This source file includes following definitions.
- get_compat_msghdr
- cmsg_compat_nxthdr
- cmsghdr_from_user_compat_to_kern
- put_cmsg_compat
- scm_detach_fds_compat
- get_compat_bpf_fprog
- do_set_attach_filter
- compat_sock_setsockopt
- __compat_sys_setsockopt
- COMPAT_SYSCALL_DEFINE5
- __compat_sys_getsockopt
- COMPAT_SYSCALL_DEFINE5
- compat_mc_getsockopt
- __compat_sys_sendmsg
- COMPAT_SYSCALL_DEFINE3
- __compat_sys_sendmmsg
- COMPAT_SYSCALL_DEFINE4
- __compat_sys_recvmsg
- COMPAT_SYSCALL_DEFINE3
- __compat_sys_recvfrom
- COMPAT_SYSCALL_DEFINE4
- COMPAT_SYSCALL_DEFINE6
- COMPAT_SYSCALL_DEFINE5
- COMPAT_SYSCALL_DEFINE5
- COMPAT_SYSCALL_DEFINE2
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15 #include <linux/kernel.h>
16 #include <linux/gfp.h>
17 #include <linux/fs.h>
18 #include <linux/types.h>
19 #include <linux/file.h>
20 #include <linux/icmpv6.h>
21 #include <linux/socket.h>
22 #include <linux/syscalls.h>
23 #include <linux/filter.h>
24 #include <linux/compat.h>
25 #include <linux/security.h>
26 #include <linux/audit.h>
27 #include <linux/export.h>
28
29 #include <net/scm.h>
30 #include <net/sock.h>
31 #include <net/ip.h>
32 #include <net/ipv6.h>
33 #include <linux/uaccess.h>
34 #include <net/compat.h>
35
36 int get_compat_msghdr(struct msghdr *kmsg,
37 struct compat_msghdr __user *umsg,
38 struct sockaddr __user **save_addr,
39 struct iovec **iov)
40 {
41 struct compat_msghdr msg;
42 ssize_t err;
43
44 if (copy_from_user(&msg, umsg, sizeof(*umsg)))
45 return -EFAULT;
46
47 kmsg->msg_flags = msg.msg_flags;
48 kmsg->msg_namelen = msg.msg_namelen;
49
50 if (!msg.msg_name)
51 kmsg->msg_namelen = 0;
52
53 if (kmsg->msg_namelen < 0)
54 return -EINVAL;
55
56 if (kmsg->msg_namelen > sizeof(struct sockaddr_storage))
57 kmsg->msg_namelen = sizeof(struct sockaddr_storage);
58
59 kmsg->msg_control = compat_ptr(msg.msg_control);
60 kmsg->msg_controllen = msg.msg_controllen;
61
62 if (save_addr)
63 *save_addr = compat_ptr(msg.msg_name);
64
65 if (msg.msg_name && kmsg->msg_namelen) {
66 if (!save_addr) {
67 err = move_addr_to_kernel(compat_ptr(msg.msg_name),
68 kmsg->msg_namelen,
69 kmsg->msg_name);
70 if (err < 0)
71 return err;
72 }
73 } else {
74 kmsg->msg_name = NULL;
75 kmsg->msg_namelen = 0;
76 }
77
78 if (msg.msg_iovlen > UIO_MAXIOV)
79 return -EMSGSIZE;
80
81 kmsg->msg_iocb = NULL;
82
83 err = compat_import_iovec(save_addr ? READ : WRITE,
84 compat_ptr(msg.msg_iov), msg.msg_iovlen,
85 UIO_FASTIOV, iov, &kmsg->msg_iter);
86 return err < 0 ? err : 0;
87 }
88
89
90 #define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32))
91
92 #define CMSG_COMPAT_DATA(cmsg) \
93 ((void __user *)((char __user *)(cmsg) + sizeof(struct compat_cmsghdr)))
94 #define CMSG_COMPAT_SPACE(len) \
95 (sizeof(struct compat_cmsghdr) + CMSG_COMPAT_ALIGN(len))
96 #define CMSG_COMPAT_LEN(len) \
97 (sizeof(struct compat_cmsghdr) + (len))
98
99 #define CMSG_COMPAT_FIRSTHDR(msg) \
100 (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \
101 (struct compat_cmsghdr __user *)((msg)->msg_control) : \
102 (struct compat_cmsghdr __user *)NULL)
103
104 #define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \
105 ((ucmlen) >= sizeof(struct compat_cmsghdr) && \
106 (ucmlen) <= (unsigned long) \
107 ((mhdr)->msg_controllen - \
108 ((char *)(ucmsg) - (char *)(mhdr)->msg_control)))
