compat.c revision 5d70a596
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	unsigned long 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#ifdef __BIG_ENDIAN
253		fourth = (unsigned long)pad << 32;
254#else
255		fourth = pad;
256#endif
257	else
258		fourth = (unsigned long)compat_ptr(pad);
259	switch (third & (~IPC_64)) {
260	case IPC_INFO:
261	case IPC_RMID:
262	case SEM_INFO:
263	case GETVAL:
264	case GETPID:
265	case GETNCNT:
266	case GETZCNT:
267	case GETALL:
268	case SETVAL:
269	case SETALL:
270		err = sys_semctl(first, second, third, fourth);
271		break;
272
273	case IPC_STAT:
274	case SEM_STAT:
275		up64 = compat_alloc_user_space(sizeof(s64));
276		fourth = (unsigned long)up64;
277		err = sys_semctl(first, second, third, fourth);
278		if (err < 0)
279			break;
280		if (copy_from_user(&s64, up64, sizeof(s64)))
281			err2 = -EFAULT;
282		else if (version == IPC_64)
283			err2 = put_compat_semid64_ds(&s64, compat_ptr(pad));
284		else
285			err2 = put_compat_semid_ds(&s64, compat_ptr(pad));
286		if (err2)
287			err = -EFAULT;
288		break;
289
290	case IPC_SET:
291		if (version == IPC_64)
292			err = get_compat_semid64_ds(&s64, compat_ptr(pad));
293		else
294			err = get_compat_semid_ds(&s64, compat_ptr(pad));
295
296		up64 = compat_alloc_user_space(sizeof(s64));
297		if (copy_to_user(up64, &s64, sizeof(s64)))
298			err = -EFAULT;
299		if (err)
300			break;
301
302		fourth = (unsigned long)up64;
303		err = sys_semctl(first, second, third, fourth);
304		break;
305
306	default:
307		err = -EINVAL;
308		break;
309	}
310	return err;
311}
312
313static long compat_do_msg_fill(void __user *dest, struct msg_msg *msg, size_t bufsz)
314{
315	struct compat_msgbuf __user *msgp = dest;
316	size_t msgsz;
317
318	if (put_user(msg->m_type, &msgp->mtype))
319		return -EFAULT;
320
321	msgsz = (bufsz > msg->m_ts) ? msg->m_ts : bufsz;
322	if (store_msg(msgp->mtext, msg, msgsz))
323		return -EFAULT;
324	return msgsz;
325}
326
327#ifndef COMPAT_SHMLBA
328#define COMPAT_SHMLBA	SHMLBA
329#endif
330
331#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
332COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
333	u32, third, compat_uptr_t, ptr, u32, fifth)
334{
335	int version;
336	u32 pad;
337
338	version = call >> 16; /* hack for backward compatibility */
339	call &= 0xffff;
340
341	switch (call) {
342	case SEMOP:
343		/* struct sembuf is the same on 32 and 64bit :)) */
344		return sys_semtimedop(first, compat_ptr(ptr), second, NULL);
345	case SEMTIMEDOP:
346		return compat_sys_semtimedop(first, compat_ptr(ptr), second,
347						compat_ptr(fifth));
348	case SEMGET:
349		return sys_semget(first, second, third);
350	case SEMCTL:
351		if (!ptr)
352			return -EINVAL;
353		if (get_user(pad, (u32 __user *) compat_ptr(ptr)))
354			return -EFAULT;
355		return do_compat_semctl(first, second, third, pad);
356
357	case MSGSND: {
358		struct compat_msgbuf __user *up = compat_ptr(ptr);
359		compat_long_t type;
360
361		if (first < 0 || second < 0)
362			return -EINVAL;
363
364		if (get_user(type, &up->mtype))
365			return -EFAULT;
366
367		return do_msgsnd(first, type, up->mtext, second, third);
368	}
369	case MSGRCV: {
370		void __user *uptr = compat_ptr(ptr);
371
372		if (first < 0 || second < 0)
373			return -EINVAL;
374
375		if (!version) {
376			struct compat_ipc_kludge ipck;
377			if (!uptr)
378				return -EINVAL;
379			if (copy_from_user(&ipck, uptr, sizeof(ipck)))
380				return -EFAULT;
381			uptr = compat_ptr(ipck.msgp);
382			fifth = ipck.msgtyp;
383		}
384		return do_msgrcv(first, uptr, second, (s32)fifth, third,
385				 compat_do_msg_fill);
386	}
387	case MSGGET:
388		return sys_msgget(first, second);
389	case MSGCTL:
390		return compat_sys_msgctl(first, second, compat_ptr(ptr));
