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 <linux/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 struct compat_msghdr msg;
41 ssize_t err;
42
43 if (copy_from_user(&msg, umsg, sizeof(*umsg)))
44 return -EFAULT;
45
46 kmsg->msg_flags = msg.msg_flags;
47 kmsg->msg_namelen = msg.msg_namelen;
48
49 if (!msg.msg_name)
50 kmsg->msg_namelen = 0;
51
52 if (kmsg->msg_namelen < 0)
53 return -EINVAL;
54
55 if (kmsg->msg_namelen > sizeof(struct sockaddr_storage))
56 kmsg->msg_namelen = sizeof(struct sockaddr_storage);
57
58 kmsg->msg_control = compat_ptr(msg.msg_control);
59 kmsg->msg_controllen = msg.msg_controllen;
60
61 if (save_addr)
62 *save_addr = compat_ptr(msg.msg_name);
63
64 if (msg.msg_name && kmsg->msg_namelen) {
65 if (!save_addr) {
66 err = move_addr_to_kernel(compat_ptr(msg.msg_name),
67 kmsg->msg_namelen,
68 kmsg->msg_name);
69 if (err < 0)
70 return err;
71 }
72 } else {
73 kmsg->msg_name = NULL;
74 kmsg->msg_namelen = 0;
75 }
76
77 if (msg.msg_iovlen > UIO_MAXIOV)
78 return -EMSGSIZE;
79
80 kmsg->msg_iocb = NULL;
81
82 return compat_import_iovec(save_addr ? READ : WRITE,
83 compat_ptr(msg.msg_iov), msg.msg_iovlen,
84 UIO_FASTIOV, iov, &kmsg->msg_iter);
85}
86
87/* Bleech... */
88#define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32))
89
90#define CMSG_COMPAT_DATA(cmsg) \
91 ((void __user *)((char __user *)(cmsg) + sizeof(struct compat_cmsghdr)))
92#define CMSG_COMPAT_SPACE(len) \
93 (sizeof(struct compat_cmsghdr) + CMSG_COMPAT_ALIGN(len))
94#define CMSG_COMPAT_LEN(len) \
95 (sizeof(struct compat_cmsghdr) + (len))
96
97#define CMSG_COMPAT_FIRSTHDR(msg) \
98 (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \
99 (struct compat_cmsghdr __user *)((msg)->msg_control) : \
100 (struct compat_cmsghdr __user *)NULL)
101
102#define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \
103 ((ucmlen) >= sizeof(struct compat_cmsghdr) && \
104 (ucmlen) <= (unsigned long) \
105 ((mhdr)->msg_controllen - \
106 ((char *)(ucmsg) - (char *)(mhdr)->msg_control)))
107
108static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg,
109 struct compat_cmsghdr __user *cmsg, int cmsg_len)
110{
111 char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len);
112 if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) >
113 msg->msg_controllen)
114 return NULL;
115 return (struct compat_cmsghdr __user *)ptr;
116}
117
118/* There is a lot of hair here because the alignment rules (and
119 * thus placement) of cmsg headers and length are different for
120 * 32-bit apps. -DaveM
121 */
122int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk,
123 unsigned char *stackbuf, int stackbuf_size)
124{
125 struct compat_cmsghdr __user *ucmsg;
126 struct cmsghdr *kcmsg, *kcmsg_base;
127 compat_size_t ucmlen;
128 __kernel_size_t kcmlen, tmp;
129 int err = -EFAULT;
130
131 BUILD_BUG_ON(sizeof(struct compat_cmsghdr) !=
132 CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)));
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 - sizeof(*ucmsg)) + sizeof(struct cmsghdr));
146 tmp = CMSG_ALIGN(tmp);
147 kcmlen += tmp;
148 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
149 }
150 if (kcmlen == 0)
151 return -EINVAL;
152
153 /* The kcmlen holds the 64-bit version of the control length.
154 * It may not be modified as we do not stick it into the kmsg
155 * until we have successfully copied over all of the data
156 * from the user.
