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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#include <linux/export.h>
26
27#include <net/scm.h>
28#include <net/sock.h>
29#include <net/ip.h>
30#include <net/ipv6.h>
31#include <asm/uaccess.h>
32#include <net/compat.h>
33
34static inline int iov_from_user_compat_to_kern(struct iovec *kiov,
35 struct compat_iovec __user *uiov32,
36 int niov)
37{
38 int tot_len = 0;
39
40 while (niov > 0) {
41 compat_uptr_t buf;
42 compat_size_t len;
43
44 if (get_user(len, &uiov32->iov_len) ||
45 get_user(buf, &uiov32->iov_base))
46 return -EFAULT;
47
48 if (len > INT_MAX - tot_len)
49 len = INT_MAX - tot_len;
50
51 tot_len += len;
52 kiov->iov_base = compat_ptr(buf);
53 kiov->iov_len = (__kernel_size_t) len;
54 uiov32++;
55 kiov++;
56 niov--;
57 }
58 return tot_len;
59}
60
61int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg)
62{
63 compat_uptr_t tmp1, tmp2, tmp3;
64
65 if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) ||
66 __get_user(tmp1, &umsg->msg_name) ||
67 __get_user(kmsg->msg_namelen, &umsg->msg_namelen) ||
68 __get_user(tmp2, &umsg->msg_iov) ||
69 __get_user(kmsg->msg_iovlen, &umsg->msg_iovlen) ||
70 __get_user(tmp3, &umsg->msg_control) ||
71 __get_user(kmsg->msg_controllen, &umsg->msg_controllen) ||
72 __get_user(kmsg->msg_flags, &umsg->msg_flags))
73 return -EFAULT;
74 if (kmsg->msg_namelen > sizeof(struct sockaddr_storage))
75 kmsg->msg_namelen = sizeof(struct sockaddr_storage);
76 kmsg->msg_name = compat_ptr(tmp1);
77 kmsg->msg_iov = compat_ptr(tmp2);
78 kmsg->msg_control = compat_ptr(tmp3);
79 return 0;
80}
81
82/* I've named the args so it is easy to tell whose space the pointers are in. */
83int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov,
84 struct sockaddr_storage *kern_address, int mode)
85{
86 int tot_len;
87
88 if (kern_msg->msg_namelen) {
89 if (mode == VERIFY_READ) {
90 int err = move_addr_to_kernel(kern_msg->msg_name,
91 kern_msg->msg_namelen,
92 kern_address);
93 if (err < 0)
94 return err;
95 }
96 if (kern_msg->msg_name)
97 kern_msg->msg_name = kern_address;
98 } else
99 kern_msg->msg_name = NULL;
100
101 tot_len = iov_from_user_compat_to_kern(kern_iov,
102 (struct compat_iovec __user *)kern_msg->msg_iov,
103 kern_msg->msg_iovlen);
104 if (tot_len >= 0)
105 kern_msg->msg_iov = kern_iov;
106
107 return tot_len;
108}
109
110/* Bleech... */
111#define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32))
112
113#define CMSG_COMPAT_DATA(cmsg) \
114 ((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr))))
115#define CMSG_COMPAT_SPACE(len) \
116 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len))
117#define CMSG_COMPAT_LEN(len) \
118 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len))
119
120#define CMSG_COMPAT_FIRSTHDR(msg) \
121 (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \
122 (struct compat_cmsghdr __user *)((msg)->msg_control) : \
123 (struct compat_cmsghdr __user *)NULL)
124
125#define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \
126 ((ucmlen) >= sizeof(struct compat_cmsghdr) && \
127 (ucmlen) <= (unsigned long) \
128 ((mhdr)->msg_controllen - \
129 ((char *)(ucmsg) - (char *)(mhdr)->msg_control)))
130
131static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg,
132 struct compat_cmsghdr __user *cmsg, int cmsg_len)
133{
134 char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len);
135 if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) >
136 msg->msg_controllen)
137 return NULL;
138 return (struct compat_cmsghdr __user *)ptr;
139}
140
141/* There is a lot of hair here because the alignment rules (and
142 * thus placement) of cmsg headers and length are different for
143 * 32-bit apps. -DaveM
144 */
145int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk,
146 unsigned char *stackbuf, int stackbuf_size)
147{
148 struct compat_cmsghdr __user *ucmsg;
149 struct cmsghdr *kcmsg, *kcmsg_base;
150 compat_size_t ucmlen;
151 __kernel_size_t kcmlen, tmp;
152 int err = -EFAULT;
153
154 kcmlen = 0;
155 kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf;
156 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
157 while (ucmsg != NULL) {
158 if (get_user(ucmlen, &ucmsg->cmsg_len))
159 return -EFAULT;
160
161 /* Catch bogons. */
162 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
163 return -EINVAL;
164
165 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
166 CMSG_ALIGN(sizeof(struct cmsghdr)));
167 tmp = CMSG_ALIGN(tmp);
168 kcmlen += tmp;
169 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
170 }
171 if (kcmlen == 0)
172 return -EINVAL;
173
174 /* The kcmlen holds the 64-bit version of the control length.
