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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 <asm/uaccess.h>
33#include <net/compat.h>
34
35static inline int iov_from_user_compat_to_kern(struct iovec *kiov,
36 struct compat_iovec __user *uiov32,
37 int niov)
38{
39 int tot_len = 0;
40
41 while (niov > 0) {
42 compat_uptr_t buf;
43 compat_size_t len;
44
45 if (get_user(len, &uiov32->iov_len) ||
46 get_user(buf, &uiov32->iov_base))
47 return -EFAULT;
48
49 if (len > INT_MAX - tot_len)
50 len = INT_MAX - tot_len;
51
52 tot_len += len;
53 kiov->iov_base = compat_ptr(buf);
54 kiov->iov_len = (__kernel_size_t) len;
55 uiov32++;
56 kiov++;
57 niov--;
58 }
59 return tot_len;
60}
61
62int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg)
63{
64 compat_uptr_t tmp1, tmp2, tmp3;
65
66 if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) ||
67 __get_user(tmp1, &umsg->msg_name) ||
68 __get_user(kmsg->msg_namelen, &umsg->msg_namelen) ||
69 __get_user(tmp2, &umsg->msg_iov) ||
70 __get_user(kmsg->msg_iovlen, &umsg->msg_iovlen) ||
71 __get_user(tmp3, &umsg->msg_control) ||
72 __get_user(kmsg->msg_controllen, &umsg->msg_controllen) ||
73 __get_user(kmsg->msg_flags, &umsg->msg_flags))
74 return -EFAULT;
75 if (kmsg->msg_namelen > sizeof(struct sockaddr_storage))
76 kmsg->msg_namelen = sizeof(struct sockaddr_storage);
77 kmsg->msg_name = compat_ptr(tmp1);
78 kmsg->msg_iov = compat_ptr(tmp2);
79 kmsg->msg_control = compat_ptr(tmp3);
80 return 0;
81}
82
83
84int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov,
85 struct sockaddr_storage *kern_address, int mode)
86{
87 int tot_len;
88
89 if (kern_msg->msg_name && kern_msg->msg_namelen) {
90 if (mode == VERIFY_READ) {
91 int err = move_addr_to_kernel(kern_msg->msg_name,
92 kern_msg->msg_namelen,
93 kern_address);
94 if (err < 0)
95 return err;
96 }
97 kern_msg->msg_name = kern_address;
98 } else {
99 kern_msg->msg_name = NULL;
100 kern_msg->msg_namelen = 0;
101 }
102
103 tot_len = iov_from_user_compat_to_kern(kern_iov,
104 (struct compat_iovec __user *)kern_msg->msg_iov,
105 kern_msg->msg_iovlen);
106 if (tot_len >= 0)
107 kern_msg->msg_iov = kern_iov;
108
109 return tot_len;
110}
111
112
113#define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32))
114
115#define CMSG_COMPAT_DATA(cmsg) \
116 ((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr))))
117#define CMSG_COMPAT_SPACE(len) \
118 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len))
119#define CMSG_COMPAT_LEN(len) \
120 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len))
121
122#define CMSG_COMPAT_FIRSTHDR(msg) \
123 (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \
124 (struct compat_cmsghdr __user *)((msg)->msg_control) : \
125 (struct compat_cmsghdr __user *)NULL)
126
127#define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \
128 ((ucmlen) >= sizeof(struct compat_cmsghdr) && \
129 (ucmlen) <= (unsigned long) \
130 ((mhdr)->msg_controllen - \
131 ((char *)(ucmsg) - (char *)(mhdr)->msg_control)))
132
133static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg,
134 struct compat_cmsghdr __user *cmsg, int cmsg_len)
135{
136 char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len);
137 if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) >
138 msg->msg_controllen)
139 return NULL;
140 return (struct compat_cmsghdr __user *)ptr;
141}
142
143
144
145
146
147int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk,
148 unsigned char *stackbuf, int stackbuf_size)
149{
150 struct compat_cmsghdr __user *ucmsg;
151 struct cmsghdr *kcmsg, *kcmsg_base;
152 compat_size_t ucmlen;
