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1/*
2 * Security plug functions
3 *
4 * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com>
5 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
6 * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 */
13
14#include <linux/capability.h>
15#include <linux/dcache.h>
16#include <linux/module.h>
17#include <linux/init.h>
18#include <linux/kernel.h>
19#include <linux/security.h>
20#include <linux/integrity.h>
21#include <linux/ima.h>
22#include <linux/evm.h>
23#include <linux/fsnotify.h>
24#include <linux/mman.h>
25#include <linux/mount.h>
26#include <linux/personality.h>
27#include <linux/backing-dev.h>
28#include <net/flow.h>
29
30#define MAX_LSM_EVM_XATTR 2
31
32/* Boot-time LSM user choice */
33static __initdata char chosen_lsm[SECURITY_NAME_MAX + 1] =
34 CONFIG_DEFAULT_SECURITY;
35
36static struct security_operations *security_ops;
37static struct security_operations default_security_ops = {
38 .name = "default",
39};
40
41static inline int __init verify(struct security_operations *ops)
42{
43 /* verify the security_operations structure exists */
44 if (!ops)
45 return -EINVAL;
46 security_fixup_ops(ops);
47 return 0;
48}
49
50static void __init do_security_initcalls(void)
51{
52 initcall_t *call;
53 call = __security_initcall_start;
54 while (call < __security_initcall_end) {
55 (*call) ();
56 call++;
57 }
58}
59
60/**
61 * security_init - initializes the security framework
62 *
63 * This should be called early in the kernel initialization sequence.
64 */
65int __init security_init(void)
66{
67 printk(KERN_INFO "Security Framework initialized\n");
68
69 security_fixup_ops(&default_security_ops);
70 security_ops = &default_security_ops;
71 do_security_initcalls();
72
73 return 0;
74}
75
76void reset_security_ops(void)
77{
78 security_ops = &default_security_ops;
79}
80
81/* Save user chosen LSM */
82static int __init choose_lsm(char *str)
83{
84 strncpy(chosen_lsm, str, SECURITY_NAME_MAX);
85 return 1;
86}
87__setup("security=", choose_lsm);
88
89/**
90 * security_module_enable - Load given security module on boot ?
91 * @ops: a pointer to the struct security_operations that is to be checked.
92 *
93 * Each LSM must pass this method before registering its own operations
94 * to avoid security registration races. This method may also be used
95 * to check if your LSM is currently loaded during kernel initialization.
96 *
97 * Return true if:
98 * -The passed LSM is the one chosen by user at boot time,
99 * -or the passed LSM is configured as the default and the user did not
100 * choose an alternate LSM at boot time.
101 * Otherwise, return false.
102 */
103int __init security_module_enable(struct security_operations *ops)
104{
105 return !strcmp(ops->name, chosen_lsm);
106}
107
108/**
109 * register_security - registers a security framework with the kernel
110 * @ops: a pointer to the struct security_options that is to be registered
111 *
112 * This function allows a security module to register itself with the
113 * kernel security subsystem. Some rudimentary checking is done on the @ops
114 * value passed to this function. You'll need to check first if your LSM
115 * is allowed to register its @ops by calling security_module_enable(@ops).
116 *
117 * If there is already a security module registered with the kernel,
118 * an error will be returned. Otherwise %0 is returned on success.
119 */
120int __init register_security(struct security_operations *ops)
121{
122 if (verify(ops)) {
123 printk(KERN_DEBUG "%s could not verify "
124 "security_operations structure.\n", __func__);
125 return -EINVAL;
126 }
127
128 if (security_ops != &default_security_ops)
129 return -EAGAIN;
130
131 security_ops = ops;
132
133 return 0;
134}
135
136/* Security operations */
137
138int security_ptrace_access_check(struct task_struct *child, unsigned int mode)
139{
140#ifdef CONFIG_SECURITY_YAMA_STACKED
141 int rc;
142 rc = yama_ptrace_access_check(child, mode);
143 if (rc)
144 return rc;
145#endif
146 return security_ops->ptrace_access_check(child, mode);
147}
148
149int security_ptrace_traceme(struct task_struct *parent)
150{
151#ifdef CONFIG_SECURITY_YAMA_STACKED
152 int rc;
153 rc = yama_ptrace_traceme(parent);
154 if (rc)
155 return rc;
156#endif
157 return security_ops->ptrace_traceme(parent);
158}
159
160int security_capget(struct task_struct *target,
161 kernel_cap_t *effective,
162 kernel_cap_t *inheritable,
163 kernel_cap_t *permitted)
164{
165 return security_ops->capget(target, effective, inheritable, permitted);
166}
167
168int security_capset(struct cred *new, const struct cred *old,
169 const kernel_cap_t *effective,
170 const kernel_cap_t *inheritable,
171 const kernel_cap_t *permitted)
172{
173 return security_ops->capset(new, old,
174 effective, inheritable, permitted);
175}
176
177int security_capable(const struct cred *cred, struct user_namespace *ns,
178 int cap)
179{
180 return security_ops->capable(cred, ns, cap, SECURITY_CAP_AUDIT);
181}
182
183int security_capable_noaudit(const struct cred *cred, struct user_namespace *ns,
184 int cap)
185{
186 return security_ops->capable(cred, ns, cap, SECURITY_CAP_NOAUDIT);
187}
188
189int security_quotactl(int cmds, int type, int id, struct super_block *sb)
190{
191 return security_ops->quotactl(cmds, type, id, sb);
192}
193
194int security_quota_on(struct dentry *dentry)
195{
196 return security_ops->quota_on(dentry);
197}
198
199int security_syslog(int type)
200{
201 return security_ops->syslog(type);
202}
203
204int security_settime(const struct timespec *ts, const struct timezone *tz)
205{
206 return security_ops->settime(ts, tz);
207}
208
209int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
210{
211 return security_ops->vm_enough_memory(mm, pages);
212}
213
214int security_bprm_set_creds(struct linux_binprm *bprm)
215{
216 return security_ops->bprm_set_creds(bprm);
217}
218
219int security_bprm_check(struct linux_binprm *bprm)
220{
221 int ret;
222
223 ret = security_ops->bprm_check_security(bprm);
224 if (ret)
225 return ret;
226 return ima_bprm_check(bprm);
227}
228
229void security_bprm_committing_creds(struct linux_binprm *bprm)
230{
231 security_ops->bprm_committing_creds(bprm);
232}
233
234void security_bprm_committed_creds(struct linux_binprm *bprm)
235{
236 security_ops->bprm_committed_creds(bprm);
237}
238
239int security_bprm_secureexec(struct linux_binprm *bprm)
240{
241 return security_ops->bprm_secureexec(bprm);
242}
243
244int security_sb_alloc(struct super_block *sb)
245{
246 return security_ops->sb_alloc_security(sb);
247}
248
249void security_sb_free(struct super_block *sb)
250{
251 security_ops->sb_free_security(sb);
252}
253
254int security_sb_copy_data(char *orig, char *copy)
255{
256 return security_ops->sb_copy_data(orig, copy);
257}
258EXPORT_SYMBOL(security_sb_copy_data);
259
260int security_sb_remount(struct super_block *sb, void *data)
261{
262 return security_ops->sb_remount(sb, data);
263}
264
265int security_sb_kern_mount(struct super_block *sb, int flags, void *data)
266{
267 return security_ops->sb_kern_mount(sb, flags, data);
268}
269
270int security_sb_show_options(struct seq_file *m, struct super_block *sb)
271{
272 return security_ops->sb_show_options(m, sb);
273}
274
275int security_sb_statfs(struct dentry *dentry)
276{
277 return security_ops->sb_statfs(dentry);
278}
279
280int security_sb_mount(const char *dev_name, struct path *path,
281 const char *type, unsigned long flags, void *data)
282{
283 return security_ops->sb_mount(dev_name, path, type, flags, data);
284}
285
286int security_sb_umount(struct vfsmount *mnt, int flags)
287{
288 return security_ops->sb_umount(mnt, flags);
289}
290
291int security_sb_pivotroot(struct path *old_path, struct path *new_path)
292{
293 return security_ops->sb_pivotroot(old_path, new_path);
294}
295
296int security_sb_set_mnt_opts(struct super_block *sb,
297 struct security_mnt_opts *opts,
298 unsigned long kern_flags,
299 unsigned long *set_kern_flags)
300{
301 return security_ops->sb_set_mnt_opts(sb, opts, kern_flags,
302 set_kern_flags);
303}
304EXPORT_SYMBOL(security_sb_set_mnt_opts);
305
306int security_sb_clone_mnt_opts(const struct super_block *oldsb,
307 struct super_block *newsb)
308{
309 return security_ops->sb_clone_mnt_opts(oldsb, newsb);
310}
311EXPORT_SYMBOL(security_sb_clone_mnt_opts);
312
313int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts)
314{
315 return security_ops->sb_parse_opts_str(options, opts);
316}
317EXPORT_SYMBOL(security_sb_parse_opts_str);
318
319int security_inode_alloc(struct inode *inode)
320{
321 inode->i_security = NULL;
322 return security_ops->inode_alloc_security(inode);
323}
324
325void security_inode_free(struct inode *inode)
326{
327 integrity_inode_free(inode);
328 security_ops->inode_free_security(inode);
329}
330
331int security_dentry_init_security(struct dentry *dentry, int mode,
332 struct qstr *name, void **ctx,
333 u32 *ctxlen)
334{
335 return security_ops->dentry_init_security(dentry, mode, name,
336 ctx, ctxlen);
337}
338EXPORT_SYMBOL(security_dentry_init_security);
339
340int security_inode_init_security(struct inode *inode, struct inode *dir,
341 const struct qstr *qstr,
342 const initxattrs initxattrs, void *fs_data)
343{
344 struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1];
345 struct xattr *lsm_xattr, *evm_xattr, *xattr;
346 int ret;
347
348 if (unlikely(IS_PRIVATE(inode)))
349 return 0;
350
351 if (!initxattrs)
352 return security_ops->inode_init_security(inode, dir, qstr,
353 NULL, NULL, NULL);
354 memset(new_xattrs, 0, sizeof(new_xattrs));
355 lsm_xattr = new_xattrs;
356 ret = security_ops->inode_init_security(inode, dir, qstr,
357 &lsm_xattr->name,
358 &lsm_xattr->value,
359 &lsm_xattr->value_len);
360 if (ret)
361 goto out;
362
363 evm_xattr = lsm_xattr + 1;
364 ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr);
365 if (ret)
366 goto out;
367 ret = initxattrs(inode, new_xattrs, fs_data);
368out:
369 for (xattr = new_xattrs; xattr->value != NULL; xattr++)
