Commit | Line | Data |
---|---|---|
4768fbcb | 1 | /* |
1da177e4 LT |
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> | |
4768fbcb | 11 | * Copyright (C) 2000,2001 Andi Kleen, SuSE Labs |
1da177e4 LT |
12 | */ |
13 | ||
14 | #include <linux/kernel.h> | |
5a0e3ad6 | 15 | #include <linux/gfp.h> |
1da177e4 | 16 | #include <linux/fs.h> |
1da177e4 LT |
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> | |
1da177e4 | 24 | #include <linux/security.h> |
bc3b2d7f | 25 | #include <linux/export.h> |
1da177e4 LT |
26 | |
27 | #include <net/scm.h> | |
28 | #include <net/sock.h> | |
dae50295 DS |
29 | #include <net/ip.h> |
30 | #include <net/ipv6.h> | |
1da177e4 LT |
31 | #include <asm/uaccess.h> |
32 | #include <net/compat.h> | |
33 | ||
34 | static inline int iov_from_user_compat_to_kern(struct iovec *kiov, | |
35 | struct compat_iovec __user *uiov32, | |
36 | int niov) | |
37 | { | |
38 | int tot_len = 0; | |
39 | ||
e71a4783 | 40 | while (niov > 0) { |
1da177e4 LT |
41 | compat_uptr_t buf; |
42 | compat_size_t len; | |
43 | ||
e71a4783 | 44 | if (get_user(len, &uiov32->iov_len) || |
8acfe468 DM |
45 | get_user(buf, &uiov32->iov_base)) |
46 | return -EFAULT; | |
47 | ||
48 | if (len > INT_MAX - tot_len) | |
49 | len = INT_MAX - tot_len; | |
50 | ||
1da177e4 LT |
51 | tot_len += len; |
52 | kiov->iov_base = compat_ptr(buf); | |
53 | kiov->iov_len = (__kernel_size_t) len; | |
54 | uiov32++; | |
55 | kiov++; | |
56 | niov--; | |
57 | } | |
58 | return tot_len; | |
59 | } | |
60 | ||
61 | int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg) | |
62 | { | |
63 | compat_uptr_t tmp1, tmp2, tmp3; | |
64 | ||
65 | if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) || | |
66 | __get_user(tmp1, &umsg->msg_name) || | |
67 | __get_user(kmsg->msg_namelen, &umsg->msg_namelen) || | |
68 | __get_user(tmp2, &umsg->msg_iov) || | |
69 | __get_user(kmsg->msg_iovlen, &umsg->msg_iovlen) || | |
70 | __get_user(tmp3, &umsg->msg_control) || | |
71 | __get_user(kmsg->msg_controllen, &umsg->msg_controllen) || | |
72 | __get_user(kmsg->msg_flags, &umsg->msg_flags)) | |
73 | return -EFAULT; | |
1661bf36 | 74 | if (kmsg->msg_namelen > sizeof(struct sockaddr_storage)) |
db31c55a | 75 | kmsg->msg_namelen = sizeof(struct sockaddr_storage); |
1da177e4 LT |
76 | kmsg->msg_name = compat_ptr(tmp1); |
77 | kmsg->msg_iov = compat_ptr(tmp2); | |
78 | kmsg->msg_control = compat_ptr(tmp3); | |
79 | return 0; | |
80 | } | |
81 | ||
82 | /* I've named the args so it is easy to tell whose space the pointers are in. */ | |
83 | int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov, | |
43db362d | 84 | struct sockaddr_storage *kern_address, int mode) |
1da177e4 LT |
85 | { |
86 | int tot_len; | |
87 | ||
40eea803 | 88 | if (kern_msg->msg_name && kern_msg->msg_namelen) { |
c6d409cf | 89 | if (mode == VERIFY_READ) { |
1da177e4 LT |
90 | int err = move_addr_to_kernel(kern_msg->msg_name, |
91 | kern_msg->msg_namelen, | |
92 | kern_address); | |
e71a4783 | 93 | if (err < 0) |
1da177e4 LT |
94 | return err; |
95 | } | |
40eea803 AR |
96 | kern_msg->msg_name = kern_address; |
97 | } else { | |
1da177e4 | 98 | kern_msg->msg_name = NULL; |
40eea803 AR |
99 | kern_msg->msg_namelen = 0; |
100 | } | |
1da177e4 | 101 | |
1da177e4 LT |
102 | tot_len = iov_from_user_compat_to_kern(kern_iov, |
103 | (struct compat_iovec __user *)kern_msg->msg_iov, | |
104 | kern_msg->msg_iovlen); | |
e71a4783 | 105 | if (tot_len >= 0) |
1da177e4 | 106 | kern_msg->msg_iov = kern_iov; |
1da177e4 LT |
107 | |
108 | return tot_len; | |
109 | } | |
110 | ||
111 | /* Bleech... */ | |
112 | #define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32)) | |
113 | ||
114 | #define CMSG_COMPAT_DATA(cmsg) \ | |
115 | ((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)))) | |