153 __kernel_size_t kcmlen, tmp;
154 int err = -EFAULT;
155
156 kcmlen = 0;
157 kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf;
158 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
159 while (ucmsg != NULL) {
160 if (get_user(ucmlen, &ucmsg->cmsg_len))
161 return -EFAULT;
162
163
164 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
165 return -EINVAL;
166
167 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
168 CMSG_ALIGN(sizeof(struct cmsghdr)));
169 tmp = CMSG_ALIGN(tmp);
170 kcmlen += tmp;
171 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
172 }
173 if (kcmlen == 0)
174 return -EINVAL;
175
176
177
178
179
180
181 if (kcmlen > stackbuf_size)
182 kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL);
183 if (kcmsg == NULL)
184 return -ENOBUFS;
185
186
187 memset(kcmsg, 0, kcmlen);
188 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
189 while (ucmsg != NULL) {
190 if (__get_user(ucmlen, &ucmsg->cmsg_len))
191 goto Efault;
192 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
193 goto Einval;
194 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
195 CMSG_ALIGN(sizeof(struct cmsghdr)));
196 if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp))
197 goto Einval;
198 kcmsg->cmsg_len = tmp;
199 tmp = CMSG_ALIGN(tmp);
200 if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) ||
201 __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) ||
202 copy_from_user(CMSG_DATA(kcmsg),
203 CMSG_COMPAT_DATA(ucmsg),
204 (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg)))))
205 goto Efault;
206
207
208 kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp);
209 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
210 }
211
212
213 kmsg->msg_control = kcmsg_base;
214 kmsg->msg_controllen = kcmlen;
215 return 0;
216
217Einval:
218 err = -EINVAL;
219Efault:
220 if (kcmsg_base != (struct cmsghdr *)stackbuf)
221 sock_kfree_s(sk, kcmsg_base, kcmlen);
222 return err;
223}
224
225int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data)
226{
227 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
228 struct compat_cmsghdr cmhdr;
229 struct compat_timeval ctv;
230 struct compat_timespec cts[3];
231 int cmlen;
232
233 if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) {
234 kmsg->msg_flags |= MSG_CTRUNC;
235 return 0;
236 }
237
238 if (!COMPAT_USE_64BIT_TIME) {
239 if (level == SOL_SOCKET && type == SCM_TIMESTAMP) {
240 struct timeval *tv = (struct timeval *)data;
241 ctv.tv_sec = tv->tv_sec;
242 ctv.tv_usec = tv->tv_usec;
243 data = &ctv;
244 len = sizeof(ctv);
245 }
246 if (level == SOL_SOCKET &&
247 (type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) {
248 int count = type == SCM_TIMESTAMPNS ? 1 : 3;
249 int i;
250 struct timespec *ts = (struct timespec *)data;
251 for (i = 0; i < count; i++) {
252 cts[i].tv_sec = ts[i].tv_sec;
253 cts[i].tv_nsec = ts[i].tv_nsec;
254 }
255 data = &cts;
256 len = sizeof(cts[0]) * count;
257 }
258 }
259
260 cmlen = CMSG_COMPAT_LEN(len);
261 if (kmsg->msg_controllen < cmlen) {
262 kmsg->msg_flags |= MSG_CTRUNC;
263 cmlen = kmsg->msg_controllen;
264 }
265 cmhdr.cmsg_level = level;
266 cmhdr.cmsg_type = type;
267 cmhdr.cmsg_len = cmlen;
268
269 if (copy_to_user(cm, &cmhdr, sizeof cmhdr))
270 return -EFAULT;
271 if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr)))
272 return -EFAULT;
273 cmlen = CMSG_COMPAT_SPACE(len);
274 if (kmsg->msg_controllen < cmlen)
275 cmlen = kmsg->msg_controllen;
276 kmsg->msg_control += cmlen;
277 kmsg->msg_controllen -= cmlen;
278 return 0;
279}
280
281void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm)
