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isdn divas: fix proc creation
[linux-2.6/sactl.git] / net / compat.c
blobc823f6f290cbf6c6399cfae02f17b940052c2c73
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/fs.h>
16 #include <linux/types.h>
17 #include <linux/file.h>
18 #include <linux/icmpv6.h>
19 #include <linux/socket.h>
20 #include <linux/syscalls.h>
21 #include <linux/filter.h>
22 #include <linux/compat.h>
23 #include <linux/security.h>
24
25 #include <net/scm.h>
26 #include <net/sock.h>
27 #include <net/ip.h>
28 #include <net/ipv6.h>
29 #include <asm/uaccess.h>
30 #include <net/compat.h>
31
32 static inline int iov_from_user_compat_to_kern(struct iovec *kiov,
33 struct compat_iovec __user *uiov32,
34 int niov)
35 {
36 int tot_len = 0;
37
38 while (niov > 0) {
39 compat_uptr_t buf;
40 compat_size_t len;
41
42 if (get_user(len, &uiov32->iov_len) ||
43 get_user(buf, &uiov32->iov_base)) {
44 tot_len = -EFAULT;
45 break;
46 }
47 tot_len += len;
48 kiov->iov_base = compat_ptr(buf);
49 kiov->iov_len = (__kernel_size_t) len;
50 uiov32++;
51 kiov++;
52 niov--;
53 }
54 return tot_len;
55 }
56
57 int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg)
58 {
59 compat_uptr_t tmp1, tmp2, tmp3;
60
61 if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) ||
62 __get_user(tmp1, &umsg->msg_name) ||
63 __get_user(kmsg->msg_namelen, &umsg->msg_namelen) ||
64 __get_user(tmp2, &umsg->msg_iov) ||
65 __get_user(kmsg->msg_iovlen, &umsg->msg_iovlen) ||
66 __get_user(tmp3, &umsg->msg_control) ||
67 __get_user(kmsg->msg_controllen, &umsg->msg_controllen) ||
68 __get_user(kmsg->msg_flags, &umsg->msg_flags))
69 return -EFAULT;
70 kmsg->msg_name = compat_ptr(tmp1);
71 kmsg->msg_iov = compat_ptr(tmp2);
72 kmsg->msg_control = compat_ptr(tmp3);
73 return 0;
74 }
75
76 /* I've named the args so it is easy to tell whose space the pointers are in. */
77 int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov,
78 char *kern_address, int mode)
79 {
80 int tot_len;
81
82 if (kern_msg->msg_namelen) {
83 if (mode==VERIFY_READ) {
84 int err = move_addr_to_kernel(kern_msg->msg_name,
85 kern_msg->msg_namelen,
86 kern_address);
87 if (err < 0)
88 return err;
89 }
90 kern_msg->msg_name = kern_address;
91 } else
92 kern_msg->msg_name = NULL;
93
94 tot_len = iov_from_user_compat_to_kern(kern_iov,
95 (struct compat_iovec __user *)kern_msg->msg_iov,
96 kern_msg->msg_iovlen);
97 if (tot_len >= 0)
98 kern_msg->msg_iov = kern_iov;
99
100 return tot_len;
101 }
102
103 /* Bleech... */
104 #define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32))
105
106 #define CMSG_COMPAT_DATA(cmsg) \
107 ((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr))))
108 #define CMSG_COMPAT_SPACE(len) \
109 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len))
110 #define CMSG_COMPAT_LEN(len) \
111 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len))
112
113 #define CMSG_COMPAT_FIRSTHDR(msg) \
114 (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \
115 (struct compat_cmsghdr __user *)((msg)->msg_control) : \
116 (struct compat_cmsghdr __user *)NULL)
117
118 #define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \
119 ((ucmlen) >= sizeof(struct compat_cmsghdr) && \
120 (ucmlen) <= (unsigned long) \
121 ((mhdr)->msg_controllen - \
122 ((char *)(ucmsg) - (char *)(mhdr)->msg_control)))
123
124 static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg,
125 struct compat_cmsghdr __user *cmsg, int cmsg_len)
126 {
127 char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len);
128 if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) >
129 msg->msg_controllen)
130 return NULL;
131 return (struct compat_cmsghdr __user *)ptr;
132 }
133
134 /* There is a lot of hair here because the alignment rules (and
135 * thus placement) of cmsg headers and length are different for
136 * 32-bit apps. -DaveM
137 */
138 int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk,
139 unsigned char *stackbuf, int stackbuf_size)
140 {
141 struct compat_cmsghdr __user *ucmsg;
142 struct cmsghdr *kcmsg, *kcmsg_base;
143 compat_size_t ucmlen;
144 __kernel_size_t kcmlen, tmp;
145 int err = -EFAULT;
146
147 kcmlen = 0;
148 kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf;
149 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
150 while (ucmsg != NULL) {
151 if (get_user(ucmlen, &ucmsg->cmsg_len))
152 return -EFAULT;
153
154 /* Catch bogons. */
155 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
156 return -EINVAL;
157
158 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
159 CMSG_ALIGN(sizeof(struct cmsghdr)));
160 tmp = CMSG_ALIGN(tmp);
161 kcmlen += tmp;
162 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
163 }
164 if (kcmlen == 0)
165 return -EINVAL;
166
167 /* The kcmlen holds the 64-bit version of the control length.
