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f2fs: check entire encrypted bigname when finding a dentry
[GitHub/exynos8895/android_kernel_samsung_universal8895.git] / net / compat.c
CommitLineData
4768fbcb 1/*
1da177e4
LT		 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>
4768fbcb 11 * Copyright (C) 2000,2001 Andi Kleen, SuSE Labs
1da177e4
LT		 12 */
13
14#include <linux/kernel.h>
5a0e3ad6 15#include <linux/gfp.h>
1da177e4 16#include <linux/fs.h>
1da177e4
LT		 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>
1da177e4 24#include <linux/security.h>
bc3b2d7f 25#include <linux/export.h>
1da177e4
LT		 26
27#include <net/scm.h>
28#include <net/sock.h>
dae50295
DS		 29#include <net/ip.h>
30#include <net/ipv6.h>
1da177e4
LT		 31#include <asm/uaccess.h>
32#include <net/compat.h>
33
da184284
AV		 34int get_compat_msghdr(struct msghdr *kmsg,
35 struct compat_msghdr __user *umsg,
36 struct sockaddr __user **save_addr,
37 struct iovec **iov)
1da177e4 38{
08adb7da 39 compat_uptr_t uaddr, uiov, tmp3;
c0371da6 40 compat_size_t nr_segs;
08adb7da 41 ssize_t err;
1da177e4
LT		 42
43 if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) ||
08adb7da 44 __get_user(uaddr, &umsg->msg_name) ||
1da177e4 45 __get_user(kmsg->msg_namelen, &umsg->msg_namelen) ||
08adb7da 46 __get_user(uiov, &umsg->msg_iov) ||
c0371da6 47 __get_user(nr_segs, &umsg->msg_iovlen) ||
1da177e4
LT		 48 __get_user(tmp3, &umsg->msg_control) ||
49 __get_user(kmsg->msg_controllen, &umsg->msg_controllen) ||
50 __get_user(kmsg->msg_flags, &umsg->msg_flags))
51 return -EFAULT;
91edd096
CM		 52
53 if (!uaddr)
54 kmsg->msg_namelen = 0;
55
56 if (kmsg->msg_namelen < 0)
57 return -EINVAL;
58
1661bf36 59 if (kmsg->msg_namelen > sizeof(struct sockaddr_storage))
db31c55a 60 kmsg->msg_namelen = sizeof(struct sockaddr_storage);
1da177e4 61 kmsg->msg_control = compat_ptr(tmp3);
1da177e4 62
08adb7da
AV		 63 if (save_addr)
64 *save_addr = compat_ptr(uaddr);
1da177e4 65
08adb7da
AV		 66 if (uaddr && kmsg->msg_namelen) {
67 if (!save_addr) {
68 err = move_addr_to_kernel(compat_ptr(uaddr),
69 kmsg->msg_namelen,
70 kmsg->msg_name);
e71a4783 71 if (err < 0)
1da177e4
LT		 72 return err;
73 }
40eea803 74 } else {
08adb7da
AV		 75 kmsg->msg_name = NULL;
76 kmsg->msg_namelen = 0;
40eea803 77 }
1da177e4 78
c0371da6 79 if (nr_segs > UIO_MAXIOV)
08449320
AV		 80 return -EMSGSIZE;
81
0345f931 82 kmsg->msg_iocb = NULL;
83
da184284
AV		 84 return compat_import_iovec(save_addr ? READ : WRITE,
85 compat_ptr(uiov), nr_segs,
86 UIO_FASTIOV, iov, &kmsg->msg_iter);
1da177e4
LT		 87}
88
89/* Bleech... */
90#define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32))
91
92#define CMSG_COMPAT_DATA(cmsg) \
93 ((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr))))
94#define CMSG_COMPAT_SPACE(len) \
95 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len))
96#define CMSG_COMPAT_LEN(len) \
97 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len))
98
99#define CMSG_COMPAT_FIRSTHDR(msg) \
100 (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \
101 (struct compat_cmsghdr __user *)((msg)->msg_control) : \
102 (struct compat_cmsghdr __user *)NULL)
103
104#define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \
105 ((ucmlen) >= sizeof(struct compat_cmsghdr) && \
106 (ucmlen) <= (unsigned long) \
107 ((mhdr)->msg_controllen - \