370 kfree(xattr->value);
371 return (ret == -EOPNOTSUPP) ? 0 : ret;
372}
373EXPORT_SYMBOL(security_inode_init_security);
374
375int security_old_inode_init_security(struct inode *inode, struct inode *dir,
376 const struct qstr *qstr, const char **name,
377 void **value, size_t *len)
378{
379 if (unlikely(IS_PRIVATE(inode)))
380 return -EOPNOTSUPP;
381 return security_ops->inode_init_security(inode, dir, qstr, name, value,
382 len);
383}
384EXPORT_SYMBOL(security_old_inode_init_security);
385
386#ifdef CONFIG_SECURITY_PATH
387int security_path_mknod(struct path *dir, struct dentry *dentry, umode_t mode,
388 unsigned int dev)
389{
390 if (unlikely(IS_PRIVATE(dir->dentry->d_inode)))
391 return 0;
392 return security_ops->path_mknod(dir, dentry, mode, dev);
393}
394EXPORT_SYMBOL(security_path_mknod);
395
396int security_path_mkdir(struct path *dir, struct dentry *dentry, umode_t mode)
397{
398 if (unlikely(IS_PRIVATE(dir->dentry->d_inode)))
399 return 0;
400 return security_ops->path_mkdir(dir, dentry, mode);
401}
402EXPORT_SYMBOL(security_path_mkdir);
403
404int security_path_rmdir(struct path *dir, struct dentry *dentry)
405{
406 if (unlikely(IS_PRIVATE(dir->dentry->d_inode)))
407 return 0;
408 return security_ops->path_rmdir(dir, dentry);
409}
410
411int security_path_unlink(struct path *dir, struct dentry *dentry)
412{
413 if (unlikely(IS_PRIVATE(dir->dentry->d_inode)))
414 return 0;
415 return security_ops->path_unlink(dir, dentry);
416}
417EXPORT_SYMBOL(security_path_unlink);
418
419int security_path_symlink(struct path *dir, struct dentry *dentry,
420 const char *old_name)
421{
422 if (unlikely(IS_PRIVATE(dir->dentry->d_inode)))
423 return 0;
424 return security_ops->path_symlink(dir, dentry, old_name);
425}
426
427int security_path_link(struct dentry *old_dentry, struct path *new_dir,
428 struct dentry *new_dentry)
429{
430 if (unlikely(IS_PRIVATE(old_dentry->d_inode)))
431 return 0;
432 return security_ops->path_link(old_dentry, new_dir, new_dentry);
433}
434
435int security_path_rename(struct path *old_dir, struct dentry *old_dentry,
436 struct path *new_dir, struct dentry *new_dentry,
437 unsigned int flags)
438{
439 if (unlikely(IS_PRIVATE(old_dentry->d_inode) ||
440 (new_dentry->d_inode && IS_PRIVATE(new_dentry->d_inode))))
441 return 0;
442
443 if (flags & RENAME_EXCHANGE) {
444 int err = security_ops->path_rename(new_dir, new_dentry,
445 old_dir, old_dentry);
446 if (err)
447 return err;
448 }
449
450 return security_ops->path_rename(old_dir, old_dentry, new_dir,
451 new_dentry);
452}
453EXPORT_SYMBOL(security_path_rename);
454
455int security_path_truncate(struct path *path)
456{
457 if (unlikely(IS_PRIVATE(path->dentry->d_inode)))
458 return 0;
459 return security_ops->path_truncate(path);
460}
461
462int security_path_chmod(struct path *path, umode_t mode)
463{
464 if (unlikely(IS_PRIVATE(path->dentry->d_inode)))
465 return 0;
466 return security_ops->path_chmod(path, mode);
467}
468
469int security_path_chown(struct path *path, kuid_t uid, kgid_t gid)
470{
471 if (unlikely(IS_PRIVATE(path->dentry->d_inode)))
472 return 0;
473 return security_ops->path_chown(path, uid, gid);
474}
475
476int security_path_chroot(struct path *path)
477{
478 return security_ops->path_chroot(path);
479}
480#endif
481
482int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode)
483{
484 if (unlikely(IS_PRIVATE(dir)))
485 return 0;
486 return security_ops->inode_create(dir, dentry, mode);
487}
488EXPORT_SYMBOL_GPL(security_inode_create);
489
490int security_inode_link(struct dentry *old_dentry, struct inode *dir,
491 struct dentry *new_dentry)
492{
493 if (unlikely(IS_PRIVATE(old_dentry->d_inode)))
494 return 0;
495 return security_ops->inode_link(old_dentry, dir, new_dentry);
496}
497
498int security_inode_unlink(struct inode *dir, struct dentry *dentry)
499{
500 if (unlikely(IS_PRIVATE(dentry->d_inode)))
501 return 0;
502 return security_ops->inode_unlink(dir, dentry);
503}
504
505int security_inode_symlink(struct inode *dir, struct dentry *dentry,
506 const char *old_name)
507{
508 if (unlikely(IS_PRIVATE(dir)))
509 return 0;
510 return security_ops->inode_symlink(dir, dentry, old_name);
511}
512
513int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
514{
515 if (unlikely(IS_PRIVATE(dir)))
516 return 0;
517 return security_ops->inode_mkdir(dir, dentry, mode);
518}
519EXPORT_SYMBOL_GPL(security_inode_mkdir);
520
521int security_inode_rmdir(struct inode *dir, struct dentry *dentry)
522{
523 if (unlikely(IS_PRIVATE(dentry->d_inode)))
524 return 0;
525 return security_ops->inode_rmdir(dir, dentry);
526}
527
528int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev)
529{
530 if (unlikely(IS_PRIVATE(dir)))
531 return 0;
532 return security_ops->inode_mknod(dir, dentry, mode, dev);
533}
534
535int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry,
536 struct inode *new_dir, struct dentry *new_dentry,
537 unsigned int flags)
538{
539 if (unlikely(IS_PRIVATE(old_dentry->d_inode) ||
540 (new_dentry->d_inode && IS_PRIVATE(new_dentry->d_inode))))
541 return 0;
542
543 if (flags & RENAME_EXCHANGE) {
544 int err = security_ops->inode_rename(new_dir, new_dentry,
545 old_dir, old_dentry);
546 if (err)
547 return err;
548 }
549
550 return security_ops->inode_rename(old_dir, old_dentry,
551 new_dir, new_dentry);
552}
553
554int security_inode_readlink(struct dentry *dentry)
555{
556 if (unlikely(IS_PRIVATE(dentry->d_inode)))
557 return 0;
558 return security_ops->inode_readlink(dentry);
559}
560
561int security_inode_follow_link(struct dentry *dentry, struct nameidata *nd)
562{
563 if (unlikely(IS_PRIVATE(dentry->d_inode)))
564 return 0;
565 return security_ops->inode_follow_link(dentry, nd);
566}
567
568int security_inode_permission(struct inode *inode, int mask)
569{
570 if (unlikely(IS_PRIVATE(inode)))
571 return 0;
572 return security_ops->inode_permission(inode, mask);
573}
574
575int security_inode_setattr(struct dentry *dentry, struct iattr *attr)
576{
577 int ret;
578
579 if (unlikely(IS_PRIVATE(dentry->d_inode)))
580 return 0;
581 ret = security_ops->inode_setattr(dentry, attr);
582 if (ret)
583 return ret;
584 return evm_inode_setattr(dentry, attr);
585}
586EXPORT_SYMBOL_GPL(security_inode_setattr);
587
588int security_inode_getattr(struct vfsmount *mnt, struct dentry *dentry)
589{
590 if (unlikely(IS_PRIVATE(dentry->d_inode)))
591 return 0;
592 return security_ops->inode_getattr(mnt, dentry);
593}
594
595int security_inode_setxattr(struct dentry *dentry, const char *name,
596 const void *value, size_t size, int flags)
597{
598 int ret;
599
600 if (unlikely(IS_PRIVATE(dentry->d_inode)))
601 return 0;
602 ret = security_ops->inode_setxattr(dentry, name, value, size, flags);
603 if (ret)
604 return ret;
605 ret = ima_inode_setxattr(dentry, name, value, size);
606 if (ret)
607 return ret;
608 return evm_inode_setxattr(dentry, name, value, size);
609}
610
611void security_inode_post_setxattr(struct dentry *dentry, const char *name,
612 const void *value, size_t size, int flags)
613{
614 if (unlikely(IS_PRIVATE(dentry->d_inode)))
615 return;
616 security_ops->inode_post_setxattr(dentry, name, value, size, flags);
617 evm_inode_post_setxattr(dentry, name, value, size);
618}
619
620int security_inode_getxattr(struct dentry *dentry, const char *name)
621{
622 if (unlikely(IS_PRIVATE(dentry->d_inode)))
623 return 0;
624 return security_ops->inode_getxattr(dentry, name);
625}
626
627int security_inode_listxattr(struct dentry *dentry)
628{
629 if (unlikely(IS_PRIVATE(dentry->d_inode)))
630 return 0;
631 return security_ops->inode_listxattr(dentry);
632}
633
634int security_inode_removexattr(struct dentry *dentry, const char *name)
635{
636 int ret;
637
638 if (unlikely(IS_PRIVATE(dentry->d_inode)))
639 return 0;
640 ret = security_ops->inode_removexattr(dentry, name);
641 if (ret)
642 return ret;
643 ret = ima_inode_removexattr(dentry, name);
644 if (ret)
645 return ret;
646 return evm_inode_removexattr(dentry, name);
647}
648
649int security_inode_need_killpriv(struct dentry *dentry)
650{
651 return security_ops->inode_need_killpriv(dentry);
652}
653
654int security_inode_killpriv(struct dentry *dentry)
655{
656 return security_ops->inode_killpriv(dentry);
657}
658
659int security_inode_getsecurity(const struct inode *inode, const char *name, void **buffer, bool alloc)
660{
661 if (unlikely(IS_PRIVATE(inode)))
662 return -EOPNOTSUPP;
663 return security_ops->inode_getsecurity(inode, name, buffer, alloc);
664}
665
666int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
667{
668 if (unlikely(IS_PRIVATE(inode)))
669 return -EOPNOTSUPP;
670 return security_ops->inode_setsecurity(inode, name, value, size, flags);
671}
672
673int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
674{
675 if (unlikely(IS_PRIVATE(inode)))
676 return 0;
677 return security_ops->inode_listsecurity(inode, buffer, buffer_size);
678}
679EXPORT_SYMBOL(security_inode_listsecurity);
680
681void security_inode_getsecid(const struct inode *inode, u32 *secid)
682{
683 security_ops->inode_getsecid(inode, secid);
684}
685
686int security_file_permission(struct file *file, int mask)
687{
688 int ret;
689
690 ret = security_ops->file_permission(file, mask);
691 if (ret)
692 return ret;
693
694 return fsnotify_perm(file, mask);
695}
696
697int security_file_alloc(struct file *file)
698{
699 return security_ops->file_alloc_security(file);
700}
701
702void security_file_free(struct file *file)
703{
704 security_ops->file_free_security(file);
705}
706
707int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
708{
709 return security_ops->file_ioctl(file, cmd, arg);
710}
711
712static inline unsigned long mmap_prot(struct file *file, unsigned long prot)
713{
714 /*
715 * Does we have PROT_READ and does the application expect
716 * it to imply PROT_EXEC? If not, nothing to talk about...
717 */
718 if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ)
719 return prot;
720 if (!(current->personality & READ_IMPLIES_EXEC))
721 return prot;
722 /*
723 * if that's an anonymous mapping, let it.
