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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 | |
37 | struct compat_msgbuf { |
38 | compat_long_t mtype; |
39 | char mtext[1]; |
40 | }; |
41 | |
42 | struct 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 | |
52 | struct 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 | |
63 | struct 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 | |
79 | struct 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 | |
93 | struct compat_ipc_kludge { |
94 | compat_uptr_t msgp; |
95 | compat_long_t msgtyp; |
96 | }; |
97 | |
98 | struct 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 | |
110 | struct 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 | |
116 | extern int sem_ctls[]; |
117 | #define sc_semopm (sem_ctls[2]) |
118 | |
119 | static inline int compat_ipc_parse_version(int *cmd) |
120 | { |
121 | #ifdef CONFIG_ARCH_WANT_COMPAT_IPC_PARSE_VERSION |
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 | |
139 | static 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 | |
150 | static 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 | |
161 | static 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 | |
176 | static 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 | |
197 | static 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 | |
205 | static 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 | |
213 | static 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 | |
227 | static 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 | |
241 | static 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 | long compat_do_msg_fill(void __user *dest, struct msg_msg *msg, size_t bufsz) |
310 | { |
311 | struct compat_msgbuf __user *msgp = dest; |
312 | size_t msgsz; |
313 | |
314 | if (put_user(msg->m_type, &msgp->mtype)) |
315 | return -EFAULT; |
316 | |
317 | msgsz = (bufsz > msg->m_ts) ? msg->m_ts : bufsz; |
318 | if (store_msg(msgp->mtext, msg, msgsz)) |
319 | return -EFAULT; |
320 | return msgsz; |
321 | } |
322 | |
323 | #ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC |
324 | long compat_sys_semctl(int first, int second, int third, void __user *uptr) |
325 | { |
326 | u32 pad; |
327 | |
328 | if (!uptr) |
329 | return -EINVAL; |
330 | if (get_user(pad, (u32 __user *) uptr)) |
331 | return -EFAULT; |
332 | return do_compat_semctl(first, second, third, pad); |
333 | } |
334 | |
335 | long compat_sys_msgsnd(int first, int second, int third, void __user *uptr) |
336 | { |
337 | struct compat_msgbuf __user *up = uptr; |
338 | long type; |
339 | |
340 | if (first < 0) |
341 | return -EINVAL; |
342 | if (second < 0) |
343 | return -EINVAL; |
344 | |
345 | if (get_user(type, &up->mtype)) |
346 | return -EFAULT; |
347 | |
348 | return do_msgsnd(first, type, up->mtext, second, third); |
349 | } |
350 | |
351 | long compat_sys_msgrcv(int first, int second, int msgtyp, int third, |
352 | int version, void __user *uptr) |
353 | { |
354 | if (first < 0) |
355 | return -EINVAL; |
356 | if (second < 0) |
357 | return -EINVAL; |
358 | |
359 | if (!version) { |
360 | struct compat_ipc_kludge ipck; |
361 | if (!uptr) |
362 | return -EINVAL; |
363 | if (copy_from_user (&ipck, uptr, sizeof(ipck))) |
364 | return -EFAULT; |
365 | uptr = compat_ptr(ipck.msgp); |
366 | msgtyp = ipck.msgtyp; |
367 | } |
368 | return do_msgrcv(first, uptr, second, msgtyp, third, |
369 | compat_do_msg_fill); |
370 | } |
371 | #else |
372 | long compat_sys_semctl(int semid, int semnum, int cmd, int arg) |
373 | { |
374 | return do_compat_semctl(semid, semnum, cmd, arg); |
375 | } |
376 | |
377 | long compat_sys_msgsnd(int msqid, struct compat_msgbuf __user *msgp, |
378 | compat_ssize_t msgsz, int msgflg) |
379 | { |
380 | compat_long_t mtype; |
381 | |
382 | if (get_user(mtype, &msgp->mtype)) |
383 | return -EFAULT; |
384 | return do_msgsnd(msqid, mtype, msgp->mtext, (ssize_t)msgsz, msgflg); |
385 | } |
386 | |