108 ((char *)(ucmsg) - (char *)(mhdr)->msg_control)))
109
110static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg,
111 struct compat_cmsghdr __user *cmsg, int cmsg_len)
112{
113 char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len);
114 if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) >
115 msg->msg_controllen)
116 return NULL;
117 return (struct compat_cmsghdr __user *)ptr;
118}
119
120/* There is a lot of hair here because the alignment rules (and
121 * thus placement) of cmsg headers and length are different for
122 * 32-bit apps. -DaveM
123 */
8920e8f9 124int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk,
1da177e4
LT		 125 unsigned char *stackbuf, int stackbuf_size)
126{
127 struct compat_cmsghdr __user *ucmsg;
128 struct cmsghdr *kcmsg, *kcmsg_base;
129 compat_size_t ucmlen;
130 __kernel_size_t kcmlen, tmp;
8920e8f9 131 int err = -EFAULT;
1da177e4
LT		 132
133 kcmlen = 0;
134 kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf;
135 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
e71a4783
SH		 136 while (ucmsg != NULL) {
137 if (get_user(ucmlen, &ucmsg->cmsg_len))
1da177e4
LT		 138 return -EFAULT;
139
140 /* Catch bogons. */
141 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
142 return -EINVAL;
143
144 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
145 CMSG_ALIGN(sizeof(struct cmsghdr)));
8920e8f9 146 tmp = CMSG_ALIGN(tmp);
1da177e4
LT		 147 kcmlen += tmp;
148 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
149 }
e71a4783 150 if (kcmlen == 0)
1da177e4
LT		 151 return -EINVAL;
152
153 /* The kcmlen holds the 64-bit version of the control length.
154 * It may not be modified as we do not stick it into the kmsg
155 * until we have successfully copied over all of the data
156 * from the user.
157 */
8920e8f9
AV		 158 if (kcmlen > stackbuf_size)
159 kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL);
160 if (kcmsg == NULL)
1da177e4
LT		 161 return -ENOBUFS;
162
163 /* Now copy them over neatly. */
164 memset(kcmsg, 0, kcmlen);
165 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
e71a4783 166 while (ucmsg != NULL) {
8920e8f9
AV		 167 if (__get_user(ucmlen, &ucmsg->cmsg_len))
168 goto Efault;
169 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
170 goto Einval;
1da177e4
LT		 171 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
172 CMSG_ALIGN(sizeof(struct cmsghdr)));
8920e8f9
AV		 173 if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp))
174 goto Einval;
1da177e4 175 kcmsg->cmsg_len = tmp;
8920e8f9
AV		 176 tmp = CMSG_ALIGN(tmp);
177 if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) ||
178 __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) ||
179 copy_from_user(CMSG_DATA(kcmsg),
180 CMSG_COMPAT_DATA(ucmsg),
181 (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg)))))
182 goto Efault;
1da177e4
LT		 183
184 /* Advance. */
8920e8f9 185 kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp);
1da177e4
LT		 186 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
187 }
188
189 /* Ok, looks like we made it. Hook it up and return success. */
190 kmsg->msg_control = kcmsg_base;
191 kmsg->msg_controllen = kcmlen;
192 return 0;
193
8920e8f9
AV		 194Einval:
195 err = -EINVAL;
196Efault:
197 if (kcmsg_base != (struct cmsghdr *)stackbuf)
198 sock_kfree_s(sk, kcmsg_base, kcmlen);