724 */
725 if (!file)
726 return prot | PROT_EXEC;
727 /*
728 * ditto if it's not on noexec mount, except that on !MMU we need
729 * BDI_CAP_EXEC_MMAP (== VM_MAYEXEC) in this case
730 */
731 if (!(file->f_path.mnt->mnt_flags & MNT_NOEXEC)) {
732#ifndef CONFIG_MMU
733 unsigned long caps = 0;
734 struct address_space *mapping = file->f_mapping;
735 if (mapping && mapping->backing_dev_info)
736 caps = mapping->backing_dev_info->capabilities;
737 if (!(caps & BDI_CAP_EXEC_MAP))
738 return prot;
739#endif
740 return prot | PROT_EXEC;
741 }
742 /* anything on noexec mount won't get PROT_EXEC */
743 return prot;
744}
745
746int security_mmap_file(struct file *file, unsigned long prot,
747 unsigned long flags)
748{
749 int ret;
750 ret = security_ops->mmap_file(file, prot,
751 mmap_prot(file, prot), flags);
752 if (ret)
753 return ret;
754 return ima_file_mmap(file, prot);
755}
756
757int security_mmap_addr(unsigned long addr)
758{
759 return security_ops->mmap_addr(addr);
760}
761
762int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot,
763 unsigned long prot)
764{
765 return security_ops->file_mprotect(vma, reqprot, prot);
766}
767
768int security_file_lock(struct file *file, unsigned int cmd)
769{
770 return security_ops->file_lock(file, cmd);
771}
772
773int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
774{
775 return security_ops->file_fcntl(file, cmd, arg);
776}
777
778int security_file_set_fowner(struct file *file)
779{
780 return security_ops->file_set_fowner(file);
781}
782
783int security_file_send_sigiotask(struct task_struct *tsk,
784 struct fown_struct *fown, int sig)
785{
786 return security_ops->file_send_sigiotask(tsk, fown, sig);
787}
788
789int security_file_receive(struct file *file)
790{
791 return security_ops->file_receive(file);
792}
793
794int security_file_open(struct file *file, const struct cred *cred)
795{
796 int ret;
797
798 ret = security_ops->file_open(file, cred);
799 if (ret)
800 return ret;
801
802 return fsnotify_perm(file, MAY_OPEN);
803}
804
805int security_task_create(unsigned long clone_flags)
806{
807 return security_ops->task_create(clone_flags);
808}
809
810void security_task_free(struct task_struct *task)
811{
812#ifdef CONFIG_SECURITY_YAMA_STACKED
813 yama_task_free(task);
814#endif
815 security_ops->task_free(task);
816}
817
818int security_cred_alloc_blank(struct cred *cred, gfp_t gfp)
819{
820 return security_ops->cred_alloc_blank(cred, gfp);
821}
822
823void security_cred_free(struct cred *cred)
824{
825 security_ops->cred_free(cred);
826}
827
828int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp)
829{
830 return security_ops->cred_prepare(new, old, gfp);
831}
832
833void security_transfer_creds(struct cred *new, const struct cred *old)
834{
835 security_ops->cred_transfer(new, old);
836}
837
838int security_kernel_act_as(struct cred *new, u32 secid)
839{
840 return security_ops->kernel_act_as(new, secid);
841}
842
843int security_kernel_create_files_as(struct cred *new, struct inode *inode)
844{
845 return security_ops->kernel_create_files_as(new, inode);
846}
847
848int security_kernel_module_request(char *kmod_name)
849{
850 return security_ops->kernel_module_request(kmod_name);
851}
852
853int security_kernel_module_from_file(struct file *file)
854{
855 int ret;
856
857 ret = security_ops->kernel_module_from_file(file);
858 if (ret)
859 return ret;
860 return ima_module_check(file);
861}
862
863int security_task_fix_setuid(struct cred *new, const struct cred *old,
864 int flags)
865{
866 return security_ops->task_fix_setuid(new, old, flags);
867}
868
869int security_task_setpgid(struct task_struct *p, pid_t pgid)
870{
871 return security_ops->task_setpgid(p, pgid);
872}
873
874int security_task_getpgid(struct task_struct *p)
875{
876 return security_ops->task_getpgid(p);
877}
878
879int security_task_getsid(struct task_struct *p)
880{
881 return security_ops->task_getsid(p);
882}
883
884void security_task_getsecid(struct task_struct *p, u32 *secid)
885{
886 security_ops->task_getsecid(p, secid);
887}
888EXPORT_SYMBOL(security_task_getsecid);
889
890int security_task_setnice(struct task_struct *p, int nice)
891{
892 return security_ops->task_setnice(p, nice);
893}
894
895int security_task_setioprio(struct task_struct *p, int ioprio)
896{
897 return security_ops->task_setioprio(p, ioprio);
898}
899
900int security_task_getioprio(struct task_struct *p)
901{
902 return security_ops->task_getioprio(p);
903}
904
905int security_task_setrlimit(struct task_struct *p, unsigned int resource,
906 struct rlimit *new_rlim)
907{
908 return security_ops->task_setrlimit(p, resource, new_rlim);
909}
910
911int security_task_setscheduler(struct task_struct *p)
912{
913 return security_ops->task_setscheduler(p);
914}
915
916int security_task_getscheduler(struct task_struct *p)
917{
918 return security_ops->task_getscheduler(p);
919}
920
921int security_task_movememory(struct task_struct *p)
922{
923 return security_ops->task_movememory(p);
924}
925
926int security_task_kill(struct task_struct *p, struct siginfo *info,
927 int sig, u32 secid)
928{
929 return security_ops->task_kill(p, info, sig, secid);
930}
931
932int security_task_wait(struct task_struct *p)
933{
934 return security_ops->task_wait(p);
935}
936
937int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
938 unsigned long arg4, unsigned long arg5)
939{
940#ifdef CONFIG_SECURITY_YAMA_STACKED
941 int rc;
942 rc = yama_task_prctl(option, arg2, arg3, arg4, arg5);
943 if (rc != -ENOSYS)
944 return rc;
945#endif
946 return security_ops->task_prctl(option, arg2, arg3, arg4, arg5);
947}
948
949void security_task_to_inode(struct task_struct *p, struct inode *inode)
950{
951 security_ops->task_to_inode(p, inode);
952}
953
954int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
955{
956 return security_ops->ipc_permission(ipcp, flag);
957}
958
959void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
960{
961 security_ops->ipc_getsecid(ipcp, secid);
962}
963
964int security_msg_msg_alloc(struct msg_msg *msg)
965{
966 return security_ops->msg_msg_alloc_security(msg);
967}
968
969void security_msg_msg_free(struct msg_msg *msg)
970{
971 security_ops->msg_msg_free_security(msg);
972}
973
974int security_msg_queue_alloc(struct msg_queue *msq)
975{
976 return security_ops->msg_queue_alloc_security(msq);
977}
978
979void security_msg_queue_free(struct msg_queue *msq)
980{
981 security_ops->msg_queue_free_security(msq);
982}
983
984int security_msg_queue_associate(struct msg_queue *msq, int msqflg)
985{
986 return security_ops->msg_queue_associate(msq, msqflg);
987}
988
989int security_msg_queue_msgctl(struct msg_queue *msq, int cmd)
990{
991 return security_ops->msg_queue_msgctl(msq, cmd);
992}
993
994int security_msg_queue_msgsnd(struct msg_queue *msq,
995 struct msg_msg *msg, int msqflg)
996{
997 return security_ops->msg_queue_msgsnd(msq, msg, msqflg);
998}
999
1000int security_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
1001 struct task_struct *target, long type, int mode)
1002{
1003 return security_ops->msg_queue_msgrcv(msq, msg, target, type, mode);
1004}
1005
1006int security_shm_alloc(struct shmid_kernel *shp)
1007{
1008 return security_ops->shm_alloc_security(shp);
1009}
1010
1011void security_shm_free(struct shmid_kernel *shp)
1012{
1013 security_ops->shm_free_security(shp);
1014}
1015
1016int security_shm_associate(struct shmid_kernel *shp, int shmflg)
1017{
1018 return security_ops->shm_associate(shp, shmflg);
1019}
1020
1021int security_shm_shmctl(struct shmid_kernel *shp, int cmd)
1022{
1023 return security_ops->shm_shmctl(shp, cmd);
1024}
1025
1026int security_shm_shmat(struct shmid_kernel *shp, char __user *shmaddr, int shmflg)
1027{
1028 return security_ops->shm_shmat(shp, shmaddr, shmflg);
1029}
1030
1031int security_sem_alloc(struct sem_array *sma)
1032{
1033 return security_ops->sem_alloc_security(sma);
1034}
1035
1036void security_sem_free(struct sem_array *sma)
1037{
1038 security_ops->sem_free_security(sma);
1039}
1040
1041int security_sem_associate(struct sem_array *sma, int semflg)
1042{
1043 return security_ops->sem_associate(sma, semflg);
1044}
1045
1046int security_sem_semctl(struct sem_array *sma, int cmd)
1047{
1048 return security_ops->sem_semctl(sma, cmd);
1049}
1050
1051int security_sem_semop(struct sem_array *sma, struct sembuf *sops,
1052 unsigned nsops, int alter)
1053{
1054 return security_ops->sem_semop(sma, sops, nsops, alter);
1055}
1056
1057void security_d_instantiate(struct dentry *dentry, struct inode *inode)
1058{
1059 if (unlikely(inode && IS_PRIVATE(inode)))
1060 return;
1061 security_ops->d_instantiate(dentry, inode);
1062}
1063EXPORT_SYMBOL(security_d_instantiate);
1064
1065int security_getprocattr(struct task_struct *p, char *name, char **value)
1066{
1067 return security_ops->getprocattr(p, name, value);
1068}
1069
1070int security_setprocattr(struct task_struct *p, char *name, void *value, size_t size)
1071{
1072 return security_ops->setprocattr(p, name, value, size);
1073}
1074
1075int security_netlink_send(struct sock *sk, struct sk_buff *skb)
1076{
1077 return security_ops->netlink_send(sk, skb);
1078}
1079
1080int security_ismaclabel(const char *name)
1081{
1082 return security_ops->ismaclabel(name);
1083}
1084EXPORT_SYMBOL(security_ismaclabel);
1085
1086int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
1087{
1088 return security_ops->secid_to_secctx(secid, secdata, seclen);
1089}
1090EXPORT_SYMBOL(security_secid_to_secctx);
1091
1092int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
1093{
1094 return security_ops->secctx_to_secid(secdata, seclen, secid);
1095}
1096EXPORT_SYMBOL(security_secctx_to_secid);
1097
1098void security_release_secctx(char *secdata, u32 seclen)
1099{
1100 security_ops->release_secctx(secdata, seclen);
1101}
1102EXPORT_SYMBOL(security_release_secctx);
1103
1104int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen)
1105{
1106 return security_ops->inode_notifysecctx(inode, ctx, ctxlen);
1107}
1108EXPORT_SYMBOL(security_inode_notifysecctx);
1109
1110int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen)
1111{
1112 return security_ops->inode_setsecctx(dentry, ctx, ctxlen);
1113}
1114EXPORT_SYMBOL(security_inode_setsecctx);
1115
1116int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen)
1117{
1118 return security_ops->inode_getsecctx(inode, ctx, ctxlen);
1119}
1120EXPORT_SYMBOL(security_inode_getsecctx);
1121
1122#ifdef CONFIG_SECURITY_NETWORK
1123
1124int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk)
1125{
1126 return security_ops->unix_stream_connect(sock, other, newsk);
1127}
1128EXPORT_SYMBOL(security_unix_stream_connect);
1129
1130int security_unix_may_send(struct socket *sock, struct socket *other)
1131{
1132 return security_ops->unix_may_send(sock, other);
1133}
1134EXPORT_SYMBOL(security_unix_may_send);
1135
1136int security_socket_create(int family, int type, int protocol, int kern)
1137{
1138 return security_ops->socket_create(family, type, protocol, kern);
1139}
1140
1141int security_socket_post_create(struct socket *sock, int family,
1142 int type, int protocol, int kern)
1143{
1144 return security_ops->socket_post_create(sock, family, type,
1145 protocol, kern);
1146}
1147
1148int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen)
1149{
1150 return security_ops->socket_bind(sock, address, addrlen);
1151}
1152
1153int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen)
1154{
1155 return security_ops->socket_connect(sock, address, addrlen);
1156}
1157
1158int security_socket_listen(struct socket *sock, int backlog)
1159{
1160 return security_ops->socket_listen(sock, backlog);
1161}
1162
1163int security_socket_accept(struct socket *sock, struct socket *newsock)
1164{
1165 return security_ops->socket_accept(sock, newsock);
1166}
1167
1168int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size)
1169{
1170 return security_ops->socket_sendmsg(sock, msg, size);
1171}
1172
1173int security_socket_recvmsg(struct socket *sock, struct msghdr *msg,
1174 int size, int flags)
1175{
1176 return security_ops->socket_recvmsg(sock, msg, size, flags);
1177}
1178
1179int security_socket_getsockname(struct socket *sock)
1180{
1181 return security_ops->socket_getsockname(sock);
1182}
1183
1184int security_socket_getpeername(struct socket *sock)
1185{
1186 return security_ops->socket_getpeername(sock);
1187}
1188
1189int security_socket_getsockopt(struct socket *sock, int level, int optname)
1190{
1191 return security_ops->socket_getsockopt(sock, level, optname);
1192}
1193
1194int security_socket_setsockopt(struct socket *sock, int level, int optname)
1195{
