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Linux 3.12.28
[linux/fpc-iii.git] / net / compat.c
blobcbc1a2a265876277848f0a697040cea3db75b7d7
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_name && 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 kern_msg->msg_name = kern_address;
97 } else {
98 kern_msg->msg_name = NULL;
99 kern_msg->msg_namelen = 0;
100 }
101
102 tot_len = iov_from_user_compat_to_kern(kern_iov,
103 (struct compat_iovec __user *)kern_msg->msg_iov,
104 kern_msg->msg_iovlen);
105 if (tot_len >= 0)
106 kern_msg->msg_iov = kern_iov;
107
108 return tot_len;
109 }
110
111 /* Bleech... */
112 #define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32))
113
114 #define CMSG_COMPAT_DATA(cmsg) \
115 ((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr))))
116 #define CMSG_COMPAT_SPACE(len) \
117 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len))
118 #define CMSG_COMPAT_LEN(len) \
119 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len))
120
121 #define CMSG_COMPAT_FIRSTHDR(msg) \
122 (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \
123 (struct compat_cmsghdr __user *)((msg)->msg_control) : \
124 (struct compat_cmsghdr __user *)NULL)
125
126 #define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \
127 ((ucmlen) >= sizeof(struct compat_cmsghdr) && \
128 (ucmlen) <= (unsigned long) \
129 ((mhdr)->msg_controllen - \
130 ((char *)(ucmsg) - (char *)(mhdr)->msg_control)))
131
132 static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg,
133 struct compat_cmsghdr __user *cmsg, int cmsg_len)
134 {
135 char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len);
136 if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) >
137 msg->msg_controllen)
138 return NULL;
139 return (struct compat_cmsghdr __user *)ptr;
140 }
141
142 /* There is a lot of hair here because the alignment rules (and
143 * thus placement) of cmsg headers and length are different for
144 * 32-bit apps. -DaveM
145 */
146 int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk,
147 unsigned char *stackbuf, int stackbuf_size)
148 {
149 struct compat_cmsghdr __user *ucmsg;
150 struct cmsghdr *kcmsg, *kcmsg_base;
151 compat_size_t ucmlen;
152 __kernel_size_t kcmlen, tmp;
153 int err = -EFAULT;
154
155 kcmlen = 0;
156 kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf;
157 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
158 while (ucmsg != NULL) {
159 if (get_user(ucmlen, &ucmsg->cmsg_len))
160 return -EFAULT;
161
162 /* Catch bogons. */
163 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
164 return -EINVAL;
165
166 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
167 CMSG_ALIGN(sizeof(struct cmsghdr)));
168 tmp = CMSG_ALIGN(tmp);
169 kcmlen += tmp;
170 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
171 }
172 if (kcmlen == 0)
173 return -EINVAL;
174
175 /* The kcmlen holds the 64-bit version of the control length.
176 * It may not be modified as we do not stick it into the kmsg
177 * until we have successfully copied over all of the data
178 * from the user.