116 | #define CMSG_COMPAT_SPACE(len) \ | |
117 | (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len)) | |
118 | #define CMSG_COMPAT_LEN(len) \ | |
119 | (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len)) | |
120 | ||
121 | #define CMSG_COMPAT_FIRSTHDR(msg) \ | |
122 | (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \ | |
123 | (struct compat_cmsghdr __user *)((msg)->msg_control) : \ | |
124 | (struct compat_cmsghdr __user *)NULL) | |
125 | ||
126 | #define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \ | |
127 | ((ucmlen) >= sizeof(struct compat_cmsghdr) && \ | |
128 | (ucmlen) <= (unsigned long) \ | |
129 | ((mhdr)->msg_controllen - \ | |
130 | ((char *)(ucmsg) - (char *)(mhdr)->msg_control))) | |
131 | ||
132 | static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg, | |
133 | struct compat_cmsghdr __user *cmsg, int cmsg_len) | |
134 | { | |
135 | char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len); | |
136 | if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) > | |
137 | msg->msg_controllen) | |
138 | return NULL; | |
139 | return (struct compat_cmsghdr __user *)ptr; | |
140 | } | |
141 | ||
142 | /* There is a lot of hair here because the alignment rules (and | |
143 | * thus placement) of cmsg headers and length are different for | |
144 | * 32-bit apps. -DaveM | |
145 | */ | |
8920e8f9 | 146 | int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk, |
1da177e4 LT |
147 | unsigned char *stackbuf, int stackbuf_size) |
148 | { | |
149 | struct compat_cmsghdr __user *ucmsg; | |
150 | struct cmsghdr *kcmsg, *kcmsg_base; | |
151 | compat_size_t ucmlen; | |
152 | __kernel_size_t kcmlen, tmp; | |
8920e8f9 | 153 | int err = -EFAULT; |
1da177e4 LT |
154 | |
155 | kcmlen = 0; | |
156 | kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf; | |
157 | ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); | |
e71a4783 SH |
158 | while (ucmsg != NULL) { |
159 | if (get_user(ucmlen, &ucmsg->cmsg_len)) | |
1da177e4 LT |
160 | return -EFAULT; |
161 | ||
162 | /* Catch bogons. */ | |
163 | if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) | |
164 | return -EINVAL; | |
165 | ||
166 | tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + | |
167 | CMSG_ALIGN(sizeof(struct cmsghdr))); | |
8920e8f9 | 168 | tmp = CMSG_ALIGN(tmp); |
1da177e4 LT |
169 | kcmlen += tmp; |
170 | ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); | |
171 | } | |
e71a4783 | 172 | if (kcmlen == 0) |
1da177e4 LT |
173 | return -EINVAL; |
174 | ||
175 | /* The kcmlen holds the 64-bit version of the control length. | |
176 | * It may not be modified as we do not stick it into the kmsg | |
177 | * until we have successfully copied over all of the data | |
178 | * from the user. | |
179 | */ | |
8920e8f9 AV |
180 | if (kcmlen > stackbuf_size) |
181 | kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL); | |
182 | if (kcmsg == NULL) | |
1da177e4 LT |
183 | return -ENOBUFS; |
184 | ||
185 | /* Now copy them over neatly. */ | |
186 | memset(kcmsg, 0, kcmlen); | |
187 | ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); | |
e71a4783 | 188 | while (ucmsg != NULL) { |
8920e8f9 AV |
189 | if (__get_user(ucmlen, &ucmsg->cmsg_len)) |
190 | goto Efault; | |
191 | if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) | |
192 | goto Einval; | |
1da177e4 LT |
193 | tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + |
194 | CMSG_ALIGN(sizeof(struct cmsghdr))); | |
8920e8f9 AV |
195 | if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp)) |
196 | goto Einval; | |
1da177e4 | 197 | kcmsg->cmsg_len = tmp; |
8920e8f9 AV |
198 | tmp = CMSG_ALIGN(tmp); |
199 | if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) || | |
200 | __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) || | |
