 {
111 .version = POLICYDB_VERSION_BOUNDARY,
112 .sym_num = SYM_NUM,
113 .ocon_num = OCON_NUM - 2,
114 },
115 {
116 .version = POLICYDB_VERSION_FILENAME_TRANS,
117 .sym_num = SYM_NUM,
118 .ocon_num = OCON_NUM - 2,
119 },
120 {
121 .version = POLICYDB_VERSION_ROLETRANS,
122 .sym_num = SYM_NUM,
123 .ocon_num = OCON_NUM - 2,
124 },
125 {
126 .version = POLICYDB_VERSION_NEW_OBJECT_DEFAULTS,
127 .sym_num = SYM_NUM,
128 .ocon_num = OCON_NUM - 2,
129 },
130 {
131 .version = POLICYDB_VERSION_DEFAULT_TYPE,
132 .sym_num = SYM_NUM,
133 .ocon_num = OCON_NUM - 2,
134 },
135 {
136 .version = POLICYDB_VERSION_CONSTRAINT_NAMES,
137 .sym_num = SYM_NUM,
138 .ocon_num = OCON_NUM - 2,
139 },
140 {
141 .version = POLICYDB_VERSION_XPERMS_IOCTL,
142 .sym_num = SYM_NUM,
143 .ocon_num = OCON_NUM - 2,
144 },
145 {
146 .version = POLICYDB_VERSION_INFINIBAND,
147 .sym_num = SYM_NUM,
148 .ocon_num = OCON_NUM,
149 },
150 {
151 .version = POLICYDB_VERSION_GLBLUB,
152 .sym_num = SYM_NUM,
153 .ocon_num = OCON_NUM,
154 },
155 {
156 .version = POLICYDB_VERSION_COMP_FTRANS,
157 .sym_num = SYM_NUM,
158 .ocon_num = OCON_NUM,
159 },
160};
161
162static const struct policydb_compat_info *policydb_lookup_compat(int version)
163{
164 int i;
165
166 for (i = 0; i < ARRAY_SIZE(policydb_compat); i++) {
167 if (policydb_compat[i].version == version)
168 return &policydb_compat[i];
169 }
170
171 return NULL;
172}
173
174/*
175 * The following *_destroy functions are used to
176 * free any memory allocated for each kind of
177 * symbol data in the policy database.
178 */
179
180static int perm_destroy(void *key, void *datum, void *p)
181{
182 kfree(key);
183 kfree(datum);
184 return 0;
185}
186
187static int common_destroy(void *key, void *datum, void *p)
188{
189 struct common_datum *comdatum;
190
191 kfree(key);
192 if (datum) {
193 comdatum = datum;
194 hashtab_map(&comdatum->permissions.table, perm_destroy, NULL);
195 hashtab_destroy(&comdatum->permissions.table);
196 }
197 kfree(datum);
198 return 0;
199}
200
201static void constraint_expr_destroy(struct constraint_expr *expr)
202{
203 if (expr) {
204 ebitmap_destroy(&expr->names);
205 if (expr->type_names) {
206 ebitmap_destroy(&expr->type_names->types);
207 ebitmap_destroy(&expr->type_names->negset);
208 kfree(expr->type_names);
209 }
210 kfree(expr);
211 }
212}
213
214static int cls_destroy(void *key, void *datum, void *p)
215{
216 struct class_datum *cladatum;
217 struct constraint_node *constraint, *ctemp;
218 struct constraint_expr *e, *etmp;
219
220 kfree(key);
221 if (datum) {
222 cladatum = datum;
223 hashtab_map(&cladatum->permissions.table, perm_destroy, NULL);
224 hashtab_destroy(&cladatum->permissions.table);
225 constraint = cladatum->constraints;
226 while (constraint) {
227 e = constraint->expr;
228 while (e) {
229 etmp = e;
230 e = e->next;
231 constraint_expr_destroy(etmp);
232 }
233 ctemp = constraint;
234 constraint = constraint->next;
235 kfree(ctemp);
236 }
237
238 constraint = cladatum->validatetrans;
239 while (constraint) {
240 e = constraint->expr;
241 while (e) {
242 etmp = e;
243 e = e->next;
244 constraint_expr_destroy(etmp);
245 }
246 ctemp = constraint;
247 constraint = constraint->next;
248 kfree(ctemp);
249 }
250 kfree(cladatum->comkey);
251 }
252 kfree(datum);
253 return 0;
254}
255
256static int role_destroy(void *key, void *datum, void *p)
257{
258 struct role_datum *role;
259
260 kfree(key);
261 if (datum) {
262 role = datum;
263 ebitmap_destroy(&role->dominates);
264 ebitmap_destroy(&role->types);
265 }
266 kfree(datum);
267 return 0;
268}
269
270static int type_destroy(void *key, void *datum, void *p)
271{
272 kfree(key);
273 kfree(datum);
274 return 0;
275}
276
277static int user_destroy(void *key, void *datum, void *p)
278{
279 struct user_datum *usrdatum;
280
281 kfree(key);
282 if (datum) {
283 usrdatum = datum;
284 ebitmap_destroy(&usrdatum->roles);
285 ebitmap_destroy(&usrdatum->range.level[0].cat);
286 ebitmap_destroy(&usrdatum->range.level[1].cat);
287 ebitmap_destroy(&usrdatum->dfltlevel.cat);
288 }
289 kfree(datum);
290 return 0;
291}
292
293static int sens_destroy(void *key, void *datum, void *p)
294{
295 struct level_datum *levdatum;
296
297 kfree(key);
298 if (datum) {
299 levdatum = datum;
300 if (levdatum->level)
301 ebitmap_destroy(&levdatum->level->cat);
302 kfree(levdatum->level);
303 }
304 kfree(datum);
305 return 0;
306}
307
308static int cat_destroy(void *key, void *datum, void *p)
309{
310 kfree(key);
311 kfree(datum);
312 return 0;
313}
314
315static int (*const destroy_f[SYM_NUM]) (void *key, void *datum, void *datap) = {
316 common_destroy,
317 cls_destroy,
318 role_destroy,
319 type_destroy,
320 user_destroy,
321 cond_destroy_bool,
322 sens_destroy,
323 cat_destroy,
324};
325
326static int filenametr_destroy(void *key, void *datum, void *p)
327{
328 struct filename_trans_key *ft = key;
329 struct filename_trans_datum *next, *d = datum;
330
331 kfree(ft->name);
332 kfree(key);
333 do {
334 ebitmap_destroy(&d->stypes);
335 next = d->next;
336 kfree(d);
337 d = next;
338 } while (unlikely(d));
339 cond_resched();
340 return 0;
341}
342
343static int range_tr_destroy(void *key, void *datum, void *p)
344{
345 struct mls_range *rt = datum;
346
347 kfree(key);
348 ebitmap_destroy(&rt->level[0].cat);
349 ebitmap_destroy(&rt->level[1].cat);
350 kfree(datum);
351 cond_resched();
352 return 0;
353}
354
355static int role_tr_destroy(void *key, void *datum, void *p)
356{
357 kfree(key);
358 kfree(datum);
359 return 0;
360}
361
362static void ocontext_destroy(struct ocontext *c, int i)
363{
364 if (!c)
365 return;
366
367 context_destroy(&c->context[0]);
368 context_destroy(&c->context[1]);
369 if (i == OCON_ISID || i == OCON_FS ||
370 i == OCON_NETIF || i == OCON_FSUSE)
371 kfree(c->u.name);
372 kfree(c);
373}
374
375/*
376 * Initialize the role table.
377 */
378static int roles_init(struct policydb *p)
379{
380 char *key = NULL;
381 int rc;
382 struct role_datum *role;
383
384 role = kzalloc(sizeof(*role), GFP_KERNEL);
385 if (!role)
386 return -ENOMEM;
387
388 rc = -EINVAL;
389 role->value = ++p->p_roles.nprim;
390 if (role->value != OBJECT_R_VAL)
391 goto out;
392
393 rc = -ENOMEM;
394 key = kstrdup(OBJECT_R, GFP_KERNEL);
395 if (!key)
396 goto out;
397
398 rc = symtab_insert(&p->p_roles, key, role);
399 if (rc)
400 goto out;
401
402 return 0;
403out:
404 kfree(key);
405 kfree(role);
406 return rc;
407}
408
409static u32 filenametr_hash(const void *k)
410{
411 const struct filename_trans_key *ft = k;
412 unsigned long hash;
413 unsigned int byte_num;
414 unsigned char focus;
415
416 hash = ft->ttype ^ ft->tclass;
417
418 byte_num = 0;
419 while ((focus = ft->name[byte_num++]))
420 hash = partial_name_hash(focus, hash);
421 return hash;
422}
423
424static int filenametr_cmp(const void *k1, const void *k2)
425{
426 const struct filename_trans_key *ft1 = k1;
427 const struct filename_trans_key *ft2 = k2;
428 int v;
429
430 v = ft1->ttype - ft2->ttype;
431 if (v)
432 return v;
433
434 v = ft1->tclass - ft2->tclass;
435 if (v)
436 return v;
437
438 return strcmp(ft1->name, ft2->name);
439
440}
441
442static const struct hashtab_key_params filenametr_key_params = {
443 .hash = filenametr_hash,
444 .cmp = filenametr_cmp,
445};
446
447struct filename_trans_datum *policydb_filenametr_search(
448 struct policydb *p, struct filename_trans_key *key)
449{
450 return hashtab_search(&p->filename_trans, key, filenametr_key_params);
451}
452
453static u32 rangetr_hash(const void *k)
454{
455 const struct range_trans *key = k;
456
457 return key->source_type + (key->target_type << 3) +
458 (key->target_class << 5);
459}
460
461static int rangetr_cmp(const void *k1, const void *k2)
462{
463 const struct range_trans *key1 = k1, *key2 = k2;
464 int v;
465
466 v = key1->source_type - key2->source_type;
467 if (v)
468 return v;
469
470 v = key1->target_type - key2->target_type;
471 if (v)
472 return v;
473
474 v = key1->target_class - key2->target_class;
475
476 return v;
477}
478
479static const struct hashtab_key_params rangetr_key_params = {
480 .hash = rangetr_hash,
481 .cmp = rangetr_cmp,
482};
483
484struct mls_range *policydb_rangetr_search(struct policydb *p,
485 struct range_trans *key)
486{
487 return hashtab_search(&p->range_tr, key, rangetr_key_params);
488}
489
490static u32 role_trans_hash(const void *k)
491{
492 const struct role_trans_key *key = k;
493
494 return key->role + (key->type << 3) + (key->tclass << 5);
495}
496
497static int role_trans_cmp(const void *k1, const void *k2)
498{
499 const struct role_trans_key *key1 = k1, *key2 = k2;
500 int v;
501
502 v = key1->role - key2->role;
503 if (v)
504 return v;
505
506 v = key1->type - key2->type;
507 if (v)
508 return v;
509
510 return key1->tclass - key2->tclass;
511}
512
513static const struct hashtab_key_params roletr_key_params = {
514 .hash = role_trans_hash,
515 .cmp = role_trans_cmp,
516};
517
518struct role_trans_datum *policydb_roletr_search(struct policydb *p,
519 struct role_trans_key *key)
520{
521 return hashtab_search(&p->role_tr, key, roletr_key_params);
522}
523
524/*
525 * Initialize a policy database structure.
526 */
527static void policydb_init(struct policydb *p)
528{
529 memset(p, 0, sizeof(*p));
530
531 avtab_init(&p->te_avtab);
532 cond_policydb_init(p);
533
534 ebitmap_init(&p->filename_trans_ttypes);
535 ebitmap_init(&p->policycaps);
536 ebitmap_init(&p->permissive_map);
537}
538
539/*
540 * The following *_index functions are used to
541 * define the val_to_name and val_to_struct arrays
542 * in a policy database structure. The val_to_name
543 * arrays are used when converting security context
544 * structures into string representations. The
545 * val_to_struct arrays are used when the attributes
546 * of a class, role, or user are needed.
547 */
548
549static int common_index(void *key, void *datum, void *datap)
550{
551 struct policydb *p;
552 struct common_datum *comdatum;
553
554 comdatum = datum;
555 p = datap;
556 if (!comdatum->value || comdatum->value > p->p_commons.nprim)
557 return -EINVAL;
558
559 p->sym_val_to_name[SYM_COMMONS][comdatum->value - 1] = key;
560
561 return 0;
562}
563
564static int class_index(void *key, void *datum, void *datap)
565{
566 struct policydb *p;
567 struct class_datum *cladatum;
568
569 cladatum = datum;
570 p = datap;
571 if (!cladatum->value || cladatum->value > p->p_classes.nprim)
572 return -EINVAL;
573
574 p->sym_val_to_name[SYM_CLASSES][cladatum->value - 1] = key;
575 p->class_val_to_struct[cladatum->value - 1] = cladatum;
576 return 0;
577}
578
579static int role_index(void *key, void *datum, void *datap)
580{
581 struct policydb *p;
582 struct role_datum *role;
583
584 role = datum;
585 p = datap;
586 if (!role->value
587 || role->value > p->p_roles.nprim
588 || role->bounds > p->p_roles.nprim)
589 return -EINVAL;
590
591 p->sym_val_to_name[SYM_ROLES][role->value - 1] = key;
592 p->role_val_to_struct[role->value - 1] = role;
593 return 0;
594}
595
596static int type_index(void *key, void *datum, void *datap)
597{
598 struct policydb *p;
599 struct type_datum *typdatum;
600
601 typdatum = datum;
602 p = datap;
603
604 if (typdatum->primary) {
605 if (!typdatum->value
606 || typdatum->value > p->p_types.nprim
607 || typdatum->bounds > p->p_types.nprim)
608 return -EINVAL;
609 p->sym_val_to_name[SYM_TYPES][typdatum->value - 1] = key;
610 p->type_val_to_struct[typdatum->value - 1] = typdatum;
611 }
612
613 return 0;
614}
615
616static int user_index(void *key, void *datum, void *datap)
617{
618 struct policydb *p;
619 struct user_datum *usrdatum;
620
621 usrdatum = datum;
622 p = datap;
623 if (!usrdatum->value
624 || usrdatum->value > p->p_users.nprim
625 || usrdatum->bounds > p->p_users.nprim)
626 return -EINVAL;
627
628 p->sym_val_to_name[SYM_USERS][usrdatum->value - 1] = key;
629 p->user_val_to_struct[usrdatum->value - 1] = usrdatum;
630 return 0;
631}
632
633static int sens_index(void *key, void *datum, void *datap)
634{
635 struct policydb *p;
636 struct level_datum *levdatum;
637
638 levdatum = datum;
639 p = datap;
640
641 if (!levdatum->isalias) {
642 if (!levdatum->level->sens ||
643 levdatum->level->sens > p->p_levels.nprim)
644 return -EINVAL;
645
646 p->sym_val_to_name[SYM_LEVELS][levdatum->level->sens - 1] = key;
647 }
648
649 return 0;
650}
651
652static int cat_index(void *key, void *datum, void *datap)
653{
654 struct policydb *p;
655 struct cat_datum *catdatum;
656
657 catdatum = datum;
658 p = datap;
659
660 if (!catdatum->isalias) {
661 if (!catdatum->value || catdatum->value > p->p_cats.nprim)
662 return -EINVAL;
663
664 p->sym_val_to_name[SYM_CATS][catdatum->value - 1] = key;
665 }
666
667 return 0;
668}
669
670static int (*const index_f[SYM_NUM]) (void *key, void *datum, void *datap) = {
671 common_index,
672 class_index,
673 role_index,
674 type_index,
675 user_index,
676 cond_index_bool,
677 sens_index,
678 cat_index,
679};
680
681#ifdef DEBUG_HASHES
682static void hash_eval(struct hashtab *h, const char *hash_name)
683{
684 struct hashtab_info info;
685
686 hashtab_stat(h, &info);
687 pr_debug("SELinux: %s: %d entries and %d/%d buckets used, longest chain length %d\n",
688 hash_name, h->nel, info.slots_used, h->size,
689 info.max_chain_len);
690}
691
692static void symtab_hash_eval(struct symtab *s)
693{
694 int i;
695
696 for (i = 0; i < SYM_NUM; i++)
697 hash_eval(&s[i].table, symtab_name[i]);
698}
699
700#else
701static inline void hash_eval(struct hashtab *h, const char *hash_name)
702{
703}
704#endif
705
706/*
707 * Define the other val_to_name and val_to_struct arrays
708 * in a policy database structure.
709 *
710 * Caller must clean up on failure.
711 */
712static int policydb_index(struct policydb *p)
713{
714 int i, rc;
715
716 if (p->mls_enabled)
717 pr_debug("SELinux: %d users, %d roles, %d types, %d bools, %d sens, %d cats\n",
718 p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim,
719 p->p_bools.nprim, p->p_levels.nprim, p->p_cats.nprim);
720 else
721 pr_debug("SELinux: %d users, %d roles, %d types, %d bools\n",
722 p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim,
723 p->p_bools.nprim);
724
725 pr_debug("SELinux: %d classes, %d rules\n",
726 p->p_classes.nprim, p->te_avtab.nel);
727
728#ifdef DEBUG_HASHES
729 avtab_hash_eval(&p->te_avtab, "rules");
730 symtab_hash_eval(p->symtab);
731#endif
732
733 p->class_val_to_struct = kcalloc(p->p_classes.nprim,
734 sizeof(*p->class_val_to_struct),
735 GFP_KERNEL);
736 if (!p->class_val_to_struct)
737 return -ENOMEM;
738
739 p->role_val_to_struct = kcalloc(p->p_roles.nprim,
740 sizeof(*p->role_val_to_struct),
741 GFP_KERNEL);
742 if (!p->role_val_to_struct)
743 return -ENOMEM;
744
745 p->user_val_to_struct = kcalloc(p->p_users.nprim,
746 sizeof(*p->user_val_to_struct),
747 GFP_KERNEL);
748 if (!p->user_val_to_struct)
749 return -ENOMEM;
750
751 p->type_val_to_struct = kvcalloc(p->p_types.nprim,
752 sizeof(*p->type_val_to_struct),
753 GFP_KERNEL);
754 if (!p->type_val_to_struct)
755 return -ENOMEM;
756
757 rc = cond_init_bool_indexes(p);
758 if (rc)
759 goto out;
760
761 for (i = 0; i < SYM_NUM; i++) {
762 p->sym_val_to_name[i] = kvcalloc(p->symtab[i].nprim,
763 sizeof(char *),
764 GFP_KERNEL);
765 if (!p->sym_val_to_name[i])
766 return -ENOMEM;
767
768 rc = hashtab_map(&p->symtab[i].table, index_f[i], p);
769 if (rc)
770 goto out;
771 }
772 rc = 0;
773out:
774 return rc;
775}
776
777/*
778 * Free any memory allocated by a policy database structure.
779 */
780void policydb_destroy(struct policydb *p)
781{
782 struct ocontext *c, *ctmp;
783 struct genfs *g, *gtmp;
784 int i;
785 struct role_allow *ra, *lra = NULL;
786
787 for (i = 0; i < SYM_NUM; i++) {
788 cond_resched();
789 hashtab_map(&p->symtab[i].table, destroy_f[i], NULL);
790 hashtab_destroy(&p->symtab[i].table);
791 }
792
793 for (i = 0; i < SYM_NUM; i++)
794 kvfree(p->sym_val_to_name[i]);
795
796 kfree(p->class_val_to_struct);
797 kfree(p->role_val_to_struct);
798 kfree(p->user_val_to_struct);
799 kvfree(p->type_val_to_struct);
800
801 avtab_destroy(&p->te_avtab);
802
803 for (i = 0; i < OCON_NUM; i++) {
804 cond_resched();
805 c = p->ocontexts[i];
806 while (c) {
807 ctmp = c;
808 c = c->next;
809 ocontext_destroy(ctmp, i);
810 }
811 p->ocontexts[i] = NULL;
812 }
813
814 g = p->genfs;
815 while (g) {
816 cond_resched();
817 kfree(g->fstype);
818 c = g->head;
819 while (c) {
820 ctmp = c;
821 c = c->next;
822 ocontext_destroy(ctmp, OCON_FSUSE);
823 }
824 gtmp = g;
825 g = g->next;
826 kfree(gtmp);
827 }
828 p->genfs = NULL;
829
830 cond_policydb_destroy(p);
831
832 hashtab_map(&p->role_tr, role_tr_destroy, NULL);
833 hashtab_destroy(&p->role_tr);
834
835 for (ra = p->role_allow; ra; ra = ra->next) {
836 cond_resched();
837 kfree(lra);
838 lra = ra;
839 }
840 kfree(lra);
841
842 hashtab_map(&p->filename_trans, filenametr_destroy, NULL);
843 hashtab_destroy(&p->filename_trans);
844
845 hashtab_map(&p->range_tr, range_tr_destroy, NULL);
846 hashtab_destroy(&p->range_tr);
847
848 if (p->type_attr_map_array) {
849 for (i = 0; i < p->p_types.nprim; i++)
850 ebitmap_destroy(&p->type_attr_map_array[i]);
851 kvfree(p->type_attr_map_array);
852 }
853
854 ebitmap_destroy(&p->filename_trans_ttypes);
855 ebitmap_destroy(&p->policycaps);
856 ebitmap_destroy(&p->permissive_map);
857}
858
859/*
860 * Load the initial SIDs specified in a policy database
861 * structure into a SID table.
862 */
863int policydb_load_isids(struct policydb *p, struct sidtab *s)
864{
865 struct ocontext *head, *c;
866 int rc;
867
868 rc = sidtab_init(s);
869 if (rc) {
870 pr_err("SELinux: out of memory on SID table init\n");
871 return rc;
872 }
873
874 head = p->ocontexts[OCON_ISID];
875 for (c = head; c; c = c->next) {
876 u32 sid = c->sid[0];
877 const char *name = security_get_initial_sid_context(sid);
878
879 if (sid == SECSID_NULL) {
880 pr_err("SELinux: SID 0 was assigned a context.\n");
881 sidtab_destroy(s);
882 return -EINVAL;
883 }
884
885 /* Ignore initial SIDs unused by this kernel. */
886 if (!name)
887 continue;
888
889 rc = sidtab_set_initial(s, sid, &c->context[0]);
890 if (rc) {
891 pr_err("SELinux: unable to load initial SID %s.\n",
892 name);
893 sidtab_destroy(s);
894 return rc;
895 }
896 }
897 return 0;
898}
899
900int policydb_class_isvalid(struct policydb *p, unsigned int class)
901{
902 if (!class || class > p->p_classes.nprim)
903 return 0;
904 return 1;
905}
906
907int policydb_role_isvalid(struct policydb *p, unsigned int role)
908{
909 if (!role || role > p->p_roles.nprim)
910 return 0;
911 return 1;
912}
913
914int policydb_type_isvalid(struct policydb *p, unsigned int type)
915{
916 if (!type || type > p->p_types.nprim)
917 return 0;
918 return 1;
919}
920
921/*
922 * Return 1 if the fields in the security context
923 * structure `c' are valid. Return 0 otherwise.
924 */
925int policydb_context_isvalid(struct policydb *p, struct context *c)
926{
927 struct role_datum *role;
928 struct user_datum *usrdatum;
929
930 if (!c->role || c->role > p->p_roles.nprim)
931 return 0;
932
933 if (!c->user || c->user > p->p_users.nprim)
934 return 0;
935
936 if (!c->type || c->type > p->p_types.nprim)
937 return 0;
938
939 if (c->role != OBJECT_R_VAL) {
940 /*
941 * Role must be authorized for the type.
942 */
943 role = p->role_val_to_struct[c->role - 1];
944 if (!role || !ebitmap_get_bit(&role->types, c->type - 1))
945 /* role may not be associated with type */
946 return 0;
947
948 /*
949 * User must be authorized for the role.
950 */
951 usrdatum = p->user_val_to_struct[c->user - 1];
952 if (!usrdatum)
953 return 0;
954
955 if (!ebitmap_get_bit(&usrdatum->roles, c->role - 1))
956 /* user may not be associated with role */
957 return 0;
958 }
959
960 if (!mls_context_isvalid(p, c))
961 return 0;
962
963 return 1;
964}
965
966/*
967 * Read a MLS range structure from a policydb binary
968 * representation file.
969 */
970static int mls_read_range_helper(struct mls_range *r, void *fp)
971{
972 __le32 buf[2];
973 u32 items;
974 int rc;
975
976 rc = next_entry(buf, fp, sizeof(u32));
977 if (rc)
978 goto out;
979
980 rc = -EINVAL;
981 items = le32_to_cpu(buf[0]);
982 if (items > ARRAY_SIZE(buf)) {
983 pr_err("SELinux: mls: range overflow\n");
984 goto out;
985 }
986
987 rc = next_entry(buf, fp, sizeof(u32) * items);
988 if (rc) {
989 pr_err("SELinux: mls: truncated range\n");
990 goto out;
991 }
992
993 r->level[0].sens = le32_to_cpu(buf[0]);
994 if (items > 1)
995 r->level[1].sens = le32_to_cpu(buf[1]);
996 else
997 r->level[1].sens = r->level[0].sens;
998
999 rc = ebitmap_read(&r->level[0].cat, fp);
1000 if (rc) {
1001 pr_err("SELinux: mls: error reading low categories\n");
1002 goto out;
1003 }
1004 if (items > 1) {
1005 rc = ebitmap_read(&r->level[1].cat, fp);
1006 if (rc) {
1007 pr_err("SELinux: mls: error reading high categories\n");
1008 goto bad_high;
1009 }
1010 } else {
1011 rc = ebitmap_cpy(&r->level[1].cat, &r->level[0].cat);
1012 if (rc) {
1013 pr_err("SELinux: mls: out of memory\n");
1014 goto bad_high;
1015 }
1016 }
1017
1018 return 0;
1019bad_high:
1020 ebitmap_destroy(&r->level[0].cat);
1021out:
1022 return rc;
1023}
1024
1025/*
1026 * Read and validate a security context structure
1027 * from a policydb binary representation file.
1028 */
1029static int context_read_and_validate(struct context *c,
1030 struct policydb *p,
1031 void *fp)
1032{
1033 __le32 buf[3];
1034 int rc;
1035
1036 rc = next_entry(buf, fp, sizeof buf);
1037 if (rc) {
1038 pr_err("SELinux: context truncated\n");
1039 goto out;
1040 }
1041 c->user = le32_to_cpu(buf[0]);
1042 c->role = le32_to_cpu(buf[1]);
1043 c->type = le32_to_cpu(buf[2]);
1044 if (p->policyvers >= POLICYDB_VERSION_MLS) {
1045 rc = mls_read_range_helper(&c->range, fp);
1046 if (rc) {
1047 pr_err("SELinux: error reading MLS range of context\n");
1048 goto out;
1049 }
1050 }
1051
1052 rc = -EINVAL;
1053 if (!policydb_context_isvalid(p, c)) {
1054 pr_err("SELinux: invalid security context\n");
1055 context_destroy(c);
1056 goto out;
1057 }
1058 rc = 0;
1059out:
1060 return rc;
1061}
1062
1063/*
1064 * The following *_read functions are used to
1065 * read the symbol data from a policy database
1066 * binary representation file.
