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1da177e4 LT |
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> | |
1da177e4 LT |
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/slab.h> | |
30 | #include <linux/syscalls.h> | |
31 | ||
5f921ae9 | 32 | #include <linux/mutex.h> |
1da177e4 LT |
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; | |
202e5979 SR |
44 | __compat_uid_t uid; |
45 | __compat_gid_t gid; | |
46 | __compat_uid_t cuid; | |
47 | __compat_gid_t cgid; | |
1da177e4 LT |
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 | #define MAXBUF (64*1024) | |
119 | ||
120 | static inline int compat_ipc_parse_version(int *cmd) | |
121 | { | |
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 | } | |
134 | ||
135 | static inline int __get_compat_ipc64_perm(struct ipc64_perm *p64, | |
136 | struct compat_ipc64_perm __user *up64) | |
137 | { | |
138 | int err; | |
139 | ||
140 | err = __get_user(p64->uid, &up64->uid); | |
141 | err |= __get_user(p64->gid, &up64->gid); | |
142 | err |= __get_user(p64->mode, &up64->mode); | |
143 | return err; | |
144 | } | |
145 | ||
146 | static inline int __get_compat_ipc_perm(struct ipc64_perm *p, | |
147 | struct compat_ipc_perm __user *up) | |
148 | { | |
149 | int err; | |
150 | ||
151 | err = __get_user(p->uid, &up->uid); | |
152 | err |= __get_user(p->gid, &up->gid); | |
153 | err |= __get_user(p->mode, &up->mode); | |
154 | return err; | |
155 | } | |
156 | ||
157 | static inline int __put_compat_ipc64_perm(struct ipc64_perm *p64, | |
158 | struct compat_ipc64_perm __user *up64) | |
159 | { | |
160 | int err; | |
161 | ||
162 | err = __put_user(p64->key, &up64->key); | |
163 | err |= __put_user(p64->uid, &up64->uid); | |
164 | err |= __put_user(p64->gid, &up64->gid); | |
165 | err |= __put_user(p64->cuid, &up64->cuid); | |
166 | err |= __put_user(p64->cgid, &up64->cgid); | |
167 | err |= __put_user(p64->mode, &up64->mode); | |
168 | err |= __put_user(p64->seq, &up64->seq); | |
169 | return err; | |
170 | } | |
171 | ||
172 | static inline int __put_compat_ipc_perm(struct ipc64_perm *p, | |
173 | struct compat_ipc_perm __user *up) | |
174 | { | |
175 | int err; | |
202e5979 SR |
176 | __compat_uid_t u; |
177 | __compat_gid_t g; | |
1da177e4 LT |
178 | |
179 | err = __put_user(p->key, &up->key); | |
180 | SET_UID(u, p->uid); | |
181 | err |= __put_user(u, &up->uid); | |
182 | SET_GID(g, p->gid); | |
183 | err |= __put_user(g, &up->gid); | |
184 | SET_UID(u, p->cuid); | |
185 | err |= __put_user(u, &up->cuid); | |
186 | SET_GID(g, p->cgid); | |
187 | err |= __put_user(g, &up->cgid); | |
188 | err |= __put_user(p->mode, &up->mode); | |
189 | err |= __put_user(p->seq, &up->seq); | |
190 | return err; | |
191 | } | |
192 | ||
193 | static inline int get_compat_semid64_ds(struct semid64_ds *s64, | |
194 | struct compat_semid64_ds __user *up64) | |
195 | { | |
196 | if (!access_ok (VERIFY_READ, up64, sizeof(*up64))) | |
197 | return -EFAULT; | |
198 | return __get_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm); | |
199 | } | |
200 | ||
201 | static inline int get_compat_semid_ds(struct semid64_ds *s, | |
202 | struct compat_semid_ds __user *up) | |
203 | { | |
204 | if (!access_ok (VERIFY_READ, up, sizeof(*up))) | |
205 | return -EFAULT; | |