201 | copy_from_user(CMSG_DATA(kcmsg), | |
202 | CMSG_COMPAT_DATA(ucmsg), | |
203 | (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))))) | |
204 | goto Efault; | |
1da177e4 LT |
205 | |
206 | /* Advance. */ | |
8920e8f9 | 207 | kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp); |
1da177e4 LT |
208 | ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); |
209 | } | |
210 | ||
211 | /* Ok, looks like we made it. Hook it up and return success. */ | |
212 | kmsg->msg_control = kcmsg_base; | |
213 | kmsg->msg_controllen = kcmlen; | |
214 | return 0; | |
215 | ||
8920e8f9 AV |
216 | Einval: |
217 | err = -EINVAL; | |
218 | Efault: | |
219 | if (kcmsg_base != (struct cmsghdr *)stackbuf) | |
220 | sock_kfree_s(sk, kcmsg_base, kcmlen); | |
221 | return err; | |
1da177e4 LT |
222 | } |
223 | ||
224 | int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data) | |
225 | { | |
1da177e4 LT |
226 | struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; |
227 | struct compat_cmsghdr cmhdr; | |
81881047 JJ |
228 | struct compat_timeval ctv; |
229 | struct compat_timespec cts[3]; | |
1da177e4 LT |
230 | int cmlen; |
231 | ||
e71a4783 | 232 | if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) { |
1da177e4 LT |
233 | kmsg->msg_flags |= MSG_CTRUNC; |
234 | return 0; /* XXX: return error? check spec. */ | |
235 | } | |
236 | ||
ee4fa23c | 237 | if (!COMPAT_USE_64BIT_TIME) { |
ee4fa23c L |
238 | if (level == SOL_SOCKET && type == SCM_TIMESTAMP) { |
239 | struct timeval *tv = (struct timeval *)data; | |
240 | ctv.tv_sec = tv->tv_sec; | |
241 | ctv.tv_usec = tv->tv_usec; | |
242 | data = &ctv; | |
243 | len = sizeof(ctv); | |
244 | } | |
245 | if (level == SOL_SOCKET && | |
246 | (type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) { | |
247 | int count = type == SCM_TIMESTAMPNS ? 1 : 3; | |
248 | int i; | |
249 | struct timespec *ts = (struct timespec *)data; | |
250 | for (i = 0; i < count; i++) { | |
251 | cts[i].tv_sec = ts[i].tv_sec; | |
252 | cts[i].tv_nsec = ts[i].tv_nsec; | |
253 | } | |
254 | data = &cts; | |
255 | len = sizeof(cts[0]) * count; | |
20d49473 | 256 | } |
4768fbcb YH |
257 | } |
258 | ||
1da177e4 | 259 | cmlen = CMSG_COMPAT_LEN(len); |
e71a4783 | 260 | if (kmsg->msg_controllen < cmlen) { |
1da177e4 LT |
261 | kmsg->msg_flags |= MSG_CTRUNC; |
262 | cmlen = kmsg->msg_controllen; | |
263 | } | |
264 | cmhdr.cmsg_level = level; | |
265 | cmhdr.cmsg_type = type; | |
266 | cmhdr.cmsg_len = cmlen; | |
267 | ||
e71a4783 | 268 | if (copy_to_user(cm, &cmhdr, sizeof cmhdr)) |
1da177e4 | 269 | return -EFAULT; |
e71a4783 | 270 | if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr))) |
1da177e4 LT |
271 | return -EFAULT; |
272 | cmlen = CMSG_COMPAT_SPACE(len); | |
1ac70e7a WY |
273 | if (kmsg->msg_controllen < cmlen) |
274 | cmlen = kmsg->msg_controllen; | |
1da177e4 LT |
275 | kmsg->msg_control += cmlen; |
276 | kmsg->msg_controllen -= cmlen; | |
277 | return 0; | |
278 | } | |
279 | ||
280 | void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm) | |
281 | { | |
282 | struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; | |
283 | int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int); | |
284 | int fdnum = scm->fp->count; | |
285 | struct file **fp = scm->fp->fp; | |
286 | int __user *cmfptr; | |
287 | int err = 0, i; | |
288 | ||
289 | if (fdnum < fdmax) | |
290 | fdmax = fdnum; | |
291 | ||
292 | for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) { | |
293 | int new_fd; | |
294 | err = security_file_receive(fp[i]); | |
295 | if (err) | |
296 | break; | |
4a19542e UD |
297 | err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags |
298 | ? O_CLOEXEC : 0); | |
1da177e4 LT |
299 | if (err < 0) |
300 | break; | |
301 | new_fd = err; | |