1067 */
1068
1069static int str_read(char **strp, gfp_t flags, void *fp, u32 len)
1070{
1071 int rc;
1072 char *str;
1073
1074 if ((len == 0) || (len == (u32)-1))
1075 return -EINVAL;
1076
1077 str = kmalloc(len + 1, flags | __GFP_NOWARN);
1078 if (!str)
1079 return -ENOMEM;
1080
1081 rc = next_entry(str, fp, len);
1082 if (rc) {
1083 kfree(str);
1084 return rc;
1085 }
1086
1087 str[len] = '\0';
1088 *strp = str;
1089 return 0;
1090}
1091
1092static int perm_read(struct policydb *p, struct symtab *s, void *fp)
1093{
1094 char *key = NULL;
1095 struct perm_datum *perdatum;
1096 int rc;
1097 __le32 buf[2];
1098 u32 len;
1099
1100 perdatum = kzalloc(sizeof(*perdatum), GFP_KERNEL);
1101 if (!perdatum)
1102 return -ENOMEM;
1103
1104 rc = next_entry(buf, fp, sizeof buf);
1105 if (rc)
1106 goto bad;
1107
1108 len = le32_to_cpu(buf[0]);
1109 perdatum->value = le32_to_cpu(buf[1]);
1110
1111 rc = str_read(&key, GFP_KERNEL, fp, len);
1112 if (rc)
1113 goto bad;
1114
1115 rc = symtab_insert(s, key, perdatum);
1116 if (rc)
1117 goto bad;
1118
1119 return 0;
1120bad:
1121 perm_destroy(key, perdatum, NULL);
1122 return rc;
1123}
1124
1125static int common_read(struct policydb *p, struct symtab *s, void *fp)
1126{
1127 char *key = NULL;
1128 struct common_datum *comdatum;
1129 __le32 buf[4];
1130 u32 len, nel;
1131 int i, rc;
1132
1133 comdatum = kzalloc(sizeof(*comdatum), GFP_KERNEL);
1134 if (!comdatum)
1135 return -ENOMEM;
1136
1137 rc = next_entry(buf, fp, sizeof buf);
1138 if (rc)
1139 goto bad;
1140
1141 len = le32_to_cpu(buf[0]);
1142 comdatum->value = le32_to_cpu(buf[1]);
1143 nel = le32_to_cpu(buf[3]);
1144
1145 rc = symtab_init(&comdatum->permissions, nel);
1146 if (rc)
1147 goto bad;
1148 comdatum->permissions.nprim = le32_to_cpu(buf[2]);
1149
1150 rc = str_read(&key, GFP_KERNEL, fp, len);
1151 if (rc)
1152 goto bad;
1153
1154 for (i = 0; i < nel; i++) {
1155 rc = perm_read(p, &comdatum->permissions, fp);
1156 if (rc)
1157 goto bad;
1158 }
1159
1160 rc = symtab_insert(s, key, comdatum);
1161 if (rc)
1162 goto bad;
1163 return 0;
1164bad:
1165 common_destroy(key, comdatum, NULL);
1166 return rc;
1167}
1168
1169static void type_set_init(struct type_set *t)
1170{
1171 ebitmap_init(&t->types);
1172 ebitmap_init(&t->negset);
1173}
1174
1175static int type_set_read(struct type_set *t, void *fp)
1176{
1177 __le32 buf[1];
1178 int rc;
1179
1180 if (ebitmap_read(&t->types, fp))
1181 return -EINVAL;
1182 if (ebitmap_read(&t->negset, fp))
1183 return -EINVAL;
1184
1185 rc = next_entry(buf, fp, sizeof(u32));
1186 if (rc < 0)
1187 return -EINVAL;
1188 t->flags = le32_to_cpu(buf[0]);
1189
1190 return 0;
1191}
1192
1193
1194static int read_cons_helper(struct policydb *p,
1195 struct constraint_node **nodep,
1196 int ncons, int allowxtarget, void *fp)
1197{
1198 struct constraint_node *c, *lc;
1199 struct constraint_expr *e, *le;
1200 __le32 buf[3];
1201 u32 nexpr;
1202 int rc, i, j, depth;
1203
1204 lc = NULL;
1205 for (i = 0; i < ncons; i++) {
1206 c = kzalloc(sizeof(*c), GFP_KERNEL);
1207 if (!c)
1208 return -ENOMEM;
1209
1210 if (lc)
1211 lc->next = c;
1212 else
1213 *nodep = c;
1214
1215 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1216 if (rc)
1217 return rc;
1218 c->permissions = le32_to_cpu(buf[0]);
1219 nexpr = le32_to_cpu(buf[1]);
1220 le = NULL;
1221 depth = -1;
1222 for (j = 0; j < nexpr; j++) {
1223 e = kzalloc(sizeof(*e), GFP_KERNEL);
1224 if (!e)
1225 return -ENOMEM;
1226
1227 if (le)
1228 le->next = e;
1229 else
1230 c->expr = e;
1231
1232 rc = next_entry(buf, fp, (sizeof(u32) * 3));
1233 if (rc)
1234 return rc;
1235 e->expr_type = le32_to_cpu(buf[0]);
1236 e->attr = le32_to_cpu(buf[1]);
1237 e->op = le32_to_cpu(buf[2]);
1238
1239 switch (e->expr_type) {
1240 case CEXPR_NOT:
1241 if (depth < 0)
1242 return -EINVAL;
1243 break;
1244 case CEXPR_AND:
1245 case CEXPR_OR:
1246 if (depth < 1)
1247 return -EINVAL;
1248 depth--;
1249 break;
1250 case CEXPR_ATTR:
1251 if (depth == (CEXPR_MAXDEPTH - 1))
1252 return -EINVAL;
1253 depth++;
1254 break;
1255 case CEXPR_NAMES:
1256 if (!allowxtarget && (e->attr & CEXPR_XTARGET))
1257 return -EINVAL;
1258 if (depth == (CEXPR_MAXDEPTH - 1))
1259 return -EINVAL;
1260 depth++;
1261 rc = ebitmap_read(&e->names, fp);
1262 if (rc)
1263 return rc;
1264 if (p->policyvers >=
1265 POLICYDB_VERSION_CONSTRAINT_NAMES) {
1266 e->type_names = kzalloc(sizeof
1267 (*e->type_names), GFP_KERNEL);
1268 if (!e->type_names)
1269 return -ENOMEM;
1270 type_set_init(e->type_names);
1271 rc = type_set_read(e->type_names, fp);
1272 if (rc)
1273 return rc;
1274 }
1275 break;
1276 default:
1277 return -EINVAL;
1278 }
1279 le = e;
1280 }
1281 if (depth != 0)
1282 return -EINVAL;
1283 lc = c;
1284 }
1285
1286 return 0;
1287}
1288
1289static int class_read(struct policydb *p, struct symtab *s, void *fp)
1290{
1291 char *key = NULL;
1292 struct class_datum *cladatum;
1293 __le32 buf[6];
1294 u32 len, len2, ncons, nel;
1295 int i, rc;
1296
1297 cladatum = kzalloc(sizeof(*cladatum), GFP_KERNEL);
1298 if (!cladatum)
1299 return -ENOMEM;
1300
1301 rc = next_entry(buf, fp, sizeof(u32)*6);
1302 if (rc)
1303 goto bad;
1304
1305 len = le32_to_cpu(buf[0]);
1306 len2 = le32_to_cpu(buf[1]);
1307 cladatum->value = le32_to_cpu(buf[2]);
1308 nel = le32_to_cpu(buf[4]);
1309
1310 rc = symtab_init(&cladatum->permissions, nel);
1311 if (rc)
1312 goto bad;
1313 cladatum->permissions.nprim = le32_to_cpu(buf[3]);
1314
1315 ncons = le32_to_cpu(buf[5]);
1316
1317 rc = str_read(&key, GFP_KERNEL, fp, len);
1318 if (rc)
1319 goto bad;
1320
1321 if (len2) {
1322 rc = str_read(&cladatum->comkey, GFP_KERNEL, fp, len2);
1323 if (rc)
1324 goto bad;
1325
1326 rc = -EINVAL;
1327 cladatum->comdatum = symtab_search(&p->p_commons,
1328 cladatum->comkey);
1329 if (!cladatum->comdatum) {
1330 pr_err("SELinux: unknown common %s\n",
1331 cladatum->comkey);
1332 goto bad;
1333 }
1334 }
1335 for (i = 0; i < nel; i++) {
1336 rc = perm_read(p, &cladatum->permissions, fp);
1337 if (rc)
1338 goto bad;
1339 }
1340
1341 rc = read_cons_helper(p, &cladatum->constraints, ncons, 0, fp);
1342 if (rc)
1343 goto bad;
1344
1345 if (p->policyvers >= POLICYDB_VERSION_VALIDATETRANS) {
1346 /* grab the validatetrans rules */
1347 rc = next_entry(buf, fp, sizeof(u32));
1348 if (rc)
1349 goto bad;
1350 ncons = le32_to_cpu(buf[0]);
1351 rc = read_cons_helper(p, &cladatum->validatetrans,
1352 ncons, 1, fp);
1353 if (rc)
1354 goto bad;
1355 }
1356
1357 if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) {
1358 rc = next_entry(buf, fp, sizeof(u32) * 3);
1359 if (rc)
1360 goto bad;
1361
1362 cladatum->default_user = le32_to_cpu(buf[0]);
1363 cladatum->default_role = le32_to_cpu(buf[1]);
1364 cladatum->default_range = le32_to_cpu(buf[2]);
1365 }
1366
1367 if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) {
1368 rc = next_entry(buf, fp, sizeof(u32) * 1);
1369 if (rc)
1370 goto bad;
1371 cladatum->default_type = le32_to_cpu(buf[0]);
1372 }
1373
1374 rc = symtab_insert(s, key, cladatum);
1375 if (rc)
1376 goto bad;
1377
1378 return 0;
1379bad:
1380 cls_destroy(key, cladatum, NULL);
1381 return rc;
1382}
1383
1384static int role_read(struct policydb *p, struct symtab *s, void *fp)
1385{
1386 char *key = NULL;
1387 struct role_datum *role;
1388 int rc, to_read = 2;
1389 __le32 buf[3];
1390 u32 len;
1391
1392 role = kzalloc(sizeof(*role), GFP_KERNEL);
1393 if (!role)
1394 return -ENOMEM;
1395
1396 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1397 to_read = 3;
1398
1399 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1400 if (rc)
1401 goto bad;
1402
1403 len = le32_to_cpu(buf[0]);
1404 role->value = le32_to_cpu(buf[1]);
1405 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1406 role->bounds = le32_to_cpu(buf[2]);
1407
1408 rc = str_read(&key, GFP_KERNEL, fp, len);
1409 if (rc)
1410 goto bad;
1411
1412 rc = ebitmap_read(&role->dominates, fp);
1413 if (rc)
1414 goto bad;
1415
1416 rc = ebitmap_read(&role->types, fp);
1417 if (rc)
1418 goto bad;
1419
1420 if (strcmp(key, OBJECT_R) == 0) {
1421 rc = -EINVAL;
1422 if (role->value != OBJECT_R_VAL) {
1423 pr_err("SELinux: Role %s has wrong value %d\n",
1424 OBJECT_R, role->value);
1425 goto bad;
1426 }
1427 rc = 0;
1428 goto bad;
1429 }
1430
1431 rc = symtab_insert(s, key, role);
1432 if (rc)
1433 goto bad;
1434 return 0;
1435bad:
1436 role_destroy(key, role, NULL);
1437 return rc;
1438}
1439
1440static int type_read(struct policydb *p, struct symtab *s, void *fp)
1441{
1442 char *key = NULL;
1443 struct type_datum *typdatum;
1444 int rc, to_read = 3;
1445 __le32 buf[4];
1446 u32 len;
1447
1448 typdatum = kzalloc(sizeof(*typdatum), GFP_KERNEL);
1449 if (!typdatum)
1450 return -ENOMEM;
1451
1452 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1453 to_read = 4;
1454
1455 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1456 if (rc)
1457 goto bad;
1458
1459 len = le32_to_cpu(buf[0]);
1460 typdatum->value = le32_to_cpu(buf[1]);
1461 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
1462 u32 prop = le32_to_cpu(buf[2]);
1463
1464 if (prop & TYPEDATUM_PROPERTY_PRIMARY)
1465 typdatum->primary = 1;
1466 if (prop & TYPEDATUM_PROPERTY_ATTRIBUTE)
1467 typdatum->attribute = 1;
1468
1469 typdatum->bounds = le32_to_cpu(buf[3]);
1470 } else {
1471 typdatum->primary = le32_to_cpu(buf[2]);
1472 }
1473
1474 rc = str_read(&key, GFP_KERNEL, fp, len);
1475 if (rc)
1476 goto bad;
1477
1478 rc = symtab_insert(s, key, typdatum);
1479 if (rc)
1480 goto bad;
1481 return 0;
1482bad:
1483 type_destroy(key, typdatum, NULL);
1484 return rc;
1485}
1486
1487
1488/*
1489 * Read a MLS level structure from a policydb binary
1490 * representation file.
1491 */
1492static int mls_read_level(struct mls_level *lp, void *fp)
1493{
1494 __le32 buf[1];
1495 int rc;
1496
1497 memset(lp, 0, sizeof(*lp));
1498
1499 rc = next_entry(buf, fp, sizeof buf);
1500 if (rc) {
1501 pr_err("SELinux: mls: truncated level\n");
1502 return rc;
1503 }
1504 lp->sens = le32_to_cpu(buf[0]);
1505
1506 rc = ebitmap_read(&lp->cat, fp);
1507 if (rc) {
1508 pr_err("SELinux: mls: error reading level categories\n");
1509 return rc;
1510 }
1511 return 0;
1512}
1513
1514static int user_read(struct policydb *p, struct symtab *s, void *fp)
1515{
1516 char *key = NULL;
1517 struct user_datum *usrdatum;
1518 int rc, to_read = 2;
1519 __le32 buf[3];
1520 u32 len;
1521
1522 usrdatum = kzalloc(sizeof(*usrdatum), GFP_KERNEL);
1523 if (!usrdatum)
1524 return -ENOMEM;
1525
1526 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1527 to_read = 3;
1528
1529 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1530 if (rc)
1531 goto bad;
1532
1533 len = le32_to_cpu(buf[0]);
1534 usrdatum->value = le32_to_cpu(buf[1]);
1535 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1536 usrdatum->bounds = le32_to_cpu(buf[2]);
1537
1538 rc = str_read(&key, GFP_KERNEL, fp, len);
1539 if (rc)
1540 goto bad;
1541
1542 rc = ebitmap_read(&usrdatum->roles, fp);
1543 if (rc)
1544 goto bad;
1545
1546 if (p->policyvers >= POLICYDB_VERSION_MLS) {
1547 rc = mls_read_range_helper(&usrdatum->range, fp);
1548 if (rc)
1549 goto bad;
1550 rc = mls_read_level(&usrdatum->dfltlevel, fp);
1551 if (rc)
1552 goto bad;
1553 }
1554
1555 rc = symtab_insert(s, key, usrdatum);
1556 if (rc)
1557 goto bad;
1558 return 0;
1559bad:
1560 user_destroy(key, usrdatum, NULL);
1561 return rc;
1562}
1563
1564static int sens_read(struct policydb *p, struct symtab *s, void *fp)
1565{
1566 char *key = NULL;
1567 struct level_datum *levdatum;
1568 int rc;
1569 __le32 buf[2];
1570 u32 len;
1571
1572 levdatum = kzalloc(sizeof(*levdatum), GFP_ATOMIC);
1573 if (!levdatum)
1574 return -ENOMEM;
1575
1576 rc = next_entry(buf, fp, sizeof buf);
1577 if (rc)
1578 goto bad;
1579
1580 len = le32_to_cpu(buf[0]);
1581 levdatum->isalias = le32_to_cpu(buf[1]);
1582
1583 rc = str_read(&key, GFP_ATOMIC, fp, len);
1584 if (rc)
1585 goto bad;
1586
1587 rc = -ENOMEM;
1588 levdatum->level = kmalloc(sizeof(*levdatum->level), GFP_ATOMIC);
1589 if (!levdatum->level)
1590 goto bad;
1591
1592 rc = mls_read_level(levdatum->level, fp);
1593 if (rc)
1594 goto bad;
1595
1596 rc = symtab_insert(s, key, levdatum);
1597 if (rc)
1598 goto bad;
1599 return 0;
1600bad:
1601 sens_destroy(key, levdatum, NULL);
1602 return rc;
1603}
1604
1605static int cat_read(struct policydb *p, struct symtab *s, void *fp)
1606{
1607 char *key = NULL;
1608 struct cat_datum *catdatum;
1609 int rc;
1610 __le32 buf[3];
1611 u32 len;
1612
1613 catdatum = kzalloc(sizeof(*catdatum), GFP_ATOMIC);
1614 if (!catdatum)
1615 return -ENOMEM;
1616
1617 rc = next_entry(buf, fp, sizeof buf);
1618 if (rc)
1619 goto bad;
1620
1621 len = le32_to_cpu(buf[0]);
1622 catdatum->value = le32_to_cpu(buf[1]);
1623 catdatum->isalias = le32_to_cpu(buf[2]);
1624
1625 rc = str_read(&key, GFP_ATOMIC, fp, len);
1626 if (rc)
1627 goto bad;
1628
1629 rc = symtab_insert(s, key, catdatum);
1630 if (rc)
1631 goto bad;
1632 return 0;
1633bad:
1634 cat_destroy(key, catdatum, NULL);
1635 return rc;
1636}
1637
1638static int (*const read_f[SYM_NUM]) (struct policydb *p,
1639 struct symtab *s, void *fp) = {
1640 common_read,
1641 class_read,
1642 role_read,
1643 type_read,
1644 user_read,
1645 cond_read_bool,
1646 sens_read,
1647 cat_read,
1648};
1649
1650static int user_bounds_sanity_check(void *key, void *datum, void *datap)
1651{
1652 struct user_datum *upper, *user;
1653 struct policydb *p = datap;
1654 int depth = 0;
1655
1656 upper = user = datum;
1657 while (upper->bounds) {
1658 struct ebitmap_node *node;
1659 unsigned long bit;
1660
1661 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1662 pr_err("SELinux: user %s: "
1663 "too deep or looped boundary",
1664 (char *) key);
1665 return -EINVAL;
1666 }
1667
1668 upper = p->user_val_to_struct[upper->bounds - 1];
1669 ebitmap_for_each_positive_bit(&user->roles, node, bit) {
1670 if (ebitmap_get_bit(&upper->roles, bit))
1671 continue;
1672
1673 pr_err("SELinux: boundary violated policy: "
1674 "user=%s role=%s bounds=%s\n",
1675 sym_name(p, SYM_USERS, user->value - 1),
1676 sym_name(p, SYM_ROLES, bit),
1677 sym_name(p, SYM_USERS, upper->value - 1));
1678
1679 return -EINVAL;
1680 }
1681 }
1682
1683 return 0;
1684}
1685
1686static int role_bounds_sanity_check(void *key, void *datum, void *datap)
1687{
1688 struct role_datum *upper, *role;
1689 struct policydb *p = datap;
1690 int depth = 0;
1691
1692 upper = role = datum;
1693 while (upper->bounds) {
1694 struct ebitmap_node *node;
1695 unsigned long bit;
1696
1697 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1698 pr_err("SELinux: role %s: "
1699 "too deep or looped bounds\n",
1700 (char *) key);
1701 return -EINVAL;
1702 }
1703
1704 upper = p->role_val_to_struct[upper->bounds - 1];
1705 ebitmap_for_each_positive_bit(&role->types, node, bit) {
1706 if (ebitmap_get_bit(&upper->types, bit))
1707 continue;
1708
1709 pr_err("SELinux: boundary violated policy: "
1710 "role=%s type=%s bounds=%s\n",
1711 sym_name(p, SYM_ROLES, role->value - 1),
1712 sym_name(p, SYM_TYPES, bit),
1713 sym_name(p, SYM_ROLES, upper->value - 1));
1714
1715 return -EINVAL;
1716 }
1717 }
1718
1719 return 0;
1720}
1721
1722static int type_bounds_sanity_check(void *key, void *datum, void *datap)
1723{
1724 struct type_datum *upper;
1725 struct policydb *p = datap;
1726 int depth = 0;
1727
1728 upper = datum;
1729 while (upper->bounds) {
1730 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1731 pr_err("SELinux: type %s: "
1732 "too deep or looped boundary\n",
1733 (char *) key);
1734 return -EINVAL;
1735 }
1736
1737 upper = p->type_val_to_struct[upper->bounds - 1];
1738 BUG_ON(!upper);
1739
1740 if (upper->attribute) {
1741 pr_err("SELinux: type %s: "
1742 "bounded by attribute %s",
1743 (char *) key,
1744 sym_name(p, SYM_TYPES, upper->value - 1));
1745 return -EINVAL;
1746 }
1747 }
1748
1749 return 0;
1750}
1751
1752static int policydb_bounds_sanity_check(struct policydb *p)
1753{
1754 int rc;
1755
1756 if (p->policyvers < POLICYDB_VERSION_BOUNDARY)
1757 return 0;
1758
1759 rc = hashtab_map(&p->p_users.table, user_bounds_sanity_check, p);
1760 if (rc)
1761 return rc;
1762
1763 rc = hashtab_map(&p->p_roles.table, role_bounds_sanity_check, p);
1764 if (rc)
1765 return rc;
1766
1767 rc = hashtab_map(&p->p_types.table, type_bounds_sanity_check, p);
1768 if (rc)
1769 return rc;
1770
1771 return 0;
1772}
1773
1774u16 string_to_security_class(struct policydb *p, const char *name)
1775{
1776 struct class_datum *cladatum;
1777
1778 cladatum = symtab_search(&p->p_classes, name);
1779 if (!cladatum)
1780 return 0;
1781
1782 return cladatum->value;
1783}
1784
1785u32 string_to_av_perm(struct policydb *p, u16 tclass, const char *name)
1786{
1787 struct class_datum *cladatum;
1788 struct perm_datum *perdatum = NULL;
1789 struct common_datum *comdatum;
1790
1791 if (!tclass || tclass > p->p_classes.nprim)
1792 return 0;
1793
1794 cladatum = p->class_val_to_struct[tclass-1];
1795 comdatum = cladatum->comdatum;
1796 if (comdatum)
1797 perdatum = symtab_search(&comdatum->permissions, name);
1798 if (!perdatum)
1799 perdatum = symtab_search(&cladatum->permissions, name);
1800 if (!perdatum)
1801 return 0;
1802
1803 return 1U << (perdatum->value-1);
1804}
1805
1806static int range_read(struct policydb *p, void *fp)
1807{
1808 struct range_trans *rt = NULL;
1809 struct mls_range *r = NULL;
1810 int i, rc;
1811 __le32 buf[2];
1812 u32 nel;
1813
1814 if (p->policyvers < POLICYDB_VERSION_MLS)
1815 return 0;
1816
1817 rc = next_entry(buf, fp, sizeof(u32));
1818 if (rc)
1819 return rc;
1820
1821 nel = le32_to_cpu(buf[0]);
1822
1823 rc = hashtab_init(&p->range_tr, nel);
1824 if (rc)
1825 return rc;
1826
1827 for (i = 0; i < nel; i++) {
1828 rc = -ENOMEM;
1829 rt = kzalloc(sizeof(*rt), GFP_KERNEL);
1830 if (!rt)
1831 goto out;
1832
1833 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1834 if (rc)
1835 goto out;
1836
1837 rt->source_type = le32_to_cpu(buf[0]);
1838 rt->target_type = le32_to_cpu(buf[1]);
1839 if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
1840 rc = next_entry(buf, fp, sizeof(u32));
1841 if (rc)
1842 goto out;
1843 rt->target_class = le32_to_cpu(buf[0]);
1844 } else
1845 rt->target_class = p->process_class;
1846
1847 rc = -EINVAL;
1848 if (!policydb_type_isvalid(p, rt->source_type) ||
1849 !policydb_type_isvalid(p, rt->target_type) ||
1850 !policydb_class_isvalid(p, rt->target_class))
1851 goto out;
1852
1853 rc = -ENOMEM;
1854 r = kzalloc(sizeof(*r), GFP_KERNEL);
1855 if (!r)
1856 goto out;
1857
1858 rc = mls_read_range_helper(r, fp);
1859 if (rc)
1860 goto out;
1861
1862 rc = -EINVAL;
1863 if (!mls_range_isvalid(p, r)) {
1864 pr_warn("SELinux: rangetrans: invalid range\n");
1865 goto out;
1866 }
1867
1868 rc = hashtab_insert(&p->range_tr, rt, r, rangetr_key_params);
1869 if (rc)
1870 goto out;
1871
1872 rt = NULL;
1873 r = NULL;
1874 }
1875 hash_eval(&p->range_tr, "rangetr");
1876 rc = 0;
1877out:
1878 kfree(rt);
1879 kfree(r);
1880 return rc;
1881}
1882
1883static int filename_trans_read_helper_compat(struct policydb *p, void *fp)
1884{
1885 struct filename_trans_key key, *ft = NULL;
1886 struct filename_trans_datum *last, *datum = NULL;
1887 char *name = NULL;
1888 u32 len, stype, otype;
1889 __le32 buf[4];
1890 int rc;
1891
1892 /* length of the path component string */
1893 rc = next_entry(buf, fp, sizeof(u32));
1894 if (rc)
1895 return rc;
1896 len = le32_to_cpu(buf[0]);
1897
1898 /* path component string */
1899 rc = str_read(&name, GFP_KERNEL, fp, len);
1900 if (rc)
1901 return rc;
1902
1903 rc = next_entry(buf, fp, sizeof(u32) * 4);
1904 if (rc)
1905 goto out;
1906
1907 stype = le32_to_cpu(buf[0]);
1908 key.ttype = le32_to_cpu(buf[1]);
1909 key.tclass = le32_to_cpu(buf[2]);
