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Linux 4.9.121
[linux/fpc-iii.git] / net / compat.c
blob73671e6ec6ebb4e9b6315375257759da2be49e10
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 <asm/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) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr))))
95 #define CMSG_COMPAT_SPACE(len) \
96 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len))
97 #define CMSG_COMPAT_LEN(len) \
98 (CMSG_COMPAT_ALIGN(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 kcmlen = 0;
135 kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf;
136 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
137 while (ucmsg != NULL) {
138 if (get_user(ucmlen, &ucmsg->cmsg_len))
139 return -EFAULT;
140
141 /* Catch bogons. */
142 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
143 return -EINVAL;
144
145 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
146 CMSG_ALIGN(sizeof(struct cmsghdr)));
147 tmp = CMSG_ALIGN(tmp);
148 kcmlen += tmp;
149 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
150 }
151 if (kcmlen == 0)
152 return -EINVAL;
153
154 /* The kcmlen holds the 64-bit version of the control length.
155 * It may not be modified as we do not stick it into the kmsg
156 * until we have successfully copied over all of the data
157 * from the user.
158 */
159 if (kcmlen > stackbuf_size)
160 kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL);
161 if (kcmsg == NULL)
162 return -ENOBUFS;
163
164 /* Now copy them over neatly. */
165 memset(kcmsg, 0, kcmlen);
166 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
167 while (ucmsg != NULL) {
168 if (__get_user(ucmlen, &ucmsg->cmsg_len))
169 goto Efault;
170 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
171 goto Einval;
172 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
173 CMSG_ALIGN(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 - CMSG_COMPAT_ALIGN(sizeof(*ucmsg)))))
183 goto Efault;
184
185 /* Advance. */
186 kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp);
187 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
188 }
189
190 /* Ok, looks like we made it. Hook it up and return success. */
191 kmsg->msg_control = kcmsg_base;
192 kmsg->msg_controllen = kcmlen;
193 return 0;
194
195 Einval:
196 err = -EINVAL;
197 Efault:
198 if (kcmsg_base != (struct cmsghdr *)stackbuf)
199 sock_kfree_s(sk, kcmsg_base, kcmlen);
200 return err;
201 }
202
203 int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data)
204 {
205 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
206 struct compat_cmsghdr cmhdr;
207 struct compat_timeval ctv;
208 struct compat_timespec cts[3];
209 int cmlen;
210
211 if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) {
212 kmsg->msg_flags |= MSG_CTRUNC;
213 return 0; /* XXX: return error? check spec. */
214 }
215
216 if (!COMPAT_USE_64BIT_TIME) {
217 if (level == SOL_SOCKET && type == SCM_TIMESTAMP) {
218 struct timeval *tv = (struct timeval *)data;
219 ctv.tv_sec = tv->tv_sec;
220 ctv.tv_usec = tv->tv_usec;
221 data = &ctv;
222 len = sizeof(ctv);
223 }
224 if (level == SOL_SOCKET &&
225 (type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) {
226 int count = type == SCM_TIMESTAMPNS ? 1 : 3;
227 int i;
228 struct timespec *ts = (struct timespec *)data;
229 for (i = 0; i < count; i++) {
230 cts[i].tv_sec = ts[i].tv_sec;
231 cts[i].tv_nsec = ts[i].tv_nsec;
232 }
233 data = &cts;
234 len = sizeof(cts[0]) * count;
235 }
236 }
237
238 cmlen = CMSG_COMPAT_LEN(len);
