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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * 32bit Socket syscall emulation. Based on arch/sparc64/kernel/sys_sparc32.c.
4 *
5 * Copyright (C) 2000 VA Linux Co
6 * Copyright (C) 2000 Don Dugger <n0ano@valinux.com>
7 * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com>
8 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
9 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
10 * Copyright (C) 2000 Hewlett-Packard Co.
11 * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com>
12 * Copyright (C) 2000,2001 Andi Kleen, SuSE Labs
13 */
14
15#include <linux/kernel.h>
16#include <linux/gfp.h>
17#include <linux/fs.h>
18#include <linux/types.h>
19#include <linux/file.h>
20#include <linux/icmpv6.h>
21#include <linux/socket.h>
22#include <linux/syscalls.h>
23#include <linux/filter.h>
24#include <linux/compat.h>
25#include <linux/security.h>
26#include <linux/audit.h>
27#include <linux/export.h>
28
29#include <net/scm.h>
30#include <net/sock.h>
31#include <net/ip.h>
32#include <net/ipv6.h>
33#include <linux/uaccess.h>
34#include <net/compat.h>
35
36int __get_compat_msghdr(struct msghdr *kmsg,
37 struct compat_msghdr *msg,
38 struct sockaddr __user **save_addr)
39{
40 ssize_t err;
41
42 kmsg->msg_flags = msg->msg_flags;
43 kmsg->msg_namelen = msg->msg_namelen;
44
45 if (!msg->msg_name)
46 kmsg->msg_namelen = 0;
47
48 if (kmsg->msg_namelen < 0)
49 return -EINVAL;
50
51 if (kmsg->msg_namelen > sizeof(struct sockaddr_storage))
52 kmsg->msg_namelen = sizeof(struct sockaddr_storage);
53
54 kmsg->msg_control_is_user = true;
55 kmsg->msg_get_inq = 0;
56 kmsg->msg_control_user = compat_ptr(msg->msg_control);
57 kmsg->msg_controllen = msg->msg_controllen;
58
59 if (save_addr)
60 *save_addr = compat_ptr(msg->msg_name);
61
62 if (msg->msg_name && kmsg->msg_namelen) {
63 if (!save_addr) {
64 err = move_addr_to_kernel(compat_ptr(msg->msg_name),
65 kmsg->msg_namelen,
66 kmsg->msg_name);
67 if (err < 0)
68 return err;
69 }
70 } else {
71 kmsg->msg_name = NULL;
72 kmsg->msg_namelen = 0;
73 }
74
75 if (msg->msg_iovlen > UIO_MAXIOV)
76 return -EMSGSIZE;
77
78 kmsg->msg_iocb = NULL;
79 kmsg->msg_ubuf = NULL;
80 return 0;
81}
82
83int get_compat_msghdr(struct msghdr *kmsg,
84 struct compat_msghdr __user *umsg,
85 struct sockaddr __user **save_addr,
86 struct iovec **iov)
87{
88 struct compat_msghdr msg;
89 ssize_t err;
90
91 if (copy_from_user(&msg, umsg, sizeof(*umsg)))
92 return -EFAULT;
93
94 err = __get_compat_msghdr(kmsg, &msg, save_addr);
95 if (err)
96 return err;
97
98 err = import_iovec(save_addr ? ITER_DEST : ITER_SOURCE,
99 compat_ptr(msg.msg_iov), msg.msg_iovlen,
100 UIO_FASTIOV, iov, &kmsg->msg_iter);
101 return err < 0 ? err : 0;
102}
103
104/* Bleech... */
105#define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32))
106
107#define CMSG_COMPAT_DATA(cmsg) \
108 ((void __user *)((char __user *)(cmsg) + sizeof(struct compat_cmsghdr)))
109#define CMSG_COMPAT_SPACE(len) \
110 (sizeof(struct compat_cmsghdr) + CMSG_COMPAT_ALIGN(len))
111#define CMSG_COMPAT_LEN(len) \
112 (sizeof(struct compat_cmsghdr) + (len))
113
114#define CMSG_COMPAT_FIRSTHDR(msg) \
115 (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \
116 (struct compat_cmsghdr __user *)((msg)->msg_control_user) : \
117 (struct compat_cmsghdr __user *)NULL)
118
119#define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \
120 ((ucmlen) >= sizeof(struct compat_cmsghdr) && \
121 (ucmlen) <= (unsigned long) \
122 ((mhdr)->msg_controllen - \
123 ((char __user *)(ucmsg) - (char __user *)(mhdr)->msg_control_user)))
124
125static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg,
126 struct compat_cmsghdr __user *cmsg, int cmsg_len)
127{
128 char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len);
129 if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control_user) >
130 msg->msg_controllen)
131 return NULL;
132 return (struct compat_cmsghdr __user *)ptr;
133}
134
135/* There is a lot of hair here because the alignment rules (and
136 * thus placement) of cmsg headers and length are different for
137 * 32-bit apps. -DaveM
138 */
139int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk,
140 unsigned char *stackbuf, int stackbuf_size)
141{
142 struct compat_cmsghdr __user *ucmsg;
143 struct cmsghdr *kcmsg, *kcmsg_base;
144 compat_size_t ucmlen;
145 __kernel_size_t kcmlen, tmp;
146 int err = -EFAULT;
147
148 BUILD_BUG_ON(sizeof(struct compat_cmsghdr) !=
149 CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)));
150
151 kcmlen = 0;
152 kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf;
153 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
154 while (ucmsg != NULL) {
155 if (get_user(ucmlen, &ucmsg->cmsg_len))
156 return -EFAULT;
157
158 /* Catch bogons. */
159 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
160 return -EINVAL;
161
162 tmp = ((ucmlen - sizeof(*ucmsg)) + sizeof(struct cmsghdr));
163 tmp = CMSG_ALIGN(tmp);
164 kcmlen += tmp;
165 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
166 }
167 if (kcmlen == 0)
168 return -EINVAL;
169
170 /* The kcmlen holds the 64-bit version of the control length.
171 * It may not be modified as we do not stick it into the kmsg
172 * until we have successfully copied over all of the data
173 * from the user.