175 * It may not be modified as we do not stick it into the kmsg
176 * until we have successfully copied over all of the data
177 * from the user.
178 */
179 if (kcmlen > stackbuf_size)
180 kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL);
181 if (kcmsg == NULL)
182 return -ENOBUFS;
183
184 /* Now copy them over neatly. */
185 memset(kcmsg, 0, kcmlen);
186 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
187 while (ucmsg != NULL) {
188 if (__get_user(ucmlen, &ucmsg->cmsg_len))
189 goto Efault;
190 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
191 goto Einval;
192 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
193 CMSG_ALIGN(sizeof(struct cmsghdr)));
194 if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp))
195 goto Einval;
196 kcmsg->cmsg_len = tmp;
197 tmp = CMSG_ALIGN(tmp);
198 if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) ||
199 __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) ||
200 copy_from_user(CMSG_DATA(kcmsg),
201 CMSG_COMPAT_DATA(ucmsg),
202 (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg)))))
203 goto Efault;
204
205 /* Advance. */
206 kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp);
207 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
208 }
209
210 /* Ok, looks like we made it. Hook it up and return success. */
211 kmsg->msg_control = kcmsg_base;
212 kmsg->msg_controllen = kcmlen;
213 return 0;
214
215Einval:
216 err = -EINVAL;
217Efault:
218 if (kcmsg_base != (struct cmsghdr *)stackbuf)
219 sock_kfree_s(sk, kcmsg_base, kcmlen);
220 return err;
221}
222
223int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data)
224{
225 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
226 struct compat_cmsghdr cmhdr;
227 struct compat_timeval ctv;
228 struct compat_timespec cts[3];
229 int cmlen;
230
231 if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) {
232 kmsg->msg_flags |= MSG_CTRUNC;
233 return 0; /* XXX: return error? check spec. */
234 }
235
236 if (!COMPAT_USE_64BIT_TIME) {
237 if (level == SOL_SOCKET && type == SCM_TIMESTAMP) {
238 struct timeval *tv = (struct timeval *)data;
239 ctv.tv_sec = tv->tv_sec;
240 ctv.tv_usec = tv->tv_usec;
241 data = &ctv;
242 len = sizeof(ctv);
243 }
244 if (level == SOL_SOCKET &&
245 (type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) {
246 int count = type == SCM_TIMESTAMPNS ? 1 : 3;
247 int i;
248 struct timespec *ts = (struct timespec *)data;
249 for (i = 0; i < count; i++) {
250 cts[i].tv_sec = ts[i].tv_sec;
251 cts[i].tv_nsec = ts[i].tv_nsec;
252 }
253 data = &cts;
254 len = sizeof(cts[0]) * count;
255 }
256 }
257
258 cmlen = CMSG_COMPAT_LEN(len);
259 if (kmsg->msg_controllen < cmlen) {
260 kmsg->msg_flags |= MSG_CTRUNC;
261 cmlen = kmsg->msg_controllen;
262 }
263 cmhdr.cmsg_level = level;
264 cmhdr.cmsg_type = type;
265 cmhdr.cmsg_len = cmlen;
266
267 if (copy_to_user(cm, &cmhdr, sizeof cmhdr))
268 return -EFAULT;
269 if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr)))
270 return -EFAULT;
271 cmlen = CMSG_COMPAT_SPACE(len);
272 if (kmsg->msg_controllen < cmlen)
273 cmlen = kmsg->msg_controllen;
274 kmsg->msg_control += cmlen;
275 kmsg->msg_controllen -= cmlen;
276 return 0;
277}
278
279void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm)
280{
281 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
282 int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int);
283 int fdnum = scm->fp->count;
284 struct file **fp = scm->fp->fp;
285 int __user *cmfptr;
286 int err = 0, i;
287
288 if (fdnum < fdmax)
289 fdmax = fdnum;
290