168 * It may not be modified as we do not stick it into the kmsg
169 * until we have successfully copied over all of the data
170 * from the user.
171 */
172 if (kcmlen > stackbuf_size)
173 kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL);
174 if (kcmsg == NULL)
175 return -ENOBUFS;
176
177 /* Now copy them over neatly. */
178 memset(kcmsg, 0, kcmlen);
179 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
180 while (ucmsg != NULL) {
181 if (__get_user(ucmlen, &ucmsg->cmsg_len))
182 goto Efault;
183 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
184 goto Einval;
185 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
186 CMSG_ALIGN(sizeof(struct cmsghdr)));
187 if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp))
188 goto Einval;
189 kcmsg->cmsg_len = tmp;
190 tmp = CMSG_ALIGN(tmp);
191 if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) ||
192 __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) ||
193 copy_from_user(CMSG_DATA(kcmsg),
194 CMSG_COMPAT_DATA(ucmsg),
195 (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg)))))
196 goto Efault;
197
198 /* Advance. */
199 kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp);
200 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
201 }
202
203 /* Ok, looks like we made it. Hook it up and return success. */
204 kmsg->msg_control = kcmsg_base;
205 kmsg->msg_controllen = kcmlen;
206 return 0;
207
208 Einval:
209 err = -EINVAL;
210 Efault:
211 if (kcmsg_base != (struct cmsghdr *)stackbuf)
212 sock_kfree_s(sk, kcmsg_base, kcmlen);
213 return err;
214 }
215
216 int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data)
217 {
218 struct compat_timeval ctv;
219 struct compat_timespec cts;
220 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
221 struct compat_cmsghdr cmhdr;
222 int cmlen;
223
224 if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) {
225 kmsg->msg_flags |= MSG_CTRUNC;
226 return 0; /* XXX: return error? check spec. */
227 }
228
229 if (level == SOL_SOCKET && type == SO_TIMESTAMP) {
230 struct timeval *tv = (struct timeval *)data;
231 ctv.tv_sec = tv->tv_sec;
232 ctv.tv_usec = tv->tv_usec;
233 data = &ctv;
234 len = sizeof(ctv);
235 }
236 if (level == SOL_SOCKET && type == SO_TIMESTAMPNS) {
237 struct timespec *ts = (struct timespec *)data;
238 cts.tv_sec = ts->tv_sec;
239 cts.tv_nsec = ts->tv_nsec;
240 data = &cts;
241 len = sizeof(cts);
242 }
243
244 cmlen = CMSG_COMPAT_LEN(len);
245 if (kmsg->msg_controllen < cmlen) {
246 kmsg->msg_flags |= MSG_CTRUNC;
247 cmlen = kmsg->msg_controllen;
248 }
249 cmhdr.cmsg_level = level;
250 cmhdr.cmsg_type = type;
251 cmhdr.cmsg_len = cmlen;
252
253 if (copy_to_user(cm, &cmhdr, sizeof cmhdr))
254 return -EFAULT;
255 if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr)))
256 return -EFAULT;
257 cmlen = CMSG_COMPAT_SPACE(len);
258 if (kmsg->msg_controllen < cmlen)
259 cmlen = kmsg->msg_controllen;
260 kmsg->msg_control += cmlen;
261 kmsg->msg_controllen -= cmlen;
262 return 0;
263 }
264
265 void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm)
266 {
267 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
268 int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int);
269 int fdnum = scm->fp->count;
270 struct file **fp = scm->fp->fp;
271 int __user *cmfptr;
272 int err = 0, i;
273
274 if (fdnum < fdmax)
275 fdmax = fdnum;
276
277 for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) {
278 int new_fd;
279 err = security_file_receive(fp[i]);
280 if (err)
281 break;
282 err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags
283 ? O_CLOEXEC : 0);
284 if (err < 0)
285 break;
286 new_fd = err;
287 err = put_user(new_fd, cmfptr);
288 if (err) {
289 put_unused_fd(new_fd);
290 break;
291 }
292 /* Bump the usage count and install the file. */
293 get_file(fp[i]);
294 fd_install(new_fd, fp[i]);
295 }
296
297 if (i > 0) {
298 int cmlen = CMSG_COMPAT_LEN(i * sizeof(int));
299 err = put_user(SOL_SOCKET, &cm->cmsg_level);
300 if (!err)
301 err = put_user(SCM_RIGHTS, &cm->cmsg_type);
302 if (!err)
303 err = put_user(cmlen, &cm->cmsg_len);
304 if (!err) {
305 cmlen = CMSG_COMPAT_SPACE(i * sizeof(int));
306 kmsg->msg_control += cmlen;
307 kmsg->msg_controllen -= cmlen;
308 }
309 }
310 if (i < fdnum)
311 kmsg->msg_flags |= MSG_CTRUNC;
312
313 /*
314 * All of the files that fit in the message have had their
315 * usage counts incremented, so we just free the list.
