summaryrefslogtreecommitdiff
path: root/net/compat.c (plain)
blob: 633fcf6ee36975f78d30015df7da349d546c53bf
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
35int 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
111static 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 */
125int 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
195Einval:
196 err = -EINVAL;
197Efault:
198 if (kcmsg_base != (struct cmsghdr *)stackbuf)
199 sock_kfree_s(sk, kcmsg_base, kcmlen);
200 return err;
201}
202
203int 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
259void 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. */
314struct 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}
331EXPORT_SYMBOL_GPL(get_compat_bpf_fprog);
332
333static 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
346static 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
368static 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
382COMPAT_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
409static 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
438static 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
447int 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(sock_read_timestamp(sk));
461
462 if (tv.tv_sec == -1)
463 return err;
464 if (tv.tv_sec == 0) {
465 ktime_t kt = ktime_get_real();
466 sock_write_timestamp(sk, kt);
467 tv = ktime_to_timeval(kt);
468 }
469 err = 0;
470 if (put_user(tv.tv_sec, &ctv->tv_sec) ||
471 put_user(tv.tv_usec, &ctv->tv_usec))
472 err = -EFAULT;
473 return err;
474}
475EXPORT_SYMBOL(compat_sock_get_timestamp);
476
477int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp)
478{
479 struct compat_timespec __user *ctv;
480 int err;
481 struct timespec ts;
482
483 if (COMPAT_USE_64BIT_TIME)
484 return sock_get_timestampns (sk, userstamp);
485
486 ctv = (struct compat_timespec __user *) userstamp;
487 err = -ENOENT;
488 if (!sock_flag(sk, SOCK_TIMESTAMP))
489 sock_enable_timestamp(sk, SOCK_TIMESTAMP);
490 ts = ktime_to_timespec(sock_read_timestamp(sk));
491 if (ts.tv_sec == -1)
492 return err;
493 if (ts.tv_sec == 0) {
494 ktime_t kt = ktime_get_real();
495 sock_write_timestamp(sk, kt);
496 ts = ktime_to_timespec(kt);
497 }
498 err = 0;
499 if (put_user(ts.tv_sec, &ctv->tv_sec) ||
500 put_user(ts.tv_nsec, &ctv->tv_nsec))
501 err = -EFAULT;
502 return err;
503}
504EXPORT_SYMBOL(compat_sock_get_timestampns);
505
506COMPAT_SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname,
507 char __user *, optval, int __user *, optlen)
508{
509 int err;
510 struct socket *sock = sockfd_lookup(fd, &err);
511
512 if (sock) {
513 err = security_socket_getsockopt(sock, level, optname);
514 if (err) {
515 sockfd_put(sock);
516 return err;
517 }
518
519 if (level == SOL_SOCKET)
520 err = compat_sock_getsockopt(sock, level,
521 optname, optval, optlen);
522 else if (sock->ops->compat_getsockopt)
523 err = sock->ops->compat_getsockopt(sock, level,
524 optname, optval, optlen);
525 else
526 err = sock->ops->getsockopt(sock, level,
527 optname, optval, optlen);
528 sockfd_put(sock);
529 }
530 return err;
531}
532
533struct compat_group_req {
534 __u32 gr_interface;
535 struct __kernel_sockaddr_storage gr_group
536 __aligned(4);
537} __packed;
538
539struct compat_group_source_req {
540 __u32 gsr_interface;
541 struct __kernel_sockaddr_storage gsr_group
542 __aligned(4);
543 struct __kernel_sockaddr_storage gsr_source
544 __aligned(4);
545} __packed;
546
547struct compat_group_filter {