291 for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) {
292 int new_fd;
293 err = security_file_receive(fp[i]);
294 if (err)
295 break;
296 err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags
297 ? O_CLOEXEC : 0);
298 if (err < 0)
299 break;
300 new_fd = err;
301 err = put_user(new_fd, cmfptr);
302 if (err) {
303 put_unused_fd(new_fd);
304 break;
305 }
306 /* Bump the usage count and install the file. */
307 fd_install(new_fd, get_file(fp[i]));
308 }
309
310 if (i > 0) {
311 int cmlen = CMSG_COMPAT_LEN(i * sizeof(int));
312 err = put_user(SOL_SOCKET, &cm->cmsg_level);
313 if (!err)
314 err = put_user(SCM_RIGHTS, &cm->cmsg_type);
315 if (!err)
316 err = put_user(cmlen, &cm->cmsg_len);
317 if (!err) {
318 cmlen = CMSG_COMPAT_SPACE(i * sizeof(int));
319 kmsg->msg_control += cmlen;
320 kmsg->msg_controllen -= cmlen;
321 }
322 }
323 if (i < fdnum)
324 kmsg->msg_flags |= MSG_CTRUNC;
325
326 /*
327 * All of the files that fit in the message have had their
328 * usage counts incremented, so we just free the list.
329 */
330 __scm_destroy(scm);
331}
332
333static int do_set_attach_filter(struct socket *sock, int level, int optname,
334 char __user *optval, unsigned int optlen)
335{
336 struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval;
337 struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog));
338 compat_uptr_t ptr;
339 u16 len;
340
341 if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) ||
342 !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) ||
343 __get_user(len, &fprog32->len) ||
344 __get_user(ptr, &fprog32->filter) ||
345 __put_user(len, &kfprog->len) ||
346 __put_user(compat_ptr(ptr), &kfprog->filter))
347 return -EFAULT;
348
349 return sock_setsockopt(sock, level, optname, (char __user *)kfprog,
350 sizeof(struct sock_fprog));
351}
352
353static int do_set_sock_timeout(struct socket *sock, int level,
354 int optname, char __user *optval, unsigned int optlen)
355{
356 struct compat_timeval __user *up = (struct compat_timeval __user *)optval;
357 struct timeval ktime;
358 mm_segment_t old_fs;
359 int err;
360
361 if (optlen < sizeof(*up))
362 return -EINVAL;
363 if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
364 __get_user(ktime.tv_sec, &up->tv_sec) ||
365 __get_user(ktime.tv_usec, &up->tv_usec))
366 return -EFAULT;
367 old_fs = get_fs();
368 set_fs(KERNEL_DS);
369 err = sock_setsockopt(sock, level, optname, (char *)&ktime, sizeof(ktime));
370 set_fs(old_fs);
371
372 return err;
373}
374
375static int compat_sock_setsockopt(struct socket *sock, int level, int optname,
376 char __user *optval, unsigned int optlen)
377{
378 if (optname == SO_ATTACH_FILTER)
379 return do_set_attach_filter(sock, level, optname,
380 optval, optlen);
381 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
382 return do_set_sock_timeout(sock, level, optname, optval, optlen);
383
384 return sock_setsockopt(sock, level, optname, optval, optlen);
385}
386
387COMPAT_SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname,
388 char __user *, optval, unsigned int, optlen)
389{
390 int err;
391 struct socket *sock = sockfd_lookup(fd, &err);
392
393 if (sock) {
394 err = security_socket_setsockopt(sock, level, optname);
395 if (err) {
396 sockfd_put(sock);
397 return err;
398 }
399
400 if (level == SOL_SOCKET)
401 err = compat_sock_setsockopt(sock, level,
402 optname, optval, optlen);
403 else if (sock->ops->compat_setsockopt)
404 err = sock->ops->compat_setsockopt(sock, level,
405 optname, optval, optlen);
406 else
407 err = sock->ops->setsockopt(sock, level,
408 optname, optval, optlen);