199 return err;
1da177e4
LT		 200}
201
202int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data)
203{
1da177e4
LT		 204 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
205 struct compat_cmsghdr cmhdr;
81881047
JJ		 206 struct compat_timeval ctv;
207 struct compat_timespec cts[3];
1da177e4
LT		 208 int cmlen;
209
e71a4783 210 if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) {
1da177e4
LT		 211 kmsg->msg_flags |= MSG_CTRUNC;
212 return 0; /* XXX: return error? check spec. */
213 }
214
ee4fa23c 215 if (!COMPAT_USE_64BIT_TIME) {
ee4fa23c
L		 216 if (level == SOL_SOCKET && type == SCM_TIMESTAMP) {
217 struct timeval *tv = (struct timeval *)data;
218 ctv.tv_sec = tv->tv_sec;
219 ctv.tv_usec = tv->tv_usec;
220 data = &ctv;
221 len = sizeof(ctv);
222 }
223 if (level == SOL_SOCKET &&
224 (type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) {
225 int count = type == SCM_TIMESTAMPNS ? 1 : 3;
226 int i;
227 struct timespec *ts = (struct timespec *)data;
228 for (i = 0; i < count; i++) {
229 cts[i].tv_sec = ts[i].tv_sec;
230 cts[i].tv_nsec = ts[i].tv_nsec;
231 }
232 data = &cts;
233 len = sizeof(cts[0]) * count;
20d49473 234 }
4768fbcb
YH		 235 }
236
1da177e4 237 cmlen = CMSG_COMPAT_LEN(len);
e71a4783 238 if (kmsg->msg_controllen < cmlen) {
1da177e4
LT		 239 kmsg->msg_flags |= MSG_CTRUNC;
240 cmlen = kmsg->msg_controllen;
241 }
242 cmhdr.cmsg_level = level;
243 cmhdr.cmsg_type = type;
244 cmhdr.cmsg_len = cmlen;
245
e71a4783 246 if (copy_to_user(cm, &cmhdr, sizeof cmhdr))
1da177e4 247 return -EFAULT;
e71a4783 248 if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr)))
1da177e4
LT		 249 return -EFAULT;
250 cmlen = CMSG_COMPAT_SPACE(len);
1ac70e7a
WY		 251 if (kmsg->msg_controllen < cmlen)
252 cmlen = kmsg->msg_controllen;
1da177e4
LT		 253 kmsg->msg_control += cmlen;
254 kmsg->msg_controllen -= cmlen;
255 return 0;
256}
257
258void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm)
259{
260 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
261 int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int);
262 int fdnum = scm->fp->count;
263 struct file **fp = scm->fp->fp;
264 int __user *cmfptr;
265 int err = 0, i;
266
267 if (fdnum < fdmax)
268 fdmax = fdnum;
269
270 for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) {
271 int new_fd;
272 err = security_file_receive(fp[i]);
273 if (err)
274 break;
4a19542e
UD		 275 err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags
276 ? O_CLOEXEC : 0);
1da177e4
LT		 277 if (err < 0)
278 break;
279 new_fd = err;
280 err = put_user(new_fd, cmfptr);
281 if (err) {
282 put_unused_fd(new_fd);
283 break;
284 }
285 /* Bump the usage count and install the file. */
cb0942b8 286 fd_install(new_fd, get_file(fp[i]));
1da177e4
LT		 287 }
288
289 if (i > 0) {
290 int cmlen = CMSG_COMPAT_LEN(i * sizeof(int));
effee6a0 291 err = put_user(SOL_SOCKET, &cm->cmsg_level);
1da177e4
LT		 292 if (!err)
293 err = put_user(SCM_RIGHTS, &cm->cmsg_type);
294 if (!err)
295 err = put_user(cmlen, &cm->cmsg_len);
296 if (!err) {
297 cmlen = CMSG_COMPAT_SPACE(i * sizeof(int));
298 kmsg->msg_control += cmlen;
299 kmsg->msg_controllen -= cmlen;
300 }
301 }
302 if (i < fdnum)
303 kmsg->msg_flags |= MSG_CTRUNC;
304
305 /*
306 * All of the files that fit in the message have had their
307 * usage counts incremented, so we just free the list.