1196 return security_ops->socket_setsockopt(sock, level, optname);
1197}
1198
1199int security_socket_shutdown(struct socket *sock, int how)
1200{
1201 return security_ops->socket_shutdown(sock, how);
1202}
1203
1204int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
1205{
1206 return security_ops->socket_sock_rcv_skb(sk, skb);
1207}
1208EXPORT_SYMBOL(security_sock_rcv_skb);
1209
1210int security_socket_getpeersec_stream(struct socket *sock, char __user *optval,
1211 int __user *optlen, unsigned len)
1212{
1213 return security_ops->socket_getpeersec_stream(sock, optval, optlen, len);
1214}
1215
1216int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
1217{
1218 return security_ops->socket_getpeersec_dgram(sock, skb, secid);
1219}
1220EXPORT_SYMBOL(security_socket_getpeersec_dgram);
1221
1222int security_sk_alloc(struct sock *sk, int family, gfp_t priority)
1223{
1224 return security_ops->sk_alloc_security(sk, family, priority);
1225}
1226
1227void security_sk_free(struct sock *sk)
1228{
1229 security_ops->sk_free_security(sk);
1230}
1231
1232void security_sk_clone(const struct sock *sk, struct sock *newsk)
1233{
1234 security_ops->sk_clone_security(sk, newsk);
1235}
1236EXPORT_SYMBOL(security_sk_clone);
1237
1238void security_sk_classify_flow(struct sock *sk, struct flowi *fl)
1239{
1240 security_ops->sk_getsecid(sk, &fl->flowi_secid);
1241}
1242EXPORT_SYMBOL(security_sk_classify_flow);
1243
1244void security_req_classify_flow(const struct request_sock *req, struct flowi *fl)
1245{
1246 security_ops->req_classify_flow(req, fl);
1247}
1248EXPORT_SYMBOL(security_req_classify_flow);
1249
1250void security_sock_graft(struct sock *sk, struct socket *parent)
1251{
1252 security_ops->sock_graft(sk, parent);
1253}
1254EXPORT_SYMBOL(security_sock_graft);
1255
1256int security_inet_conn_request(struct sock *sk,
1257 struct sk_buff *skb, struct request_sock *req)
1258{
1259 return security_ops->inet_conn_request(sk, skb, req);
1260}
1261EXPORT_SYMBOL(security_inet_conn_request);
1262
1263void security_inet_csk_clone(struct sock *newsk,
1264 const struct request_sock *req)
1265{
1266 security_ops->inet_csk_clone(newsk, req);
1267}
1268
1269void security_inet_conn_established(struct sock *sk,
1270 struct sk_buff *skb)
1271{
1272 security_ops->inet_conn_established(sk, skb);
1273}
1274
1275int security_secmark_relabel_packet(u32 secid)
1276{
1277 return security_ops->secmark_relabel_packet(secid);
1278}
1279EXPORT_SYMBOL(security_secmark_relabel_packet);
1280
1281void security_secmark_refcount_inc(void)
1282{
1283 security_ops->secmark_refcount_inc();
1284}
1285EXPORT_SYMBOL(security_secmark_refcount_inc);
1286
1287void security_secmark_refcount_dec(void)
1288{
1289 security_ops->secmark_refcount_dec();
1290}
1291EXPORT_SYMBOL(security_secmark_refcount_dec);
1292
1293int security_tun_dev_alloc_security(void **security)
1294{
1295 return security_ops->tun_dev_alloc_security(security);
1296}
1297EXPORT_SYMBOL(security_tun_dev_alloc_security);
1298
1299void security_tun_dev_free_security(void *security)
1300{
1301 security_ops->tun_dev_free_security(security);
1302}
1303EXPORT_SYMBOL(security_tun_dev_free_security);
1304
1305int security_tun_dev_create(void)
1306{
1307 return security_ops->tun_dev_create();
1308}
1309EXPORT_SYMBOL(security_tun_dev_create);
1310
1311int security_tun_dev_attach_queue(void *security)
1312{
1313 return security_ops->tun_dev_attach_queue(security);
1314}
1315EXPORT_SYMBOL(security_tun_dev_attach_queue);
1316
1317int security_tun_dev_attach(struct sock *sk, void *security)
1318{
1319 return security_ops->tun_dev_attach(sk, security);
1320}
1321EXPORT_SYMBOL(security_tun_dev_attach);
1322
1323int security_tun_dev_open(void *security)
1324{
1325 return security_ops->tun_dev_open(security);
1326}
1327EXPORT_SYMBOL(security_tun_dev_open);
1328
1329void security_skb_owned_by(struct sk_buff *skb, struct sock *sk)
1330{
1331 security_ops->skb_owned_by(skb, sk);
1332}
1333
1334#endif /* CONFIG_SECURITY_NETWORK */
1335
1336#ifdef CONFIG_SECURITY_NETWORK_XFRM
1337
1338int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp,
1339 struct xfrm_user_sec_ctx *sec_ctx,
1340 gfp_t gfp)
1341{
1342 return security_ops->xfrm_policy_alloc_security(ctxp, sec_ctx, gfp);
1343}
1344EXPORT_SYMBOL(security_xfrm_policy_alloc);
1345
1346int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
1347 struct xfrm_sec_ctx **new_ctxp)
1348{
1349 return security_ops->xfrm_policy_clone_security(old_ctx, new_ctxp);
1350}
1351
1352void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx)
1353{
1354 security_ops->xfrm_policy_free_security(ctx);
1355}
1356EXPORT_SYMBOL(security_xfrm_policy_free);
1357
1358int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx)
1359{
1360 return security_ops->xfrm_policy_delete_security(ctx);
1361}
1362
1363int security_xfrm_state_alloc(struct xfrm_state *x,
1364 struct xfrm_user_sec_ctx *sec_ctx)
1365{
1366 return security_ops->xfrm_state_alloc(x, sec_ctx);
1367}
1368EXPORT_SYMBOL(security_xfrm_state_alloc);
1369
1370int security_xfrm_state_alloc_acquire(struct xfrm_state *x,
1371 struct xfrm_sec_ctx *polsec, u32 secid)
1372{
1373 return security_ops->xfrm_state_alloc_acquire(x, polsec, secid);
1374}
1375
1376int security_xfrm_state_delete(struct xfrm_state *x)
1377{
1378 return security_ops->xfrm_state_delete_security(x);
1379}
1380EXPORT_SYMBOL(security_xfrm_state_delete);
1381
1382void security_xfrm_state_free(struct xfrm_state *x)
1383{
1384 security_ops->xfrm_state_free_security(x);
1385}
1386
1387int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir)
1388{
1389 return security_ops->xfrm_policy_lookup(ctx, fl_secid, dir);
1390}
1391
1392int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
1393 struct xfrm_policy *xp,
1394 const struct flowi *fl)
1395{
1396 return security_ops->xfrm_state_pol_flow_match(x, xp, fl);
1397}
1398
1399int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid)
1400{
1401 return security_ops->xfrm_decode_session(skb, secid, 1);
1402}
1403
1404void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl)
1405{
1406 int rc = security_ops->xfrm_decode_session(skb, &fl->flowi_secid, 0);
1407
1408 BUG_ON(rc);
1409}
1410EXPORT_SYMBOL(security_skb_classify_flow);
1411
1412#endif /* CONFIG_SECURITY_NETWORK_XFRM */
1413
1414#ifdef CONFIG_KEYS
1415
1416int security_key_alloc(struct key *key, const struct cred *cred,
1417 unsigned long flags)
1418{
1419 return security_ops->key_alloc(key, cred, flags);
1420}
1421
1422void security_key_free(struct key *key)
1423{
1424 security_ops->key_free(key);
1425}
1426
1427int security_key_permission(key_ref_t key_ref,
1428 const struct cred *cred, key_perm_t perm)
1429{
1430 return security_ops->key_permission(key_ref, cred, perm);
1431}
1432
1433int security_key_getsecurity(struct key *key, char **_buffer)
1434{
1435 return security_ops->key_getsecurity(key, _buffer);
1436}
1437
1438#endif /* CONFIG_KEYS */
1439
1440#ifdef CONFIG_AUDIT
1441
1442int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule)
1443{
1444 return security_ops->audit_rule_init(field, op, rulestr, lsmrule);
1445}
1446
1447int security_audit_rule_known(struct audit_krule *krule)
1448{
1449 return security_ops->audit_rule_known(krule);
1450}
1451
1452void security_audit_rule_free(void *lsmrule)
1453{
1454 security_ops->audit_rule_free(lsmrule);
1455}
1456
1457int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule,
1458 struct audit_context *actx)
1459{
1460 return security_ops->audit_rule_match(secid, field, op, lsmrule, actx);
1461}
1462
1463#endif /* CONFIG_AUDIT */
1/*
2 * Security plug functions
3 *
4 * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com>
5 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
6 * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com>
7 * Copyright (C) 2016 Mellanox Technologies
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 */
14
15#include <linux/bpf.h>
16#include <linux/capability.h>
17#include <linux/dcache.h>
18#include <linux/module.h>
19#include <linux/init.h>
20#include <linux/kernel.h>
21#include <linux/lsm_hooks.h>
22#include <linux/integrity.h>
23#include <linux/ima.h>
24#include <linux/evm.h>
25#include <linux/fsnotify.h>
26#include <linux/mman.h>
27#include <linux/mount.h>
28#include <linux/personality.h>
29#include <linux/backing-dev.h>
30#include <linux/string.h>
31#include <net/flow.h>
32
33#include <trace/events/initcall.h>
34
35#define MAX_LSM_EVM_XATTR 2
36
37/* Maximum number of letters for an LSM name string */
38#define SECURITY_NAME_MAX 10
39
40struct security_hook_heads security_hook_heads __lsm_ro_after_init;
41static ATOMIC_NOTIFIER_HEAD(lsm_notifier_chain);
42
43char *lsm_names;
44/* Boot-time LSM user choice */
45static __initdata char chosen_lsm[SECURITY_NAME_MAX + 1] =
46 CONFIG_DEFAULT_SECURITY;
47
48static void __init do_security_initcalls(void)
49{
50 int ret;
51 initcall_t *call;
52 call = __security_initcall_start;
53 trace_initcall_level("security");
54 while (call < __security_initcall_end) {
55 trace_initcall_start((*call));
56 ret = (*call) ();
57 trace_initcall_finish((*call), ret);
58 call++;
59 }
60}
61
62/**
63 * security_init - initializes the security framework
64 *
65 * This should be called early in the kernel initialization sequence.
66 */
67int __init security_init(void)
68{
69 int i;
70 struct hlist_head *list = (struct hlist_head *) &security_hook_heads;
71
72 for (i = 0; i < sizeof(security_hook_heads) / sizeof(struct hlist_head);
73 i++)
74 INIT_HLIST_HEAD(&list[i]);
75 pr_info("Security Framework initialized\n");
76
77 /*
78 * Load minor LSMs, with the capability module always first.
79 */
80 capability_add_hooks();
81 yama_add_hooks();
82 loadpin_add_hooks();
83
84 /*
85 * Load all the remaining security modules.
86 */
87 do_security_initcalls();
88
89 return 0;
90}
91
92/* Save user chosen LSM */
93static int __init choose_lsm(char *str)
94{
95 strncpy(chosen_lsm, str, SECURITY_NAME_MAX);
96 return 1;
97}
98__setup("security=", choose_lsm);
99
100static bool match_last_lsm(const char *list, const char *lsm)
101{
102 const char *last;
103
104 if (WARN_ON(!list || !lsm))
105 return false;
106 last = strrchr(list, ',');
107 if (last)
108 /* Pass the comma, strcmp() will check for '\0' */
109 last++;
110 else
111 last = list;
112 return !strcmp(last, lsm);
113}
114
115static int lsm_append(char *new, char **result)
116{
117 char *cp;
118
119 if (*result == NULL) {
120 *result = kstrdup(new, GFP_KERNEL);
121 } else {
122 /* Check if it is the last registered name */
123 if (match_last_lsm(*result, new))
124 return 0;
125 cp = kasprintf(GFP_KERNEL, "%s,%s", *result, new);
126 if (cp == NULL)
127 return -ENOMEM;
128 kfree(*result);
129 *result = cp;
130 }
131 return 0;
132}
133
134/**
135 * security_module_enable - Load given security module on boot ?
136 * @module: the name of the module
137 *
138 * Each LSM must pass this method before registering its own operations
139 * to avoid security registration races. This method may also be used
140 * to check if your LSM is currently loaded during kernel initialization.
141 *
142 * Returns:
143 *
144 * true if:
145 *
146 * - The passed LSM is the one chosen by user at boot time,
147 * - or the passed LSM is configured as the default and the user did not
148 * choose an alternate LSM at boot time.
149 *
150 * Otherwise, return false.
151 */
152int __init security_module_enable(const char *module)
153{
154 return !strcmp(module, chosen_lsm);
155}
156
157/**
158 * security_add_hooks - Add a modules hooks to the hook lists.
159 * @hooks: the hooks to add
160 * @count: the number of hooks to add
161 * @lsm: the name of the security module
162 *
163 * Each LSM has to register its hooks with the infrastructure.
164 */
165void __init security_add_hooks(struct security_hook_list *hooks, int count,
166 char *lsm)
167{
168 int i;
169
170 for (i = 0; i < count; i++) {
171 hooks[i].lsm = lsm;
172 hlist_add_tail_rcu(&hooks[i].list, hooks[i].head);
173 }
174 if (lsm_append(lsm, &lsm_names) < 0)
175 panic("%s - Cannot get early memory.\n", __func__);
176}
177
178int call_lsm_notifier(enum lsm_event event, void *data)
179{
180 return atomic_notifier_call_chain(&lsm_notifier_chain, event, data);
181}
182EXPORT_SYMBOL(call_lsm_notifier);
183
184int register_lsm_notifier(struct notifier_block *nb)
185{
186 return atomic_notifier_chain_register(&lsm_notifier_chain, nb);
187}
188EXPORT_SYMBOL(register_lsm_notifier);
189
190int unregister_lsm_notifier(struct notifier_block *nb)
191{
192 return atomic_notifier_chain_unregister(&lsm_notifier_chain, nb);
193}
194EXPORT_SYMBOL(unregister_lsm_notifier);
195
196/*
197 * Hook list operation macros.