391
392	case SHMAT: {
393		int err;
394		unsigned long raddr;
395
396		if (version == 1)
397			return -EINVAL;
398		err = do_shmat(first, compat_ptr(ptr), second, &raddr,
399			       COMPAT_SHMLBA);
400		if (err < 0)
401			return err;
402		return put_user(raddr, (compat_ulong_t *)compat_ptr(third));
403	}
404	case SHMDT:
405		return sys_shmdt(compat_ptr(ptr));
406	case SHMGET:
407		return sys_shmget(first, (unsigned)second, third);
408	case SHMCTL:
409		return compat_sys_shmctl(first, second, compat_ptr(ptr));
410	}
411
412	return -ENOSYS;
413}
414#endif
415
416COMPAT_SYSCALL_DEFINE4(semctl, int, semid, int, semnum, int, cmd, int, arg)
417{
418	return do_compat_semctl(semid, semnum, cmd, arg);
419}
420
421COMPAT_SYSCALL_DEFINE4(msgsnd, int, msqid, compat_uptr_t, msgp,
422		       compat_ssize_t, msgsz, int, msgflg)
423{
424	struct compat_msgbuf __user *up = compat_ptr(msgp);
425	compat_long_t mtype;
426
427	if (get_user(mtype, &up->mtype))
428		return -EFAULT;
429	return do_msgsnd(msqid, mtype, up->mtext, (ssize_t)msgsz, msgflg);
430}
431
432COMPAT_SYSCALL_DEFINE5(msgrcv, int, msqid, compat_uptr_t, msgp,
433		       compat_ssize_t, msgsz, compat_long_t, msgtyp, int, msgflg)
434{
435	return do_msgrcv(msqid, compat_ptr(msgp), (ssize_t)msgsz, (long)msgtyp,
436			 msgflg, compat_do_msg_fill);
437}
438
439static inline int get_compat_msqid64(struct msqid64_ds *m64,
440				     struct compat_msqid64_ds __user *up64)
441{
442	int err;
443
444	if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
445		return -EFAULT;
446	err  = __get_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
447	err |= __get_user(m64->msg_qbytes, &up64->msg_qbytes);
448	return err;
449}
450
451static inline int get_compat_msqid(struct msqid64_ds *m,
452				   struct compat_msqid_ds __user *up)
453{
454	int err;
455
456	if (!access_ok(VERIFY_READ, up, sizeof(*up)))
457		return -EFAULT;
458	err  = __get_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
459	err |= __get_user(m->msg_qbytes, &up->msg_qbytes);
460	return err;
461}
462
463static inline int put_compat_msqid64_ds(struct msqid64_ds *m64,
464				 struct compat_msqid64_ds __user *up64)
465{
466	int err;
467
468	if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
469		return -EFAULT;
470	err  = __put_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
471	err |= __put_user(m64->msg_stime, &up64->msg_stime);
472	err |= __put_user(m64->msg_rtime, &up64->msg_rtime);
473	err |= __put_user(m64->msg_ctime, &up64->msg_ctime);
474	err |= __put_user(m64->msg_cbytes, &up64->msg_cbytes);
475	err |= __put_user(m64->msg_qnum, &up64->msg_qnum);
476	err |= __put_user(m64->msg_qbytes, &up64->msg_qbytes);
477	err |= __put_user(m64->msg_lspid, &up64->msg_lspid);
478	err |= __put_user(m64->msg_lrpid, &up64->msg_lrpid);
479	return err;
480}
481
482static inline int put_compat_msqid_ds(struct msqid64_ds *m,
483				      struct compat_msqid_ds __user *up)
484{
485	int err;
486
487	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
488		return -EFAULT;
489	err  = __put_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
490	err |= __put_user(m->msg_stime, &up->msg_stime);
491	err |= __put_user(m->msg_rtime, &up->msg_rtime);
492	err |= __put_user(m->msg_ctime, &up->msg_ctime);
493	err |= __put_user(m->msg_cbytes, &up->msg_cbytes);
494	err |= __put_user(m->msg_qnum, &up->msg_qnum);
495	err |= __put_user(m->msg_qbytes, &up->msg_qbytes);
496	err |= __put_user(m->msg_lspid, &up->msg_lspid);
497	err |= __put_user(m->msg_lrpid, &up->msg_lrpid);
498	return err;
499}
500
501COMPAT_SYSCALL_DEFINE3(msgctl, int, first, int, second, void __user *, uptr)
502{
503	int err, err2;
504	struct msqid64_ds m64;
505	int version = compat_ipc_parse_version(&second);