109
110 static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg,
111 struct compat_cmsghdr __user *cmsg, int cmsg_len)
112 {
113 char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len);
114 if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) >
115 msg->msg_controllen)
116 return NULL;
117 return (struct compat_cmsghdr __user *)ptr;
118 }
119
120
121
122
123
124 int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk,
125 unsigned char *stackbuf, int stackbuf_size)
126 {
127 struct compat_cmsghdr __user *ucmsg;
128 struct cmsghdr *kcmsg, *kcmsg_base;
129 compat_size_t ucmlen;
130 __kernel_size_t kcmlen, tmp;
131 int err = -EFAULT;
132
133 BUILD_BUG_ON(sizeof(struct compat_cmsghdr) !=
134 CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)));
135
136 kcmlen = 0;
137 kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf;
138 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
139 while (ucmsg != NULL) {
140 if (get_user(ucmlen, &ucmsg->cmsg_len))
141 return -EFAULT;
142
143
144 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
145 return -EINVAL;
146
147 tmp = ((ucmlen - sizeof(*ucmsg)) + sizeof(struct cmsghdr));
148 tmp = CMSG_ALIGN(tmp);
149 kcmlen += tmp;
150 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
151 }
152 if (kcmlen == 0)
153 return -EINVAL;
154
155
156
157
158
159
160 if (kcmlen > stackbuf_size)
161 kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL);
162 if (kcmsg == NULL)
163 return -ENOBUFS;
164
165
166 memset(kcmsg, 0, kcmlen);
167 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
168 while (ucmsg != NULL) {
169 if (__get_user(ucmlen, &ucmsg->cmsg_len))
170 goto Efault;
171 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
172 goto Einval;
173 tmp = ((ucmlen - sizeof(*ucmsg)) + sizeof(struct cmsghdr));
174 if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp))
175 goto Einval;
176 kcmsg->cmsg_len = tmp;
177 tmp = CMSG_ALIGN(tmp);
178 if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) ||
179 __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) ||
180 copy_from_user(CMSG_DATA(kcmsg),
181 CMSG_COMPAT_DATA(ucmsg),
182 (ucmlen - sizeof(*ucmsg))))
183 goto Efault;
184
185
186 kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp);
187 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
188 }
189
190
191
192
193
194 if ((char *)kcmsg - (char *)kcmsg_base != kcmlen)
195 goto Einval;
196
197
198 kmsg->msg_control = kcmsg_base;
199 kmsg->msg_controllen = kcmlen;
200 return 0;
201
202 Einval:
203 err = -EINVAL;
204 Efault:
205 if (kcmsg_base != (struct cmsghdr *)stackbuf)
206 sock_kfree_s(sk, kcmsg_base, kcmlen);
207 return err;
208 }
209
210 int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data)
211 {
212 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
213 struct compat_cmsghdr cmhdr;
214 struct old_timeval32 ctv;
215 struct old_timespec32 cts[3];
216 int cmlen;
217
218 if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) {
219 kmsg->msg_flags |= MSG_CTRUNC;
220 return 0;
221 }
222
223 if (!COMPAT_USE_64BIT_TIME) {
224 if (level == SOL_SOCKET && type == SO_TIMESTAMP_OLD) {
225 struct __kernel_old_timeval *tv = (struct __kernel_old_timeval *)data;
226 ctv.tv_sec = tv->tv_sec;
227 ctv.tv_usec = tv->tv_usec;
228 data = &ctv;
229 len = sizeof(ctv);
230 }
231 if (level == SOL_SOCKET &&