1910 key.name = name;
1911
1912 otype = le32_to_cpu(buf[3]);
1913
1914 last = NULL;
1915 datum = policydb_filenametr_search(p, &key);
1916 while (datum) {
1917 if (unlikely(ebitmap_get_bit(&datum->stypes, stype - 1))) {
1918 /* conflicting/duplicate rules are ignored */
1919 datum = NULL;
1920 goto out;
1921 }
1922 if (likely(datum->otype == otype))
1923 break;
1924 last = datum;
1925 datum = datum->next;
1926 }
1927 if (!datum) {
1928 rc = -ENOMEM;
1929 datum = kmalloc(sizeof(*datum), GFP_KERNEL);
1930 if (!datum)
1931 goto out;
1932
1933 ebitmap_init(&datum->stypes);
1934 datum->otype = otype;
1935 datum->next = NULL;
1936
1937 if (unlikely(last)) {
1938 last->next = datum;
1939 } else {
1940 rc = -ENOMEM;
1941 ft = kmemdup(&key, sizeof(key), GFP_KERNEL);
1942 if (!ft)
1943 goto out;
1944
1945 rc = hashtab_insert(&p->filename_trans, ft, datum,
1946 filenametr_key_params);
1947 if (rc)
1948 goto out;
1949 name = NULL;
1950
1951 rc = ebitmap_set_bit(&p->filename_trans_ttypes,
1952 key.ttype, 1);
1953 if (rc)
1954 return rc;
1955 }
1956 }
1957 kfree(name);
1958 return ebitmap_set_bit(&datum->stypes, stype - 1, 1);
1959
1960out:
1961 kfree(ft);
1962 kfree(name);
1963 kfree(datum);
1964 return rc;
1965}
1966
1967static int filename_trans_read_helper(struct policydb *p, void *fp)
1968{
1969 struct filename_trans_key *ft = NULL;
1970 struct filename_trans_datum **dst, *datum, *first = NULL;
1971 char *name = NULL;
1972 u32 len, ttype, tclass, ndatum, i;
1973 __le32 buf[3];
1974 int rc;
1975
1976 /* length of the path component string */
1977 rc = next_entry(buf, fp, sizeof(u32));
1978 if (rc)
1979 return rc;
1980 len = le32_to_cpu(buf[0]);
1981
1982 /* path component string */
1983 rc = str_read(&name, GFP_KERNEL, fp, len);
1984 if (rc)
1985 return rc;
1986
1987 rc = next_entry(buf, fp, sizeof(u32) * 3);
1988 if (rc)
1989 goto out;
1990
1991 ttype = le32_to_cpu(buf[0]);
1992 tclass = le32_to_cpu(buf[1]);
1993
1994 ndatum = le32_to_cpu(buf[2]);
1995 if (ndatum == 0) {
1996 pr_err("SELinux: Filename transition key with no datum\n");
1997 rc = -ENOENT;
1998 goto out;
1999 }
2000
2001 dst = &first;
2002 for (i = 0; i < ndatum; i++) {
2003 rc = -ENOMEM;
2004 datum = kmalloc(sizeof(*datum), GFP_KERNEL);
2005 if (!datum)
2006 goto out;
2007
2008 *dst = datum;
2009
2010 /* ebitmap_read() will at least init the bitmap */
2011 rc = ebitmap_read(&datum->stypes, fp);
2012 if (rc)
2013 goto out;
2014
2015 rc = next_entry(buf, fp, sizeof(u32));
2016 if (rc)
2017 goto out;
2018
2019 datum->otype = le32_to_cpu(buf[0]);
2020 datum->next = NULL;
2021
2022 dst = &datum->next;
2023 }
2024
2025 rc = -ENOMEM;
2026 ft = kmalloc(sizeof(*ft), GFP_KERNEL);
2027 if (!ft)
2028 goto out;
2029
2030 ft->ttype = ttype;
2031 ft->tclass = tclass;
2032 ft->name = name;
2033
2034 rc = hashtab_insert(&p->filename_trans, ft, first,
2035 filenametr_key_params);
2036 if (rc == -EEXIST)
2037 pr_err("SELinux: Duplicate filename transition key\n");
2038 if (rc)
2039 goto out;
2040
2041 return ebitmap_set_bit(&p->filename_trans_ttypes, ttype, 1);
2042
2043out:
2044 kfree(ft);
2045 kfree(name);
2046 while (first) {
2047 datum = first;
2048 first = first->next;
2049
2050 ebitmap_destroy(&datum->stypes);
2051 kfree(datum);
2052 }
2053 return rc;
2054}
2055
2056static int filename_trans_read(struct policydb *p, void *fp)
2057{
2058 u32 nel;
2059 __le32 buf[1];
2060 int rc, i;
2061
2062 if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
2063 return 0;
2064
2065 rc = next_entry(buf, fp, sizeof(u32));
2066 if (rc)
2067 return rc;
2068 nel = le32_to_cpu(buf[0]);
2069
2070 if (p->policyvers < POLICYDB_VERSION_COMP_FTRANS) {
2071 p->compat_filename_trans_count = nel;
2072
2073 rc = hashtab_init(&p->filename_trans, (1 << 11));
2074 if (rc)
2075 return rc;
2076
2077 for (i = 0; i < nel; i++) {
2078 rc = filename_trans_read_helper_compat(p, fp);
2079 if (rc)
2080 return rc;
2081 }
2082 } else {
2083 rc = hashtab_init(&p->filename_trans, nel);
2084 if (rc)
2085 return rc;
2086
2087 for (i = 0; i < nel; i++) {
2088 rc = filename_trans_read_helper(p, fp);
2089 if (rc)
2090 return rc;
2091 }
2092 }
2093 hash_eval(&p->filename_trans, "filenametr");
2094 return 0;
2095}
2096
2097static int genfs_read(struct policydb *p, void *fp)
2098{
2099 int i, j, rc;
2100 u32 nel, nel2, len, len2;
2101 __le32 buf[1];
2102 struct ocontext *l, *c;
2103 struct ocontext *newc = NULL;
2104 struct genfs *genfs_p, *genfs;
2105 struct genfs *newgenfs = NULL;
2106
2107 rc = next_entry(buf, fp, sizeof(u32));
2108 if (rc)
2109 return rc;
2110 nel = le32_to_cpu(buf[0]);
2111
2112 for (i = 0; i < nel; i++) {
2113 rc = next_entry(buf, fp, sizeof(u32));
2114 if (rc)
2115 goto out;
2116 len = le32_to_cpu(buf[0]);
2117
2118 rc = -ENOMEM;
2119 newgenfs = kzalloc(sizeof(*newgenfs), GFP_KERNEL);
2120 if (!newgenfs)
2121 goto out;
2122
2123 rc = str_read(&newgenfs->fstype, GFP_KERNEL, fp, len);
2124 if (rc)
2125 goto out;
2126
2127 for (genfs_p = NULL, genfs = p->genfs; genfs;
2128 genfs_p = genfs, genfs = genfs->next) {
2129 rc = -EINVAL;
2130 if (strcmp(newgenfs->fstype, genfs->fstype) == 0) {
2131 pr_err("SELinux: dup genfs fstype %s\n",
2132 newgenfs->fstype);
2133 goto out;
2134 }
2135 if (strcmp(newgenfs->fstype, genfs->fstype) < 0)
2136 break;
2137 }
2138 newgenfs->next = genfs;
2139 if (genfs_p)
2140 genfs_p->next = newgenfs;
2141 else
2142 p->genfs = newgenfs;
2143 genfs = newgenfs;
2144 newgenfs = NULL;
2145
2146 rc = next_entry(buf, fp, sizeof(u32));
2147 if (rc)
2148 goto out;
2149
2150 nel2 = le32_to_cpu(buf[0]);
2151 for (j = 0; j < nel2; j++) {
2152 rc = next_entry(buf, fp, sizeof(u32));
2153 if (rc)
2154 goto out;
2155 len = le32_to_cpu(buf[0]);
2156
2157 rc = -ENOMEM;
2158 newc = kzalloc(sizeof(*newc), GFP_KERNEL);
2159 if (!newc)
2160 goto out;
2161
2162 rc = str_read(&newc->u.name, GFP_KERNEL, fp, len);
2163 if (rc)
2164 goto out;
2165
2166 rc = next_entry(buf, fp, sizeof(u32));
2167 if (rc)
2168 goto out;
2169
2170 newc->v.sclass = le32_to_cpu(buf[0]);
2171 rc = context_read_and_validate(&newc->context[0], p, fp);
2172 if (rc)
2173 goto out;
2174
2175 for (l = NULL, c = genfs->head; c;
2176 l = c, c = c->next) {
2177 rc = -EINVAL;
2178 if (!strcmp(newc->u.name, c->u.name) &&
2179 (!c->v.sclass || !newc->v.sclass ||
2180 newc->v.sclass == c->v.sclass)) {
2181 pr_err("SELinux: dup genfs entry (%s,%s)\n",
2182 genfs->fstype, c->u.name);
2183 goto out;
2184 }
2185 len = strlen(newc->u.name);
2186 len2 = strlen(c->u.name);
2187 if (len > len2)
2188 break;
2189 }
2190
2191 newc->next = c;
2192 if (l)
2193 l->next = newc;
2194 else
2195 genfs->head = newc;
2196 newc = NULL;
2197 }
2198 }
2199 rc = 0;
2200out:
2201 if (newgenfs) {
2202 kfree(newgenfs->fstype);
2203 kfree(newgenfs);
2204 }
2205 ocontext_destroy(newc, OCON_FSUSE);
2206
2207 return rc;
2208}
2209
2210static int ocontext_read(struct policydb *p, const struct policydb_compat_info *info,
2211 void *fp)
2212{
2213 int i, j, rc;
2214 u32 nel, len;
2215 __be64 prefixbuf[1];
2216 __le32 buf[3];
2217 struct ocontext *l, *c;
2218 u32 nodebuf[8];
2219
2220 for (i = 0; i < info->ocon_num; i++) {
2221 rc = next_entry(buf, fp, sizeof(u32));
2222 if (rc)
2223 goto out;
2224 nel = le32_to_cpu(buf[0]);
2225
2226 l = NULL;
2227 for (j = 0; j < nel; j++) {
2228 rc = -ENOMEM;
2229 c = kzalloc(sizeof(*c), GFP_KERNEL);
2230 if (!c)
2231 goto out;
2232 if (l)
2233 l->next = c;
2234 else
2235 p->ocontexts[i] = c;
2236 l = c;
2237
2238 switch (i) {
2239 case OCON_ISID:
2240 rc = next_entry(buf, fp, sizeof(u32));
2241 if (rc)
2242 goto out;
2243
2244 c->sid[0] = le32_to_cpu(buf[0]);
2245 rc = context_read_and_validate(&c->context[0], p, fp);
2246 if (rc)
2247 goto out;
2248 break;
2249 case OCON_FS:
2250 case OCON_NETIF:
2251 rc = next_entry(buf, fp, sizeof(u32));
2252 if (rc)
2253 goto out;
2254 len = le32_to_cpu(buf[0]);
2255
2256 rc = str_read(&c->u.name, GFP_KERNEL, fp, len);
2257 if (rc)
2258 goto out;
2259
2260 rc = context_read_and_validate(&c->context[0], p, fp);
2261 if (rc)
2262 goto out;
2263 rc = context_read_and_validate(&c->context[1], p, fp);
2264 if (rc)
2265 goto out;
2266 break;
2267 case OCON_PORT:
2268 rc = next_entry(buf, fp, sizeof(u32)*3);
2269 if (rc)
2270 goto out;
2271 c->u.port.protocol = le32_to_cpu(buf[0]);
2272 c->u.port.low_port = le32_to_cpu(buf[1]);
2273 c->u.port.high_port = le32_to_cpu(buf[2]);
2274 rc = context_read_and_validate(&c->context[0], p, fp);
2275 if (rc)
2276 goto out;
2277 break;
2278 case OCON_NODE:
2279 rc = next_entry(nodebuf, fp, sizeof(u32) * 2);
2280 if (rc)
2281 goto out;
2282 c->u.node.addr = nodebuf[0]; /* network order */
2283 c->u.node.mask = nodebuf[1]; /* network order */
2284 rc = context_read_and_validate(&c->context[0], p, fp);
2285 if (rc)
2286 goto out;
2287 break;
2288 case OCON_FSUSE:
2289 rc = next_entry(buf, fp, sizeof(u32)*2);
2290 if (rc)
2291 goto out;
2292
2293 rc = -EINVAL;
2294 c->v.behavior = le32_to_cpu(buf[0]);
2295 /* Determined at runtime, not in policy DB. */
2296 if (c->v.behavior == SECURITY_FS_USE_MNTPOINT)
2297 goto out;
2298 if (c->v.behavior > SECURITY_FS_USE_MAX)
2299 goto out;
2300
2301 len = le32_to_cpu(buf[1]);
2302 rc = str_read(&c->u.name, GFP_KERNEL, fp, len);
2303 if (rc)
2304 goto out;
2305
2306 rc = context_read_and_validate(&c->context[0], p, fp);
2307 if (rc)
2308 goto out;
2309 break;
2310 case OCON_NODE6: {
2311 int k;
2312
2313 rc = next_entry(nodebuf, fp, sizeof(u32) * 8);
2314 if (rc)
2315 goto out;
2316 for (k = 0; k < 4; k++)
2317 c->u.node6.addr[k] = nodebuf[k];
2318 for (k = 0; k < 4; k++)
2319 c->u.node6.mask[k] = nodebuf[k+4];
2320 rc = context_read_and_validate(&c->context[0], p, fp);
2321 if (rc)
2322 goto out;
2323 break;
2324 }
2325 case OCON_IBPKEY: {
2326 u32 pkey_lo, pkey_hi;
2327
2328 rc = next_entry(prefixbuf, fp, sizeof(u64));
2329 if (rc)
2330 goto out;
2331
2332 /* we need to have subnet_prefix in CPU order */
2333 c->u.ibpkey.subnet_prefix = be64_to_cpu(prefixbuf[0]);
2334
2335 rc = next_entry(buf, fp, sizeof(u32) * 2);
2336 if (rc)
2337 goto out;
2338
2339 pkey_lo = le32_to_cpu(buf[0]);
2340 pkey_hi = le32_to_cpu(buf[1]);
2341
2342 if (pkey_lo > U16_MAX || pkey_hi > U16_MAX) {
2343 rc = -EINVAL;
2344 goto out;
2345 }
2346
2347 c->u.ibpkey.low_pkey = pkey_lo;
2348 c->u.ibpkey.high_pkey = pkey_hi;
2349
2350 rc = context_read_and_validate(&c->context[0],
2351 p,
2352 fp);
2353 if (rc)
2354 goto out;
2355 break;
2356 }
2357 case OCON_IBENDPORT: {
2358 u32 port;
2359
2360 rc = next_entry(buf, fp, sizeof(u32) * 2);
2361 if (rc)
2362 goto out;
2363 len = le32_to_cpu(buf[0]);
2364
2365 rc = str_read(&c->u.ibendport.dev_name, GFP_KERNEL, fp, len);
2366 if (rc)
2367 goto out;
2368
2369 port = le32_to_cpu(buf[1]);
2370 if (port > U8_MAX || port == 0) {
2371 rc = -EINVAL;
2372 goto out;
2373 }
2374
2375 c->u.ibendport.port = port;
2376
2377 rc = context_read_and_validate(&c->context[0],
2378 p,
2379 fp);
2380 if (rc)
2381 goto out;
2382 break;
2383 } /* end case */
2384 } /* end switch */
2385 }
2386 }
2387 rc = 0;
2388out:
2389 return rc;
2390}
2391
2392/*
2393 * Read the configuration data from a policy database binary
2394 * representation file into a policy database structure.
2395 */
2396int policydb_read(struct policydb *p, void *fp)
2397{
2398 struct role_allow *ra, *lra;
2399 struct role_trans_key *rtk = NULL;
2400 struct role_trans_datum *rtd = NULL;
2401 int i, j, rc;
2402 __le32 buf[4];
2403 u32 len, nprim, nel, perm;
2404
2405 char *policydb_str;
2406 const struct policydb_compat_info *info;
2407
2408 policydb_init(p);
2409
2410 /* Read the magic number and string length. */
2411 rc = next_entry(buf, fp, sizeof(u32) * 2);
2412 if (rc)
2413 goto bad;
2414
2415 rc = -EINVAL;
2416 if (le32_to_cpu(buf[0]) != POLICYDB_MAGIC) {
2417 pr_err("SELinux: policydb magic number 0x%x does "
2418 "not match expected magic number 0x%x\n",
2419 le32_to_cpu(buf[0]), POLICYDB_MAGIC);
2420 goto bad;
2421 }
2422
2423 rc = -EINVAL;
2424 len = le32_to_cpu(buf[1]);
2425 if (len != strlen(POLICYDB_STRING)) {
2426 pr_err("SELinux: policydb string length %d does not "
2427 "match expected length %zu\n",
2428 len, strlen(POLICYDB_STRING));
2429 goto bad;
2430 }
2431
2432 rc = -ENOMEM;
2433 policydb_str = kmalloc(len + 1, GFP_KERNEL);
2434 if (!policydb_str) {
2435 pr_err("SELinux: unable to allocate memory for policydb "
2436 "string of length %d\n", len);
2437 goto bad;
2438 }
2439
2440 rc = next_entry(policydb_str, fp, len);
2441 if (rc) {
2442 pr_err("SELinux: truncated policydb string identifier\n");
2443 kfree(policydb_str);
2444 goto bad;
2445 }
2446
2447 rc = -EINVAL;
2448 policydb_str[len] = '\0';
2449 if (strcmp(policydb_str, POLICYDB_STRING)) {
2450 pr_err("SELinux: policydb string %s does not match "
2451 "my string %s\n", policydb_str, POLICYDB_STRING);
2452 kfree(policydb_str);
2453 goto bad;
2454 }
2455 /* Done with policydb_str. */
2456 kfree(policydb_str);
2457 policydb_str = NULL;
2458
2459 /* Read the version and table sizes. */
2460 rc = next_entry(buf, fp, sizeof(u32)*4);
2461 if (rc)
2462 goto bad;
2463
2464 rc = -EINVAL;
2465 p->policyvers = le32_to_cpu(buf[0]);
2466 if (p->policyvers < POLICYDB_VERSION_MIN ||
2467 p->policyvers > POLICYDB_VERSION_MAX) {
2468 pr_err("SELinux: policydb version %d does not match "
2469 "my version range %d-%d\n",
2470 le32_to_cpu(buf[0]), POLICYDB_VERSION_MIN, POLICYDB_VERSION_MAX);
2471 goto bad;
2472 }
2473
2474 if ((le32_to_cpu(buf[1]) & POLICYDB_CONFIG_MLS)) {
2475 p->mls_enabled = 1;
2476
2477 rc = -EINVAL;
2478 if (p->policyvers < POLICYDB_VERSION_MLS) {
2479 pr_err("SELinux: security policydb version %d "
2480 "(MLS) not backwards compatible\n",
2481 p->policyvers);
2482 goto bad;
2483 }
2484 }
2485 p->reject_unknown = !!(le32_to_cpu(buf[1]) & REJECT_UNKNOWN);
2486 p->allow_unknown = !!(le32_to_cpu(buf[1]) & ALLOW_UNKNOWN);
2487
2488 if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
2489 rc = ebitmap_read(&p->policycaps, fp);
2490 if (rc)
2491 goto bad;
2492 }
2493
2494 if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
2495 rc = ebitmap_read(&p->permissive_map, fp);
2496 if (rc)
2497 goto bad;
2498 }
2499
2500 rc = -EINVAL;
2501 info = policydb_lookup_compat(p->policyvers);
2502 if (!info) {
2503 pr_err("SELinux: unable to find policy compat info "
2504 "for version %d\n", p->policyvers);
2505 goto bad;
2506 }
2507
2508 rc = -EINVAL;
2509 if (le32_to_cpu(buf[2]) != info->sym_num ||
2510 le32_to_cpu(buf[3]) != info->ocon_num) {
2511 pr_err("SELinux: policydb table sizes (%d,%d) do "
2512 "not match mine (%d,%d)\n", le32_to_cpu(buf[2]),
2513 le32_to_cpu(buf[3]),
2514 info->sym_num, info->ocon_num);
2515 goto bad;
2516 }
2517
2518 for (i = 0; i < info->sym_num; i++) {
2519 rc = next_entry(buf, fp, sizeof(u32)*2);
2520 if (rc)
2521 goto bad;
2522 nprim = le32_to_cpu(buf[0]);
2523 nel = le32_to_cpu(buf[1]);
2524
2525 rc = symtab_init(&p->symtab[i], nel);
2526 if (rc)
2527 goto out;
2528
2529 if (i == SYM_ROLES) {
2530 rc = roles_init(p);
2531 if (rc)
2532 goto out;
2533 }
2534
2535 for (j = 0; j < nel; j++) {
2536 rc = read_f[i](p, &p->symtab[i], fp);
2537 if (rc)
2538 goto bad;
2539 }
2540
2541 p->symtab[i].nprim = nprim;
2542 }
2543
2544 rc = -EINVAL;
2545 p->process_class = string_to_security_class(p, "process");
2546 if (!p->process_class) {
2547 pr_err("SELinux: process class is required, not defined in policy\n");
2548 goto bad;
2549 }
2550
2551 rc = avtab_read(&p->te_avtab, fp, p);
2552 if (rc)
2553 goto bad;
2554
2555 if (p->policyvers >= POLICYDB_VERSION_BOOL) {
2556 rc = cond_read_list(p, fp);
2557 if (rc)
2558 goto bad;
2559 }
2560
2561 rc = next_entry(buf, fp, sizeof(u32));
2562 if (rc)
2563 goto bad;
2564 nel = le32_to_cpu(buf[0]);
2565
2566 rc = hashtab_init(&p->role_tr, nel);
2567 if (rc)
2568 goto bad;
2569 for (i = 0; i < nel; i++) {
2570 rc = -ENOMEM;
2571 rtk = kmalloc(sizeof(*rtk), GFP_KERNEL);
2572 if (!rtk)
2573 goto bad;
2574
2575 rc = -ENOMEM;
2576 rtd = kmalloc(sizeof(*rtd), GFP_KERNEL);
2577 if (!rtd)
2578 goto bad;
2579
2580 rc = next_entry(buf, fp, sizeof(u32)*3);
2581 if (rc)
2582 goto bad;
2583
2584 rtk->role = le32_to_cpu(buf[0]);
2585 rtk->type = le32_to_cpu(buf[1]);
2586 rtd->new_role = le32_to_cpu(buf[2]);
2587 if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2588 rc = next_entry(buf, fp, sizeof(u32));
2589 if (rc)
2590 goto bad;
2591 rtk->tclass = le32_to_cpu(buf[0]);
2592 } else
2593 rtk->tclass = p->process_class;
2594
2595 rc = -EINVAL;
2596 if (!policydb_role_isvalid(p, rtk->role) ||
2597 !policydb_type_isvalid(p, rtk->type) ||
2598 !policydb_class_isvalid(p, rtk->tclass) ||
2599 !policydb_role_isvalid(p, rtd->new_role))
2600 goto bad;
2601
2602 rc = hashtab_insert(&p->role_tr, rtk, rtd, roletr_key_params);
2603 if (rc)
2604 goto bad;
2605
2606 rtk = NULL;
2607 rtd = NULL;
2608 }
2609
2610 rc = next_entry(buf, fp, sizeof(u32));
2611 if (rc)
2612 goto bad;
2613 nel = le32_to_cpu(buf[0]);
2614 lra = NULL;
2615 for (i = 0; i < nel; i++) {
2616 rc = -ENOMEM;
2617 ra = kzalloc(sizeof(*ra), GFP_KERNEL);
2618 if (!ra)
2619 goto bad;
2620 if (lra)
2621 lra->next = ra;
2622 else
2623 p->role_allow = ra;
2624 rc = next_entry(buf, fp, sizeof(u32)*2);
2625 if (rc)
2626 goto bad;
2627
2628 rc = -EINVAL;
2629 ra->role = le32_to_cpu(buf[0]);
2630 ra->new_role = le32_to_cpu(buf[1]);
2631 if (!policydb_role_isvalid(p, ra->role) ||
2632 !policydb_role_isvalid(p, ra->new_role))
2633 goto bad;
2634 lra = ra;
2635 }
2636
2637 rc = filename_trans_read(p, fp);
2638 if (rc)
2639 goto bad;
2640
2641 rc = policydb_index(p);
2642 if (rc)
2643 goto bad;
2644
2645 rc = -EINVAL;
2646 perm = string_to_av_perm(p, p->process_class, "transition");
2647 if (!perm) {
2648 pr_err("SELinux: process transition permission is required, not defined in policy\n");
2649 goto bad;
2650 }
2651 p->process_trans_perms = perm;
2652 perm = string_to_av_perm(p, p->process_class, "dyntransition");
2653 if (!perm) {
2654 pr_err("SELinux: process dyntransition permission is required, not defined in policy\n");
2655 goto bad;
2656 }
2657 p->process_trans_perms |= perm;
2658
2659 rc = ocontext_read(p, info, fp);
2660 if (rc)
2661 goto bad;
2662
2663 rc = genfs_read(p, fp);
2664 if (rc)
2665 goto bad;
2666
2667 rc = range_read(p, fp);
2668 if (rc)
2669 goto bad;
2670
2671 rc = -ENOMEM;
2672 p->type_attr_map_array = kvcalloc(p->p_types.nprim,
2673 sizeof(*p->type_attr_map_array),
2674 GFP_KERNEL);
2675 if (!p->type_attr_map_array)
2676 goto bad;
2677
2678 /* just in case ebitmap_init() becomes more than just a memset(0): */
2679 for (i = 0; i < p->p_types.nprim; i++)
2680 ebitmap_init(&p->type_attr_map_array[i]);
2681
2682 for (i = 0; i < p->p_types.nprim; i++) {
2683 struct ebitmap *e = &p->type_attr_map_array[i];
2684
2685 if (p->policyvers >= POLICYDB_VERSION_AVTAB) {
2686 rc = ebitmap_read(e, fp);
2687 if (rc)
2688 goto bad;
2689 }
2690 /* add the type itself as the degenerate case */
2691 rc = ebitmap_set_bit(e, i, 1);
2692 if (rc)
2693 goto bad;
2694 }
2695
2696 rc = policydb_bounds_sanity_check(p);
2697 if (rc)
2698 goto bad;
2699
2700 rc = 0;
2701out:
2702 return rc;
2703bad:
2704 kfree(rtk);
2705 kfree(rtd);
2706 policydb_destroy(p);
2707 goto out;
2708}
2709
2710/*
2711 * Write a MLS level structure to a policydb binary
2712 * representation file.
2713 */
2714static int mls_write_level(struct mls_level *l, void *fp)
2715{
2716 __le32 buf[1];
2717 int rc;
2718
2719 buf[0] = cpu_to_le32(l->sens);
2720 rc = put_entry(buf, sizeof(u32), 1, fp);
2721 if (rc)
2722 return rc;
2723
2724 rc = ebitmap_write(&l->cat, fp);
2725 if (rc)
2726 return rc;
2727
2728 return 0;
2729}
2730
2731/*
2732 * Write a MLS range structure to a policydb binary
2733 * representation file.