179 */
180 if (kcmlen > stackbuf_size)
181 kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL);
182 if (kcmsg == NULL)
183 return -ENOBUFS;
184
185 /* Now copy them over neatly. */
186 memset(kcmsg, 0, kcmlen);
187 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
188 while (ucmsg != NULL) {
189 if (__get_user(ucmlen, &ucmsg->cmsg_len))
190 goto Efault;
191 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
192 goto Einval;
193 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
194 CMSG_ALIGN(sizeof(struct cmsghdr)));
195 if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp))
196 goto Einval;
197 kcmsg->cmsg_len = tmp;
198 tmp = CMSG_ALIGN(tmp);
199 if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) ||
200 __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) ||
201 copy_from_user(CMSG_DATA(kcmsg),
202 CMSG_COMPAT_DATA(ucmsg),
203 (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg)))))
204 goto Efault;
205
206 /* Advance. */
207 kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp);
208 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
209 }
210
211 /* Ok, looks like we made it. Hook it up and return success. */
212 kmsg->msg_control = kcmsg_base;
213 kmsg->msg_controllen = kcmlen;
214 return 0;
215
216 Einval:
217 err = -EINVAL;
218 Efault:
219 if (kcmsg_base != (struct cmsghdr *)stackbuf)
220 sock_kfree_s(sk, kcmsg_base, kcmlen);
221 return err;
222 }
223
224 int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data)
225 {
226 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
227 struct compat_cmsghdr cmhdr;
228 struct compat_timeval ctv;
229 struct compat_timespec cts[3];
230 int cmlen;
231
232 if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) {
233 kmsg->msg_flags |= MSG_CTRUNC;
234 return 0; /* XXX: return error? check spec. */
235 }
236
237 if (!COMPAT_USE_64BIT_TIME) {
238 if (level == SOL_SOCKET && type == SCM_TIMESTAMP) {
239 struct timeval *tv = (struct timeval *)data;
240 ctv.tv_sec = tv->tv_sec;
241 ctv.tv_usec = tv->tv_usec;
242 data = &ctv;
243 len = sizeof(ctv);
244 }
245 if (level == SOL_SOCKET &&
246 (type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) {
247 int count = type == SCM_TIMESTAMPNS ? 1 : 3;
248 int i;
249 struct timespec *ts = (struct timespec *)data;
250 for (i = 0; i < count; i++) {
251 cts[i].tv_sec = ts[i].tv_sec;
252 cts[i].tv_nsec = ts[i].tv_nsec;
253 }
254 data = &cts;
255 len = sizeof(cts[0]) * count;
256 }
257 }
258
259 cmlen = CMSG_COMPAT_LEN(len);
260 if (kmsg->msg_controllen < cmlen) {
261 kmsg->msg_flags |= MSG_CTRUNC;
262 cmlen = kmsg->msg_controllen;
263 }
264 cmhdr.cmsg_level = level;
265 cmhdr.cmsg_type = type;
266 cmhdr.cmsg_len = cmlen;
267
268 if (copy_to_user(cm, &cmhdr, sizeof cmhdr))
269 return -EFAULT;
270 if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr)))
271 return -EFAULT;
272 cmlen = CMSG_COMPAT_SPACE(len);
273 if (kmsg->msg_controllen < cmlen)
274 cmlen = kmsg->msg_controllen;
275 kmsg->msg_control += cmlen;
276 kmsg->msg_controllen -= cmlen;
277 return 0;
278 }
279
280 void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm)
281 {
282 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
283 int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int);
284 int fdnum = scm->fp->count;
285 struct file **fp = scm->fp->fp;
286 int __user *cmfptr;
287 int err = 0, i;
288
289 if (fdnum < fdmax)
290 fdmax = fdnum;
291
292 for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) {
293 int new_fd;
294 err = security_file_receive(fp[i]);
295 if (err)
296 break;
297 err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags
298 ? O_CLOEXEC : 0);
299 if (err < 0)
300 break;
301 new_fd = err;
302 err = put_user(new_fd, cmfptr);
303 if (err) {
304 put_unused_fd(new_fd);
305 break;
306 }
307 /* Bump the usage count and install the file. */
308 fd_install(new_fd, get_file(fp[i]));
309 }
310
311 if (i > 0) {
312 int cmlen = CMSG_COMPAT_LEN(i * sizeof(int));
313 err = put_user(SOL_SOCKET, &cm->cmsg_level);
314 if (!err)
315 err = put_user(SCM_RIGHTS, &cm->cmsg_type);
316 if (!err)
317 err = put_user(cmlen, &cm->cmsg_len);
318 if (!err) {
319 cmlen = CMSG_COMPAT_SPACE(i * sizeof(int));
320 kmsg->msg_control += cmlen;
321 kmsg->msg_controllen -= cmlen;
322 }
323 }
324 if (i < fdnum)
325 kmsg->msg_flags |= MSG_CTRUNC;
326
327 /*
328 * All of the files that fit in the message have had their
329 * usage counts incremented, so we just free the list.