282{
283 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
284 int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int);
285 int fdnum = scm->fp->count;
286 struct file **fp = scm->fp->fp;
287 int __user *cmfptr;
288 int err = 0, i;
289
290 if (fdnum < fdmax)
291 fdmax = fdnum;
292
293 for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) {
294 int new_fd;
295 err = security_file_receive(fp[i]);
296 if (err)
297 break;
298 err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags
299 ? O_CLOEXEC : 0);
300 if (err < 0)
301 break;
302 new_fd = err;
303 err = put_user(new_fd, cmfptr);
304 if (err) {
305 put_unused_fd(new_fd);
306 break;
307 }
308
309 fd_install(new_fd, get_file(fp[i]));
310 }
311
312 if (i > 0) {
313 int cmlen = CMSG_COMPAT_LEN(i * sizeof(int));
314 err = put_user(SOL_SOCKET, &cm->cmsg_level);
315 if (!err)
316 err = put_user(SCM_RIGHTS, &cm->cmsg_type);
317 if (!err)
318 err = put_user(cmlen, &cm->cmsg_len);
319 if (!err) {
320 cmlen = CMSG_COMPAT_SPACE(i * sizeof(int));
321 kmsg->msg_control += cmlen;
322 kmsg->msg_controllen -= cmlen;
323 }
324 }
325 if (i < fdnum)
326 kmsg->msg_flags |= MSG_CTRUNC;
327
328
329
330
331
332 __scm_destroy(scm);
333}
334
335static int do_set_attach_filter(struct socket *sock, int level, int optname,
336 char __user *optval, unsigned int optlen)
337{
338 struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval;
339 struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog));
340 compat_uptr_t ptr;
341 u16 len;
342
343 if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) ||
344 !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) ||
345 __get_user(len, &fprog32->len) ||
346 __get_user(ptr, &fprog32->filter) ||
347 __put_user(len, &kfprog->len) ||
348 __put_user(compat_ptr(ptr), &kfprog->filter))
349 return -EFAULT;
350
351 return sock_setsockopt(sock, level, optname, (char __user *)kfprog,
352 sizeof(struct sock_fprog));
353}
354
355static int do_set_sock_timeout(struct socket *sock, int level,
356 int optname, char __user *optval, unsigned int optlen)
357{
358 struct compat_timeval __user *up = (struct compat_timeval __user *)optval;
359 struct timeval ktime;
360 mm_segment_t old_fs;
361 int err;
362
363 if (optlen < sizeof(*up))
364 return -EINVAL;
365 if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
366 __get_user(ktime.tv_sec, &up->tv_sec) ||
367 __get_user(ktime.tv_usec, &up->tv_usec))
368 return -EFAULT;
369 old_fs = get_fs();
370 set_fs(KERNEL_DS);
371 err = sock_setsockopt(sock, level, optname, (char *)&ktime, sizeof(ktime));
372 set_fs(old_fs);
373
374 return err;
375}
376
377static int compat_sock_setsockopt(struct socket *sock, int level, int optname,
378 char __user *optval, unsigned int optlen)
379{
380 if (optname == SO_ATTACH_FILTER)
381 return do_set_attach_filter(sock, level, optname,
382 optval, optlen);
383 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
384 return do_set_sock_timeout(sock, level, optname, optval, optlen);
385
386 return sock_setsockopt(sock, level, optname, optval, optlen);
387}
388
389asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
390 char __user *optval, unsigned int optlen)
391{
392 int err;
393 struct socket *sock = sockfd_lookup(fd, &err);
394
395 if (sock) {
396 err = security_socket_setsockopt(sock, level, optname);
397 if (err) {
398 sockfd_put(sock);
399 return err;
400 }
401
402 if (level == SOL_SOCKET)
403 err = compat_sock_setsockopt(sock, level,
404 optname, optval, optlen);
405 else if (sock->ops->compat_setsockopt)
406 err = sock->ops->compat_setsockopt(sock, level,
407 optname, optval, optlen);