2734 */
2735static int mls_write_range_helper(struct mls_range *r, void *fp)
2736{
2737 __le32 buf[3];
2738 size_t items;
2739 int rc, eq;
2740
2741 eq = mls_level_eq(&r->level[1], &r->level[0]);
2742
2743 if (eq)
2744 items = 2;
2745 else
2746 items = 3;
2747 buf[0] = cpu_to_le32(items-1);
2748 buf[1] = cpu_to_le32(r->level[0].sens);
2749 if (!eq)
2750 buf[2] = cpu_to_le32(r->level[1].sens);
2751
2752 BUG_ON(items > ARRAY_SIZE(buf));
2753
2754 rc = put_entry(buf, sizeof(u32), items, fp);
2755 if (rc)
2756 return rc;
2757
2758 rc = ebitmap_write(&r->level[0].cat, fp);
2759 if (rc)
2760 return rc;
2761 if (!eq) {
2762 rc = ebitmap_write(&r->level[1].cat, fp);
2763 if (rc)
2764 return rc;
2765 }
2766
2767 return 0;
2768}
2769
2770static int sens_write(void *vkey, void *datum, void *ptr)
2771{
2772 char *key = vkey;
2773 struct level_datum *levdatum = datum;
2774 struct policy_data *pd = ptr;
2775 void *fp = pd->fp;
2776 __le32 buf[2];
2777 size_t len;
2778 int rc;
2779
2780 len = strlen(key);
2781 buf[0] = cpu_to_le32(len);
2782 buf[1] = cpu_to_le32(levdatum->isalias);
2783 rc = put_entry(buf, sizeof(u32), 2, fp);
2784 if (rc)
2785 return rc;
2786
2787 rc = put_entry(key, 1, len, fp);
2788 if (rc)
2789 return rc;
2790
2791 rc = mls_write_level(levdatum->level, fp);
2792 if (rc)
2793 return rc;
2794
2795 return 0;
2796}
2797
2798static int cat_write(void *vkey, void *datum, void *ptr)
2799{
2800 char *key = vkey;
2801 struct cat_datum *catdatum = datum;
2802 struct policy_data *pd = ptr;
2803 void *fp = pd->fp;
2804 __le32 buf[3];
2805 size_t len;
2806 int rc;
2807
2808 len = strlen(key);
2809 buf[0] = cpu_to_le32(len);
2810 buf[1] = cpu_to_le32(catdatum->value);
2811 buf[2] = cpu_to_le32(catdatum->isalias);
2812 rc = put_entry(buf, sizeof(u32), 3, fp);
2813 if (rc)
2814 return rc;
2815
2816 rc = put_entry(key, 1, len, fp);
2817 if (rc)
2818 return rc;
2819
2820 return 0;
2821}
2822
2823static int role_trans_write_one(void *key, void *datum, void *ptr)
2824{
2825 struct role_trans_key *rtk = key;
2826 struct role_trans_datum *rtd = datum;
2827 struct policy_data *pd = ptr;
2828 void *fp = pd->fp;
2829 struct policydb *p = pd->p;
2830 __le32 buf[3];
2831 int rc;
2832
2833 buf[0] = cpu_to_le32(rtk->role);
2834 buf[1] = cpu_to_le32(rtk->type);
2835 buf[2] = cpu_to_le32(rtd->new_role);
2836 rc = put_entry(buf, sizeof(u32), 3, fp);
2837 if (rc)
2838 return rc;
2839 if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2840 buf[0] = cpu_to_le32(rtk->tclass);
2841 rc = put_entry(buf, sizeof(u32), 1, fp);
2842 if (rc)
2843 return rc;
2844 }
2845 return 0;
2846}
2847
2848static int role_trans_write(struct policydb *p, void *fp)
2849{
2850 struct policy_data pd = { .p = p, .fp = fp };
2851 __le32 buf[1];
2852 int rc;
2853
2854 buf[0] = cpu_to_le32(p->role_tr.nel);
2855 rc = put_entry(buf, sizeof(u32), 1, fp);
2856 if (rc)
2857 return rc;
2858
2859 return hashtab_map(&p->role_tr, role_trans_write_one, &pd);
2860}
2861
2862static int role_allow_write(struct role_allow *r, void *fp)
2863{
2864 struct role_allow *ra;
2865 __le32 buf[2];
2866 size_t nel;
2867 int rc;
2868
2869 nel = 0;
2870 for (ra = r; ra; ra = ra->next)
2871 nel++;
2872 buf[0] = cpu_to_le32(nel);
2873 rc = put_entry(buf, sizeof(u32), 1, fp);
2874 if (rc)
2875 return rc;
2876 for (ra = r; ra; ra = ra->next) {
2877 buf[0] = cpu_to_le32(ra->role);
2878 buf[1] = cpu_to_le32(ra->new_role);
2879 rc = put_entry(buf, sizeof(u32), 2, fp);
2880 if (rc)
2881 return rc;
2882 }
2883 return 0;
2884}
2885
2886/*
2887 * Write a security context structure
2888 * to a policydb binary representation file.
2889 */
2890static int context_write(struct policydb *p, struct context *c,
2891 void *fp)
2892{
2893 int rc;
2894 __le32 buf[3];
2895
2896 buf[0] = cpu_to_le32(c->user);
2897 buf[1] = cpu_to_le32(c->role);
2898 buf[2] = cpu_to_le32(c->type);
2899
2900 rc = put_entry(buf, sizeof(u32), 3, fp);
2901 if (rc)
2902 return rc;
2903
2904 rc = mls_write_range_helper(&c->range, fp);
2905 if (rc)
2906 return rc;
2907
2908 return 0;
2909}
2910
2911/*
2912 * The following *_write functions are used to
2913 * write the symbol data to a policy database
2914 * binary representation file.
2915 */
2916
2917static int perm_write(void *vkey, void *datum, void *fp)
2918{
2919 char *key = vkey;
2920 struct perm_datum *perdatum = datum;
2921 __le32 buf[2];
2922 size_t len;
2923 int rc;
2924
2925 len = strlen(key);
2926 buf[0] = cpu_to_le32(len);
2927 buf[1] = cpu_to_le32(perdatum->value);
2928 rc = put_entry(buf, sizeof(u32), 2, fp);
2929 if (rc)
2930 return rc;
2931
2932 rc = put_entry(key, 1, len, fp);
2933 if (rc)
2934 return rc;
2935
2936 return 0;
2937}
2938
2939static int common_write(void *vkey, void *datum, void *ptr)
2940{
2941 char *key = vkey;
2942 struct common_datum *comdatum = datum;
2943 struct policy_data *pd = ptr;
2944 void *fp = pd->fp;
2945 __le32 buf[4];
2946 size_t len;
2947 int rc;
2948
2949 len = strlen(key);
2950 buf[0] = cpu_to_le32(len);
2951 buf[1] = cpu_to_le32(comdatum->value);
2952 buf[2] = cpu_to_le32(comdatum->permissions.nprim);
2953 buf[3] = cpu_to_le32(comdatum->permissions.table.nel);
2954 rc = put_entry(buf, sizeof(u32), 4, fp);
2955 if (rc)
2956 return rc;
2957
2958 rc = put_entry(key, 1, len, fp);
2959 if (rc)
2960 return rc;
2961
2962 rc = hashtab_map(&comdatum->permissions.table, perm_write, fp);
2963 if (rc)
2964 return rc;
2965
2966 return 0;
2967}
2968
2969static int type_set_write(struct type_set *t, void *fp)
2970{
2971 int rc;
2972 __le32 buf[1];
2973
2974 if (ebitmap_write(&t->types, fp))
2975 return -EINVAL;
2976 if (ebitmap_write(&t->negset, fp))
2977 return -EINVAL;
2978
2979 buf[0] = cpu_to_le32(t->flags);
2980 rc = put_entry(buf, sizeof(u32), 1, fp);
2981 if (rc)
2982 return -EINVAL;
2983
2984 return 0;
2985}
2986
2987static int write_cons_helper(struct policydb *p, struct constraint_node *node,
2988 void *fp)
2989{
2990 struct constraint_node *c;
2991 struct constraint_expr *e;
2992 __le32 buf[3];
2993 u32 nel;
2994 int rc;
2995
2996 for (c = node; c; c = c->next) {
2997 nel = 0;
2998 for (e = c->expr; e; e = e->next)
2999 nel++;
3000 buf[0] = cpu_to_le32(c->permissions);
3001 buf[1] = cpu_to_le32(nel);
3002 rc = put_entry(buf, sizeof(u32), 2, fp);
3003 if (rc)
3004 return rc;
3005 for (e = c->expr; e; e = e->next) {
3006 buf[0] = cpu_to_le32(e->expr_type);
3007 buf[1] = cpu_to_le32(e->attr);
3008 buf[2] = cpu_to_le32(e->op);
3009 rc = put_entry(buf, sizeof(u32), 3, fp);
3010 if (rc)
3011 return rc;
3012
3013 switch (e->expr_type) {
3014 case CEXPR_NAMES:
3015 rc = ebitmap_write(&e->names, fp);
3016 if (rc)
3017 return rc;
3018 if (p->policyvers >=
3019 POLICYDB_VERSION_CONSTRAINT_NAMES) {
3020 rc = type_set_write(e->type_names, fp);
3021 if (rc)
3022 return rc;
3023 }
3024 break;
3025 default:
3026 break;
3027 }
3028 }
3029 }
3030
3031 return 0;
3032}
3033
3034static int class_write(void *vkey, void *datum, void *ptr)
3035{
3036 char *key = vkey;
3037 struct class_datum *cladatum = datum;
3038 struct policy_data *pd = ptr;
3039 void *fp = pd->fp;
3040 struct policydb *p = pd->p;
3041 struct constraint_node *c;
3042 __le32 buf[6];
3043 u32 ncons;
3044 size_t len, len2;
3045 int rc;
3046
3047 len = strlen(key);
3048 if (cladatum->comkey)
3049 len2 = strlen(cladatum->comkey);
3050 else
3051 len2 = 0;
3052
3053 ncons = 0;
3054 for (c = cladatum->constraints; c; c = c->next)
3055 ncons++;
3056
3057 buf[0] = cpu_to_le32(len);
3058 buf[1] = cpu_to_le32(len2);
3059 buf[2] = cpu_to_le32(cladatum->value);
3060 buf[3] = cpu_to_le32(cladatum->permissions.nprim);
3061 buf[4] = cpu_to_le32(cladatum->permissions.table.nel);
3062 buf[5] = cpu_to_le32(ncons);
3063 rc = put_entry(buf, sizeof(u32), 6, fp);
3064 if (rc)
3065 return rc;
3066
3067 rc = put_entry(key, 1, len, fp);
3068 if (rc)
3069 return rc;
3070
3071 if (cladatum->comkey) {
3072 rc = put_entry(cladatum->comkey, 1, len2, fp);
3073 if (rc)
3074 return rc;
3075 }
3076
3077 rc = hashtab_map(&cladatum->permissions.table, perm_write, fp);
3078 if (rc)
3079 return rc;
3080
3081 rc = write_cons_helper(p, cladatum->constraints, fp);
3082 if (rc)
3083 return rc;
3084
3085 /* write out the validatetrans rule */
3086 ncons = 0;
3087 for (c = cladatum->validatetrans; c; c = c->next)
3088 ncons++;
3089
3090 buf[0] = cpu_to_le32(ncons);
3091 rc = put_entry(buf, sizeof(u32), 1, fp);
3092 if (rc)
3093 return rc;
3094
3095 rc = write_cons_helper(p, cladatum->validatetrans, fp);
3096 if (rc)
3097 return rc;
3098
3099 if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) {
3100 buf[0] = cpu_to_le32(cladatum->default_user);
3101 buf[1] = cpu_to_le32(cladatum->default_role);
3102 buf[2] = cpu_to_le32(cladatum->default_range);
3103
3104 rc = put_entry(buf, sizeof(uint32_t), 3, fp);
3105 if (rc)
3106 return rc;
3107 }
3108
3109 if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) {
3110 buf[0] = cpu_to_le32(cladatum->default_type);
3111 rc = put_entry(buf, sizeof(uint32_t), 1, fp);
3112 if (rc)
3113 return rc;
3114 }
3115
3116 return 0;
3117}
3118
3119static int role_write(void *vkey, void *datum, void *ptr)
3120{
3121 char *key = vkey;
3122 struct role_datum *role = datum;
3123 struct policy_data *pd = ptr;
3124 void *fp = pd->fp;
3125 struct policydb *p = pd->p;
3126 __le32 buf[3];
3127 size_t items, len;
3128 int rc;
3129
3130 len = strlen(key);
3131 items = 0;
3132 buf[items++] = cpu_to_le32(len);
3133 buf[items++] = cpu_to_le32(role->value);
3134 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
3135 buf[items++] = cpu_to_le32(role->bounds);
3136
3137 BUG_ON(items > ARRAY_SIZE(buf));
3138
3139 rc = put_entry(buf, sizeof(u32), items, fp);
3140 if (rc)
3141 return rc;
3142
3143 rc = put_entry(key, 1, len, fp);
3144 if (rc)
3145 return rc;
3146
3147 rc = ebitmap_write(&role->dominates, fp);
3148 if (rc)
3149 return rc;
3150
3151 rc = ebitmap_write(&role->types, fp);
3152 if (rc)
3153 return rc;
3154
3155 return 0;
3156}
3157
3158static int type_write(void *vkey, void *datum, void *ptr)
3159{
3160 char *key = vkey;
3161 struct type_datum *typdatum = datum;
3162 struct policy_data *pd = ptr;
3163 struct policydb *p = pd->p;
3164 void *fp = pd->fp;
3165 __le32 buf[4];
3166 int rc;
3167 size_t items, len;
3168
3169 len = strlen(key);
3170 items = 0;
3171 buf[items++] = cpu_to_le32(len);
3172 buf[items++] = cpu_to_le32(typdatum->value);
3173 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
3174 u32 properties = 0;
3175
3176 if (typdatum->primary)
3177 properties |= TYPEDATUM_PROPERTY_PRIMARY;
3178
3179 if (typdatum->attribute)
3180 properties |= TYPEDATUM_PROPERTY_ATTRIBUTE;
3181
3182 buf[items++] = cpu_to_le32(properties);
3183 buf[items++] = cpu_to_le32(typdatum->bounds);
3184 } else {
3185 buf[items++] = cpu_to_le32(typdatum->primary);
3186 }
3187 BUG_ON(items > ARRAY_SIZE(buf));
3188 rc = put_entry(buf, sizeof(u32), items, fp);
3189 if (rc)
3190 return rc;
3191
3192 rc = put_entry(key, 1, len, fp);
3193 if (rc)
3194 return rc;
3195
3196 return 0;
3197}
3198
3199static int user_write(void *vkey, void *datum, void *ptr)
3200{
3201 char *key = vkey;
3202 struct user_datum *usrdatum = datum;
3203 struct policy_data *pd = ptr;
3204 struct policydb *p = pd->p;
3205 void *fp = pd->fp;
3206 __le32 buf[3];
3207 size_t items, len;
3208 int rc;
3209
3210 len = strlen(key);
3211 items = 0;
3212 buf[items++] = cpu_to_le32(len);
3213 buf[items++] = cpu_to_le32(usrdatum->value);
3214 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
3215 buf[items++] = cpu_to_le32(usrdatum->bounds);
3216 BUG_ON(items > ARRAY_SIZE(buf));
3217 rc = put_entry(buf, sizeof(u32), items, fp);
3218 if (rc)
3219 return rc;
3220
3221 rc = put_entry(key, 1, len, fp);
3222 if (rc)
3223 return rc;
3224
3225 rc = ebitmap_write(&usrdatum->roles, fp);
3226 if (rc)
3227 return rc;
3228
3229 rc = mls_write_range_helper(&usrdatum->range, fp);
3230 if (rc)
3231 return rc;
3232
3233 rc = mls_write_level(&usrdatum->dfltlevel, fp);
3234 if (rc)
3235 return rc;
3236
3237 return 0;
3238}
3239
3240static int (*const write_f[SYM_NUM]) (void *key, void *datum, void *datap) = {
3241 common_write,
3242 class_write,
3243 role_write,
3244 type_write,
3245 user_write,
3246 cond_write_bool,
3247 sens_write,
3248 cat_write,
3249};
3250
3251static int ocontext_write(struct policydb *p, const struct policydb_compat_info *info,
3252 void *fp)
3253{
3254 unsigned int i, j, rc;
3255 size_t nel, len;
3256 __be64 prefixbuf[1];
3257 __le32 buf[3];
3258 u32 nodebuf[8];
3259 struct ocontext *c;
3260 for (i = 0; i < info->ocon_num; i++) {
3261 nel = 0;
3262 for (c = p->ocontexts[i]; c; c = c->next)
3263 nel++;
3264 buf[0] = cpu_to_le32(nel);
3265 rc = put_entry(buf, sizeof(u32), 1, fp);
3266 if (rc)
3267 return rc;
3268 for (c = p->ocontexts[i]; c; c = c->next) {
3269 switch (i) {
3270 case OCON_ISID:
3271 buf[0] = cpu_to_le32(c->sid[0]);
3272 rc = put_entry(buf, sizeof(u32), 1, fp);
3273 if (rc)
3274 return rc;
3275 rc = context_write(p, &c->context[0], fp);
3276 if (rc)
3277 return rc;
3278 break;
3279 case OCON_FS:
3280 case OCON_NETIF:
3281 len = strlen(c->u.name);
3282 buf[0] = cpu_to_le32(len);
3283 rc = put_entry(buf, sizeof(u32), 1, fp);
3284 if (rc)
3285 return rc;
3286 rc = put_entry(c->u.name, 1, len, fp);
3287 if (rc)
3288 return rc;
3289 rc = context_write(p, &c->context[0], fp);
3290 if (rc)
3291 return rc;
3292 rc = context_write(p, &c->context[1], fp);
3293 if (rc)
3294 return rc;
3295 break;
3296 case OCON_PORT:
3297 buf[0] = cpu_to_le32(c->u.port.protocol);
3298 buf[1] = cpu_to_le32(c->u.port.low_port);
3299 buf[2] = cpu_to_le32(c->u.port.high_port);
3300 rc = put_entry(buf, sizeof(u32), 3, fp);
3301 if (rc)
3302 return rc;
3303 rc = context_write(p, &c->context[0], fp);
3304 if (rc)
3305 return rc;
3306 break;
3307 case OCON_NODE:
3308 nodebuf[0] = c->u.node.addr; /* network order */
3309 nodebuf[1] = c->u.node.mask; /* network order */
3310 rc = put_entry(nodebuf, sizeof(u32), 2, fp);
3311 if (rc)
3312 return rc;
3313 rc = context_write(p, &c->context[0], fp);
3314 if (rc)
3315 return rc;
3316 break;
3317 case OCON_FSUSE:
3318 buf[0] = cpu_to_le32(c->v.behavior);
3319 len = strlen(c->u.name);
3320 buf[1] = cpu_to_le32(len);
3321 rc = put_entry(buf, sizeof(u32), 2, fp);
3322 if (rc)
3323 return rc;
3324 rc = put_entry(c->u.name, 1, len, fp);
3325 if (rc)
3326 return rc;
3327 rc = context_write(p, &c->context[0], fp);
3328 if (rc)
3329 return rc;
3330 break;
3331 case OCON_NODE6:
3332 for (j = 0; j < 4; j++)
3333 nodebuf[j] = c->u.node6.addr[j]; /* network order */
3334 for (j = 0; j < 4; j++)
3335 nodebuf[j + 4] = c->u.node6.mask[j]; /* network order */
3336 rc = put_entry(nodebuf, sizeof(u32), 8, fp);
3337 if (rc)
3338 return rc;
3339 rc = context_write(p, &c->context[0], fp);
3340 if (rc)
3341 return rc;
3342 break;
3343 case OCON_IBPKEY:
3344 /* subnet_prefix is in CPU order */
3345 prefixbuf[0] = cpu_to_be64(c->u.ibpkey.subnet_prefix);
3346
3347 rc = put_entry(prefixbuf, sizeof(u64), 1, fp);
3348 if (rc)
3349 return rc;
3350
3351 buf[0] = cpu_to_le32(c->u.ibpkey.low_pkey);
3352 buf[1] = cpu_to_le32(c->u.ibpkey.high_pkey);
3353
3354 rc = put_entry(buf, sizeof(u32), 2, fp);
3355 if (rc)
3356 return rc;
3357 rc = context_write(p, &c->context[0], fp);
3358 if (rc)
3359 return rc;
3360 break;
3361 case OCON_IBENDPORT:
3362 len = strlen(c->u.ibendport.dev_name);
3363 buf[0] = cpu_to_le32(len);
3364 buf[1] = cpu_to_le32(c->u.ibendport.port);
3365 rc = put_entry(buf, sizeof(u32), 2, fp);
3366 if (rc)
3367 return rc;
3368 rc = put_entry(c->u.ibendport.dev_name, 1, len, fp);
3369 if (rc)
3370 return rc;
3371 rc = context_write(p, &c->context[0], fp);
3372 if (rc)
3373 return rc;
3374 break;
3375 }
3376 }
3377 }
3378 return 0;
3379}
3380
3381static int genfs_write(struct policydb *p, void *fp)
3382{
3383 struct genfs *genfs;
3384 struct ocontext *c;
3385 size_t len;
3386 __le32 buf[1];
3387 int rc;
3388
3389 len = 0;
3390 for (genfs = p->genfs; genfs; genfs = genfs->next)
3391 len++;
3392 buf[0] = cpu_to_le32(len);
3393 rc = put_entry(buf, sizeof(u32), 1, fp);
3394 if (rc)
3395 return rc;
3396 for (genfs = p->genfs; genfs; genfs = genfs->next) {
3397 len = strlen(genfs->fstype);
3398 buf[0] = cpu_to_le32(len);
3399 rc = put_entry(buf, sizeof(u32), 1, fp);
3400 if (rc)
3401 return rc;
3402 rc = put_entry(genfs->fstype, 1, len, fp);
3403 if (rc)
3404 return rc;
3405 len = 0;
3406 for (c = genfs->head; c; c = c->next)
3407 len++;
3408 buf[0] = cpu_to_le32(len);
3409 rc = put_entry(buf, sizeof(u32), 1, fp);
3410 if (rc)
3411 return rc;
3412 for (c = genfs->head; c; c = c->next) {
3413 len = strlen(c->u.name);
3414 buf[0] = cpu_to_le32(len);
3415 rc = put_entry(buf, sizeof(u32), 1, fp);
3416 if (rc)
3417 return rc;
3418 rc = put_entry(c->u.name, 1, len, fp);
3419 if (rc)
3420 return rc;
3421 buf[0] = cpu_to_le32(c->v.sclass);
3422 rc = put_entry(buf, sizeof(u32), 1, fp);
3423 if (rc)
3424 return rc;
3425 rc = context_write(p, &c->context[0], fp);
3426 if (rc)
3427 return rc;
3428 }
3429 }
3430 return 0;
3431}
3432
3433static int range_write_helper(void *key, void *data, void *ptr)
3434{
3435 __le32 buf[2];
3436 struct range_trans *rt = key;
3437 struct mls_range *r = data;
3438 struct policy_data *pd = ptr;
3439 void *fp = pd->fp;
3440 struct policydb *p = pd->p;
3441 int rc;
3442
3443 buf[0] = cpu_to_le32(rt->source_type);
3444 buf[1] = cpu_to_le32(rt->target_type);
3445 rc = put_entry(buf, sizeof(u32), 2, fp);
3446 if (rc)
3447 return rc;
3448 if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
3449 buf[0] = cpu_to_le32(rt->target_class);
3450 rc = put_entry(buf, sizeof(u32), 1, fp);
3451 if (rc)
3452 return rc;
3453 }
3454 rc = mls_write_range_helper(r, fp);
3455 if (rc)
3456 return rc;
3457
3458 return 0;
3459}
3460
3461static int range_write(struct policydb *p, void *fp)
3462{
3463 __le32 buf[1];
3464 int rc;
3465 struct policy_data pd;
3466
3467 pd.p = p;
3468 pd.fp = fp;
3469
3470 buf[0] = cpu_to_le32(p->range_tr.nel);
3471 rc = put_entry(buf, sizeof(u32), 1, fp);
3472 if (rc)
3473 return rc;
3474
3475 /* actually write all of the entries */
3476 rc = hashtab_map(&p->range_tr, range_write_helper, &pd);
3477 if (rc)
3478 return rc;
3479
3480 return 0;
3481}
3482
3483static int filename_write_helper_compat(void *key, void *data, void *ptr)
3484{
3485 struct filename_trans_key *ft = key;
3486 struct filename_trans_datum *datum = data;
3487 struct ebitmap_node *node;
3488 void *fp = ptr;
3489 __le32 buf[4];
3490 int rc;
3491 u32 bit, len = strlen(ft->name);
3492
3493 do {
3494 ebitmap_for_each_positive_bit(&datum->stypes, node, bit) {
3495 buf[0] = cpu_to_le32(len);
3496 rc = put_entry(buf, sizeof(u32), 1, fp);
3497 if (rc)
3498 return rc;
3499
3500 rc = put_entry(ft->name, sizeof(char), len, fp);
3501 if (rc)
3502 return rc;
3503
3504 buf[0] = cpu_to_le32(bit + 1);
3505 buf[1] = cpu_to_le32(ft->ttype);
3506 buf[2] = cpu_to_le32(ft->tclass);
3507 buf[3] = cpu_to_le32(datum->otype);
3508
3509 rc = put_entry(buf, sizeof(u32), 4, fp);
3510 if (rc)
3511 return rc;
3512 }
3513
3514 datum = datum->next;
3515 } while (unlikely(datum));
3516
3517 return 0;
3518}
3519
3520static int filename_write_helper(void *key, void *data, void *ptr)
3521{
3522 struct filename_trans_key *ft = key;
3523 struct filename_trans_datum *datum;
3524 void *fp = ptr;
3525 __le32 buf[3];
3526 int rc;
3527 u32 ndatum, len = strlen(ft->name);
3528
3529 buf[0] = cpu_to_le32(len);
3530 rc = put_entry(buf, sizeof(u32), 1, fp);
3531 if (rc)
3532 return rc;
3533
3534 rc = put_entry(ft->name, sizeof(char), len, fp);
3535 if (rc)
3536 return rc;
3537
3538 ndatum = 0;
3539 datum = data;
3540 do {
3541 ndatum++;
3542 datum = datum->next;
3543 } while (unlikely(datum));
3544
3545 buf[0] = cpu_to_le32(ft->ttype);
3546 buf[1] = cpu_to_le32(ft->tclass);
3547 buf[2] = cpu_to_le32(ndatum);
3548 rc = put_entry(buf, sizeof(u32), 3, fp);
3549 if (rc)
3550 return rc;
3551
3552 datum = data;
3553 do {
3554 rc = ebitmap_write(&datum->stypes, fp);
3555 if (rc)
3556 return rc;
3557
3558 buf[0] = cpu_to_le32(datum->otype);
3559 rc = put_entry(buf, sizeof(u32), 1, fp);
3560 if (rc)
3561 return rc;
3562
3563 datum = datum->next;
3564 } while (unlikely(datum));
3565
3566 return 0;
3567}
3568
3569static int filename_trans_write(struct policydb *p, void *fp)
3570{
3571 __le32 buf[1];
3572 int rc;
3573
3574 if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
3575 return 0;
3576
3577 if (p->policyvers < POLICYDB_VERSION_COMP_FTRANS) {
3578 buf[0] = cpu_to_le32(p->compat_filename_trans_count);
3579 rc = put_entry(buf, sizeof(u32), 1, fp);
3580 if (rc)
3581 return rc;
3582
3583 rc = hashtab_map(&p->filename_trans,
3584 filename_write_helper_compat, fp);
3585 } else {
3586 buf[0] = cpu_to_le32(p->filename_trans.nel);
3587 rc = put_entry(buf, sizeof(u32), 1, fp);
3588 if (rc)
3589 return rc;
3590
3591 rc = hashtab_map(&p->filename_trans, filename_write_helper, fp);
3592 }
3593 return rc;
3594}
3595
3596/*
3597 * Write the configuration data in a policy database
3598 * structure to a policy database binary representation
3599 * file.