387 | long compat_sys_msgrcv(int msqid, struct compat_msgbuf __user *msgp, |
388 | compat_ssize_t msgsz, long msgtyp, int msgflg) |
389 | { |
390 | return do_msgrcv(msqid, msgp, (ssize_t)msgsz, msgtyp, msgflg, |
391 | compat_do_msg_fill); |
392 | } |
393 | #endif |
394 | |
395 | static inline int get_compat_msqid64(struct msqid64_ds *m64, |
396 | struct compat_msqid64_ds __user *up64) |
397 | { |
398 | int err; |
399 | |
400 | if (!access_ok(VERIFY_READ, up64, sizeof(*up64))) |
401 | return -EFAULT; |
402 | err = __get_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm); |
403 | err |= __get_user(m64->msg_qbytes, &up64->msg_qbytes); |
404 | return err; |
405 | } |
406 | |
407 | static inline int get_compat_msqid(struct msqid64_ds *m, |
408 | struct compat_msqid_ds __user *up) |
409 | { |
410 | int err; |
411 | |
412 | if (!access_ok(VERIFY_READ, up, sizeof(*up))) |
413 | return -EFAULT; |
414 | err = __get_compat_ipc_perm(&m->msg_perm, &up->msg_perm); |
415 | err |= __get_user(m->msg_qbytes, &up->msg_qbytes); |
416 | return err; |
417 | } |
418 | |
419 | static inline int put_compat_msqid64_ds(struct msqid64_ds *m64, |
420 | struct compat_msqid64_ds __user *up64) |
421 | { |
422 | int err; |
423 | |
424 | if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) |
425 | return -EFAULT; |
426 | err = __put_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm); |
427 | err |= __put_user(m64->msg_stime, &up64->msg_stime); |
428 | err |= __put_user(m64->msg_rtime, &up64->msg_rtime); |
429 | err |= __put_user(m64->msg_ctime, &up64->msg_ctime); |
430 | err |= __put_user(m64->msg_cbytes, &up64->msg_cbytes); |
431 | err |= __put_user(m64->msg_qnum, &up64->msg_qnum); |
432 | err |= __put_user(m64->msg_qbytes, &up64->msg_qbytes); |
433 | err |= __put_user(m64->msg_lspid, &up64->msg_lspid); |
434 | err |= __put_user(m64->msg_lrpid, &up64->msg_lrpid); |
435 | return err; |
436 | } |
437 | |
438 | static inline int put_compat_msqid_ds(struct msqid64_ds *m, |
439 | struct compat_msqid_ds __user *up) |
440 | { |
441 | int err; |
442 | |
443 | if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) |
444 | return -EFAULT; |
445 | err = __put_compat_ipc_perm(&m->msg_perm, &up->msg_perm); |
446 | err |= __put_user(m->msg_stime, &up->msg_stime); |
447 | err |= __put_user(m->msg_rtime, &up->msg_rtime); |
448 | err |= __put_user(m->msg_ctime, &up->msg_ctime); |
449 | err |= __put_user(m->msg_cbytes, &up->msg_cbytes); |
450 | err |= __put_user(m->msg_qnum, &up->msg_qnum); |
451 | err |= __put_user(m->msg_qbytes, &up->msg_qbytes); |
452 | err |= __put_user(m->msg_lspid, &up->msg_lspid); |
453 | err |= __put_user(m->msg_lrpid, &up->msg_lrpid); |
454 | return err; |
455 | } |
456 | |
457 | long compat_sys_msgctl(int first, int second, void __user *uptr) |
458 | { |
459 | int err, err2; |
460 | struct msqid64_ds m64; |
461 | int version = compat_ipc_parse_version(&second); |
462 | void __user *p; |
463 | |
464 | memset(&m64, 0, sizeof(m64)); |
465 | |
466 | switch (second & (~IPC_64)) { |
467 | case IPC_INFO: |
468 | case IPC_RMID: |
469 | case MSG_INFO: |
470 | err = sys_msgctl(first, second, uptr); |
471 | break; |
472 | |
473 | case IPC_SET: |
474 | if (version == IPC_64) { |
475 | err = get_compat_msqid64(&m64, uptr); |
476 | } else { |
477 | err = get_compat_msqid(&m64, uptr); |
478 | } |
479 | if (err) |
480 | break; |
481 | p = compat_alloc_user_space(sizeof(m64)); |
482 | if (copy_to_user(p, &m64, sizeof(m64))) |
483 | err = -EFAULT; |
484 | else |
485 | err = sys_msgctl(first, second, p); |
486 | break; |
487 | |
488 | case IPC_STAT: |
489 | case MSG_STAT: |
490 | p = compat_alloc_user_space(sizeof(m64)); |
491 | err = sys_msgctl(first, second, p); |
492 | if (err < 0) |
493 | break; |
494 | if (copy_from_user(&m64, p, sizeof(m64))) |
495 | err2 = -EFAULT; |
496 | else if (version == IPC_64) |
497 | err2 = put_compat_msqid64_ds(&m64, uptr); |
498 | else |
499 | err2 = put_compat_msqid_ds(&m64, uptr); |
500 | if (err2) |
501 | err = -EFAULT; |