308 */
309 __scm_destroy(scm);
310}
311
3fdadf7d 312static int do_set_attach_filter(struct socket *sock, int level, int optname,
b7058842 313 char __user *optval, unsigned int optlen)
1da177e4
LT		 314{
315 struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval;
4768fbcb 316 struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog));
1da177e4
LT		 317 compat_uptr_t ptr;
318 u16 len;
319
320 if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) ||
321 !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) ||
322 __get_user(len, &fprog32->len) ||
323 __get_user(ptr, &fprog32->filter) ||
324 __put_user(len, &kfprog->len) ||
325 __put_user(compat_ptr(ptr), &kfprog->filter))
326 return -EFAULT;
327
3fdadf7d 328 return sock_setsockopt(sock, level, optname, (char __user *)kfprog,
1da177e4
LT		 329 sizeof(struct sock_fprog));
330}
331
3fdadf7d 332static int do_set_sock_timeout(struct socket *sock, int level,
b7058842 333 int optname, char __user *optval, unsigned int optlen)
1da177e4 334{
c6d409cf 335 struct compat_timeval __user *up = (struct compat_timeval __user *)optval;
1da177e4
LT		 336 struct timeval ktime;
337 mm_segment_t old_fs;
338 int err;
339
340 if (optlen < sizeof(*up))
341 return -EINVAL;
342 if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
343 __get_user(ktime.tv_sec, &up->tv_sec) ||
344 __get_user(ktime.tv_usec, &up->tv_usec))
345 return -EFAULT;
346 old_fs = get_fs();
347 set_fs(KERNEL_DS);
c6d409cf 348 err = sock_setsockopt(sock, level, optname, (char *)&ktime, sizeof(ktime));
1da177e4
LT		 349 set_fs(old_fs);
350
351 return err;
352}
353
3fdadf7d 354static int compat_sock_setsockopt(struct socket *sock, int level, int optname,
b7058842 355 char __user *optval, unsigned int optlen)
3fdadf7d
DM		 356{
357 if (optname == SO_ATTACH_FILTER)
358 return do_set_attach_filter(sock, level, optname,
359 optval, optlen);
360 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
361 return do_set_sock_timeout(sock, level, optname, optval, optlen);
362
363 return sock_setsockopt(sock, level, optname, optval, optlen);
364}
365
361d93c4
HC		 366COMPAT_SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname,
367 char __user *, optval, unsigned int, optlen)
1da177e4 368{
3fdadf7d 369 int err;
c6d409cf 370 struct socket *sock = sockfd_lookup(fd, &err);
3fdadf7d 371
c6d409cf
ED		 372 if (sock) {
373 err = security_socket_setsockopt(sock, level, optname);
3fdadf7d
DM		 374 if (err) {
375 sockfd_put(sock);
376 return err;
377 }
378
379 if (level == SOL_SOCKET)
380 err = compat_sock_setsockopt(sock, level,
381 optname, optval, optlen);
382 else if (sock->ops->compat_setsockopt)
383 err = sock->ops->compat_setsockopt(sock, level,
384 optname, optval, optlen);
385 else
386 err = sock->ops->setsockopt(sock, level,
387 optname, optval, optlen);
388 sockfd_put(sock);
389 }
390 return err;
1da177e4
LT		 391}
392
3fdadf7d 393static int do_get_sock_timeout(struct socket *sock, int level, int optname,
1da177e4
LT		 394 char __user *optval, int __user *optlen)
395{
396 struct compat_timeval __user *up;
397 struct timeval ktime;
398 mm_segment_t old_fs;
399 int len, err;
400
401 up = (struct compat_timeval __user *) optval;
402 if (get_user(len, optlen))
403 return -EFAULT;
404 if (len < sizeof(*up))
405 return -EINVAL;
406 len = sizeof(ktime);
407 old_fs = get_fs();
408 set_fs(KERNEL_DS);
3fdadf7d 409 err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len);
1da177e4
LT		 410 set_fs(old_fs);
411
412 if (!err) {
413 if (put_user(sizeof(*up), optlen) ||
414 !access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
415 __put_user(ktime.tv_sec, &up->tv_sec) ||