408 else
409 err = sock->ops->setsockopt(sock, level,
410 optname, optval, optlen);
411 sockfd_put(sock);
412 }
413 return err;
414}
415
416static int do_get_sock_timeout(struct socket *sock, int level, int optname,
417 char __user *optval, int __user *optlen)
418{
419 struct compat_timeval __user *up;
420 struct timeval ktime;
421 mm_segment_t old_fs;
422 int len, err;
423
424 up = (struct compat_timeval __user *) optval;
425 if (get_user(len, optlen))
426 return -EFAULT;
427 if (len < sizeof(*up))
428 return -EINVAL;
429 len = sizeof(ktime);
430 old_fs = get_fs();
431 set_fs(KERNEL_DS);
432 err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len);
433 set_fs(old_fs);
434
435 if (!err) {
436 if (put_user(sizeof(*up), optlen) ||
437 !access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
438 __put_user(ktime.tv_sec, &up->tv_sec) ||
439 __put_user(ktime.tv_usec, &up->tv_usec))
440 err = -EFAULT;
441 }
442 return err;
443}
444
445static int compat_sock_getsockopt(struct socket *sock, int level, int optname,
446 char __user *optval, int __user *optlen)
447{
448 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
449 return do_get_sock_timeout(sock, level, optname, optval, optlen);
450 return sock_getsockopt(sock, level, optname, optval, optlen);
451}
452
453int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp)
454{
455 struct compat_timeval __user *ctv;
456 int err;
457 struct timeval tv;
458
459 if (COMPAT_USE_64BIT_TIME)
460 return sock_get_timestamp(sk, userstamp);
461
462 ctv = (struct compat_timeval __user *) userstamp;
463 err = -ENOENT;
464 if (!sock_flag(sk, SOCK_TIMESTAMP))
465 sock_enable_timestamp(sk, SOCK_TIMESTAMP);
466 tv = ktime_to_timeval(sk->sk_stamp);
467 if (tv.tv_sec == -1)
468 return err;
469 if (tv.tv_sec == 0) {
470 sk->sk_stamp = ktime_get_real();
471 tv = ktime_to_timeval(sk->sk_stamp);
472 }
473 err = 0;
474 if (put_user(tv.tv_sec, &ctv->tv_sec) ||
475 put_user(tv.tv_usec, &ctv->tv_usec))
476 err = -EFAULT;
477 return err;
478}
479EXPORT_SYMBOL(compat_sock_get_timestamp);
480
481int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp)
482{
483 struct compat_timespec __user *ctv;
484 int err;
485 struct timespec ts;
486
487 if (COMPAT_USE_64BIT_TIME)
488 return sock_get_timestampns (sk, userstamp);
489
490 ctv = (struct compat_timespec __user *) userstamp;
491 err = -ENOENT;
492 if (!sock_flag(sk, SOCK_TIMESTAMP))
493 sock_enable_timestamp(sk, SOCK_TIMESTAMP);
494 ts = ktime_to_timespec(sk->sk_stamp);
495 if (ts.tv_sec == -1)
496 return err;
497 if (ts.tv_sec == 0) {
498 sk->sk_stamp = ktime_get_real();
499 ts = ktime_to_timespec(sk->sk_stamp);
500 }
501 err = 0;
502 if (put_user(ts.tv_sec, &ctv->tv_sec) ||
503 put_user(ts.tv_nsec, &ctv->tv_nsec))
504 err = -EFAULT;
505 return err;
506}
507EXPORT_SYMBOL(compat_sock_get_timestampns);
508
509asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
510 char __user *optval, int __user *optlen)
511{
512 int err;
513 struct socket *sock = sockfd_lookup(fd, &err);
514
515 if (sock) {
516 err = security_socket_getsockopt(sock, level, optname);
517 if (err) {
518 sockfd_put(sock);
519 return err;
520 }
521
522 if (level == SOL_SOCKET)
523 err = compat_sock_getsockopt(sock, level,
524 optname, optval, optlen);
525 else if (sock->ops->compat_getsockopt)
526 err = sock->ops->compat_getsockopt(sock, level,
527 optname, optval, optlen);
528 else
529 err = sock->ops->getsockopt(sock, level,
530 optname, optval, optlen);
531 sockfd_put(sock);
532 }
533 return err;
534}
535
536struct compat_group_req {
537 __u32 gr_interface;