206 | return __get_compat_ipc_perm(&s->sem_perm, &up->sem_perm); | |
207 | } | |
208 | ||
209 | static inline int put_compat_semid64_ds(struct semid64_ds *s64, | |
210 | struct compat_semid64_ds __user *up64) | |
211 | { | |
212 | int err; | |
213 | ||
214 | if (!access_ok (VERIFY_WRITE, up64, sizeof(*up64))) | |
215 | return -EFAULT; | |
216 | err = __put_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm); | |
217 | err |= __put_user(s64->sem_otime, &up64->sem_otime); | |
218 | err |= __put_user(s64->sem_ctime, &up64->sem_ctime); | |
219 | err |= __put_user(s64->sem_nsems, &up64->sem_nsems); | |
220 | return err; | |
221 | } | |
222 | ||
223 | static inline int put_compat_semid_ds(struct semid64_ds *s, | |
224 | struct compat_semid_ds __user *up) | |
225 | { | |
226 | int err; | |
227 | ||
228 | if (!access_ok (VERIFY_WRITE, up, sizeof(*up))) | |
229 | err = -EFAULT; | |
230 | err = __put_compat_ipc_perm(&s->sem_perm, &up->sem_perm); | |
231 | err |= __put_user(s->sem_otime, &up->sem_otime); | |
232 | err |= __put_user(s->sem_ctime, &up->sem_ctime); | |
233 | err |= __put_user(s->sem_nsems, &up->sem_nsems); | |
234 | return err; | |
235 | } | |
236 | ||
237 | long compat_sys_semctl(int first, int second, int third, void __user *uptr) | |
238 | { | |
239 | union semun fourth; | |
240 | u32 pad; | |
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 | if (!uptr) | |
247 | return -EINVAL; | |
248 | if (get_user(pad, (u32 __user *) uptr)) | |
249 | return -EFAULT; | |
250 | if ((third & (~IPC_64)) == SETVAL) | |
251 | fourth.val = (int) pad; | |
252 | else | |
253 | fourth.__pad = compat_ptr(pad); | |
254 | switch (third & (~IPC_64)) { | |
255 | case IPC_INFO: | |
256 | case IPC_RMID: | |
257 | case SEM_INFO: | |
258 | case GETVAL: | |
259 | case GETPID: | |
260 | case GETNCNT: | |
261 | case GETZCNT: | |
262 | case GETALL: | |
263 | case SETVAL: | |
264 | case SETALL: | |
265 | err = sys_semctl(first, second, third, fourth); | |
266 | break; | |
267 | ||
268 | case IPC_STAT: | |
269 | case SEM_STAT: | |
270 | up64 = compat_alloc_user_space(sizeof(s64)); | |
271 | fourth.__pad = up64; | |
272 | err = sys_semctl(first, second, third, fourth); | |
273 | if (err < 0) | |
274 | break; | |
275 | if (copy_from_user(&s64, up64, sizeof(s64))) | |
276 | err2 = -EFAULT; | |
277 | else if (version == IPC_64) | |
278 | err2 = put_compat_semid64_ds(&s64, compat_ptr(pad)); | |
279 | else | |
280 | err2 = put_compat_semid_ds(&s64, compat_ptr(pad)); | |
281 | if (err2) | |
282 | err = -EFAULT; | |
283 | break; | |
284 | ||
285 | case IPC_SET: | |
286 | if (version == IPC_64) { | |
287 | err = get_compat_semid64_ds(&s64, compat_ptr(pad)); | |
288 | } else { | |
289 | err = get_compat_semid_ds(&s64, compat_ptr(pad)); | |
290 | } | |
291 | up64 = compat_alloc_user_space(sizeof(s64)); | |
292 | if (copy_to_user(up64, &s64, sizeof(s64))) | |
293 | err = -EFAULT; | |
294 | if (err) | |
295 | break; | |
296 | ||
297 | fourth.__pad = up64; | |
298 | err = sys_semctl(first, second, third, fourth); | |
299 | break; | |
300 | ||
301 | default: | |
302 | err = -EINVAL; | |
303 | break; | |
304 | } | |
305 | return err; | |
306 | } | |
307 | ||
308 | long compat_sys_msgsnd(int first, int second, int third, void __user *uptr) | |
309 | { | |
310 | struct msgbuf __user *p; | |
