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1/*
2 * 32 bit compatibility code for System V IPC
3 *
4 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
5 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
6 * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com>
7 * Copyright (C) 2000 VA Linux Co
8 * Copyright (C) 2000 Don Dugger <n0ano@valinux.com>
9 * Copyright (C) 2000 Hewlett-Packard Co.
10 * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com>
11 * Copyright (C) 2000 Gerhard Tonn (ton@de.ibm.com)
12 * Copyright (C) 2000-2002 Andi Kleen, SuSE Labs (x86-64 port)
13 * Copyright (C) 2000 Silicon Graphics, Inc.
14 * Copyright (C) 2001 IBM
15 * Copyright (C) 2004 IBM Deutschland Entwicklung GmbH, IBM Corporation
16 * Copyright (C) 2004 Arnd Bergmann (arnd@arndb.de)
17 *
18 * This code is collected from the versions for sparc64, mips64, s390x, ia64,
19 * ppc64 and x86_64, all of which are based on the original sparc64 version
20 * by Jakub Jelinek.
21 *
22 */
23#include <linux/compat.h>
24#include <linux/errno.h>
25#include <linux/highuid.h>
26#include <linux/init.h>
27#include <linux/msg.h>
28#include <linux/shm.h>
29#include <linux/syscalls.h>
30#include <linux/ptrace.h>
31
32#include <linux/mutex.h>
33#include <asm/uaccess.h>
34
35#include "util.h"
36
37struct compat_msgbuf {
38 compat_long_t mtype;
39 char mtext[1];
40};
41
42struct compat_ipc_perm {
43 key_t key;
44 __compat_uid_t uid;
45 __compat_gid_t gid;
46 __compat_uid_t cuid;
47 __compat_gid_t cgid;
48 compat_mode_t mode;
49 unsigned short seq;
50};
51
52struct compat_semid_ds {
53 struct compat_ipc_perm sem_perm;
54 compat_time_t sem_otime;
55 compat_time_t sem_ctime;
56 compat_uptr_t sem_base;
57 compat_uptr_t sem_pending;
58 compat_uptr_t sem_pending_last;
59 compat_uptr_t undo;
60 unsigned short sem_nsems;
61};
62
63struct compat_msqid_ds {
64 struct compat_ipc_perm msg_perm;
65 compat_uptr_t msg_first;
66 compat_uptr_t msg_last;
67 compat_time_t msg_stime;
68 compat_time_t msg_rtime;
69 compat_time_t msg_ctime;
70 compat_ulong_t msg_lcbytes;
71 compat_ulong_t msg_lqbytes;
72 unsigned short msg_cbytes;
73 unsigned short msg_qnum;
74 unsigned short msg_qbytes;
75 compat_ipc_pid_t msg_lspid;
76 compat_ipc_pid_t msg_lrpid;
77};
78
79struct compat_shmid_ds {
80 struct compat_ipc_perm shm_perm;
81 int shm_segsz;
82 compat_time_t shm_atime;
83 compat_time_t shm_dtime;
84 compat_time_t shm_ctime;
85 compat_ipc_pid_t shm_cpid;
86 compat_ipc_pid_t shm_lpid;
87 unsigned short shm_nattch;
88 unsigned short shm_unused;
89 compat_uptr_t shm_unused2;
90 compat_uptr_t shm_unused3;
91};
92
93struct compat_ipc_kludge {
94 compat_uptr_t msgp;
95 compat_long_t msgtyp;
96};
97
98struct compat_shminfo64 {
99 compat_ulong_t shmmax;
100 compat_ulong_t shmmin;
101 compat_ulong_t shmmni;
102 compat_ulong_t shmseg;
103 compat_ulong_t shmall;
104 compat_ulong_t __unused1;
105 compat_ulong_t __unused2;
106 compat_ulong_t __unused3;
107 compat_ulong_t __unused4;
108};
109
110struct compat_shm_info {
111 compat_int_t used_ids;
112 compat_ulong_t shm_tot, shm_rss, shm_swp;
113 compat_ulong_t swap_attempts, swap_successes;
114};
115
116extern int sem_ctls[];
117#define sc_semopm (sem_ctls[2])
118
119static inline int compat_ipc_parse_version(int *cmd)
120{
121#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
122 int version = *cmd & IPC_64;
123
124 /* this is tricky: architectures that have support for the old
125 * ipc structures in 64 bit binaries need to have IPC_64 set
126 * in cmd, the others need to have it cleared */
127#ifndef ipc_parse_version
128 *cmd |= IPC_64;
129#else
130 *cmd &= ~IPC_64;
131#endif
132 return version;
133#else
134 /* With the asm-generic APIs, we always use the 64-bit versions. */
135 return IPC_64;
136#endif
137}
138
139static inline int __get_compat_ipc64_perm(struct ipc64_perm *p64,
140 struct compat_ipc64_perm __user *up64)
141{
142 int err;
143
144 err = __get_user(p64->uid, &up64->uid);
145 err |= __get_user(p64->gid, &up64->gid);
146 err |= __get_user(p64->mode, &up64->mode);
147 return err;
148}
149
150static inline int __get_compat_ipc_perm(struct ipc64_perm *p,
151 struct compat_ipc_perm __user *up)
152{
153 int err;
154
155 err = __get_user(p->uid, &up->uid);
156 err |= __get_user(p->gid, &up->gid);
157 err |= __get_user(p->mode, &up->mode);
158 return err;
159}
160
161static inline int __put_compat_ipc64_perm(struct ipc64_perm *p64,
162 struct compat_ipc64_perm __user *up64)
163{
164 int err;
165
166 err = __put_user(p64->key, &up64->key);
167 err |= __put_user(p64->uid, &up64->uid);
168 err |= __put_user(p64->gid, &up64->gid);
169 err |= __put_user(p64->cuid, &up64->cuid);
170 err |= __put_user(p64->cgid, &up64->cgid);
171 err |= __put_user(p64->mode, &up64->mode);
172 err |= __put_user(p64->seq, &up64->seq);
173 return err;
174}
175
176static inline int __put_compat_ipc_perm(struct ipc64_perm *p,
177 struct compat_ipc_perm __user *up)
178{
179 int err;
180 __compat_uid_t u;
181 __compat_gid_t g;
182
183 err = __put_user(p->key, &up->key);
184 SET_UID(u, p->uid);
185 err |= __put_user(u, &up->uid);
186 SET_GID(g, p->gid);
187 err |= __put_user(g, &up->gid);
188 SET_UID(u, p->cuid);
189 err |= __put_user(u, &up->cuid);
190 SET_GID(g, p->cgid);
191 err |= __put_user(g, &up->cgid);