506	void __user *p;
507
508	memset(&m64, 0, sizeof(m64));
509
510	switch (second & (~IPC_64)) {
511	case IPC_INFO:
512	case IPC_RMID:
513	case MSG_INFO:
514		err = sys_msgctl(first, second, uptr);
515		break;
516
517	case IPC_SET:
518		if (version == IPC_64)
519			err = get_compat_msqid64(&m64, uptr);
520		else
521			err = get_compat_msqid(&m64, uptr);
522
523		if (err)
524			break;
525		p = compat_alloc_user_space(sizeof(m64));
526		if (copy_to_user(p, &m64, sizeof(m64)))
527			err = -EFAULT;
528		else
529			err = sys_msgctl(first, second, p);
530		break;
531
532	case IPC_STAT:
533	case MSG_STAT:
534		p = compat_alloc_user_space(sizeof(m64));
535		err = sys_msgctl(first, second, p);
536		if (err < 0)
537			break;
538		if (copy_from_user(&m64, p, sizeof(m64)))
539			err2 = -EFAULT;
540		else if (version == IPC_64)
541			err2 = put_compat_msqid64_ds(&m64, uptr);
542		else
543			err2 = put_compat_msqid_ds(&m64, uptr);
544		if (err2)
545			err = -EFAULT;
546		break;
547
548	default:
549		err = -EINVAL;
550		break;
551	}
552	return err;
553}
554
555COMPAT_SYSCALL_DEFINE3(shmat, int, shmid, compat_uptr_t, shmaddr, int, shmflg)
556{
557	unsigned long ret;
558	long err;
559
560	err = do_shmat(shmid, compat_ptr(shmaddr), shmflg, &ret, COMPAT_SHMLBA);
561	if (err)
562		return err;
563	force_successful_syscall_return();
564	return (long)ret;
565}
566
567static inline int get_compat_shmid64_ds(struct shmid64_ds *s64,
568					struct compat_shmid64_ds __user *up64)
569{
570	if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
571		return -EFAULT;
572	return __get_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
573}
574
575static inline int get_compat_shmid_ds(struct shmid64_ds *s,
576				      struct compat_shmid_ds __user *up)
577{
578	if (!access_ok(VERIFY_READ, up, sizeof(*up)))
579		return -EFAULT;
580	return __get_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
581}
582
583static inline int put_compat_shmid64_ds(struct shmid64_ds *s64,
584					struct compat_shmid64_ds __user *up64)
585{
586	int err;
587
588	if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
589		return -EFAULT;
590	err  = __put_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
591	err |= __put_user(s64->shm_atime, &up64->shm_atime);
592	err |= __put_user(s64->shm_dtime, &up64->shm_dtime);
593	err |= __put_user(s64->shm_ctime, &up64->shm_ctime);
594	err |= __put_user(s64->shm_segsz, &up64->shm_segsz);
595	err |= __put_user(s64->shm_nattch, &up64->shm_nattch);
596	err |= __put_user(s64->shm_cpid, &up64->shm_cpid);
597	err |= __put_user(s64->shm_lpid, &up64->shm_lpid);
598	return err;
599}
600
601static inline int put_compat_shmid_ds(struct shmid64_ds *s,
602				      struct compat_shmid_ds __user *up)
603{
604	int err;
605
606	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
607		return -EFAULT;
608	err  = __put_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
609	err |= __put_user(s->shm_atime, &up->shm_atime);
610	err |= __put_user(s->shm_dtime, &up->shm_dtime);
611	err |= __put_user(s->shm_ctime, &up->shm_ctime);
612	err |= __put_user(s->shm_segsz, &up->shm_segsz);
613	err |= __put_user(s->shm_nattch, &up->shm_nattch);
614	err |= __put_user(s->shm_cpid, &up->shm_cpid);
615	err |= __put_user(s->shm_lpid, &up->shm_lpid);
616	return err;
617}
618
619static inline int put_compat_shminfo64(struct shminfo64 *smi,
620				       struct compat_shminfo64 __user *up64)
621{
622	int err;
623
624	if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
625		return -EFAULT;
626	if (smi->shmmax > INT_MAX)
627		smi->shmmax = INT_MAX;
628	err  = __put_user(smi->shmmax, &up64->shmmax);
629	err |= __put_user(smi->shmmin, &up64->shmmin);
630	err |= __put_user(smi->shmmni, &up64->shmmni);