174 */
175 if (kcmlen > stackbuf_size)
176 kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL);
177 if (kcmsg == NULL)
178 return -ENOMEM;
179
180 /* Now copy them over neatly. */
181 memset(kcmsg, 0, kcmlen);
182 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
183 while (ucmsg != NULL) {
184 struct compat_cmsghdr cmsg;
185 if (copy_from_user(&cmsg, ucmsg, sizeof(cmsg)))
186 goto Efault;
187 if (!CMSG_COMPAT_OK(cmsg.cmsg_len, ucmsg, kmsg))
188 goto Einval;
189 tmp = ((cmsg.cmsg_len - sizeof(*ucmsg)) + sizeof(struct cmsghdr));
190 if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp))
191 goto Einval;
192 kcmsg->cmsg_len = tmp;
193 kcmsg->cmsg_level = cmsg.cmsg_level;
194 kcmsg->cmsg_type = cmsg.cmsg_type;
195 tmp = CMSG_ALIGN(tmp);
196 if (copy_from_user(CMSG_DATA(kcmsg),
197 CMSG_COMPAT_DATA(ucmsg),
198 (cmsg.cmsg_len - sizeof(*ucmsg))))
199 goto Efault;
200
201 /* Advance. */
202 kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp);
203 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, cmsg.cmsg_len);
204 }
205
206 /*
207 * check the length of messages copied in is the same as the
208 * what we get from the first loop
209 */
210 if ((char *)kcmsg - (char *)kcmsg_base != kcmlen)
211 goto Einval;
212
213 /* Ok, looks like we made it. Hook it up and return success. */
214 kmsg->msg_control_is_user = false;
215 kmsg->msg_control = kcmsg_base;
216 kmsg->msg_controllen = kcmlen;
217 return 0;
218
219Einval:
220 err = -EINVAL;
221Efault:
222 if (kcmsg_base != (struct cmsghdr *)stackbuf)
223 sock_kfree_s(sk, kcmsg_base, kcmlen);
224 return err;
225}
226
227int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data)
228{
229 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control_user;
230 struct compat_cmsghdr cmhdr;
231 struct old_timeval32 ctv;
232 struct old_timespec32 cts[3];
233 int cmlen;
234
235 if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) {
236 kmsg->msg_flags |= MSG_CTRUNC;
237 return 0; /* XXX: return error? check spec. */
238 }
239
240 if (!COMPAT_USE_64BIT_TIME) {
241 if (level == SOL_SOCKET && type == SO_TIMESTAMP_OLD) {
242 struct __kernel_old_timeval *tv = (struct __kernel_old_timeval *)data;
243 ctv.tv_sec = tv->tv_sec;
244 ctv.tv_usec = tv->tv_usec;
245 data = &ctv;
246 len = sizeof(ctv);
247 }
248 if (level == SOL_SOCKET &&
249 (type == SO_TIMESTAMPNS_OLD || type == SO_TIMESTAMPING_OLD)) {
250 int count = type == SO_TIMESTAMPNS_OLD ? 1 : 3;
251 int i;
252 struct __kernel_old_timespec *ts = data;
253 for (i = 0; i < count; i++) {
254 cts[i].tv_sec = ts[i].tv_sec;
255 cts[i].tv_nsec = ts[i].tv_nsec;
256 }
257 data = &cts;
258 len = sizeof(cts[0]) * count;
259 }
260 }
261
262 cmlen = CMSG_COMPAT_LEN(len);
263 if (kmsg->msg_controllen < cmlen) {
264 kmsg->msg_flags |= MSG_CTRUNC;
265 cmlen = kmsg->msg_controllen;
266 }
267 cmhdr.cmsg_level = level;
268 cmhdr.cmsg_type = type;
269 cmhdr.cmsg_len = cmlen;
270
271 if (copy_to_user(cm, &cmhdr, sizeof cmhdr))
272 return -EFAULT;
273 if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr)))
274 return -EFAULT;
275 cmlen = CMSG_COMPAT_SPACE(len);
276 if (kmsg->msg_controllen < cmlen)
277 cmlen = kmsg->msg_controllen;
278 kmsg->msg_control_user += cmlen;
279 kmsg->msg_controllen -= cmlen;
280 return 0;
281}
282
283static int scm_max_fds_compat(struct msghdr *msg)
284{
285 if (msg->msg_controllen <= sizeof(struct compat_cmsghdr))
286 return 0;
287 return (msg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int);
288}
289
290void scm_detach_fds_compat(struct msghdr *msg, struct scm_cookie *scm)
291{
292 struct compat_cmsghdr __user *cm =
293 (struct compat_cmsghdr __user *)msg->msg_control_user;
294 unsigned int o_flags = (msg->msg_flags & MSG_CMSG_CLOEXEC) ? O_CLOEXEC : 0;
295 int fdmax = min_t(int, scm_max_fds_compat(msg), scm->fp->count);
296 int __user *cmsg_data = CMSG_COMPAT_DATA(cm);
297 int err = 0, i;
298
299 for (i = 0; i < fdmax; i++) {
300 err = scm_recv_one_fd(scm->fp->fp[i], cmsg_data + i, o_flags);
301 if (err < 0)
302 break;
303 }
304
305 if (i > 0) {
306 int cmlen = CMSG_COMPAT_LEN(i * sizeof(int));
307
308 err = put_user(SOL_SOCKET, &cm->cmsg_level);
309 if (!err)
310 err = put_user(SCM_RIGHTS, &cm->cmsg_type);
311 if (!err)
312 err = put_user(cmlen, &cm->cmsg_len);
313 if (!err) {
314 cmlen = CMSG_COMPAT_SPACE(i * sizeof(int));
315 if (msg->msg_controllen < cmlen)
316 cmlen = msg->msg_controllen;
317 msg->msg_control_user += cmlen;
318 msg->msg_controllen -= cmlen;
319 }
320 }
321
322 if (i < scm->fp->count || (scm->fp->count && fdmax <= 0))
323 msg->msg_flags |= MSG_CTRUNC;
324
325 /*
326 * All of the files that fit in the message have had their usage counts
327 * incremented, so we just free the list.
