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perf/x86/intel/uncore: Fix wrong box pointer check
[linux/fpc-iii.git] / net / compat.c
blobaba929e5250f1b6bf27c356eb1f19ea9be2f85c8
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/audit.h>
26 #include <linux/export.h>
27
28 #include <net/scm.h>
29 #include <net/sock.h>
30 #include <net/ip.h>
31 #include <net/ipv6.h>
32 #include <linux/uaccess.h>
33 #include <net/compat.h>
34
35 int get_compat_msghdr(struct msghdr *kmsg,
36 struct compat_msghdr __user *umsg,
37 struct sockaddr __user **save_addr,
38 struct iovec **iov)
39 {
40 compat_uptr_t uaddr, uiov, tmp3;
41 compat_size_t nr_segs;
42 ssize_t err;
43
44 if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) ||
45 __get_user(uaddr, &umsg->msg_name) ||
46 __get_user(kmsg->msg_namelen, &umsg->msg_namelen) ||
47 __get_user(uiov, &umsg->msg_iov) ||
48 __get_user(nr_segs, &umsg->msg_iovlen) ||
49 __get_user(tmp3, &umsg->msg_control) ||
50 __get_user(kmsg->msg_controllen, &umsg->msg_controllen) ||
51 __get_user(kmsg->msg_flags, &umsg->msg_flags))
52 return -EFAULT;
53
54 if (!uaddr)
55 kmsg->msg_namelen = 0;
56
57 if (kmsg->msg_namelen < 0)
58 return -EINVAL;
59
60 if (kmsg->msg_namelen > sizeof(struct sockaddr_storage))
61 kmsg->msg_namelen = sizeof(struct sockaddr_storage);
62 kmsg->msg_control = compat_ptr(tmp3);
63
64 if (save_addr)
65 *save_addr = compat_ptr(uaddr);
66
67 if (uaddr && kmsg->msg_namelen) {
68 if (!save_addr) {
69 err = move_addr_to_kernel(compat_ptr(uaddr),
70 kmsg->msg_namelen,
71 kmsg->msg_name);
72 if (err < 0)
73 return err;
74 }
75 } else {
76 kmsg->msg_name = NULL;
77 kmsg->msg_namelen = 0;
78 }
79
80 if (nr_segs > UIO_MAXIOV)
81 return -EMSGSIZE;
82
83 kmsg->msg_iocb = NULL;
84
85 return compat_import_iovec(save_addr ? READ : WRITE,
86 compat_ptr(uiov), nr_segs,
87 UIO_FASTIOV, iov, &kmsg->msg_iter);
88 }
89
90 /* Bleech... */
91 #define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32))
92
93 #define CMSG_COMPAT_DATA(cmsg) \
94 ((void __user *)((char __user *)(cmsg) + sizeof(struct compat_cmsghdr)))
95 #define CMSG_COMPAT_SPACE(len) \
96 (sizeof(struct compat_cmsghdr) + CMSG_COMPAT_ALIGN(len))
97 #define CMSG_COMPAT_LEN(len) \
98 (sizeof(struct compat_cmsghdr) + (len))
99
100 #define CMSG_COMPAT_FIRSTHDR(msg) \
101 (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \
102 (struct compat_cmsghdr __user *)((msg)->msg_control) : \
103 (struct compat_cmsghdr __user *)NULL)
104
105 #define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \
106 ((ucmlen) >= sizeof(struct compat_cmsghdr) && \
107 (ucmlen) <= (unsigned long) \
108 ((mhdr)->msg_controllen - \
109 ((char *)(ucmsg) - (char *)(mhdr)->msg_control)))
110
111 static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg,
112 struct compat_cmsghdr __user *cmsg, int cmsg_len)
113 {
114 char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len);
115 if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) >
116 msg->msg_controllen)
117 return NULL;
118 return (struct compat_cmsghdr __user *)ptr;
119 }
120
121 /* There is a lot of hair here because the alignment rules (and
122 * thus placement) of cmsg headers and length are different for
123 * 32-bit apps. -DaveM
124 */
125 int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk,
126 unsigned char *stackbuf, int stackbuf_size)
127 {
128 struct compat_cmsghdr __user *ucmsg;
129 struct cmsghdr *kcmsg, *kcmsg_base;
130 compat_size_t ucmlen;
131 __kernel_size_t kcmlen, tmp;
132 int err = -EFAULT;
133
134 BUILD_BUG_ON(sizeof(struct compat_cmsghdr) !=
135 CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)));
136
137 kcmlen = 0;
138 kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf;
139 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
140 while (ucmsg != NULL) {
141 if (get_user(ucmlen, &ucmsg->cmsg_len))
142 return -EFAULT;
143
144 /* Catch bogons. */
145 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
146 return -EINVAL;
147
148 tmp = ((ucmlen - sizeof(*ucmsg)) + sizeof(struct cmsghdr));
149 tmp = CMSG_ALIGN(tmp);
150 kcmlen += tmp;
151 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
152 }
153 if (kcmlen == 0)
154 return -EINVAL;
155
156 /* The kcmlen holds the 64-bit version of the control length.