502 | break; |
503 | |
504 | default: |
505 | err = -EINVAL; |
506 | break; |
507 | } |
508 | return err; |
509 | } |
510 | |
511 | #ifndef COMPAT_SHMLBA |
512 | #define COMPAT_SHMLBA SHMLBA |
513 | #endif |
514 | |
515 | #ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC |
516 | long compat_sys_shmat(int first, int second, compat_uptr_t third, int version, |
517 | void __user *uptr) |
518 | { |
519 | int err; |
520 | unsigned long raddr; |
521 | compat_ulong_t __user *uaddr; |
522 | |
523 | if (version == 1) |
524 | return -EINVAL; |
525 | err = do_shmat(first, uptr, second, &raddr, COMPAT_SHMLBA); |
526 | if (err < 0) |
527 | return err; |
528 | uaddr = compat_ptr(third); |
529 | return put_user(raddr, uaddr); |
530 | } |
531 | #else |
532 | long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg) |
533 | { |
534 | unsigned long ret; |
535 | long err; |
536 | |
537 | err = do_shmat(shmid, compat_ptr(shmaddr), shmflg, &ret, COMPAT_SHMLBA); |
538 | if (err) |
539 | return err; |
540 | force_successful_syscall_return(); |
541 | return (long)ret; |
542 | } |
543 | #endif |
544 | |
545 | static inline int get_compat_shmid64_ds(struct shmid64_ds *s64, |
546 | struct compat_shmid64_ds __user *up64) |
547 | { |
548 | if (!access_ok(VERIFY_READ, up64, sizeof(*up64))) |
549 | return -EFAULT; |
550 | return __get_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm); |
551 | } |
552 | |
553 | static inline int get_compat_shmid_ds(struct shmid64_ds *s, |
554 | struct compat_shmid_ds __user *up) |
555 | { |
556 | if (!access_ok(VERIFY_READ, up, sizeof(*up))) |
557 | return -EFAULT; |
558 | return __get_compat_ipc_perm(&s->shm_perm, &up->shm_perm); |
559 | } |
560 | |
561 | static inline int put_compat_shmid64_ds(struct shmid64_ds *s64, |
562 | struct compat_shmid64_ds __user *up64) |
563 | { |
564 | int err; |
565 | |
566 | if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) |
567 | return -EFAULT; |
568 | err = __put_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm); |
569 | err |= __put_user(s64->shm_atime, &up64->shm_atime); |
570 | err |= __put_user(s64->shm_dtime, &up64->shm_dtime); |
571 | err |= __put_user(s64->shm_ctime, &up64->shm_ctime); |
572 | err |= __put_user(s64->shm_segsz, &up64->shm_segsz); |
573 | err |= __put_user(s64->shm_nattch, &up64->shm_nattch); |
574 | err |= __put_user(s64->shm_cpid, &up64->shm_cpid); |
575 | err |= __put_user(s64->shm_lpid, &up64->shm_lpid); |
576 | return err; |
577 | } |
578 | |
579 | static inline int put_compat_shmid_ds(struct shmid64_ds *s, |
580 | struct compat_shmid_ds __user *up) |
581 | { |
582 | int err; |
583 | |
584 | if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) |
585 | return -EFAULT; |
586 | err = __put_compat_ipc_perm(&s->shm_perm, &up->shm_perm); |
587 | err |= __put_user(s->shm_atime, &up->shm_atime); |
588 | err |= __put_user(s->shm_dtime, &up->shm_dtime); |
589 | err |= __put_user(s->shm_ctime, &up->shm_ctime); |
590 | err |= __put_user(s->shm_segsz, &up->shm_segsz); |
591 | err |= __put_user(s->shm_nattch, &up->shm_nattch); |
592 | err |= __put_user(s->shm_cpid, &up->shm_cpid); |
593 | err |= __put_user(s->shm_lpid, &up->shm_lpid); |
594 | return err; |
595 | } |
596 | |
597 | static inline int put_compat_shminfo64(struct shminfo64 *smi, |
598 | struct compat_shminfo64 __user *up64) |
599 | { |
600 | int err; |
601 | |
602 | if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) |
603 | return -EFAULT; |
604 | if (smi->shmmax > INT_MAX) |
605 | smi->shmmax = INT_MAX; |
606 | err = __put_user(smi->shmmax, &up64->shmmax); |
607 | err |= __put_user(smi->shmmin, &up64->shmmin); |
608 | err |= __put_user(smi->shmmni, &up64->shmmni); |
609 | err |= __put_user(smi->shmseg, &up64->shmseg); |
610 | err |= __put_user(smi->shmall, &up64->shmall); |
611 | return err; |
612 | } |
613 | |
614 | static inline int put_compat_shminfo(struct shminfo64 *smi, |
615 | struct shminfo __user *up) |
616 | { |
617 | int err; |
618 | |