328 */
329 __scm_destroy(scm);
330}
331
332/* Argument list sizes for compat_sys_socketcall */
333#define AL(x) ((x) * sizeof(u32))
334static unsigned char nas[21] = {
335 AL(0), AL(3), AL(3), AL(3), AL(2), AL(3),
336 AL(3), AL(3), AL(4), AL(4), AL(4), AL(6),
337 AL(6), AL(2), AL(5), AL(5), AL(3), AL(3),
338 AL(4), AL(5), AL(4)
339};
340#undef AL
341
342static inline long __compat_sys_sendmsg(int fd,
343 struct compat_msghdr __user *msg,
344 unsigned int flags)
345{
346 return __sys_sendmsg(fd, (struct user_msghdr __user *)msg,
347 flags | MSG_CMSG_COMPAT, false);
348}
349
350COMPAT_SYSCALL_DEFINE3(sendmsg, int, fd, struct compat_msghdr __user *, msg,
351 unsigned int, flags)
352{
353 return __compat_sys_sendmsg(fd, msg, flags);
354}
355
356static inline long __compat_sys_sendmmsg(int fd,
357 struct compat_mmsghdr __user *mmsg,
358 unsigned int vlen, unsigned int flags)
359{
360 return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
361 flags | MSG_CMSG_COMPAT, false);
362}
363
364COMPAT_SYSCALL_DEFINE4(sendmmsg, int, fd, struct compat_mmsghdr __user *, mmsg,
365 unsigned int, vlen, unsigned int, flags)
366{
367 return __compat_sys_sendmmsg(fd, mmsg, vlen, flags);
368}
369
370static inline long __compat_sys_recvmsg(int fd,
371 struct compat_msghdr __user *msg,
372 unsigned int flags)
373{
374 return __sys_recvmsg(fd, (struct user_msghdr __user *)msg,
375 flags | MSG_CMSG_COMPAT, false);
376}
377
378COMPAT_SYSCALL_DEFINE3(recvmsg, int, fd, struct compat_msghdr __user *, msg,
379 unsigned int, flags)
380{
381 return __compat_sys_recvmsg(fd, msg, flags);
382}
383
384static inline long __compat_sys_recvfrom(int fd, void __user *buf,
385 compat_size_t len, unsigned int flags,
386 struct sockaddr __user *addr,
387 int __user *addrlen)
388{
389 return __sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr,
390 addrlen);
391}
392
393COMPAT_SYSCALL_DEFINE4(recv, int, fd, void __user *, buf, compat_size_t, len, unsigned int, flags)
394{
395 return __compat_sys_recvfrom(fd, buf, len, flags, NULL, NULL);
396}
397
398COMPAT_SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, buf, compat_size_t, len,
399 unsigned int, flags, struct sockaddr __user *, addr,
400 int __user *, addrlen)
401{
402 return __compat_sys_recvfrom(fd, buf, len, flags, addr, addrlen);
403}
404
405COMPAT_SYSCALL_DEFINE5(recvmmsg_time64, int, fd, struct compat_mmsghdr __user *, mmsg,
406 unsigned int, vlen, unsigned int, flags,
407 struct __kernel_timespec __user *, timeout)
408{
409 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
410 flags | MSG_CMSG_COMPAT, timeout, NULL);
411}
412
413#ifdef CONFIG_COMPAT_32BIT_TIME
414COMPAT_SYSCALL_DEFINE5(recvmmsg_time32, int, fd, struct compat_mmsghdr __user *, mmsg,
415 unsigned int, vlen, unsigned int, flags,
416 struct old_timespec32 __user *, timeout)
417{
418 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
419 flags | MSG_CMSG_COMPAT, NULL, timeout);
420}
421#endif
422
423COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user *, args)
424{
425 u32 a[AUDITSC_ARGS];
426 unsigned int len;
427 u32 a0, a1;
428 int ret;
429
430 if (call < SYS_SOCKET || call > SYS_SENDMMSG)
431 return -EINVAL;
432 len = nas[call];
433 if (len > sizeof(a))
434 return -EINVAL;
435
436 if (copy_from_user(a, args, len))
437 return -EFAULT;
438
439 ret = audit_socketcall_compat(len / sizeof(a[0]), a);
440 if (ret)
441 return ret;
442
443 a0 = a[0];
444 a1 = a[1];
445
446 switch (call) {
447 case SYS_SOCKET:
448 ret = __sys_socket(a0, a1, a[2]);
449 break;
450 case SYS_BIND:
451 ret = __sys_bind(a0, compat_ptr(a1), a[2]);
452 break;
453 case SYS_CONNECT:
454 ret = __sys_connect(a0, compat_ptr(a1), a[2]);
455 break;
456 case SYS_LISTEN:
457 ret = __sys_listen(a0, a1);
458 break;
459 case SYS_ACCEPT:
460 ret = __sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0);
461 break;
462 case SYS_GETSOCKNAME:
463 ret = __sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
464 break;
465 case SYS_GETPEERNAME:
466 ret = __sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2]));
467 break;
468 case SYS_SOCKETPAIR:
469 ret = __sys_socketpair(a0, a1, a[2], compat_ptr(a[3]));
470 break;
471 case SYS_SEND:
472 ret = __sys_sendto(a0, compat_ptr(a1), a[2], a[3], NULL, 0);
473 break;
474 case SYS_SENDTO:
475 ret = __sys_sendto(a0, compat_ptr(a1), a[2], a[3],
476 compat_ptr(a[4]), a[5]);
477 break;
478 case SYS_RECV:
479 ret = __compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3],
480 NULL, NULL);
481 break;
482 case SYS_RECVFROM:
483 ret = __compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3],
484 compat_ptr(a[4]),
485 compat_ptr(a[5]));
486 break;
487 case SYS_SHUTDOWN:
488 ret = __sys_shutdown(a0, a1);
489 break;
490 case SYS_SETSOCKOPT:
491 ret = __sys_setsockopt(a0, a1, a[2], compat_ptr(a[3]), a[4]);
492 break;
493 case SYS_GETSOCKOPT:
494 ret = __sys_getsockopt(a0, a1, a[2], compat_ptr(a[3]),
495 compat_ptr(a[4]));
496 break;
497 case SYS_SENDMSG:
498 ret = __compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
499 break;
500 case SYS_SENDMMSG:
501 ret = __compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]);
502 break;
503 case SYS_RECVMSG:
504 ret = __compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);
505 break;
506 case SYS_RECVMMSG:
507 ret = __sys_recvmmsg(a0, compat_ptr(a1), a[2],
508 a[3] | MSG_CMSG_COMPAT, NULL,
509 compat_ptr(a[4]));
510 break;
511 case SYS_ACCEPT4:
512 ret = __sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]);
513 break;
514 default:
515 ret = -EINVAL;
516 break;
517 }
518 return ret;
519}
1/*
2 * 32bit Socket syscall emulation. Based on arch/sparc64/kernel/sys_sparc32.c.