157 * It may not be modified as we do not stick it into the kmsg
158 * until we have successfully copied over all of the data
159 * from the user.
160 */
161 if (kcmlen > stackbuf_size)
162 kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL);
163 if (kcmsg == NULL)
164 return -ENOBUFS;
165
166 /* Now copy them over neatly. */
167 memset(kcmsg, 0, kcmlen);
168 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
169 while (ucmsg != NULL) {
170 if (__get_user(ucmlen, &ucmsg->cmsg_len))
171 goto Efault;
172 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
173 goto Einval;
174 tmp = ((ucmlen - sizeof(*ucmsg)) + sizeof(struct cmsghdr));
175 if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp))
176 goto Einval;
177 kcmsg->cmsg_len = tmp;
178 tmp = CMSG_ALIGN(tmp);
179 if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) ||
180 __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) ||
181 copy_from_user(CMSG_DATA(kcmsg),
182 CMSG_COMPAT_DATA(ucmsg),
183 (ucmlen - sizeof(*ucmsg))))
184 goto Efault;
185
186 /* Advance. */
187 kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp);
188 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
189 }
190
191 /* Ok, looks like we made it. Hook it up and return success. */
192 kmsg->msg_control = kcmsg_base;
193 kmsg->msg_controllen = kcmlen;
194 return 0;
195
196 Einval:
197 err = -EINVAL;
198 Efault:
199 if (kcmsg_base != (struct cmsghdr *)stackbuf)
200 sock_kfree_s(sk, kcmsg_base, kcmlen);
201 return err;
202 }
203
204 int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data)
205 {
206 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
207 struct compat_cmsghdr cmhdr;
208 struct compat_timeval ctv;
209 struct compat_timespec cts[3];
210 int cmlen;
211
212 if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) {
213 kmsg->msg_flags |= MSG_CTRUNC;
214 return 0; /* XXX: return error? check spec. */
215 }
216
217 if (!COMPAT_USE_64BIT_TIME) {
218 if (level == SOL_SOCKET && type == SCM_TIMESTAMP) {
219 struct timeval *tv = (struct timeval *)data;
220 ctv.tv_sec = tv->tv_sec;
221 ctv.tv_usec = tv->tv_usec;
222 data = &ctv;
223 len = sizeof(ctv);
224 }
225 if (level == SOL_SOCKET &&
226 (type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) {
227 int count = type == SCM_TIMESTAMPNS ? 1 : 3;
228 int i;
229 struct timespec *ts = (struct timespec *)data;
230 for (i = 0; i < count; i++) {
231 cts[i].tv_sec = ts[i].tv_sec;
232 cts[i].tv_nsec = ts[i].tv_nsec;
233 }
234 data = &cts;
235 len = sizeof(cts[0]) * count;
236 }
237 }
238
239 cmlen = CMSG_COMPAT_LEN(len);
240 if (kmsg->msg_controllen < cmlen) {
241 kmsg->msg_flags |= MSG_CTRUNC;
242 cmlen = kmsg->msg_controllen;
243 }
244 cmhdr.cmsg_level = level;
245 cmhdr.cmsg_type = type;
246 cmhdr.cmsg_len = cmlen;
247
248 if (copy_to_user(cm, &cmhdr, sizeof cmhdr))
249 return -EFAULT;
250 if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr)))
251 return -EFAULT;
252 cmlen = CMSG_COMPAT_SPACE(len);
253 if (kmsg->msg_controllen < cmlen)
254 cmlen = kmsg->msg_controllen;
255 kmsg->msg_control += cmlen;
256 kmsg->msg_controllen -= cmlen;
257 return 0;
258 }
259
260 void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm)
261 {
262 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
263 int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int);
264 int fdnum = scm->fp->count;
265 struct file **fp = scm->fp->fp;
266 int __user *cmfptr;
267 int err = 0, i;
268
269 if (fdnum < fdmax)
270 fdmax = fdnum;
271
272 for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) {
273 int new_fd;
274 err = security_file_receive(fp[i]);
275 if (err)