192 err |= __put_user(p->mode, &up->mode);
193 err |= __put_user(p->seq, &up->seq);
194 return err;
195}
196
197static inline int get_compat_semid64_ds(struct semid64_ds *s64,
198 struct compat_semid64_ds __user *up64)
199{
200 if (!access_ok (VERIFY_READ, up64, sizeof(*up64)))
201 return -EFAULT;
202 return __get_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm);
203}
204
205static inline int get_compat_semid_ds(struct semid64_ds *s,
206 struct compat_semid_ds __user *up)
207{
208 if (!access_ok (VERIFY_READ, up, sizeof(*up)))
209 return -EFAULT;
210 return __get_compat_ipc_perm(&s->sem_perm, &up->sem_perm);
211}
212
213static inline int put_compat_semid64_ds(struct semid64_ds *s64,
214 struct compat_semid64_ds __user *up64)
215{
216 int err;
217
218 if (!access_ok (VERIFY_WRITE, up64, sizeof(*up64)))
219 return -EFAULT;
220 err = __put_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm);
221 err |= __put_user(s64->sem_otime, &up64->sem_otime);
222 err |= __put_user(s64->sem_ctime, &up64->sem_ctime);
223 err |= __put_user(s64->sem_nsems, &up64->sem_nsems);
224 return err;
225}
226
227static inline int put_compat_semid_ds(struct semid64_ds *s,
228 struct compat_semid_ds __user *up)
229{
230 int err;
231
232 if (!access_ok (VERIFY_WRITE, up, sizeof(*up)))
233 return -EFAULT;
234 err = __put_compat_ipc_perm(&s->sem_perm, &up->sem_perm);
235 err |= __put_user(s->sem_otime, &up->sem_otime);
236 err |= __put_user(s->sem_ctime, &up->sem_ctime);
237 err |= __put_user(s->sem_nsems, &up->sem_nsems);
238 return err;
239}
240
241static long do_compat_semctl(int first, int second, int third, u32 pad)
242{
243 union semun fourth;
244 int err, err2;
245 struct semid64_ds s64;
246 struct semid64_ds __user *up64;
247 int version = compat_ipc_parse_version(&third);
248
249 memset(&s64, 0, sizeof(s64));
250
251 if ((third & (~IPC_64)) == SETVAL)
252 fourth.val = (int) pad;
253 else
254 fourth.__pad = compat_ptr(pad);
255 switch (third & (~IPC_64)) {
256 case IPC_INFO:
257 case IPC_RMID:
258 case SEM_INFO:
259 case GETVAL:
260 case GETPID:
261 case GETNCNT:
262 case GETZCNT:
263 case GETALL:
264 case SETVAL:
265 case SETALL:
266 err = sys_semctl(first, second, third, fourth);
267 break;
268
269 case IPC_STAT:
270 case SEM_STAT:
271 up64 = compat_alloc_user_space(sizeof(s64));
272 fourth.__pad = up64;
273 err = sys_semctl(first, second, third, fourth);
274 if (err < 0)
275 break;
276 if (copy_from_user(&s64, up64, sizeof(s64)))
277 err2 = -EFAULT;
278 else if (version == IPC_64)
279 err2 = put_compat_semid64_ds(&s64, compat_ptr(pad));
280 else
281 err2 = put_compat_semid_ds(&s64, compat_ptr(pad));
282 if (err2)
283 err = -EFAULT;
284 break;
285
286 case IPC_SET:
287 if (version == IPC_64) {
288 err = get_compat_semid64_ds(&s64, compat_ptr(pad));
289 } else {
290 err = get_compat_semid_ds(&s64, compat_ptr(pad));
291 }
292 up64 = compat_alloc_user_space(sizeof(s64));
293 if (copy_to_user(up64, &s64, sizeof(s64)))
294 err = -EFAULT;
295 if (err)
296 break;
297
298 fourth.__pad = up64;
299 err = sys_semctl(first, second, third, fourth);
300 break;
301
302 default:
303 err = -EINVAL;
304 break;
305 }
306 return err;
307}
308
309#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
310long compat_sys_semctl(int first, int second, int third, void __user *uptr)
311{
312 u32 pad;
313
314 if (!uptr)
315 return -EINVAL;
316 if (get_user(pad, (u32 __user *) uptr))
317 return -EFAULT;
318 return do_compat_semctl(first, second, third, pad);
319}
320
321long compat_sys_msgsnd(int first, int second, int third, void __user *uptr)
322{
323 struct compat_msgbuf __user *up = uptr;
324 long type;
325
326 if (first < 0)
327 return -EINVAL;
328 if (second < 0)
329 return -EINVAL;
330
331 if (get_user(type, &up->mtype))
332 return -EFAULT;
333
334 return do_msgsnd(first, type, up->mtext, second, third);
335}
336
337long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
338 int version, void __user *uptr)
339{
340 struct compat_msgbuf __user *up;
341 long type;
342 int err;
343
344 if (first < 0)
345 return -EINVAL;
346 if (second < 0)
347 return -EINVAL;
348
349 if (!version) {
350 struct compat_ipc_kludge ipck;
351 err = -EINVAL;
352 if (!uptr)
353 goto out;
354 err = -EFAULT;
355 if (copy_from_user (&ipck, uptr, sizeof(ipck)))
356 goto out;
357 uptr = compat_ptr(ipck.msgp);
358 msgtyp = ipck.msgtyp;
359 }
360 up = uptr;
361 err = do_msgrcv(first, &type, up->mtext, second, msgtyp, third);
362 if (err < 0)
363 goto out;
364 if (put_user(type, &up->mtype))
365 err = -EFAULT;
366out:
367 return err;
368}
369#else
370long compat_sys_semctl(int semid, int semnum, int cmd, int arg)
371{
372 return do_compat_semctl(semid, semnum, cmd, arg);
373}
374
375long compat_sys_msgsnd(int msqid, struct compat_msgbuf __user *msgp,
376 size_t msgsz, int msgflg)
377{
378 compat_long_t mtype;
379
380 if (get_user(mtype, &msgp->mtype))
381 return -EFAULT;
382 return do_msgsnd(msqid, mtype, msgp->mtext, msgsz, msgflg);
383}
384
385long compat_sys_msgrcv(int msqid, struct compat_msgbuf __user *msgp,
386 size_t msgsz, long msgtyp, int msgflg)
387{
388 long err, mtype;
389
390 err = do_msgrcv(msqid, &mtype, msgp->mtext, msgsz, msgtyp, msgflg);
391 if (err < 0)
392 goto out;
393
394 if (put_user(mtype, &msgp->mtype))
395 err = -EFAULT;
396 out:
397 return err;
398}