330 */
331 __scm_destroy(scm);
332 }
333
334 static int do_set_attach_filter(struct socket *sock, int level, int optname,
335 char __user *optval, unsigned int optlen)
336 {
337 struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval;
338 struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog));
339 compat_uptr_t ptr;
340 u16 len;
341
342 if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) ||
343 !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) ||
344 __get_user(len, &fprog32->len) ||
345 __get_user(ptr, &fprog32->filter) ||
346 __put_user(len, &kfprog->len) ||
347 __put_user(compat_ptr(ptr), &kfprog->filter))
348 return -EFAULT;
349
350 return sock_setsockopt(sock, level, optname, (char __user *)kfprog,
351 sizeof(struct sock_fprog));
352 }
353
354 static int do_set_sock_timeout(struct socket *sock, int level,
355 int optname, char __user *optval, unsigned int optlen)
356 {
357 struct compat_timeval __user *up = (struct compat_timeval __user *)optval;
358 struct timeval ktime;
359 mm_segment_t old_fs;
360 int err;
361
362 if (optlen < sizeof(*up))
363 return -EINVAL;
364 if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
365 __get_user(ktime.tv_sec, &up->tv_sec) ||
366 __get_user(ktime.tv_usec, &up->tv_usec))
367 return -EFAULT;
368 old_fs = get_fs();
369 set_fs(KERNEL_DS);
370 err = sock_setsockopt(sock, level, optname, (char *)&ktime, sizeof(ktime));
371 set_fs(old_fs);
372
373 return err;
374 }
375
376 static int compat_sock_setsockopt(struct socket *sock, int level, int optname,
377 char __user *optval, unsigned int optlen)
378 {
379 if (optname == SO_ATTACH_FILTER)
380 return do_set_attach_filter(sock, level, optname,
381 optval, optlen);
382 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
383 return do_set_sock_timeout(sock, level, optname, optval, optlen);
384
385 return sock_setsockopt(sock, level, optname, optval, optlen);
386 }
387
388 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
389 char __user *optval, unsigned int optlen)
390 {
391 int err;
392 struct socket *sock = sockfd_lookup(fd, &err);
393
394 if (sock) {
395 err = security_socket_setsockopt(sock, level, optname);
396 if (err) {
397 sockfd_put(sock);
398 return err;
399 }
400
401 if (level == SOL_SOCKET)
402 err = compat_sock_setsockopt(sock, level,
403 optname, optval, optlen);
404 else if (sock->ops->compat_setsockopt)
405 err = sock->ops->compat_setsockopt(sock, level,
406 optname, optval, optlen);
407 else
408 err = sock->ops->setsockopt(sock, level,
409 optname, optval, optlen);
410 sockfd_put(sock);
411 }
412 return err;
413 }
414
415 static int do_get_sock_timeout(struct socket *sock, int level, int optname,
416 char __user *optval, int __user *optlen)
417 {
418 struct compat_timeval __user *up;
419 struct timeval ktime;
420 mm_segment_t old_fs;
421 int len, err;
422
423 up = (struct compat_timeval __user *) optval;
424 if (get_user(len, optlen))
425 return -EFAULT;
426 if (len < sizeof(*up))
427 return -EINVAL;
428 len = sizeof(ktime);
429 old_fs = get_fs();
430 set_fs(KERNEL_DS);
431 err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len);
432 set_fs(old_fs);
433
434 if (!err) {
435 if (put_user(sizeof(*up), optlen) ||
436 !access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
437 __put_user(ktime.tv_sec, &up->tv_sec) ||
438 __put_user(ktime.tv_usec, &up->tv_usec))