276 break;
277 err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags
278 ? O_CLOEXEC : 0);
279 if (err < 0)
280 break;
281 new_fd = err;
282 err = put_user(new_fd, cmfptr);
283 if (err) {
284 put_unused_fd(new_fd);
285 break;
286 }
287 /* Bump the usage count and install the file. */
288 fd_install(new_fd, get_file(fp[i]));
289 }
290
291 if (i > 0) {
292 int cmlen = CMSG_COMPAT_LEN(i * sizeof(int));
293 err = put_user(SOL_SOCKET, &cm->cmsg_level);
294 if (!err)
295 err = put_user(SCM_RIGHTS, &cm->cmsg_type);
296 if (!err)
297 err = put_user(cmlen, &cm->cmsg_len);
298 if (!err) {
299 cmlen = CMSG_COMPAT_SPACE(i * sizeof(int));
300 kmsg->msg_control += cmlen;
301 kmsg->msg_controllen -= cmlen;
302 }
303 }
304 if (i < fdnum)
305 kmsg->msg_flags |= MSG_CTRUNC;
306
307 /*
308 * All of the files that fit in the message have had their
309 * usage counts incremented, so we just free the list.
310 */
311 __scm_destroy(scm);
312 }
313
314 /* allocate a 64-bit sock_fprog on the user stack for duration of syscall. */
315 struct sock_fprog __user *get_compat_bpf_fprog(char __user *optval)
316 {
317 struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval;
318 struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog));
319 compat_uptr_t ptr;
320 u16 len;
321
322 if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) ||
323 !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) ||
324 __get_user(len, &fprog32->len) ||
325 __get_user(ptr, &fprog32->filter) ||
326 __put_user(len, &kfprog->len) ||
327 __put_user(compat_ptr(ptr), &kfprog->filter))
328 return NULL;
329
330 return kfprog;
331 }
332 EXPORT_SYMBOL_GPL(get_compat_bpf_fprog);
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 sock_fprog __user *kfprog;
338
339 kfprog = get_compat_bpf_fprog(optval);
340 if (!kfprog)
341 return -EFAULT;
342
343 return sock_setsockopt(sock, level, optname, (char __user *)kfprog,
344 sizeof(struct sock_fprog));
345 }
346
347 static int do_set_sock_timeout(struct socket *sock, int level,
348 int optname, char __user *optval, unsigned int optlen)
349 {
350 struct compat_timeval __user *up = (struct compat_timeval __user *)optval;
351 struct timeval ktime;
352 mm_segment_t old_fs;
353 int err;
354
355 if (optlen < sizeof(*up))
356 return -EINVAL;
357 if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
358 __get_user(ktime.tv_sec, &up->tv_sec) ||
359 __get_user(ktime.tv_usec, &up->tv_usec))
360 return -EFAULT;
361 old_fs = get_fs();
362 set_fs(KERNEL_DS);
363 err = sock_setsockopt(sock, level, optname, (char *)&ktime, sizeof(ktime));
364 set_fs(old_fs);
365
366 return err;
367 }
368
369 static int compat_sock_setsockopt(struct socket *sock, int level, int optname,
370 char __user *optval, unsigned int optlen)
371 {
372 if (optname == SO_ATTACH_FILTER ||
373 optname == SO_ATTACH_REUSEPORT_CBPF)
374 return do_set_attach_filter(sock, level, optname,
375 optval, optlen);
376 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
377 return do_set_sock_timeout(sock, level, optname, optval, optlen);
378
379 return sock_setsockopt(sock, level, optname, optval, optlen);
380 }
381
382 COMPAT_SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname,
383 char __user *, optval, unsigned int, optlen)
384 {
385 int err;
386 struct socket *sock = sockfd_lookup(fd, &err);
387
388 if (sock) {
389 err = security_socket_setsockopt(sock, level, optname);
390 if (err) {
391 sockfd_put(sock);
392 return err;
393 }
394
395 if (level == SOL_SOCKET)
396 err = compat_sock_setsockopt(sock, level,
397 optname, optval, optlen);
398 else if (sock->ops->compat_setsockopt)