409 sockfd_put(sock);
410 }
411 return err;
412}
413
414static int do_get_sock_timeout(struct socket *sock, int level, int optname,
415 char __user *optval, int __user *optlen)
416{
417 struct compat_timeval __user *up;
418 struct timeval ktime;
419 mm_segment_t old_fs;
420 int len, err;
421
422 up = (struct compat_timeval __user *) optval;
423 if (get_user(len, optlen))
424 return -EFAULT;
425 if (len < sizeof(*up))
426 return -EINVAL;
427 len = sizeof(ktime);
428 old_fs = get_fs();
429 set_fs(KERNEL_DS);
430 err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len);
431 set_fs(old_fs);
432
433 if (!err) {
434 if (put_user(sizeof(*up), optlen) ||
435 !access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
436 __put_user(ktime.tv_sec, &up->tv_sec) ||
437 __put_user(ktime.tv_usec, &up->tv_usec))
438 err = -EFAULT;
439 }
440 return err;
441}
442
443static int compat_sock_getsockopt(struct socket *sock, int level, int optname,
444 char __user *optval, int __user *optlen)
445{
446 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
447 return do_get_sock_timeout(sock, level, optname, optval, optlen);
448 return sock_getsockopt(sock, level, optname, optval, optlen);
449}
450
451int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp)
452{
453 struct compat_timeval __user *ctv;
454 int err;
455 struct timeval tv;
456
457 if (COMPAT_USE_64BIT_TIME)
458 return sock_get_timestamp(sk, userstamp);
459
460 ctv = (struct compat_timeval __user *) userstamp;
461 err = -ENOENT;
462 if (!sock_flag(sk, SOCK_TIMESTAMP))
463 sock_enable_timestamp(sk, SOCK_TIMESTAMP);
464 tv = ktime_to_timeval(sk->sk_stamp);
465 if (tv.tv_sec == -1)
466 return err;
467 if (tv.tv_sec == 0) {
468 sk->sk_stamp = ktime_get_real();
469 tv = ktime_to_timeval(sk->sk_stamp);
470 }
471 err = 0;
472 if (put_user(tv.tv_sec, &ctv->tv_sec) ||
473 put_user(tv.tv_usec, &ctv->tv_usec))
474 err = -EFAULT;
475 return err;
476}
477EXPORT_SYMBOL(compat_sock_get_timestamp);
478
479int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp)
480{
481 struct compat_timespec __user *ctv;
482 int err;
483 struct timespec ts;
484
485 if (COMPAT_USE_64BIT_TIME)
486 return sock_get_timestampns (sk, userstamp);
487
488 ctv = (struct compat_timespec __user *) userstamp;
489 err = -ENOENT;
490 if (!sock_flag(sk, SOCK_TIMESTAMP))
491 sock_enable_timestamp(sk, SOCK_TIMESTAMP);
492 ts = ktime_to_timespec(sk->sk_stamp);
493 if (ts.tv_sec == -1)
494 return err;
495 if (ts.tv_sec == 0) {
496 sk->sk_stamp = ktime_get_real();
497 ts = ktime_to_timespec(sk->sk_stamp);
498 }
499 err = 0;
500 if (put_user(ts.tv_sec, &ctv->tv_sec) ||
501 put_user(ts.tv_nsec, &ctv->tv_nsec))
502 err = -EFAULT;
503 return err;
504}
505EXPORT_SYMBOL(compat_sock_get_timestampns);
506
507COMPAT_SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname,
508 char __user *, optval, int __user *, optlen)
509{
510 int err;
511 struct socket *sock = sockfd_lookup(fd, &err);
512
513 if (sock) {
514 err = security_socket_getsockopt(sock, level, optname);
515 if (err) {
516 sockfd_put(sock);
517 return err;
518 }
519
520 if (level == SOL_SOCKET)
521 err = compat_sock_getsockopt(sock, level,
522 optname, optval, optlen);
523 else if (sock->ops->compat_getsockopt)
524 err = sock->ops->compat_getsockopt(sock, level,
525 optname, optval, optlen);
526 else
527 err = sock->ops->getsockopt(sock, level,
528 optname, optval, optlen);
529 sockfd_put(sock);
530 }
531 return err;
532}
533
534struct compat_group_req {
535 __u32 gr_interface;
536 struct __kernel_sockaddr_storage gr_group
537 __attribute__ ((aligned(4)));