416 __put_user(ktime.tv_usec, &up->tv_usec))
417 err = -EFAULT;
418 }
419 return err;
420}
421
3fdadf7d 422static int compat_sock_getsockopt(struct socket *sock, int level, int optname,
1da177e4
LT		 423 char __user *optval, int __user *optlen)
424{
3fdadf7d
DM		 425 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
426 return do_get_sock_timeout(sock, level, optname, optval, optlen);
427 return sock_getsockopt(sock, level, optname, optval, optlen);
1da177e4
LT		 428}
429
f0ac2614
SP		 430int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp)
431{
ee4fa23c
L		 432 struct compat_timeval __user *ctv;
433 int err;
b7aa0bf7 434 struct timeval tv;
f0ac2614 435
ee4fa23c
L		 436 if (COMPAT_USE_64BIT_TIME)
437 return sock_get_timestamp(sk, userstamp);
438
439 ctv = (struct compat_timeval __user *) userstamp;
440 err = -ENOENT;
f0ac2614 441 if (!sock_flag(sk, SOCK_TIMESTAMP))
20d49473 442 sock_enable_timestamp(sk, SOCK_TIMESTAMP);
b7aa0bf7
ED		 443 tv = ktime_to_timeval(sk->sk_stamp);
444 if (tv.tv_sec == -1)
f0ac2614 445 return err;
b7aa0bf7
ED		 446 if (tv.tv_sec == 0) {
447 sk->sk_stamp = ktime_get_real();
448 tv = ktime_to_timeval(sk->sk_stamp);
449 }
450 err = 0;
451 if (put_user(tv.tv_sec, &ctv->tv_sec) ||
452 put_user(tv.tv_usec, &ctv->tv_usec))
f0ac2614
SP		 453 err = -EFAULT;
454 return err;
455}
456EXPORT_SYMBOL(compat_sock_get_timestamp);
457
ae40eb1e
ED		 458int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp)
459{
ee4fa23c
L		 460 struct compat_timespec __user *ctv;
461 int err;
ae40eb1e
ED		 462 struct timespec ts;
463
ee4fa23c
L		 464 if (COMPAT_USE_64BIT_TIME)
465 return sock_get_timestampns (sk, userstamp);
466
467 ctv = (struct compat_timespec __user *) userstamp;
468 err = -ENOENT;
ae40eb1e 469 if (!sock_flag(sk, SOCK_TIMESTAMP))
20d49473 470 sock_enable_timestamp(sk, SOCK_TIMESTAMP);
ae40eb1e
ED		 471 ts = ktime_to_timespec(sk->sk_stamp);
472 if (ts.tv_sec == -1)
473 return err;
474 if (ts.tv_sec == 0) {
475 sk->sk_stamp = ktime_get_real();
476 ts = ktime_to_timespec(sk->sk_stamp);
477 }
478 err = 0;
479 if (put_user(ts.tv_sec, &ctv->tv_sec) ||
480 put_user(ts.tv_nsec, &ctv->tv_nsec))
481 err = -EFAULT;
482 return err;
483}
484EXPORT_SYMBOL(compat_sock_get_timestampns);
485
361d93c4
HC		 486COMPAT_SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname,
487 char __user *, optval, int __user *, optlen)
3fdadf7d
DM		 488{
489 int err;
c6d409cf 490 struct socket *sock = sockfd_lookup(fd, &err);
3fdadf7d 491
c6d409cf
ED		 492 if (sock) {
493 err = security_socket_getsockopt(sock, level, optname);
3fdadf7d
DM		 494 if (err) {
495 sockfd_put(sock);
496 return err;
497 }
498
499 if (level == SOL_SOCKET)
500 err = compat_sock_getsockopt(sock, level,
501 optname, optval, optlen);
502 else if (sock->ops->compat_getsockopt)
503 err = sock->ops->compat_getsockopt(sock, level,
504 optname, optval, optlen);
505 else
506 err = sock->ops->getsockopt(sock, level,
507 optname, optval, optlen);
508 sockfd_put(sock);
509 }
510 return err;
511}
dae50295
DS		 512
513struct compat_group_req {
514 __u32 gr_interface;
515 struct __kernel_sockaddr_storage gr_group
e099b2d9 516 __aligned(4);
bc10502d 517} __packed;
dae50295
DS		 518
519struct compat_group_source_req {
520 __u32 gsr_interface;
521 struct __kernel_sockaddr_storage gsr_group
e099b2d9 522 __aligned(4);
dae50295 523 struct __kernel_sockaddr_storage gsr_source
e099b2d9 524 __aligned(4);
bc10502d 525} __packed;
dae50295
DS		 526
527struct compat_group_filter {
528 __u32 gf_interface;
529 struct __kernel_sockaddr_storage gf_group
e099b2d9 530 __aligned(4);
dae50295
DS		 531 __u32 gf_fmode;
532 __u32 gf_numsrc;
533 struct __kernel_sockaddr_storage gf_slist[1]