548 __u32 gf_interface;
549 struct __kernel_sockaddr_storage gf_group
550 __aligned(4);
551 __u32 gf_fmode;
552 __u32 gf_numsrc;
553 struct __kernel_sockaddr_storage gf_slist[1]
554 __aligned(4);
555} __packed;
556
557#define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \
558 sizeof(struct __kernel_sockaddr_storage))
559
560
561int compat_mc_setsockopt(struct sock *sock, int level, int optname,
562 char __user *optval, unsigned int optlen,
563 int (*setsockopt)(struct sock *, int, int, char __user *, unsigned int))
564{
565 char __user *koptval = optval;
566 int koptlen = optlen;
567
568 switch (optname) {
569 case MCAST_JOIN_GROUP:
570 case MCAST_LEAVE_GROUP:
571 {
572 struct compat_group_req __user *gr32 = (void *)optval;
573 struct group_req __user *kgr =
574 compat_alloc_user_space(sizeof(struct group_req));
575 u32 interface;
576
577 if (!access_ok(VERIFY_READ, gr32, sizeof(*gr32)) ||
578 !access_ok(VERIFY_WRITE, kgr, sizeof(struct group_req)) ||
579 __get_user(interface, &gr32->gr_interface) ||
580 __put_user(interface, &kgr->gr_interface) ||
581 copy_in_user(&kgr->gr_group, &gr32->gr_group,
582 sizeof(kgr->gr_group)))
583 return -EFAULT;
584 koptval = (char __user *)kgr;
585 koptlen = sizeof(struct group_req);
586 break;
587 }
588 case MCAST_JOIN_SOURCE_GROUP:
589 case MCAST_LEAVE_SOURCE_GROUP:
590 case MCAST_BLOCK_SOURCE:
591 case MCAST_UNBLOCK_SOURCE:
592 {
593 struct compat_group_source_req __user *gsr32 = (void *)optval;
594 struct group_source_req __user *kgsr = compat_alloc_user_space(
595 sizeof(struct group_source_req));
596 u32 interface;
597
598 if (!access_ok(VERIFY_READ, gsr32, sizeof(*gsr32)) ||
599 !access_ok(VERIFY_WRITE, kgsr,
600 sizeof(struct group_source_req)) ||
601 __get_user(interface, &gsr32->gsr_interface) ||
602 __put_user(interface, &kgsr->gsr_interface) ||
603 copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group,
604 sizeof(kgsr->gsr_group)) ||
605 copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source,
606 sizeof(kgsr->gsr_source)))
607 return -EFAULT;
608 koptval = (char __user *)kgsr;
609 koptlen = sizeof(struct group_source_req);
610 break;
611 }
612 case MCAST_MSFILTER:
613 {
614 struct compat_group_filter __user *gf32 = (void *)optval;
615 struct group_filter __user *kgf;
616 u32 interface, fmode, numsrc;
617
618 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) ||
619 __get_user(interface, &gf32->gf_interface) ||
620 __get_user(fmode, &gf32->gf_fmode) ||
621 __get_user(numsrc, &gf32->gf_numsrc))
622 return -EFAULT;
623 koptlen = optlen + sizeof(struct group_filter) -
624 sizeof(struct compat_group_filter);
625 if (koptlen < GROUP_FILTER_SIZE(numsrc))
626 return -EINVAL;
627 kgf = compat_alloc_user_space(koptlen);
628 if (!access_ok(VERIFY_WRITE, kgf, koptlen) ||
629 __put_user(interface, &kgf->gf_interface) ||
630 __put_user(fmode, &kgf->gf_fmode) ||
631 __put_user(numsrc, &kgf->gf_numsrc) ||
632 copy_in_user(&kgf->gf_group, &gf32->gf_group,
633 sizeof(kgf->gf_group)) ||
634 (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist,
635 numsrc * sizeof(kgf->gf_slist[0]))))
636 return -EFAULT;
637 koptval = (char __user *)kgf;
638 break;
639 }
640
641 default:
642 break;
643 }
644 return setsockopt(sock, level, optname, koptval, koptlen);
645}
646EXPORT_SYMBOL(compat_mc_setsockopt);
647
648int compat_mc_getsockopt(struct sock *sock, int level, int optname,
649 char __user *optval, int __user *optlen,
650 int (*getsockopt)(struct sock *, int, int, char __user *, int __user *))