316 */
317 __scm_destroy(scm);
318 }
319
320 /*
321 * A struct sock_filter is architecture independent.
322 */
323 struct compat_sock_fprog {
324 u16 len;
325 compat_uptr_t filter; /* struct sock_filter * */
326 };
327
328 static int do_set_attach_filter(struct socket *sock, int level, int optname,
329 char __user *optval, int optlen)
330 {
331 struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval;
332 struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog));
333 compat_uptr_t ptr;
334 u16 len;
335
336 if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) ||
337 !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) ||
338 __get_user(len, &fprog32->len) ||
339 __get_user(ptr, &fprog32->filter) ||
340 __put_user(len, &kfprog->len) ||
341 __put_user(compat_ptr(ptr), &kfprog->filter))
342 return -EFAULT;
343
344 return sock_setsockopt(sock, level, optname, (char __user *)kfprog,
345 sizeof(struct sock_fprog));
346 }
347
348 static int do_set_sock_timeout(struct socket *sock, int level,
349 int optname, char __user *optval, int optlen)
350 {
351 struct compat_timeval __user *up = (struct compat_timeval __user *) optval;
352 struct timeval ktime;
353 mm_segment_t old_fs;
354 int err;
355
356 if (optlen < sizeof(*up))
357 return -EINVAL;
358 if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
359 __get_user(ktime.tv_sec, &up->tv_sec) ||
360 __get_user(ktime.tv_usec, &up->tv_usec))
361 return -EFAULT;
362 old_fs = get_fs();
363 set_fs(KERNEL_DS);
364 err = sock_setsockopt(sock, level, optname, (char *) &ktime, sizeof(ktime));
365 set_fs(old_fs);
366
367 return err;
368 }
369
370 static int compat_sock_setsockopt(struct socket *sock, int level, int optname,
371 char __user *optval, int optlen)
372 {
373 if (optname == SO_ATTACH_FILTER)
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 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
383 char __user *optval, int optlen)
384 {
385 int err;
386 struct socket *sock;
387
388 if (optlen < 0)
389 return -EINVAL;
390
391 if ((sock = sockfd_lookup(fd, &err))!=NULL)
392 {
393 err = security_socket_setsockopt(sock,level,optname);
394 if (err) {
395 sockfd_put(sock);
396 return err;
397 }
398
399 if (level == SOL_SOCKET)
400 err = compat_sock_setsockopt(sock, level,
401 optname, optval, optlen);
402 else if (sock->ops->compat_setsockopt)
403 err = sock->ops->compat_setsockopt(sock, level,
404 optname, optval, optlen);
405 else
406 err = sock->ops->setsockopt(sock, level,
407 optname, optval, optlen);
408 sockfd_put(sock);
409 }
410 return err;
411 }
412
413 static int do_get_sock_timeout(struct socket *sock, int level, int optname,
414 char __user *optval, int __user *optlen)
415 {
416 struct compat_timeval __user *up;
417 struct timeval ktime;
418 mm_segment_t old_fs;
419 int len, err;
420
421 up = (struct compat_timeval __user *) optval;
422 if (get_user(len, optlen))
423 return -EFAULT;
424 if (len < sizeof(*up))
425 return -EINVAL;
426 len = sizeof(ktime);
427 old_fs = get_fs();
428 set_fs(KERNEL_DS);
429 err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len);
430 set_fs(old_fs);
431
432 if (!err) {
433 if (put_user(sizeof(*up), optlen) ||
434 !access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
435 __put_user(ktime.tv_sec, &up->tv_sec) ||
436 __put_user(ktime.tv_usec, &up->tv_usec))
437 err = -EFAULT;
438 }
439 return err;
440 }
441
442 static int compat_sock_getsockopt(struct socket *sock, int level, int optname,
443 char __user *optval, int __user *optlen)
444 {