439 err = -EFAULT;
440 }
441 return err;
442 }
443
444 static int compat_sock_getsockopt(struct socket *sock, int level, int optname,
445 char __user *optval, int __user *optlen)
446 {
447 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
448 return do_get_sock_timeout(sock, level, optname, optval, optlen);
449 return sock_getsockopt(sock, level, optname, optval, optlen);
450 }
451
452 int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp)
453 {
454 struct compat_timeval __user *ctv;
455 int err;
456 struct timeval tv;
457
458 if (COMPAT_USE_64BIT_TIME)
459 return sock_get_timestamp(sk, userstamp);
460
461 ctv = (struct compat_timeval __user *) userstamp;
462 err = -ENOENT;
463 if (!sock_flag(sk, SOCK_TIMESTAMP))
464 sock_enable_timestamp(sk, SOCK_TIMESTAMP);
465 tv = ktime_to_timeval(sk->sk_stamp);
466 if (tv.tv_sec == -1)
467 return err;
468 if (tv.tv_sec == 0) {
469 sk->sk_stamp = ktime_get_real();
470 tv = ktime_to_timeval(sk->sk_stamp);
471 }
472 err = 0;
473 if (put_user(tv.tv_sec, &ctv->tv_sec) ||
474 put_user(tv.tv_usec, &ctv->tv_usec))
475 err = -EFAULT;
476 return err;
477 }
478 EXPORT_SYMBOL(compat_sock_get_timestamp);
479
480 int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp)
481 {
482 struct compat_timespec __user *ctv;
483 int err;
484 struct timespec ts;
485
486 if (COMPAT_USE_64BIT_TIME)
487 return sock_get_timestampns (sk, userstamp);
488
489 ctv = (struct compat_timespec __user *) userstamp;
490 err = -ENOENT;
491 if (!sock_flag(sk, SOCK_TIMESTAMP))
492 sock_enable_timestamp(sk, SOCK_TIMESTAMP);
493 ts = ktime_to_timespec(sk->sk_stamp);
494 if (ts.tv_sec == -1)
495 return err;
496 if (ts.tv_sec == 0) {
497 sk->sk_stamp = ktime_get_real();
498 ts = ktime_to_timespec(sk->sk_stamp);
499 }
500 err = 0;
501 if (put_user(ts.tv_sec, &ctv->tv_sec) ||
502 put_user(ts.tv_nsec, &ctv->tv_nsec))
503 err = -EFAULT;
504 return err;
505 }
506 EXPORT_SYMBOL(compat_sock_get_timestampns);
507
508 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
509 char __user *optval, int __user *optlen)
510 {
511 int err;
512 struct socket *sock = sockfd_lookup(fd, &err);
513
514 if (sock) {
515 err = security_socket_getsockopt(sock, level, optname);
516 if (err) {
517 sockfd_put(sock);
518 return err;
519 }
520
521 if (level == SOL_SOCKET)
522 err = compat_sock_getsockopt(sock, level,
523 optname, optval, optlen);
524 else if (sock->ops->compat_getsockopt)
525 err = sock->ops->compat_getsockopt(sock, level,
526 optname, optval, optlen);
527 else
528 err = sock->ops->getsockopt(sock, level,
529 optname, optval, optlen);
530 sockfd_put(sock);
531 }
532 return err;
533 }
534
535 struct compat_group_req {
536 __u32 gr_interface;
537 struct __kernel_sockaddr_storage gr_group
538 __attribute__ ((aligned(4)));
539 } __packed;
540
541 struct compat_group_source_req {
542 __u32 gsr_interface;
543 struct __kernel_sockaddr_storage gsr_group
544 __attribute__ ((aligned(4)));
545 struct __kernel_sockaddr_storage gsr_source
546 __attribute__ ((aligned(4)));
547 } __packed;
548
549 struct compat_group_filter {
550 __u32 gf_interface;
551 struct __kernel_sockaddr_storage gf_group
552 __attribute__ ((aligned(4)));
553 __u32 gf_fmode;
554 __u32 gf_numsrc;
555 struct __kernel_sockaddr_storage gf_slist[1]
556 __attribute__ ((aligned(4)));
557 } __packed;
558