538 struct __kernel_sockaddr_storage gr_group
539 __attribute__ ((aligned(4)));
540} __packed;
541
542struct compat_group_source_req {
543 __u32 gsr_interface;
544 struct __kernel_sockaddr_storage gsr_group
545 __attribute__ ((aligned(4)));
546 struct __kernel_sockaddr_storage gsr_source
547 __attribute__ ((aligned(4)));
548} __packed;
549
550struct compat_group_filter {
551 __u32 gf_interface;
552 struct __kernel_sockaddr_storage gf_group
553 __attribute__ ((aligned(4)));
554 __u32 gf_fmode;
555 __u32 gf_numsrc;
556 struct __kernel_sockaddr_storage gf_slist[1]
557 __attribute__ ((aligned(4)));
558} __packed;
559
560#define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \
561 sizeof(struct __kernel_sockaddr_storage))
562
563
564int compat_mc_setsockopt(struct sock *sock, int level, int optname,
565 char __user *optval, unsigned int optlen,
566 int (*setsockopt)(struct sock *, int, int, char __user *, unsigned int))
567{
568 char __user *koptval = optval;
569 int koptlen = optlen;
570
571 switch (optname) {
572 case MCAST_JOIN_GROUP:
573 case MCAST_LEAVE_GROUP:
574 {
575 struct compat_group_req __user *gr32 = (void *)optval;
576 struct group_req __user *kgr =
577 compat_alloc_user_space(sizeof(struct group_req));
578 u32 interface;
579
580 if (!access_ok(VERIFY_READ, gr32, sizeof(*gr32)) ||
581 !access_ok(VERIFY_WRITE, kgr, sizeof(struct group_req)) ||
582 __get_user(interface, &gr32->gr_interface) ||
583 __put_user(interface, &kgr->gr_interface) ||
584 copy_in_user(&kgr->gr_group, &gr32->gr_group,
585 sizeof(kgr->gr_group)))
586 return -EFAULT;
587 koptval = (char __user *)kgr;
588 koptlen = sizeof(struct group_req);
589 break;
590 }
591 case MCAST_JOIN_SOURCE_GROUP:
592 case MCAST_LEAVE_SOURCE_GROUP:
593 case MCAST_BLOCK_SOURCE:
594 case MCAST_UNBLOCK_SOURCE:
595 {
596 struct compat_group_source_req __user *gsr32 = (void *)optval;
597 struct group_source_req __user *kgsr = compat_alloc_user_space(
598 sizeof(struct group_source_req));
599 u32 interface;
600
601 if (!access_ok(VERIFY_READ, gsr32, sizeof(*gsr32)) ||
602 !access_ok(VERIFY_WRITE, kgsr,
603 sizeof(struct group_source_req)) ||
604 __get_user(interface, &gsr32->gsr_interface) ||
605 __put_user(interface, &kgsr->gsr_interface) ||
606 copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group,
607 sizeof(kgsr->gsr_group)) ||
608 copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source,
609 sizeof(kgsr->gsr_source)))
610 return -EFAULT;
611 koptval = (char __user *)kgsr;
612 koptlen = sizeof(struct group_source_req);
613 break;
614 }
615 case MCAST_MSFILTER:
616 {
617 struct compat_group_filter __user *gf32 = (void *)optval;
618 struct group_filter __user *kgf;
619 u32 interface, fmode, numsrc;
620
621 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) ||
622 __get_user(interface, &gf32->gf_interface) ||
623 __get_user(fmode, &gf32->gf_fmode) ||
624 __get_user(numsrc, &gf32->gf_numsrc))
625 return -EFAULT;
626 koptlen = optlen + sizeof(struct group_filter) -
627 sizeof(struct compat_group_filter);
628 if (koptlen < GROUP_FILTER_SIZE(numsrc))
629 return -EINVAL;
630 kgf = compat_alloc_user_space(koptlen);
631 if (!access_ok(VERIFY_WRITE, kgf, koptlen) ||
632 __put_user(interface, &kgf->gf_interface) ||
633 __put_user(fmode, &kgf->gf_fmode) ||
634 __put_user(numsrc, &kgf->gf_numsrc) ||
635 copy_in_user(&kgf->gf_group, &gf32->gf_group,
636 sizeof(kgf->gf_group)) ||
637 (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist,
638 numsrc * sizeof(kgf->gf_slist[0]))))
639 return -EFAULT;
640 koptval = (char __user *)kgf;
641 break;
642 }
643
644 default:
645 break;
646 }