e099b2d9 534 __aligned(4);
bc10502d 535} __packed;
dae50295 536
be666e0a
DS		 537#define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \
538 sizeof(struct __kernel_sockaddr_storage))
539
dae50295
DS		 540
541int compat_mc_setsockopt(struct sock *sock, int level, int optname,
b7058842 542 char __user *optval, unsigned int optlen,
c6d409cf 543 int (*setsockopt)(struct sock *, int, int, char __user *, unsigned int))
dae50295
DS		 544{
545 char __user *koptval = optval;
546 int koptlen = optlen;
547
548 switch (optname) {
549 case MCAST_JOIN_GROUP:
550 case MCAST_LEAVE_GROUP:
551 {
552 struct compat_group_req __user *gr32 = (void *)optval;
553 struct group_req __user *kgr =
554 compat_alloc_user_space(sizeof(struct group_req));
555 u32 interface;
556
557 if (!access_ok(VERIFY_READ, gr32, sizeof(*gr32)) ||
558 !access_ok(VERIFY_WRITE, kgr, sizeof(struct group_req)) ||
559 __get_user(interface, &gr32->gr_interface) ||
560 __put_user(interface, &kgr->gr_interface) ||
561 copy_in_user(&kgr->gr_group, &gr32->gr_group,
562 sizeof(kgr->gr_group)))
563 return -EFAULT;
564 koptval = (char __user *)kgr;
565 koptlen = sizeof(struct group_req);
566 break;
567 }
568 case MCAST_JOIN_SOURCE_GROUP:
569 case MCAST_LEAVE_SOURCE_GROUP:
570 case MCAST_BLOCK_SOURCE:
571 case MCAST_UNBLOCK_SOURCE:
572 {
573 struct compat_group_source_req __user *gsr32 = (void *)optval;
be666e0a 574 struct group_source_req __user *kgsr = compat_alloc_user_space(
dae50295
DS		 575 sizeof(struct group_source_req));
576 u32 interface;
577
578 if (!access_ok(VERIFY_READ, gsr32, sizeof(*gsr32)) ||
579 !access_ok(VERIFY_WRITE, kgsr,
580 sizeof(struct group_source_req)) ||
581 __get_user(interface, &gsr32->gsr_interface) ||
582 __put_user(interface, &kgsr->gsr_interface) ||
583 copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group,
584 sizeof(kgsr->gsr_group)) ||
585 copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source,
586 sizeof(kgsr->gsr_source)))
587 return -EFAULT;
588 koptval = (char __user *)kgsr;
589 koptlen = sizeof(struct group_source_req);
590 break;
591 }
592 case MCAST_MSFILTER:
593 {
594 struct compat_group_filter __user *gf32 = (void *)optval;
be666e0a 595 struct group_filter __user *kgf;
dae50295
DS		 596 u32 interface, fmode, numsrc;
597
be666e0a 598 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) ||
dae50295
DS		 599 __get_user(interface, &gf32->gf_interface) ||
600 __get_user(fmode, &gf32->gf_fmode) ||
601 __get_user(numsrc, &gf32->gf_numsrc))
602 return -EFAULT;
603 koptlen = optlen + sizeof(struct group_filter) -
604 sizeof(struct compat_group_filter);
605 if (koptlen < GROUP_FILTER_SIZE(numsrc))
606 return -EINVAL;
607 kgf = compat_alloc_user_space(koptlen);
608 if (!access_ok(VERIFY_WRITE, kgf, koptlen) ||
609 __put_user(interface, &kgf->gf_interface) ||
610 __put_user(fmode, &kgf->gf_fmode) ||
611 __put_user(numsrc, &kgf->gf_numsrc) ||
612 copy_in_user(&kgf->gf_group, &gf32->gf_group,
613 sizeof(kgf->gf_group)) ||
be666e0a 614 (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist,
dae50295
DS		 615 numsrc * sizeof(kgf->gf_slist[0]))))
616 return -EFAULT;
617 koptval = (char __user *)kgf;
618 break;
619 }
620
621 default:
622 break;
623 }
624 return setsockopt(sock, level, optname, koptval, koptlen);
625}
dae50295
DS		 626EXPORT_SYMBOL(compat_mc_setsockopt);
627
42908c69
DS		 628int compat_mc_getsockopt(struct sock *sock, int level, int optname,
629 char __user *optval, int __user *optlen,
c6d409cf 630 int (*getsockopt)(struct sock *, int, int, char __user *, int __user *))
42908c69
DS		 631{
632 struct compat_group_filter __user *gf32 = (void *)optval;