559 #define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \
560 sizeof(struct __kernel_sockaddr_storage))
561
562
563 int compat_mc_setsockopt(struct sock *sock, int level, int optname,
564 char __user *optval, unsigned int optlen,
565 int (*setsockopt)(struct sock *, int, int, char __user *, unsigned int))
566 {
567 char __user *koptval = optval;
568 int koptlen = optlen;
569
570 switch (optname) {
571 case MCAST_JOIN_GROUP:
572 case MCAST_LEAVE_GROUP:
573 {
574 struct compat_group_req __user *gr32 = (void *)optval;
575 struct group_req __user *kgr =
576 compat_alloc_user_space(sizeof(struct group_req));
577 u32 interface;
578
579 if (!access_ok(VERIFY_READ, gr32, sizeof(*gr32)) ||
580 !access_ok(VERIFY_WRITE, kgr, sizeof(struct group_req)) ||
581 __get_user(interface, &gr32->gr_interface) ||
582 __put_user(interface, &kgr->gr_interface) ||
583 copy_in_user(&kgr->gr_group, &gr32->gr_group,
584 sizeof(kgr->gr_group)))
585 return -EFAULT;
586 koptval = (char __user *)kgr;
587 koptlen = sizeof(struct group_req);
588 break;
589 }
590 case MCAST_JOIN_SOURCE_GROUP:
591 case MCAST_LEAVE_SOURCE_GROUP:
592 case MCAST_BLOCK_SOURCE:
593 case MCAST_UNBLOCK_SOURCE:
594 {
595 struct compat_group_source_req __user *gsr32 = (void *)optval;
596 struct group_source_req __user *kgsr = compat_alloc_user_space(
597 sizeof(struct group_source_req));
598 u32 interface;
599
600 if (!access_ok(VERIFY_READ, gsr32, sizeof(*gsr32)) ||
601 !access_ok(VERIFY_WRITE, kgsr,
602 sizeof(struct group_source_req)) ||
603 __get_user(interface, &gsr32->gsr_interface) ||
604 __put_user(interface, &kgsr->gsr_interface) ||
605 copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group,
606 sizeof(kgsr->gsr_group)) ||
607 copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source,
608 sizeof(kgsr->gsr_source)))
609 return -EFAULT;
610 koptval = (char __user *)kgsr;
611 koptlen = sizeof(struct group_source_req);
612 break;
613 }
614 case MCAST_MSFILTER:
615 {
616 struct compat_group_filter __user *gf32 = (void *)optval;
617 struct group_filter __user *kgf;
618 u32 interface, fmode, numsrc;
619
620 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) ||
621 __get_user(interface, &gf32->gf_interface) ||
622 __get_user(fmode, &gf32->gf_fmode) ||
623 __get_user(numsrc, &gf32->gf_numsrc))
624 return -EFAULT;
625 koptlen = optlen + sizeof(struct group_filter) -
626 sizeof(struct compat_group_filter);
627 if (koptlen < GROUP_FILTER_SIZE(numsrc))
628 return -EINVAL;
629 kgf = compat_alloc_user_space(koptlen);
630 if (!access_ok(VERIFY_WRITE, kgf, koptlen) ||
631 __put_user(interface, &kgf->gf_interface) ||
632 __put_user(fmode, &kgf->gf_fmode) ||
633 __put_user(numsrc, &kgf->gf_numsrc) ||
634 copy_in_user(&kgf->gf_group, &gf32->gf_group,
635 sizeof(kgf->gf_group)) ||
636 (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist,
637 numsrc * sizeof(kgf->gf_slist[0]))))
638 return -EFAULT;
639 koptval = (char __user *)kgf;
640 break;
641 }
642
643 default:
644 break;
645 }
646 return setsockopt(sock, level, optname, koptval, koptlen);
647 }
648 EXPORT_SYMBOL(compat_mc_setsockopt);
649
650 int compat_mc_getsockopt(struct sock *sock, int level, int optname,
651 char __user *optval, int __user *optlen,
652 int (*getsockopt)(struct sock *, int, int, char __user *, int __user *))
653 {
654 struct compat_group_filter __user *gf32 = (void *)optval;