399#endif
400
401static inline int get_compat_msqid64(struct msqid64_ds *m64,
402 struct compat_msqid64_ds __user *up64)
403{
404 int err;
405
406 if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
407 return -EFAULT;
408 err = __get_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
409 err |= __get_user(m64->msg_qbytes, &up64->msg_qbytes);
410 return err;
411}
412
413static inline int get_compat_msqid(struct msqid64_ds *m,
414 struct compat_msqid_ds __user *up)
415{
416 int err;
417
418 if (!access_ok(VERIFY_READ, up, sizeof(*up)))
419 return -EFAULT;
420 err = __get_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
421 err |= __get_user(m->msg_qbytes, &up->msg_qbytes);
422 return err;
423}
424
425static inline int put_compat_msqid64_ds(struct msqid64_ds *m64,
426 struct compat_msqid64_ds __user *up64)
427{
428 int err;
429
430 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
431 return -EFAULT;
432 err = __put_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
433 err |= __put_user(m64->msg_stime, &up64->msg_stime);
434 err |= __put_user(m64->msg_rtime, &up64->msg_rtime);
435 err |= __put_user(m64->msg_ctime, &up64->msg_ctime);
436 err |= __put_user(m64->msg_cbytes, &up64->msg_cbytes);
437 err |= __put_user(m64->msg_qnum, &up64->msg_qnum);
438 err |= __put_user(m64->msg_qbytes, &up64->msg_qbytes);
439 err |= __put_user(m64->msg_lspid, &up64->msg_lspid);
440 err |= __put_user(m64->msg_lrpid, &up64->msg_lrpid);
441 return err;
442}
443
444static inline int put_compat_msqid_ds(struct msqid64_ds *m,
445 struct compat_msqid_ds __user *up)
446{
447 int err;
448
449 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
450 return -EFAULT;
451 err = __put_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
452 err |= __put_user(m->msg_stime, &up->msg_stime);
453 err |= __put_user(m->msg_rtime, &up->msg_rtime);
454 err |= __put_user(m->msg_ctime, &up->msg_ctime);
455 err |= __put_user(m->msg_cbytes, &up->msg_cbytes);
456 err |= __put_user(m->msg_qnum, &up->msg_qnum);
457 err |= __put_user(m->msg_qbytes, &up->msg_qbytes);
458 err |= __put_user(m->msg_lspid, &up->msg_lspid);
459 err |= __put_user(m->msg_lrpid, &up->msg_lrpid);
460 return err;
461}
462
463long compat_sys_msgctl(int first, int second, void __user *uptr)
464{
465 int err, err2;
466 struct msqid64_ds m64;
467 int version = compat_ipc_parse_version(&second);
468 void __user *p;
469
470 memset(&m64, 0, sizeof(m64));
471
472 switch (second & (~IPC_64)) {
473 case IPC_INFO:
474 case IPC_RMID:
475 case MSG_INFO:
476 err = sys_msgctl(first, second, uptr);
477 break;
478
479 case IPC_SET:
480 if (version == IPC_64) {
481 err = get_compat_msqid64(&m64, uptr);
482 } else {
483 err = get_compat_msqid(&m64, uptr);
484 }
485 if (err)
486 break;
487 p = compat_alloc_user_space(sizeof(m64));
488 if (copy_to_user(p, &m64, sizeof(m64)))
489 err = -EFAULT;
490 else
491 err = sys_msgctl(first, second, p);
492 break;
493
494 case IPC_STAT:
495 case MSG_STAT:
496 p = compat_alloc_user_space(sizeof(m64));
497 err = sys_msgctl(first, second, p);
498 if (err < 0)
499 break;
500 if (copy_from_user(&m64, p, sizeof(m64)))
501 err2 = -EFAULT;
502 else if (version == IPC_64)
503 err2 = put_compat_msqid64_ds(&m64, uptr);
504 else
505 err2 = put_compat_msqid_ds(&m64, uptr);
506 if (err2)
507 err = -EFAULT;
508 break;
509
510 default:
511 err = -EINVAL;
512 break;
513 }
514 return err;
515}
516
517#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
518long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
519 void __user *uptr)
520{
521 int err;
522 unsigned long raddr;
523 compat_ulong_t __user *uaddr;
524
525 if (version == 1)
526 return -EINVAL;
527 err = do_shmat(first, uptr, second, &raddr);
528 if (err < 0)
529 return err;
530 uaddr = compat_ptr(third);
531 return put_user(raddr, uaddr);
532}
533#else
534long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg)
535{
536 unsigned long ret;
537 long err;
538
539 err = do_shmat(shmid, compat_ptr(shmaddr), shmflg, &ret);
540 if (err)
541 return err;
542 force_successful_syscall_return();
543 return (long)ret;
544}
545#endif
546
547static inline int get_compat_shmid64_ds(struct shmid64_ds *s64,
548 struct compat_shmid64_ds __user *up64)
549{
550 if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
551 return -EFAULT;
552 return __get_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
553}
554
555static inline int get_compat_shmid_ds(struct shmid64_ds *s,
556 struct compat_shmid_ds __user *up)
557{
558 if (!access_ok(VERIFY_READ, up, sizeof(*up)))
559 return -EFAULT;
560 return __get_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
561}
562
563static inline int put_compat_shmid64_ds(struct shmid64_ds *s64,
564 struct compat_shmid64_ds __user *up64)
565{
566 int err;
567
568 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
569 return -EFAULT;
570 err = __put_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
571 err |= __put_user(s64->shm_atime, &up64->shm_atime);
572 err |= __put_user(s64->shm_dtime, &up64->shm_dtime);
573 err |= __put_user(s64->shm_ctime, &up64->shm_ctime);
574 err |= __put_user(s64->shm_segsz, &up64->shm_segsz);
575 err |= __put_user(s64->shm_nattch, &up64->shm_nattch);
576 err |= __put_user(s64->shm_cpid, &up64->shm_cpid);
577 err |= __put_user(s64->shm_lpid, &up64->shm_lpid);