232 (type == SO_TIMESTAMPNS_OLD || type == SO_TIMESTAMPING_OLD)) {
233 int count = type == SO_TIMESTAMPNS_OLD ? 1 : 3;
234 int i;
235 struct timespec *ts = (struct timespec *)data;
236 for (i = 0; i < count; i++) {
237 cts[i].tv_sec = ts[i].tv_sec;
238 cts[i].tv_nsec = ts[i].tv_nsec;
239 }
240 data = &cts;
241 len = sizeof(cts[0]) * count;
242 }
243 }
244
245 cmlen = CMSG_COMPAT_LEN(len);
246 if (kmsg->msg_controllen < cmlen) {
247 kmsg->msg_flags |= MSG_CTRUNC;
248 cmlen = kmsg->msg_controllen;
249 }
250 cmhdr.cmsg_level = level;
251 cmhdr.cmsg_type = type;
252 cmhdr.cmsg_len = cmlen;
253
254 if (copy_to_user(cm, &cmhdr, sizeof cmhdr))
255 return -EFAULT;
256 if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr)))
257 return -EFAULT;
258 cmlen = CMSG_COMPAT_SPACE(len);
259 if (kmsg->msg_controllen < cmlen)
260 cmlen = kmsg->msg_controllen;
261 kmsg->msg_control += cmlen;
262 kmsg->msg_controllen -= cmlen;
263 return 0;
264 }
265
266 void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm)
267 {
268 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
269 int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int);
270 int fdnum = scm->fp->count;
271 struct file **fp = scm->fp->fp;
272 int __user *cmfptr;
273 int err = 0, i;
274
275 if (fdnum < fdmax)
276 fdmax = fdnum;
277
278 for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) {
279 int new_fd;
280 err = security_file_receive(fp[i]);
281 if (err)
282 break;
283 err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags
284 ? O_CLOEXEC : 0);
285 if (err < 0)
286 break;
287 new_fd = err;
288 err = put_user(new_fd, cmfptr);
289 if (err) {
290 put_unused_fd(new_fd);
291 break;
292 }
293
294 fd_install(new_fd, get_file(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
315
316
317 __scm_destroy(scm);
318 }
319
320
321 struct sock_fprog __user *get_compat_bpf_fprog(char __user *optval)
322 {
323 struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval;
324 struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog));
325 struct compat_sock_fprog f32;
326 struct sock_fprog f;
327
328 if (copy_from_user(&f32, fprog32, sizeof(*fprog32)))
329 return NULL;
330 memset(&f, 0, sizeof(f));
331 f.len = f32.len;
332 f.filter = compat_ptr(f32.filter);
333 if (copy_to_user(kfprog, &f, sizeof(struct sock_fprog)))
334 return NULL;
335
336 return kfprog;
337 }
338 EXPORT_SYMBOL_GPL(get_compat_bpf_fprog);
339
340 static int do_set_attach_filter(struct socket *sock, int level, int optname,
341 char __user *optval, unsigned int optlen)
342 {
343 struct sock_fprog __user *kfprog;
344
345 kfprog = get_compat_bpf_fprog(optval);
346 if (!kfprog)
347 return -EFAULT;
348
349 return sock_setsockopt(sock, level, optname, (char __user *)kfprog,
350 sizeof(struct sock_fprog));
351 }
352
353 static int compat_sock_setsockopt(struct socket *sock, int level, int optname,
354 char __user *optval, unsigned int optlen)
355 {
356 if (optname == SO_ATTACH_FILTER ||
357 optname == SO_ATTACH_REUSEPORT_CBPF)
358 return do_set_attach_filter(sock, level, optname,
359 optval, optlen);
360 return sock_setsockopt(sock, level, optname, optval, optlen);
361 }
362
363 static int __compat_sys_setsockopt(int fd, int level, int optname,
364 char __user *optval, unsigned int optlen)
365 {
366 int err;
367 struct socket *sock;