647 return setsockopt(sock, level, optname, koptval, koptlen);
648}
649EXPORT_SYMBOL(compat_mc_setsockopt);
650
651int compat_mc_getsockopt(struct sock *sock, int level, int optname,
652 char __user *optval, int __user *optlen,
653 int (*getsockopt)(struct sock *, int, int, char __user *, int __user *))
654{
655 struct compat_group_filter __user *gf32 = (void *)optval;
656 struct group_filter __user *kgf;
657 int __user *koptlen;
658 u32 interface, fmode, numsrc;
659 int klen, ulen, err;
660
661 if (optname != MCAST_MSFILTER)
662 return getsockopt(sock, level, optname, optval, optlen);
663
664 koptlen = compat_alloc_user_space(sizeof(*koptlen));
665 if (!access_ok(VERIFY_READ, optlen, sizeof(*optlen)) ||
666 __get_user(ulen, optlen))
667 return -EFAULT;
668
669
670 klen = ulen + sizeof(*kgf) - sizeof(*gf32);
671
672 if (klen < GROUP_FILTER_SIZE(0))
673 return -EINVAL;
674
675 if (!access_ok(VERIFY_WRITE, koptlen, sizeof(*koptlen)) ||
676 __put_user(klen, koptlen))
677 return -EFAULT;
678
679
680 kgf = compat_alloc_user_space(klen+sizeof(*optlen));
681
682 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) ||
683 __get_user(interface, &gf32->gf_interface) ||
684 __get_user(fmode, &gf32->gf_fmode) ||
685 __get_user(numsrc, &gf32->gf_numsrc) ||
686 __put_user(interface, &kgf->gf_interface) ||
687 __put_user(fmode, &kgf->gf_fmode) ||
688 __put_user(numsrc, &kgf->gf_numsrc) ||
689 copy_in_user(&kgf->gf_group, &gf32->gf_group, sizeof(kgf->gf_group)))
690 return -EFAULT;
691
692 err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen);
693 if (err)
694 return err;
695
696 if (!access_ok(VERIFY_READ, koptlen, sizeof(*koptlen)) ||
697 __get_user(klen, koptlen))
698 return -EFAULT;
699
700 ulen = klen - (sizeof(*kgf)-sizeof(*gf32));
701
702 if (!access_ok(VERIFY_WRITE, optlen, sizeof(*optlen)) ||
703 __put_user(ulen, optlen))
704 return -EFAULT;
705
706 if (!access_ok(VERIFY_READ, kgf, klen) ||
707 !access_ok(VERIFY_WRITE, gf32, ulen) ||
708 __get_user(interface, &kgf->gf_interface) ||
709 __get_user(fmode, &kgf->gf_fmode) ||
710 __get_user(numsrc, &kgf->gf_numsrc) ||
711 __put_user(interface, &gf32->gf_interface) ||
712 __put_user(fmode, &gf32->gf_fmode) ||
713 __put_user(numsrc, &gf32->gf_numsrc))
714 return -EFAULT;
715 if (numsrc) {
716 int copylen;
717
718 klen -= GROUP_FILTER_SIZE(0);
719 copylen = numsrc * sizeof(gf32->gf_slist[0]);
720 if (copylen > klen)
721 copylen = klen;
722 if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen))
723 return -EFAULT;
724 }
725 return err;
726}
727EXPORT_SYMBOL(compat_mc_getsockopt);
728
729
730
731#define AL(x) ((x) * sizeof(u32))
732static unsigned char nas[21] = {
733 AL(0), AL(3), AL(3), AL(3), AL(2), AL(3),
734 AL(3), AL(3), AL(4), AL(4), AL(4), AL(6),
735 AL(6), AL(2), AL(5), AL(5), AL(3), AL(3),
736 AL(4), AL(5), AL(4)
737};
738#undef AL
739
740asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags)
741{
742 if (flags & MSG_CMSG_COMPAT)
743 return -EINVAL;
744 return __sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
745}
746
747asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
748 unsigned int vlen, unsigned int flags)
749{
750 if (flags & MSG_CMSG_COMPAT)
751 return -EINVAL;
752 return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
753 flags | MSG_CMSG_COMPAT);
754}
755
756asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags)
757{
758 if (flags & MSG_CMSG_COMPAT)
759 return -EINVAL;
760 return __sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
761}
762
763asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len, unsigned int flags)
764{