651{
652 struct compat_group_filter __user *gf32 = (void *)optval;
653 struct group_filter __user *kgf;
654 int __user *koptlen;
655 u32 interface, fmode, numsrc;
656 int klen, ulen, err;
657
658 if (optname != MCAST_MSFILTER)
659 return getsockopt(sock, level, optname, optval, optlen);
660
661 koptlen = compat_alloc_user_space(sizeof(*koptlen));
662 if (!access_ok(VERIFY_READ, optlen, sizeof(*optlen)) ||
663 __get_user(ulen, optlen))
664 return -EFAULT;
665
666 /* adjust len for pad */
667 klen = ulen + sizeof(*kgf) - sizeof(*gf32);
668
669 if (klen < GROUP_FILTER_SIZE(0))
670 return -EINVAL;
671
672 if (!access_ok(VERIFY_WRITE, koptlen, sizeof(*koptlen)) ||
673 __put_user(klen, koptlen))
674 return -EFAULT;
675
676 /* have to allow space for previous compat_alloc_user_space, too */
677 kgf = compat_alloc_user_space(klen+sizeof(*optlen));
678
679 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) ||
680 __get_user(interface, &gf32->gf_interface) ||
681 __get_user(fmode, &gf32->gf_fmode) ||
682 __get_user(numsrc, &gf32->gf_numsrc) ||
683 __put_user(interface, &kgf->gf_interface) ||
684 __put_user(fmode, &kgf->gf_fmode) ||
685 __put_user(numsrc, &kgf->gf_numsrc) ||
686 copy_in_user(&kgf->gf_group, &gf32->gf_group, sizeof(kgf->gf_group)))
687 return -EFAULT;
688
689 err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen);
690 if (err)
691 return err;
692
693 if (!access_ok(VERIFY_READ, koptlen, sizeof(*koptlen)) ||
694 __get_user(klen, koptlen))
695 return -EFAULT;
696
697 ulen = klen - (sizeof(*kgf)-sizeof(*gf32));
698
699 if (!access_ok(VERIFY_WRITE, optlen, sizeof(*optlen)) ||
700 __put_user(ulen, optlen))
701 return -EFAULT;
702
703 if (!access_ok(VERIFY_READ, kgf, klen) ||
704 !access_ok(VERIFY_WRITE, gf32, ulen) ||
705 __get_user(interface, &kgf->gf_interface) ||
706 __get_user(fmode, &kgf->gf_fmode) ||
707 __get_user(numsrc, &kgf->gf_numsrc) ||
708 __put_user(interface, &gf32->gf_interface) ||
709 __put_user(fmode, &gf32->gf_fmode) ||
710 __put_user(numsrc, &gf32->gf_numsrc))
711 return -EFAULT;
712 if (numsrc) {
713 int copylen;
714
715 klen -= GROUP_FILTER_SIZE(0);
716 copylen = numsrc * sizeof(gf32->gf_slist[0]);
717 if (copylen > klen)
718 copylen = klen;
719 if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen))
720 return -EFAULT;
721 }
722 return err;
723}
724EXPORT_SYMBOL(compat_mc_getsockopt);
725
726
727/* Argument list sizes for compat_sys_socketcall */
728#define AL(x) ((x) * sizeof(u32))
729static unsigned char nas[21] = {
730 AL(0), AL(3), AL(3), AL(3), AL(2), AL(3),
731 AL(3), AL(3), AL(4), AL(4), AL(4), AL(6),
732 AL(6), AL(2), AL(5), AL(5), AL(3), AL(3),
733 AL(4), AL(5), AL(4)
734};
735#undef AL
736
737COMPAT_SYSCALL_DEFINE3(sendmsg, int, fd, struct compat_msghdr __user *, msg, unsigned int, flags)
738{
739 return __sys_sendmsg(fd, (struct user_msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
740}
741
742COMPAT_SYSCALL_DEFINE4(sendmmsg, int, fd, struct compat_mmsghdr __user *, mmsg,
743 unsigned int, vlen, unsigned int, flags)
744{
745 return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
746 flags | MSG_CMSG_COMPAT);
747}
748
749COMPAT_SYSCALL_DEFINE3(recvmsg, int, fd, struct compat_msghdr __user *, msg, unsigned int, flags)
750{
751 return __sys_recvmsg(fd, (struct user_msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
752}
753
754COMPAT_SYSCALL_DEFINE4(recv, int, fd, void __user *, buf, compat_size_t, len, unsigned int, flags)
755{