302 | err = put_user(new_fd, cmfptr); | |
303 | if (err) { | |
304 | put_unused_fd(new_fd); | |
305 | break; | |
306 | } | |
307 | /* Bump the usage count and install the file. */ | |
cb0942b8 | 308 | fd_install(new_fd, get_file(fp[i])); |
1da177e4 LT |
309 | } |
310 | ||
311 | if (i > 0) { | |
312 | int cmlen = CMSG_COMPAT_LEN(i * sizeof(int)); | |
effee6a0 | 313 | err = put_user(SOL_SOCKET, &cm->cmsg_level); |
1da177e4 LT |
314 | if (!err) |
315 | err = put_user(SCM_RIGHTS, &cm->cmsg_type); | |
316 | if (!err) | |
317 | err = put_user(cmlen, &cm->cmsg_len); | |
318 | if (!err) { | |
319 | cmlen = CMSG_COMPAT_SPACE(i * sizeof(int)); | |
320 | kmsg->msg_control += cmlen; | |
321 | kmsg->msg_controllen -= cmlen; | |
322 | } | |
323 | } | |
324 | if (i < fdnum) | |
325 | kmsg->msg_flags |= MSG_CTRUNC; | |
326 | ||
327 | /* | |
328 | * All of the files that fit in the message have had their | |
329 | * usage counts incremented, so we just free the list. | |
330 | */ | |
331 | __scm_destroy(scm); | |
332 | } | |
333 | ||
3fdadf7d | 334 | static int do_set_attach_filter(struct socket *sock, int level, int optname, |
b7058842 | 335 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
336 | { |
337 | struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval; | |
4768fbcb | 338 | struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog)); |
1da177e4 LT |
339 | compat_uptr_t ptr; |
340 | u16 len; | |
341 | ||
342 | if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) || | |
343 | !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) || | |
344 | __get_user(len, &fprog32->len) || | |
345 | __get_user(ptr, &fprog32->filter) || | |
346 | __put_user(len, &kfprog->len) || | |
347 | __put_user(compat_ptr(ptr), &kfprog->filter)) | |
348 | return -EFAULT; | |
349 | ||
3fdadf7d | 350 | return sock_setsockopt(sock, level, optname, (char __user *)kfprog, |
1da177e4 LT |
351 | sizeof(struct sock_fprog)); |
352 | } | |
353 | ||
3fdadf7d | 354 | static int do_set_sock_timeout(struct socket *sock, int level, |
b7058842 | 355 | int optname, char __user *optval, unsigned int optlen) |
1da177e4 | 356 | { |
c6d409cf | 357 | struct compat_timeval __user *up = (struct compat_timeval __user *)optval; |
1da177e4 LT |
358 | struct timeval ktime; |
359 | mm_segment_t old_fs; | |
360 | int err; | |
361 | ||
362 | if (optlen < sizeof(*up)) | |
363 | return -EINVAL; | |
364 | if (!access_ok(VERIFY_READ, up, sizeof(*up)) || | |
365 | __get_user(ktime.tv_sec, &up->tv_sec) || | |
366 | __get_user(ktime.tv_usec, &up->tv_usec)) | |
367 | return -EFAULT; | |
368 | old_fs = get_fs(); | |
369 | set_fs(KERNEL_DS); | |
c6d409cf | 370 | err = sock_setsockopt(sock, level, optname, (char *)&ktime, sizeof(ktime)); |
1da177e4 LT |
371 | set_fs(old_fs); |
372 | ||
373 | return err; | |
374 | } | |
375 | ||
3fdadf7d | 376 | static int compat_sock_setsockopt(struct socket *sock, int level, int optname, |
b7058842 | 377 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
378 | { |
379 | if (optname == SO_ATTACH_FILTER) | |
380 | return do_set_attach_filter(sock, level, optname, | |
381 | optval, optlen); | |
382 | if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) | |
383 | return do_set_sock_timeout(sock, level, optname, optval, optlen); | |
384 | ||
385 | return sock_setsockopt(sock, level, optname, optval, optlen); | |
386 | } | |
387 | ||
361d93c4 HC |
388 | COMPAT_SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
389 | char __user *, optval, unsigned int, optlen) | |
1da177e4 | 390 | { |
3fdadf7d | 391 | int err; |
c6d409cf | 392 | struct socket *sock = sockfd_lookup(fd, &err); |
3fdadf7d | 393 | |
c6d409cf ED |
394 | if (sock) { |
395 | err = security_socket_setsockopt(sock, level, optname); | |
3fdadf7d DM |
396 | if (err) { |