311 | struct compat_msgbuf __user *up = uptr; | |
312 | long type; | |
313 | ||
314 | if (first < 0) | |
315 | return -EINVAL; | |
316 | if (second < 0 || (second >= MAXBUF - sizeof(struct msgbuf))) | |
317 | return -EINVAL; | |
318 | ||
319 | p = compat_alloc_user_space(second + sizeof(struct msgbuf)); | |
320 | if (get_user(type, &up->mtype) || | |
321 | put_user(type, &p->mtype) || | |
322 | copy_in_user(p->mtext, up->mtext, second)) | |
323 | return -EFAULT; | |
324 | ||
325 | return sys_msgsnd(first, p, second, third); | |
326 | } | |
327 | ||
328 | long compat_sys_msgrcv(int first, int second, int msgtyp, int third, | |
329 | int version, void __user *uptr) | |
330 | { | |
331 | struct msgbuf __user *p; | |
332 | struct compat_msgbuf __user *up; | |
333 | long type; | |
334 | int err; | |
335 | ||
336 | if (first < 0) | |
337 | return -EINVAL; | |
338 | if (second < 0 || (second >= MAXBUF - sizeof(struct msgbuf))) | |
339 | return -EINVAL; | |
340 | ||
341 | if (!version) { | |
342 | struct compat_ipc_kludge ipck; | |
343 | err = -EINVAL; | |
344 | if (!uptr) | |
345 | goto out; | |
346 | err = -EFAULT; | |
347 | if (copy_from_user (&ipck, uptr, sizeof(ipck))) | |
348 | goto out; | |
349 | uptr = compat_ptr(ipck.msgp); | |
350 | msgtyp = ipck.msgtyp; | |
351 | } | |
352 | p = compat_alloc_user_space(second + sizeof(struct msgbuf)); | |
353 | err = sys_msgrcv(first, p, second, msgtyp, third); | |
354 | if (err < 0) | |
355 | goto out; | |
356 | up = uptr; | |
357 | if (get_user(type, &p->mtype) || | |
358 | put_user(type, &up->mtype) || | |
359 | copy_in_user(up->mtext, p->mtext, err)) | |
360 | err = -EFAULT; | |
361 | out: | |
362 | return err; | |
363 | } | |
364 | ||
365 | static inline int get_compat_msqid64(struct msqid64_ds *m64, | |
366 | struct compat_msqid64_ds __user *up64) | |
367 | { | |
368 | int err; | |
369 | ||
370 | if (!access_ok(VERIFY_READ, up64, sizeof(*up64))) | |
371 | return -EFAULT; | |
372 | err = __get_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm); | |
373 | err |= __get_user(m64->msg_qbytes, &up64->msg_qbytes); | |
374 | return err; | |
375 | } | |
376 | ||
377 | static inline int get_compat_msqid(struct msqid64_ds *m, | |
378 | struct compat_msqid_ds __user *up) | |
379 | { | |
380 | int err; | |
381 | ||
382 | if (!access_ok(VERIFY_READ, up, sizeof(*up))) | |
383 | return -EFAULT; | |
384 | err = __get_compat_ipc_perm(&m->msg_perm, &up->msg_perm); | |
385 | err |= __get_user(m->msg_qbytes, &up->msg_qbytes); | |
386 | return err; | |
387 | } | |
388 | ||
389 | static inline int put_compat_msqid64_ds(struct msqid64_ds *m64, | |
390 | struct compat_msqid64_ds __user *up64) | |
391 | { | |
392 | int err; | |
393 | ||
394 | if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) | |
395 | return -EFAULT; | |
396 | err = __put_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm); | |
397 | err |= __put_user(m64->msg_stime, &up64->msg_stime); | |
398 | err |= __put_user(m64->msg_rtime, &up64->msg_rtime); | |
399 | err |= __put_user(m64->msg_ctime, &up64->msg_ctime); | |
400 | err |= __put_user(m64->msg_cbytes, &up64->msg_cbytes); | |
401 | err |= __put_user(m64->msg_qnum, &up64->msg_qnum); | |
402 | err |= __put_user(m64->msg_qbytes, &up64->msg_qbytes); | |