3 *
4 * Copyright (C) 2000 VA Linux Co
5 * Copyright (C) 2000 Don Dugger <n0ano@valinux.com>
6 * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com>
7 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
8 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
9 * Copyright (C) 2000 Hewlett-Packard Co.
10 * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com>
11 * Copyright (C) 2000,2001 Andi Kleen, SuSE Labs
12 */
13
14#include <linux/kernel.h>
15#include <linux/gfp.h>
16#include <linux/fs.h>
17#include <linux/types.h>
18#include <linux/file.h>
19#include <linux/icmpv6.h>
20#include <linux/socket.h>
21#include <linux/syscalls.h>
22#include <linux/filter.h>
23#include <linux/compat.h>
24#include <linux/security.h>
25
26#include <net/scm.h>
27#include <net/sock.h>
28#include <net/ip.h>
29#include <net/ipv6.h>
30#include <asm/uaccess.h>
31#include <net/compat.h>
32
33static inline int iov_from_user_compat_to_kern(struct iovec *kiov,
34 struct compat_iovec __user *uiov32,
35 int niov)
36{
37 int tot_len = 0;
38
39 while (niov > 0) {
40 compat_uptr_t buf;
41 compat_size_t len;
42
43 if (get_user(len, &uiov32->iov_len) ||
44 get_user(buf, &uiov32->iov_base))
45 return -EFAULT;
46
47 if (len > INT_MAX - tot_len)
48 len = INT_MAX - tot_len;
49
50 tot_len += len;
51 kiov->iov_base = compat_ptr(buf);
52 kiov->iov_len = (__kernel_size_t) len;
53 uiov32++;
54 kiov++;
55 niov--;
56 }
57 return tot_len;
58}
59
60int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg)
61{
62 compat_uptr_t tmp1, tmp2, tmp3;
63
64 if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) ||
65 __get_user(tmp1, &umsg->msg_name) ||
66 __get_user(kmsg->msg_namelen, &umsg->msg_namelen) ||
67 __get_user(tmp2, &umsg->msg_iov) ||
68 __get_user(kmsg->msg_iovlen, &umsg->msg_iovlen) ||
69 __get_user(tmp3, &umsg->msg_control) ||
70 __get_user(kmsg->msg_controllen, &umsg->msg_controllen) ||
71 __get_user(kmsg->msg_flags, &umsg->msg_flags))
72 return -EFAULT;
73 kmsg->msg_name = compat_ptr(tmp1);
74 kmsg->msg_iov = compat_ptr(tmp2);
75 kmsg->msg_control = compat_ptr(tmp3);
76 return 0;
77}
78
79/* I've named the args so it is easy to tell whose space the pointers are in. */
80int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov,
81 struct sockaddr *kern_address, int mode)
82{
83 int tot_len;
84
85 if (kern_msg->msg_namelen) {
86 if (mode == VERIFY_READ) {
87 int err = move_addr_to_kernel(kern_msg->msg_name,
88 kern_msg->msg_namelen,
89 kern_address);
90 if (err < 0)
91 return err;
92 }
93 kern_msg->msg_name = kern_address;
94 } else
95 kern_msg->msg_name = NULL;
96
97 tot_len = iov_from_user_compat_to_kern(kern_iov,
98 (struct compat_iovec __user *)kern_msg->msg_iov,
99 kern_msg->msg_iovlen);
100 if (tot_len >= 0)
101 kern_msg->msg_iov = kern_iov;
102
103 return tot_len;
104}
105
106/* Bleech... */
107#define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32))
108
109#define CMSG_COMPAT_DATA(cmsg) \
110 ((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr))))
111#define CMSG_COMPAT_SPACE(len) \
112 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len))
113#define CMSG_COMPAT_LEN(len) \
114 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len))
115
116#define CMSG_COMPAT_FIRSTHDR(msg) \
117 (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \
118 (struct compat_cmsghdr __user *)((msg)->msg_control) : \
119 (struct compat_cmsghdr __user *)NULL)
120
121#define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \
122 ((ucmlen) >= sizeof(struct compat_cmsghdr) && \
123 (ucmlen) <= (unsigned long) \
124 ((mhdr)->msg_controllen - \
125 ((char *)(ucmsg) - (char *)(mhdr)->msg_control)))
126
127static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg,
128 struct compat_cmsghdr __user *cmsg, int cmsg_len)
129{
130 char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len);
131 if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) >
132 msg->msg_controllen)
133 return NULL;
134 return (struct compat_cmsghdr __user *)ptr;
135}
136
137/* There is a lot of hair here because the alignment rules (and
138 * thus placement) of cmsg headers and length are different for
139 * 32-bit apps. -DaveM
140 */
141int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk,
142 unsigned char *stackbuf, int stackbuf_size)
143{
144 struct compat_cmsghdr __user *ucmsg;
145 struct cmsghdr *kcmsg, *kcmsg_base;
146 compat_size_t ucmlen;
147 __kernel_size_t kcmlen, tmp;
148 int err = -EFAULT;
149
150 kcmlen = 0;
151 kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf;
152 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
153 while (ucmsg != NULL) {
154 if (get_user(ucmlen, &ucmsg->cmsg_len))
155 return -EFAULT;
156
157 /* Catch bogons. */
158 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
159 return -EINVAL;
160
161 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
162 CMSG_ALIGN(sizeof(struct cmsghdr)));
163 tmp = CMSG_ALIGN(tmp);
164 kcmlen += tmp;
165 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
166 }
167 if (kcmlen == 0)
168 return -EINVAL;
169
170 /* The kcmlen holds the 64-bit version of the control length.