655 struct group_filter __user *kgf;
656 int __user *koptlen;
657 u32 interface, fmode, numsrc;
658 int klen, ulen, err;
659
660 if (optname != MCAST_MSFILTER)
661 return getsockopt(sock, level, optname, optval, optlen);
662
663 koptlen = compat_alloc_user_space(sizeof(*koptlen));
664 if (!access_ok(VERIFY_READ, optlen, sizeof(*optlen)) ||
665 __get_user(ulen, optlen))
666 return -EFAULT;
667
668 /* adjust len for pad */
669 klen = ulen + sizeof(*kgf) - sizeof(*gf32);
670
671 if (klen < GROUP_FILTER_SIZE(0))
672 return -EINVAL;
673
674 if (!access_ok(VERIFY_WRITE, koptlen, sizeof(*koptlen)) ||
675 __put_user(klen, koptlen))
676 return -EFAULT;
677
678 /* have to allow space for previous compat_alloc_user_space, too */
679 kgf = compat_alloc_user_space(klen+sizeof(*optlen));
680
681 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) ||
682 __get_user(interface, &gf32->gf_interface) ||
683 __get_user(fmode, &gf32->gf_fmode) ||
684 __get_user(numsrc, &gf32->gf_numsrc) ||
685 __put_user(interface, &kgf->gf_interface) ||
686 __put_user(fmode, &kgf->gf_fmode) ||
687 __put_user(numsrc, &kgf->gf_numsrc) ||
688 copy_in_user(&kgf->gf_group, &gf32->gf_group, sizeof(kgf->gf_group)))
689 return -EFAULT;
690
691 err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen);
692 if (err)
693 return err;
694
695 if (!access_ok(VERIFY_READ, koptlen, sizeof(*koptlen)) ||
696 __get_user(klen, koptlen))
697 return -EFAULT;
698
699 ulen = klen - (sizeof(*kgf)-sizeof(*gf32));
700
701 if (!access_ok(VERIFY_WRITE, optlen, sizeof(*optlen)) ||
702 __put_user(ulen, optlen))
703 return -EFAULT;
704
705 if (!access_ok(VERIFY_READ, kgf, klen) ||
706 !access_ok(VERIFY_WRITE, gf32, ulen) ||
707 __get_user(interface, &kgf->gf_interface) ||
708 __get_user(fmode, &kgf->gf_fmode) ||
709 __get_user(numsrc, &kgf->gf_numsrc) ||
710 __put_user(interface, &gf32->gf_interface) ||
711 __put_user(fmode, &gf32->gf_fmode) ||
712 __put_user(numsrc, &gf32->gf_numsrc))
713 return -EFAULT;
714 if (numsrc) {
715 int copylen;
716
717 klen -= GROUP_FILTER_SIZE(0);
718 copylen = numsrc * sizeof(gf32->gf_slist[0]);
719 if (copylen > klen)
720 copylen = klen;
721 if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen))
722 return -EFAULT;
723 }
724 return err;
725 }
726 EXPORT_SYMBOL(compat_mc_getsockopt);
727
728
729 /* Argument list sizes for compat_sys_socketcall */
730 #define AL(x) ((x) * sizeof(u32))
731 static unsigned char nas[21] = {
732 AL(0), AL(3), AL(3), AL(3), AL(2), AL(3),
733 AL(3), AL(3), AL(4), AL(4), AL(4), AL(6),
734 AL(6), AL(2), AL(5), AL(5), AL(3), AL(3),
735 AL(4), AL(5), AL(4)
736 };
737 #undef AL
738
739 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags)
740 {
741 if (flags & MSG_CMSG_COMPAT)
742 return -EINVAL;
743 return __sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
744 }
745
746 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
747 unsigned int vlen, unsigned int flags)
748 {
749 if (flags & MSG_CMSG_COMPAT)
750 return -EINVAL;
751 return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
752 flags | MSG_CMSG_COMPAT);
753 }
754
755 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags)
756 {
757 if (flags & MSG_CMSG_COMPAT)
758 return -EINVAL;
759 return __sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
760 }
761
762 asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len, unsigned int flags)