403 | err |= __put_user(m64->msg_lspid, &up64->msg_lspid); | |
404 | err |= __put_user(m64->msg_lrpid, &up64->msg_lrpid); | |
405 | return err; | |
406 | } | |
407 | ||
408 | static inline int put_compat_msqid_ds(struct msqid64_ds *m, | |
409 | struct compat_msqid_ds __user *up) | |
410 | { | |
411 | int err; | |
412 | ||
413 | if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) | |
414 | return -EFAULT; | |
415 | err = __put_compat_ipc_perm(&m->msg_perm, &up->msg_perm); | |
416 | err |= __put_user(m->msg_stime, &up->msg_stime); | |
417 | err |= __put_user(m->msg_rtime, &up->msg_rtime); | |
418 | err |= __put_user(m->msg_ctime, &up->msg_ctime); | |
419 | err |= __put_user(m->msg_cbytes, &up->msg_cbytes); | |
420 | err |= __put_user(m->msg_qnum, &up->msg_qnum); | |
421 | err |= __put_user(m->msg_qbytes, &up->msg_qbytes); | |
422 | err |= __put_user(m->msg_lspid, &up->msg_lspid); | |
423 | err |= __put_user(m->msg_lrpid, &up->msg_lrpid); | |
424 | return err; | |
425 | } | |
426 | ||
427 | long compat_sys_msgctl(int first, int second, void __user *uptr) | |
428 | { | |
429 | int err, err2; | |
430 | struct msqid64_ds m64; | |
431 | int version = compat_ipc_parse_version(&second); | |
432 | void __user *p; | |
433 | ||
434 | switch (second & (~IPC_64)) { | |
435 | case IPC_INFO: | |
436 | case IPC_RMID: | |
437 | case MSG_INFO: | |
438 | err = sys_msgctl(first, second, uptr); | |
439 | break; | |
440 | ||
441 | case IPC_SET: | |
442 | if (version == IPC_64) { | |
443 | err = get_compat_msqid64(&m64, uptr); | |
444 | } else { | |
445 | err = get_compat_msqid(&m64, uptr); | |
446 | } | |
447 | if (err) | |
448 | break; | |
449 | p = compat_alloc_user_space(sizeof(m64)); | |
450 | if (copy_to_user(p, &m64, sizeof(m64))) | |
451 | err = -EFAULT; | |
452 | else | |
453 | err = sys_msgctl(first, second, p); | |
454 | break; | |
455 | ||
456 | case IPC_STAT: | |
457 | case MSG_STAT: | |
458 | p = compat_alloc_user_space(sizeof(m64)); | |
459 | err = sys_msgctl(first, second, p); | |
460 | if (err < 0) | |
461 | break; | |
462 | if (copy_from_user(&m64, p, sizeof(m64))) | |
463 | err2 = -EFAULT; | |
464 | else if (version == IPC_64) | |
465 | err2 = put_compat_msqid64_ds(&m64, uptr); | |
466 | else | |
467 | err2 = put_compat_msqid_ds(&m64, uptr); | |
468 | if (err2) | |
469 | err = -EFAULT; | |
470 | break; | |
471 | ||
472 | default: | |
473 | err = -EINVAL; | |
474 | break; | |
475 | } | |
476 | return err; | |
477 | } | |
478 | ||
479 | long compat_sys_shmat(int first, int second, compat_uptr_t third, int version, | |
480 | void __user *uptr) | |
481 | { | |
482 | int err; | |
483 | unsigned long raddr; | |
484 | compat_ulong_t __user *uaddr; | |
485 | ||
486 | if (version == 1) | |
487 | return -EINVAL; | |
488 | err = do_shmat(first, uptr, second, &raddr); | |
489 | if (err < 0) | |
490 | return err; | |
491 | uaddr = compat_ptr(third); | |
492 | return put_user(raddr, uaddr); | |
493 | } | |
494 | ||
495 | static inline int get_compat_shmid64_ds(struct shmid64_ds *s64, | |
496 | struct compat_shmid64_ds __user *up64) | |
497 | { | |
498 | if (!access_ok(VERIFY_READ, up64, sizeof(*up64))) | |
499 | return -EFAULT; | |
500 | return __get_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm); | |
501 | } | |
502 | ||
