compat.c revision 3a665531
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_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
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
309long 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
324long 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
335long 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
351long 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
372long compat_sys_semctl(int semid, int semnum, int cmd, int arg)
373{
374	return do_compat_semctl(semid, semnum, cmd, arg);
375}
376
377long 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
387long 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
395static 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
407static 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
419static 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
438static 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
457long 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
516long 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
532long 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
545static 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
553static 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
561static 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
579static 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
597static 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
614static 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
631static 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
649long 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
730long 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