239 if (kmsg->msg_controllen < cmlen) {
240 kmsg->msg_flags |= MSG_CTRUNC;
241 cmlen = kmsg->msg_controllen;
242 }
243 cmhdr.cmsg_level = level;
244 cmhdr.cmsg_type = type;
245 cmhdr.cmsg_len = cmlen;
246
247 if (copy_to_user(cm, &cmhdr, sizeof cmhdr))
248 return -EFAULT;
249 if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr)))
250 return -EFAULT;
251 cmlen = CMSG_COMPAT_SPACE(len);
252 if (kmsg->msg_controllen < cmlen)
253 cmlen = kmsg->msg_controllen;
254 kmsg->msg_control += cmlen;
255 kmsg->msg_controllen -= cmlen;
256 return 0;
257 }
258
259 void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm)
260 {
261 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
262 int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int);
263 int fdnum = scm->fp->count;
264 struct file **fp = scm->fp->fp;
265 int __user *cmfptr;
266 int err = 0, i;
267
268 if (fdnum < fdmax)
269 fdmax = fdnum;
270
271 for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) {
272 int new_fd;
273 err = security_file_receive(fp[i]);
274 if (err)
275 break;
276 err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags
277 ? O_CLOEXEC : 0);
278 if (err < 0)
279 break;
280 new_fd = err;
281 err = put_user(new_fd, cmfptr);
282 if (err) {
283 put_unused_fd(new_fd);
284 break;
285 }
286 /* Bump the usage count and install the file. */
287 fd_install(new_fd, get_file(fp[i]));
288 }
289
290 if (i > 0) {
291 int cmlen = CMSG_COMPAT_LEN(i * sizeof(int));
292 err = put_user(SOL_SOCKET, &cm->cmsg_level);
293 if (!err)
294 err = put_user(SCM_RIGHTS, &cm->cmsg_type);
295 if (!err)
296 err = put_user(cmlen, &cm->cmsg_len);
297 if (!err) {
298 cmlen = CMSG_COMPAT_SPACE(i * sizeof(int));
299 kmsg->msg_control += cmlen;
300 kmsg->msg_controllen -= cmlen;
301 }
302 }
303 if (i < fdnum)
304 kmsg->msg_flags |= MSG_CTRUNC;
305
306 /*
307 * All of the files that fit in the message have had their
308 * usage counts incremented, so we just free the list.
309 */
310 __scm_destroy(scm);
311 }
312
313 /* allocate a 64-bit sock_fprog on the user stack for duration of syscall. */
314 struct sock_fprog __user *get_compat_bpf_fprog(char __user *optval)
315 {
316 struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval;
317 struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog));
318 compat_uptr_t ptr;
319 u16 len;
320
321 if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) ||
322 !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) ||
323 __get_user(len, &fprog32->len) ||
324 __get_user(ptr, &fprog32->filter) ||
325 __put_user(len, &kfprog->len) ||
326 __put_user(compat_ptr(ptr), &kfprog->filter))
327 return NULL;
328
329 return kfprog;
330 }
331 EXPORT_SYMBOL_GPL(get_compat_bpf_fprog);
332
333 static int do_set_attach_filter(struct socket *sock, int level, int optname,
334 char __user *optval, unsigned int optlen)
335 {
336 struct sock_fprog __user *kfprog;
337
338 kfprog = get_compat_bpf_fprog(optval);
339 if (!kfprog)
340 return -EFAULT;
341
342 return sock_setsockopt(sock, level, optname, (char __user *)kfprog,
343 sizeof(struct sock_fprog));
344 }
345
346 static int do_set_sock_timeout(struct socket *sock, int level,
347 int optname, char __user *optval, unsigned int optlen)
348 {
349 struct compat_timeval __user *up = (struct compat_timeval __user *)optval;
350 struct timeval ktime;
351 mm_segment_t old_fs;
352 int err;
353
354 if (optlen < sizeof(*up))
355 return -EINVAL;
356 if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
357 __get_user(ktime.tv_sec, &up->tv_sec) ||