3600 */
3601int policydb_write(struct policydb *p, void *fp)
3602{
3603 unsigned int i, num_syms;
3604 int rc;
3605 __le32 buf[4];
3606 u32 config;
3607 size_t len;
3608 const struct policydb_compat_info *info;
3609
3610 /*
3611 * refuse to write policy older than compressed avtab
3612 * to simplify the writer. There are other tests dropped
3613 * since we assume this throughout the writer code. Be
3614 * careful if you ever try to remove this restriction
3615 */
3616 if (p->policyvers < POLICYDB_VERSION_AVTAB) {
3617 pr_err("SELinux: refusing to write policy version %d."
3618 " Because it is less than version %d\n", p->policyvers,
3619 POLICYDB_VERSION_AVTAB);
3620 return -EINVAL;
3621 }
3622
3623 config = 0;
3624 if (p->mls_enabled)
3625 config |= POLICYDB_CONFIG_MLS;
3626
3627 if (p->reject_unknown)
3628 config |= REJECT_UNKNOWN;
3629 if (p->allow_unknown)
3630 config |= ALLOW_UNKNOWN;
3631
3632 /* Write the magic number and string identifiers. */
3633 buf[0] = cpu_to_le32(POLICYDB_MAGIC);
3634 len = strlen(POLICYDB_STRING);
3635 buf[1] = cpu_to_le32(len);
3636 rc = put_entry(buf, sizeof(u32), 2, fp);
3637 if (rc)
3638 return rc;
3639 rc = put_entry(POLICYDB_STRING, 1, len, fp);
3640 if (rc)
3641 return rc;
3642
3643 /* Write the version, config, and table sizes. */
3644 info = policydb_lookup_compat(p->policyvers);
3645 if (!info) {
3646 pr_err("SELinux: compatibility lookup failed for policy "
3647 "version %d", p->policyvers);
3648 return -EINVAL;
3649 }
3650
3651 buf[0] = cpu_to_le32(p->policyvers);
3652 buf[1] = cpu_to_le32(config);
3653 buf[2] = cpu_to_le32(info->sym_num);
3654 buf[3] = cpu_to_le32(info->ocon_num);
3655
3656 rc = put_entry(buf, sizeof(u32), 4, fp);
3657 if (rc)
3658 return rc;
3659
3660 if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
3661 rc = ebitmap_write(&p->policycaps, fp);
3662 if (rc)
3663 return rc;
3664 }
3665
3666 if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
3667 rc = ebitmap_write(&p->permissive_map, fp);
3668 if (rc)
3669 return rc;
3670 }
3671
3672 num_syms = info->sym_num;
3673 for (i = 0; i < num_syms; i++) {
3674 struct policy_data pd;
3675
3676 pd.fp = fp;
3677 pd.p = p;
3678
3679 buf[0] = cpu_to_le32(p->symtab[i].nprim);
3680 buf[1] = cpu_to_le32(p->symtab[i].table.nel);
3681
3682 rc = put_entry(buf, sizeof(u32), 2, fp);
3683 if (rc)
3684 return rc;
3685 rc = hashtab_map(&p->symtab[i].table, write_f[i], &pd);
3686 if (rc)
3687 return rc;
3688 }
3689
3690 rc = avtab_write(p, &p->te_avtab, fp);
3691 if (rc)
3692 return rc;
3693
3694 rc = cond_write_list(p, fp);
3695 if (rc)
3696 return rc;
3697
3698 rc = role_trans_write(p, fp);
3699 if (rc)
3700 return rc;
3701
3702 rc = role_allow_write(p->role_allow, fp);
3703 if (rc)
3704 return rc;
3705
3706 rc = filename_trans_write(p, fp);
3707 if (rc)
3708 return rc;
3709
3710 rc = ocontext_write(p, info, fp);
3711 if (rc)
3712 return rc;
3713
3714 rc = genfs_write(p, fp);
3715 if (rc)
3716 return rc;
3717
3718 rc = range_write(p, fp);
3719 if (rc)
3720 return rc;
3721
3722 for (i = 0; i < p->p_types.nprim; i++) {
3723 struct ebitmap *e = &p->type_attr_map_array[i];
3724
3725 rc = ebitmap_write(e, fp);
3726 if (rc)
3727 return rc;
3728 }
3729
3730 return 0;
3731}
1/*
2 * Implementation of the policy database.
3 *
4 * Author : Stephen Smalley, <sds@epoch.ncsc.mil>
5 */
6
7/*
8 * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
9 *
10 * Support for enhanced MLS infrastructure.
11 *
12 * Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com>
13 *
14 * Added conditional policy language extensions
15 *
16 * Updated: Hewlett-Packard <paul@paul-moore.com>
17 *
18 * Added support for the policy capability bitmap
19 *
20 * Copyright (C) 2007 Hewlett-Packard Development Company, L.P.
21 * Copyright (C) 2004-2005 Trusted Computer Solutions, Inc.
22 * Copyright (C) 2003 - 2004 Tresys Technology, LLC
23 * This program is free software; you can redistribute it and/or modify
24 * it under the terms of the GNU General Public License as published by
25 * the Free Software Foundation, version 2.
26 */
27
28#include <linux/kernel.h>
29#include <linux/sched.h>
30#include <linux/slab.h>
31#include <linux/string.h>
32#include <linux/errno.h>
33#include <linux/audit.h>
34#include <linux/flex_array.h>
35#include "security.h"
36
37#include "policydb.h"
38#include "conditional.h"
39#include "mls.h"
40#include "services.h"
41
42#define _DEBUG_HASHES
43
44#ifdef DEBUG_HASHES
45static const char *symtab_name[SYM_NUM] = {
46 "common prefixes",
47 "classes",
48 "roles",
49 "types",
50 "users",
51 "bools",
52 "levels",
53 "categories",
54};
55#endif
56
57static unsigned int symtab_sizes[SYM_NUM] = {
58 2,
59 32,
60 16,
61 512,
62 128,
63 16,
64 16,
65 16,
66};
67
68struct policydb_compat_info {
69 int version;
70 int sym_num;
71 int ocon_num;
72};
73
74/* These need to be updated if SYM_NUM or OCON_NUM changes */
75static struct policydb_compat_info policydb_compat[] = {
76 {
77 .version = POLICYDB_VERSION_BASE,
78 .sym_num = SYM_NUM - 3,
79 .ocon_num = OCON_NUM - 1,
80 },
81 {
82 .version = POLICYDB_VERSION_BOOL,
83 .sym_num = SYM_NUM - 2,
84 .ocon_num = OCON_NUM - 1,
85 },
86 {
87 .version = POLICYDB_VERSION_IPV6,
88 .sym_num = SYM_NUM - 2,
89 .ocon_num = OCON_NUM,
90 },
91 {
92 .version = POLICYDB_VERSION_NLCLASS,
93 .sym_num = SYM_NUM - 2,
94 .ocon_num = OCON_NUM,
95 },
96 {
97 .version = POLICYDB_VERSION_MLS,
98 .sym_num = SYM_NUM,
99 .ocon_num = OCON_NUM,
100 },
101 {
102 .version = POLICYDB_VERSION_AVTAB,
103 .sym_num = SYM_NUM,
104 .ocon_num = OCON_NUM,
105 },
106 {
107 .version = POLICYDB_VERSION_RANGETRANS,
108 .sym_num = SYM_NUM,
109 .ocon_num = OCON_NUM,
110 },
111 {
112 .version = POLICYDB_VERSION_POLCAP,
113 .sym_num = SYM_NUM,
114 .ocon_num = OCON_NUM,
115 },
116 {
117 .version = POLICYDB_VERSION_PERMISSIVE,
118 .sym_num = SYM_NUM,
119 .ocon_num = OCON_NUM,
120 },
121 {
122 .version = POLICYDB_VERSION_BOUNDARY,
123 .sym_num = SYM_NUM,
124 .ocon_num = OCON_NUM,
125 },
126 {
127 .version = POLICYDB_VERSION_FILENAME_TRANS,
128 .sym_num = SYM_NUM,
129 .ocon_num = OCON_NUM,
130 },
131 {
132 .version = POLICYDB_VERSION_ROLETRANS,
133 .sym_num = SYM_NUM,
134 .ocon_num = OCON_NUM,
135 },
136};
137
138static struct policydb_compat_info *policydb_lookup_compat(int version)
139{
140 int i;
141 struct policydb_compat_info *info = NULL;
142
143 for (i = 0; i < ARRAY_SIZE(policydb_compat); i++) {
144 if (policydb_compat[i].version == version) {
145 info = &policydb_compat[i];
146 break;
147 }
148 }
149 return info;
150}
151
152/*
153 * Initialize the role table.
154 */
155static int roles_init(struct policydb *p)
156{
157 char *key = NULL;
158 int rc;
159 struct role_datum *role;
160
161 rc = -ENOMEM;
162 role = kzalloc(sizeof(*role), GFP_KERNEL);
163 if (!role)
164 goto out;
165
166 rc = -EINVAL;
167 role->value = ++p->p_roles.nprim;
168 if (role->value != OBJECT_R_VAL)
169 goto out;
170
171 rc = -ENOMEM;
172 key = kstrdup(OBJECT_R, GFP_KERNEL);
173 if (!key)
174 goto out;
175
176 rc = hashtab_insert(p->p_roles.table, key, role);
177 if (rc)
178 goto out;
179
180 return 0;
181out:
182 kfree(key);
183 kfree(role);
184 return rc;
185}
186
187static u32 filenametr_hash(struct hashtab *h, const void *k)
188{
189 const struct filename_trans *ft = k;
190 unsigned long hash;
191 unsigned int byte_num;
192 unsigned char focus;
193
194 hash = ft->stype ^ ft->ttype ^ ft->tclass;
195
196 byte_num = 0;
197 while ((focus = ft->name[byte_num++]))
198 hash = partial_name_hash(focus, hash);
199 return hash & (h->size - 1);
200}
201
202static int filenametr_cmp(struct hashtab *h, const void *k1, const void *k2)
203{
204 const struct filename_trans *ft1 = k1;
205 const struct filename_trans *ft2 = k2;
206 int v;
207
208 v = ft1->stype - ft2->stype;
209 if (v)
210 return v;
211
212 v = ft1->ttype - ft2->ttype;
213 if (v)
214 return v;
215
216 v = ft1->tclass - ft2->tclass;
217 if (v)
218 return v;
219
220 return strcmp(ft1->name, ft2->name);
221
222}
223
224static u32 rangetr_hash(struct hashtab *h, const void *k)
225{
226 const struct range_trans *key = k;
227 return (key->source_type + (key->target_type << 3) +
228 (key->target_class << 5)) & (h->size - 1);
229}
230
231static int rangetr_cmp(struct hashtab *h, const void *k1, const void *k2)
232{
233 const struct range_trans *key1 = k1, *key2 = k2;
234 int v;
235
236 v = key1->source_type - key2->source_type;
237 if (v)
238 return v;
239
240 v = key1->target_type - key2->target_type;
241 if (v)
242 return v;
243
244 v = key1->target_class - key2->target_class;
245
246 return v;
247}
248
249/*
250 * Initialize a policy database structure.
251 */
252static int policydb_init(struct policydb *p)
253{
254 int i, rc;
255
256 memset(p, 0, sizeof(*p));
257
258 for (i = 0; i < SYM_NUM; i++) {
259 rc = symtab_init(&p->symtab[i], symtab_sizes[i]);
260 if (rc)
261 goto out;
262 }
263
264 rc = avtab_init(&p->te_avtab);
265 if (rc)
266 goto out;
267
268 rc = roles_init(p);
269 if (rc)
270 goto out;
271
272 rc = cond_policydb_init(p);
273 if (rc)
274 goto out;
275
276 p->filename_trans = hashtab_create(filenametr_hash, filenametr_cmp, (1 << 10));
277 if (!p->filename_trans)
278 goto out;
279
280 p->range_tr = hashtab_create(rangetr_hash, rangetr_cmp, 256);
281 if (!p->range_tr)
282 goto out;
283
284 ebitmap_init(&p->filename_trans_ttypes);
285 ebitmap_init(&p->policycaps);
286 ebitmap_init(&p->permissive_map);
287
288 return 0;
289out:
290 hashtab_destroy(p->filename_trans);
291 hashtab_destroy(p->range_tr);
292 for (i = 0; i < SYM_NUM; i++)
293 hashtab_destroy(p->symtab[i].table);
294 return rc;
295}
296
297/*
298 * The following *_index functions are used to
299 * define the val_to_name and val_to_struct arrays
300 * in a policy database structure. The val_to_name
301 * arrays are used when converting security context
302 * structures into string representations. The
303 * val_to_struct arrays are used when the attributes
304 * of a class, role, or user are needed.
305 */
306
307static int common_index(void *key, void *datum, void *datap)
308{
309 struct policydb *p;
310 struct common_datum *comdatum;
311 struct flex_array *fa;
312
313 comdatum = datum;
314 p = datap;
315 if (!comdatum->value || comdatum->value > p->p_commons.nprim)
316 return -EINVAL;
317
318 fa = p->sym_val_to_name[SYM_COMMONS];
319 if (flex_array_put_ptr(fa, comdatum->value - 1, key,
320 GFP_KERNEL | __GFP_ZERO))
321 BUG();
322 return 0;
323}
324
325static int class_index(void *key, void *datum, void *datap)
326{
327 struct policydb *p;
328 struct class_datum *cladatum;
329 struct flex_array *fa;
330
331 cladatum = datum;
332 p = datap;
333 if (!cladatum->value || cladatum->value > p->p_classes.nprim)
334 return -EINVAL;
335 fa = p->sym_val_to_name[SYM_CLASSES];
336 if (flex_array_put_ptr(fa, cladatum->value - 1, key,
337 GFP_KERNEL | __GFP_ZERO))
338 BUG();
339 p->class_val_to_struct[cladatum->value - 1] = cladatum;
340 return 0;
341}
342
343static int role_index(void *key, void *datum, void *datap)
344{
345 struct policydb *p;
346 struct role_datum *role;
347 struct flex_array *fa;
348
349 role = datum;
350 p = datap;
351 if (!role->value
352 || role->value > p->p_roles.nprim
353 || role->bounds > p->p_roles.nprim)
354 return -EINVAL;
355
356 fa = p->sym_val_to_name[SYM_ROLES];
357 if (flex_array_put_ptr(fa, role->value - 1, key,
358 GFP_KERNEL | __GFP_ZERO))
359 BUG();
360 p->role_val_to_struct[role->value - 1] = role;
361 return 0;
362}
363
364static int type_index(void *key, void *datum, void *datap)
365{
366 struct policydb *p;
367 struct type_datum *typdatum;
368 struct flex_array *fa;
369
370 typdatum = datum;
371 p = datap;
372
373 if (typdatum->primary) {
374 if (!typdatum->value
375 || typdatum->value > p->p_types.nprim
376 || typdatum->bounds > p->p_types.nprim)
377 return -EINVAL;
378 fa = p->sym_val_to_name[SYM_TYPES];
379 if (flex_array_put_ptr(fa, typdatum->value - 1, key,
380 GFP_KERNEL | __GFP_ZERO))
381 BUG();
382
383 fa = p->type_val_to_struct_array;
384 if (flex_array_put_ptr(fa, typdatum->value - 1, typdatum,
385 GFP_KERNEL | __GFP_ZERO))
386 BUG();
387 }
388
389 return 0;
390}
391
392static int user_index(void *key, void *datum, void *datap)
393{
394 struct policydb *p;
395 struct user_datum *usrdatum;
396 struct flex_array *fa;
397
398 usrdatum = datum;
399 p = datap;
400 if (!usrdatum->value
401 || usrdatum->value > p->p_users.nprim
402 || usrdatum->bounds > p->p_users.nprim)
403 return -EINVAL;
404
405 fa = p->sym_val_to_name[SYM_USERS];
406 if (flex_array_put_ptr(fa, usrdatum->value - 1, key,
407 GFP_KERNEL | __GFP_ZERO))
408 BUG();
409 p->user_val_to_struct[usrdatum->value - 1] = usrdatum;
410 return 0;
411}
412
413static int sens_index(void *key, void *datum, void *datap)
414{
415 struct policydb *p;
416 struct level_datum *levdatum;
417 struct flex_array *fa;
418
419 levdatum = datum;
420 p = datap;
421
422 if (!levdatum->isalias) {
423 if (!levdatum->level->sens ||
424 levdatum->level->sens > p->p_levels.nprim)
425 return -EINVAL;
426 fa = p->sym_val_to_name[SYM_LEVELS];
427 if (flex_array_put_ptr(fa, levdatum->level->sens - 1, key,
428 GFP_KERNEL | __GFP_ZERO))
429 BUG();
430 }
431
432 return 0;
433}
434
435static int cat_index(void *key, void *datum, void *datap)
436{
437 struct policydb *p;
438 struct cat_datum *catdatum;
439 struct flex_array *fa;
440
441 catdatum = datum;
442 p = datap;
443
444 if (!catdatum->isalias) {
445 if (!catdatum->value || catdatum->value > p->p_cats.nprim)
446 return -EINVAL;
447 fa = p->sym_val_to_name[SYM_CATS];
448 if (flex_array_put_ptr(fa, catdatum->value - 1, key,
449 GFP_KERNEL | __GFP_ZERO))
450 BUG();
451 }
452
453 return 0;
454}
455
456static int (*index_f[SYM_NUM]) (void *key, void *datum, void *datap) =
457{
458 common_index,
459 class_index,
460 role_index,
461 type_index,
462 user_index,
463 cond_index_bool,
464 sens_index,
465 cat_index,
466};
467
468#ifdef DEBUG_HASHES
469static void hash_eval(struct hashtab *h, const char *hash_name)
470{
471 struct hashtab_info info;
472
473 hashtab_stat(h, &info);
474 printk(KERN_DEBUG "SELinux: %s: %d entries and %d/%d buckets used, "
475 "longest chain length %d\n", hash_name, h->nel,
476 info.slots_used, h->size, info.max_chain_len);
477}
478
479static void symtab_hash_eval(struct symtab *s)
480{
481 int i;
482
483 for (i = 0; i < SYM_NUM; i++)
484 hash_eval(s[i].table, symtab_name[i]);
485}
486
487#else
488static inline void hash_eval(struct hashtab *h, char *hash_name)
489{
490}
491#endif
492
493/*
494 * Define the other val_to_name and val_to_struct arrays
495 * in a policy database structure.
496 *
497 * Caller must clean up on failure.
498 */
499static int policydb_index(struct policydb *p)
500{
501 int i, rc;
502
503 printk(KERN_DEBUG "SELinux: %d users, %d roles, %d types, %d bools",
504 p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim, p->p_bools.nprim);
505 if (p->mls_enabled)
506 printk(", %d sens, %d cats", p->p_levels.nprim,
507 p->p_cats.nprim);
508 printk("\n");
509
510 printk(KERN_DEBUG "SELinux: %d classes, %d rules\n",
511 p->p_classes.nprim, p->te_avtab.nel);
512
513#ifdef DEBUG_HASHES
514 avtab_hash_eval(&p->te_avtab, "rules");
515 symtab_hash_eval(p->symtab);
516#endif
517
518 rc = -ENOMEM;
519 p->class_val_to_struct =
520 kmalloc(p->p_classes.nprim * sizeof(*(p->class_val_to_struct)),
521 GFP_KERNEL);
522 if (!p->class_val_to_struct)
523 goto out;
524
525 rc = -ENOMEM;
526 p->role_val_to_struct =
527 kmalloc(p->p_roles.nprim * sizeof(*(p->role_val_to_struct)),
528 GFP_KERNEL);
529 if (!p->role_val_to_struct)
530 goto out;
531
532 rc = -ENOMEM;
533 p->user_val_to_struct =
534 kmalloc(p->p_users.nprim * sizeof(*(p->user_val_to_struct)),
535 GFP_KERNEL);
536 if (!p->user_val_to_struct)
537 goto out;
538
539 /* Yes, I want the sizeof the pointer, not the structure */
540 rc = -ENOMEM;
541 p->type_val_to_struct_array = flex_array_alloc(sizeof(struct type_datum *),
542 p->p_types.nprim,
543 GFP_KERNEL | __GFP_ZERO);
544 if (!p->type_val_to_struct_array)
545 goto out;
546
547 rc = flex_array_prealloc(p->type_val_to_struct_array, 0,
548 p->p_types.nprim, GFP_KERNEL | __GFP_ZERO);
549 if (rc)
550 goto out;
551
552 rc = cond_init_bool_indexes(p);
553 if (rc)
554 goto out;
555
556 for (i = 0; i < SYM_NUM; i++) {
557 rc = -ENOMEM;
558 p->sym_val_to_name[i] = flex_array_alloc(sizeof(char *),
559 p->symtab[i].nprim,
560 GFP_KERNEL | __GFP_ZERO);
561 if (!p->sym_val_to_name[i])
562 goto out;
563
564 rc = flex_array_prealloc(p->sym_val_to_name[i],
565 0, p->symtab[i].nprim,
566 GFP_KERNEL | __GFP_ZERO);
567 if (rc)
568 goto out;
569
570 rc = hashtab_map(p->symtab[i].table, index_f[i], p);
571 if (rc)
572 goto out;
573 }
574 rc = 0;
575out:
576 return rc;
577}
578
579/*
580 * The following *_destroy functions are used to
581 * free any memory allocated for each kind of
582 * symbol data in the policy database.
583 */
584
585static int perm_destroy(void *key, void *datum, void *p)
586{
587 kfree(key);
588 kfree(datum);
589 return 0;
590}
591
592static int common_destroy(void *key, void *datum, void *p)
593{
594 struct common_datum *comdatum;
595
596 kfree(key);
597 if (datum) {
598 comdatum = datum;
599 hashtab_map(comdatum->permissions.table, perm_destroy, NULL);
600 hashtab_destroy(comdatum->permissions.table);
601 }
602 kfree(datum);
603 return 0;
604}
605
606static int cls_destroy(void *key, void *datum, void *p)
607{
608 struct class_datum *cladatum;
609 struct constraint_node *constraint, *ctemp;
610 struct constraint_expr *e, *etmp;
611
612 kfree(key);
613 if (datum) {
614 cladatum = datum;
615 hashtab_map(cladatum->permissions.table, perm_destroy, NULL);
616 hashtab_destroy(cladatum->permissions.table);
617 constraint = cladatum->constraints;
618 while (constraint) {
619 e = constraint->expr;
620 while (e) {
621 ebitmap_destroy(&e->names);
622 etmp = e;
623 e = e->next;
624 kfree(etmp);
625 }
626 ctemp = constraint;
627 constraint = constraint->next;
628 kfree(ctemp);
629 }
630
631 constraint = cladatum->validatetrans;
632 while (constraint) {
633 e = constraint->expr;
634 while (e) {
635 ebitmap_destroy(&e->names);
636 etmp = e;
637 e = e->next;
638 kfree(etmp);
639 }
640 ctemp = constraint;
641 constraint = constraint->next;
642 kfree(ctemp);
643 }
644
645 kfree(cladatum->comkey);
646 }
647 kfree(datum);
648 return 0;
649}
650
651static int role_destroy(void *key, void *datum, void *p)
652{
653 struct role_datum *role;
654
655 kfree(key);
656 if (datum) {
657 role = datum;
658 ebitmap_destroy(&role->dominates);
659 ebitmap_destroy(&role->types);
660 }
661 kfree(datum);
662 return 0;
663}
664
665static int type_destroy(void *key, void *datum, void *p)
666{
667 kfree(key);
668 kfree(datum);
669 return 0;
670}
671
672static int user_destroy(void *key, void *datum, void *p)
673{
674 struct user_datum *usrdatum;
675
676 kfree(key);
677 if (datum) {
678 usrdatum = datum;
679 ebitmap_destroy(&usrdatum->roles);
680 ebitmap_destroy(&usrdatum->range.level[0].cat);
681 ebitmap_destroy(&usrdatum->range.level[1].cat);
682 ebitmap_destroy(&usrdatum->dfltlevel.cat);
683 }
684 kfree(datum);
685 return 0;
686}
687
688static int sens_destroy(void *key, void *datum, void *p)
689{
690 struct level_datum *levdatum;
691
692 kfree(key);
693 if (datum) {
694 levdatum = datum;
695 ebitmap_destroy(&levdatum->level->cat);
696 kfree(levdatum->level);
697 }
698 kfree(datum);
699 return 0;
700}
701
702static int cat_destroy(void *key, void *datum, void *p)
703{
704 kfree(key);
705 kfree(datum);
706 return 0;
707}
708
709static int (*destroy_f[SYM_NUM]) (void *key, void *datum, void *datap) =
710{
711 common_destroy,
712 cls_destroy,
713 role_destroy,
714 type_destroy,
715 user_destroy,
716 cond_destroy_bool,
717 sens_destroy,
718 cat_destroy,
719};
720
721static int filenametr_destroy(void *key, void *datum, void *p)
722{
723 struct filename_trans *ft = key;
724 kfree(ft->name);
725 kfree(key);
726 kfree(datum);
727 cond_resched();
728 return 0;
729}
730
731static int range_tr_destroy(void *key, void *datum, void *p)
732{
733 struct mls_range *rt = datum;
734 kfree(key);
735 ebitmap_destroy(&rt->level[0].cat);
736 ebitmap_destroy(&rt->level[1].cat);
737 kfree(datum);
738 cond_resched();
739 return 0;
740}
741
742static void ocontext_destroy(struct ocontext *c, int i)
743{
744 if (!c)
745 return;
746
747 context_destroy(&c->context[0]);
748 context_destroy(&c->context[1]);
749 if (i == OCON_ISID || i == OCON_FS ||
750 i == OCON_NETIF || i == OCON_FSUSE)
751 kfree(c->u.name);
752 kfree(c);
753}
754
755/*
756 * Free any memory allocated by a policy database structure.
757 */
758void policydb_destroy(struct policydb *p)
759{
760 struct ocontext *c, *ctmp;
761 struct genfs *g, *gtmp;
762 int i;
763 struct role_allow *ra, *lra = NULL;
764 struct role_trans *tr, *ltr = NULL;
765
766 for (i = 0; i < SYM_NUM; i++) {
767 cond_resched();
768 hashtab_map(p->symtab[i].table, destroy_f[i], NULL);
769 hashtab_destroy(p->symtab[i].table);
770 }
771
772 for (i = 0; i < SYM_NUM; i++) {
773 if (p->sym_val_to_name[i])
774 flex_array_free(p->sym_val_to_name[i]);
775 }
776
777 kfree(p->class_val_to_struct);
778 kfree(p->role_val_to_struct);
779 kfree(p->user_val_to_struct);
780 if (p->type_val_to_struct_array)
781 flex_array_free(p->type_val_to_struct_array);
782
783 avtab_destroy(&p->te_avtab);
784
785 for (i = 0; i < OCON_NUM; i++) {
786 cond_resched();
787 c = p->ocontexts[i];
788 while (c) {
789 ctmp = c;
790 c = c->next;
791 ocontext_destroy(ctmp, i);
792 }
793 p->ocontexts[i] = NULL;
794 }
795
796 g = p->genfs;
797 while (g) {
798 cond_resched();
799 kfree(g->fstype);
800 c = g->head;
801 while (c) {
802 ctmp = c;
803 c = c->next;
804 ocontext_destroy(ctmp, OCON_FSUSE);
805 }
806 gtmp = g;
807 g = g->next;
808 kfree(gtmp);
809 }
810 p->genfs = NULL;
811
812 cond_policydb_destroy(p);
813
814 for (tr = p->role_tr; tr; tr = tr->next) {
815 cond_resched();
816 kfree(ltr);
817 ltr = tr;
818 }
819 kfree(ltr);
820
821 for (ra = p->role_allow; ra; ra = ra->next) {
822 cond_resched();
823 kfree(lra);
824 lra = ra;
825 }
826 kfree(lra);
827
828 hashtab_map(p->filename_trans, filenametr_destroy, NULL);
829 hashtab_destroy(p->filename_trans);
830
831 hashtab_map(p->range_tr, range_tr_destroy, NULL);
832 hashtab_destroy(p->range_tr);
833
834 if (p->type_attr_map_array) {
835 for (i = 0; i < p->p_types.nprim; i++) {
836 struct ebitmap *e;
837
838 e = flex_array_get(p->type_attr_map_array, i);
839 if (!e)
840 continue;
841 ebitmap_destroy(e);
842 }
843 flex_array_free(p->type_attr_map_array);
844 }
845
846 ebitmap_destroy(&p->filename_trans_ttypes);
847 ebitmap_destroy(&p->policycaps);
848 ebitmap_destroy(&p->permissive_map);
849
850 return;
851}
852
853/*
854 * Load the initial SIDs specified in a policy database
855 * structure into a SID table.