171 * It may not be modified as we do not stick it into the kmsg
172 * until we have successfully copied over all of the data
173 * from the user.
174 */
175 if (kcmlen > stackbuf_size)
176 kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL);
177 if (kcmsg == NULL)
178 return -ENOBUFS;
179
180 /* Now copy them over neatly. */
181 memset(kcmsg, 0, kcmlen);
182 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
183 while (ucmsg != NULL) {
184 if (__get_user(ucmlen, &ucmsg->cmsg_len))
185 goto Efault;
186 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
187 goto Einval;
188 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
189 CMSG_ALIGN(sizeof(struct cmsghdr)));
190 if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp))
191 goto Einval;
192 kcmsg->cmsg_len = tmp;
193 tmp = CMSG_ALIGN(tmp);
194 if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) ||
195 __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) ||
196 copy_from_user(CMSG_DATA(kcmsg),
197 CMSG_COMPAT_DATA(ucmsg),
198 (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg)))))
199 goto Efault;
200
201 /* Advance. */
202 kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp);
203 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
204 }
205
206 /* Ok, looks like we made it. Hook it up and return success. */
207 kmsg->msg_control = kcmsg_base;
208 kmsg->msg_controllen = kcmlen;
209 return 0;
210
211Einval:
212 err = -EINVAL;
213Efault:
214 if (kcmsg_base != (struct cmsghdr *)stackbuf)
215 sock_kfree_s(sk, kcmsg_base, kcmlen);
216 return err;
217}
218
219int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data)
220{
221 struct compat_timeval ctv;
222 struct compat_timespec cts[3];
223 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
224 struct compat_cmsghdr cmhdr;
225 int cmlen;
226
227 if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) {
228 kmsg->msg_flags |= MSG_CTRUNC;
229 return 0; /* XXX: return error? check spec. */
230 }
231
232 if (level == SOL_SOCKET && type == SCM_TIMESTAMP) {
233 struct timeval *tv = (struct timeval *)data;
234 ctv.tv_sec = tv->tv_sec;
235 ctv.tv_usec = tv->tv_usec;
236 data = &ctv;
237 len = sizeof(ctv);
238 }
239 if (level == SOL_SOCKET &&
240 (type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) {
241 int count = type == SCM_TIMESTAMPNS ? 1 : 3;
242 int i;
243 struct timespec *ts = (struct timespec *)data;
244 for (i = 0; i < count; i++) {
245 cts[i].tv_sec = ts[i].tv_sec;
246 cts[i].tv_nsec = ts[i].tv_nsec;
247 }
248 data = &cts;
249 len = sizeof(cts[0]) * count;
250 }
251
252 cmlen = CMSG_COMPAT_LEN(len);
253 if (kmsg->msg_controllen < cmlen) {
254 kmsg->msg_flags |= MSG_CTRUNC;
255 cmlen = kmsg->msg_controllen;
256 }
257 cmhdr.cmsg_level = level;
258 cmhdr.cmsg_type = type;
259 cmhdr.cmsg_len = cmlen;
260
261 if (copy_to_user(cm, &cmhdr, sizeof cmhdr))
262 return -EFAULT;
263 if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr)))
264 return -EFAULT;
265 cmlen = CMSG_COMPAT_SPACE(len);
266 if (kmsg->msg_controllen < cmlen)
267 cmlen = kmsg->msg_controllen;
268 kmsg->msg_control += cmlen;
269 kmsg->msg_controllen -= cmlen;
270 return 0;
271}
272
273void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm)
274{
275 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
276 int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int);
277 int fdnum = scm->fp->count;
278 struct file **fp = scm->fp->fp;
279 int __user *cmfptr;
280 int err = 0, i;
281
282 if (fdnum < fdmax)
283 fdmax = fdnum;
284
285 for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) {
286 int new_fd;
287 err = security_file_receive(fp[i]);
288 if (err)
289 break;
290 err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags
291 ? O_CLOEXEC : 0);
292 if (err < 0)
293 break;
294 new_fd = err;
295 err = put_user(new_fd, cmfptr);
296 if (err) {
297 put_unused_fd(new_fd);
298 break;
299 }
300 /* Bump the usage count and install the file. */
301 get_file(fp[i]);
302 fd_install(new_fd, fp[i]);
303 }
304
305 if (i > 0) {
306 int cmlen = CMSG_COMPAT_LEN(i * sizeof(int));
307 err = put_user(SOL_SOCKET, &cm->cmsg_level);
308 if (!err)
309 err = put_user(SCM_RIGHTS, &cm->cmsg_type);
310 if (!err)
311 err = put_user(cmlen, &cm->cmsg_len);
312 if (!err) {
313 cmlen = CMSG_COMPAT_SPACE(i * sizeof(int));
314 kmsg->msg_control += cmlen;
315 kmsg->msg_controllen -= cmlen;
316 }
317 }
318 if (i < fdnum)
319 kmsg->msg_flags |= MSG_CTRUNC;
320
321 /*
322 * All of the files that fit in the message have had their
323 * usage counts incremented, so we just free the list.
324 */
325 __scm_destroy(scm);
326}
327
328/*
329 * A struct sock_filter is architecture independent.
