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}