856 */
857int policydb_load_isids(struct policydb *p, struct sidtab *s)
858{
859 struct ocontext *head, *c;
860 int rc;
861
862 rc = sidtab_init(s);
863 if (rc) {
864 printk(KERN_ERR "SELinux: out of memory on SID table init\n");
865 goto out;
866 }
867
868 head = p->ocontexts[OCON_ISID];
869 for (c = head; c; c = c->next) {
870 rc = -EINVAL;
871 if (!c->context[0].user) {
872 printk(KERN_ERR "SELinux: SID %s was never defined.\n",
873 c->u.name);
874 goto out;
875 }
876
877 rc = sidtab_insert(s, c->sid[0], &c->context[0]);
878 if (rc) {
879 printk(KERN_ERR "SELinux: unable to load initial SID %s.\n",
880 c->u.name);
881 goto out;
882 }
883 }
884 rc = 0;
885out:
886 return rc;
887}
888
889int policydb_class_isvalid(struct policydb *p, unsigned int class)
890{
891 if (!class || class > p->p_classes.nprim)
892 return 0;
893 return 1;
894}
895
896int policydb_role_isvalid(struct policydb *p, unsigned int role)
897{
898 if (!role || role > p->p_roles.nprim)
899 return 0;
900 return 1;
901}
902
903int policydb_type_isvalid(struct policydb *p, unsigned int type)
904{
905 if (!type || type > p->p_types.nprim)
906 return 0;
907 return 1;
908}
909
910/*
911 * Return 1 if the fields in the security context
912 * structure `c' are valid. Return 0 otherwise.
913 */
914int policydb_context_isvalid(struct policydb *p, struct context *c)
915{
916 struct role_datum *role;
917 struct user_datum *usrdatum;
918
919 if (!c->role || c->role > p->p_roles.nprim)
920 return 0;
921
922 if (!c->user || c->user > p->p_users.nprim)
923 return 0;
924
925 if (!c->type || c->type > p->p_types.nprim)
926 return 0;
927
928 if (c->role != OBJECT_R_VAL) {
929 /*
930 * Role must be authorized for the type.
931 */
932 role = p->role_val_to_struct[c->role - 1];
933 if (!ebitmap_get_bit(&role->types, c->type - 1))
934 /* role may not be associated with type */
935 return 0;
936
937 /*
938 * User must be authorized for the role.
939 */
940 usrdatum = p->user_val_to_struct[c->user - 1];
941 if (!usrdatum)
942 return 0;
943
944 if (!ebitmap_get_bit(&usrdatum->roles, c->role - 1))
945 /* user may not be associated with role */
946 return 0;
947 }
948
949 if (!mls_context_isvalid(p, c))
950 return 0;
951
952 return 1;
953}
954
955/*
956 * Read a MLS range structure from a policydb binary
957 * representation file.
958 */
959static int mls_read_range_helper(struct mls_range *r, void *fp)
960{
961 __le32 buf[2];
962 u32 items;
963 int rc;
964
965 rc = next_entry(buf, fp, sizeof(u32));
966 if (rc)
967 goto out;
968
969 rc = -EINVAL;
970 items = le32_to_cpu(buf[0]);
971 if (items > ARRAY_SIZE(buf)) {
972 printk(KERN_ERR "SELinux: mls: range overflow\n");
973 goto out;
974 }
975
976 rc = next_entry(buf, fp, sizeof(u32) * items);
977 if (rc) {
978 printk(KERN_ERR "SELinux: mls: truncated range\n");
979 goto out;
980 }
981
982 r->level[0].sens = le32_to_cpu(buf[0]);
983 if (items > 1)
984 r->level[1].sens = le32_to_cpu(buf[1]);
985 else
986 r->level[1].sens = r->level[0].sens;
987
988 rc = ebitmap_read(&r->level[0].cat, fp);
989 if (rc) {
990 printk(KERN_ERR "SELinux: mls: error reading low categories\n");
991 goto out;
992 }
993 if (items > 1) {
994 rc = ebitmap_read(&r->level[1].cat, fp);
995 if (rc) {
996 printk(KERN_ERR "SELinux: mls: error reading high categories\n");
997 goto bad_high;
998 }
999 } else {
1000 rc = ebitmap_cpy(&r->level[1].cat, &r->level[0].cat);
1001 if (rc) {
1002 printk(KERN_ERR "SELinux: mls: out of memory\n");
1003 goto bad_high;
1004 }
1005 }
1006
1007 return 0;
1008bad_high:
1009 ebitmap_destroy(&r->level[0].cat);
1010out:
1011 return rc;
1012}
1013
1014/*
1015 * Read and validate a security context structure
1016 * from a policydb binary representation file.
1017 */
1018static int context_read_and_validate(struct context *c,
1019 struct policydb *p,
1020 void *fp)
1021{
1022 __le32 buf[3];
1023 int rc;
1024
1025 rc = next_entry(buf, fp, sizeof buf);
1026 if (rc) {
1027 printk(KERN_ERR "SELinux: context truncated\n");
1028 goto out;
1029 }
1030 c->user = le32_to_cpu(buf[0]);
1031 c->role = le32_to_cpu(buf[1]);
1032 c->type = le32_to_cpu(buf[2]);
1033 if (p->policyvers >= POLICYDB_VERSION_MLS) {
1034 rc = mls_read_range_helper(&c->range, fp);
1035 if (rc) {
1036 printk(KERN_ERR "SELinux: error reading MLS range of context\n");
1037 goto out;
1038 }
1039 }
1040
1041 rc = -EINVAL;
1042 if (!policydb_context_isvalid(p, c)) {
1043 printk(KERN_ERR "SELinux: invalid security context\n");
1044 context_destroy(c);
1045 goto out;
1046 }
1047 rc = 0;
1048out:
1049 return rc;
1050}
1051
1052/*
1053 * The following *_read functions are used to
1054 * read the symbol data from a policy database
1055 * binary representation file.
1056 */
1057
1058static int perm_read(struct policydb *p, struct hashtab *h, void *fp)
1059{
1060 char *key = NULL;
1061 struct perm_datum *perdatum;
1062 int rc;
1063 __le32 buf[2];
1064 u32 len;
1065
1066 rc = -ENOMEM;
1067 perdatum = kzalloc(sizeof(*perdatum), GFP_KERNEL);
1068 if (!perdatum)
1069 goto bad;
1070
1071 rc = next_entry(buf, fp, sizeof buf);
1072 if (rc)
1073 goto bad;
1074
1075 len = le32_to_cpu(buf[0]);
1076 perdatum->value = le32_to_cpu(buf[1]);
1077
1078 rc = -ENOMEM;
1079 key = kmalloc(len + 1, GFP_KERNEL);
1080 if (!key)
1081 goto bad;
1082
1083 rc = next_entry(key, fp, len);
1084 if (rc)
1085 goto bad;
1086 key[len] = '\0';
1087
1088 rc = hashtab_insert(h, key, perdatum);
1089 if (rc)
1090 goto bad;
1091
1092 return 0;
1093bad:
1094 perm_destroy(key, perdatum, NULL);
1095 return rc;
1096}
1097
1098static int common_read(struct policydb *p, struct hashtab *h, void *fp)
1099{
1100 char *key = NULL;
1101 struct common_datum *comdatum;
1102 __le32 buf[4];
1103 u32 len, nel;
1104 int i, rc;
1105
1106 rc = -ENOMEM;
1107 comdatum = kzalloc(sizeof(*comdatum), GFP_KERNEL);
1108 if (!comdatum)
1109 goto bad;
1110
1111 rc = next_entry(buf, fp, sizeof buf);
1112 if (rc)
1113 goto bad;
1114
1115 len = le32_to_cpu(buf[0]);
1116 comdatum->value = le32_to_cpu(buf[1]);
1117
1118 rc = symtab_init(&comdatum->permissions, PERM_SYMTAB_SIZE);
1119 if (rc)
1120 goto bad;
1121 comdatum->permissions.nprim = le32_to_cpu(buf[2]);
1122 nel = le32_to_cpu(buf[3]);
1123
1124 rc = -ENOMEM;
1125 key = kmalloc(len + 1, GFP_KERNEL);
1126 if (!key)
1127 goto bad;
1128
1129 rc = next_entry(key, fp, len);
1130 if (rc)
1131 goto bad;
1132 key[len] = '\0';
1133
1134 for (i = 0; i < nel; i++) {
1135 rc = perm_read(p, comdatum->permissions.table, fp);
1136 if (rc)
1137 goto bad;
1138 }
1139
1140 rc = hashtab_insert(h, key, comdatum);
1141 if (rc)
1142 goto bad;
1143 return 0;
1144bad:
1145 common_destroy(key, comdatum, NULL);
1146 return rc;
1147}
1148
1149static int read_cons_helper(struct constraint_node **nodep, int ncons,
1150 int allowxtarget, void *fp)
1151{
1152 struct constraint_node *c, *lc;
1153 struct constraint_expr *e, *le;
1154 __le32 buf[3];
1155 u32 nexpr;
1156 int rc, i, j, depth;
1157
1158 lc = NULL;
1159 for (i = 0; i < ncons; i++) {
1160 c = kzalloc(sizeof(*c), GFP_KERNEL);
1161 if (!c)
1162 return -ENOMEM;
1163
1164 if (lc)
1165 lc->next = c;
1166 else
1167 *nodep = c;
1168
1169 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1170 if (rc)
1171 return rc;
1172 c->permissions = le32_to_cpu(buf[0]);
1173 nexpr = le32_to_cpu(buf[1]);
1174 le = NULL;
1175 depth = -1;
1176 for (j = 0; j < nexpr; j++) {
1177 e = kzalloc(sizeof(*e), GFP_KERNEL);
1178 if (!e)
1179 return -ENOMEM;
1180
1181 if (le)
1182 le->next = e;
1183 else
1184 c->expr = e;
1185
1186 rc = next_entry(buf, fp, (sizeof(u32) * 3));
1187 if (rc)
1188 return rc;
1189 e->expr_type = le32_to_cpu(buf[0]);
1190 e->attr = le32_to_cpu(buf[1]);
1191 e->op = le32_to_cpu(buf[2]);
1192
1193 switch (e->expr_type) {
1194 case CEXPR_NOT:
1195 if (depth < 0)
1196 return -EINVAL;
1197 break;
1198 case CEXPR_AND:
1199 case CEXPR_OR:
1200 if (depth < 1)
1201 return -EINVAL;
1202 depth--;
1203 break;
1204 case CEXPR_ATTR:
1205 if (depth == (CEXPR_MAXDEPTH - 1))
1206 return -EINVAL;
1207 depth++;
1208 break;
1209 case CEXPR_NAMES:
1210 if (!allowxtarget && (e->attr & CEXPR_XTARGET))
1211 return -EINVAL;
1212 if (depth == (CEXPR_MAXDEPTH - 1))
1213 return -EINVAL;
1214 depth++;
1215 rc = ebitmap_read(&e->names, fp);
1216 if (rc)
1217 return rc;
1218 break;
1219 default:
1220 return -EINVAL;
1221 }
1222 le = e;
1223 }
1224 if (depth != 0)
1225 return -EINVAL;
1226 lc = c;
1227 }
1228
1229 return 0;
1230}
1231
1232static int class_read(struct policydb *p, struct hashtab *h, void *fp)
1233{
1234 char *key = NULL;
1235 struct class_datum *cladatum;
1236 __le32 buf[6];
1237 u32 len, len2, ncons, nel;
1238 int i, rc;
1239
1240 rc = -ENOMEM;
1241 cladatum = kzalloc(sizeof(*cladatum), GFP_KERNEL);
1242 if (!cladatum)
1243 goto bad;
1244
1245 rc = next_entry(buf, fp, sizeof(u32)*6);
1246 if (rc)
1247 goto bad;
1248
1249 len = le32_to_cpu(buf[0]);
1250 len2 = le32_to_cpu(buf[1]);
1251 cladatum->value = le32_to_cpu(buf[2]);
1252
1253 rc = symtab_init(&cladatum->permissions, PERM_SYMTAB_SIZE);
1254 if (rc)
1255 goto bad;
1256 cladatum->permissions.nprim = le32_to_cpu(buf[3]);
1257 nel = le32_to_cpu(buf[4]);
1258
1259 ncons = le32_to_cpu(buf[5]);
1260
1261 rc = -ENOMEM;
1262 key = kmalloc(len + 1, GFP_KERNEL);
1263 if (!key)
1264 goto bad;
1265
1266 rc = next_entry(key, fp, len);
1267 if (rc)
1268 goto bad;
1269 key[len] = '\0';
1270
1271 if (len2) {
1272 rc = -ENOMEM;
1273 cladatum->comkey = kmalloc(len2 + 1, GFP_KERNEL);
1274 if (!cladatum->comkey)
1275 goto bad;
1276 rc = next_entry(cladatum->comkey, fp, len2);
1277 if (rc)
1278 goto bad;
1279 cladatum->comkey[len2] = '\0';
1280
1281 rc = -EINVAL;
1282 cladatum->comdatum = hashtab_search(p->p_commons.table, cladatum->comkey);
1283 if (!cladatum->comdatum) {
1284 printk(KERN_ERR "SELinux: unknown common %s\n", cladatum->comkey);
1285 goto bad;
1286 }
1287 }
1288 for (i = 0; i < nel; i++) {
1289 rc = perm_read(p, cladatum->permissions.table, fp);
1290 if (rc)
1291 goto bad;
1292 }
1293
1294 rc = read_cons_helper(&cladatum->constraints, ncons, 0, fp);
1295 if (rc)
1296 goto bad;
1297
1298 if (p->policyvers >= POLICYDB_VERSION_VALIDATETRANS) {
1299 /* grab the validatetrans rules */
1300 rc = next_entry(buf, fp, sizeof(u32));
1301 if (rc)
1302 goto bad;
1303 ncons = le32_to_cpu(buf[0]);
1304 rc = read_cons_helper(&cladatum->validatetrans, ncons, 1, fp);
1305 if (rc)
1306 goto bad;
1307 }
1308
1309 rc = hashtab_insert(h, key, cladatum);
1310 if (rc)
1311 goto bad;
1312
1313 return 0;
1314bad:
1315 cls_destroy(key, cladatum, NULL);
1316 return rc;
1317}
1318
1319static int role_read(struct policydb *p, struct hashtab *h, void *fp)
1320{
1321 char *key = NULL;
1322 struct role_datum *role;
1323 int rc, to_read = 2;
1324 __le32 buf[3];
1325 u32 len;
1326
1327 rc = -ENOMEM;
1328 role = kzalloc(sizeof(*role), GFP_KERNEL);
1329 if (!role)
1330 goto bad;
1331
1332 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1333 to_read = 3;
1334
1335 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1336 if (rc)
1337 goto bad;
1338
1339 len = le32_to_cpu(buf[0]);
1340 role->value = le32_to_cpu(buf[1]);
1341 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1342 role->bounds = le32_to_cpu(buf[2]);
1343
1344 rc = -ENOMEM;
1345 key = kmalloc(len + 1, GFP_KERNEL);
1346 if (!key)
1347 goto bad;
1348
1349 rc = next_entry(key, fp, len);
1350 if (rc)
1351 goto bad;
1352 key[len] = '\0';
1353
1354 rc = ebitmap_read(&role->dominates, fp);
1355 if (rc)
1356 goto bad;
1357
1358 rc = ebitmap_read(&role->types, fp);
1359 if (rc)
1360 goto bad;
1361
1362 if (strcmp(key, OBJECT_R) == 0) {
1363 rc = -EINVAL;
1364 if (role->value != OBJECT_R_VAL) {
1365 printk(KERN_ERR "SELinux: Role %s has wrong value %d\n",
1366 OBJECT_R, role->value);
1367 goto bad;
1368 }
1369 rc = 0;
1370 goto bad;
1371 }
1372
1373 rc = hashtab_insert(h, key, role);
1374 if (rc)
1375 goto bad;
1376 return 0;
1377bad:
1378 role_destroy(key, role, NULL);
1379 return rc;
1380}
1381
1382static int type_read(struct policydb *p, struct hashtab *h, void *fp)
1383{
1384 char *key = NULL;
1385 struct type_datum *typdatum;
1386 int rc, to_read = 3;
1387 __le32 buf[4];
1388 u32 len;
1389
1390 rc = -ENOMEM;
1391 typdatum = kzalloc(sizeof(*typdatum), GFP_KERNEL);
1392 if (!typdatum)
1393 goto bad;
1394
1395 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1396 to_read = 4;
1397
1398 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1399 if (rc)
1400 goto bad;
1401
1402 len = le32_to_cpu(buf[0]);
1403 typdatum->value = le32_to_cpu(buf[1]);
1404 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
1405 u32 prop = le32_to_cpu(buf[2]);
1406
1407 if (prop & TYPEDATUM_PROPERTY_PRIMARY)
1408 typdatum->primary = 1;
1409 if (prop & TYPEDATUM_PROPERTY_ATTRIBUTE)
1410 typdatum->attribute = 1;
1411
1412 typdatum->bounds = le32_to_cpu(buf[3]);
1413 } else {
1414 typdatum->primary = le32_to_cpu(buf[2]);
1415 }
1416
1417 rc = -ENOMEM;
1418 key = kmalloc(len + 1, GFP_KERNEL);
1419 if (!key)
1420 goto bad;
1421 rc = next_entry(key, fp, len);
1422 if (rc)
1423 goto bad;
1424 key[len] = '\0';
1425
1426 rc = hashtab_insert(h, key, typdatum);
1427 if (rc)
1428 goto bad;
1429 return 0;
1430bad:
1431 type_destroy(key, typdatum, NULL);
1432 return rc;
1433}
1434
1435
1436/*
1437 * Read a MLS level structure from a policydb binary
1438 * representation file.
1439 */
1440static int mls_read_level(struct mls_level *lp, void *fp)
1441{
1442 __le32 buf[1];
1443 int rc;
1444
1445 memset(lp, 0, sizeof(*lp));
1446
1447 rc = next_entry(buf, fp, sizeof buf);
1448 if (rc) {
1449 printk(KERN_ERR "SELinux: mls: truncated level\n");
1450 return rc;
1451 }
1452 lp->sens = le32_to_cpu(buf[0]);
1453
1454 rc = ebitmap_read(&lp->cat, fp);
1455 if (rc) {
1456 printk(KERN_ERR "SELinux: mls: error reading level categories\n");
1457 return rc;
1458 }
1459 return 0;
1460}
1461
1462static int user_read(struct policydb *p, struct hashtab *h, void *fp)
1463{
1464 char *key = NULL;
1465 struct user_datum *usrdatum;
1466 int rc, to_read = 2;
1467 __le32 buf[3];
1468 u32 len;
1469
1470 rc = -ENOMEM;
1471 usrdatum = kzalloc(sizeof(*usrdatum), GFP_KERNEL);
1472 if (!usrdatum)
1473 goto bad;
1474
1475 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1476 to_read = 3;
1477
1478 rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
1479 if (rc)
1480 goto bad;
1481
1482 len = le32_to_cpu(buf[0]);
1483 usrdatum->value = le32_to_cpu(buf[1]);
1484 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
1485 usrdatum->bounds = le32_to_cpu(buf[2]);
1486
1487 rc = -ENOMEM;
1488 key = kmalloc(len + 1, GFP_KERNEL);
1489 if (!key)
1490 goto bad;
1491 rc = next_entry(key, fp, len);
1492 if (rc)
1493 goto bad;
1494 key[len] = '\0';
1495
1496 rc = ebitmap_read(&usrdatum->roles, fp);
1497 if (rc)
1498 goto bad;
1499
1500 if (p->policyvers >= POLICYDB_VERSION_MLS) {
1501 rc = mls_read_range_helper(&usrdatum->range, fp);
1502 if (rc)
1503 goto bad;
1504 rc = mls_read_level(&usrdatum->dfltlevel, fp);
1505 if (rc)
1506 goto bad;
1507 }
1508
1509 rc = hashtab_insert(h, key, usrdatum);
1510 if (rc)
1511 goto bad;
1512 return 0;
1513bad:
1514 user_destroy(key, usrdatum, NULL);
1515 return rc;
1516}
1517
1518static int sens_read(struct policydb *p, struct hashtab *h, void *fp)
1519{
1520 char *key = NULL;
1521 struct level_datum *levdatum;
1522 int rc;
1523 __le32 buf[2];
1524 u32 len;
1525
1526 rc = -ENOMEM;
1527 levdatum = kzalloc(sizeof(*levdatum), GFP_ATOMIC);
1528 if (!levdatum)
1529 goto bad;
1530
1531 rc = next_entry(buf, fp, sizeof buf);
1532 if (rc)
1533 goto bad;
1534
1535 len = le32_to_cpu(buf[0]);
1536 levdatum->isalias = le32_to_cpu(buf[1]);
1537
1538 rc = -ENOMEM;
1539 key = kmalloc(len + 1, GFP_ATOMIC);
1540 if (!key)
1541 goto bad;
1542 rc = next_entry(key, fp, len);
1543 if (rc)
1544 goto bad;
1545 key[len] = '\0';
1546
1547 rc = -ENOMEM;
1548 levdatum->level = kmalloc(sizeof(struct mls_level), GFP_ATOMIC);
1549 if (!levdatum->level)
1550 goto bad;
1551
1552 rc = mls_read_level(levdatum->level, fp);
1553 if (rc)
1554 goto bad;
1555
1556 rc = hashtab_insert(h, key, levdatum);
1557 if (rc)
1558 goto bad;
1559 return 0;
1560bad:
1561 sens_destroy(key, levdatum, NULL);
1562 return rc;
1563}
1564
1565static int cat_read(struct policydb *p, struct hashtab *h, void *fp)
1566{
1567 char *key = NULL;
1568 struct cat_datum *catdatum;
1569 int rc;
1570 __le32 buf[3];
1571 u32 len;
1572
1573 rc = -ENOMEM;
1574 catdatum = kzalloc(sizeof(*catdatum), GFP_ATOMIC);
1575 if (!catdatum)
1576 goto bad;
1577
1578 rc = next_entry(buf, fp, sizeof buf);
1579 if (rc)
1580 goto bad;
1581
1582 len = le32_to_cpu(buf[0]);
1583 catdatum->value = le32_to_cpu(buf[1]);
1584 catdatum->isalias = le32_to_cpu(buf[2]);
1585
1586 rc = -ENOMEM;
1587 key = kmalloc(len + 1, GFP_ATOMIC);
1588 if (!key)
1589 goto bad;
1590 rc = next_entry(key, fp, len);
1591 if (rc)
1592 goto bad;
1593 key[len] = '\0';
1594
1595 rc = hashtab_insert(h, key, catdatum);
1596 if (rc)
1597 goto bad;
1598 return 0;
1599bad:
1600 cat_destroy(key, catdatum, NULL);
1601 return rc;
1602}
1603
1604static int (*read_f[SYM_NUM]) (struct policydb *p, struct hashtab *h, void *fp) =
1605{
1606 common_read,
1607 class_read,
1608 role_read,
1609 type_read,
1610 user_read,
1611 cond_read_bool,
1612 sens_read,
1613 cat_read,
1614};
1615
1616static int user_bounds_sanity_check(void *key, void *datum, void *datap)
1617{
1618 struct user_datum *upper, *user;
1619 struct policydb *p = datap;
1620 int depth = 0;
1621
1622 upper = user = datum;
1623 while (upper->bounds) {
1624 struct ebitmap_node *node;
1625 unsigned long bit;
1626
1627 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1628 printk(KERN_ERR "SELinux: user %s: "
1629 "too deep or looped boundary",
1630 (char *) key);
1631 return -EINVAL;
1632 }
1633
1634 upper = p->user_val_to_struct[upper->bounds - 1];
1635 ebitmap_for_each_positive_bit(&user->roles, node, bit) {
1636 if (ebitmap_get_bit(&upper->roles, bit))
1637 continue;
1638
1639 printk(KERN_ERR
1640 "SELinux: boundary violated policy: "
1641 "user=%s role=%s bounds=%s\n",
1642 sym_name(p, SYM_USERS, user->value - 1),
1643 sym_name(p, SYM_ROLES, bit),
1644 sym_name(p, SYM_USERS, upper->value - 1));
1645
1646 return -EINVAL;
1647 }
1648 }
1649
1650 return 0;
1651}
1652
1653static int role_bounds_sanity_check(void *key, void *datum, void *datap)
1654{
1655 struct role_datum *upper, *role;
1656 struct policydb *p = datap;
1657 int depth = 0;
1658
1659 upper = role = datum;
1660 while (upper->bounds) {
1661 struct ebitmap_node *node;
1662 unsigned long bit;
1663
1664 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1665 printk(KERN_ERR "SELinux: role %s: "
1666 "too deep or looped bounds\n",
1667 (char *) key);
1668 return -EINVAL;
1669 }
1670
1671 upper = p->role_val_to_struct[upper->bounds - 1];
1672 ebitmap_for_each_positive_bit(&role->types, node, bit) {
1673 if (ebitmap_get_bit(&upper->types, bit))
1674 continue;
1675
1676 printk(KERN_ERR
1677 "SELinux: boundary violated policy: "
1678 "role=%s type=%s bounds=%s\n",
1679 sym_name(p, SYM_ROLES, role->value - 1),
1680 sym_name(p, SYM_TYPES, bit),
1681 sym_name(p, SYM_ROLES, upper->value - 1));
1682
1683 return -EINVAL;
1684 }
1685 }
1686
1687 return 0;
1688}
1689
1690static int type_bounds_sanity_check(void *key, void *datum, void *datap)
1691{
1692 struct type_datum *upper;
1693 struct policydb *p = datap;