578 return err;
579}
580
581static inline int put_compat_shmid_ds(struct shmid64_ds *s,
582 struct compat_shmid_ds __user *up)
583{
584 int err;
585
586 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
587 return -EFAULT;
588 err = __put_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
589 err |= __put_user(s->shm_atime, &up->shm_atime);
590 err |= __put_user(s->shm_dtime, &up->shm_dtime);
591 err |= __put_user(s->shm_ctime, &up->shm_ctime);
592 err |= __put_user(s->shm_segsz, &up->shm_segsz);
593 err |= __put_user(s->shm_nattch, &up->shm_nattch);
594 err |= __put_user(s->shm_cpid, &up->shm_cpid);
595 err |= __put_user(s->shm_lpid, &up->shm_lpid);
596 return err;
597}
598
599static inline int put_compat_shminfo64(struct shminfo64 *smi,
600 struct compat_shminfo64 __user *up64)
601{
602 int err;
603
604 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
605 return -EFAULT;
606 if (smi->shmmax > INT_MAX)
607 smi->shmmax = INT_MAX;
608 err = __put_user(smi->shmmax, &up64->shmmax);
609 err |= __put_user(smi->shmmin, &up64->shmmin);
610 err |= __put_user(smi->shmmni, &up64->shmmni);
611 err |= __put_user(smi->shmseg, &up64->shmseg);
612 err |= __put_user(smi->shmall, &up64->shmall);
613 return err;
614}
615
616static inline int put_compat_shminfo(struct shminfo64 *smi,
617 struct shminfo __user *up)
618{
619 int err;
620
621 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
622 return -EFAULT;
623 if (smi->shmmax > INT_MAX)
624 smi->shmmax = INT_MAX;
625 err = __put_user(smi->shmmax, &up->shmmax);
626 err |= __put_user(smi->shmmin, &up->shmmin);
627 err |= __put_user(smi->shmmni, &up->shmmni);
628 err |= __put_user(smi->shmseg, &up->shmseg);
629 err |= __put_user(smi->shmall, &up->shmall);
630 return err;
631}
632
633static inline int put_compat_shm_info(struct shm_info __user *ip,
634 struct compat_shm_info __user *uip)
635{
636 int err;
637 struct shm_info si;
638
639 if (!access_ok(VERIFY_WRITE, uip, sizeof(*uip)) ||
640 copy_from_user(&si, ip, sizeof(si)))
641 return -EFAULT;
642 err = __put_user(si.used_ids, &uip->used_ids);
643 err |= __put_user(si.shm_tot, &uip->shm_tot);
644 err |= __put_user(si.shm_rss, &uip->shm_rss);
645 err |= __put_user(si.shm_swp, &uip->shm_swp);
646 err |= __put_user(si.swap_attempts, &uip->swap_attempts);
647 err |= __put_user(si.swap_successes, &uip->swap_successes);
648 return err;
649}
650
651long compat_sys_shmctl(int first, int second, void __user *uptr)
652{
653 void __user *p;
654 struct shmid64_ds s64;
655 struct shminfo64 smi;
656 int err, err2;
657 int version = compat_ipc_parse_version(&second);
658
659 memset(&s64, 0, sizeof(s64));
660
661 switch (second & (~IPC_64)) {
662 case IPC_RMID:
663 case SHM_LOCK:
664 case SHM_UNLOCK:
665 err = sys_shmctl(first, second, uptr);
666 break;
667
668 case IPC_INFO:
669 p = compat_alloc_user_space(sizeof(smi));
670 err = sys_shmctl(first, second, p);
671 if (err < 0)
672 break;
673 if (copy_from_user(&smi, p, sizeof(smi)))
674 err2 = -EFAULT;
675 else if (version == IPC_64)
676 err2 = put_compat_shminfo64(&smi, uptr);
677 else
678 err2 = put_compat_shminfo(&smi, uptr);
679 if (err2)
680 err = -EFAULT;
681 break;
682
683
684 case IPC_SET:
685 if (version == IPC_64) {
686 err = get_compat_shmid64_ds(&s64, uptr);
687 } else {
688 err = get_compat_shmid_ds(&s64, uptr);
689 }
690 if (err)
691 break;
692 p = compat_alloc_user_space(sizeof(s64));
693 if (copy_to_user(p, &s64, sizeof(s64)))
694 err = -EFAULT;
695 else
696 err = sys_shmctl(first, second, p);
697 break;
698
699 case IPC_STAT:
700 case SHM_STAT:
701 p = compat_alloc_user_space(sizeof(s64));
702 err = sys_shmctl(first, second, p);
703 if (err < 0)
704 break;
705 if (copy_from_user(&s64, p, sizeof(s64)))
706 err2 = -EFAULT;
707 else if (version == IPC_64)
708 err2 = put_compat_shmid64_ds(&s64, uptr);
709 else
710 err2 = put_compat_shmid_ds(&s64, uptr);
711 if (err2)
712 err = -EFAULT;
713 break;
714
715 case SHM_INFO:
716 p = compat_alloc_user_space(sizeof(struct shm_info));
717 err = sys_shmctl(first, second, p);
718 if (err < 0)
719 break;
720 err2 = put_compat_shm_info(p, uptr);
721 if (err2)
722 err = -EFAULT;
723 break;
724
725 default:
726 err = -EINVAL;
727 break;
728 }
729 return err;
730}
731
732long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
733 unsigned nsops, const struct compat_timespec __user *timeout)
734{
735 struct timespec __user *ts64 = NULL;
736 if (timeout) {
737 struct timespec ts;
738 ts64 = compat_alloc_user_space(sizeof(*ts64));
739 if (get_compat_timespec(&ts, timeout))
740 return -EFAULT;
741 if (copy_to_user(ts64, &ts, sizeof(ts)))
742 return -EFAULT;
743 }
744 return sys_semtimedop(semid, tsems, nsops, ts64);
745}
1/*
2 * 32 bit compatibility code for System V IPC
3 *
4 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
5 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
6 * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com>
7 * Copyright (C) 2000 VA Linux Co
8 * Copyright (C) 2000 Don Dugger <n0ano@valinux.com>
9 * Copyright (C) 2000 Hewlett-Packard Co.
10 * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com>
11 * Copyright (C) 2000 Gerhard Tonn (ton@de.ibm.com)
12 * Copyright (C) 2000-2002 Andi Kleen, SuSE Labs (x86-64 port)
13 * Copyright (C) 2000 Silicon Graphics, Inc.