445 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
446 return do_get_sock_timeout(sock, level, optname, optval, optlen);
447 return sock_getsockopt(sock, level, optname, optval, optlen);
448 }
449
450 int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp)
451 {
452 struct compat_timeval __user *ctv =
453 (struct compat_timeval __user*) userstamp;
454 int err = -ENOENT;
455 struct timeval tv;
456
457 if (!sock_flag(sk, SOCK_TIMESTAMP))
458 sock_enable_timestamp(sk);
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 (struct compat_timespec __user*) userstamp;
478 int err = -ENOENT;
479 struct timespec ts;
480
481 if (!sock_flag(sk, SOCK_TIMESTAMP))
482 sock_enable_timestamp(sk);
483 ts = ktime_to_timespec(sk->sk_stamp);
484 if (ts.tv_sec == -1)
485 return err;
486 if (ts.tv_sec == 0) {
487 sk->sk_stamp = ktime_get_real();
488 ts = ktime_to_timespec(sk->sk_stamp);
489 }
490 err = 0;
491 if (put_user(ts.tv_sec, &ctv->tv_sec) ||
492 put_user(ts.tv_nsec, &ctv->tv_nsec))
493 err = -EFAULT;
494 return err;
495 }
496 EXPORT_SYMBOL(compat_sock_get_timestampns);
497
498 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
499 char __user *optval, int __user *optlen)
500 {
501 int err;
502 struct socket *sock;
503
504 if ((sock = sockfd_lookup(fd, &err))!=NULL)
505 {
506 err = security_socket_getsockopt(sock, level,
507 optname);
508 if (err) {
509 sockfd_put(sock);
510 return err;
511 }
512
513 if (level == SOL_SOCKET)
514 err = compat_sock_getsockopt(sock, level,
515 optname, optval, optlen);
516 else if (sock->ops->compat_getsockopt)
517 err = sock->ops->compat_getsockopt(sock, level,
518 optname, optval, optlen);
519 else
520 err = sock->ops->getsockopt(sock, level,
521 optname, optval, optlen);
522 sockfd_put(sock);
523 }
524 return err;
525 }
526
527 struct compat_group_req {
528 __u32 gr_interface;
529 struct __kernel_sockaddr_storage gr_group
530 __attribute__ ((aligned(4)));
531 } __attribute__ ((packed));
532
533 struct compat_group_source_req {
534 __u32 gsr_interface;
535 struct __kernel_sockaddr_storage gsr_group
536 __attribute__ ((aligned(4)));
537 struct __kernel_sockaddr_storage gsr_source
538 __attribute__ ((aligned(4)));
539 } __attribute__ ((packed));
540
541 struct compat_group_filter {
542 __u32 gf_interface;
543 struct __kernel_sockaddr_storage gf_group
544 __attribute__ ((aligned(4)));
545 __u32 gf_fmode;
546 __u32 gf_numsrc;
547 struct __kernel_sockaddr_storage gf_slist[1]
548 __attribute__ ((aligned(4)));
549 } __attribute__ ((packed));
550
551 #define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \
552 sizeof(struct __kernel_sockaddr_storage))
553
554
555 int compat_mc_setsockopt(struct sock *sock, int level, int optname,
556 char __user *optval, int optlen,
557 int (*setsockopt)(struct sock *,int,int,char __user *,int))
558 {
559 char __user *koptval = optval;
560 int koptlen = optlen;
561
562 switch (optname) {
563 case MCAST_JOIN_GROUP:
564 case MCAST_LEAVE_GROUP:
565 {
566 struct compat_group_req __user *gr32 = (void *)optval;
567 struct group_req __user *kgr =
568 compat_alloc_user_space(sizeof(struct group_req));
569 u32 interface;
570
571 if (!access_ok(VERIFY_READ, gr32, sizeof(*gr32)) ||
572 !access_ok(VERIFY_WRITE, kgr, sizeof(struct group_req)) ||
573 __get_user(interface, &gr32->gr_interface) ||
574 __put_user(interface, &kgr->gr_interface) ||
575 copy_in_user(&kgr->gr_group, &gr32->gr_group,
576 sizeof(kgr->gr_group)))
577 return -EFAULT;
578 koptval = (char __user *)kgr;
579 koptlen = sizeof(struct group_req);