330 */
331struct compat_sock_fprog {
332 u16 len;
333 compat_uptr_t filter; /* struct sock_filter * */
334};
335
336static int do_set_attach_filter(struct socket *sock, int level, int optname,
337 char __user *optval, unsigned int optlen)
338{
339 struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval;
340 struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog));
341 compat_uptr_t ptr;
342 u16 len;
343
344 if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) ||
345 !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) ||
346 __get_user(len, &fprog32->len) ||
347 __get_user(ptr, &fprog32->filter) ||
348 __put_user(len, &kfprog->len) ||
349 __put_user(compat_ptr(ptr), &kfprog->filter))
350 return -EFAULT;
351
352 return sock_setsockopt(sock, level, optname, (char __user *)kfprog,
353 sizeof(struct sock_fprog));
354}
355
356static int do_set_sock_timeout(struct socket *sock, int level,
357 int optname, char __user *optval, unsigned int optlen)
358{
359 struct compat_timeval __user *up = (struct compat_timeval __user *)optval;
360 struct timeval ktime;
361 mm_segment_t old_fs;
362 int err;
363
364 if (optlen < sizeof(*up))
365 return -EINVAL;
366 if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
367 __get_user(ktime.tv_sec, &up->tv_sec) ||
368 __get_user(ktime.tv_usec, &up->tv_usec))
369 return -EFAULT;
370 old_fs = get_fs();
371 set_fs(KERNEL_DS);
372 err = sock_setsockopt(sock, level, optname, (char *)&ktime, sizeof(ktime));
373 set_fs(old_fs);
374
375 return err;
376}
377
378static int compat_sock_setsockopt(struct socket *sock, int level, int optname,
379 char __user *optval, unsigned int optlen)
380{
381 if (optname == SO_ATTACH_FILTER)
382 return do_set_attach_filter(sock, level, optname,
383 optval, optlen);
384 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
385 return do_set_sock_timeout(sock, level, optname, optval, optlen);
386
387 return sock_setsockopt(sock, level, optname, optval, optlen);
388}
389
390asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
391 char __user *optval, unsigned int optlen)
392{
393 int err;
394 struct socket *sock = sockfd_lookup(fd, &err);
395
396 if (sock) {
397 err = security_socket_setsockopt(sock, level, optname);
398 if (err) {
399 sockfd_put(sock);
400 return err;
401 }
402
403 if (level == SOL_SOCKET)
404 err = compat_sock_setsockopt(sock, level,
405 optname, optval, optlen);
406 else if (sock->ops->compat_setsockopt)
407 err = sock->ops->compat_setsockopt(sock, level,
408 optname, optval, optlen);
409 else
410 err = sock->ops->setsockopt(sock, level,
411 optname, optval, optlen);
412 sockfd_put(sock);
413 }
414 return err;
415}
416
417static int do_get_sock_timeout(struct socket *sock, int level, int optname,
418 char __user *optval, int __user *optlen)
419{
420 struct compat_timeval __user *up;
421 struct timeval ktime;
422 mm_segment_t old_fs;
423 int len, err;
424
425 up = (struct compat_timeval __user *) optval;
426 if (get_user(len, optlen))
427 return -EFAULT;
428 if (len < sizeof(*up))
429 return -EINVAL;
430 len = sizeof(ktime);
431 old_fs = get_fs();
432 set_fs(KERNEL_DS);
433 err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len);
434 set_fs(old_fs);
435
436 if (!err) {
437 if (put_user(sizeof(*up), optlen) ||
438 !access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
439 __put_user(ktime.tv_sec, &up->tv_sec) ||
440 __put_user(ktime.tv_usec, &up->tv_usec))
441 err = -EFAULT;
442 }
443 return err;
444}
445
446static int compat_sock_getsockopt(struct socket *sock, int level, int optname,
447 char __user *optval, int __user *optlen)
448{
449 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
450 return do_get_sock_timeout(sock, level, optname, optval, optlen);
451 return sock_getsockopt(sock, level, optname, optval, optlen);
452}
453
454int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp)
455{
456 struct compat_timeval __user *ctv =
457 (struct compat_timeval __user *) userstamp;
458 int err = -ENOENT;
459 struct timeval tv;
460
461 if (!sock_flag(sk, SOCK_TIMESTAMP))
462 sock_enable_timestamp(sk, SOCK_TIMESTAMP);
463 tv = ktime_to_timeval(sk->sk_stamp);
464 if (tv.tv_sec == -1)
465 return err;
466 if (tv.tv_sec == 0) {
467 sk->sk_stamp = ktime_get_real();
468 tv = ktime_to_timeval(sk->sk_stamp);
469 }
470 err = 0;
471 if (put_user(tv.tv_sec, &ctv->tv_sec) ||
472 put_user(tv.tv_usec, &ctv->tv_usec))
473 err = -EFAULT;
474 return err;
475}
476EXPORT_SYMBOL(compat_sock_get_timestamp);
477
478int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp)
479{
480 struct compat_timespec __user *ctv =
481 (struct compat_timespec __user *) userstamp;
482 int err = -ENOENT;
483 struct timespec ts;
484
485 if (!sock_flag(sk, SOCK_TIMESTAMP))
486 sock_enable_timestamp(sk, SOCK_TIMESTAMP);
487 ts = ktime_to_timespec(sk->sk_stamp);
488 if (ts.tv_sec == -1)
489 return err;
490 if (ts.tv_sec == 0) {
491 sk->sk_stamp = ktime_get_real();
492 ts = ktime_to_timespec(sk->sk_stamp);
493 }
494 err = 0;
495 if (put_user(ts.tv_sec, &ctv->tv_sec) ||
496 put_user(ts.tv_nsec, &ctv->tv_nsec))
497 err = -EFAULT;
498 return err;
499}
500EXPORT_SYMBOL(compat_sock_get_timestampns);
501
502asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
503 char __user *optval, int __user *optlen)
504{
505 int err;
506 struct socket *sock = sockfd_lookup(fd, &err);
507
508 if (sock) {
509 err = security_socket_getsockopt(sock, level, optname);
510 if (err) {