358 __get_user(ktime.tv_usec, &up->tv_usec))
359 return -EFAULT;
360 old_fs = get_fs();
361 set_fs(KERNEL_DS);
362 err = sock_setsockopt(sock, level, optname, (char *)&ktime, sizeof(ktime));
363 set_fs(old_fs);
364
365 return err;
366 }
367
368 static int compat_sock_setsockopt(struct socket *sock, int level, int optname,
369 char __user *optval, unsigned int optlen)
370 {
371 if (optname == SO_ATTACH_FILTER ||
372 optname == SO_ATTACH_REUSEPORT_CBPF)
373 return do_set_attach_filter(sock, level, optname,
374 optval, optlen);
375 if (!COMPAT_USE_64BIT_TIME &&
376 (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 (!COMPAT_USE_64BIT_TIME &&
442 (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO))
443 return do_get_sock_timeout(sock, level, optname, optval, optlen);
444 return sock_getsockopt(sock, level, optname, optval, optlen);
445 }
446
447 int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp)
448 {
449 struct compat_timeval __user *ctv;
450 int err;
451 struct timeval tv;
452
453 if (COMPAT_USE_64BIT_TIME)
454 return sock_get_timestamp(sk, userstamp);
455
456 ctv = (struct compat_timeval __user *) userstamp;
457 err = -ENOENT;
458 if (!sock_flag(sk, SOCK_TIMESTAMP))
459 sock_enable_timestamp(sk, SOCK_TIMESTAMP);
460 tv = ktime_to_timeval(sk->sk_stamp);
461 if (tv.tv_sec == -1)
462 return err;
463 if (tv.tv_sec == 0) {
464 sk->sk_stamp = ktime_get_real();
465 tv = ktime_to_timeval(sk->sk_stamp);
466 }
467 err = 0;
468 if (put_user(tv.tv_sec, &ctv->tv_sec) ||
469 put_user(tv.tv_usec, &ctv->tv_usec))
470 err = -EFAULT;
471 return err;
472 }
473 EXPORT_SYMBOL(compat_sock_get_timestamp);
474
475 int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp)
476 {
477 struct compat_timespec __user *ctv;
478 int err;
479 struct timespec ts;
480
481 if (COMPAT_USE_64BIT_TIME)
482 return sock_get_timestampns (sk, userstamp);
483
484 ctv = (struct compat_timespec __user *) userstamp;
485 err = -ENOENT;
486 if (!sock_flag(sk, SOCK_TIMESTAMP))
487 sock_enable_timestamp(sk, SOCK_TIMESTAMP);
488 ts = ktime_to_timespec(sk->sk_stamp);
489 if (ts.tv_sec == -1)
490 return err;
491 if (ts.tv_sec == 0) {
492 sk->sk_stamp = ktime_get_real();
493 ts = ktime_to_timespec(sk->sk_stamp);
494 }
495 err = 0;
496 if (put_user(ts.tv_sec, &ctv->tv_sec) ||
497 put_user(ts.tv_nsec, &ctv->tv_nsec))
498 err = -EFAULT;
499 return err;
500 }
501 EXPORT_SYMBOL(compat_sock_get_timestampns);
502
503 COMPAT_SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname,
504 char __user *, optval, int __user *, optlen)
505 {
506 int err;
507 struct socket *sock = sockfd_lookup(fd, &err);
508
509 if (sock) {
510 err = security_socket_getsockopt(sock, level, optname);
511 if (err) {
512 sockfd_put(sock);
513 return err;
514 }
515
516 if (level == SOL_SOCKET)
517 err = compat_sock_getsockopt(sock, level,
518 optname, optval, optlen);
519 else if (sock->ops->compat_getsockopt)
520 err = sock->ops->compat_getsockopt(sock, level,
521 optname, optval, optlen);
522 else
523 err = sock->ops->getsockopt(sock, level,
524 optname, optval, optlen);
525 sockfd_put(sock);
526 }
527 return err;
528 }
529
530 struct compat_group_req {
531 __u32 gr_interface;
532 struct __kernel_sockaddr_storage gr_group
533 __aligned(4);
534 } __packed;
535
536 struct compat_group_source_req {
537 __u32 gsr_interface;
538 struct __kernel_sockaddr_storage gsr_group
539 __aligned(4);
540 struct __kernel_sockaddr_storage gsr_source
541 __aligned(4);
542 } __packed;
543