368
369 if (optlen > INT_MAX)
370 return -EINVAL;
371
372 sock = sockfd_lookup(fd, &err);
373 if (sock) {
374 err = security_socket_setsockopt(sock, level, optname);
375 if (err) {
376 sockfd_put(sock);
377 return err;
378 }
379
380 if (level == SOL_SOCKET)
381 err = compat_sock_setsockopt(sock, level,
382 optname, optval, optlen);
383 else if (sock->ops->compat_setsockopt)
384 err = sock->ops->compat_setsockopt(sock, level,
385 optname, optval, optlen);
386 else
387 err = sock->ops->setsockopt(sock, level,
388 optname, optval, optlen);
389 sockfd_put(sock);
390 }
391 return err;
392 }
393
394 COMPAT_SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname,
395 char __user *, optval, unsigned int, optlen)
396 {
397 return __compat_sys_setsockopt(fd, level, optname, optval, optlen);
398 }
399
400 static int __compat_sys_getsockopt(int fd, int level, int optname,
401 char __user *optval,
402 int __user *optlen)
403 {
404 int err;
405 struct socket *sock = sockfd_lookup(fd, &err);
406
407 if (sock) {
408 err = security_socket_getsockopt(sock, level, optname);
409 if (err) {
410 sockfd_put(sock);
411 return err;
412 }
413
414 if (level == SOL_SOCKET)
415 err = sock_getsockopt(sock, level,
416 optname, optval, optlen);
417 else if (sock->ops->compat_getsockopt)
418 err = sock->ops->compat_getsockopt(sock, level,
419 optname, optval, optlen);
420 else
421 err = sock->ops->getsockopt(sock, level,
422 optname, optval, optlen);
423 sockfd_put(sock);
424 }
425 return err;
426 }
427
428 COMPAT_SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname,
429 char __user *, optval, int __user *, optlen)
430 {
431 return __compat_sys_getsockopt(fd, level, optname, optval, optlen);
432 }
433
434 struct compat_group_req {
435 __u32 gr_interface;
436 struct __kernel_sockaddr_storage gr_group
437 __aligned(4);
438 } __packed;
439
440 struct compat_group_source_req {
441 __u32 gsr_interface;
442 struct __kernel_sockaddr_storage gsr_group
443 __aligned(4);
444 struct __kernel_sockaddr_storage gsr_source
445 __aligned(4);
446 } __packed;
447
448 struct compat_group_filter {
449 __u32 gf_interface;
450 struct __kernel_sockaddr_storage gf_group
451 __aligned(4);
452 __u32 gf_fmode;
453 __u32 gf_numsrc;
454 struct __kernel_sockaddr_storage gf_slist[1]
455 __aligned(4);
456 } __packed;
457
458 #define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \
459 sizeof(struct __kernel_sockaddr_storage))
460
461
462 int compat_mc_setsockopt(struct sock *sock, int level, int optname,
463 char __user *optval, unsigned int optlen,
464 int (*setsockopt)(struct sock *, int, int, char __user *, unsigned int))
465 {
466 char __user *koptval = optval;
467 int koptlen = optlen;
468
469 switch (optname) {
470 case MCAST_JOIN_GROUP:
471 case MCAST_LEAVE_GROUP:
472 {
473 struct compat_group_req __user *gr32 = (void __user *)optval;
474 struct group_req __user *kgr =
475 compat_alloc_user_space(sizeof(struct group_req));
476 u32 interface;
477
478 if (!access_ok(gr32, sizeof(*gr32)) ||
479 !access_ok(kgr, sizeof(struct group_req)) ||
480 __get_user(interface, &gr32->gr_interface) ||
481 __put_user(interface, &kgr->gr_interface) ||
482 copy_in_user(&kgr->gr_group, &gr32->gr_group,
483 sizeof(kgr->gr_group)))
484 return -EFAULT;
485 koptval = (char __user *)kgr;
486 koptlen = sizeof(struct group_req);