763 {
764 return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT);
765 }
766
767 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, size_t len,
768 unsigned int flags, struct sockaddr __user *addr,
769 int __user *addrlen)
770 {
771 return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen);
772 }
773
774 asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
775 unsigned int vlen, unsigned int flags,
776 struct compat_timespec __user *timeout)
777 {
778 int datagrams;
779 struct timespec ktspec;
780
781 if (flags & MSG_CMSG_COMPAT)
782 return -EINVAL;
783
784 if (timeout == NULL)
785 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
786 flags | MSG_CMSG_COMPAT, NULL);
787
788 if (compat_get_timespec(&ktspec, timeout))
789 return -EFAULT;
790
791 datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
792 flags | MSG_CMSG_COMPAT, &ktspec);
793 if (datagrams > 0 && compat_put_timespec(&ktspec, timeout))
794 datagrams = -EFAULT;
795
796 return datagrams;
797 }
798
799 asmlinkage long compat_sys_socketcall(int call, u32 __user *args)
800 {
801 int ret;
802 u32 a[6];
803 u32 a0, a1;
804
805 if (call < SYS_SOCKET || call > SYS_SENDMMSG)
806 return -EINVAL;
807 if (copy_from_user(a, args, nas[call]))
808 return -EFAULT;
809 a0 = a[0];
810 a1 = a[1];
811
812 switch (call) {
813 case SYS_SOCKET:
814 ret = sys_socket(a0, a1, a[2]);
815 break;
816 case SYS_BIND:
817 ret = sys_bind(a0, compat_ptr(a1), a[2]);
818 break;
819 case SYS_CONNECT:
820 ret = sys_connect(a0, compat_ptr(a1), a[2]);
821 break;
822 case SYS_LISTEN:
823 ret = sys_listen(a0, a1);
824 break;
825 case SYS_ACCEPT:
826 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0);
827 break;
828 case SYS_GETSOCKNAME:
829 ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
830 break;
831 case SYS_GETPEERNAME:
832 ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2]));
833 break;
834 case SYS_SOCKETPAIR:
835 ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3]));
836 break;
837 case SYS_SEND:
838 ret = sys_send(a0, compat_ptr(a1), a[2], a[3]);
839 break;
840 case SYS_SENDTO:
841 ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]);
842 break;
843 case SYS_RECV:
844 ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]);
845 break;
846 case SYS_RECVFROM:
847 ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3],
848 compat_ptr(a[4]), compat_ptr(a[5]));
849 break;
850 case SYS_SHUTDOWN:
851 ret = sys_shutdown(a0, a1);
852 break;
853 case SYS_SETSOCKOPT:
854 ret = compat_sys_setsockopt(a0, a1, a[2],
855 compat_ptr(a[3]), a[4]);
856 break;
857 case SYS_GETSOCKOPT:
858 ret = compat_sys_getsockopt(a0, a1, a[2],
859 compat_ptr(a[3]), compat_ptr(a[4]));
860 break;
861 case SYS_SENDMSG:
862 ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
863 break;
864 case SYS_SENDMMSG:
865 ret = compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]);
866 break;
867 case SYS_RECVMSG:
868 ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);
869 break;
870 case SYS_RECVMMSG:
871 ret = compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3],
872 compat_ptr(a[4]));
873 break;
874 case SYS_ACCEPT4:
875 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]);
876 break;
877 default:
878 ret = -EINVAL;
879 break;
880 }
881 return ret;
882 }
Linux with added FPC-III support