399 err = sock->ops->compat_setsockopt(sock, level,
400 optname, optval, optlen);
401 else
402 err = sock->ops->setsockopt(sock, level,
403 optname, optval, optlen);
404 sockfd_put(sock);
405 }
406 return err;
407 }
408
409 static int do_get_sock_timeout(struct socket *sock, int level, int optname,
410 char __user *optval, int __user *optlen)
411 {
412 struct compat_timeval __user *up;
413 struct timeval ktime;
414 mm_segment_t old_fs;
415 int len, err;
416
417 up = (struct compat_timeval __user *) optval;
418 if (get_user(len, optlen))
419 return -EFAULT;
420 if (len < sizeof(*up))
421 return -EINVAL;
422 len = sizeof(ktime);
423 old_fs = get_fs();
424 set_fs(KERNEL_DS);
425 err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len);
426 set_fs(old_fs);
427
428 if (!err) {
429 if (put_user(sizeof(*up), optlen) ||
430 !access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
431 __put_user(ktime.tv_sec, &up->tv_sec) ||
432 __put_user(ktime.tv_usec, &up->tv_usec))
433 err = -EFAULT;
434 }
435 return err;
436 }
437
438 static int compat_sock_getsockopt(struct socket *sock, int level, int optname,
439 char __user *optval, int __user *optlen)
440 {
441 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
442 return do_get_sock_timeout(sock, level, optname, optval, optlen);
443 return sock_getsockopt(sock, level, optname, optval, optlen);
444 }
445
446 int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp)
447 {
448 struct compat_timeval __user *ctv;
449 int err;
450 struct timeval tv;
451
452 if (COMPAT_USE_64BIT_TIME)
453 return sock_get_timestamp(sk, userstamp);
454
455 ctv = (struct compat_timeval __user *) userstamp;
456 err = -ENOENT;
457 if (!sock_flag(sk, SOCK_TIMESTAMP))
458 sock_enable_timestamp(sk, SOCK_TIMESTAMP);
459 tv = ktime_to_timeval(sk->sk_stamp);
460 if (tv.tv_sec == -1)
461 return err;
462 if (tv.tv_sec == 0) {
463 sk->sk_stamp = ktime_get_real();
464 tv = ktime_to_timeval(sk->sk_stamp);
465 }
466 err = 0;
467 if (put_user(tv.tv_sec, &ctv->tv_sec) ||
468 put_user(tv.tv_usec, &ctv->tv_usec))
469 err = -EFAULT;
470 return err;
471 }
472 EXPORT_SYMBOL(compat_sock_get_timestamp);
473
474 int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp)
475 {
476 struct compat_timespec __user *ctv;
477 int err;
478 struct timespec ts;
479
480 if (COMPAT_USE_64BIT_TIME)
481 return sock_get_timestampns (sk, userstamp);
482
483 ctv = (struct compat_timespec __user *) userstamp;
484 err = -ENOENT;
485 if (!sock_flag(sk, SOCK_TIMESTAMP))
486 sock_enable_timestamp(sk, SOCK_TIMESTAMP);
487 ts = ktime_to_timespec(sk->sk_stamp);
488 if (ts.tv_sec == -1)
489 return err;
490 if (ts.tv_sec == 0) {
491 sk->sk_stamp = ktime_get_real();
492 ts = ktime_to_timespec(sk->sk_stamp);
493 }
494 err = 0;
495 if (put_user(ts.tv_sec, &ctv->tv_sec) ||
496 put_user(ts.tv_nsec, &ctv->tv_nsec))
497 err = -EFAULT;
498 return err;
499 }
500 EXPORT_SYMBOL(compat_sock_get_timestampns);
501
502 COMPAT_SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname,
503 char __user *, optval, int __user *, optlen)
504 {
505 int err;
506 struct socket *sock = sockfd_lookup(fd, &err);
507
508 if (sock) {
509 err = security_socket_getsockopt(sock, level, optname);
510 if (err) {
511 sockfd_put(sock);
512 return err;
513 }
514
515 if (level == SOL_SOCKET)
516 err = compat_sock_getsockopt(sock, level,
517 optname, optval, optlen);
518 else if (sock->ops->compat_getsockopt)
519 err = sock->ops->compat_getsockopt(sock, level,
520 optname, optval, optlen);
521 else
522 err = sock->ops->getsockopt(sock, level,
523 optname, optval, optlen);
524 sockfd_put(sock);
525 }
526 return err;
527 }
528