511 sockfd_put(sock);
512 return err;
513 }
514
515 if (level == SOL_SOCKET)
516 err = compat_sock_getsockopt(sock, level,
517 optname, optval, optlen);
518 else if (sock->ops->compat_getsockopt)
519 err = sock->ops->compat_getsockopt(sock, level,
520 optname, optval, optlen);
521 else
522 err = sock->ops->getsockopt(sock, level,
523 optname, optval, optlen);
524 sockfd_put(sock);
525 }
526 return err;
527}
528
529struct compat_group_req {
530 __u32 gr_interface;
531 struct __kernel_sockaddr_storage gr_group
532 __attribute__ ((aligned(4)));
533} __packed;
534
535struct compat_group_source_req {
536 __u32 gsr_interface;
537 struct __kernel_sockaddr_storage gsr_group
538 __attribute__ ((aligned(4)));
539 struct __kernel_sockaddr_storage gsr_source
540 __attribute__ ((aligned(4)));
541} __packed;
542
543struct compat_group_filter {
544 __u32 gf_interface;
545 struct __kernel_sockaddr_storage gf_group
546 __attribute__ ((aligned(4)));
547 __u32 gf_fmode;
548 __u32 gf_numsrc;
549 struct __kernel_sockaddr_storage gf_slist[1]
550 __attribute__ ((aligned(4)));
551} __packed;
552
553#define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \
554 sizeof(struct __kernel_sockaddr_storage))
555
556
557int compat_mc_setsockopt(struct sock *sock, int level, int optname,
558 char __user *optval, unsigned int optlen,
559 int (*setsockopt)(struct sock *, int, int, char __user *, unsigned int))
560{
561 char __user *koptval = optval;
562 int koptlen = optlen;
563
564 switch (optname) {
565 case MCAST_JOIN_GROUP:
566 case MCAST_LEAVE_GROUP:
567 {
568 struct compat_group_req __user *gr32 = (void *)optval;
569 struct group_req __user *kgr =
570 compat_alloc_user_space(sizeof(struct group_req));
571 u32 interface;
572
573 if (!access_ok(VERIFY_READ, gr32, sizeof(*gr32)) ||
574 !access_ok(VERIFY_WRITE, kgr, sizeof(struct group_req)) ||
575 __get_user(interface, &gr32->gr_interface) ||
576 __put_user(interface, &kgr->gr_interface) ||
577 copy_in_user(&kgr->gr_group, &gr32->gr_group,
578 sizeof(kgr->gr_group)))
579 return -EFAULT;
580 koptval = (char __user *)kgr;
581 koptlen = sizeof(struct group_req);
582 break;
583 }
584 case MCAST_JOIN_SOURCE_GROUP:
585 case MCAST_LEAVE_SOURCE_GROUP:
586 case MCAST_BLOCK_SOURCE:
587 case MCAST_UNBLOCK_SOURCE:
588 {
589 struct compat_group_source_req __user *gsr32 = (void *)optval;
590 struct group_source_req __user *kgsr = compat_alloc_user_space(
591 sizeof(struct group_source_req));
592 u32 interface;
593
594 if (!access_ok(VERIFY_READ, gsr32, sizeof(*gsr32)) ||
595 !access_ok(VERIFY_WRITE, kgsr,
596 sizeof(struct group_source_req)) ||
597 __get_user(interface, &gsr32->gsr_interface) ||
598 __put_user(interface, &kgsr->gsr_interface) ||
599 copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group,
600 sizeof(kgsr->gsr_group)) ||
601 copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source,
602 sizeof(kgsr->gsr_source)))
603 return -EFAULT;
604 koptval = (char __user *)kgsr;
605 koptlen = sizeof(struct group_source_req);
606 break;
607 }
608 case MCAST_MSFILTER:
609 {
610 struct compat_group_filter __user *gf32 = (void *)optval;
611 struct group_filter __user *kgf;
612 u32 interface, fmode, numsrc;
613
614 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) ||
615 __get_user(interface, &gf32->gf_interface) ||
616 __get_user(fmode, &gf32->gf_fmode) ||
617 __get_user(numsrc, &gf32->gf_numsrc))
618 return -EFAULT;
619 koptlen = optlen + sizeof(struct group_filter) -
620 sizeof(struct compat_group_filter);
621 if (koptlen < GROUP_FILTER_SIZE(numsrc))
622 return -EINVAL;
623 kgf = compat_alloc_user_space(koptlen);
624 if (!access_ok(VERIFY_WRITE, kgf, koptlen) ||
625 __put_user(interface, &kgf->gf_interface) ||
626 __put_user(fmode, &kgf->gf_fmode) ||
627 __put_user(numsrc, &kgf->gf_numsrc) ||
628 copy_in_user(&kgf->gf_group, &gf32->gf_group,
629 sizeof(kgf->gf_group)) ||
630 (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist,
631 numsrc * sizeof(kgf->gf_slist[0]))))
632 return -EFAULT;
633 koptval = (char __user *)kgf;
634 break;
635 }
636
637 default:
638 break;
639 }
640 return setsockopt(sock, level, optname, koptval, koptlen);
641}
642EXPORT_SYMBOL(compat_mc_setsockopt);
643
644int compat_mc_getsockopt(struct sock *sock, int level, int optname,
645 char __user *optval, int __user *optlen,
646 int (*getsockopt)(struct sock *, int, int, char __user *, int __user *))
647{
648 struct compat_group_filter __user *gf32 = (void *)optval;
649 struct group_filter __user *kgf;
650 int __user *koptlen;
651 u32 interface, fmode, numsrc;
652 int klen, ulen, err;
653
654 if (optname != MCAST_MSFILTER)
655 return getsockopt(sock, level, optname, optval, optlen);
656
657 koptlen = compat_alloc_user_space(sizeof(*koptlen));
658 if (!access_ok(VERIFY_READ, optlen, sizeof(*optlen)) ||
659 __get_user(ulen, optlen))
660 return -EFAULT;
661
662 /* adjust len for pad */
663 klen = ulen + sizeof(*kgf) - sizeof(*gf32);
664
665 if (klen < GROUP_FILTER_SIZE(0))
666 return -EINVAL;
667
668 if (!access_ok(VERIFY_WRITE, koptlen, sizeof(*koptlen)) ||
669 __put_user(klen, koptlen))
670 return -EFAULT;
671
672 /* have to allow space for previous compat_alloc_user_space, too */
673 kgf = compat_alloc_user_space(klen+sizeof(*optlen));
674
675 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) ||
676 __get_user(interface, &gf32->gf_interface) ||
677 __get_user(fmode, &gf32->gf_fmode) ||
678 __get_user(numsrc, &gf32->gf_numsrc) ||