633 struct group_filter __user *kgf;
634 int __user *koptlen;
635 u32 interface, fmode, numsrc;
636 int klen, ulen, err;
637
638 if (optname != MCAST_MSFILTER)
639 return getsockopt(sock, level, optname, optval, optlen);
640
641 koptlen = compat_alloc_user_space(sizeof(*koptlen));
642 if (!access_ok(VERIFY_READ, optlen, sizeof(*optlen)) ||
643 __get_user(ulen, optlen))
644 return -EFAULT;
645
646 /* adjust len for pad */
647 klen = ulen + sizeof(*kgf) - sizeof(*gf32);
648
649 if (klen < GROUP_FILTER_SIZE(0))
650 return -EINVAL;
651
652 if (!access_ok(VERIFY_WRITE, koptlen, sizeof(*koptlen)) ||
653 __put_user(klen, koptlen))
654 return -EFAULT;
655
656 /* have to allow space for previous compat_alloc_user_space, too */
657 kgf = compat_alloc_user_space(klen+sizeof(*optlen));
658
659 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) ||
660 __get_user(interface, &gf32->gf_interface) ||
661 __get_user(fmode, &gf32->gf_fmode) ||
662 __get_user(numsrc, &gf32->gf_numsrc) ||
663 __put_user(interface, &kgf->gf_interface) ||
664 __put_user(fmode, &kgf->gf_fmode) ||
665 __put_user(numsrc, &kgf->gf_numsrc) ||
c6d409cf 666 copy_in_user(&kgf->gf_group, &gf32->gf_group, sizeof(kgf->gf_group)))
42908c69
DS		 667 return -EFAULT;
668
669 err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen);
670 if (err)
671 return err;
672
673 if (!access_ok(VERIFY_READ, koptlen, sizeof(*koptlen)) ||
674 __get_user(klen, koptlen))
675 return -EFAULT;
676
677 ulen = klen - (sizeof(*kgf)-sizeof(*gf32));
678
679 if (!access_ok(VERIFY_WRITE, optlen, sizeof(*optlen)) ||
680 __put_user(ulen, optlen))
681 return -EFAULT;
682
683 if (!access_ok(VERIFY_READ, kgf, klen) ||
684 !access_ok(VERIFY_WRITE, gf32, ulen) ||
685 __get_user(interface, &kgf->gf_interface) ||
686 __get_user(fmode, &kgf->gf_fmode) ||
687 __get_user(numsrc, &kgf->gf_numsrc) ||
688 __put_user(interface, &gf32->gf_interface) ||
689 __put_user(fmode, &gf32->gf_fmode) ||
690 __put_user(numsrc, &gf32->gf_numsrc))
691 return -EFAULT;
692 if (numsrc) {
693 int copylen;
694
695 klen -= GROUP_FILTER_SIZE(0);
696 copylen = numsrc * sizeof(gf32->gf_slist[0]);
697 if (copylen > klen)
698 copylen = klen;
c6d409cf 699 if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen))
42908c69
DS		 700 return -EFAULT;
701 }
702 return err;
703}
42908c69
DS		 704EXPORT_SYMBOL(compat_mc_getsockopt);
705
dae50295 706
1da177e4
LT		 707/* Argument list sizes for compat_sys_socketcall */
708#define AL(x) ((x) * sizeof(u32))
228e548e 709static unsigned char nas[21] = {
c6d409cf
ED		 710 AL(0), AL(3), AL(3), AL(3), AL(2), AL(3),
711 AL(3), AL(3), AL(4), AL(4), AL(4), AL(6),
712 AL(6), AL(2), AL(5), AL(5), AL(3), AL(3),
228e548e 713 AL(4), AL(5), AL(4)
c6d409cf 714};
1da177e4
LT		 715#undef AL
716
361d93c4 717COMPAT_SYSCALL_DEFINE3(sendmsg, int, fd, struct compat_msghdr __user *, msg, unsigned int, flags)
1da177e4 718{
666547ff 719 return __sys_sendmsg(fd, (struct user_msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
1da177e4
LT		 720}
721
361d93c4
HC		 722COMPAT_SYSCALL_DEFINE4(sendmmsg, int, fd, struct compat_mmsghdr __user *, mmsg,
723 unsigned int, vlen, unsigned int, flags)
228e548e
AB		 724{
725 return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
726 flags | MSG_CMSG_COMPAT);
727}
728
361d93c4 729COMPAT_SYSCALL_DEFINE3(recvmsg, int, fd, struct compat_msghdr __user *, msg, unsigned int, flags)
1da177e4 730{
666547ff 731 return __sys_recvmsg(fd, (struct user_msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
1da177e4
LT		 732}
733
3a49a0f7 734COMPAT_SYSCALL_DEFINE4(recv, int, fd, void __user *, buf, compat_size_t, len, unsigned int, flags)
1dacc76d