529 struct compat_group_req {
530 __u32 gr_interface;
531 struct __kernel_sockaddr_storage gr_group
532 __aligned(4);
533 } __packed;
534
535 struct compat_group_source_req {
536 __u32 gsr_interface;
537 struct __kernel_sockaddr_storage gsr_group
538 __aligned(4);
539 struct __kernel_sockaddr_storage gsr_source
540 __aligned(4);
541 } __packed;
542
543 struct compat_group_filter {
544 __u32 gf_interface;
545 struct __kernel_sockaddr_storage gf_group
546 __aligned(4);
547 __u32 gf_fmode;
548 __u32 gf_numsrc;
549 struct __kernel_sockaddr_storage gf_slist[1]
550 __aligned(4);
551 } __packed;
552
553 #define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \
554 sizeof(struct __kernel_sockaddr_storage))
555
556
557 int compat_mc_setsockopt(struct sock *sock, int level, int optname,
558 char __user *optval, unsigned int optlen,
559 int (*setsockopt)(struct sock *, int, int, char __user *, unsigned int))
560 {
561 char __user *koptval = optval;
562 int koptlen = optlen;
563
564 switch (optname) {
565 case MCAST_JOIN_GROUP:
566 case MCAST_LEAVE_GROUP:
567 {
568 struct compat_group_req __user *gr32 = (void *)optval;
569 struct group_req __user *kgr =
570 compat_alloc_user_space(sizeof(struct group_req));
571 u32 interface;
572
573 if (!access_ok(VERIFY_READ, gr32, sizeof(*gr32)) ||
574 !access_ok(VERIFY_WRITE, kgr, sizeof(struct group_req)) ||
575 __get_user(interface, &gr32->gr_interface) ||
576 __put_user(interface, &kgr->gr_interface) ||
577 copy_in_user(&kgr->gr_group, &gr32->gr_group,
578 sizeof(kgr->gr_group)))
579 return -EFAULT;
580 koptval = (char __user *)kgr;
581 koptlen = sizeof(struct group_req);
582 break;
583 }
584 case MCAST_JOIN_SOURCE_GROUP:
585 case MCAST_LEAVE_SOURCE_GROUP:
586 case MCAST_BLOCK_SOURCE:
587 case MCAST_UNBLOCK_SOURCE:
588 {
589 struct compat_group_source_req __user *gsr32 = (void *)optval;
590 struct group_source_req __user *kgsr = compat_alloc_user_space(
591 sizeof(struct group_source_req));
592 u32 interface;
593
594 if (!access_ok(VERIFY_READ, gsr32, sizeof(*gsr32)) ||
595 !access_ok(VERIFY_WRITE, kgsr,
596 sizeof(struct group_source_req)) ||
597 __get_user(interface, &gsr32->gsr_interface) ||
598 __put_user(interface, &kgsr->gsr_interface) ||
599 copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group,
600 sizeof(kgsr->gsr_group)) ||
601 copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source,
602 sizeof(kgsr->gsr_source)))
603 return -EFAULT;
604 koptval = (char __user *)kgsr;
605 koptlen = sizeof(struct group_source_req);
606 break;
607 }
608 case MCAST_MSFILTER:
609 {
610 struct compat_group_filter __user *gf32 = (void *)optval;
611 struct group_filter __user *kgf;
612 u32 interface, fmode, numsrc;
613
614 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) ||
615 __get_user(interface, &gf32->gf_interface) ||
616 __get_user(fmode, &gf32->gf_fmode) ||
617 __get_user(numsrc, &gf32->gf_numsrc))
618 return -EFAULT;
619 koptlen = optlen + sizeof(struct group_filter) -
620 sizeof(struct compat_group_filter);
621 if (koptlen < GROUP_FILTER_SIZE(numsrc))
622 return -EINVAL;
623 kgf = compat_alloc_user_space(koptlen);
624 if (!access_ok(VERIFY_WRITE, kgf, koptlen) ||
625 __put_user(interface, &kgf->gf_interface) ||
626 __put_user(fmode, &kgf->gf_fmode) ||
627 __put_user(numsrc, &kgf->gf_numsrc) ||
628 copy_in_user(&kgf->gf_group, &gf32->gf_group,
629 sizeof(kgf->gf_group)) ||
630 (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist,
631 numsrc * sizeof(kgf->gf_slist[0]))))
632 return -EFAULT;
633 koptval = (char __user *)kgf;
634 break;
635 }
636
637 default:
638 break;
639 }
640 return setsockopt(sock, level, optname, koptval, koptlen);