544 struct compat_group_filter {
545 __u32 gf_interface;
546 struct __kernel_sockaddr_storage gf_group
547 __aligned(4);
548 __u32 gf_fmode;
549 __u32 gf_numsrc;
550 struct __kernel_sockaddr_storage gf_slist[1]
551 __aligned(4);
552 } __packed;
553
554 #define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \
555 sizeof(struct __kernel_sockaddr_storage))
556
557
558 int compat_mc_setsockopt(struct sock *sock, int level, int optname,
559 char __user *optval, unsigned int optlen,
560 int (*setsockopt)(struct sock *, int, int, char __user *, unsigned int))
561 {
562 char __user *koptval = optval;
563 int koptlen = optlen;
564
565 switch (optname) {
566 case MCAST_JOIN_GROUP:
567 case MCAST_LEAVE_GROUP:
568 {
569 struct compat_group_req __user *gr32 = (void *)optval;
570 struct group_req __user *kgr =
571 compat_alloc_user_space(sizeof(struct group_req));
572 u32 interface;
573
574 if (!access_ok(VERIFY_READ, gr32, sizeof(*gr32)) ||
575 !access_ok(VERIFY_WRITE, kgr, sizeof(struct group_req)) ||
576 __get_user(interface, &gr32->gr_interface) ||
577 __put_user(interface, &kgr->gr_interface) ||
578 copy_in_user(&kgr->gr_group, &gr32->gr_group,
579 sizeof(kgr->gr_group)))
580 return -EFAULT;
581 koptval = (char __user *)kgr;
582 koptlen = sizeof(struct group_req);
583 break;
584 }
585 case MCAST_JOIN_SOURCE_GROUP:
586 case MCAST_LEAVE_SOURCE_GROUP:
587 case MCAST_BLOCK_SOURCE:
588 case MCAST_UNBLOCK_SOURCE:
589 {
590 struct compat_group_source_req __user *gsr32 = (void *)optval;
591 struct group_source_req __user *kgsr = compat_alloc_user_space(
592 sizeof(struct group_source_req));
593 u32 interface;
594
595 if (!access_ok(VERIFY_READ, gsr32, sizeof(*gsr32)) ||
596 !access_ok(VERIFY_WRITE, kgsr,
597 sizeof(struct group_source_req)) ||
598 __get_user(interface, &gsr32->gsr_interface) ||
599 __put_user(interface, &kgsr->gsr_interface) ||
600 copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group,
601 sizeof(kgsr->gsr_group)) ||
602 copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source,
603 sizeof(kgsr->gsr_source)))
604 return -EFAULT;
605 koptval = (char __user *)kgsr;
606 koptlen = sizeof(struct group_source_req);
607 break;
608 }
609 case MCAST_MSFILTER:
610 {
611 struct compat_group_filter __user *gf32 = (void *)optval;
612 struct group_filter __user *kgf;
613 u32 interface, fmode, numsrc;
614
615 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) ||
616 __get_user(interface, &gf32->gf_interface) ||
617 __get_user(fmode, &gf32->gf_fmode) ||
618 __get_user(numsrc, &gf32->gf_numsrc))
619 return -EFAULT;
620 koptlen = optlen + sizeof(struct group_filter) -
621 sizeof(struct compat_group_filter);
622 if (koptlen < GROUP_FILTER_SIZE(numsrc))
623 return -EINVAL;
624 kgf = compat_alloc_user_space(koptlen);
625 if (!access_ok(VERIFY_WRITE, kgf, koptlen) ||
626 __put_user(interface, &kgf->gf_interface) ||
627 __put_user(fmode, &kgf->gf_fmode) ||
628 __put_user(numsrc, &kgf->gf_numsrc) ||
629 copy_in_user(&kgf->gf_group, &gf32->gf_group,
630 sizeof(kgf->gf_group)) ||
631 (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist,
632 numsrc * sizeof(kgf->gf_slist[0]))))
633 return -EFAULT;
634 koptval = (char __user *)kgf;
635 break;
636 }
637
638 default:
639 break;
640 }
641 return setsockopt(sock, level, optname, koptval, koptlen);
642 }
643 EXPORT_SYMBOL(compat_mc_setsockopt);
644
645 int compat_mc_getsockopt(struct sock *sock, int level, int optname,
646 char __user *optval, int __user *optlen,
647 int (*getsockopt)(struct sock *, int, int, char __user *, int __user *))