580 break;
581 }
582 case MCAST_JOIN_SOURCE_GROUP:
583 case MCAST_LEAVE_SOURCE_GROUP:
584 case MCAST_BLOCK_SOURCE:
585 case MCAST_UNBLOCK_SOURCE:
586 {
587 struct compat_group_source_req __user *gsr32 = (void *)optval;
588 struct group_source_req __user *kgsr = compat_alloc_user_space(
589 sizeof(struct group_source_req));
590 u32 interface;
591
592 if (!access_ok(VERIFY_READ, gsr32, sizeof(*gsr32)) ||
593 !access_ok(VERIFY_WRITE, kgsr,
594 sizeof(struct group_source_req)) ||
595 __get_user(interface, &gsr32->gsr_interface) ||
596 __put_user(interface, &kgsr->gsr_interface) ||
597 copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group,
598 sizeof(kgsr->gsr_group)) ||
599 copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source,
600 sizeof(kgsr->gsr_source)))
601 return -EFAULT;
602 koptval = (char __user *)kgsr;
603 koptlen = sizeof(struct group_source_req);
604 break;
605 }
606 case MCAST_MSFILTER:
607 {
608 struct compat_group_filter __user *gf32 = (void *)optval;
609 struct group_filter __user *kgf;
610 u32 interface, fmode, numsrc;
611
612 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) ||
613 __get_user(interface, &gf32->gf_interface) ||
614 __get_user(fmode, &gf32->gf_fmode) ||
615 __get_user(numsrc, &gf32->gf_numsrc))
616 return -EFAULT;
617 koptlen = optlen + sizeof(struct group_filter) -
618 sizeof(struct compat_group_filter);
619 if (koptlen < GROUP_FILTER_SIZE(numsrc))
620 return -EINVAL;
621 kgf = compat_alloc_user_space(koptlen);
622 if (!access_ok(VERIFY_WRITE, kgf, koptlen) ||
623 __put_user(interface, &kgf->gf_interface) ||
624 __put_user(fmode, &kgf->gf_fmode) ||
625 __put_user(numsrc, &kgf->gf_numsrc) ||
626 copy_in_user(&kgf->gf_group, &gf32->gf_group,
627 sizeof(kgf->gf_group)) ||
628 (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist,
629 numsrc * sizeof(kgf->gf_slist[0]))))
630 return -EFAULT;
631 koptval = (char __user *)kgf;
632 break;
633 }
634
635 default:
636 break;
637 }
638 return setsockopt(sock, level, optname, koptval, koptlen);
639 }
640
641 EXPORT_SYMBOL(compat_mc_setsockopt);
642
643 int compat_mc_getsockopt(struct sock *sock, int level, int optname,
644 char __user *optval, int __user *optlen,
645 int (*getsockopt)(struct sock *,int,int,char __user *,int __user *))
646 {
647 struct compat_group_filter __user *gf32 = (void *)optval;
648 struct group_filter __user *kgf;
649 int __user *koptlen;
650 u32 interface, fmode, numsrc;
651 int klen, ulen, err;
652
653 if (optname != MCAST_MSFILTER)
654 return getsockopt(sock, level, optname, optval, optlen);
655
656 koptlen = compat_alloc_user_space(sizeof(*koptlen));
657 if (!access_ok(VERIFY_READ, optlen, sizeof(*optlen)) ||
658 __get_user(ulen, optlen))
659 return -EFAULT;
660
661 /* adjust len for pad */
662 klen = ulen + sizeof(*kgf) - sizeof(*gf32);
663
664 if (klen < GROUP_FILTER_SIZE(0))
665 return -EINVAL;
666
667 if (!access_ok(VERIFY_WRITE, koptlen, sizeof(*koptlen)) ||
668 __put_user(klen, koptlen))
669 return -EFAULT;
670
671 /* have to allow space for previous compat_alloc_user_space, too */
672 kgf = compat_alloc_user_space(klen+sizeof(*optlen));
673
674 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) ||
675 __get_user(interface, &gf32->gf_interface) ||
676 __get_user(fmode, &gf32->gf_fmode) ||
677 __get_user(numsrc, &gf32->gf_numsrc) ||
678 __put_user(interface, &kgf->gf_interface) ||
679 __put_user(fmode, &kgf->gf_fmode) ||
680 __put_user(numsrc, &kgf->gf_numsrc) ||
681 copy_in_user(&kgf->gf_group,&gf32->gf_group,sizeof(kgf->gf_group)))