487 break;
488 }
489 case MCAST_JOIN_SOURCE_GROUP:
490 case MCAST_LEAVE_SOURCE_GROUP:
491 case MCAST_BLOCK_SOURCE:
492 case MCAST_UNBLOCK_SOURCE:
493 {
494 struct compat_group_source_req __user *gsr32 = (void __user *)optval;
495 struct group_source_req __user *kgsr = compat_alloc_user_space(
496 sizeof(struct group_source_req));
497 u32 interface;
498
499 if (!access_ok(gsr32, sizeof(*gsr32)) ||
500 !access_ok(kgsr,
501 sizeof(struct group_source_req)) ||
502 __get_user(interface, &gsr32->gsr_interface) ||
503 __put_user(interface, &kgsr->gsr_interface) ||
504 copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group,
505 sizeof(kgsr->gsr_group)) ||
506 copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source,
507 sizeof(kgsr->gsr_source)))
508 return -EFAULT;
509 koptval = (char __user *)kgsr;
510 koptlen = sizeof(struct group_source_req);
511 break;
512 }
513 case MCAST_MSFILTER:
514 {
515 struct compat_group_filter __user *gf32 = (void __user *)optval;
516 struct group_filter __user *kgf;
517 u32 interface, fmode, numsrc;
518
519 if (!access_ok(gf32, __COMPAT_GF0_SIZE) ||
520 __get_user(interface, &gf32->gf_interface) ||
521 __get_user(fmode, &gf32->gf_fmode) ||
522 __get_user(numsrc, &gf32->gf_numsrc))
523 return -EFAULT;
524 koptlen = optlen + sizeof(struct group_filter) -
525 sizeof(struct compat_group_filter);
526 if (koptlen < GROUP_FILTER_SIZE(numsrc))
527 return -EINVAL;
528 kgf = compat_alloc_user_space(koptlen);
529 if (!access_ok(kgf, koptlen) ||
530 __put_user(interface, &kgf->gf_interface) ||
531 __put_user(fmode, &kgf->gf_fmode) ||
532 __put_user(numsrc, &kgf->gf_numsrc) ||
533 copy_in_user(&kgf->gf_group, &gf32->gf_group,
534 sizeof(kgf->gf_group)) ||
535 (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist,
536 numsrc * sizeof(kgf->gf_slist[0]))))
537 return -EFAULT;
538 koptval = (char __user *)kgf;
539 break;
540 }
541
542 default:
543 break;
544 }
545 return setsockopt(sock, level, optname, koptval, koptlen);
546 }
547 EXPORT_SYMBOL(compat_mc_setsockopt);
548
549 int compat_mc_getsockopt(struct sock *sock, int level, int optname,
550 char __user *optval, int __user *optlen,
551 int (*getsockopt)(struct sock *, int, int, char __user *, int __user *))
552 {
553 struct compat_group_filter __user *gf32 = (void __user *)optval;
554 struct group_filter __user *kgf;
555 int __user *koptlen;
556 u32 interface, fmode, numsrc;
557 int klen, ulen, err;
558
559 if (optname != MCAST_MSFILTER)
560 return getsockopt(sock, level, optname, optval, optlen);
561
562 koptlen = compat_alloc_user_space(sizeof(*koptlen));
563 if (!access_ok(optlen, sizeof(*optlen)) ||
564 __get_user(ulen, optlen))
565 return -EFAULT;
566
567
568 klen = ulen + sizeof(*kgf) - sizeof(*gf32);
569
570 if (klen < GROUP_FILTER_SIZE(0))
571 return -EINVAL;
572
573 if (!access_ok(koptlen, sizeof(*koptlen)) ||
574 __put_user(klen, koptlen))
575 return -EFAULT;
576
577
578 kgf = compat_alloc_user_space(klen+sizeof(*optlen));
579
580 if (!access_ok(gf32, __COMPAT_GF0_SIZE) ||
581 __get_user(interface, &gf32->gf_interface) ||
582 __get_user(fmode, &gf32->gf_fmode) ||
583 __get_user(numsrc, &gf32->gf_numsrc) ||
584 __put_user(interface, &kgf->gf_interface) ||
585 __put_user(fmode, &kgf->gf_fmode) ||
586 __put_user(numsrc, &kgf->gf_numsrc) ||
