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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 <linux/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 | static 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 | |
136 | static 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 | |
147 | static 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 | |
158 | static 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 | |
173 | static inline int __put_compat_ipc_perm(struct ipc64_perm *p, |
174 | struct compat_ipc_perm __user *uip) |
175 | { |
176 | int err; |
177 | __compat_uid_t u; |
178 | __compat_gid_t g; |
179 | |
180 | err = __put_user(p->key, &uip->key); |
181 | SET_UID(u, p->uid); |
182 | err |= __put_user(u, &uip->uid); |
183 | SET_GID(g, p->gid); |
184 | err |= __put_user(g, &uip->gid); |
185 | SET_UID(u, p->cuid); |
186 | err |= __put_user(u, &uip->cuid); |
187 | SET_GID(g, p->cgid); |
188 | err |= __put_user(g, &uip->cgid); |
189 | err |= __put_user(p->mode, &uip->mode); |
190 | err |= __put_user(p->seq, &uip->seq); |
191 | return err; |
192 | } |
193 | |
194 | static inline int get_compat_semid64_ds(struct semid64_ds *sem64, |
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(&sem64->sem_perm, &up64->sem_perm); |
200 | } |
201 | |
202 | static 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 | |
210 | static inline int put_compat_semid64_ds(struct semid64_ds *sem64, |
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(&sem64->sem_perm, &up64->sem_perm); |
218 | err |= __put_user(sem64->sem_otime, &up64->sem_otime); |
219 | err |= __put_user(sem64->sem_ctime, &up64->sem_ctime); |
220 | err |= __put_user(sem64->sem_nsems, &up64->sem_nsems); |
221 | return err; |
222 | } |
223 | |
224 | static 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 | |
238 | static 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 sem64; |
243 | struct semid64_ds __user *up64; |
244 | int version = compat_ipc_parse_version(&third); |
245 | |
246 | memset(&sem64, 0, sizeof(sem64)); |
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(sem64)); |
273 | fourth = (unsigned long)up64; |
274 | err = sys_semctl(first, second, third, fourth); |
275 | if (err < 0) |
276 | break; |
277 | if (copy_from_user(&sem64, up64, sizeof(sem64))) |
278 | err2 = -EFAULT; |
279 | else if (version == IPC_64) |
280 | err2 = put_compat_semid64_ds(&sem64, compat_ptr(pad)); |
281 | else |
282 | err2 = put_compat_semid_ds(&sem64, 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(&sem64, compat_ptr(pad)); |
290 | else |
291 | err = get_compat_semid_ds(&sem64, compat_ptr(pad)); |
292 | |
293 | up64 = compat_alloc_user_space(sizeof(sem64)); |
294 | if (copy_to_user(up64, &sem64, sizeof(sem64))) |
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 | |
310 | static 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 |
329 | COMPAT_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 | |
413 | COMPAT_SYSCALL_DEFINE4(semctl, int, semid, int, semnum, int, cmd, int, arg) |
414 | { |
415 | return do_compat_semctl(semid, semnum, cmd, arg); |
416 | } |
417 | |
418 | COMPAT_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 | |
429 | COMPAT_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 | |
436 | static 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 | |
448 | static 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 | |
460 | static 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 | |
479 | static 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 | |
498 | COMPAT_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 | |
552 | COMPAT_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 | |
564 | static inline int get_compat_shmid64_ds(struct shmid64_ds *sem64, |
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(&sem64->shm_perm, &up64->shm_perm); |
570 | } |
571 | |
572 | static 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 | |
580 | static inline int put_compat_shmid64_ds(struct shmid64_ds *sem64, |
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(&sem64->shm_perm, &up64->shm_perm); |
588 | err |= __put_user(sem64->shm_atime, &up64->shm_atime); |
589 | err |= __put_user(sem64->shm_dtime, &up64->shm_dtime); |
590 | err |= __put_user(sem64->shm_ctime, &up64->shm_ctime); |
591 | err |= __put_user(sem64->shm_segsz, &up64->shm_segsz); |
592 | err |= __put_user(sem64->shm_nattch, &up64->shm_nattch); |
593 | err |= __put_user(sem64->shm_cpid, &up64->shm_cpid); |
594 | err |= __put_user(sem64->shm_lpid, &up64->shm_lpid); |
595 | return err; |
596 | } |
597 | |
598 | static 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 | |
616 | static 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 | |
633 | static 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 | |
650 | static 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 | |
668 | COMPAT_SYSCALL_DEFINE3(shmctl, int, first, int, second, void __user *, uptr) |
669 | { |
670 | void __user *p; |
671 | struct shmid64_ds sem64; |
672 | struct shminfo64 smi; |
673 | int err, err2; |
674 | int version = compat_ipc_parse_version(&second); |
675 | |
676 | memset(&sem64, 0, sizeof(sem64)); |
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(&sem64, uptr); |
704 | else |
705 | err = get_compat_shmid_ds(&sem64, uptr); |
706 | |
707 | if (err) |
708 | break; |
709 | p = compat_alloc_user_space(sizeof(sem64)); |
710 | if (copy_to_user(p, &sem64, sizeof(sem64))) |
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(sem64)); |
719 | err = sys_shmctl(first, second, p); |
720 | if (err < 0) |
721 | break; |
722 | if (copy_from_user(&sem64, p, sizeof(sem64))) |
723 | err2 = -EFAULT; |
724 | else if (version == IPC_64) |
725 | err2 = put_compat_shmid64_ds(&sem64, uptr); |
726 | else |
727 | err2 = put_compat_shmid_ds(&sem64, 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 | |
749 | COMPAT_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 | } |
758 |
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