157 */
158 if (kcmlen > stackbuf_size)
159 kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL);
160 if (kcmsg == NULL)
161 return -ENOBUFS;
162
163 /* Now copy them over neatly. */
164 memset(kcmsg, 0, kcmlen);
165 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
166 while (ucmsg != NULL) {
167 if (__get_user(ucmlen, &ucmsg->cmsg_len))
168 goto Efault;
169 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
170 goto Einval;
171 tmp = ((ucmlen - sizeof(*ucmsg)) + sizeof(struct cmsghdr));
172 if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp))
173 goto Einval;
174 kcmsg->cmsg_len = tmp;
175 tmp = CMSG_ALIGN(tmp);
176 if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) ||
177 __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) ||
178 copy_from_user(CMSG_DATA(kcmsg),
179 CMSG_COMPAT_DATA(ucmsg),
180 (ucmlen - sizeof(*ucmsg))))
181 goto Efault;
182
183 /* Advance. */
184 kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp);
185 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
186 }
187
188 /*
189 * check the length of messages copied in is the same as the
190 * what we get from the first loop
191 */
192 if ((char *)kcmsg - (char *)kcmsg_base != kcmlen)
193 goto Einval;
194
195 /* Ok, looks like we made it. Hook it up and return success. */
196 kmsg->msg_control = kcmsg_base;
197 kmsg->msg_controllen = kcmlen;
198 return 0;
199
200Einval:
201 err = -EINVAL;
202Efault:
203 if (kcmsg_base != (struct cmsghdr *)stackbuf)
204 sock_kfree_s(sk, kcmsg_base, kcmlen);
205 return err;
206}
207
208int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data)
209{
210 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
211 struct compat_cmsghdr cmhdr;
212 struct old_timeval32 ctv;
213 struct old_timespec32 cts[3];
214 int cmlen;
215
216 if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) {
217 kmsg->msg_flags |= MSG_CTRUNC;
218 return 0; /* XXX: return error? check spec. */
219 }
220
221 if (!COMPAT_USE_64BIT_TIME) {
222 if (level == SOL_SOCKET && type == SO_TIMESTAMP_OLD) {
223 struct __kernel_old_timeval *tv = (struct __kernel_old_timeval *)data;
224 ctv.tv_sec = tv->tv_sec;
225 ctv.tv_usec = tv->tv_usec;
226 data = &ctv;
227 len = sizeof(ctv);
228 }
229 if (level == SOL_SOCKET &&
230 (type == SO_TIMESTAMPNS_OLD || type == SO_TIMESTAMPING_OLD)) {
231 int count = type == SO_TIMESTAMPNS_OLD ? 1 : 3;
232 int i;
233 struct timespec *ts = (struct timespec *)data;
234 for (i = 0; i < count; i++) {
235 cts[i].tv_sec = ts[i].tv_sec;
236 cts[i].tv_nsec = ts[i].tv_nsec;
237 }
238 data = &cts;
239 len = sizeof(cts[0]) * count;
240 }
241 }
242
243 cmlen = CMSG_COMPAT_LEN(len);
244 if (kmsg->msg_controllen < cmlen) {
245 kmsg->msg_flags |= MSG_CTRUNC;
246 cmlen = kmsg->msg_controllen;
247 }
248 cmhdr.cmsg_level = level;
249 cmhdr.cmsg_type = type;
250 cmhdr.cmsg_len = cmlen;
251
252 if (copy_to_user(cm, &cmhdr, sizeof cmhdr))
253 return -EFAULT;
254 if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr)))
255 return -EFAULT;
256 cmlen = CMSG_COMPAT_SPACE(len);
257 if (kmsg->msg_controllen < cmlen)
258 cmlen = kmsg->msg_controllen;
259 kmsg->msg_control += cmlen;
260 kmsg->msg_controllen -= cmlen;
261 return 0;
262}
263
264void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm)
265{
266 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
267 int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int);
268 int fdnum = scm->fp->count;
269 struct file **fp = scm->fp->fp;
270 int __user *cmfptr;
271 int err = 0, i;
272
273 if (fdnum < fdmax)
274 fdmax = fdnum;
275
276 for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) {
277 int new_fd;
278 err = security_file_receive(fp[i]);
279 if (err)
280 break;
281 err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags
282 ? O_CLOEXEC : 0);
283 if (err < 0)
284 break;
285 new_fd = err;
286 err = put_user(new_fd, cmfptr);
287 if (err) {
288 put_unused_fd(new_fd);
289 break;
290 }
291 /* Bump the usage count and install the file. */
292 fd_install(new_fd, get_file(fp[i]));
293 }
294
295 if (i > 0) {
296 int cmlen = CMSG_COMPAT_LEN(i * sizeof(int));
297 err = put_user(SOL_SOCKET, &cm->cmsg_level);
298 if (!err)
299 err = put_user(SCM_RIGHTS, &cm->cmsg_type);
300 if (!err)
301 err = put_user(cmlen, &cm->cmsg_len);
302 if (!err) {
303 cmlen = CMSG_COMPAT_SPACE(i * sizeof(int));
304 kmsg->msg_control += cmlen;
305 kmsg->msg_controllen -= cmlen;
306 }
307 }
308 if (i < fdnum)
309 kmsg->msg_flags |= MSG_CTRUNC;
310
311 /*
312 * All of the files that fit in the message have had their
313 * usage counts incremented, so we just free the list.