756 return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT);
757}
758
759COMPAT_SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, buf, compat_size_t, len,
760 unsigned int, flags, struct sockaddr __user *, addr,
761 int __user *, addrlen)
762{
763 return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen);
764}
765
766COMPAT_SYSCALL_DEFINE5(recvmmsg, int, fd, struct compat_mmsghdr __user *, mmsg,
767 unsigned int, vlen, unsigned int, flags,
768 struct compat_timespec __user *, timeout)
769{
770 int datagrams;
771 struct timespec ktspec;
772
773 if (timeout == NULL)
774 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
775 flags | MSG_CMSG_COMPAT, NULL);
776
777 if (compat_get_timespec(&ktspec, timeout))
778 return -EFAULT;
779
780 datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
781 flags | MSG_CMSG_COMPAT, &ktspec);
782 if (datagrams > 0 && compat_put_timespec(&ktspec, timeout))
783 datagrams = -EFAULT;
784
785 return datagrams;
786}
787
788COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user *, args)
789{
790 u32 a[AUDITSC_ARGS];
791 unsigned int len;
792 u32 a0, a1;
793 int ret;
794
795 if (call < SYS_SOCKET || call > SYS_SENDMMSG)
796 return -EINVAL;
797 len = nas[call];
798 if (len > sizeof(a))
799 return -EINVAL;
800
801 if (copy_from_user(a, args, len))
802 return -EFAULT;
803
804 ret = audit_socketcall_compat(len / sizeof(a[0]), a);
805 if (ret)
806 return ret;
807
808 a0 = a[0];
809 a1 = a[1];
810
811 switch (call) {
812 case SYS_SOCKET:
813 ret = sys_socket(a0, a1, a[2]);
814 break;
815 case SYS_BIND:
816 ret = sys_bind(a0, compat_ptr(a1), a[2]);
817 break;
818 case SYS_CONNECT:
819 ret = sys_connect(a0, compat_ptr(a1), a[2]);
820 break;
821 case SYS_LISTEN:
822 ret = sys_listen(a0, a1);
823 break;
824 case SYS_ACCEPT:
825 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0);
826 break;
827 case SYS_GETSOCKNAME:
828 ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
829 break;
830 case SYS_GETPEERNAME:
831 ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2]));
832 break;
833 case SYS_SOCKETPAIR:
834 ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3]));
835 break;
836 case SYS_SEND:
837 ret = sys_send(a0, compat_ptr(a1), a[2], a[3]);
838 break;
839 case SYS_SENDTO:
840 ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]);
841 break;
842 case SYS_RECV:
843 ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]);
844 break;
845 case SYS_RECVFROM:
846 ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3],
847 compat_ptr(a[4]), compat_ptr(a[5]));
848 break;
849 case SYS_SHUTDOWN:
850 ret = sys_shutdown(a0, a1);
851 break;
852 case SYS_SETSOCKOPT:
853 ret = compat_sys_setsockopt(a0, a1, a[2],
854 compat_ptr(a[3]), a[4]);
855 break;
856 case SYS_GETSOCKOPT:
857 ret = compat_sys_getsockopt(a0, a1, a[2],
858 compat_ptr(a[3]), compat_ptr(a[4]));
859 break;
860 case SYS_SENDMSG:
861 ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
862 break;
863 case SYS_SENDMMSG:
864 ret = compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]);
865 break;
866 case SYS_RECVMSG:
867 ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);
868 break;
869 case SYS_RECVMMSG:
870 ret = compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3],
871 compat_ptr(a[4]));
872 break;
873 case SYS_ACCEPT4:
874 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]);
875 break;
876 default:
877 ret = -EINVAL;
878 break;
879 }
880 return ret;
881}
882
generated by cgit at 2024-05-18 13:53:13 (GMT)