198 *
199 * call_void_hook:
200 * This is a hook that does not return a value.
201 *
202 * call_int_hook:
203 * This is a hook that returns a value.
204 */
205
206#define call_void_hook(FUNC, ...) \
207 do { \
208 struct security_hook_list *P; \
209 \
210 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) \
211 P->hook.FUNC(__VA_ARGS__); \
212 } while (0)
213
214#define call_int_hook(FUNC, IRC, ...) ({ \
215 int RC = IRC; \
216 do { \
217 struct security_hook_list *P; \
218 \
219 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) { \
220 RC = P->hook.FUNC(__VA_ARGS__); \
221 if (RC != 0) \
222 break; \
223 } \
224 } while (0); \
225 RC; \
226})
227
228/* Security operations */
229
230int security_binder_set_context_mgr(struct task_struct *mgr)
231{
232 return call_int_hook(binder_set_context_mgr, 0, mgr);
233}
234
235int security_binder_transaction(struct task_struct *from,
236 struct task_struct *to)
237{
238 return call_int_hook(binder_transaction, 0, from, to);
239}
240
241int security_binder_transfer_binder(struct task_struct *from,
242 struct task_struct *to)
243{
244 return call_int_hook(binder_transfer_binder, 0, from, to);
245}
246
247int security_binder_transfer_file(struct task_struct *from,
248 struct task_struct *to, struct file *file)
249{
250 return call_int_hook(binder_transfer_file, 0, from, to, file);
251}
252
253int security_ptrace_access_check(struct task_struct *child, unsigned int mode)
254{
255 return call_int_hook(ptrace_access_check, 0, child, mode);
256}
257
258int security_ptrace_traceme(struct task_struct *parent)
259{
260 return call_int_hook(ptrace_traceme, 0, parent);
261}
262
263int security_capget(struct task_struct *target,
264 kernel_cap_t *effective,
265 kernel_cap_t *inheritable,
266 kernel_cap_t *permitted)
267{
268 return call_int_hook(capget, 0, target,
269 effective, inheritable, permitted);
270}
271
272int security_capset(struct cred *new, const struct cred *old,
273 const kernel_cap_t *effective,
274 const kernel_cap_t *inheritable,
275 const kernel_cap_t *permitted)
276{
277 return call_int_hook(capset, 0, new, old,
278 effective, inheritable, permitted);
279}
280
281int security_capable(const struct cred *cred, struct user_namespace *ns,
282 int cap)
283{
284 return call_int_hook(capable, 0, cred, ns, cap, SECURITY_CAP_AUDIT);
285}
286
287int security_capable_noaudit(const struct cred *cred, struct user_namespace *ns,
288 int cap)
289{
290 return call_int_hook(capable, 0, cred, ns, cap, SECURITY_CAP_NOAUDIT);
291}
292
293int security_quotactl(int cmds, int type, int id, struct super_block *sb)
294{
295 return call_int_hook(quotactl, 0, cmds, type, id, sb);
296}
297
298int security_quota_on(struct dentry *dentry)
299{
300 return call_int_hook(quota_on, 0, dentry);
301}
302
303int security_syslog(int type)
304{
305 return call_int_hook(syslog, 0, type);
306}
307
308int security_settime64(const struct timespec64 *ts, const struct timezone *tz)
309{
310 return call_int_hook(settime, 0, ts, tz);
311}
312
313int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
314{
315 struct security_hook_list *hp;
316 int cap_sys_admin = 1;
317 int rc;
318
319 /*
320 * The module will respond with a positive value if
321 * it thinks the __vm_enough_memory() call should be
322 * made with the cap_sys_admin set. If all of the modules
323 * agree that it should be set it will. If any module
324 * thinks it should not be set it won't.
325 */
326 hlist_for_each_entry(hp, &security_hook_heads.vm_enough_memory, list) {
327 rc = hp->hook.vm_enough_memory(mm, pages);
328 if (rc <= 0) {
329 cap_sys_admin = 0;
330 break;
331 }
332 }
333 return __vm_enough_memory(mm, pages, cap_sys_admin);
334}
335
336int security_bprm_set_creds(struct linux_binprm *bprm)
337{
338 return call_int_hook(bprm_set_creds, 0, bprm);
339}
340
341int security_bprm_check(struct linux_binprm *bprm)
342{
343 int ret;
344
345 ret = call_int_hook(bprm_check_security, 0, bprm);
346 if (ret)
347 return ret;
348 return ima_bprm_check(bprm);
349}
350
351void security_bprm_committing_creds(struct linux_binprm *bprm)
352{
353 call_void_hook(bprm_committing_creds, bprm);
354}
355
356void security_bprm_committed_creds(struct linux_binprm *bprm)
357{
358 call_void_hook(bprm_committed_creds, bprm);
359}
360
361int security_sb_alloc(struct super_block *sb)
362{
363 return call_int_hook(sb_alloc_security, 0, sb);
364}
365
366void security_sb_free(struct super_block *sb)
367{
368 call_void_hook(sb_free_security, sb);
369}
370
371int security_sb_copy_data(char *orig, char *copy)
372{
373 return call_int_hook(sb_copy_data, 0, orig, copy);
374}
375EXPORT_SYMBOL(security_sb_copy_data);
376
377int security_sb_remount(struct super_block *sb, void *data)
378{
379 return call_int_hook(sb_remount, 0, sb, data);
380}
381
382int security_sb_kern_mount(struct super_block *sb, int flags, void *data)
383{
384 return call_int_hook(sb_kern_mount, 0, sb, flags, data);
385}
386
387int security_sb_show_options(struct seq_file *m, struct super_block *sb)
388{
389 return call_int_hook(sb_show_options, 0, m, sb);
390}
391
392int security_sb_statfs(struct dentry *dentry)
393{
394 return call_int_hook(sb_statfs, 0, dentry);
395}
396
397int security_sb_mount(const char *dev_name, const struct path *path,
398 const char *type, unsigned long flags, void *data)
399{
400 return call_int_hook(sb_mount, 0, dev_name, path, type, flags, data);
401}
402
403int security_sb_umount(struct vfsmount *mnt, int flags)
404{
405 return call_int_hook(sb_umount, 0, mnt, flags);
406}
407
408int security_sb_pivotroot(const struct path *old_path, const struct path *new_path)
409{
410 return call_int_hook(sb_pivotroot, 0, old_path, new_path);
411}
412
413int security_sb_set_mnt_opts(struct super_block *sb,
414 struct security_mnt_opts *opts,
415 unsigned long kern_flags,
416 unsigned long *set_kern_flags)
417{
418 return call_int_hook(sb_set_mnt_opts,
419 opts->num_mnt_opts ? -EOPNOTSUPP : 0, sb,
420 opts, kern_flags, set_kern_flags);
421}
422EXPORT_SYMBOL(security_sb_set_mnt_opts);
423
424int security_sb_clone_mnt_opts(const struct super_block *oldsb,
425 struct super_block *newsb,
426 unsigned long kern_flags,
427 unsigned long *set_kern_flags)
428{
429 return call_int_hook(sb_clone_mnt_opts, 0, oldsb, newsb,
430 kern_flags, set_kern_flags);
431}
432EXPORT_SYMBOL(security_sb_clone_mnt_opts);
433
434int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts)
435{
436 return call_int_hook(sb_parse_opts_str, 0, options, opts);
437}
438EXPORT_SYMBOL(security_sb_parse_opts_str);
439
440int security_inode_alloc(struct inode *inode)
441{
442 inode->i_security = NULL;
443 return call_int_hook(inode_alloc_security, 0, inode);
444}
445
446void security_inode_free(struct inode *inode)
447{
448 integrity_inode_free(inode);
449 call_void_hook(inode_free_security, inode);
450}
451
452int security_dentry_init_security(struct dentry *dentry, int mode,
453 const struct qstr *name, void **ctx,
454 u32 *ctxlen)
455{
456 return call_int_hook(dentry_init_security, -EOPNOTSUPP, dentry, mode,
457 name, ctx, ctxlen);
458}
459EXPORT_SYMBOL(security_dentry_init_security);
460
461int security_dentry_create_files_as(struct dentry *dentry, int mode,
462 struct qstr *name,
463 const struct cred *old, struct cred *new)
464{
465 return call_int_hook(dentry_create_files_as, 0, dentry, mode,
466 name, old, new);
467}
468EXPORT_SYMBOL(security_dentry_create_files_as);
469
470int security_inode_init_security(struct inode *inode, struct inode *dir,
471 const struct qstr *qstr,
472 const initxattrs initxattrs, void *fs_data)
473{
474 struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1];
475 struct xattr *lsm_xattr, *evm_xattr, *xattr;
476 int ret;
477
478 if (unlikely(IS_PRIVATE(inode)))
479 return 0;
480
481 if (!initxattrs)
482 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode,
483 dir, qstr, NULL, NULL, NULL);
484 memset(new_xattrs, 0, sizeof(new_xattrs));
485 lsm_xattr = new_xattrs;
486 ret = call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, qstr,
487 &lsm_xattr->name,
488 &lsm_xattr->value,
489 &lsm_xattr->value_len);
490 if (ret)
491 goto out;
492
493 evm_xattr = lsm_xattr + 1;
494 ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr);
495 if (ret)
496 goto out;
497 ret = initxattrs(inode, new_xattrs, fs_data);
498out:
499 for (xattr = new_xattrs; xattr->value != NULL; xattr++)
500 kfree(xattr->value);
501 return (ret == -EOPNOTSUPP) ? 0 : ret;
502}
503EXPORT_SYMBOL(security_inode_init_security);
504
505int security_old_inode_init_security(struct inode *inode, struct inode *dir,
506 const struct qstr *qstr, const char **name,
507 void **value, size_t *len)
508{
509 if (unlikely(IS_PRIVATE(inode)))
510 return -EOPNOTSUPP;
511 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir,
512 qstr, name, value, len);
513}
514EXPORT_SYMBOL(security_old_inode_init_security);
515
516#ifdef CONFIG_SECURITY_PATH
517int security_path_mknod(const struct path *dir, struct dentry *dentry, umode_t mode,
518 unsigned int dev)
519{
520 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
521 return 0;
522 return call_int_hook(path_mknod, 0, dir, dentry, mode, dev);
523}
524EXPORT_SYMBOL(security_path_mknod);
525
526int security_path_mkdir(const struct path *dir, struct dentry *dentry, umode_t mode)
527{
528 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
529 return 0;
530 return call_int_hook(path_mkdir, 0, dir, dentry, mode);
531}
532EXPORT_SYMBOL(security_path_mkdir);
533
534int security_path_rmdir(const struct path *dir, struct dentry *dentry)
535{
536 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
537 return 0;
538 return call_int_hook(path_rmdir, 0, dir, dentry);
539}
540
541int security_path_unlink(const struct path *dir, struct dentry *dentry)
542{
543 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
544 return 0;
545 return call_int_hook(path_unlink, 0, dir, dentry);
546}
547EXPORT_SYMBOL(security_path_unlink);
548
549int security_path_symlink(const struct path *dir, struct dentry *dentry,
550 const char *old_name)
