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Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[linux/fpc-iii.git] / net / compat.c
blobf50161fb812eace2eb659ae78bf12062c608b5b6
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
34 static 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
61 int 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. */
83 int 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
131 static 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 */
145 int 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
215 Einval:
216 err = -EINVAL;
217 Efault:
218 if (kcmsg_base != (struct cmsghdr *)stackbuf)
219 sock_kfree_s(sk, kcmsg_base, kcmlen);
220 return err;
221 }
222
223 int 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
279 void 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
333 static 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
353 static 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
375 static 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
387 asmlinkage long compat_sys_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
414 static 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
443 static 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
451 int 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 }
477 EXPORT_SYMBOL(compat_sock_get_timestamp);
478
479 int 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 }
505 EXPORT_SYMBOL(compat_sock_get_timestampns);
506
507 asmlinkage long compat_sys_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
534 struct compat_group_req {
535 __u32 gr_interface;
536 struct __kernel_sockaddr_storage gr_group
537 __attribute__ ((aligned(4)));
538 } __packed;
539
540 struct 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
548 struct 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
562 int 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 }
647 EXPORT_SYMBOL(compat_mc_setsockopt);
648
649 int 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 }
725 EXPORT_SYMBOL(compat_mc_getsockopt);
726
727
728 /* Argument list sizes for compat_sys_socketcall */
729 #define AL(x) ((x) * sizeof(u32))
730 static 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
738 asmlinkage long compat_sys_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
745 asmlinkage long compat_sys_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
754 asmlinkage long compat_sys_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
761 asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len, unsigned int flags)
762 {
763 return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT);
764 }
765
766 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, 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
773 asmlinkage long compat_sys_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
798 asmlinkage long compat_sys_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 }
Linux with added FPC-III support