648 {
649 struct compat_group_filter __user *gf32 = (void *)optval;
650 struct group_filter __user *kgf;
651 int __user *koptlen;
652 u32 interface, fmode, numsrc;
653 int klen, ulen, err;
654
655 if (optname != MCAST_MSFILTER)
656 return getsockopt(sock, level, optname, optval, optlen);
657
658 koptlen = compat_alloc_user_space(sizeof(*koptlen));
659 if (!access_ok(VERIFY_READ, optlen, sizeof(*optlen)) ||
660 __get_user(ulen, optlen))
661 return -EFAULT;
662
663 /* adjust len for pad */
664 klen = ulen + sizeof(*kgf) - sizeof(*gf32);
665
666 if (klen < GROUP_FILTER_SIZE(0))
667 return -EINVAL;
668
669 if (!access_ok(VERIFY_WRITE, koptlen, sizeof(*koptlen)) ||
670 __put_user(klen, koptlen))
671 return -EFAULT;
672
673 /* have to allow space for previous compat_alloc_user_space, too */
674 kgf = compat_alloc_user_space(klen+sizeof(*optlen));
675
676 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) ||
677 __get_user(interface, &gf32->gf_interface) ||
678 __get_user(fmode, &gf32->gf_fmode) ||
679 __get_user(numsrc, &gf32->gf_numsrc) ||
680 __put_user(interface, &kgf->gf_interface) ||
681 __put_user(fmode, &kgf->gf_fmode) ||
682 __put_user(numsrc, &kgf->gf_numsrc) ||
683 copy_in_user(&kgf->gf_group, &gf32->gf_group, sizeof(kgf->gf_group)))
684 return -EFAULT;
685
686 err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen);
687 if (err)
688 return err;
689
690 if (!access_ok(VERIFY_READ, koptlen, sizeof(*koptlen)) ||
691 __get_user(klen, koptlen))
692 return -EFAULT;
693
694 ulen = klen - (sizeof(*kgf)-sizeof(*gf32));
695
696 if (!access_ok(VERIFY_WRITE, optlen, sizeof(*optlen)) ||
697 __put_user(ulen, optlen))
698 return -EFAULT;
699
700 if (!access_ok(VERIFY_READ, kgf, klen) ||
701 !access_ok(VERIFY_WRITE, gf32, ulen) ||
702 __get_user(interface, &kgf->gf_interface) ||
703 __get_user(fmode, &kgf->gf_fmode) ||
704 __get_user(numsrc, &kgf->gf_numsrc) ||
705 __put_user(interface, &gf32->gf_interface) ||
706 __put_user(fmode, &gf32->gf_fmode) ||
707 __put_user(numsrc, &gf32->gf_numsrc))
708 return -EFAULT;
709 if (numsrc) {
710 int copylen;
711
712 klen -= GROUP_FILTER_SIZE(0);
713 copylen = numsrc * sizeof(gf32->gf_slist[0]);
714 if (copylen > klen)
715 copylen = klen;
716 if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen))
717 return -EFAULT;
718 }
719 return err;
720 }
721 EXPORT_SYMBOL(compat_mc_getsockopt);
722
723
724 /* Argument list sizes for compat_sys_socketcall */
725 #define AL(x) ((x) * sizeof(u32))
726 static unsigned char nas[21] = {
727 AL(0), AL(3), AL(3), AL(3), AL(2), AL(3),
728 AL(3), AL(3), AL(4), AL(4), AL(4), AL(6),
729 AL(6), AL(2), AL(5), AL(5), AL(3), AL(3),
730 AL(4), AL(5), AL(4)
731 };
732 #undef AL
733
734 COMPAT_SYSCALL_DEFINE3(sendmsg, int, fd, struct compat_msghdr __user *, msg, unsigned int, flags)
735 {
736 return __sys_sendmsg(fd, (struct user_msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
737 }
738
739 COMPAT_SYSCALL_DEFINE4(sendmmsg, int, fd, struct compat_mmsghdr __user *, mmsg,
740 unsigned int, vlen, unsigned int, flags)
741 {
742 return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
743 flags | MSG_CMSG_COMPAT);
744 }
745
746 COMPAT_SYSCALL_DEFINE3(recvmsg, int, fd, struct compat_msghdr __user *, msg, unsigned int, flags)
747 {
748 return __sys_recvmsg(fd, (struct user_msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
749 }
750
751 COMPAT_SYSCALL_DEFINE4(recv, int, fd, void __user *, buf, compat_size_t, len, unsigned int, flags)