551{
552 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
553 return 0;
554 return call_int_hook(path_symlink, 0, dir, dentry, old_name);
555}
556
557int security_path_link(struct dentry *old_dentry, const struct path *new_dir,
558 struct dentry *new_dentry)
559{
560 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
561 return 0;
562 return call_int_hook(path_link, 0, old_dentry, new_dir, new_dentry);
563}
564
565int security_path_rename(const struct path *old_dir, struct dentry *old_dentry,
566 const struct path *new_dir, struct dentry *new_dentry,
567 unsigned int flags)
568{
569 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
570 (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
571 return 0;
572
573 if (flags & RENAME_EXCHANGE) {
574 int err = call_int_hook(path_rename, 0, new_dir, new_dentry,
575 old_dir, old_dentry);
576 if (err)
577 return err;
578 }
579
580 return call_int_hook(path_rename, 0, old_dir, old_dentry, new_dir,
581 new_dentry);
582}
583EXPORT_SYMBOL(security_path_rename);
584
585int security_path_truncate(const struct path *path)
586{
587 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
588 return 0;
589 return call_int_hook(path_truncate, 0, path);
590}
591
592int security_path_chmod(const struct path *path, umode_t mode)
593{
594 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
595 return 0;
596 return call_int_hook(path_chmod, 0, path, mode);
597}
598
599int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
600{
601 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
602 return 0;
603 return call_int_hook(path_chown, 0, path, uid, gid);
604}
605
606int security_path_chroot(const struct path *path)
607{
608 return call_int_hook(path_chroot, 0, path);
609}
610#endif
611
612int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode)
613{
614 if (unlikely(IS_PRIVATE(dir)))
615 return 0;
616 return call_int_hook(inode_create, 0, dir, dentry, mode);
617}
618EXPORT_SYMBOL_GPL(security_inode_create);
619
620int security_inode_link(struct dentry *old_dentry, struct inode *dir,
621 struct dentry *new_dentry)
622{
623 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
624 return 0;
625 return call_int_hook(inode_link, 0, old_dentry, dir, new_dentry);
626}
627
628int security_inode_unlink(struct inode *dir, struct dentry *dentry)
629{
630 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
631 return 0;
632 return call_int_hook(inode_unlink, 0, dir, dentry);
633}
634
635int security_inode_symlink(struct inode *dir, struct dentry *dentry,
636 const char *old_name)
637{
638 if (unlikely(IS_PRIVATE(dir)))
639 return 0;
640 return call_int_hook(inode_symlink, 0, dir, dentry, old_name);
641}
642
643int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
644{
645 if (unlikely(IS_PRIVATE(dir)))
646 return 0;
647 return call_int_hook(inode_mkdir, 0, dir, dentry, mode);
648}
649EXPORT_SYMBOL_GPL(security_inode_mkdir);
650
651int security_inode_rmdir(struct inode *dir, struct dentry *dentry)
652{
653 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
654 return 0;
655 return call_int_hook(inode_rmdir, 0, dir, dentry);
656}
657
658int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev)
659{
660 if (unlikely(IS_PRIVATE(dir)))
661 return 0;
662 return call_int_hook(inode_mknod, 0, dir, dentry, mode, dev);
663}
664
665int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry,
666 struct inode *new_dir, struct dentry *new_dentry,
667 unsigned int flags)
668{
669 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
670 (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
671 return 0;
672
673 if (flags & RENAME_EXCHANGE) {
674 int err = call_int_hook(inode_rename, 0, new_dir, new_dentry,
675 old_dir, old_dentry);
676 if (err)
677 return err;
678 }
679
680 return call_int_hook(inode_rename, 0, old_dir, old_dentry,
681 new_dir, new_dentry);
682}
683
684int security_inode_readlink(struct dentry *dentry)
685{
686 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
687 return 0;
688 return call_int_hook(inode_readlink, 0, dentry);
689}
690
691int security_inode_follow_link(struct dentry *dentry, struct inode *inode,
692 bool rcu)
693{
694 if (unlikely(IS_PRIVATE(inode)))
695 return 0;
696 return call_int_hook(inode_follow_link, 0, dentry, inode, rcu);
697}
698
699int security_inode_permission(struct inode *inode, int mask)
700{
701 if (unlikely(IS_PRIVATE(inode)))
702 return 0;
703 return call_int_hook(inode_permission, 0, inode, mask);
704}
705
706int security_inode_setattr(struct dentry *dentry, struct iattr *attr)
707{
708 int ret;
709
710 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
711 return 0;
712 ret = call_int_hook(inode_setattr, 0, dentry, attr);
713 if (ret)
714 return ret;
715 return evm_inode_setattr(dentry, attr);
716}
717EXPORT_SYMBOL_GPL(security_inode_setattr);
718
719int security_inode_getattr(const struct path *path)
720{
721 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
722 return 0;
723 return call_int_hook(inode_getattr, 0, path);
724}
725
726int security_inode_setxattr(struct dentry *dentry, const char *name,
727 const void *value, size_t size, int flags)
728{
729 int ret;
730
731 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
732 return 0;
733 /*
734 * SELinux and Smack integrate the cap call,
735 * so assume that all LSMs supplying this call do so.
736 */
737 ret = call_int_hook(inode_setxattr, 1, dentry, name, value, size,
738 flags);
739
740 if (ret == 1)
741 ret = cap_inode_setxattr(dentry, name, value, size, flags);
742 if (ret)
743 return ret;
744 ret = ima_inode_setxattr(dentry, name, value, size);
745 if (ret)
746 return ret;
747 return evm_inode_setxattr(dentry, name, value, size);
748}
749
750void security_inode_post_setxattr(struct dentry *dentry, const char *name,
751 const void *value, size_t size, int flags)
752{
753 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
754 return;
755 call_void_hook(inode_post_setxattr, dentry, name, value, size, flags);
756 evm_inode_post_setxattr(dentry, name, value, size);
757}
758
759int security_inode_getxattr(struct dentry *dentry, const char *name)
760{
761 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
762 return 0;
763 return call_int_hook(inode_getxattr, 0, dentry, name);
764}
765
766int security_inode_listxattr(struct dentry *dentry)
767{
768 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
769 return 0;
770 return call_int_hook(inode_listxattr, 0, dentry);
771}
772
773int security_inode_removexattr(struct dentry *dentry, const char *name)
774{
775 int ret;
776
777 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
778 return 0;
779 /*
780 * SELinux and Smack integrate the cap call,
781 * so assume that all LSMs supplying this call do so.
782 */
783 ret = call_int_hook(inode_removexattr, 1, dentry, name);
784 if (ret == 1)
785 ret = cap_inode_removexattr(dentry, name);
786 if (ret)
787 return ret;
788 ret = ima_inode_removexattr(dentry, name);
789 if (ret)
790 return ret;
791 return evm_inode_removexattr(dentry, name);
792}
793
794int security_inode_need_killpriv(struct dentry *dentry)
795{
796 return call_int_hook(inode_need_killpriv, 0, dentry);
797}
798
799int security_inode_killpriv(struct dentry *dentry)
800{
801 return call_int_hook(inode_killpriv, 0, dentry);
802}
803
804int security_inode_getsecurity(struct inode *inode, const char *name, void **buffer, bool alloc)
805{
806 struct security_hook_list *hp;
807 int rc;
808
809 if (unlikely(IS_PRIVATE(inode)))
810 return -EOPNOTSUPP;
811 /*
812 * Only one module will provide an attribute with a given name.
813 */
814 hlist_for_each_entry(hp, &security_hook_heads.inode_getsecurity, list) {
815 rc = hp->hook.inode_getsecurity(inode, name, buffer, alloc);
816 if (rc != -EOPNOTSUPP)
817 return rc;
818 }
819 return -EOPNOTSUPP;
820}
821
822int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
823{
824 struct security_hook_list *hp;
825 int rc;
826
827 if (unlikely(IS_PRIVATE(inode)))
828 return -EOPNOTSUPP;
829 /*
830 * Only one module will provide an attribute with a given name.
831 */
832 hlist_for_each_entry(hp, &security_hook_heads.inode_setsecurity, list) {
833 rc = hp->hook.inode_setsecurity(inode, name, value, size,
834 flags);
835 if (rc != -EOPNOTSUPP)
836 return rc;
837 }
838 return -EOPNOTSUPP;
839}
840
841int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
842{
843 if (unlikely(IS_PRIVATE(inode)))
844 return 0;
845 return call_int_hook(inode_listsecurity, 0, inode, buffer, buffer_size);
846}
847EXPORT_SYMBOL(security_inode_listsecurity);
848
849void security_inode_getsecid(struct inode *inode, u32 *secid)
850{
851 call_void_hook(inode_getsecid, inode, secid);
852}
853
854int security_inode_copy_up(struct dentry *src, struct cred **new)
855{
856 return call_int_hook(inode_copy_up, 0, src, new);
857}
858EXPORT_SYMBOL(security_inode_copy_up);
859
860int security_inode_copy_up_xattr(const char *name)
861{
862 return call_int_hook(inode_copy_up_xattr, -EOPNOTSUPP, name);
863}
864EXPORT_SYMBOL(security_inode_copy_up_xattr);
865
866int security_file_permission(struct file *file, int mask)
867{
868 int ret;
869
870 ret = call_int_hook(file_permission, 0, file, mask);
871 if (ret)
872 return ret;
873
874 return fsnotify_perm(file, mask);
875}
876
877int security_file_alloc(struct file *file)
878{
879 return call_int_hook(file_alloc_security, 0, file);
880}
881
882void security_file_free(struct file *file)
883{
884 call_void_hook(file_free_security, file);
885}
886
887int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
888{
889 return call_int_hook(file_ioctl, 0, file, cmd, arg);
890}
891
892static inline unsigned long mmap_prot(struct file *file, unsigned long prot)
893{
894 /*
895 * Does we have PROT_READ and does the application expect
896 * it to imply PROT_EXEC? If not, nothing to talk about...
897 */
898 if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ)
899 return prot;
900 if (!(current->personality & READ_IMPLIES_EXEC))
901 return prot;
902 /*
903 * if that's an anonymous mapping, let it.