641 }
642 EXPORT_SYMBOL(compat_mc_setsockopt);
643
644 int compat_mc_getsockopt(struct sock *sock, int level, int optname,
645 char __user *optval, int __user *optlen,
646 int (*getsockopt)(struct sock *, int, int, char __user *, int __user *))
647 {
648 struct compat_group_filter __user *gf32 = (void *)optval;
649 struct group_filter __user *kgf;
650 int __user *koptlen;
651 u32 interface, fmode, numsrc;
652 int klen, ulen, err;
653
654 if (optname != MCAST_MSFILTER)
655 return getsockopt(sock, level, optname, optval, optlen);
656
657 koptlen = compat_alloc_user_space(sizeof(*koptlen));
658 if (!access_ok(VERIFY_READ, optlen, sizeof(*optlen)) ||
659 __get_user(ulen, optlen))
660 return -EFAULT;
661
662 /* adjust len for pad */
663 klen = ulen + sizeof(*kgf) - sizeof(*gf32);
664
665 if (klen < GROUP_FILTER_SIZE(0))
666 return -EINVAL;
667
668 if (!access_ok(VERIFY_WRITE, koptlen, sizeof(*koptlen)) ||
669 __put_user(klen, koptlen))
670 return -EFAULT;
671
672 /* have to allow space for previous compat_alloc_user_space, too */
673 kgf = compat_alloc_user_space(klen+sizeof(*optlen));
674
675 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) ||
676 __get_user(interface, &gf32->gf_interface) ||
677 __get_user(fmode, &gf32->gf_fmode) ||
678 __get_user(numsrc, &gf32->gf_numsrc) ||
679 __put_user(interface, &kgf->gf_interface) ||
680 __put_user(fmode, &kgf->gf_fmode) ||
681 __put_user(numsrc, &kgf->gf_numsrc) ||
682 copy_in_user(&kgf->gf_group, &gf32->gf_group, sizeof(kgf->gf_group)))
683 return -EFAULT;
684
685 err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen);
686 if (err)
687 return err;
688
689 if (!access_ok(VERIFY_READ, koptlen, sizeof(*koptlen)) ||
690 __get_user(klen, koptlen))
691 return -EFAULT;
692
693 ulen = klen - (sizeof(*kgf)-sizeof(*gf32));
694
695 if (!access_ok(VERIFY_WRITE, optlen, sizeof(*optlen)) ||
696 __put_user(ulen, optlen))
697 return -EFAULT;
698
699 if (!access_ok(VERIFY_READ, kgf, klen) ||
700 !access_ok(VERIFY_WRITE, gf32, ulen) ||
701 __get_user(interface, &kgf->gf_interface) ||
702 __get_user(fmode, &kgf->gf_fmode) ||
703 __get_user(numsrc, &kgf->gf_numsrc) ||
704 __put_user(interface, &gf32->gf_interface) ||
705 __put_user(fmode, &gf32->gf_fmode) ||
706 __put_user(numsrc, &gf32->gf_numsrc))
707 return -EFAULT;
708 if (numsrc) {
709 int copylen;
710
711 klen -= GROUP_FILTER_SIZE(0);
712 copylen = numsrc * sizeof(gf32->gf_slist[0]);
713 if (copylen > klen)
714 copylen = klen;
715 if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen))
716 return -EFAULT;
717 }
718 return err;
719 }
720 EXPORT_SYMBOL(compat_mc_getsockopt);
721
722
723 /* Argument list sizes for compat_sys_socketcall */
724 #define AL(x) ((x) * sizeof(u32))
725 static unsigned char nas[21] = {
726 AL(0), AL(3), AL(3), AL(3), AL(2), AL(3),
727 AL(3), AL(3), AL(4), AL(4), AL(4), AL(6),
728 AL(6), AL(2), AL(5), AL(5), AL(3), AL(3),
729 AL(4), AL(5), AL(4)
730 };
731 #undef AL
732
733 COMPAT_SYSCALL_DEFINE3(sendmsg, int, fd, struct compat_msghdr __user *, msg, unsigned int, flags)
734 {
735 return __sys_sendmsg(fd, (struct user_msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
736 }
737
738 COMPAT_SYSCALL_DEFINE4(sendmmsg, int, fd, struct compat_mmsghdr __user *, mmsg,
739 unsigned int, vlen, unsigned int, flags)
740 {
741 return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
742 flags | MSG_CMSG_COMPAT);
743 }
744
745 COMPAT_SYSCALL_DEFINE3(recvmsg, int, fd, struct compat_msghdr __user *, msg, unsigned int, flags)
746 {
747 return __sys_recvmsg(fd, (struct user_msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