538} __packed;
539
540struct compat_group_source_req {
541 __u32 gsr_interface;
542 struct __kernel_sockaddr_storage gsr_group
543 __attribute__ ((aligned(4)));
544 struct __kernel_sockaddr_storage gsr_source
545 __attribute__ ((aligned(4)));
546} __packed;
547
548struct compat_group_filter {
549 __u32 gf_interface;
550 struct __kernel_sockaddr_storage gf_group
551 __attribute__ ((aligned(4)));
552 __u32 gf_fmode;
553 __u32 gf_numsrc;
554 struct __kernel_sockaddr_storage gf_slist[1]
555 __attribute__ ((aligned(4)));
556} __packed;
557
558#define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \
559 sizeof(struct __kernel_sockaddr_storage))
560
561
562int compat_mc_setsockopt(struct sock *sock, int level, int optname,
563 char __user *optval, unsigned int optlen,
564 int (*setsockopt)(struct sock *, int, int, char __user *, unsigned int))
565{
566 char __user *koptval = optval;
567 int koptlen = optlen;
568
569 switch (optname) {
570 case MCAST_JOIN_GROUP:
571 case MCAST_LEAVE_GROUP:
572 {
573 struct compat_group_req __user *gr32 = (void *)optval;
574 struct group_req __user *kgr =
575 compat_alloc_user_space(sizeof(struct group_req));
576 u32 interface;
577
578 if (!access_ok(VERIFY_READ, gr32, sizeof(*gr32)) ||
579 !access_ok(VERIFY_WRITE, kgr, sizeof(struct group_req)) ||
580 __get_user(interface, &gr32->gr_interface) ||
581 __put_user(interface, &kgr->gr_interface) ||
582 copy_in_user(&kgr->gr_group, &gr32->gr_group,
583 sizeof(kgr->gr_group)))
584 return -EFAULT;
585 koptval = (char __user *)kgr;
586 koptlen = sizeof(struct group_req);
587 break;
588 }
589 case MCAST_JOIN_SOURCE_GROUP:
590 case MCAST_LEAVE_SOURCE_GROUP:
591 case MCAST_BLOCK_SOURCE:
592 case MCAST_UNBLOCK_SOURCE:
593 {
594 struct compat_group_source_req __user *gsr32 = (void *)optval;
595 struct group_source_req __user *kgsr = compat_alloc_user_space(
596 sizeof(struct group_source_req));
597 u32 interface;
598
599 if (!access_ok(VERIFY_READ, gsr32, sizeof(*gsr32)) ||
600 !access_ok(VERIFY_WRITE, kgsr,
601 sizeof(struct group_source_req)) ||
602 __get_user(interface, &gsr32->gsr_interface) ||
603 __put_user(interface, &kgsr->gsr_interface) ||
604 copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group,
605 sizeof(kgsr->gsr_group)) ||
606 copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source,
607 sizeof(kgsr->gsr_source)))
608 return -EFAULT;
609 koptval = (char __user *)kgsr;
610 koptlen = sizeof(struct group_source_req);
611 break;
612 }
613 case MCAST_MSFILTER:
614 {
615 struct compat_group_filter __user *gf32 = (void *)optval;
616 struct group_filter __user *kgf;
617 u32 interface, fmode, numsrc;
618
619 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) ||
620 __get_user(interface, &gf32->gf_interface) ||
621 __get_user(fmode, &gf32->gf_fmode) ||
622 __get_user(numsrc, &gf32->gf_numsrc))
623 return -EFAULT;
624 koptlen = optlen + sizeof(struct group_filter) -
625 sizeof(struct compat_group_filter);
626 if (koptlen < GROUP_FILTER_SIZE(numsrc))
627 return -EINVAL;
628 kgf = compat_alloc_user_space(koptlen);
629 if (!access_ok(VERIFY_WRITE, kgf, koptlen) ||
630 __put_user(interface, &kgf->gf_interface) ||
631 __put_user(fmode, &kgf->gf_fmode) ||
632 __put_user(numsrc, &kgf->gf_numsrc) ||
633 copy_in_user(&kgf->gf_group, &gf32->gf_group,
634 sizeof(kgf->gf_group)) ||
635 (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist,
636 numsrc * sizeof(kgf->gf_slist[0]))))
637 return -EFAULT;
638 koptval = (char __user *)kgf;
639 break;
640 }
641
642 default:
643 break;
644 }
645 return setsockopt(sock, level, optname, koptval, koptlen);