904 */
905 if (!file)
906 return prot | PROT_EXEC;
907 /*
908 * ditto if it's not on noexec mount, except that on !MMU we need
909 * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case
910 */
911 if (!path_noexec(&file->f_path)) {
912#ifndef CONFIG_MMU
913 if (file->f_op->mmap_capabilities) {
914 unsigned caps = file->f_op->mmap_capabilities(file);
915 if (!(caps & NOMMU_MAP_EXEC))
916 return prot;
917 }
918#endif
919 return prot | PROT_EXEC;
920 }
921 /* anything on noexec mount won't get PROT_EXEC */
922 return prot;
923}
924
925int security_mmap_file(struct file *file, unsigned long prot,
926 unsigned long flags)
927{
928 int ret;
929 ret = call_int_hook(mmap_file, 0, file, prot,
930 mmap_prot(file, prot), flags);
931 if (ret)
932 return ret;
933 return ima_file_mmap(file, prot);
934}
935
936int security_mmap_addr(unsigned long addr)
937{
938 return call_int_hook(mmap_addr, 0, addr);
939}
940
941int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot,
942 unsigned long prot)
943{
944 return call_int_hook(file_mprotect, 0, vma, reqprot, prot);
945}
946
947int security_file_lock(struct file *file, unsigned int cmd)
948{
949 return call_int_hook(file_lock, 0, file, cmd);
950}
951
952int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
953{
954 return call_int_hook(file_fcntl, 0, file, cmd, arg);
955}
956
957void security_file_set_fowner(struct file *file)
958{
959 call_void_hook(file_set_fowner, file);
960}
961
962int security_file_send_sigiotask(struct task_struct *tsk,
963 struct fown_struct *fown, int sig)
964{
965 return call_int_hook(file_send_sigiotask, 0, tsk, fown, sig);
966}
967
968int security_file_receive(struct file *file)
969{
970 return call_int_hook(file_receive, 0, file);
971}
972
973int security_file_open(struct file *file, const struct cred *cred)
974{
975 int ret;
976
977 ret = call_int_hook(file_open, 0, file, cred);
978 if (ret)
979 return ret;
980
981 return fsnotify_perm(file, MAY_OPEN);
982}
983
984int security_task_alloc(struct task_struct *task, unsigned long clone_flags)
985{
986 return call_int_hook(task_alloc, 0, task, clone_flags);
987}
988
989void security_task_free(struct task_struct *task)
990{
991 call_void_hook(task_free, task);
992}
993
994int security_cred_alloc_blank(struct cred *cred, gfp_t gfp)
995{
996 return call_int_hook(cred_alloc_blank, 0, cred, gfp);
997}
998
999void security_cred_free(struct cred *cred)
1000{
1001 call_void_hook(cred_free, cred);
1002}
1003
1004int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp)
1005{
1006 return call_int_hook(cred_prepare, 0, new, old, gfp);
1007}
1008
1009void security_transfer_creds(struct cred *new, const struct cred *old)
1010{
1011 call_void_hook(cred_transfer, new, old);
1012}
1013
1014void security_cred_getsecid(const struct cred *c, u32 *secid)
1015{
1016 *secid = 0;
1017 call_void_hook(cred_getsecid, c, secid);
1018}
1019EXPORT_SYMBOL(security_cred_getsecid);
1020
1021int security_kernel_act_as(struct cred *new, u32 secid)
1022{
1023 return call_int_hook(kernel_act_as, 0, new, secid);
1024}
1025
1026int security_kernel_create_files_as(struct cred *new, struct inode *inode)
1027{
1028 return call_int_hook(kernel_create_files_as, 0, new, inode);
1029}
1030
1031int security_kernel_module_request(char *kmod_name)
1032{
1033 return call_int_hook(kernel_module_request, 0, kmod_name);
1034}
1035
1036int security_kernel_read_file(struct file *file, enum kernel_read_file_id id)
1037{
1038 int ret;
1039
1040 ret = call_int_hook(kernel_read_file, 0, file, id);
1041 if (ret)
1042 return ret;
1043 return ima_read_file(file, id);
1044}
1045EXPORT_SYMBOL_GPL(security_kernel_read_file);
1046
1047int security_kernel_post_read_file(struct file *file, char *buf, loff_t size,
1048 enum kernel_read_file_id id)
1049{
1050 int ret;
1051
1052 ret = call_int_hook(kernel_post_read_file, 0, file, buf, size, id);
1053 if (ret)
1054 return ret;
1055 return ima_post_read_file(file, buf, size, id);
1056}
1057EXPORT_SYMBOL_GPL(security_kernel_post_read_file);
1058
1059int security_task_fix_setuid(struct cred *new, const struct cred *old,
1060 int flags)
1061{
1062 return call_int_hook(task_fix_setuid, 0, new, old, flags);
1063}
1064
1065int security_task_setpgid(struct task_struct *p, pid_t pgid)
1066{
1067 return call_int_hook(task_setpgid, 0, p, pgid);
1068}
1069
1070int security_task_getpgid(struct task_struct *p)
1071{
1072 return call_int_hook(task_getpgid, 0, p);
1073}
1074
1075int security_task_getsid(struct task_struct *p)
1076{
1077 return call_int_hook(task_getsid, 0, p);
1078}
1079
1080void security_task_getsecid(struct task_struct *p, u32 *secid)
1081{
1082 *secid = 0;
1083 call_void_hook(task_getsecid, p, secid);
1084}
1085EXPORT_SYMBOL(security_task_getsecid);
1086
1087int security_task_setnice(struct task_struct *p, int nice)
1088{
1089 return call_int_hook(task_setnice, 0, p, nice);
1090}
1091
1092int security_task_setioprio(struct task_struct *p, int ioprio)
1093{
1094 return call_int_hook(task_setioprio, 0, p, ioprio);
1095}
1096
1097int security_task_getioprio(struct task_struct *p)
1098{
1099 return call_int_hook(task_getioprio, 0, p);
1100}
1101
1102int security_task_prlimit(const struct cred *cred, const struct cred *tcred,
1103 unsigned int flags)
1104{
1105 return call_int_hook(task_prlimit, 0, cred, tcred, flags);
1106}
1107
1108int security_task_setrlimit(struct task_struct *p, unsigned int resource,
1109 struct rlimit *new_rlim)
1110{
1111 return call_int_hook(task_setrlimit, 0, p, resource, new_rlim);
1112}
1113
1114int security_task_setscheduler(struct task_struct *p)
1115{
1116 return call_int_hook(task_setscheduler, 0, p);
1117}
1118
1119int security_task_getscheduler(struct task_struct *p)
1120{
1121 return call_int_hook(task_getscheduler, 0, p);
1122}
1123
1124int security_task_movememory(struct task_struct *p)
1125{
1126 return call_int_hook(task_movememory, 0, p);
1127}
1128
1129int security_task_kill(struct task_struct *p, struct siginfo *info,
1130 int sig, const struct cred *cred)
1131{
1132 return call_int_hook(task_kill, 0, p, info, sig, cred);
1133}
1134
1135int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
1136 unsigned long arg4, unsigned long arg5)
1137{
1138 int thisrc;
1139 int rc = -ENOSYS;
1140 struct security_hook_list *hp;
1141
1142 hlist_for_each_entry(hp, &security_hook_heads.task_prctl, list) {
1143 thisrc = hp->hook.task_prctl(option, arg2, arg3, arg4, arg5);
1144 if (thisrc != -ENOSYS) {
1145 rc = thisrc;
1146 if (thisrc != 0)
1147 break;
1148 }
1149 }
1150 return rc;
1151}
1152
1153void security_task_to_inode(struct task_struct *p, struct inode *inode)
1154{
1155 call_void_hook(task_to_inode, p, inode);
1156}
1157
1158int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
1159{
1160 return call_int_hook(ipc_permission, 0, ipcp, flag);
1161}
1162
1163void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
1164{
1165 *secid = 0;
1166 call_void_hook(ipc_getsecid, ipcp, secid);
1167}
1168
1169int security_msg_msg_alloc(struct msg_msg *msg)
1170{
1171 return call_int_hook(msg_msg_alloc_security, 0, msg);
1172}
1173
1174void security_msg_msg_free(struct msg_msg *msg)
1175{
1176 call_void_hook(msg_msg_free_security, msg);
1177}
1178
1179int security_msg_queue_alloc(struct kern_ipc_perm *msq)
1180{
1181 return call_int_hook(msg_queue_alloc_security, 0, msq);
1182}
1183
1184void security_msg_queue_free(struct kern_ipc_perm *msq)
1185{
1186 call_void_hook(msg_queue_free_security, msq);
1187}
1188
1189int security_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg)
1190{
1191 return call_int_hook(msg_queue_associate, 0, msq, msqflg);
1192}
1193
1194int security_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd)
1195{
1196 return call_int_hook(msg_queue_msgctl, 0, msq, cmd);
1197}
1198
1199int security_msg_queue_msgsnd(struct kern_ipc_perm *msq,
1200 struct msg_msg *msg, int msqflg)
1201{
1202 return call_int_hook(msg_queue_msgsnd, 0, msq, msg, msqflg);
1203}
1204
1205int security_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg,
1206 struct task_struct *target, long type, int mode)
1207{
1208 return call_int_hook(msg_queue_msgrcv, 0, msq, msg, target, type, mode);
1209}
1210
1211int security_shm_alloc(struct kern_ipc_perm *shp)
1212{
1213 return call_int_hook(shm_alloc_security, 0, shp);
1214}
1215
1216void security_shm_free(struct kern_ipc_perm *shp)
1217{
1218 call_void_hook(shm_free_security, shp);
1219}
1220
1221int security_shm_associate(struct kern_ipc_perm *shp, int shmflg)
1222{
1223 return call_int_hook(shm_associate, 0, shp, shmflg);
1224}
1225
1226int security_shm_shmctl(struct kern_ipc_perm *shp, int cmd)
1227{
1228 return call_int_hook(shm_shmctl, 0, shp, cmd);
1229}
1230
1231int security_shm_shmat(struct kern_ipc_perm *shp, char __user *shmaddr, int shmflg)
1232{
1233 return call_int_hook(shm_shmat, 0, shp, shmaddr, shmflg);
1234}
1235
1236int security_sem_alloc(struct kern_ipc_perm *sma)
1237{
1238 return call_int_hook(sem_alloc_security, 0, sma);
1239}
1240
1241void security_sem_free(struct kern_ipc_perm *sma)
1242{
1243 call_void_hook(sem_free_security, sma);
1244}
1245
1246int security_sem_associate(struct kern_ipc_perm *sma, int semflg)
1247{
1248 return call_int_hook(sem_associate, 0, sma, semflg);
1249}
1250
1251int security_sem_semctl(struct kern_ipc_perm *sma, int cmd)
1252{
1253 return call_int_hook(sem_semctl, 0, sma, cmd);
1254}
1255
1256int security_sem_semop(struct kern_ipc_perm *sma, struct sembuf *sops,
1257 unsigned nsops, int alter)
1258{
1259 return call_int_hook(sem_semop, 0, sma, sops, nsops, alter);
1260}
1261
1262void security_d_instantiate(struct dentry *dentry, struct inode *inode)
1263{
1264 if (unlikely(inode && IS_PRIVATE(inode)))
1265 return;
1266 call_void_hook(d_instantiate, dentry, inode);
1267}
1268EXPORT_SYMBOL(security_d_instantiate);
1269
1270int security_getprocattr(struct task_struct *p, char *name, char **value)
1271{
1272 return call_int_hook(getprocattr, -EINVAL, p, name, value);
1273}
1274
1275int security_setprocattr(const char *name, void *value, size_t size)
1276{
1277 return call_int_hook(setprocattr, -EINVAL, name, value, size);
1278}
1279
1280int security_netlink_send(struct sock *sk, struct sk_buff *skb)
1281{
1282 return call_int_hook(netlink_send, 0, sk, skb);
1283}
1284
1285int security_ismaclabel(const char *name)
1286{
1287 return call_int_hook(ismaclabel, 0, name);
1288}
1289EXPORT_SYMBOL(security_ismaclabel);
1290
1291int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
1292{
1293 return call_int_hook(secid_to_secctx, -EOPNOTSUPP, secid, secdata,
1294 seclen);
1295}
1296EXPORT_SYMBOL(security_secid_to_secctx);
1297
1298int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
1299{
1300 *secid = 0;
1301 return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid);
1302}
1303EXPORT_SYMBOL(security_secctx_to_secid);
1304
1305void security_release_secctx(char *secdata, u32 seclen)
1306{
1307 call_void_hook(release_secctx, secdata, seclen);
1308}
1309EXPORT_SYMBOL(security_release_secctx);
1310
1311void security_inode_invalidate_secctx(struct inode *inode)
1312{
1313 call_void_hook(inode_invalidate_secctx, inode);
1314}
1315EXPORT_SYMBOL(security_inode_invalidate_secctx);
1316
1317int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen)
1318{
1319 return call_int_hook(inode_notifysecctx, 0, inode, ctx, ctxlen);
1320}
1321EXPORT_SYMBOL(security_inode_notifysecctx);
1322
1323int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen)
1324{
1325 return call_int_hook(inode_setsecctx, 0, dentry, ctx, ctxlen);
1326}
1327EXPORT_SYMBOL(security_inode_setsecctx);
1328
1329int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen)
1330{
1331 return call_int_hook(inode_getsecctx, -EOPNOTSUPP, inode, ctx, ctxlen);
1332}
1333EXPORT_SYMBOL(security_inode_getsecctx);
1334
1335#ifdef CONFIG_SECURITY_NETWORK
1336
1337int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk)
1338{
1339 return call_int_hook(unix_stream_connect, 0, sock, other, newsk);
1340}
1341EXPORT_SYMBOL(security_unix_stream_connect);
1342
1343int security_unix_may_send(struct socket *sock, struct socket *other)
1344{
1345 return call_int_hook(unix_may_send, 0, sock, other);
1346}
1347EXPORT_SYMBOL(security_unix_may_send);
1348
1349int security_socket_create(int family, int type, int protocol, int kern)
1350{
1351 return call_int_hook(socket_create, 0, family, type, protocol, kern);