752 {
753 return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT);
754 }
755
756 COMPAT_SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, buf, compat_size_t, len,
757 unsigned int, flags, struct sockaddr __user *, addr,
758 int __user *, addrlen)
759 {
760 return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen);
761 }
762
763 COMPAT_SYSCALL_DEFINE5(recvmmsg, int, fd, struct compat_mmsghdr __user *, mmsg,
764 unsigned int, vlen, unsigned int, flags,
765 struct compat_timespec __user *, timeout)
766 {
767 int datagrams;
768 struct timespec ktspec;
769
770 if (timeout == NULL)
771 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
772 flags | MSG_CMSG_COMPAT, NULL);
773
774 if (compat_get_timespec(&ktspec, timeout))
775 return -EFAULT;
776
777 datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
778 flags | MSG_CMSG_COMPAT, &ktspec);
779 if (datagrams > 0 && compat_put_timespec(&ktspec, timeout))
780 datagrams = -EFAULT;
781
782 return datagrams;
783 }
784
785 COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user *, args)
786 {
787 u32 a[AUDITSC_ARGS];
788 unsigned int len;
789 u32 a0, a1;
790 int ret;
791
792 if (call < SYS_SOCKET || call > SYS_SENDMMSG)
793 return -EINVAL;
794 len = nas[call];
795 if (len > sizeof(a))
796 return -EINVAL;
797
798 if (copy_from_user(a, args, len))
799 return -EFAULT;
800
801 ret = audit_socketcall_compat(len / sizeof(a[0]), a);
802 if (ret)
803 return ret;
804
805 a0 = a[0];
806 a1 = a[1];
807
808 switch (call) {
809 case SYS_SOCKET:
810 ret = sys_socket(a0, a1, a[2]);
811 break;
812 case SYS_BIND:
813 ret = sys_bind(a0, compat_ptr(a1), a[2]);
814 break;
815 case SYS_CONNECT:
816 ret = sys_connect(a0, compat_ptr(a1), a[2]);
817 break;
818 case SYS_LISTEN:
819 ret = sys_listen(a0, a1);
820 break;
821 case SYS_ACCEPT:
822 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0);
823 break;
824 case SYS_GETSOCKNAME:
825 ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
826 break;
827 case SYS_GETPEERNAME:
828 ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2]));
829 break;
830 case SYS_SOCKETPAIR:
831 ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3]));
832 break;
833 case SYS_SEND:
834 ret = sys_send(a0, compat_ptr(a1), a[2], a[3]);
835 break;
836 case SYS_SENDTO:
837 ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]);
838 break;
839 case SYS_RECV:
840 ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]);
841 break;
842 case SYS_RECVFROM:
843 ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3],
844 compat_ptr(a[4]), compat_ptr(a[5]));
845 break;
846 case SYS_SHUTDOWN:
847 ret = sys_shutdown(a0, a1);
848 break;
849 case SYS_SETSOCKOPT:
850 ret = compat_sys_setsockopt(a0, a1, a[2],
851 compat_ptr(a[3]), a[4]);
852 break;
853 case SYS_GETSOCKOPT:
854 ret = compat_sys_getsockopt(a0, a1, a[2],
855 compat_ptr(a[3]), compat_ptr(a[4]));
856 break;
857 case SYS_SENDMSG:
858 ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
859 break;
860 case SYS_SENDMMSG:
861 ret = compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]);
862 break;
863 case SYS_RECVMSG:
864 ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);
865 break;
866 case SYS_RECVMMSG:
867 ret = compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3],
868 compat_ptr(a[4]));
869 break;
870 case SYS_ACCEPT4:
871 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]);
872 break;
873 default:
874 ret = -EINVAL;
875 break;
876 }
877 return ret;
878 }
Linux with added FPC-III support