646}
647EXPORT_SYMBOL(compat_mc_setsockopt);
648
649int compat_mc_getsockopt(struct sock *sock, int level, int optname,
650 char __user *optval, int __user *optlen,
651 int (*getsockopt)(struct sock *, int, int, char __user *, int __user *))
652{
653 struct compat_group_filter __user *gf32 = (void *)optval;
654 struct group_filter __user *kgf;
655 int __user *koptlen;
656 u32 interface, fmode, numsrc;
657 int klen, ulen, err;
658
659 if (optname != MCAST_MSFILTER)
660 return getsockopt(sock, level, optname, optval, optlen);
661
662 koptlen = compat_alloc_user_space(sizeof(*koptlen));
663 if (!access_ok(VERIFY_READ, optlen, sizeof(*optlen)) ||
664 __get_user(ulen, optlen))
665 return -EFAULT;
666
667 /* adjust len for pad */
668 klen = ulen + sizeof(*kgf) - sizeof(*gf32);
669
670 if (klen < GROUP_FILTER_SIZE(0))
671 return -EINVAL;
672
673 if (!access_ok(VERIFY_WRITE, koptlen, sizeof(*koptlen)) ||
674 __put_user(klen, koptlen))
675 return -EFAULT;
676
677 /* have to allow space for previous compat_alloc_user_space, too */
678 kgf = compat_alloc_user_space(klen+sizeof(*optlen));
679
680 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) ||
681 __get_user(interface, &gf32->gf_interface) ||
682 __get_user(fmode, &gf32->gf_fmode) ||
683 __get_user(numsrc, &gf32->gf_numsrc) ||
684 __put_user(interface, &kgf->gf_interface) ||
685 __put_user(fmode, &kgf->gf_fmode) ||
686 __put_user(numsrc, &kgf->gf_numsrc) ||
687 copy_in_user(&kgf->gf_group, &gf32->gf_group, sizeof(kgf->gf_group)))
688 return -EFAULT;
689
690 err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen);
691 if (err)
692 return err;
693
694 if (!access_ok(VERIFY_READ, koptlen, sizeof(*koptlen)) ||
695 __get_user(klen, koptlen))
696 return -EFAULT;
697
698 ulen = klen - (sizeof(*kgf)-sizeof(*gf32));
699
700 if (!access_ok(VERIFY_WRITE, optlen, sizeof(*optlen)) ||
701 __put_user(ulen, optlen))
702 return -EFAULT;
703
704 if (!access_ok(VERIFY_READ, kgf, klen) ||
705 !access_ok(VERIFY_WRITE, gf32, ulen) ||
706 __get_user(interface, &kgf->gf_interface) ||
707 __get_user(fmode, &kgf->gf_fmode) ||
708 __get_user(numsrc, &kgf->gf_numsrc) ||
709 __put_user(interface, &gf32->gf_interface) ||
710 __put_user(fmode, &gf32->gf_fmode) ||
711 __put_user(numsrc, &gf32->gf_numsrc))
712 return -EFAULT;
713 if (numsrc) {
714 int copylen;
715
716 klen -= GROUP_FILTER_SIZE(0);
717 copylen = numsrc * sizeof(gf32->gf_slist[0]);
718 if (copylen > klen)
719 copylen = klen;
720 if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen))
721 return -EFAULT;
722 }
723 return err;
724}
725EXPORT_SYMBOL(compat_mc_getsockopt);
726
727
728/* Argument list sizes for compat_sys_socketcall */
729#define AL(x) ((x) * sizeof(u32))
730static unsigned char nas[21] = {
731 AL(0), AL(3), AL(3), AL(3), AL(2), AL(3),
732 AL(3), AL(3), AL(4), AL(4), AL(4), AL(6),
733 AL(6), AL(2), AL(5), AL(5), AL(3), AL(3),
734 AL(4), AL(5), AL(4)
735};
736#undef AL
737
738COMPAT_SYSCALL_DEFINE3(sendmsg, int, fd, struct compat_msghdr __user *, msg, unsigned int, flags)
739{
740 if (flags & MSG_CMSG_COMPAT)
741 return -EINVAL;
742 return __sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
743}
744
745COMPAT_SYSCALL_DEFINE4(sendmmsg, int, fd, struct compat_mmsghdr __user *, mmsg,
746 unsigned int, vlen, unsigned int, flags)
747{
748 if (flags & MSG_CMSG_COMPAT)
749 return -EINVAL;
750 return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
751 flags | MSG_CMSG_COMPAT);
752}
753
754COMPAT_SYSCALL_DEFINE3(recvmsg, int, fd, struct compat_msghdr __user *, msg, unsigned int, flags)