314 */
315 __scm_destroy(scm);
316}
317
318/* allocate a 64-bit sock_fprog on the user stack for duration of syscall. */
319struct sock_fprog __user *get_compat_bpf_fprog(char __user *optval)
320{
321 struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval;
322 struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog));
323 struct compat_sock_fprog f32;
324 struct sock_fprog f;
325
326 if (copy_from_user(&f32, fprog32, sizeof(*fprog32)))
327 return NULL;
328 memset(&f, 0, sizeof(f));
329 f.len = f32.len;
330 f.filter = compat_ptr(f32.filter);
331 if (copy_to_user(kfprog, &f, sizeof(struct sock_fprog)))
332 return NULL;
333
334 return kfprog;
335}
336EXPORT_SYMBOL_GPL(get_compat_bpf_fprog);
337
338static int do_set_attach_filter(struct socket *sock, int level, int optname,
339 char __user *optval, unsigned int optlen)
340{
341 struct sock_fprog __user *kfprog;
342
343 kfprog = get_compat_bpf_fprog(optval);
344 if (!kfprog)
345 return -EFAULT;
346
347 return sock_setsockopt(sock, level, optname, (char __user *)kfprog,
348 sizeof(struct sock_fprog));
349}
350
351static int compat_sock_setsockopt(struct socket *sock, int level, int optname,
352 char __user *optval, unsigned int optlen)
353{
354 if (optname == SO_ATTACH_FILTER ||
355 optname == SO_ATTACH_REUSEPORT_CBPF)
356 return do_set_attach_filter(sock, level, optname,
357 optval, optlen);
358 return sock_setsockopt(sock, level, optname, optval, optlen);
359}
360
361static int __compat_sys_setsockopt(int fd, int level, int optname,
362 char __user *optval, unsigned int optlen)
363{
364 int err;
365 struct socket *sock;
366
367 if (optlen > INT_MAX)
368 return -EINVAL;
369
370 sock = sockfd_lookup(fd, &err);
371 if (sock) {
372 err = security_socket_setsockopt(sock, level, optname);
373 if (err) {
374 sockfd_put(sock);
375 return err;
376 }
377
378 if (level == SOL_SOCKET)
379 err = compat_sock_setsockopt(sock, level,
380 optname, optval, optlen);
381 else if (sock->ops->compat_setsockopt)
382 err = sock->ops->compat_setsockopt(sock, level,
383 optname, optval, optlen);
384 else
385 err = sock->ops->setsockopt(sock, level,
386 optname, optval, optlen);
387 sockfd_put(sock);
388 }
389 return err;
390}
391
392COMPAT_SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname,
393 char __user *, optval, unsigned int, optlen)
394{
395 return __compat_sys_setsockopt(fd, level, optname, optval, optlen);
396}
397
398int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp)
399{
400 struct compat_timeval __user *ctv;
401 int err;
402 struct timeval tv;
403
404 if (COMPAT_USE_64BIT_TIME)
405 return sock_get_timestamp(sk, userstamp);
406
407 ctv = (struct compat_timeval __user *) userstamp;
408 err = -ENOENT;
409 sock_enable_timestamp(sk, SOCK_TIMESTAMP);
410 tv = ktime_to_timeval(sock_read_timestamp(sk));
411
412 if (tv.tv_sec == -1)
413 return err;
414 if (tv.tv_sec == 0) {
415 ktime_t kt = ktime_get_real();
416 sock_write_timestamp(sk, kt);
417 tv = ktime_to_timeval(kt);
418 }
419 err = 0;
420 if (put_user(tv.tv_sec, &ctv->tv_sec) ||
421 put_user(tv.tv_usec, &ctv->tv_usec))
422 err = -EFAULT;
423 return err;
424}
425EXPORT_SYMBOL(compat_sock_get_timestamp);
426
427int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp)
428{
429 struct compat_timespec __user *ctv;
430 int err;