631	err |= __put_user(smi->shmseg, &up64->shmseg);
632	err |= __put_user(smi->shmall, &up64->shmall);
633	return err;
634}
635
636static inline int put_compat_shminfo(struct shminfo64 *smi,
637				     struct shminfo __user *up)
638{
639	int err;
640
641	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
642		return -EFAULT;
643	if (smi->shmmax > INT_MAX)
644		smi->shmmax = INT_MAX;
645	err  = __put_user(smi->shmmax, &up->shmmax);
646	err |= __put_user(smi->shmmin, &up->shmmin);
647	err |= __put_user(smi->shmmni, &up->shmmni);
648	err |= __put_user(smi->shmseg, &up->shmseg);
649	err |= __put_user(smi->shmall, &up->shmall);
650	return err;
651}
652
653static inline int put_compat_shm_info(struct shm_info __user *ip,
654				      struct compat_shm_info __user *uip)
655{
656	int err;
657	struct shm_info si;
658
659	if (!access_ok(VERIFY_WRITE, uip, sizeof(*uip)) ||
660	    copy_from_user(&si, ip, sizeof(si)))
661		return -EFAULT;
662	err  = __put_user(si.used_ids, &uip->used_ids);
663	err |= __put_user(si.shm_tot, &uip->shm_tot);
664	err |= __put_user(si.shm_rss, &uip->shm_rss);
665	err |= __put_user(si.shm_swp, &uip->shm_swp);
666	err |= __put_user(si.swap_attempts, &uip->swap_attempts);
667	err |= __put_user(si.swap_successes, &uip->swap_successes);
668	return err;
669}
670
671COMPAT_SYSCALL_DEFINE3(shmctl, int, first, int, second, void __user *, uptr)
672{
673	void __user *p;
674	struct shmid64_ds s64;
675	struct shminfo64 smi;
676	int err, err2;
677	int version = compat_ipc_parse_version(&second);
678
679	memset(&s64, 0, sizeof(s64));
680
681	switch (second & (~IPC_64)) {
682	case IPC_RMID:
683	case SHM_LOCK:
684	case SHM_UNLOCK:
685		err = sys_shmctl(first, second, uptr);
686		break;
687
688	case IPC_INFO:
689		p = compat_alloc_user_space(sizeof(smi));
690		err = sys_shmctl(first, second, p);
691		if (err < 0)
692			break;
693		if (copy_from_user(&smi, p, sizeof(smi)))
694			err2 = -EFAULT;
695		else if (version == IPC_64)
696			err2 = put_compat_shminfo64(&smi, uptr);
697		else
698			err2 = put_compat_shminfo(&smi, uptr);
699		if (err2)
700			err = -EFAULT;
701		break;
702
703
704	case IPC_SET:
705		if (version == IPC_64)
706			err = get_compat_shmid64_ds(&s64, uptr);
707		else
708			err = get_compat_shmid_ds(&s64, uptr);
709
710		if (err)
711			break;
712		p = compat_alloc_user_space(sizeof(s64));
713		if (copy_to_user(p, &s64, sizeof(s64)))
714			err = -EFAULT;
715		else
716			err = sys_shmctl(first, second, p);
717		break;
718
719	case IPC_STAT:
720	case SHM_STAT:
721		p = compat_alloc_user_space(sizeof(s64));
722		err = sys_shmctl(first, second, p);
723		if (err < 0)
724			break;
725		if (copy_from_user(&s64, p, sizeof(s64)))
726			err2 = -EFAULT;
727		else if (version == IPC_64)
728			err2 = put_compat_shmid64_ds(&s64, uptr);
729		else
730			err2 = put_compat_shmid_ds(&s64, uptr);
731		if (err2)
732			err = -EFAULT;
733		break;
734
735	case SHM_INFO:
736		p = compat_alloc_user_space(sizeof(struct shm_info));
737		err = sys_shmctl(first, second, p);
738		if (err < 0)
739			break;
740		err2 = put_compat_shm_info(p, uptr);
741		if (err2)
742			err = -EFAULT;
743		break;
744
745	default:
746		err = -EINVAL;
747		break;
748	}
749	return err;
750}
751
752COMPAT_SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsems,
753		       unsigned, nsops,
754		       const struct compat_timespec __user *, timeout)
755{
756	struct timespec __user *ts64 = NULL;
757	if (timeout) {
758		struct timespec ts;
759		ts64 = compat_alloc_user_space(sizeof(*ts64));
760		if (get_compat_timespec(&ts, timeout))
761			return -EFAULT;
762		if (copy_to_user(ts64, &ts, sizeof(ts)))
763			return -EFAULT;
764	}
765	return sys_semtimedop(semid, tsems, nsops, ts64);
766}
767