1694 int depth = 0;
1695
1696 upper = datum;
1697 while (upper->bounds) {
1698 if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
1699 printk(KERN_ERR "SELinux: type %s: "
1700 "too deep or looped boundary\n",
1701 (char *) key);
1702 return -EINVAL;
1703 }
1704
1705 upper = flex_array_get_ptr(p->type_val_to_struct_array,
1706 upper->bounds - 1);
1707 BUG_ON(!upper);
1708
1709 if (upper->attribute) {
1710 printk(KERN_ERR "SELinux: type %s: "
1711 "bounded by attribute %s",
1712 (char *) key,
1713 sym_name(p, SYM_TYPES, upper->value - 1));
1714 return -EINVAL;
1715 }
1716 }
1717
1718 return 0;
1719}
1720
1721static int policydb_bounds_sanity_check(struct policydb *p)
1722{
1723 int rc;
1724
1725 if (p->policyvers < POLICYDB_VERSION_BOUNDARY)
1726 return 0;
1727
1728 rc = hashtab_map(p->p_users.table,
1729 user_bounds_sanity_check, p);
1730 if (rc)
1731 return rc;
1732
1733 rc = hashtab_map(p->p_roles.table,
1734 role_bounds_sanity_check, p);
1735 if (rc)
1736 return rc;
1737
1738 rc = hashtab_map(p->p_types.table,
1739 type_bounds_sanity_check, p);
1740 if (rc)
1741 return rc;
1742
1743 return 0;
1744}
1745
1746extern int ss_initialized;
1747
1748u16 string_to_security_class(struct policydb *p, const char *name)
1749{
1750 struct class_datum *cladatum;
1751
1752 cladatum = hashtab_search(p->p_classes.table, name);
1753 if (!cladatum)
1754 return 0;
1755
1756 return cladatum->value;
1757}
1758
1759u32 string_to_av_perm(struct policydb *p, u16 tclass, const char *name)
1760{
1761 struct class_datum *cladatum;
1762 struct perm_datum *perdatum = NULL;
1763 struct common_datum *comdatum;
1764
1765 if (!tclass || tclass > p->p_classes.nprim)
1766 return 0;
1767
1768 cladatum = p->class_val_to_struct[tclass-1];
1769 comdatum = cladatum->comdatum;
1770 if (comdatum)
1771 perdatum = hashtab_search(comdatum->permissions.table,
1772 name);
1773 if (!perdatum)
1774 perdatum = hashtab_search(cladatum->permissions.table,
1775 name);
1776 if (!perdatum)
1777 return 0;
1778
1779 return 1U << (perdatum->value-1);
1780}
1781
1782static int range_read(struct policydb *p, void *fp)
1783{
1784 struct range_trans *rt = NULL;
1785 struct mls_range *r = NULL;
1786 int i, rc;
1787 __le32 buf[2];
1788 u32 nel;
1789
1790 if (p->policyvers < POLICYDB_VERSION_MLS)
1791 return 0;
1792
1793 rc = next_entry(buf, fp, sizeof(u32));
1794 if (rc)
1795 goto out;
1796
1797 nel = le32_to_cpu(buf[0]);
1798 for (i = 0; i < nel; i++) {
1799 rc = -ENOMEM;
1800 rt = kzalloc(sizeof(*rt), GFP_KERNEL);
1801 if (!rt)
1802 goto out;
1803
1804 rc = next_entry(buf, fp, (sizeof(u32) * 2));
1805 if (rc)
1806 goto out;
1807
1808 rt->source_type = le32_to_cpu(buf[0]);
1809 rt->target_type = le32_to_cpu(buf[1]);
1810 if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
1811 rc = next_entry(buf, fp, sizeof(u32));
1812 if (rc)
1813 goto out;
1814 rt->target_class = le32_to_cpu(buf[0]);
1815 } else
1816 rt->target_class = p->process_class;
1817
1818 rc = -EINVAL;
1819 if (!policydb_type_isvalid(p, rt->source_type) ||
1820 !policydb_type_isvalid(p, rt->target_type) ||
1821 !policydb_class_isvalid(p, rt->target_class))
1822 goto out;
1823
1824 rc = -ENOMEM;
1825 r = kzalloc(sizeof(*r), GFP_KERNEL);
1826 if (!r)
1827 goto out;
1828
1829 rc = mls_read_range_helper(r, fp);
1830 if (rc)
1831 goto out;
1832
1833 rc = -EINVAL;
1834 if (!mls_range_isvalid(p, r)) {
1835 printk(KERN_WARNING "SELinux: rangetrans: invalid range\n");
1836 goto out;
1837 }
1838
1839 rc = hashtab_insert(p->range_tr, rt, r);
1840 if (rc)
1841 goto out;
1842
1843 rt = NULL;
1844 r = NULL;
1845 }
1846 hash_eval(p->range_tr, "rangetr");
1847 rc = 0;
1848out:
1849 kfree(rt);
1850 kfree(r);
1851 return rc;
1852}
1853
1854static int filename_trans_read(struct policydb *p, void *fp)
1855{
1856 struct filename_trans *ft;
1857 struct filename_trans_datum *otype;
1858 char *name;
1859 u32 nel, len;
1860 __le32 buf[4];
1861 int rc, i;
1862
1863 if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
1864 return 0;
1865
1866 rc = next_entry(buf, fp, sizeof(u32));
1867 if (rc)
1868 return rc;
1869 nel = le32_to_cpu(buf[0]);
1870
1871 for (i = 0; i < nel; i++) {
1872 ft = NULL;
1873 otype = NULL;
1874 name = NULL;
1875
1876 rc = -ENOMEM;
1877 ft = kzalloc(sizeof(*ft), GFP_KERNEL);
1878 if (!ft)
1879 goto out;
1880
1881 rc = -ENOMEM;
1882 otype = kmalloc(sizeof(*otype), GFP_KERNEL);
1883 if (!otype)
1884 goto out;
1885
1886 /* length of the path component string */
1887 rc = next_entry(buf, fp, sizeof(u32));
1888 if (rc)
1889 goto out;
1890 len = le32_to_cpu(buf[0]);
1891
1892 rc = -ENOMEM;
1893 name = kmalloc(len + 1, GFP_KERNEL);
1894 if (!name)
1895 goto out;
1896
1897 ft->name = name;
1898
1899 /* path component string */
1900 rc = next_entry(name, fp, len);
1901 if (rc)
1902 goto out;
1903 name[len] = 0;
1904
1905 rc = next_entry(buf, fp, sizeof(u32) * 4);
1906 if (rc)
1907 goto out;
1908
1909 ft->stype = le32_to_cpu(buf[0]);
1910 ft->ttype = le32_to_cpu(buf[1]);
1911 ft->tclass = le32_to_cpu(buf[2]);
1912
1913 otype->otype = le32_to_cpu(buf[3]);
1914
1915 rc = ebitmap_set_bit(&p->filename_trans_ttypes, ft->ttype, 1);
1916 if (rc)
1917 goto out;
1918
1919 hashtab_insert(p->filename_trans, ft, otype);
1920 }
1921 hash_eval(p->filename_trans, "filenametr");
1922 return 0;
1923out:
1924 kfree(ft);
1925 kfree(name);
1926 kfree(otype);
1927
1928 return rc;
1929}
1930
1931static int genfs_read(struct policydb *p, void *fp)
1932{
1933 int i, j, rc;
1934 u32 nel, nel2, len, len2;
1935 __le32 buf[1];
1936 struct ocontext *l, *c;
1937 struct ocontext *newc = NULL;
1938 struct genfs *genfs_p, *genfs;
1939 struct genfs *newgenfs = NULL;
1940
1941 rc = next_entry(buf, fp, sizeof(u32));
1942 if (rc)
1943 goto out;
1944 nel = le32_to_cpu(buf[0]);
1945
1946 for (i = 0; i < nel; i++) {
1947 rc = next_entry(buf, fp, sizeof(u32));
1948 if (rc)
1949 goto out;
1950 len = le32_to_cpu(buf[0]);
1951
1952 rc = -ENOMEM;
1953 newgenfs = kzalloc(sizeof(*newgenfs), GFP_KERNEL);
1954 if (!newgenfs)
1955 goto out;
1956
1957 rc = -ENOMEM;
1958 newgenfs->fstype = kmalloc(len + 1, GFP_KERNEL);
1959 if (!newgenfs->fstype)
1960 goto out;
1961
1962 rc = next_entry(newgenfs->fstype, fp, len);
1963 if (rc)
1964 goto out;
1965
1966 newgenfs->fstype[len] = 0;
1967
1968 for (genfs_p = NULL, genfs = p->genfs; genfs;
1969 genfs_p = genfs, genfs = genfs->next) {
1970 rc = -EINVAL;
1971 if (strcmp(newgenfs->fstype, genfs->fstype) == 0) {
1972 printk(KERN_ERR "SELinux: dup genfs fstype %s\n",
1973 newgenfs->fstype);
1974 goto out;
1975 }
1976 if (strcmp(newgenfs->fstype, genfs->fstype) < 0)
1977 break;
1978 }
1979 newgenfs->next = genfs;
1980 if (genfs_p)
1981 genfs_p->next = newgenfs;
1982 else
1983 p->genfs = newgenfs;
1984 genfs = newgenfs;
1985 newgenfs = NULL;
1986
1987 rc = next_entry(buf, fp, sizeof(u32));
1988 if (rc)
1989 goto out;
1990
1991 nel2 = le32_to_cpu(buf[0]);
1992 for (j = 0; j < nel2; j++) {
1993 rc = next_entry(buf, fp, sizeof(u32));
1994 if (rc)
1995 goto out;
1996 len = le32_to_cpu(buf[0]);
1997
1998 rc = -ENOMEM;
1999 newc = kzalloc(sizeof(*newc), GFP_KERNEL);
2000 if (!newc)
2001 goto out;
2002
2003 rc = -ENOMEM;
2004 newc->u.name = kmalloc(len + 1, GFP_KERNEL);
2005 if (!newc->u.name)
2006 goto out;
2007
2008 rc = next_entry(newc->u.name, fp, len);
2009 if (rc)
2010 goto out;
2011 newc->u.name[len] = 0;
2012
2013 rc = next_entry(buf, fp, sizeof(u32));
2014 if (rc)
2015 goto out;
2016
2017 newc->v.sclass = le32_to_cpu(buf[0]);
2018 rc = context_read_and_validate(&newc->context[0], p, fp);
2019 if (rc)
2020 goto out;
2021
2022 for (l = NULL, c = genfs->head; c;
2023 l = c, c = c->next) {
2024 rc = -EINVAL;
2025 if (!strcmp(newc->u.name, c->u.name) &&
2026 (!c->v.sclass || !newc->v.sclass ||
2027 newc->v.sclass == c->v.sclass)) {
2028 printk(KERN_ERR "SELinux: dup genfs entry (%s,%s)\n",
2029 genfs->fstype, c->u.name);
2030 goto out;
2031 }
2032 len = strlen(newc->u.name);
2033 len2 = strlen(c->u.name);
2034 if (len > len2)
2035 break;
2036 }
2037
2038 newc->next = c;
2039 if (l)
2040 l->next = newc;
2041 else
2042 genfs->head = newc;
2043 newc = NULL;
2044 }
2045 }
2046 rc = 0;
2047out:
2048 if (newgenfs)
2049 kfree(newgenfs->fstype);
2050 kfree(newgenfs);
2051 ocontext_destroy(newc, OCON_FSUSE);
2052
2053 return rc;
2054}
2055
2056static int ocontext_read(struct policydb *p, struct policydb_compat_info *info,
2057 void *fp)
2058{
2059 int i, j, rc;
2060 u32 nel, len;
2061 __le32 buf[3];
2062 struct ocontext *l, *c;
2063 u32 nodebuf[8];
2064
2065 for (i = 0; i < info->ocon_num; i++) {
2066 rc = next_entry(buf, fp, sizeof(u32));
2067 if (rc)
2068 goto out;
2069 nel = le32_to_cpu(buf[0]);
2070
2071 l = NULL;
2072 for (j = 0; j < nel; j++) {
2073 rc = -ENOMEM;
2074 c = kzalloc(sizeof(*c), GFP_KERNEL);
2075 if (!c)
2076 goto out;
2077 if (l)
2078 l->next = c;
2079 else
2080 p->ocontexts[i] = c;
2081 l = c;
2082
2083 switch (i) {
2084 case OCON_ISID:
2085 rc = next_entry(buf, fp, sizeof(u32));
2086 if (rc)
2087 goto out;
2088
2089 c->sid[0] = le32_to_cpu(buf[0]);
2090 rc = context_read_and_validate(&c->context[0], p, fp);
2091 if (rc)
2092 goto out;
2093 break;
2094 case OCON_FS:
2095 case OCON_NETIF:
2096 rc = next_entry(buf, fp, sizeof(u32));
2097 if (rc)
2098 goto out;
2099 len = le32_to_cpu(buf[0]);
2100
2101 rc = -ENOMEM;
2102 c->u.name = kmalloc(len + 1, GFP_KERNEL);
2103 if (!c->u.name)
2104 goto out;
2105
2106 rc = next_entry(c->u.name, fp, len);
2107 if (rc)
2108 goto out;
2109
2110 c->u.name[len] = 0;
2111 rc = context_read_and_validate(&c->context[0], p, fp);
2112 if (rc)
2113 goto out;
2114 rc = context_read_and_validate(&c->context[1], p, fp);
2115 if (rc)
2116 goto out;
2117 break;
2118 case OCON_PORT:
2119 rc = next_entry(buf, fp, sizeof(u32)*3);
2120 if (rc)
2121 goto out;
2122 c->u.port.protocol = le32_to_cpu(buf[0]);
2123 c->u.port.low_port = le32_to_cpu(buf[1]);
2124 c->u.port.high_port = le32_to_cpu(buf[2]);
2125 rc = context_read_and_validate(&c->context[0], p, fp);
2126 if (rc)
2127 goto out;
2128 break;
2129 case OCON_NODE:
2130 rc = next_entry(nodebuf, fp, sizeof(u32) * 2);
2131 if (rc)
2132 goto out;
2133 c->u.node.addr = nodebuf[0]; /* network order */
2134 c->u.node.mask = nodebuf[1]; /* network order */
2135 rc = context_read_and_validate(&c->context[0], p, fp);
2136 if (rc)
2137 goto out;
2138 break;
2139 case OCON_FSUSE:
2140 rc = next_entry(buf, fp, sizeof(u32)*2);
2141 if (rc)
2142 goto out;
2143
2144 rc = -EINVAL;
2145 c->v.behavior = le32_to_cpu(buf[0]);
2146 if (c->v.behavior > SECURITY_FS_USE_NONE)
2147 goto out;
2148
2149 rc = -ENOMEM;
2150 len = le32_to_cpu(buf[1]);
2151 c->u.name = kmalloc(len + 1, GFP_KERNEL);
2152 if (!c->u.name)
2153 goto out;
2154
2155 rc = next_entry(c->u.name, fp, len);
2156 if (rc)
2157 goto out;
2158 c->u.name[len] = 0;
2159 rc = context_read_and_validate(&c->context[0], p, fp);
2160 if (rc)
2161 goto out;
2162 break;
2163 case OCON_NODE6: {
2164 int k;
2165
2166 rc = next_entry(nodebuf, fp, sizeof(u32) * 8);
2167 if (rc)
2168 goto out;
2169 for (k = 0; k < 4; k++)
2170 c->u.node6.addr[k] = nodebuf[k];
2171 for (k = 0; k < 4; k++)
2172 c->u.node6.mask[k] = nodebuf[k+4];
2173 rc = context_read_and_validate(&c->context[0], p, fp);
2174 if (rc)
2175 goto out;
2176 break;
2177 }
2178 }
2179 }
2180 }
2181 rc = 0;
2182out:
2183 return rc;
2184}
2185
2186/*
2187 * Read the configuration data from a policy database binary
2188 * representation file into a policy database structure.
2189 */
2190int policydb_read(struct policydb *p, void *fp)
2191{
2192 struct role_allow *ra, *lra;
2193 struct role_trans *tr, *ltr;
2194 int i, j, rc;
2195 __le32 buf[4];
2196 u32 len, nprim, nel;
2197
2198 char *policydb_str;
2199 struct policydb_compat_info *info;
2200
2201 rc = policydb_init(p);
2202 if (rc)
2203 return rc;
2204
2205 /* Read the magic number and string length. */
2206 rc = next_entry(buf, fp, sizeof(u32) * 2);
2207 if (rc)
2208 goto bad;
2209
2210 rc = -EINVAL;
2211 if (le32_to_cpu(buf[0]) != POLICYDB_MAGIC) {
2212 printk(KERN_ERR "SELinux: policydb magic number 0x%x does "
2213 "not match expected magic number 0x%x\n",
2214 le32_to_cpu(buf[0]), POLICYDB_MAGIC);
2215 goto bad;
2216 }
2217
2218 rc = -EINVAL;
2219 len = le32_to_cpu(buf[1]);
2220 if (len != strlen(POLICYDB_STRING)) {
2221 printk(KERN_ERR "SELinux: policydb string length %d does not "
2222 "match expected length %Zu\n",
2223 len, strlen(POLICYDB_STRING));
2224 goto bad;
2225 }
2226
2227 rc = -ENOMEM;
2228 policydb_str = kmalloc(len + 1, GFP_KERNEL);
2229 if (!policydb_str) {
2230 printk(KERN_ERR "SELinux: unable to allocate memory for policydb "
2231 "string of length %d\n", len);
2232 goto bad;
2233 }
2234
2235 rc = next_entry(policydb_str, fp, len);
2236 if (rc) {
2237 printk(KERN_ERR "SELinux: truncated policydb string identifier\n");
2238 kfree(policydb_str);
2239 goto bad;
2240 }
2241
2242 rc = -EINVAL;
2243 policydb_str[len] = '\0';
2244 if (strcmp(policydb_str, POLICYDB_STRING)) {
2245 printk(KERN_ERR "SELinux: policydb string %s does not match "
2246 "my string %s\n", policydb_str, POLICYDB_STRING);
2247 kfree(policydb_str);
2248 goto bad;
2249 }
2250 /* Done with policydb_str. */
2251 kfree(policydb_str);
2252 policydb_str = NULL;
2253
2254 /* Read the version and table sizes. */
2255 rc = next_entry(buf, fp, sizeof(u32)*4);
2256 if (rc)
2257 goto bad;
2258
2259 rc = -EINVAL;
2260 p->policyvers = le32_to_cpu(buf[0]);
2261 if (p->policyvers < POLICYDB_VERSION_MIN ||
2262 p->policyvers > POLICYDB_VERSION_MAX) {
2263 printk(KERN_ERR "SELinux: policydb version %d does not match "
2264 "my version range %d-%d\n",
2265 le32_to_cpu(buf[0]), POLICYDB_VERSION_MIN, POLICYDB_VERSION_MAX);
2266 goto bad;
2267 }
2268
2269 if ((le32_to_cpu(buf[1]) & POLICYDB_CONFIG_MLS)) {
2270 p->mls_enabled = 1;
2271
2272 rc = -EINVAL;
2273 if (p->policyvers < POLICYDB_VERSION_MLS) {
2274 printk(KERN_ERR "SELinux: security policydb version %d "
2275 "(MLS) not backwards compatible\n",
2276 p->policyvers);
2277 goto bad;
2278 }
2279 }
2280 p->reject_unknown = !!(le32_to_cpu(buf[1]) & REJECT_UNKNOWN);
2281 p->allow_unknown = !!(le32_to_cpu(buf[1]) & ALLOW_UNKNOWN);
2282
2283 if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
2284 rc = ebitmap_read(&p->policycaps, fp);
2285 if (rc)
2286 goto bad;
2287 }
2288
2289 if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
2290 rc = ebitmap_read(&p->permissive_map, fp);
2291 if (rc)
2292 goto bad;
2293 }
2294
2295 rc = -EINVAL;
2296 info = policydb_lookup_compat(p->policyvers);
2297 if (!info) {
2298 printk(KERN_ERR "SELinux: unable to find policy compat info "
2299 "for version %d\n", p->policyvers);
2300 goto bad;
2301 }
2302
2303 rc = -EINVAL;
2304 if (le32_to_cpu(buf[2]) != info->sym_num ||
2305 le32_to_cpu(buf[3]) != info->ocon_num) {
2306 printk(KERN_ERR "SELinux: policydb table sizes (%d,%d) do "
2307 "not match mine (%d,%d)\n", le32_to_cpu(buf[2]),
2308 le32_to_cpu(buf[3]),
2309 info->sym_num, info->ocon_num);
2310 goto bad;
2311 }
2312
2313 for (i = 0; i < info->sym_num; i++) {
2314 rc = next_entry(buf, fp, sizeof(u32)*2);
2315 if (rc)
2316 goto bad;
2317 nprim = le32_to_cpu(buf[0]);
2318 nel = le32_to_cpu(buf[1]);
2319 for (j = 0; j < nel; j++) {
2320 rc = read_f[i](p, p->symtab[i].table, fp);
2321 if (rc)
2322 goto bad;
2323 }
2324
2325 p->symtab[i].nprim = nprim;
2326 }
2327
2328 rc = -EINVAL;
2329 p->process_class = string_to_security_class(p, "process");
2330 if (!p->process_class)
2331 goto bad;
2332
2333 rc = avtab_read(&p->te_avtab, fp, p);
2334 if (rc)
2335 goto bad;
2336
2337 if (p->policyvers >= POLICYDB_VERSION_BOOL) {
2338 rc = cond_read_list(p, fp);
2339 if (rc)
2340 goto bad;
2341 }
2342
2343 rc = next_entry(buf, fp, sizeof(u32));
2344 if (rc)
2345 goto bad;
2346 nel = le32_to_cpu(buf[0]);
2347 ltr = NULL;
2348 for (i = 0; i < nel; i++) {
2349 rc = -ENOMEM;
2350 tr = kzalloc(sizeof(*tr), GFP_KERNEL);
2351 if (!tr)
2352 goto bad;
2353 if (ltr)
2354 ltr->next = tr;
2355 else
2356 p->role_tr = tr;
2357 rc = next_entry(buf, fp, sizeof(u32)*3);
2358 if (rc)
2359 goto bad;
2360
2361 rc = -EINVAL;
2362 tr->role = le32_to_cpu(buf[0]);
2363 tr->type = le32_to_cpu(buf[1]);
2364 tr->new_role = le32_to_cpu(buf[2]);
2365 if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2366 rc = next_entry(buf, fp, sizeof(u32));
2367 if (rc)
2368 goto bad;
2369 tr->tclass = le32_to_cpu(buf[0]);
2370 } else
2371 tr->tclass = p->process_class;
2372
2373 if (!policydb_role_isvalid(p, tr->role) ||
2374 !policydb_type_isvalid(p, tr->type) ||
2375 !policydb_class_isvalid(p, tr->tclass) ||
2376 !policydb_role_isvalid(p, tr->new_role))
2377 goto bad;
2378 ltr = tr;
2379 }
2380
2381 rc = next_entry(buf, fp, sizeof(u32));
2382 if (rc)
2383 goto bad;
2384 nel = le32_to_cpu(buf[0]);
2385 lra = NULL;
2386 for (i = 0; i < nel; i++) {
2387 rc = -ENOMEM;
2388 ra = kzalloc(sizeof(*ra), GFP_KERNEL);
2389 if (!ra)
2390 goto bad;
2391 if (lra)
2392 lra->next = ra;
2393 else
2394 p->role_allow = ra;
2395 rc = next_entry(buf, fp, sizeof(u32)*2);
2396 if (rc)
2397 goto bad;
2398
2399 rc = -EINVAL;
2400 ra->role = le32_to_cpu(buf[0]);
2401 ra->new_role = le32_to_cpu(buf[1]);
2402 if (!policydb_role_isvalid(p, ra->role) ||
2403 !policydb_role_isvalid(p, ra->new_role))
2404 goto bad;
2405 lra = ra;
2406 }
2407
2408 rc = filename_trans_read(p, fp);
2409 if (rc)
2410 goto bad;
2411
2412 rc = policydb_index(p);
2413 if (rc)
2414 goto bad;
2415
2416 rc = -EINVAL;
2417 p->process_trans_perms = string_to_av_perm(p, p->process_class, "transition");
2418 p->process_trans_perms |= string_to_av_perm(p, p->process_class, "dyntransition");
2419 if (!p->process_trans_perms)
2420 goto bad;
2421
2422 rc = ocontext_read(p, info, fp);
2423 if (rc)
2424 goto bad;
2425
2426 rc = genfs_read(p, fp);
2427 if (rc)
2428 goto bad;
2429
2430 rc = range_read(p, fp);
2431 if (rc)
2432 goto bad;
2433
2434 rc = -ENOMEM;
2435 p->type_attr_map_array = flex_array_alloc(sizeof(struct ebitmap),
2436 p->p_types.nprim,
2437 GFP_KERNEL | __GFP_ZERO);
2438 if (!p->type_attr_map_array)
2439 goto bad;
2440
2441 /* preallocate so we don't have to worry about the put ever failing */
2442 rc = flex_array_prealloc(p->type_attr_map_array, 0, p->p_types.nprim,
2443 GFP_KERNEL | __GFP_ZERO);
2444 if (rc)
2445 goto bad;
2446
2447 for (i = 0; i < p->p_types.nprim; i++) {
2448 struct ebitmap *e = flex_array_get(p->type_attr_map_array, i);
2449
2450 BUG_ON(!e);
2451 ebitmap_init(e);
2452 if (p->policyvers >= POLICYDB_VERSION_AVTAB) {
2453 rc = ebitmap_read(e, fp);
2454 if (rc)
2455 goto bad;
2456 }
2457 /* add the type itself as the degenerate case */
2458 rc = ebitmap_set_bit(e, i, 1);
2459 if (rc)
2460 goto bad;
2461 }
2462
2463 rc = policydb_bounds_sanity_check(p);
2464 if (rc)
2465 goto bad;
2466
2467 rc = 0;
2468out:
2469 return rc;
2470bad:
2471 policydb_destroy(p);
2472 goto out;
2473}
2474
2475/*
2476 * Write a MLS level structure to a policydb binary
2477 * representation file.
2478 */
2479static int mls_write_level(struct mls_level *l, void *fp)
2480{
2481 __le32 buf[1];
2482 int rc;
2483
2484 buf[0] = cpu_to_le32(l->sens);
2485 rc = put_entry(buf, sizeof(u32), 1, fp);
2486 if (rc)
2487 return rc;
2488
2489 rc = ebitmap_write(&l->cat, fp);
2490 if (rc)
2491 return rc;
2492
2493 return 0;
2494}
2495
2496/*
2497 * Write a MLS range structure to a policydb binary
2498 * representation file.