431 struct timespec ts;
432
433 if (COMPAT_USE_64BIT_TIME)
434 return sock_get_timestampns (sk, userstamp);
435
436 ctv = (struct compat_timespec __user *) userstamp;
437 err = -ENOENT;
438 sock_enable_timestamp(sk, SOCK_TIMESTAMP);
439 ts = ktime_to_timespec(sock_read_timestamp(sk));
440 if (ts.tv_sec == -1)
441 return err;
442 if (ts.tv_sec == 0) {
443 ktime_t kt = ktime_get_real();
444 sock_write_timestamp(sk, kt);
445 ts = ktime_to_timespec(kt);
446 }
447 err = 0;
448 if (put_user(ts.tv_sec, &ctv->tv_sec) ||
449 put_user(ts.tv_nsec, &ctv->tv_nsec))
450 err = -EFAULT;
451 return err;
452}
453EXPORT_SYMBOL(compat_sock_get_timestampns);
454
455static int __compat_sys_getsockopt(int fd, int level, int optname,
456 char __user *optval,
457 int __user *optlen)
458{
459 int err;
460 struct socket *sock = sockfd_lookup(fd, &err);
461
462 if (sock) {
463 err = security_socket_getsockopt(sock, level, optname);
464 if (err) {
465 sockfd_put(sock);
466 return err;
467 }
468
469 if (level == SOL_SOCKET)
470 err = sock_getsockopt(sock, level,
471 optname, optval, optlen);
472 else if (sock->ops->compat_getsockopt)
473 err = sock->ops->compat_getsockopt(sock, level,
474 optname, optval, optlen);
475 else
476 err = sock->ops->getsockopt(sock, level,
477 optname, optval, optlen);
478 sockfd_put(sock);
479 }
480 return err;
481}
482
483COMPAT_SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname,
484 char __user *, optval, int __user *, optlen)
485{
486 return __compat_sys_getsockopt(fd, level, optname, optval, optlen);
487}
488
489struct compat_group_req {
490 __u32 gr_interface;
491 struct __kernel_sockaddr_storage gr_group
492 __aligned(4);
493} __packed;
494
495struct compat_group_source_req {
496 __u32 gsr_interface;
497 struct __kernel_sockaddr_storage gsr_group
498 __aligned(4);
499 struct __kernel_sockaddr_storage gsr_source
500 __aligned(4);
501} __packed;
502
503struct compat_group_filter {
504 __u32 gf_interface;
505 struct __kernel_sockaddr_storage gf_group
506 __aligned(4);
507 __u32 gf_fmode;
508 __u32 gf_numsrc;
509 struct __kernel_sockaddr_storage gf_slist[1]
510 __aligned(4);
511} __packed;
512
513#define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \
514 sizeof(struct __kernel_sockaddr_storage))
515
516
517int compat_mc_setsockopt(struct sock *sock, int level, int optname,
518 char __user *optval, unsigned int optlen,
519 int (*setsockopt)(struct sock *, int, int, char __user *, unsigned int))
520{
521 char __user *koptval = optval;
522 int koptlen = optlen;
523
524 switch (optname) {
525 case MCAST_JOIN_GROUP:
526 case MCAST_LEAVE_GROUP:
527 {
528 struct compat_group_req __user *gr32 = (void __user *)optval;
529 struct group_req __user *kgr =
530 compat_alloc_user_space(sizeof(struct group_req));
531 u32 interface;
532
533 if (!access_ok(gr32, sizeof(*gr32)) ||
534 !access_ok(kgr, sizeof(struct group_req)) ||
535 __get_user(interface, &gr32->gr_interface) ||
536 __put_user(interface, &kgr->gr_interface) ||
537 copy_in_user(&kgr->gr_group, &gr32->gr_group,
538 sizeof(kgr->gr_group)))
539 return -EFAULT;
540 koptval = (char __user *)kgr;
541 koptlen = sizeof(struct group_req);
542 break;
543 }
544 case MCAST_JOIN_SOURCE_GROUP:
545 case MCAST_LEAVE_SOURCE_GROUP:
546 case MCAST_BLOCK_SOURCE:
547 case MCAST_UNBLOCK_SOURCE:
548 {