587 copy_in_user(&kgf->gf_group, &gf32->gf_group, sizeof(kgf->gf_group)))
588 return -EFAULT;
589
590 err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen);
591 if (err)
592 return err;
593
594 if (!access_ok(koptlen, sizeof(*koptlen)) ||
595 __get_user(klen, koptlen))
596 return -EFAULT;
597
598 ulen = klen - (sizeof(*kgf)-sizeof(*gf32));
599
600 if (!access_ok(optlen, sizeof(*optlen)) ||
601 __put_user(ulen, optlen))
602 return -EFAULT;
603
604 if (!access_ok(kgf, klen) ||
605 !access_ok(gf32, ulen) ||
606 __get_user(interface, &kgf->gf_interface) ||
607 __get_user(fmode, &kgf->gf_fmode) ||
608 __get_user(numsrc, &kgf->gf_numsrc) ||
609 __put_user(interface, &gf32->gf_interface) ||
610 __put_user(fmode, &gf32->gf_fmode) ||
611 __put_user(numsrc, &gf32->gf_numsrc))
612 return -EFAULT;
613 if (numsrc) {
614 int copylen;
615
616 klen -= GROUP_FILTER_SIZE(0);
617 copylen = numsrc * sizeof(gf32->gf_slist[0]);
618 if (copylen > klen)
619 copylen = klen;
620 if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen))
621 return -EFAULT;
622 }
623 return err;
624 }
625 EXPORT_SYMBOL(compat_mc_getsockopt);
626
627
628
629 #define AL(x) ((x) * sizeof(u32))
630 static unsigned char nas[21] = {
631 AL(0), AL(3), AL(3), AL(3), AL(2), AL(3),
632 AL(3), AL(3), AL(4), AL(4), AL(4), AL(6),
633 AL(6), AL(2), AL(5), AL(5), AL(3), AL(3),
634 AL(4), AL(5), AL(4)
635 };
636 #undef AL
637
638 static inline long __compat_sys_sendmsg(int fd,
639 struct compat_msghdr __user *msg,
640 unsigned int flags)
641 {
642 return __sys_sendmsg(fd, (struct user_msghdr __user *)msg,
643 flags | MSG_CMSG_COMPAT, false);
644 }
645
646 COMPAT_SYSCALL_DEFINE3(sendmsg, int, fd, struct compat_msghdr __user *, msg,
647 unsigned int, flags)
648 {
649 return __compat_sys_sendmsg(fd, msg, flags);
650 }
651
652 static inline long __compat_sys_sendmmsg(int fd,
653 struct compat_mmsghdr __user *mmsg,
654 unsigned int vlen, unsigned int flags)
655 {
656 return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
657 flags | MSG_CMSG_COMPAT, false);
658 }
659
660 COMPAT_SYSCALL_DEFINE4(sendmmsg, int, fd, struct compat_mmsghdr __user *, mmsg,
661 unsigned int, vlen, unsigned int, flags)
662 {
663 return __compat_sys_sendmmsg(fd, mmsg, vlen, flags);
664 }
665
666 static inline long __compat_sys_recvmsg(int fd,
667 struct compat_msghdr __user *msg,
668 unsigned int flags)
669 {
670 return __sys_recvmsg(fd, (struct user_msghdr __user *)msg,
671 flags | MSG_CMSG_COMPAT, false);
672 }
673
674 COMPAT_SYSCALL_DEFINE3(recvmsg, int, fd, struct compat_msghdr __user *, msg,
675 unsigned int, flags)
676 {
677 return __compat_sys_recvmsg(fd, msg, flags);
678 }
679
680 static inline long __compat_sys_recvfrom(int fd, void __user *buf,
681 compat_size_t len, unsigned int flags,
682 struct sockaddr __user *addr,
683 int __user *addrlen)
684 {
685 return __sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr,
686 addrlen);
687 }
688
689 COMPAT_SYSCALL_DEFINE4(recv, int, fd, void __user *, buf, compat_size_t, len, unsigned int, flags)
690 {
691 return __compat_sys_recvfrom(fd, buf, len, flags, NULL, NULL);
692 }
693
694 COMPAT_SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, buf, compat_size_t, len,
695 unsigned int, flags, struct sockaddr __user *, addr,
696 int __user *, addrlen)
697 {
698 return __compat_sys_recvfrom(fd, buf, len, flags, addr, addrlen);