JB		 735{
736 return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT);
737}
738
3a49a0f7
HC		 739COMPAT_SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, buf, compat_size_t, len,
740 unsigned int, flags, struct sockaddr __user *, addr,
741 int __user *, addrlen)
1dacc76d
JB		 742{
743 return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen);
744}
745
361d93c4
HC		 746COMPAT_SYSCALL_DEFINE5(recvmmsg, int, fd, struct compat_mmsghdr __user *, mmsg,
747 unsigned int, vlen, unsigned int, flags,
748 struct compat_timespec __user *, timeout)
a2e27255
ACM		 749{
750 int datagrams;
751 struct timespec ktspec;
a2e27255 752
5b23136b
JMG		 753 if (timeout == NULL)
754 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
755 flags | MSG_CMSG_COMPAT, NULL);
756
2def2ef2 757 if (compat_get_timespec(&ktspec, timeout))
a2e27255
ACM		 758 return -EFAULT;
759
760 datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
761 flags | MSG_CMSG_COMPAT, &ktspec);
2def2ef2 762 if (datagrams > 0 && compat_put_timespec(&ktspec, timeout))
a2e27255
ACM		 763 datagrams = -EFAULT;
764
765 return datagrams;
766}
767
361d93c4 768COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user *, args)
1da177e4
LT		 769{
770 int ret;
771 u32 a[6];
772 u32 a0, a1;
4768fbcb 773
228e548e 774 if (call < SYS_SOCKET || call > SYS_SENDMMSG)
1da177e4
LT		 775 return -EINVAL;
776 if (copy_from_user(a, args, nas[call]))
777 return -EFAULT;
778 a0 = a[0];
779 a1 = a[1];
4768fbcb 780
e71a4783 781 switch (call) {
1da177e4
LT		 782 case SYS_SOCKET:
783 ret = sys_socket(a0, a1, a[2]);
784 break;
785 case SYS_BIND:
786 ret = sys_bind(a0, compat_ptr(a1), a[2]);
787 break;
788 case SYS_CONNECT:
789 ret = sys_connect(a0, compat_ptr(a1), a[2]);
790 break;
791 case SYS_LISTEN:
792 ret = sys_listen(a0, a1);
793 break;
794 case SYS_ACCEPT:
de11defe 795 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0);
1da177e4
LT		 796 break;
797 case SYS_GETSOCKNAME:
798 ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
799 break;
800 case SYS_GETPEERNAME:
801 ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2]));
802 break;
803 case SYS_SOCKETPAIR:
804 ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3]));
805 break;
806 case SYS_SEND:
807 ret = sys_send(a0, compat_ptr(a1), a[2], a[3]);
808 break;
809 case SYS_SENDTO:
810 ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]);
811 break;
812 case SYS_RECV:
1dacc76d 813 ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]);
1da177e4
LT		 814 break;
815 case SYS_RECVFROM:
1dacc76d
JB		 816 ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3],
817 compat_ptr(a[4]), compat_ptr(a[5]));
1da177e4
LT		 818 break;
819 case SYS_SHUTDOWN:
c6d409cf 820 ret = sys_shutdown(a0, a1);
1da177e4
LT		 821 break;
822 case SYS_SETSOCKOPT:
823 ret = compat_sys_setsockopt(a0, a1, a[2],
824 compat_ptr(a[3]), a[4]);
825 break;
826 case SYS_GETSOCKOPT:
827 ret = compat_sys_getsockopt(a0, a1, a[2],
828 compat_ptr(a[3]), compat_ptr(a[4]));
829 break;
830 case SYS_SENDMSG:
831 ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
832 break;
228e548e
AB		 833 case SYS_SENDMMSG:
834 ret = compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]);
835 break;
1da177e4
LT		 836 case SYS_RECVMSG:
837 ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);
838 break;
a2e27255
ACM		 839 case SYS_RECVMMSG:
840 ret = compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3],
841 compat_ptr(a[4]));
842 break;
de11defe
UD		 843 case SYS_ACCEPT4:
844 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]);
aaca0bdc 845 break;
1da177e4
LT		 846 default:
847 ret = -EINVAL;
848 break;
849 }
850 return ret;
851}