549 struct compat_group_source_req __user *gsr32 = (void __user *)optval;
550 struct group_source_req __user *kgsr = compat_alloc_user_space(
551 sizeof(struct group_source_req));
552 u32 interface;
553
554 if (!access_ok(gsr32, sizeof(*gsr32)) ||
555 !access_ok(kgsr,
556 sizeof(struct group_source_req)) ||
557 __get_user(interface, &gsr32->gsr_interface) ||
558 __put_user(interface, &kgsr->gsr_interface) ||
559 copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group,
560 sizeof(kgsr->gsr_group)) ||
561 copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source,
562 sizeof(kgsr->gsr_source)))
563 return -EFAULT;
564 koptval = (char __user *)kgsr;
565 koptlen = sizeof(struct group_source_req);
566 break;
567 }
568 case MCAST_MSFILTER:
569 {
570 struct compat_group_filter __user *gf32 = (void __user *)optval;
571 struct group_filter __user *kgf;
572 u32 interface, fmode, numsrc;
573
574 if (!access_ok(gf32, __COMPAT_GF0_SIZE) ||
575 __get_user(interface, &gf32->gf_interface) ||
576 __get_user(fmode, &gf32->gf_fmode) ||
577 __get_user(numsrc, &gf32->gf_numsrc))
578 return -EFAULT;
579 koptlen = optlen + sizeof(struct group_filter) -
580 sizeof(struct compat_group_filter);
581 if (koptlen < GROUP_FILTER_SIZE(numsrc))
582 return -EINVAL;
583 kgf = compat_alloc_user_space(koptlen);
584 if (!access_ok(kgf, koptlen) ||
585 __put_user(interface, &kgf->gf_interface) ||
586 __put_user(fmode, &kgf->gf_fmode) ||
587 __put_user(numsrc, &kgf->gf_numsrc) ||
588 copy_in_user(&kgf->gf_group, &gf32->gf_group,
589 sizeof(kgf->gf_group)) ||
590 (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist,
591 numsrc * sizeof(kgf->gf_slist[0]))))
592 return -EFAULT;
593 koptval = (char __user *)kgf;
594 break;
595 }
596
597 default:
598 break;
599 }
600 return setsockopt(sock, level, optname, koptval, koptlen);
601}
602EXPORT_SYMBOL(compat_mc_setsockopt);
603
604int compat_mc_getsockopt(struct sock *sock, int level, int optname,
605 char __user *optval, int __user *optlen,
606 int (*getsockopt)(struct sock *, int, int, char __user *, int __user *))
607{
608 struct compat_group_filter __user *gf32 = (void __user *)optval;
609 struct group_filter __user *kgf;
610 int __user *koptlen;
611 u32 interface, fmode, numsrc;
612 int klen, ulen, err;
613
614 if (optname != MCAST_MSFILTER)
615 return getsockopt(sock, level, optname, optval, optlen);
616
617 koptlen = compat_alloc_user_space(sizeof(*koptlen));
618 if (!access_ok(optlen, sizeof(*optlen)) ||
619 __get_user(ulen, optlen))
620 return -EFAULT;
621
622 /* adjust len for pad */
623 klen = ulen + sizeof(*kgf) - sizeof(*gf32);
624
625 if (klen < GROUP_FILTER_SIZE(0))
626 return -EINVAL;
627
628 if (!access_ok(koptlen, sizeof(*koptlen)) ||
629 __put_user(klen, koptlen))
630 return -EFAULT;
631
632 /* have to allow space for previous compat_alloc_user_space, too */
633 kgf = compat_alloc_user_space(klen+sizeof(*optlen));
634
635 if (!access_ok(gf32, __COMPAT_GF0_SIZE) ||
636 __get_user(interface, &gf32->gf_interface) ||
637 __get_user(fmode, &gf32->gf_fmode) ||
638 __get_user(numsrc, &gf32->gf_numsrc) ||
639 __put_user(interface, &kgf->gf_interface) ||
640 __put_user(fmode, &kgf->gf_fmode) ||
641 __put_user(numsrc, &kgf->gf_numsrc) ||
642 copy_in_user(&kgf->gf_group, &gf32->gf_group, sizeof(kgf->gf_group)))