503 | static inline int get_compat_shmid_ds(struct shmid64_ds *s, | |
504 | struct compat_shmid_ds __user *up) | |
505 | { | |
506 | if (!access_ok(VERIFY_READ, up, sizeof(*up))) | |
507 | return -EFAULT; | |
508 | return __get_compat_ipc_perm(&s->shm_perm, &up->shm_perm); | |
509 | } | |
510 | ||
511 | static inline int put_compat_shmid64_ds(struct shmid64_ds *s64, | |
512 | struct compat_shmid64_ds __user *up64) | |
513 | { | |
514 | int err; | |
515 | ||
516 | if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) | |
517 | return -EFAULT; | |
518 | err = __put_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm); | |
519 | err |= __put_user(s64->shm_atime, &up64->shm_atime); | |
520 | err |= __put_user(s64->shm_dtime, &up64->shm_dtime); | |
521 | err |= __put_user(s64->shm_ctime, &up64->shm_ctime); | |
522 | err |= __put_user(s64->shm_segsz, &up64->shm_segsz); | |
523 | err |= __put_user(s64->shm_nattch, &up64->shm_nattch); | |
524 | err |= __put_user(s64->shm_cpid, &up64->shm_cpid); | |
525 | err |= __put_user(s64->shm_lpid, &up64->shm_lpid); | |
526 | return err; | |
527 | } | |
528 | ||
529 | static inline int put_compat_shmid_ds(struct shmid64_ds *s, | |
530 | struct compat_shmid_ds __user *up) | |
531 | { | |
532 | int err; | |
533 | ||
534 | if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) | |
535 | return -EFAULT; | |
536 | err = __put_compat_ipc_perm(&s->shm_perm, &up->shm_perm); | |
537 | err |= __put_user(s->shm_atime, &up->shm_atime); | |
538 | err |= __put_user(s->shm_dtime, &up->shm_dtime); | |
539 | err |= __put_user(s->shm_ctime, &up->shm_ctime); | |
540 | err |= __put_user(s->shm_segsz, &up->shm_segsz); | |
541 | err |= __put_user(s->shm_nattch, &up->shm_nattch); | |
542 | err |= __put_user(s->shm_cpid, &up->shm_cpid); | |
543 | err |= __put_user(s->shm_lpid, &up->shm_lpid); | |
544 | return err; | |
545 | } | |
546 | ||
547 | static inline int put_compat_shminfo64(struct shminfo64 *smi, | |
548 | struct compat_shminfo64 __user *up64) | |
549 | { | |
550 | int err; | |
551 | ||
552 | if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) | |
553 | return -EFAULT; | |
554 | err = __put_user(smi->shmmax, &up64->shmmax); | |
555 | err |= __put_user(smi->shmmin, &up64->shmmin); | |
556 | err |= __put_user(smi->shmmni, &up64->shmmni); | |
557 | err |= __put_user(smi->shmseg, &up64->shmseg); | |
558 | err |= __put_user(smi->shmall, &up64->shmall); | |
559 | return err; | |
560 | } | |
561 | ||
562 | static inline int put_compat_shminfo(struct shminfo64 *smi, | |
563 | struct shminfo __user *up) | |
564 | { | |
565 | int err; | |
566 | ||
567 | if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) | |
568 | return -EFAULT; | |
569 | err = __put_user(smi->shmmax, &up->shmmax); | |
570 | err |= __put_user(smi->shmmin, &up->shmmin); | |
571 | err |= __put_user(smi->shmmni, &up->shmmni); | |
572 | err |= __put_user(smi->shmseg, &up->shmseg); | |
573 | err |= __put_user(smi->shmall, &up->shmall); | |
214a627c | 574 | return err; |
1da177e4 LT |
575 | } |
576 | ||
577 | static inline int put_compat_shm_info(struct shm_info __user *ip, | |
578 | struct compat_shm_info __user *uip) | |
579 | { | |
580 | int err; | |
581 | struct shm_info si; | |
582 | ||
583 | if (!access_ok(VERIFY_WRITE, uip, sizeof(*uip)) || | |