765 return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT);
766}
767
768asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, size_t len,
769 unsigned int flags, struct sockaddr __user *addr,
770 int __user *addrlen)
771{
772 return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen);
773}
774
775asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
776 unsigned int vlen, unsigned int flags,
777 struct compat_timespec __user *timeout)
778{
779 int datagrams;
780 struct timespec ktspec;
781
782 if (flags & MSG_CMSG_COMPAT)
783 return -EINVAL;
784
785 if (COMPAT_USE_64BIT_TIME)
786 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
787 flags | MSG_CMSG_COMPAT,
788 (struct timespec *) timeout);
789
790 if (timeout == NULL)
791 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
792 flags | MSG_CMSG_COMPAT, NULL);
793
794 if (get_compat_timespec(&ktspec, timeout))
795 return -EFAULT;
796
797 datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
798 flags | MSG_CMSG_COMPAT, &ktspec);
799 if (datagrams > 0 && put_compat_timespec(&ktspec, timeout))
800 datagrams = -EFAULT;
801
802 return datagrams;
803}
804
805asmlinkage long compat_sys_socketcall(int call, u32 __user *args)
806{
807 u32 a[AUDITSC_ARGS];
808 unsigned int len;
809 u32 a0, a1;
810 int ret;
811
812 if (call < SYS_SOCKET || call > SYS_SENDMMSG)
813 return -EINVAL;
814 len = nas[call];
815 if (len > sizeof(a))
816 return -EINVAL;
817
818 if (copy_from_user(a, args, len))
819 return -EFAULT;
820
821 ret = audit_socketcall_compat(len / sizeof(a[0]), a);
822 if (ret)
823 return ret;
824
825 a0 = a[0];
826 a1 = a[1];
827
828 switch (call) {
829 case SYS_SOCKET:
830 ret = sys_socket(a0, a1, a[2]);
831 break;
832 case SYS_BIND:
833 ret = sys_bind(a0, compat_ptr(a1), a[2]);
834 break;
835 case SYS_CONNECT:
836 ret = sys_connect(a0, compat_ptr(a1), a[2]);
837 break;
838 case SYS_LISTEN:
839 ret = sys_listen(a0, a1);
840 break;
841 case SYS_ACCEPT:
842 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0);
843 break;
844 case SYS_GETSOCKNAME:
845 ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
846 break;
847 case SYS_GETPEERNAME:
848 ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2]));
849 break;
850 case SYS_SOCKETPAIR:
851 ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3]));
852 break;
853 case SYS_SEND:
854 ret = sys_send(a0, compat_ptr(a1), a[2], a[3]);
855 break;
856 case SYS_SENDTO:
857 ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]);
858 break;
859 case SYS_RECV:
860 ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]);
861 break;
862 case SYS_RECVFROM:
863 ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3],
864 compat_ptr(a[4]), compat_ptr(a[5]));
865 break;
866 case SYS_SHUTDOWN:
867 ret = sys_shutdown(a0, a1);
868 break;
869 case SYS_SETSOCKOPT:
870 ret = compat_sys_setsockopt(a0, a1, a[2],
871 compat_ptr(a[3]), a[4]);
872 break;
873 case SYS_GETSOCKOPT:
874 ret = compat_sys_getsockopt(a0, a1, a[2],
875 compat_ptr(a[3]), compat_ptr(a[4]));
876 break;
877 case SYS_SENDMSG:
878 ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
879 break;
880 case SYS_SENDMMSG:
881 ret = compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]);
882 break;
883 case SYS_RECVMSG:
884 ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);
885 break;
886 case SYS_RECVMMSG:
887 ret = compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3],
888 compat_ptr(a[4]));
889 break;
890 case SYS_ACCEPT4:
891 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]);
892 break;
893 default:
894 ret = -EINVAL;
895 break;
896 }
897 return ret;
898}
899