643 return -EFAULT;
644
645 err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen);
646 if (err)
647 return err;
648
649 if (!access_ok(koptlen, sizeof(*koptlen)) ||
650 __get_user(klen, koptlen))
651 return -EFAULT;
652
653 ulen = klen - (sizeof(*kgf)-sizeof(*gf32));
654
655 if (!access_ok(optlen, sizeof(*optlen)) ||
656 __put_user(ulen, optlen))
657 return -EFAULT;
658
659 if (!access_ok(kgf, klen) ||
660 !access_ok(gf32, ulen) ||
661 __get_user(interface, &kgf->gf_interface) ||
662 __get_user(fmode, &kgf->gf_fmode) ||
663 __get_user(numsrc, &kgf->gf_numsrc) ||
664 __put_user(interface, &gf32->gf_interface) ||
665 __put_user(fmode, &gf32->gf_fmode) ||
666 __put_user(numsrc, &gf32->gf_numsrc))
667 return -EFAULT;
668 if (numsrc) {
669 int copylen;
670
671 klen -= GROUP_FILTER_SIZE(0);
672 copylen = numsrc * sizeof(gf32->gf_slist[0]);
673 if (copylen > klen)
674 copylen = klen;
675 if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen))
676 return -EFAULT;
677 }
678 return err;
679}
680EXPORT_SYMBOL(compat_mc_getsockopt);
681
682
683/* Argument list sizes for compat_sys_socketcall */
684#define AL(x) ((x) * sizeof(u32))
685static unsigned char nas[21] = {
686 AL(0), AL(3), AL(3), AL(3), AL(2), AL(3),
687 AL(3), AL(3), AL(4), AL(4), AL(4), AL(6),
688 AL(6), AL(2), AL(5), AL(5), AL(3), AL(3),
689 AL(4), AL(5), AL(4)
690};
691#undef AL
692
693static inline long __compat_sys_sendmsg(int fd,
694 struct compat_msghdr __user *msg,
695 unsigned int flags)
696{
697 return __sys_sendmsg(fd, (struct user_msghdr __user *)msg,
698 flags | MSG_CMSG_COMPAT, false);
699}
700
701COMPAT_SYSCALL_DEFINE3(sendmsg, int, fd, struct compat_msghdr __user *, msg,
702 unsigned int, flags)
703{
704 return __compat_sys_sendmsg(fd, msg, flags);
705}
706
707static inline long __compat_sys_sendmmsg(int fd,
708 struct compat_mmsghdr __user *mmsg,
709 unsigned int vlen, unsigned int flags)
710{
711 return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
712 flags | MSG_CMSG_COMPAT, false);
713}
714
715COMPAT_SYSCALL_DEFINE4(sendmmsg, int, fd, struct compat_mmsghdr __user *, mmsg,
716 unsigned int, vlen, unsigned int, flags)
717{
718 return __compat_sys_sendmmsg(fd, mmsg, vlen, flags);
719}
720
721static inline long __compat_sys_recvmsg(int fd,
722 struct compat_msghdr __user *msg,
723 unsigned int flags)
724{
725 return __sys_recvmsg(fd, (struct user_msghdr __user *)msg,
726 flags | MSG_CMSG_COMPAT, false);
727}
728
729COMPAT_SYSCALL_DEFINE3(recvmsg, int, fd, struct compat_msghdr __user *, msg,
730 unsigned int, flags)
731{
732 return __compat_sys_recvmsg(fd, msg, flags);
733}
734
735static inline long __compat_sys_recvfrom(int fd, void __user *buf,
736 compat_size_t len, unsigned int flags,
737 struct sockaddr __user *addr,
738 int __user *addrlen)
739{
740 return __sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr,
741 addrlen);
742}
743
744COMPAT_SYSCALL_DEFINE4(recv, int, fd, void __user *, buf, compat_size_t, len, unsigned int, flags)
745{
746 return __compat_sys_recvfrom(fd, buf, len, flags, NULL, NULL);
747}
748
749COMPAT_SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, buf, compat_size_t, len,
750 unsigned int, flags, struct sockaddr __user *, addr,
751 int __user *, addrlen)
752{
753 return __compat_sys_recvfrom(fd, buf, len, flags, addr, addrlen);