584 | copy_from_user(&si, ip, sizeof(si))) | |
585 | return -EFAULT; | |
586 | err = __put_user(si.used_ids, &uip->used_ids); | |
587 | err |= __put_user(si.shm_tot, &uip->shm_tot); | |
588 | err |= __put_user(si.shm_rss, &uip->shm_rss); | |
589 | err |= __put_user(si.shm_swp, &uip->shm_swp); | |
590 | err |= __put_user(si.swap_attempts, &uip->swap_attempts); | |
591 | err |= __put_user(si.swap_successes, &uip->swap_successes); | |
592 | return err; | |
593 | } | |
594 | ||
595 | long compat_sys_shmctl(int first, int second, void __user *uptr) | |
596 | { | |
597 | void __user *p; | |
598 | struct shmid64_ds s64; | |
599 | struct shminfo64 smi; | |
600 | int err, err2; | |
601 | int version = compat_ipc_parse_version(&second); | |
602 | ||
603 | switch (second & (~IPC_64)) { | |
604 | case IPC_RMID: | |
605 | case SHM_LOCK: | |
606 | case SHM_UNLOCK: | |
607 | err = sys_shmctl(first, second, uptr); | |
608 | break; | |
609 | ||
610 | case IPC_INFO: | |
611 | p = compat_alloc_user_space(sizeof(smi)); | |
612 | err = sys_shmctl(first, second, p); | |
613 | if (err < 0) | |
614 | break; | |
615 | if (copy_from_user(&smi, p, sizeof(smi))) | |
616 | err2 = -EFAULT; | |
617 | else if (version == IPC_64) | |
618 | err2 = put_compat_shminfo64(&smi, uptr); | |
619 | else | |
620 | err2 = put_compat_shminfo(&smi, uptr); | |
621 | if (err2) | |
622 | err = -EFAULT; | |
623 | break; | |
624 | ||
625 | ||
626 | case IPC_SET: | |
627 | if (version == IPC_64) { | |
628 | err = get_compat_shmid64_ds(&s64, uptr); | |
629 | } else { | |
630 | err = get_compat_shmid_ds(&s64, uptr); | |
631 | } | |
632 | if (err) | |
633 | break; | |
634 | p = compat_alloc_user_space(sizeof(s64)); | |
635 | if (copy_to_user(p, &s64, sizeof(s64))) | |
636 | err = -EFAULT; | |
637 | else | |
638 | err = sys_shmctl(first, second, p); | |
639 | break; | |
640 | ||
641 | case IPC_STAT: | |
642 | case SHM_STAT: | |
643 | p = compat_alloc_user_space(sizeof(s64)); | |
644 | err = sys_shmctl(first, second, p); | |
645 | if (err < 0) | |
646 | break; | |
647 | if (copy_from_user(&s64, p, sizeof(s64))) | |
648 | err2 = -EFAULT; | |
649 | else if (version == IPC_64) | |
650 | err2 = put_compat_shmid64_ds(&s64, uptr); | |
651 | else | |
652 | err2 = put_compat_shmid_ds(&s64, uptr); | |
653 | if (err2) | |
654 | err = -EFAULT; | |
655 | break; | |
656 | ||
657 | case SHM_INFO: | |
658 | p = compat_alloc_user_space(sizeof(struct shm_info)); | |
659 | err = sys_shmctl(first, second, p); | |
660 | if (err < 0) | |
661 | break; | |
662 | err2 = put_compat_shm_info(p, uptr); | |
663 | if (err2) | |
664 | err = -EFAULT; | |
665 | break; | |
666 | ||
667 | default: | |
668 | err = -EINVAL; | |
669 | break; | |
670 | } | |
671 | return err; | |
672 | } | |
673 | ||
674 | long compat_sys_semtimedop(int semid, struct sembuf __user *tsems, | |
675 | unsigned nsops, const struct compat_timespec __user *timeout) | |
676 | { | |
677 | struct timespec __user *ts64 = NULL; | |
678 | if (timeout) { | |
679 | struct timespec ts; | |
680 | ts64 = compat_alloc_user_space(sizeof(*ts64)); | |
681 | if (get_compat_timespec(&ts, timeout)) | |
682 | return -EFAULT; | |
683 | if (copy_to_user(ts64, &ts, sizeof(ts))) | |
684 | return -EFAULT; | |
685 | } | |
686 | return sys_semtimedop(semid, tsems, nsops, ts64); | |
687 | } |