619 | if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) |
620 | return -EFAULT; |
621 | if (smi->shmmax > INT_MAX) |
622 | smi->shmmax = INT_MAX; |
623 | err = __put_user(smi->shmmax, &up->shmmax); |
624 | err |= __put_user(smi->shmmin, &up->shmmin); |
625 | err |= __put_user(smi->shmmni, &up->shmmni); |
626 | err |= __put_user(smi->shmseg, &up->shmseg); |
627 | err |= __put_user(smi->shmall, &up->shmall); |
628 | return err; |
629 | } |
630 | |
631 | static inline int put_compat_shm_info(struct shm_info __user *ip, |
632 | struct compat_shm_info __user *uip) |
633 | { |
634 | int err; |
635 | struct shm_info si; |
636 | |
637 | if (!access_ok(VERIFY_WRITE, uip, sizeof(*uip)) || |
638 | copy_from_user(&si, ip, sizeof(si))) |
639 | return -EFAULT; |
640 | err = __put_user(si.used_ids, &uip->used_ids); |
641 | err |= __put_user(si.shm_tot, &uip->shm_tot); |
642 | err |= __put_user(si.shm_rss, &uip->shm_rss); |
643 | err |= __put_user(si.shm_swp, &uip->shm_swp); |
644 | err |= __put_user(si.swap_attempts, &uip->swap_attempts); |
645 | err |= __put_user(si.swap_successes, &uip->swap_successes); |
646 | return err; |
647 | } |
648 | |
649 | long compat_sys_shmctl(int first, int second, void __user *uptr) |
650 | { |
651 | void __user *p; |
652 | struct shmid64_ds s64; |
653 | struct shminfo64 smi; |
654 | int err, err2; |
655 | int version = compat_ipc_parse_version(&second); |
656 | |
657 | memset(&s64, 0, sizeof(s64)); |
658 | |
659 | switch (second & (~IPC_64)) { |
660 | case IPC_RMID: |
661 | case SHM_LOCK: |
662 | case SHM_UNLOCK: |
663 | err = sys_shmctl(first, second, uptr); |
664 | break; |
665 | |
666 | case IPC_INFO: |
667 | p = compat_alloc_user_space(sizeof(smi)); |
668 | err = sys_shmctl(first, second, p); |
669 | if (err < 0) |
670 | break; |
671 | if (copy_from_user(&smi, p, sizeof(smi))) |
672 | err2 = -EFAULT; |
673 | else if (version == IPC_64) |
674 | err2 = put_compat_shminfo64(&smi, uptr); |
675 | else |
676 | err2 = put_compat_shminfo(&smi, uptr); |
677 | if (err2) |
678 | err = -EFAULT; |
679 | break; |
680 | |
681 | |
682 | case IPC_SET: |
683 | if (version == IPC_64) { |
684 | err = get_compat_shmid64_ds(&s64, uptr); |
685 | } else { |
686 | err = get_compat_shmid_ds(&s64, uptr); |
687 | } |
688 | if (err) |
689 | break; |
690 | p = compat_alloc_user_space(sizeof(s64)); |
691 | if (copy_to_user(p, &s64, sizeof(s64))) |
692 | err = -EFAULT; |
693 | else |
694 | err = sys_shmctl(first, second, p); |
695 | break; |
696 | |
697 | case IPC_STAT: |
698 | case SHM_STAT: |
699 | p = compat_alloc_user_space(sizeof(s64)); |
700 | err = sys_shmctl(first, second, p); |
701 | if (err < 0) |
702 | break; |
703 | if (copy_from_user(&s64, p, sizeof(s64))) |
704 | err2 = -EFAULT; |
705 | else if (version == IPC_64) |
706 | err2 = put_compat_shmid64_ds(&s64, uptr); |
707 | else |
708 | err2 = put_compat_shmid_ds(&s64, uptr); |
709 | if (err2) |
710 | err = -EFAULT; |
711 | break; |
712 | |
713 | case SHM_INFO: |
714 | p = compat_alloc_user_space(sizeof(struct shm_info)); |
715 | err = sys_shmctl(first, second, p); |
716 | if (err < 0) |
717 | break; |
718 | err2 = put_compat_shm_info(p, uptr); |
719 | if (err2) |
720 | err = -EFAULT; |
721 | break; |
722 | |
723 | default: |
724 | err = -EINVAL; |
725 | break; |
726 | } |
727 | return err; |
728 | } |
729 | |
730 | long compat_sys_semtimedop(int semid, struct sembuf __user *tsems, |
731 | unsigned nsops, const struct compat_timespec __user *timeout) |
732 | { |
733 | struct timespec __user *ts64 = NULL; |
734 | if (timeout) { |
735 | struct timespec ts; |
736 | ts64 = compat_alloc_user_space(sizeof(*ts64)); |
737 | if (get_compat_timespec(&ts, timeout)) |
738 | return -EFAULT; |
739 | if (copy_to_user(ts64, &ts, sizeof(ts))) |
740 | return -EFAULT; |
741 | } |
742 | return sys_semtimedop(semid, tsems, nsops, ts64); |
743 | } |
744 |
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v2.6.34-rc5
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