699 }
700
701 COMPAT_SYSCALL_DEFINE5(recvmmsg_time64, int, fd, struct compat_mmsghdr __user *, mmsg,
702 unsigned int, vlen, unsigned int, flags,
703 struct __kernel_timespec __user *, timeout)
704 {
705 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
706 flags | MSG_CMSG_COMPAT, timeout, NULL);
707 }
708
709 #ifdef CONFIG_COMPAT_32BIT_TIME
710 COMPAT_SYSCALL_DEFINE5(recvmmsg_time32, int, fd, struct compat_mmsghdr __user *, mmsg,
711 unsigned int, vlen, unsigned int, flags,
712 struct old_timespec32 __user *, timeout)
713 {
714 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
715 flags | MSG_CMSG_COMPAT, NULL, timeout);
716 }
717 #endif
718
719 COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user *, args)
720 {
721 u32 a[AUDITSC_ARGS];
722 unsigned int len;
723 u32 a0, a1;
724 int ret;
725
726 if (call < SYS_SOCKET || call > SYS_SENDMMSG)
727 return -EINVAL;
728 len = nas[call];
729 if (len > sizeof(a))
730 return -EINVAL;
731
732 if (copy_from_user(a, args, len))
733 return -EFAULT;
734
735 ret = audit_socketcall_compat(len / sizeof(a[0]), a);
736 if (ret)
737 return ret;
738
739 a0 = a[0];
740 a1 = a[1];
741
742 switch (call) {
743 case SYS_SOCKET:
744 ret = __sys_socket(a0, a1, a[2]);
745 break;
746 case SYS_BIND:
747 ret = __sys_bind(a0, compat_ptr(a1), a[2]);
748 break;
749 case SYS_CONNECT:
750 ret = __sys_connect(a0, compat_ptr(a1), a[2]);
751 break;
752 case SYS_LISTEN:
753 ret = __sys_listen(a0, a1);
754 break;
755 case SYS_ACCEPT:
756 ret = __sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0);
757 break;
758 case SYS_GETSOCKNAME:
759 ret = __sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
760 break;
761 case SYS_GETPEERNAME:
762 ret = __sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2]));
763 break;
764 case SYS_SOCKETPAIR:
765 ret = __sys_socketpair(a0, a1, a[2], compat_ptr(a[3]));
766 break;
767 case SYS_SEND:
768 ret = __sys_sendto(a0, compat_ptr(a1), a[2], a[3], NULL, 0);
769 break;
770 case SYS_SENDTO:
771 ret = __sys_sendto(a0, compat_ptr(a1), a[2], a[3],
772 compat_ptr(a[4]), a[5]);
773 break;
774 case SYS_RECV:
775 ret = __compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3],
776 NULL, NULL);
777 break;
778 case SYS_RECVFROM:
779 ret = __compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3],
780 compat_ptr(a[4]),
781 compat_ptr(a[5]));
782 break;
783 case SYS_SHUTDOWN:
784 ret = __sys_shutdown(a0, a1);
785 break;
786 case SYS_SETSOCKOPT:
787 ret = __compat_sys_setsockopt(a0, a1, a[2],
788 compat_ptr(a[3]), a[4]);
789 break;
790 case SYS_GETSOCKOPT:
791 ret = __compat_sys_getsockopt(a0, a1, a[2],
792 compat_ptr(a[3]),
793 compat_ptr(a[4]));
794 break;
795 case SYS_SENDMSG:
796 ret = __compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
797 break;
798 case SYS_SENDMMSG:
799 ret = __compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]);
800 break;
801 case SYS_RECVMSG:
802 ret = __compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);
803 break;
804 case SYS_RECVMMSG:
805 ret = __sys_recvmmsg(a0, compat_ptr(a1), a[2],
806 a[3] | MSG_CMSG_COMPAT, NULL,
807 compat_ptr(a[4]));
808 break;
809 case SYS_ACCEPT4:
810 ret = __sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]);
811 break;
812 default:
813 ret = -EINVAL;
814 break;
815 }
816 return ret;
817 }