14 * Copyright (C) 2001 IBM
15 * Copyright (C) 2004 IBM Deutschland Entwicklung GmbH, IBM Corporation
16 * Copyright (C) 2004 Arnd Bergmann (arnd@arndb.de)
17 *
18 * This code is collected from the versions for sparc64, mips64, s390x, ia64,
19 * ppc64 and x86_64, all of which are based on the original sparc64 version
20 * by Jakub Jelinek.
21 *
22 */
23#include <linux/compat.h>
24#include <linux/errno.h>
25#include <linux/highuid.h>
26#include <linux/init.h>
27#include <linux/msg.h>
28#include <linux/shm.h>
29#include <linux/syscalls.h>
30#include <linux/ptrace.h>
31
32#include <linux/mutex.h>
33#include <asm/uaccess.h>
34
35#include "util.h"
36
37struct compat_msgbuf {
38 compat_long_t mtype;
39 char mtext[1];
40};
41
42struct compat_ipc_perm {
43 key_t key;
44 __compat_uid_t uid;
45 __compat_gid_t gid;
46 __compat_uid_t cuid;
47 __compat_gid_t cgid;
48 compat_mode_t mode;
49 unsigned short seq;
50};
51
52struct compat_semid_ds {
53 struct compat_ipc_perm sem_perm;
54 compat_time_t sem_otime;
55 compat_time_t sem_ctime;
56 compat_uptr_t sem_base;
57 compat_uptr_t sem_pending;
58 compat_uptr_t sem_pending_last;
59 compat_uptr_t undo;
60 unsigned short sem_nsems;
61};
62
63struct compat_msqid_ds {
64 struct compat_ipc_perm msg_perm;
65 compat_uptr_t msg_first;
66 compat_uptr_t msg_last;
67 compat_time_t msg_stime;
68 compat_time_t msg_rtime;
69 compat_time_t msg_ctime;
70 compat_ulong_t msg_lcbytes;
71 compat_ulong_t msg_lqbytes;
72 unsigned short msg_cbytes;
73 unsigned short msg_qnum;
74 unsigned short msg_qbytes;
75 compat_ipc_pid_t msg_lspid;
76 compat_ipc_pid_t msg_lrpid;
77};
78
79struct compat_shmid_ds {
80 struct compat_ipc_perm shm_perm;
81 int shm_segsz;
82 compat_time_t shm_atime;
83 compat_time_t shm_dtime;
84 compat_time_t shm_ctime;
85 compat_ipc_pid_t shm_cpid;
86 compat_ipc_pid_t shm_lpid;
87 unsigned short shm_nattch;
88 unsigned short shm_unused;
89 compat_uptr_t shm_unused2;
90 compat_uptr_t shm_unused3;
91};
92
93struct compat_ipc_kludge {
94 compat_uptr_t msgp;
95 compat_long_t msgtyp;
96};
97
98struct compat_shminfo64 {
99 compat_ulong_t shmmax;
100 compat_ulong_t shmmin;
101 compat_ulong_t shmmni;
102 compat_ulong_t shmseg;
103 compat_ulong_t shmall;
104 compat_ulong_t __unused1;
105 compat_ulong_t __unused2;
106 compat_ulong_t __unused3;
107 compat_ulong_t __unused4;
108};
109
110struct compat_shm_info {
111 compat_int_t used_ids;
112 compat_ulong_t shm_tot, shm_rss, shm_swp;
113 compat_ulong_t swap_attempts, swap_successes;
114};
115
116static inline int compat_ipc_parse_version(int *cmd)
117{
118#ifdef CONFIG_ARCH_WANT_COMPAT_IPC_PARSE_VERSION
119 int version = *cmd & IPC_64;
120
121 /* this is tricky: architectures that have support for the old
122 * ipc structures in 64 bit binaries need to have IPC_64 set
123 * in cmd, the others need to have it cleared */
124#ifndef ipc_parse_version
125 *cmd |= IPC_64;
126#else
127 *cmd &= ~IPC_64;
128#endif
129 return version;
130#else
131 /* With the asm-generic APIs, we always use the 64-bit versions. */
132 return IPC_64;
133#endif
134}
135
136static inline int __get_compat_ipc64_perm(struct ipc64_perm *p64,
137 struct compat_ipc64_perm __user *up64)
138{
139 int err;
140
141 err = __get_user(p64->uid, &up64->uid);
142 err |= __get_user(p64->gid, &up64->gid);
143 err |= __get_user(p64->mode, &up64->mode);
144 return err;
145}
146
147static inline int __get_compat_ipc_perm(struct ipc64_perm *p,
148 struct compat_ipc_perm __user *up)
149{
150 int err;
151
152 err = __get_user(p->uid, &up->uid);
153 err |= __get_user(p->gid, &up->gid);
154 err |= __get_user(p->mode, &up->mode);
155 return err;
156}
157
158static inline int __put_compat_ipc64_perm(struct ipc64_perm *p64,
159 struct compat_ipc64_perm __user *up64)
160{
161 int err;
162
163 err = __put_user(p64->key, &up64->key);
164 err |= __put_user(p64->uid, &up64->uid);
165 err |= __put_user(p64->gid, &up64->gid);
166 err |= __put_user(p64->cuid, &up64->cuid);
167 err |= __put_user(p64->cgid, &up64->cgid);
168 err |= __put_user(p64->mode, &up64->mode);
169 err |= __put_user(p64->seq, &up64->seq);
170 return err;
171}
172
173static inline int __put_compat_ipc_perm(struct ipc64_perm *p,
174 struct compat_ipc_perm __user *up)
175{
176 int err;
177 __compat_uid_t u;
178 __compat_gid_t g;
179
180 err = __put_user(p->key, &up->key);
181 SET_UID(u, p->uid);
182 err |= __put_user(u, &up->uid);
183 SET_GID(g, p->gid);
184 err |= __put_user(g, &up->gid);
185 SET_UID(u, p->cuid);
186 err |= __put_user(u, &up->cuid);
187 SET_GID(g, p->cgid);
188 err |= __put_user(g, &up->cgid);
189 err |= __put_user(p->mode, &up->mode);
190 err |= __put_user(p->seq, &up->seq);
191 return err;
192}
193
194static inline int get_compat_semid64_ds(struct semid64_ds *s64,
195 struct compat_semid64_ds __user *up64)
196{
197 if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
198 return -EFAULT;
199 return __get_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm);
200}
201
202static inline int get_compat_semid_ds(struct semid64_ds *s,
203 struct compat_semid_ds __user *up)
204{
205 if (!access_ok(VERIFY_READ, up, sizeof(*up)))
206 return -EFAULT;
207 return __get_compat_ipc_perm(&s->sem_perm, &up->sem_perm);