1352}
1353
1354int security_socket_post_create(struct socket *sock, int family,
1355 int type, int protocol, int kern)
1356{
1357 return call_int_hook(socket_post_create, 0, sock, family, type,
1358 protocol, kern);
1359}
1360
1361int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen)
1362{
1363 return call_int_hook(socket_bind, 0, sock, address, addrlen);
1364}
1365
1366int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen)
1367{
1368 return call_int_hook(socket_connect, 0, sock, address, addrlen);
1369}
1370
1371int security_socket_listen(struct socket *sock, int backlog)
1372{
1373 return call_int_hook(socket_listen, 0, sock, backlog);
1374}
1375
1376int security_socket_accept(struct socket *sock, struct socket *newsock)
1377{
1378 return call_int_hook(socket_accept, 0, sock, newsock);
1379}
1380
1381int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size)
1382{
1383 return call_int_hook(socket_sendmsg, 0, sock, msg, size);
1384}
1385
1386int security_socket_recvmsg(struct socket *sock, struct msghdr *msg,
1387 int size, int flags)
1388{
1389 return call_int_hook(socket_recvmsg, 0, sock, msg, size, flags);
1390}
1391
1392int security_socket_getsockname(struct socket *sock)
1393{
1394 return call_int_hook(socket_getsockname, 0, sock);
1395}
1396
1397int security_socket_getpeername(struct socket *sock)
1398{
1399 return call_int_hook(socket_getpeername, 0, sock);
1400}
1401
1402int security_socket_getsockopt(struct socket *sock, int level, int optname)
1403{
1404 return call_int_hook(socket_getsockopt, 0, sock, level, optname);
1405}
1406
1407int security_socket_setsockopt(struct socket *sock, int level, int optname)
1408{
1409 return call_int_hook(socket_setsockopt, 0, sock, level, optname);
1410}
1411
1412int security_socket_shutdown(struct socket *sock, int how)
1413{
1414 return call_int_hook(socket_shutdown, 0, sock, how);
1415}
1416
1417int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
1418{
1419 return call_int_hook(socket_sock_rcv_skb, 0, sk, skb);
1420}
1421EXPORT_SYMBOL(security_sock_rcv_skb);
1422
1423int security_socket_getpeersec_stream(struct socket *sock, char __user *optval,
1424 int __user *optlen, unsigned len)
1425{
1426 return call_int_hook(socket_getpeersec_stream, -ENOPROTOOPT, sock,
1427 optval, optlen, len);
1428}
1429
1430int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
1431{
1432 return call_int_hook(socket_getpeersec_dgram, -ENOPROTOOPT, sock,
1433 skb, secid);
1434}
1435EXPORT_SYMBOL(security_socket_getpeersec_dgram);
1436
1437int security_sk_alloc(struct sock *sk, int family, gfp_t priority)
1438{
1439 return call_int_hook(sk_alloc_security, 0, sk, family, priority);
1440}
1441
1442void security_sk_free(struct sock *sk)
1443{
1444 call_void_hook(sk_free_security, sk);
1445}
1446
1447void security_sk_clone(const struct sock *sk, struct sock *newsk)
1448{
1449 call_void_hook(sk_clone_security, sk, newsk);
1450}
1451EXPORT_SYMBOL(security_sk_clone);
1452
1453void security_sk_classify_flow(struct sock *sk, struct flowi *fl)
1454{
1455 call_void_hook(sk_getsecid, sk, &fl->flowi_secid);
1456}
1457EXPORT_SYMBOL(security_sk_classify_flow);
1458
1459void security_req_classify_flow(const struct request_sock *req, struct flowi *fl)
1460{
1461 call_void_hook(req_classify_flow, req, fl);
1462}
1463EXPORT_SYMBOL(security_req_classify_flow);
1464
1465void security_sock_graft(struct sock *sk, struct socket *parent)
1466{
1467 call_void_hook(sock_graft, sk, parent);
1468}
1469EXPORT_SYMBOL(security_sock_graft);
1470
1471int security_inet_conn_request(struct sock *sk,
1472 struct sk_buff *skb, struct request_sock *req)
1473{
1474 return call_int_hook(inet_conn_request, 0, sk, skb, req);
1475}
1476EXPORT_SYMBOL(security_inet_conn_request);
1477
1478void security_inet_csk_clone(struct sock *newsk,
1479 const struct request_sock *req)
1480{
1481 call_void_hook(inet_csk_clone, newsk, req);
1482}
1483
1484void security_inet_conn_established(struct sock *sk,
1485 struct sk_buff *skb)
1486{
1487 call_void_hook(inet_conn_established, sk, skb);
1488}
1489EXPORT_SYMBOL(security_inet_conn_established);
1490
1491int security_secmark_relabel_packet(u32 secid)
1492{
1493 return call_int_hook(secmark_relabel_packet, 0, secid);
1494}
1495EXPORT_SYMBOL(security_secmark_relabel_packet);
1496
1497void security_secmark_refcount_inc(void)
1498{
1499 call_void_hook(secmark_refcount_inc);
1500}
1501EXPORT_SYMBOL(security_secmark_refcount_inc);
1502
1503void security_secmark_refcount_dec(void)
1504{
1505 call_void_hook(secmark_refcount_dec);
1506}
1507EXPORT_SYMBOL(security_secmark_refcount_dec);
1508
1509int security_tun_dev_alloc_security(void **security)
1510{
1511 return call_int_hook(tun_dev_alloc_security, 0, security);
1512}
1513EXPORT_SYMBOL(security_tun_dev_alloc_security);
1514
1515void security_tun_dev_free_security(void *security)
1516{
1517 call_void_hook(tun_dev_free_security, security);
1518}
1519EXPORT_SYMBOL(security_tun_dev_free_security);
1520
1521int security_tun_dev_create(void)
1522{
1523 return call_int_hook(tun_dev_create, 0);
1524}
1525EXPORT_SYMBOL(security_tun_dev_create);
1526
1527int security_tun_dev_attach_queue(void *security)
1528{
1529 return call_int_hook(tun_dev_attach_queue, 0, security);
1530}
1531EXPORT_SYMBOL(security_tun_dev_attach_queue);
1532
1533int security_tun_dev_attach(struct sock *sk, void *security)
1534{
1535 return call_int_hook(tun_dev_attach, 0, sk, security);
1536}
1537EXPORT_SYMBOL(security_tun_dev_attach);
1538
1539int security_tun_dev_open(void *security)
1540{
1541 return call_int_hook(tun_dev_open, 0, security);
1542}
1543EXPORT_SYMBOL(security_tun_dev_open);
1544
1545int security_sctp_assoc_request(struct sctp_endpoint *ep, struct sk_buff *skb)
1546{
1547 return call_int_hook(sctp_assoc_request, 0, ep, skb);
1548}
1549EXPORT_SYMBOL(security_sctp_assoc_request);
1550
1551int security_sctp_bind_connect(struct sock *sk, int optname,
1552 struct sockaddr *address, int addrlen)
1553{
1554 return call_int_hook(sctp_bind_connect, 0, sk, optname,
1555 address, addrlen);
1556}
1557EXPORT_SYMBOL(security_sctp_bind_connect);
1558
1559void security_sctp_sk_clone(struct sctp_endpoint *ep, struct sock *sk,
1560 struct sock *newsk)
1561{
1562 call_void_hook(sctp_sk_clone, ep, sk, newsk);
1563}
1564EXPORT_SYMBOL(security_sctp_sk_clone);
1565
1566#endif /* CONFIG_SECURITY_NETWORK */
1567
1568#ifdef CONFIG_SECURITY_INFINIBAND
1569
1570int security_ib_pkey_access(void *sec, u64 subnet_prefix, u16 pkey)
1571{
1572 return call_int_hook(ib_pkey_access, 0, sec, subnet_prefix, pkey);
1573}
1574EXPORT_SYMBOL(security_ib_pkey_access);
1575
1576int security_ib_endport_manage_subnet(void *sec, const char *dev_name, u8 port_num)
1577{
1578 return call_int_hook(ib_endport_manage_subnet, 0, sec, dev_name, port_num);
1579}
1580EXPORT_SYMBOL(security_ib_endport_manage_subnet);
1581
1582int security_ib_alloc_security(void **sec)
1583{
1584 return call_int_hook(ib_alloc_security, 0, sec);
1585}
1586EXPORT_SYMBOL(security_ib_alloc_security);
1587
1588void security_ib_free_security(void *sec)
1589{
1590 call_void_hook(ib_free_security, sec);
1591}
1592EXPORT_SYMBOL(security_ib_free_security);
1593#endif /* CONFIG_SECURITY_INFINIBAND */
1594
1595#ifdef CONFIG_SECURITY_NETWORK_XFRM
1596
1597int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp,
1598 struct xfrm_user_sec_ctx *sec_ctx,
1599 gfp_t gfp)
1600{
1601 return call_int_hook(xfrm_policy_alloc_security, 0, ctxp, sec_ctx, gfp);
1602}
1603EXPORT_SYMBOL(security_xfrm_policy_alloc);
1604
1605int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
1606 struct xfrm_sec_ctx **new_ctxp)
1607{
1608 return call_int_hook(xfrm_policy_clone_security, 0, old_ctx, new_ctxp);
1609}
1610
1611void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx)
1612{
1613 call_void_hook(xfrm_policy_free_security, ctx);
1614}
1615EXPORT_SYMBOL(security_xfrm_policy_free);
1616
1617int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx)
1618{
1619 return call_int_hook(xfrm_policy_delete_security, 0, ctx);
1620}
1621
1622int security_xfrm_state_alloc(struct xfrm_state *x,
1623 struct xfrm_user_sec_ctx *sec_ctx)
1624{
1625 return call_int_hook(xfrm_state_alloc, 0, x, sec_ctx);
1626}
1627EXPORT_SYMBOL(security_xfrm_state_alloc);
1628
1629int security_xfrm_state_alloc_acquire(struct xfrm_state *x,
1630 struct xfrm_sec_ctx *polsec, u32 secid)
1631{
1632 return call_int_hook(xfrm_state_alloc_acquire, 0, x, polsec, secid);
1633}
1634
1635int security_xfrm_state_delete(struct xfrm_state *x)
1636{
1637 return call_int_hook(xfrm_state_delete_security, 0, x);
1638}
1639EXPORT_SYMBOL(security_xfrm_state_delete);
1640
1641void security_xfrm_state_free(struct xfrm_state *x)
1642{
1643 call_void_hook(xfrm_state_free_security, x);
1644}
1645
1646int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir)
1647{
1648 return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid, dir);
1649}
1650
1651int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
1652 struct xfrm_policy *xp,
1653 const struct flowi *fl)
1654{
1655 struct security_hook_list *hp;
1656 int rc = 1;
1657
1658 /*
1659 * Since this function is expected to return 0 or 1, the judgment
1660 * becomes difficult if multiple LSMs supply this call. Fortunately,
1661 * we can use the first LSM's judgment because currently only SELinux
1662 * supplies this call.
1663 *
1664 * For speed optimization, we explicitly break the loop rather than
1665 * using the macro
1666 */
1667 hlist_for_each_entry(hp, &security_hook_heads.xfrm_state_pol_flow_match,
1668 list) {
1669 rc = hp->hook.xfrm_state_pol_flow_match(x, xp, fl);
1670 break;
1671 }
1672 return rc;
1673}
1674
1675int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid)
1676{
1677 return call_int_hook(xfrm_decode_session, 0, skb, secid, 1);
1678}
1679
1680void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl)
1681{
1682 int rc = call_int_hook(xfrm_decode_session, 0, skb, &fl->flowi_secid,
1683 0);
1684
1685 BUG_ON(rc);
1686}
1687EXPORT_SYMBOL(security_skb_classify_flow);
1688
1689#endif /* CONFIG_SECURITY_NETWORK_XFRM */
1690
1691#ifdef CONFIG_KEYS
1692
1693int security_key_alloc(struct key *key, const struct cred *cred,
1694 unsigned long flags)
1695{
1696 return call_int_hook(key_alloc, 0, key, cred, flags);
1697}
1698
1699void security_key_free(struct key *key)
1700{
1701 call_void_hook(key_free, key);
1702}
1703
1704int security_key_permission(key_ref_t key_ref,
1705 const struct cred *cred, unsigned perm)
1706{
1707 return call_int_hook(key_permission, 0, key_ref, cred, perm);
1708}
1709
1710int security_key_getsecurity(struct key *key, char **_buffer)
1711{
1712 *_buffer = NULL;
1713 return call_int_hook(key_getsecurity, 0, key, _buffer);
1714}
1715
1716#endif /* CONFIG_KEYS */
1717
1718#ifdef CONFIG_AUDIT
1719
1720int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule)
1721{
1722 return call_int_hook(audit_rule_init, 0, field, op, rulestr, lsmrule);
1723}
1724
1725int security_audit_rule_known(struct audit_krule *krule)
1726{
1727 return call_int_hook(audit_rule_known, 0, krule);
1728}
1729
1730void security_audit_rule_free(void *lsmrule)
1731{
1732 call_void_hook(audit_rule_free, lsmrule);
1733}
1734
1735int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule,
1736 struct audit_context *actx)
1737{
1738 return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule,
1739 actx);
1740}
1741#endif /* CONFIG_AUDIT */
1742
1743#ifdef CONFIG_BPF_SYSCALL
1744int security_bpf(int cmd, union bpf_attr *attr, unsigned int size)
1745{
1746 return call_int_hook(bpf, 0, cmd, attr, size);
1747}
1748int security_bpf_map(struct bpf_map *map, fmode_t fmode)
1749{
1750 return call_int_hook(bpf_map, 0, map, fmode);
1751}
1752int security_bpf_prog(struct bpf_prog *prog)
1753{
1754 return call_int_hook(bpf_prog, 0, prog);
1755}
1756int security_bpf_map_alloc(struct bpf_map *map)
1757{
1758 return call_int_hook(bpf_map_alloc_security, 0, map);
1759}
1760int security_bpf_prog_alloc(struct bpf_prog_aux *aux)
1761{
1762 return call_int_hook(bpf_prog_alloc_security, 0, aux);
1763}
1764void security_bpf_map_free(struct bpf_map *map)
1765{
1766 call_void_hook(bpf_map_free_security, map);
1767}
1768void security_bpf_prog_free(struct bpf_prog_aux *aux)
1769{
1770 call_void_hook(bpf_prog_free_security, aux);
1771}
1772#endif /* CONFIG_BPF_SYSCALL */