748 }
749
750 COMPAT_SYSCALL_DEFINE4(recv, int, fd, void __user *, buf, compat_size_t, len, unsigned int, flags)
751 {
752 return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT);
753 }
754
755 COMPAT_SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, buf, compat_size_t, len,
756 unsigned int, flags, struct sockaddr __user *, addr,
757 int __user *, addrlen)
758 {
759 return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen);
760 }
761
762 COMPAT_SYSCALL_DEFINE5(recvmmsg, int, fd, struct compat_mmsghdr __user *, mmsg,
763 unsigned int, vlen, unsigned int, flags,
764 struct compat_timespec __user *, timeout)
765 {
766 int datagrams;
767 struct timespec ktspec;
768
769 if (timeout == NULL)
770 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
771 flags | MSG_CMSG_COMPAT, NULL);
772
773 if (compat_get_timespec(&ktspec, timeout))
774 return -EFAULT;
775
776 datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
777 flags | MSG_CMSG_COMPAT, &ktspec);
778 if (datagrams > 0 && compat_put_timespec(&ktspec, timeout))
779 datagrams = -EFAULT;
780
781 return datagrams;
782 }
783
784 COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user *, args)
785 {
786 u32 a[AUDITSC_ARGS];
787 unsigned int len;
788 u32 a0, a1;
789 int ret;
790
791 if (call < SYS_SOCKET || call > SYS_SENDMMSG)
792 return -EINVAL;
793 len = nas[call];
794 if (len > sizeof(a))
795 return -EINVAL;
796
797 if (copy_from_user(a, args, len))
798 return -EFAULT;
799
800 ret = audit_socketcall_compat(len / sizeof(a[0]), a);
801 if (ret)
802 return ret;
803
804 a0 = a[0];
805 a1 = a[1];
806
807 switch (call) {
808 case SYS_SOCKET:
809 ret = sys_socket(a0, a1, a[2]);
810 break;
811 case SYS_BIND:
812 ret = sys_bind(a0, compat_ptr(a1), a[2]);
813 break;
814 case SYS_CONNECT:
815 ret = sys_connect(a0, compat_ptr(a1), a[2]);
816 break;
817 case SYS_LISTEN:
818 ret = sys_listen(a0, a1);
819 break;
820 case SYS_ACCEPT:
821 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0);
822 break;
823 case SYS_GETSOCKNAME:
824 ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
825 break;
826 case SYS_GETPEERNAME:
827 ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2]));
828 break;
829 case SYS_SOCKETPAIR:
830 ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3]));
831 break;
832 case SYS_SEND:
833 ret = sys_send(a0, compat_ptr(a1), a[2], a[3]);
834 break;
835 case SYS_SENDTO:
836 ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]);
837 break;
838 case SYS_RECV:
839 ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]);
840 break;
841 case SYS_RECVFROM:
842 ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3],
843 compat_ptr(a[4]), compat_ptr(a[5]));
844 break;
845 case SYS_SHUTDOWN:
846 ret = sys_shutdown(a0, a1);
847 break;
848 case SYS_SETSOCKOPT:
849 ret = compat_sys_setsockopt(a0, a1, a[2],
850 compat_ptr(a[3]), a[4]);
851 break;
852 case SYS_GETSOCKOPT:
853 ret = compat_sys_getsockopt(a0, a1, a[2],
854 compat_ptr(a[3]), compat_ptr(a[4]));
855 break;
856 case SYS_SENDMSG:
857 ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
858 break;
859 case SYS_SENDMMSG:
860 ret = compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]);
861 break;
862 case SYS_RECVMSG:
863 ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);
864 break;
865 case SYS_RECVMMSG:
866 ret = compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3],
867 compat_ptr(a[4]));
868 break;
869 case SYS_ACCEPT4:
870 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]);
871 break;
872 default:
873 ret = -EINVAL;
874 break;
875 }
876 return ret;
877 }
Linux with added FPC-III support