754}
755
756COMPAT_SYSCALL_DEFINE5(recvmmsg_time64, int, fd, struct compat_mmsghdr __user *, mmsg,
757 unsigned int, vlen, unsigned int, flags,
758 struct __kernel_timespec __user *, timeout)
759{
760 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
761 flags | MSG_CMSG_COMPAT, timeout, NULL);
762}
763
764#ifdef CONFIG_COMPAT_32BIT_TIME
765COMPAT_SYSCALL_DEFINE5(recvmmsg_time32, int, fd, struct compat_mmsghdr __user *, mmsg,
766 unsigned int, vlen, unsigned int, flags,
767 struct old_timespec32 __user *, timeout)
768{
769 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
770 flags | MSG_CMSG_COMPAT, NULL, timeout);
771}
772#endif
773
774COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user *, args)
775{
776 u32 a[AUDITSC_ARGS];
777 unsigned int len;
778 u32 a0, a1;
779 int ret;
780
781 if (call < SYS_SOCKET || call > SYS_SENDMMSG)
782 return -EINVAL;
783 len = nas[call];
784 if (len > sizeof(a))
785 return -EINVAL;
786
787 if (copy_from_user(a, args, len))
788 return -EFAULT;
789
790 ret = audit_socketcall_compat(len / sizeof(a[0]), a);
791 if (ret)
792 return ret;
793
794 a0 = a[0];
795 a1 = a[1];
796
797 switch (call) {
798 case SYS_SOCKET:
799 ret = __sys_socket(a0, a1, a[2]);
800 break;
801 case SYS_BIND:
802 ret = __sys_bind(a0, compat_ptr(a1), a[2]);
803 break;
804 case SYS_CONNECT:
805 ret = __sys_connect(a0, compat_ptr(a1), a[2]);
806 break;
807 case SYS_LISTEN:
808 ret = __sys_listen(a0, a1);
809 break;
810 case SYS_ACCEPT:
811 ret = __sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0);
812 break;
813 case SYS_GETSOCKNAME:
814 ret = __sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
815 break;
816 case SYS_GETPEERNAME:
817 ret = __sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2]));
818 break;
819 case SYS_SOCKETPAIR:
820 ret = __sys_socketpair(a0, a1, a[2], compat_ptr(a[3]));
821 break;
822 case SYS_SEND:
823 ret = __sys_sendto(a0, compat_ptr(a1), a[2], a[3], NULL, 0);
824 break;
825 case SYS_SENDTO:
826 ret = __sys_sendto(a0, compat_ptr(a1), a[2], a[3],
827 compat_ptr(a[4]), a[5]);
828 break;
829 case SYS_RECV:
830 ret = __compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3],
831 NULL, NULL);
832 break;
833 case SYS_RECVFROM:
834 ret = __compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3],
835 compat_ptr(a[4]),
836 compat_ptr(a[5]));
837 break;
838 case SYS_SHUTDOWN:
839 ret = __sys_shutdown(a0, a1);
840 break;
841 case SYS_SETSOCKOPT:
842 ret = __compat_sys_setsockopt(a0, a1, a[2],
843 compat_ptr(a[3]), a[4]);
844 break;
845 case SYS_GETSOCKOPT:
846 ret = __compat_sys_getsockopt(a0, a1, a[2],
847 compat_ptr(a[3]),
848 compat_ptr(a[4]));
849 break;
850 case SYS_SENDMSG:
851 ret = __compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
852 break;
853 case SYS_SENDMMSG:
854 ret = __compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]);
855 break;
856 case SYS_RECVMSG:
857 ret = __compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);
858 break;
859 case SYS_RECVMMSG:
860 ret = __sys_recvmmsg(a0, compat_ptr(a1), a[2],
861 a[3] | MSG_CMSG_COMPAT, NULL,
862 compat_ptr(a[4]));
863 break;
864 case SYS_ACCEPT4:
865 ret = __sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]);
866 break;
867 default:
868 ret = -EINVAL;
869 break;
870 }
871 return ret;
872}
873