2499 */
2500static int mls_write_range_helper(struct mls_range *r, void *fp)
2501{
2502 __le32 buf[3];
2503 size_t items;
2504 int rc, eq;
2505
2506 eq = mls_level_eq(&r->level[1], &r->level[0]);
2507
2508 if (eq)
2509 items = 2;
2510 else
2511 items = 3;
2512 buf[0] = cpu_to_le32(items-1);
2513 buf[1] = cpu_to_le32(r->level[0].sens);
2514 if (!eq)
2515 buf[2] = cpu_to_le32(r->level[1].sens);
2516
2517 BUG_ON(items > (sizeof(buf)/sizeof(buf[0])));
2518
2519 rc = put_entry(buf, sizeof(u32), items, fp);
2520 if (rc)
2521 return rc;
2522
2523 rc = ebitmap_write(&r->level[0].cat, fp);
2524 if (rc)
2525 return rc;
2526 if (!eq) {
2527 rc = ebitmap_write(&r->level[1].cat, fp);
2528 if (rc)
2529 return rc;
2530 }
2531
2532 return 0;
2533}
2534
2535static int sens_write(void *vkey, void *datum, void *ptr)
2536{
2537 char *key = vkey;
2538 struct level_datum *levdatum = datum;
2539 struct policy_data *pd = ptr;
2540 void *fp = pd->fp;
2541 __le32 buf[2];
2542 size_t len;
2543 int rc;
2544
2545 len = strlen(key);
2546 buf[0] = cpu_to_le32(len);
2547 buf[1] = cpu_to_le32(levdatum->isalias);
2548 rc = put_entry(buf, sizeof(u32), 2, fp);
2549 if (rc)
2550 return rc;
2551
2552 rc = put_entry(key, 1, len, fp);
2553 if (rc)
2554 return rc;
2555
2556 rc = mls_write_level(levdatum->level, fp);
2557 if (rc)
2558 return rc;
2559
2560 return 0;
2561}
2562
2563static int cat_write(void *vkey, void *datum, void *ptr)
2564{
2565 char *key = vkey;
2566 struct cat_datum *catdatum = datum;
2567 struct policy_data *pd = ptr;
2568 void *fp = pd->fp;
2569 __le32 buf[3];
2570 size_t len;
2571 int rc;
2572
2573 len = strlen(key);
2574 buf[0] = cpu_to_le32(len);
2575 buf[1] = cpu_to_le32(catdatum->value);
2576 buf[2] = cpu_to_le32(catdatum->isalias);
2577 rc = put_entry(buf, sizeof(u32), 3, fp);
2578 if (rc)
2579 return rc;
2580
2581 rc = put_entry(key, 1, len, fp);
2582 if (rc)
2583 return rc;
2584
2585 return 0;
2586}
2587
2588static int role_trans_write(struct policydb *p, void *fp)
2589{
2590 struct role_trans *r = p->role_tr;
2591 struct role_trans *tr;
2592 u32 buf[3];
2593 size_t nel;
2594 int rc;
2595
2596 nel = 0;
2597 for (tr = r; tr; tr = tr->next)
2598 nel++;
2599 buf[0] = cpu_to_le32(nel);
2600 rc = put_entry(buf, sizeof(u32), 1, fp);
2601 if (rc)
2602 return rc;
2603 for (tr = r; tr; tr = tr->next) {
2604 buf[0] = cpu_to_le32(tr->role);
2605 buf[1] = cpu_to_le32(tr->type);
2606 buf[2] = cpu_to_le32(tr->new_role);
2607 rc = put_entry(buf, sizeof(u32), 3, fp);
2608 if (rc)
2609 return rc;
2610 if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
2611 buf[0] = cpu_to_le32(tr->tclass);
2612 rc = put_entry(buf, sizeof(u32), 1, fp);
2613 if (rc)
2614 return rc;
2615 }
2616 }
2617
2618 return 0;
2619}
2620
2621static int role_allow_write(struct role_allow *r, void *fp)
2622{
2623 struct role_allow *ra;
2624 u32 buf[2];
2625 size_t nel;
2626 int rc;
2627
2628 nel = 0;
2629 for (ra = r; ra; ra = ra->next)
2630 nel++;
2631 buf[0] = cpu_to_le32(nel);
2632 rc = put_entry(buf, sizeof(u32), 1, fp);
2633 if (rc)
2634 return rc;
2635 for (ra = r; ra; ra = ra->next) {
2636 buf[0] = cpu_to_le32(ra->role);
2637 buf[1] = cpu_to_le32(ra->new_role);
2638 rc = put_entry(buf, sizeof(u32), 2, fp);
2639 if (rc)
2640 return rc;
2641 }
2642 return 0;
2643}
2644
2645/*
2646 * Write a security context structure
2647 * to a policydb binary representation file.
2648 */
2649static int context_write(struct policydb *p, struct context *c,
2650 void *fp)
2651{
2652 int rc;
2653 __le32 buf[3];
2654
2655 buf[0] = cpu_to_le32(c->user);
2656 buf[1] = cpu_to_le32(c->role);
2657 buf[2] = cpu_to_le32(c->type);
2658
2659 rc = put_entry(buf, sizeof(u32), 3, fp);
2660 if (rc)
2661 return rc;
2662
2663 rc = mls_write_range_helper(&c->range, fp);
2664 if (rc)
2665 return rc;
2666
2667 return 0;
2668}
2669
2670/*
2671 * The following *_write functions are used to
2672 * write the symbol data to a policy database
2673 * binary representation file.
2674 */
2675
2676static int perm_write(void *vkey, void *datum, void *fp)
2677{
2678 char *key = vkey;
2679 struct perm_datum *perdatum = datum;
2680 __le32 buf[2];
2681 size_t len;
2682 int rc;
2683
2684 len = strlen(key);
2685 buf[0] = cpu_to_le32(len);
2686 buf[1] = cpu_to_le32(perdatum->value);
2687 rc = put_entry(buf, sizeof(u32), 2, fp);
2688 if (rc)
2689 return rc;
2690
2691 rc = put_entry(key, 1, len, fp);
2692 if (rc)
2693 return rc;
2694
2695 return 0;
2696}
2697
2698static int common_write(void *vkey, void *datum, void *ptr)
2699{
2700 char *key = vkey;
2701 struct common_datum *comdatum = datum;
2702 struct policy_data *pd = ptr;
2703 void *fp = pd->fp;
2704 __le32 buf[4];
2705 size_t len;
2706 int rc;
2707
2708 len = strlen(key);
2709 buf[0] = cpu_to_le32(len);
2710 buf[1] = cpu_to_le32(comdatum->value);
2711 buf[2] = cpu_to_le32(comdatum->permissions.nprim);
2712 buf[3] = cpu_to_le32(comdatum->permissions.table->nel);
2713 rc = put_entry(buf, sizeof(u32), 4, fp);
2714 if (rc)
2715 return rc;
2716
2717 rc = put_entry(key, 1, len, fp);
2718 if (rc)
2719 return rc;
2720
2721 rc = hashtab_map(comdatum->permissions.table, perm_write, fp);
2722 if (rc)
2723 return rc;
2724
2725 return 0;
2726}
2727
2728static int write_cons_helper(struct policydb *p, struct constraint_node *node,
2729 void *fp)
2730{
2731 struct constraint_node *c;
2732 struct constraint_expr *e;
2733 __le32 buf[3];
2734 u32 nel;
2735 int rc;
2736
2737 for (c = node; c; c = c->next) {
2738 nel = 0;
2739 for (e = c->expr; e; e = e->next)
2740 nel++;
2741 buf[0] = cpu_to_le32(c->permissions);
2742 buf[1] = cpu_to_le32(nel);
2743 rc = put_entry(buf, sizeof(u32), 2, fp);
2744 if (rc)
2745 return rc;
2746 for (e = c->expr; e; e = e->next) {
2747 buf[0] = cpu_to_le32(e->expr_type);
2748 buf[1] = cpu_to_le32(e->attr);
2749 buf[2] = cpu_to_le32(e->op);
2750 rc = put_entry(buf, sizeof(u32), 3, fp);
2751 if (rc)
2752 return rc;
2753
2754 switch (e->expr_type) {
2755 case CEXPR_NAMES:
2756 rc = ebitmap_write(&e->names, fp);
2757 if (rc)
2758 return rc;
2759 break;
2760 default:
2761 break;
2762 }
2763 }
2764 }
2765
2766 return 0;
2767}
2768
2769static int class_write(void *vkey, void *datum, void *ptr)
2770{
2771 char *key = vkey;
2772 struct class_datum *cladatum = datum;
2773 struct policy_data *pd = ptr;
2774 void *fp = pd->fp;
2775 struct policydb *p = pd->p;
2776 struct constraint_node *c;
2777 __le32 buf[6];
2778 u32 ncons;
2779 size_t len, len2;
2780 int rc;
2781
2782 len = strlen(key);
2783 if (cladatum->comkey)
2784 len2 = strlen(cladatum->comkey);
2785 else
2786 len2 = 0;
2787
2788 ncons = 0;
2789 for (c = cladatum->constraints; c; c = c->next)
2790 ncons++;
2791
2792 buf[0] = cpu_to_le32(len);
2793 buf[1] = cpu_to_le32(len2);
2794 buf[2] = cpu_to_le32(cladatum->value);
2795 buf[3] = cpu_to_le32(cladatum->permissions.nprim);
2796 if (cladatum->permissions.table)
2797 buf[4] = cpu_to_le32(cladatum->permissions.table->nel);
2798 else
2799 buf[4] = 0;
2800 buf[5] = cpu_to_le32(ncons);
2801 rc = put_entry(buf, sizeof(u32), 6, fp);
2802 if (rc)
2803 return rc;
2804
2805 rc = put_entry(key, 1, len, fp);
2806 if (rc)
2807 return rc;
2808
2809 if (cladatum->comkey) {
2810 rc = put_entry(cladatum->comkey, 1, len2, fp);
2811 if (rc)
2812 return rc;
2813 }
2814
2815 rc = hashtab_map(cladatum->permissions.table, perm_write, fp);
2816 if (rc)
2817 return rc;
2818
2819 rc = write_cons_helper(p, cladatum->constraints, fp);
2820 if (rc)
2821 return rc;
2822
2823 /* write out the validatetrans rule */
2824 ncons = 0;
2825 for (c = cladatum->validatetrans; c; c = c->next)
2826 ncons++;
2827
2828 buf[0] = cpu_to_le32(ncons);
2829 rc = put_entry(buf, sizeof(u32), 1, fp);
2830 if (rc)
2831 return rc;
2832
2833 rc = write_cons_helper(p, cladatum->validatetrans, fp);
2834 if (rc)
2835 return rc;
2836
2837 return 0;
2838}
2839
2840static int role_write(void *vkey, void *datum, void *ptr)
2841{
2842 char *key = vkey;
2843 struct role_datum *role = datum;
2844 struct policy_data *pd = ptr;
2845 void *fp = pd->fp;
2846 struct policydb *p = pd->p;
2847 __le32 buf[3];
2848 size_t items, len;
2849 int rc;
2850
2851 len = strlen(key);
2852 items = 0;
2853 buf[items++] = cpu_to_le32(len);
2854 buf[items++] = cpu_to_le32(role->value);
2855 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
2856 buf[items++] = cpu_to_le32(role->bounds);
2857
2858 BUG_ON(items > (sizeof(buf)/sizeof(buf[0])));
2859
2860 rc = put_entry(buf, sizeof(u32), items, fp);
2861 if (rc)
2862 return rc;
2863
2864 rc = put_entry(key, 1, len, fp);
2865 if (rc)
2866 return rc;
2867
2868 rc = ebitmap_write(&role->dominates, fp);
2869 if (rc)
2870 return rc;
2871
2872 rc = ebitmap_write(&role->types, fp);
2873 if (rc)
2874 return rc;
2875
2876 return 0;
2877}
2878
2879static int type_write(void *vkey, void *datum, void *ptr)
2880{
2881 char *key = vkey;
2882 struct type_datum *typdatum = datum;
2883 struct policy_data *pd = ptr;
2884 struct policydb *p = pd->p;
2885 void *fp = pd->fp;
2886 __le32 buf[4];
2887 int rc;
2888 size_t items, len;
2889
2890 len = strlen(key);
2891 items = 0;
2892 buf[items++] = cpu_to_le32(len);
2893 buf[items++] = cpu_to_le32(typdatum->value);
2894 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
2895 u32 properties = 0;
2896
2897 if (typdatum->primary)
2898 properties |= TYPEDATUM_PROPERTY_PRIMARY;
2899
2900 if (typdatum->attribute)
2901 properties |= TYPEDATUM_PROPERTY_ATTRIBUTE;
2902
2903 buf[items++] = cpu_to_le32(properties);
2904 buf[items++] = cpu_to_le32(typdatum->bounds);
2905 } else {
2906 buf[items++] = cpu_to_le32(typdatum->primary);
2907 }
2908 BUG_ON(items > (sizeof(buf) / sizeof(buf[0])));
2909 rc = put_entry(buf, sizeof(u32), items, fp);
2910 if (rc)
2911 return rc;
2912
2913 rc = put_entry(key, 1, len, fp);
2914 if (rc)
2915 return rc;
2916
2917 return 0;
2918}
2919
2920static int user_write(void *vkey, void *datum, void *ptr)
2921{
2922 char *key = vkey;
2923 struct user_datum *usrdatum = datum;
2924 struct policy_data *pd = ptr;
2925 struct policydb *p = pd->p;
2926 void *fp = pd->fp;
2927 __le32 buf[3];
2928 size_t items, len;
2929 int rc;
2930
2931 len = strlen(key);
2932 items = 0;
2933 buf[items++] = cpu_to_le32(len);
2934 buf[items++] = cpu_to_le32(usrdatum->value);
2935 if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
2936 buf[items++] = cpu_to_le32(usrdatum->bounds);
2937 BUG_ON(items > (sizeof(buf) / sizeof(buf[0])));
2938 rc = put_entry(buf, sizeof(u32), items, fp);
2939 if (rc)
2940 return rc;
2941
2942 rc = put_entry(key, 1, len, fp);
2943 if (rc)
2944 return rc;
2945
2946 rc = ebitmap_write(&usrdatum->roles, fp);
2947 if (rc)
2948 return rc;
2949
2950 rc = mls_write_range_helper(&usrdatum->range, fp);
2951 if (rc)
2952 return rc;
2953
2954 rc = mls_write_level(&usrdatum->dfltlevel, fp);
2955 if (rc)
2956 return rc;
2957
2958 return 0;
2959}
2960
2961static int (*write_f[SYM_NUM]) (void *key, void *datum,
2962 void *datap) =
2963{
2964 common_write,
2965 class_write,
2966 role_write,
2967 type_write,
2968 user_write,
2969 cond_write_bool,
2970 sens_write,
2971 cat_write,
2972};
2973
2974static int ocontext_write(struct policydb *p, struct policydb_compat_info *info,
2975 void *fp)
2976{
2977 unsigned int i, j, rc;
2978 size_t nel, len;
2979 __le32 buf[3];
2980 u32 nodebuf[8];
2981 struct ocontext *c;
2982 for (i = 0; i < info->ocon_num; i++) {
2983 nel = 0;
2984 for (c = p->ocontexts[i]; c; c = c->next)
2985 nel++;
2986 buf[0] = cpu_to_le32(nel);
2987 rc = put_entry(buf, sizeof(u32), 1, fp);
2988 if (rc)
2989 return rc;
2990 for (c = p->ocontexts[i]; c; c = c->next) {
2991 switch (i) {
2992 case OCON_ISID:
2993 buf[0] = cpu_to_le32(c->sid[0]);
2994 rc = put_entry(buf, sizeof(u32), 1, fp);
2995 if (rc)
2996 return rc;
2997 rc = context_write(p, &c->context[0], fp);
2998 if (rc)
2999 return rc;
3000 break;
3001 case OCON_FS:
3002 case OCON_NETIF:
3003 len = strlen(c->u.name);
3004 buf[0] = cpu_to_le32(len);
3005 rc = put_entry(buf, sizeof(u32), 1, fp);
3006 if (rc)
3007 return rc;
3008 rc = put_entry(c->u.name, 1, len, fp);
3009 if (rc)
3010 return rc;
3011 rc = context_write(p, &c->context[0], fp);
3012 if (rc)
3013 return rc;
3014 rc = context_write(p, &c->context[1], fp);
3015 if (rc)
3016 return rc;
3017 break;
3018 case OCON_PORT:
3019 buf[0] = cpu_to_le32(c->u.port.protocol);
3020 buf[1] = cpu_to_le32(c->u.port.low_port);
3021 buf[2] = cpu_to_le32(c->u.port.high_port);
3022 rc = put_entry(buf, sizeof(u32), 3, fp);
3023 if (rc)
3024 return rc;
3025 rc = context_write(p, &c->context[0], fp);
3026 if (rc)
3027 return rc;
3028 break;
3029 case OCON_NODE:
3030 nodebuf[0] = c->u.node.addr; /* network order */
3031 nodebuf[1] = c->u.node.mask; /* network order */
3032 rc = put_entry(nodebuf, sizeof(u32), 2, fp);
3033 if (rc)
3034 return rc;
3035 rc = context_write(p, &c->context[0], fp);
3036 if (rc)
3037 return rc;
3038 break;
3039 case OCON_FSUSE:
3040 buf[0] = cpu_to_le32(c->v.behavior);
3041 len = strlen(c->u.name);
3042 buf[1] = cpu_to_le32(len);
3043 rc = put_entry(buf, sizeof(u32), 2, fp);
3044 if (rc)
3045 return rc;
3046 rc = put_entry(c->u.name, 1, len, fp);
3047 if (rc)
3048 return rc;
3049 rc = context_write(p, &c->context[0], fp);
3050 if (rc)
3051 return rc;
3052 break;
3053 case OCON_NODE6:
3054 for (j = 0; j < 4; j++)
3055 nodebuf[j] = c->u.node6.addr[j]; /* network order */
3056 for (j = 0; j < 4; j++)
3057 nodebuf[j + 4] = c->u.node6.mask[j]; /* network order */
3058 rc = put_entry(nodebuf, sizeof(u32), 8, fp);
3059 if (rc)
3060 return rc;
3061 rc = context_write(p, &c->context[0], fp);
3062 if (rc)
3063 return rc;
3064 break;
3065 }
3066 }
3067 }
3068 return 0;
3069}
3070
3071static int genfs_write(struct policydb *p, void *fp)
3072{
3073 struct genfs *genfs;
3074 struct ocontext *c;
3075 size_t len;
3076 __le32 buf[1];
3077 int rc;
3078
3079 len = 0;
3080 for (genfs = p->genfs; genfs; genfs = genfs->next)
3081 len++;
3082 buf[0] = cpu_to_le32(len);
3083 rc = put_entry(buf, sizeof(u32), 1, fp);
3084 if (rc)
3085 return rc;
3086 for (genfs = p->genfs; genfs; genfs = genfs->next) {
3087 len = strlen(genfs->fstype);
3088 buf[0] = cpu_to_le32(len);
3089 rc = put_entry(buf, sizeof(u32), 1, fp);
3090 if (rc)
3091 return rc;
3092 rc = put_entry(genfs->fstype, 1, len, fp);
3093 if (rc)
3094 return rc;
3095 len = 0;
3096 for (c = genfs->head; c; c = c->next)
3097 len++;
3098 buf[0] = cpu_to_le32(len);
3099 rc = put_entry(buf, sizeof(u32), 1, fp);
3100 if (rc)
3101 return rc;
3102 for (c = genfs->head; c; c = c->next) {
3103 len = strlen(c->u.name);
3104 buf[0] = cpu_to_le32(len);
3105 rc = put_entry(buf, sizeof(u32), 1, fp);
3106 if (rc)
3107 return rc;
3108 rc = put_entry(c->u.name, 1, len, fp);
3109 if (rc)
3110 return rc;
3111 buf[0] = cpu_to_le32(c->v.sclass);
3112 rc = put_entry(buf, sizeof(u32), 1, fp);
3113 if (rc)
3114 return rc;
3115 rc = context_write(p, &c->context[0], fp);
3116 if (rc)
3117 return rc;
3118 }
3119 }
3120 return 0;
3121}
3122
3123static int hashtab_cnt(void *key, void *data, void *ptr)
3124{
3125 int *cnt = ptr;
3126 *cnt = *cnt + 1;
3127
3128 return 0;
3129}
3130
3131static int range_write_helper(void *key, void *data, void *ptr)
3132{
3133 __le32 buf[2];
3134 struct range_trans *rt = key;
3135 struct mls_range *r = data;
3136 struct policy_data *pd = ptr;
3137 void *fp = pd->fp;
3138 struct policydb *p = pd->p;
3139 int rc;
3140
3141 buf[0] = cpu_to_le32(rt->source_type);
3142 buf[1] = cpu_to_le32(rt->target_type);
3143 rc = put_entry(buf, sizeof(u32), 2, fp);
3144 if (rc)
3145 return rc;
3146 if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
3147 buf[0] = cpu_to_le32(rt->target_class);
3148 rc = put_entry(buf, sizeof(u32), 1, fp);
3149 if (rc)
3150 return rc;
3151 }
3152 rc = mls_write_range_helper(r, fp);
3153 if (rc)
3154 return rc;
3155
3156 return 0;
3157}
3158
3159static int range_write(struct policydb *p, void *fp)
3160{
3161 size_t nel;
3162 __le32 buf[1];
3163 int rc;
3164 struct policy_data pd;
3165
3166 pd.p = p;
3167 pd.fp = fp;
3168
3169 /* count the number of entries in the hashtab */
3170 nel = 0;
3171 rc = hashtab_map(p->range_tr, hashtab_cnt, &nel);
3172 if (rc)
3173 return rc;
3174
3175 buf[0] = cpu_to_le32(nel);
3176 rc = put_entry(buf, sizeof(u32), 1, fp);
3177 if (rc)
3178 return rc;
3179
3180 /* actually write all of the entries */
3181 rc = hashtab_map(p->range_tr, range_write_helper, &pd);
3182 if (rc)
3183 return rc;
3184
3185 return 0;
3186}
3187
3188static int filename_write_helper(void *key, void *data, void *ptr)
3189{
3190 __le32 buf[4];
3191 struct filename_trans *ft = key;
3192 struct filename_trans_datum *otype = data;
3193 void *fp = ptr;
3194 int rc;
3195 u32 len;
3196
3197 len = strlen(ft->name);
3198 buf[0] = cpu_to_le32(len);
3199 rc = put_entry(buf, sizeof(u32), 1, fp);
3200 if (rc)
3201 return rc;
3202
3203 rc = put_entry(ft->name, sizeof(char), len, fp);
3204 if (rc)
3205 return rc;
3206
3207 buf[0] = ft->stype;
3208 buf[1] = ft->ttype;
3209 buf[2] = ft->tclass;
3210 buf[3] = otype->otype;
3211
3212 rc = put_entry(buf, sizeof(u32), 4, fp);
3213 if (rc)
3214 return rc;
3215
3216 return 0;
3217}
3218
3219static int filename_trans_write(struct policydb *p, void *fp)
3220{
3221 u32 nel;
3222 __le32 buf[1];
3223 int rc;
3224
3225 if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
3226 return 0;
3227
3228 nel = 0;
3229 rc = hashtab_map(p->filename_trans, hashtab_cnt, &nel);
3230 if (rc)
3231 return rc;
3232
3233 buf[0] = cpu_to_le32(nel);
3234 rc = put_entry(buf, sizeof(u32), 1, fp);
3235 if (rc)
3236 return rc;
3237
3238 rc = hashtab_map(p->filename_trans, filename_write_helper, fp);
3239 if (rc)
3240 return rc;
3241
3242 return 0;
3243}
3244
3245/*
3246 * Write the configuration data in a policy database
3247 * structure to a policy database binary representation
3248 * file.
3249 */
3250int policydb_write(struct policydb *p, void *fp)
3251{
3252 unsigned int i, num_syms;
3253 int rc;
3254 __le32 buf[4];
3255 u32 config;
3256 size_t len;
3257 struct policydb_compat_info *info;
3258
3259 /*
3260 * refuse to write policy older than compressed avtab
3261 * to simplify the writer. There are other tests dropped
3262 * since we assume this throughout the writer code. Be
3263 * careful if you ever try to remove this restriction
3264 */
3265 if (p->policyvers < POLICYDB_VERSION_AVTAB) {
3266 printk(KERN_ERR "SELinux: refusing to write policy version %d."
3267 " Because it is less than version %d\n", p->policyvers,
3268 POLICYDB_VERSION_AVTAB);
3269 return -EINVAL;
3270 }
3271
3272 config = 0;
3273 if (p->mls_enabled)
3274 config |= POLICYDB_CONFIG_MLS;
3275
3276 if (p->reject_unknown)
3277 config |= REJECT_UNKNOWN;
3278 if (p->allow_unknown)
3279 config |= ALLOW_UNKNOWN;
3280
3281 /* Write the magic number and string identifiers. */
3282 buf[0] = cpu_to_le32(POLICYDB_MAGIC);
3283 len = strlen(POLICYDB_STRING);
3284 buf[1] = cpu_to_le32(len);
3285 rc = put_entry(buf, sizeof(u32), 2, fp);
3286 if (rc)
3287 return rc;
3288 rc = put_entry(POLICYDB_STRING, 1, len, fp);
3289 if (rc)
3290 return rc;
3291
3292 /* Write the version, config, and table sizes. */
3293 info = policydb_lookup_compat(p->policyvers);
3294 if (!info) {
3295 printk(KERN_ERR "SELinux: compatibility lookup failed for policy "
3296 "version %d", p->policyvers);
3297 return -EINVAL;
3298 }
3299
3300 buf[0] = cpu_to_le32(p->policyvers);
3301 buf[1] = cpu_to_le32(config);
3302 buf[2] = cpu_to_le32(info->sym_num);
3303 buf[3] = cpu_to_le32(info->ocon_num);
3304
3305 rc = put_entry(buf, sizeof(u32), 4, fp);
3306 if (rc)
3307 return rc;
3308
3309 if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
3310 rc = ebitmap_write(&p->policycaps, fp);
3311 if (rc)
3312 return rc;
3313 }
3314
3315 if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
3316 rc = ebitmap_write(&p->permissive_map, fp);
3317 if (rc)
3318 return rc;
3319 }
3320
3321 num_syms = info->sym_num;
3322 for (i = 0; i < num_syms; i++) {
3323 struct policy_data pd;
3324
3325 pd.fp = fp;
3326 pd.p = p;
3327
3328 buf[0] = cpu_to_le32(p->symtab[i].nprim);
3329 buf[1] = cpu_to_le32(p->symtab[i].table->nel);
3330
3331 rc = put_entry(buf, sizeof(u32), 2, fp);
3332 if (rc)
3333 return rc;
3334 rc = hashtab_map(p->symtab[i].table, write_f[i], &pd);
3335 if (rc)
3336 return rc;
3337 }
3338
3339 rc = avtab_write(p, &p->te_avtab, fp);
3340 if (rc)
3341 return rc;
3342
3343 rc = cond_write_list(p, p->cond_list, fp);
3344 if (rc)
3345 return rc;
3346
3347 rc = role_trans_write(p, fp);
3348 if (rc)
3349 return rc;
3350
3351 rc = role_allow_write(p->role_allow, fp);
3352 if (rc)
3353 return rc;
3354
3355 rc = filename_trans_write(p, fp);
3356 if (rc)
3357 return rc;
3358
3359 rc = ocontext_write(p, info, fp);
3360 if (rc)
3361 return rc;
3362
3363 rc = genfs_write(p, fp);
3364 if (rc)
3365 return rc;
3366
3367 rc = range_write(p, fp);
3368 if (rc)
3369 return rc;
3370
3371 for (i = 0; i < p->p_types.nprim; i++) {
3372 struct ebitmap *e = flex_array_get(p->type_attr_map_array, i);
3373
3374 BUG_ON(!e);
3375 rc = ebitmap_write(e, fp);
3376 if (rc)
3377 return rc;
3378 }
3379
3380 return 0;
3381}