208}
209
210static inline int put_compat_semid64_ds(struct semid64_ds *s64,
211 struct compat_semid64_ds __user *up64)
212{
213 int err;
214
215 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
216 return -EFAULT;
217 err = __put_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm);
218 err |= __put_user(s64->sem_otime, &up64->sem_otime);
219 err |= __put_user(s64->sem_ctime, &up64->sem_ctime);
220 err |= __put_user(s64->sem_nsems, &up64->sem_nsems);
221 return err;
222}
223
224static inline int put_compat_semid_ds(struct semid64_ds *s,
225 struct compat_semid_ds __user *up)
226{
227 int err;
228
229 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
230 return -EFAULT;
231 err = __put_compat_ipc_perm(&s->sem_perm, &up->sem_perm);
232 err |= __put_user(s->sem_otime, &up->sem_otime);
233 err |= __put_user(s->sem_ctime, &up->sem_ctime);
234 err |= __put_user(s->sem_nsems, &up->sem_nsems);
235 return err;
236}
237
238static long do_compat_semctl(int first, int second, int third, u32 pad)
239{
240 unsigned long fourth;
241 int err, err2;
242 struct semid64_ds s64;
243 struct semid64_ds __user *up64;
244 int version = compat_ipc_parse_version(&third);
245
246 memset(&s64, 0, sizeof(s64));
247
248 if ((third & (~IPC_64)) == SETVAL)
249#ifdef __BIG_ENDIAN
250 fourth = (unsigned long)pad << 32;
251#else
252 fourth = pad;
253#endif
254 else
255 fourth = (unsigned long)compat_ptr(pad);
256 switch (third & (~IPC_64)) {
257 case IPC_INFO:
258 case IPC_RMID:
259 case SEM_INFO:
260 case GETVAL:
261 case GETPID:
262 case GETNCNT:
263 case GETZCNT:
264 case GETALL:
265 case SETVAL:
266 case SETALL:
267 err = sys_semctl(first, second, third, fourth);
268 break;
269
270 case IPC_STAT:
271 case SEM_STAT:
272 up64 = compat_alloc_user_space(sizeof(s64));
273 fourth = (unsigned long)up64;
274 err = sys_semctl(first, second, third, fourth);
275 if (err < 0)
276 break;
277 if (copy_from_user(&s64, up64, sizeof(s64)))
278 err2 = -EFAULT;
279 else if (version == IPC_64)
280 err2 = put_compat_semid64_ds(&s64, compat_ptr(pad));
281 else
282 err2 = put_compat_semid_ds(&s64, compat_ptr(pad));
283 if (err2)
284 err = -EFAULT;
285 break;
286
287 case IPC_SET:
288 if (version == IPC_64)
289 err = get_compat_semid64_ds(&s64, compat_ptr(pad));
290 else
291 err = get_compat_semid_ds(&s64, compat_ptr(pad));
292
293 up64 = compat_alloc_user_space(sizeof(s64));
294 if (copy_to_user(up64, &s64, sizeof(s64)))
295 err = -EFAULT;
296 if (err)
297 break;
298
299 fourth = (unsigned long)up64;
300 err = sys_semctl(first, second, third, fourth);
301 break;
302
303 default:
304 err = -EINVAL;
305 break;
306 }
307 return err;
308}
309
310static long compat_do_msg_fill(void __user *dest, struct msg_msg *msg, size_t bufsz)
311{
312 struct compat_msgbuf __user *msgp = dest;
313 size_t msgsz;
314
315 if (put_user(msg->m_type, &msgp->mtype))
316 return -EFAULT;
317
318 msgsz = (bufsz > msg->m_ts) ? msg->m_ts : bufsz;
319 if (store_msg(msgp->mtext, msg, msgsz))
320 return -EFAULT;
321 return msgsz;
322}
323
324#ifndef COMPAT_SHMLBA
325#define COMPAT_SHMLBA SHMLBA
326#endif
327
328#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
329COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
330 u32, third, compat_uptr_t, ptr, u32, fifth)
331{
332 int version;
333 u32 pad;
334
335 version = call >> 16; /* hack for backward compatibility */
336 call &= 0xffff;
337
338 switch (call) {
339 case SEMOP:
340 /* struct sembuf is the same on 32 and 64bit :)) */
341 return sys_semtimedop(first, compat_ptr(ptr), second, NULL);
342 case SEMTIMEDOP:
343 return compat_sys_semtimedop(first, compat_ptr(ptr), second,
344 compat_ptr(fifth));
345 case SEMGET:
346 return sys_semget(first, second, third);
347 case SEMCTL:
348 if (!ptr)
349 return -EINVAL;
350 if (get_user(pad, (u32 __user *) compat_ptr(ptr)))
351 return -EFAULT;
352 return do_compat_semctl(first, second, third, pad);
353
354 case MSGSND: {
355 struct compat_msgbuf __user *up = compat_ptr(ptr);
356 compat_long_t type;
357
358 if (first < 0 || second < 0)
359 return -EINVAL;
360
361 if (get_user(type, &up->mtype))
362 return -EFAULT;
363
364 return do_msgsnd(first, type, up->mtext, second, third);
365 }
366 case MSGRCV: {
367 void __user *uptr = compat_ptr(ptr);
368
369 if (first < 0 || second < 0)
370 return -EINVAL;
371
372 if (!version) {
373 struct compat_ipc_kludge ipck;
374 if (!uptr)
375 return -EINVAL;
376 if (copy_from_user(&ipck, uptr, sizeof(ipck)))
377 return -EFAULT;
378 uptr = compat_ptr(ipck.msgp);
379 fifth = ipck.msgtyp;
380 }
381 return do_msgrcv(first, uptr, second, (s32)fifth, third,
382 compat_do_msg_fill);
383 }
384 case MSGGET:
385 return sys_msgget(first, second);
386 case MSGCTL:
387 return compat_sys_msgctl(first, second, compat_ptr(ptr));
388
389 case SHMAT: {
390 int err;
391 unsigned long raddr;
392
393 if (version == 1)
394 return -EINVAL;
395 err = do_shmat(first, compat_ptr(ptr), second, &raddr,
396 COMPAT_SHMLBA);
397 if (err < 0)
398 return err;
399 return put_user(raddr, (compat_ulong_t *)compat_ptr(third));
400 }
401 case SHMDT:
402 return sys_shmdt(compat_ptr(ptr));
403 case SHMGET:
404 return sys_shmget(first, (unsigned)second, third);
405 case SHMCTL:
406 return compat_sys_shmctl(first, second, compat_ptr(ptr));
407 }
408
409 return -ENOSYS;
410}
411#endif
412
413COMPAT_SYSCALL_DEFINE4(semctl, int, semid, int, semnum, int, cmd, int, arg)
414{
415 return do_compat_semctl(semid, semnum, cmd, arg);
416}
417
418COMPAT_SYSCALL_DEFINE4(msgsnd, int, msqid, compat_uptr_t, msgp,
419 compat_ssize_t, msgsz, int, msgflg)
420{
421 struct compat_msgbuf __user *up = compat_ptr(msgp);
422 compat_long_t mtype;
423
424 if (get_user(mtype, &up->mtype))
425 return -EFAULT;
426 return do_msgsnd(msqid, mtype, up->mtext, (ssize_t)msgsz, msgflg);
427}
428
429COMPAT_SYSCALL_DEFINE5(msgrcv, int, msqid, compat_uptr_t, msgp,
430 compat_ssize_t, msgsz, compat_long_t, msgtyp, int, msgflg)
431{
432 return do_msgrcv(msqid, compat_ptr(msgp), (ssize_t)msgsz, (long)msgtyp,
433 msgflg, compat_do_msg_fill);
434}
435
436static inline int get_compat_msqid64(struct msqid64_ds *m64,
437 struct compat_msqid64_ds __user *up64)
438{
439 int err;
440
441 if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
442 return -EFAULT;
443 err = __get_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
444 err |= __get_user(m64->msg_qbytes, &up64->msg_qbytes);
445 return err;
446}
447
448static inline int get_compat_msqid(struct msqid64_ds *m,
449 struct compat_msqid_ds __user *up)
450{
451 int err;
452
453 if (!access_ok(VERIFY_READ, up, sizeof(*up)))
454 return -EFAULT;
455 err = __get_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
456 err |= __get_user(m->msg_qbytes, &up->msg_qbytes);
457 return err;
458}
459
460static inline int put_compat_msqid64_ds(struct msqid64_ds *m64,
461 struct compat_msqid64_ds __user *up64)
462{
463 int err;
464
465 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
466 return -EFAULT;
467 err = __put_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
468 err |= __put_user(m64->msg_stime, &up64->msg_stime);
469 err |= __put_user(m64->msg_rtime, &up64->msg_rtime);
470 err |= __put_user(m64->msg_ctime, &up64->msg_ctime);
471 err |= __put_user(m64->msg_cbytes, &up64->msg_cbytes);
472 err |= __put_user(m64->msg_qnum, &up64->msg_qnum);
473 err |= __put_user(m64->msg_qbytes, &up64->msg_qbytes);
474 err |= __put_user(m64->msg_lspid, &up64->msg_lspid);
475 err |= __put_user(m64->msg_lrpid, &up64->msg_lrpid);
476 return err;
477}
478
479static inline int put_compat_msqid_ds(struct msqid64_ds *m,
480 struct compat_msqid_ds __user *up)
481{
482 int err;
483
484 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
485 return -EFAULT;
486 err = __put_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
487 err |= __put_user(m->msg_stime, &up->msg_stime);
488 err |= __put_user(m->msg_rtime, &up->msg_rtime);
489 err |= __put_user(m->msg_ctime, &up->msg_ctime);
490 err |= __put_user(m->msg_cbytes, &up->msg_cbytes);
491 err |= __put_user(m->msg_qnum, &up->msg_qnum);
492 err |= __put_user(m->msg_qbytes, &up->msg_qbytes);
493 err |= __put_user(m->msg_lspid, &up->msg_lspid);
494 err |= __put_user(m->msg_lrpid, &up->msg_lrpid);
495 return err;
496}
497
498COMPAT_SYSCALL_DEFINE3(msgctl, int, first, int, second, void __user *, uptr)
499{
500 int err, err2;
501 struct msqid64_ds m64;
502 int version = compat_ipc_parse_version(&second);
503 void __user *p;
504
505 memset(&m64, 0, sizeof(m64));
506
507 switch (second & (~IPC_64)) {
508 case IPC_INFO:
509 case IPC_RMID:
510 case MSG_INFO:
511 err = sys_msgctl(first, second, uptr);
512 break;
513
514 case IPC_SET:
515 if (version == IPC_64)
516 err = get_compat_msqid64(&m64, uptr);
517 else
518 err = get_compat_msqid(&m64, uptr);
519
520 if (err)
521 break;
522 p = compat_alloc_user_space(sizeof(m64));
523 if (copy_to_user(p, &m64, sizeof(m64)))
524 err = -EFAULT;
525 else
526 err = sys_msgctl(first, second, p);
527 break;
528
529 case IPC_STAT:
530 case MSG_STAT:
531 p = compat_alloc_user_space(sizeof(m64));
532 err = sys_msgctl(first, second, p);
533 if (err < 0)
534 break;
535 if (copy_from_user(&m64, p, sizeof(m64)))
536 err2 = -EFAULT;
537 else if (version == IPC_64)
538 err2 = put_compat_msqid64_ds(&m64, uptr);
539 else
540 err2 = put_compat_msqid_ds(&m64, uptr);
541 if (err2)
542 err = -EFAULT;
543 break;
544
545 default:
546 err = -EINVAL;
547 break;
548 }
549 return err;
550}
551
552COMPAT_SYSCALL_DEFINE3(shmat, int, shmid, compat_uptr_t, shmaddr, int, shmflg)
553{
554 unsigned long ret;
555 long err;
556
557 err = do_shmat(shmid, compat_ptr(shmaddr), shmflg, &ret, COMPAT_SHMLBA);
558 if (err)
559 return err;
560 force_successful_syscall_return();
561 return (long)ret;
562}
563
564static inline int get_compat_shmid64_ds(struct shmid64_ds *s64,
565 struct compat_shmid64_ds __user *up64)
566{
567 if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
568 return -EFAULT;
569 return __get_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
570}
571
572static inline int get_compat_shmid_ds(struct shmid64_ds *s,
573 struct compat_shmid_ds __user *up)
574{
575 if (!access_ok(VERIFY_READ, up, sizeof(*up)))
576 return -EFAULT;
577 return __get_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
578}
579
580static inline int put_compat_shmid64_ds(struct shmid64_ds *s64,