755{
756 if (flags & MSG_CMSG_COMPAT)
757 return -EINVAL;
758 return __sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
759}
760
761COMPAT_SYSCALL_DEFINE4(recv, int, fd, void __user *, buf, compat_size_t, len, unsigned int, flags)
762{
763 return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT);
764}
765
766COMPAT_SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, buf, compat_size_t, len,
767 unsigned int, flags, struct sockaddr __user *, addr,
768 int __user *, addrlen)
769{
770 return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen);
771}
772
773COMPAT_SYSCALL_DEFINE5(recvmmsg, int, fd, struct compat_mmsghdr __user *, mmsg,
774 unsigned int, vlen, unsigned int, flags,
775 struct compat_timespec __user *, timeout)
776{
777 int datagrams;
778 struct timespec ktspec;
779
780 if (flags & MSG_CMSG_COMPAT)
781 return -EINVAL;
782
783 if (timeout == NULL)
784 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
785 flags | MSG_CMSG_COMPAT, NULL);
786
787 if (compat_get_timespec(&ktspec, timeout))
788 return -EFAULT;
789
790 datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
791 flags | MSG_CMSG_COMPAT, &ktspec);
792 if (datagrams > 0 && compat_put_timespec(&ktspec, timeout))
793 datagrams = -EFAULT;
794
795 return datagrams;
796}
797
798COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user *, args)
799{
800 int ret;
801 u32 a[6];
802 u32 a0, a1;
803
804 if (call < SYS_SOCKET || call > SYS_SENDMMSG)
805 return -EINVAL;
806 if (copy_from_user(a, args, nas[call]))
807 return -EFAULT;
808 a0 = a[0];
809 a1 = a[1];
810
811 switch (call) {
812 case SYS_SOCKET:
813 ret = sys_socket(a0, a1, a[2]);
814 break;
815 case SYS_BIND:
816 ret = sys_bind(a0, compat_ptr(a1), a[2]);
817 break;
818 case SYS_CONNECT:
819 ret = sys_connect(a0, compat_ptr(a1), a[2]);
820 break;
821 case SYS_LISTEN:
822 ret = sys_listen(a0, a1);
823 break;
824 case SYS_ACCEPT:
825 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0);
826 break;
827 case SYS_GETSOCKNAME:
828 ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
829 break;
830 case SYS_GETPEERNAME:
831 ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2]));
832 break;
833 case SYS_SOCKETPAIR:
834 ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3]));
835 break;
836 case SYS_SEND:
837 ret = sys_send(a0, compat_ptr(a1), a[2], a[3]);
838 break;
839 case SYS_SENDTO:
840 ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]);
841 break;
842 case SYS_RECV:
843 ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]);
844 break;
845 case SYS_RECVFROM:
846 ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3],
847 compat_ptr(a[4]), compat_ptr(a[5]));
848 break;
849 case SYS_SHUTDOWN:
850 ret = sys_shutdown(a0, a1);
851 break;
852 case SYS_SETSOCKOPT:
853 ret = compat_sys_setsockopt(a0, a1, a[2],
854 compat_ptr(a[3]), a[4]);
855 break;
856 case SYS_GETSOCKOPT:
857 ret = compat_sys_getsockopt(a0, a1, a[2],
858 compat_ptr(a[3]), compat_ptr(a[4]));
859 break;
860 case SYS_SENDMSG:
861 ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
862 break;
863 case SYS_SENDMMSG:
864 ret = compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]);
865 break;
866 case SYS_RECVMSG:
867 ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);
868 break;
869 case SYS_RECVMMSG:
870 ret = compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3],
871 compat_ptr(a[4]));
872 break;
873 case SYS_ACCEPT4:
874 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]);
875 break;
876 default:
877 ret = -EINVAL;
878 break;
879 }
880 return ret;
881}