682 return -EFAULT;
683
684 err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen);
685 if (err)
686 return err;
687
688 if (!access_ok(VERIFY_READ, koptlen, sizeof(*koptlen)) ||
689 __get_user(klen, koptlen))
690 return -EFAULT;
691
692 ulen = klen - (sizeof(*kgf)-sizeof(*gf32));
693
694 if (!access_ok(VERIFY_WRITE, optlen, sizeof(*optlen)) ||
695 __put_user(ulen, optlen))
696 return -EFAULT;
697
698 if (!access_ok(VERIFY_READ, kgf, klen) ||
699 !access_ok(VERIFY_WRITE, gf32, ulen) ||
700 __get_user(interface, &kgf->gf_interface) ||
701 __get_user(fmode, &kgf->gf_fmode) ||
702 __get_user(numsrc, &kgf->gf_numsrc) ||
703 __put_user(interface, &gf32->gf_interface) ||
704 __put_user(fmode, &gf32->gf_fmode) ||
705 __put_user(numsrc, &gf32->gf_numsrc))
706 return -EFAULT;
707 if (numsrc) {
708 int copylen;
709
710 klen -= GROUP_FILTER_SIZE(0);
711 copylen = numsrc * sizeof(gf32->gf_slist[0]);
712 if (copylen > klen)
713 copylen = klen;
714 if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen))
715 return -EFAULT;
716 }
717 return err;
718 }
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[18]={AL(0),AL(3),AL(3),AL(3),AL(2),AL(3),
726 AL(3),AL(3),AL(4),AL(4),AL(4),AL(6),
727 AL(6),AL(2),AL(5),AL(5),AL(3),AL(3)};
728 #undef AL
729
730 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned flags)
731 {
732 return sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
733 }
734
735 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags)
736 {
737 return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
738 }
739
740 asmlinkage long compat_sys_socketcall(int call, u32 __user *args)
741 {
742 int ret;
743 u32 a[6];
744 u32 a0, a1;
745
746 if (call < SYS_SOCKET || call > SYS_RECVMSG)
747 return -EINVAL;
748 if (copy_from_user(a, args, nas[call]))
749 return -EFAULT;
750 a0 = a[0];
751 a1 = a[1];
752
753 switch (call) {
754 case SYS_SOCKET:
755 ret = sys_socket(a0, a1, a[2]);
756 break;
757 case SYS_BIND:
758 ret = sys_bind(a0, compat_ptr(a1), a[2]);
759 break;
760 case SYS_CONNECT:
761 ret = sys_connect(a0, compat_ptr(a1), a[2]);
762 break;
763 case SYS_LISTEN:
764 ret = sys_listen(a0, a1);
765 break;
766 case SYS_ACCEPT:
767 ret = sys_accept(a0, compat_ptr(a1), compat_ptr(a[2]));
768 break;
769 case SYS_GETSOCKNAME:
770 ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
771 break;
772 case SYS_GETPEERNAME:
773 ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2]));
774 break;
775 case SYS_SOCKETPAIR:
776 ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3]));
777 break;
778 case SYS_SEND:
779 ret = sys_send(a0, compat_ptr(a1), a[2], a[3]);
780 break;
781 case SYS_SENDTO:
782 ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]);
783 break;
784 case SYS_RECV:
785 ret = sys_recv(a0, compat_ptr(a1), a[2], a[3]);
786 break;
787 case SYS_RECVFROM:
788 ret = sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), compat_ptr(a[5]));
789 break;
790 case SYS_SHUTDOWN:
791 ret = sys_shutdown(a0,a1);
792 break;
793 case SYS_SETSOCKOPT:
794 ret = compat_sys_setsockopt(a0, a1, a[2],
795 compat_ptr(a[3]), a[4]);
796 break;
797 case SYS_GETSOCKOPT:
798 ret = compat_sys_getsockopt(a0, a1, a[2],
799 compat_ptr(a[3]), compat_ptr(a[4]));
800 break;
801 case SYS_SENDMSG:
802 ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
803 break;
804 case SYS_RECVMSG:
805 ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);
806 break;
807 default:
808 ret = -EINVAL;
809 break;
810 }
811 return ret;
812 }
SocketAccessConTroL development