581 struct compat_shmid64_ds __user *up64)
582{
583 int err;
584
585 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
586 return -EFAULT;
587 err = __put_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
588 err |= __put_user(s64->shm_atime, &up64->shm_atime);
589 err |= __put_user(s64->shm_dtime, &up64->shm_dtime);
590 err |= __put_user(s64->shm_ctime, &up64->shm_ctime);
591 err |= __put_user(s64->shm_segsz, &up64->shm_segsz);
592 err |= __put_user(s64->shm_nattch, &up64->shm_nattch);
593 err |= __put_user(s64->shm_cpid, &up64->shm_cpid);
594 err |= __put_user(s64->shm_lpid, &up64->shm_lpid);
595 return err;
596}
597
598static inline int put_compat_shmid_ds(struct shmid64_ds *s,
599 struct compat_shmid_ds __user *up)
600{
601 int err;
602
603 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
604 return -EFAULT;
605 err = __put_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
606 err |= __put_user(s->shm_atime, &up->shm_atime);
607 err |= __put_user(s->shm_dtime, &up->shm_dtime);
608 err |= __put_user(s->shm_ctime, &up->shm_ctime);
609 err |= __put_user(s->shm_segsz, &up->shm_segsz);
610 err |= __put_user(s->shm_nattch, &up->shm_nattch);
611 err |= __put_user(s->shm_cpid, &up->shm_cpid);
612 err |= __put_user(s->shm_lpid, &up->shm_lpid);
613 return err;
614}
615
616static inline int put_compat_shminfo64(struct shminfo64 *smi,
617 struct compat_shminfo64 __user *up64)
618{
619 int err;
620
621 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
622 return -EFAULT;
623 if (smi->shmmax > INT_MAX)
624 smi->shmmax = INT_MAX;
625 err = __put_user(smi->shmmax, &up64->shmmax);
626 err |= __put_user(smi->shmmin, &up64->shmmin);
627 err |= __put_user(smi->shmmni, &up64->shmmni);
628 err |= __put_user(smi->shmseg, &up64->shmseg);
629 err |= __put_user(smi->shmall, &up64->shmall);
630 return err;
631}
632
633static inline int put_compat_shminfo(struct shminfo64 *smi,
634 struct shminfo __user *up)
635{
636 int err;
637
638 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
639 return -EFAULT;
640 if (smi->shmmax > INT_MAX)
641 smi->shmmax = INT_MAX;
642 err = __put_user(smi->shmmax, &up->shmmax);
643 err |= __put_user(smi->shmmin, &up->shmmin);
644 err |= __put_user(smi->shmmni, &up->shmmni);
645 err |= __put_user(smi->shmseg, &up->shmseg);
646 err |= __put_user(smi->shmall, &up->shmall);
647 return err;
648}
649
650static inline int put_compat_shm_info(struct shm_info __user *ip,
651 struct compat_shm_info __user *uip)
652{
653 int err;
654 struct shm_info si;
655
656 if (!access_ok(VERIFY_WRITE, uip, sizeof(*uip)) ||
657 copy_from_user(&si, ip, sizeof(si)))
658 return -EFAULT;
659 err = __put_user(si.used_ids, &uip->used_ids);
660 err |= __put_user(si.shm_tot, &uip->shm_tot);
661 err |= __put_user(si.shm_rss, &uip->shm_rss);
662 err |= __put_user(si.shm_swp, &uip->shm_swp);
663 err |= __put_user(si.swap_attempts, &uip->swap_attempts);
664 err |= __put_user(si.swap_successes, &uip->swap_successes);
665 return err;
666}
667
668COMPAT_SYSCALL_DEFINE3(shmctl, int, first, int, second, void __user *, uptr)
669{
670 void __user *p;
671 struct shmid64_ds s64;
672 struct shminfo64 smi;
673 int err, err2;
674 int version = compat_ipc_parse_version(&second);
675
676 memset(&s64, 0, sizeof(s64));
677
678 switch (second & (~IPC_64)) {
679 case IPC_RMID:
680 case SHM_LOCK:
681 case SHM_UNLOCK:
682 err = sys_shmctl(first, second, uptr);
683 break;
684
685 case IPC_INFO:
686 p = compat_alloc_user_space(sizeof(smi));
687 err = sys_shmctl(first, second, p);
688 if (err < 0)
689 break;
690 if (copy_from_user(&smi, p, sizeof(smi)))
691 err2 = -EFAULT;
692 else if (version == IPC_64)
693 err2 = put_compat_shminfo64(&smi, uptr);
694 else
695 err2 = put_compat_shminfo(&smi, uptr);
696 if (err2)
697 err = -EFAULT;
698 break;
699
700
701 case IPC_SET:
702 if (version == IPC_64)
703 err = get_compat_shmid64_ds(&s64, uptr);
704 else
705 err = get_compat_shmid_ds(&s64, uptr);
706
707 if (err)
708 break;
709 p = compat_alloc_user_space(sizeof(s64));
710 if (copy_to_user(p, &s64, sizeof(s64)))
711 err = -EFAULT;
712 else
713 err = sys_shmctl(first, second, p);
714 break;
715
716 case IPC_STAT:
717 case SHM_STAT:
718 p = compat_alloc_user_space(sizeof(s64));
719 err = sys_shmctl(first, second, p);
720 if (err < 0)
721 break;
722 if (copy_from_user(&s64, p, sizeof(s64)))
723 err2 = -EFAULT;
724 else if (version == IPC_64)
725 err2 = put_compat_shmid64_ds(&s64, uptr);
726 else
727 err2 = put_compat_shmid_ds(&s64, uptr);
728 if (err2)
729 err = -EFAULT;
730 break;
731
732 case SHM_INFO:
733 p = compat_alloc_user_space(sizeof(struct shm_info));
734 err = sys_shmctl(first, second, p);
735 if (err < 0)
736 break;
737 err2 = put_compat_shm_info(p, uptr);
738 if (err2)
739 err = -EFAULT;
740 break;
741
742 default:
743 err = -EINVAL;
744 break;
745 }
746 return err;
747}
748
749COMPAT_SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsems,
750 unsigned, nsops,
751 const struct compat_timespec __user *, timeout)
752{
753 struct timespec __user *ts64;
754 if (compat_convert_timespec(&ts64, timeout))
755 return -EFAULT;
756 return sys_semtimedop(semid, tsems, nsops, ts64);
757}