679 __put_user(interface, &kgf->gf_interface) ||
680 __put_user(fmode, &kgf->gf_fmode) ||
681 __put_user(numsrc, &kgf->gf_numsrc) ||
682 copy_in_user(&kgf->gf_group, &gf32->gf_group, sizeof(kgf->gf_group)))
683 return -EFAULT;
684
685 err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen);
686 if (err)
687 return err;
688
689 if (!access_ok(VERIFY_READ, koptlen, sizeof(*koptlen)) ||
690 __get_user(klen, koptlen))
691 return -EFAULT;
692
693 ulen = klen - (sizeof(*kgf)-sizeof(*gf32));
694
695 if (!access_ok(VERIFY_WRITE, optlen, sizeof(*optlen)) ||
696 __put_user(ulen, optlen))
697 return -EFAULT;
698
699 if (!access_ok(VERIFY_READ, kgf, klen) ||
700 !access_ok(VERIFY_WRITE, gf32, ulen) ||
701 __get_user(interface, &kgf->gf_interface) ||
702 __get_user(fmode, &kgf->gf_fmode) ||
703 __get_user(numsrc, &kgf->gf_numsrc) ||
704 __put_user(interface, &gf32->gf_interface) ||
705 __put_user(fmode, &gf32->gf_fmode) ||
706 __put_user(numsrc, &gf32->gf_numsrc))
707 return -EFAULT;
708 if (numsrc) {
709 int copylen;
710
711 klen -= GROUP_FILTER_SIZE(0);
712 copylen = numsrc * sizeof(gf32->gf_slist[0]);
713 if (copylen > klen)
714 copylen = klen;
715 if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen))
716 return -EFAULT;
717 }
718 return err;
719}
720EXPORT_SYMBOL(compat_mc_getsockopt);
721
722
723/* Argument list sizes for compat_sys_socketcall */
724#define AL(x) ((x) * sizeof(u32))
725static unsigned char nas[21] = {
726 AL(0), AL(3), AL(3), AL(3), AL(2), AL(3),
727 AL(3), AL(3), AL(4), AL(4), AL(4), AL(6),
728 AL(6), AL(2), AL(5), AL(5), AL(3), AL(3),
729 AL(4), AL(5), AL(4)
730};
731#undef AL
732
733asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned flags)
734{
735 return sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
736}
737
738asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
739 unsigned vlen, unsigned int flags)
740{
741 return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
742 flags | MSG_CMSG_COMPAT);
743}
744
745asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags)
746{
747 return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
748}
749
750asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len, unsigned flags)
751{
752 return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT);
753}
754
755asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, size_t len,
756 unsigned flags, struct sockaddr __user *addr,
757 int __user *addrlen)
758{
759 return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen);
760}
761
762asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
763 unsigned vlen, unsigned int flags,
764 struct compat_timespec __user *timeout)
765{
766 int datagrams;
767 struct timespec ktspec;
768
769 if (timeout == NULL)
770 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
771 flags | MSG_CMSG_COMPAT, NULL);
772
773 if (get_compat_timespec(&ktspec, timeout))
774 return -EFAULT;
775
776 datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
777 flags | MSG_CMSG_COMPAT, &ktspec);
778 if (datagrams > 0 && put_compat_timespec(&ktspec, timeout))
779 datagrams = -EFAULT;
780
781 return datagrams;
782}
783
784asmlinkage long compat_sys_socketcall(int call, u32 __user *args)
785{
786 int ret;
787 u32 a[6];
788 u32 a0, a1;
789
790 if (call < SYS_SOCKET || call > SYS_SENDMMSG)
791 return -EINVAL;
792 if (copy_from_user(a, args, nas[call]))
793 return -EFAULT;
794 a0 = a[0];
795 a1 = a[1];
796
797 switch (call) {
798 case SYS_SOCKET:
799 ret = sys_socket(a0, a1, a[2]);
800 break;
801 case SYS_BIND:
802 ret = sys_bind(a0, compat_ptr(a1), a[2]);
803 break;
804 case SYS_CONNECT:
805 ret = sys_connect(a0, compat_ptr(a1), a[2]);
806 break;
807 case SYS_LISTEN:
808 ret = sys_listen(a0, a1);
809 break;
810 case SYS_ACCEPT:
811 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0);
812 break;
813 case SYS_GETSOCKNAME:
814 ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
815 break;
816 case SYS_GETPEERNAME:
817 ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2]));
818 break;
819 case SYS_SOCKETPAIR:
820 ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3]));
821 break;
822 case SYS_SEND:
823 ret = sys_send(a0, compat_ptr(a1), a[2], a[3]);
824 break;
825 case SYS_SENDTO:
826 ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]);
827 break;
828 case SYS_RECV:
829 ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]);
830 break;
831 case SYS_RECVFROM:
832 ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3],
833 compat_ptr(a[4]), compat_ptr(a[5]));
834 break;
835 case SYS_SHUTDOWN:
836 ret = sys_shutdown(a0, a1);
837 break;
838 case SYS_SETSOCKOPT:
839 ret = compat_sys_setsockopt(a0, a1, a[2],
840 compat_ptr(a[3]), a[4]);
841 break;
842 case SYS_GETSOCKOPT:
843 ret = compat_sys_getsockopt(a0, a1, a[2],
844 compat_ptr(a[3]), compat_ptr(a[4]));
845 break;
846 case SYS_SENDMSG:
847 ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
848 break;
849 case SYS_SENDMMSG:
850 ret = compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]);
851 break;
852 case SYS_RECVMSG:
853 ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);
854 break;
855 case SYS_RECVMMSG:
856 ret = compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3],
857 compat_ptr(a[4]));
858 break;
859 case SYS_ACCEPT4:
860 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]);
861 break;
862 default:
863 ret = -EINVAL;
864 break;
865 }
866 return ret;
867}