397 | sockfd_put(sock); | |
398 | return err; | |
399 | } | |
400 | ||
401 | if (level == SOL_SOCKET) | |
402 | err = compat_sock_setsockopt(sock, level, | |
403 | optname, optval, optlen); | |
404 | else if (sock->ops->compat_setsockopt) | |
405 | err = sock->ops->compat_setsockopt(sock, level, | |
406 | optname, optval, optlen); | |
407 | else | |
408 | err = sock->ops->setsockopt(sock, level, | |
409 | optname, optval, optlen); | |
410 | sockfd_put(sock); | |
411 | } | |
412 | return err; | |
1da177e4 LT |
413 | } |
414 | ||
3fdadf7d | 415 | static int do_get_sock_timeout(struct socket *sock, int level, int optname, |
1da177e4 LT |
416 | char __user *optval, int __user *optlen) |
417 | { | |
418 | struct compat_timeval __user *up; | |
419 | struct timeval ktime; | |
420 | mm_segment_t old_fs; | |
421 | int len, err; | |
422 | ||
423 | up = (struct compat_timeval __user *) optval; | |
424 | if (get_user(len, optlen)) | |
425 | return -EFAULT; | |
426 | if (len < sizeof(*up)) | |
427 | return -EINVAL; | |
428 | len = sizeof(ktime); | |
429 | old_fs = get_fs(); | |
430 | set_fs(KERNEL_DS); | |
3fdadf7d | 431 | err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len); |
1da177e4 LT |
432 | set_fs(old_fs); |
433 | ||
434 | if (!err) { | |
435 | if (put_user(sizeof(*up), optlen) || | |
436 | !access_ok(VERIFY_WRITE, up, sizeof(*up)) || | |
437 | __put_user(ktime.tv_sec, &up->tv_sec) || | |
438 | __put_user(ktime.tv_usec, &up->tv_usec)) | |
439 | err = -EFAULT; | |
440 | } | |
441 | return err; | |
442 | } | |
443 | ||
3fdadf7d | 444 | static int compat_sock_getsockopt(struct socket *sock, int level, int optname, |
1da177e4 LT |
445 | char __user *optval, int __user *optlen) |
446 | { | |
3fdadf7d DM |
447 | if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) |
448 | return do_get_sock_timeout(sock, level, optname, optval, optlen); | |
449 | return sock_getsockopt(sock, level, optname, optval, optlen); | |
1da177e4 LT |
450 | } |
451 | ||
f0ac2614 SP |
452 | int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp) |
453 | { | |
ee4fa23c L |
454 | struct compat_timeval __user *ctv; |
455 | int err; | |
b7aa0bf7 | 456 | struct timeval tv; |
f0ac2614 | 457 | |
ee4fa23c L |
458 | if (COMPAT_USE_64BIT_TIME) |
459 | return sock_get_timestamp(sk, userstamp); | |
460 | ||
461 | ctv = (struct compat_timeval __user *) userstamp; | |
462 | err = -ENOENT; | |
f0ac2614 | 463 | if (!sock_flag(sk, SOCK_TIMESTAMP)) |
20d49473 | 464 | sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
b7aa0bf7 ED |
465 | tv = ktime_to_timeval(sk->sk_stamp); |
466 | if (tv.tv_sec == -1) | |
f0ac2614 | 467 | return err; |
b7aa0bf7 ED |
468 | if (tv.tv_sec == 0) { |
469 | sk->sk_stamp = ktime_get_real(); | |
470 | tv = ktime_to_timeval(sk->sk_stamp); | |
471 | } | |
472 | err = 0; | |
473 | if (put_user(tv.tv_sec, &ctv->tv_sec) || | |
474 | put_user(tv.tv_usec, &ctv->tv_usec)) | |
f0ac2614 SP |
475 | err = -EFAULT; |
476 | return err; | |
477 | } | |
478 | EXPORT_SYMBOL(compat_sock_get_timestamp); | |
479 | ||
ae40eb1e ED |
480 | int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp) |
481 | { | |
ee4fa23c L |
482 | struct compat_timespec __user *ctv; |
483 | int err; | |
ae40eb1e ED |
484 | struct timespec ts; |
485 | ||
ee4fa23c L |
486 | if (COMPAT_USE_64BIT_TIME) |
487 | return sock_get_timestampns (sk, userstamp); | |
488 | ||
489 | ctv = (struct compat_timespec __user *) userstamp; | |
490 | err = -ENOENT; | |
ae40eb1e | 491 | if (!sock_flag(sk, SOCK_TIMESTAMP)) |
20d49473 | 492 | sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
ae40eb1e ED |
493 | ts = ktime_to_timespec(sk->sk_stamp); |
494 | if (ts.tv_sec == -1) | |
495 | return err; | |
496 | if (ts.tv_sec == 0) { | |
497 | sk->sk_stamp = ktime_get_real(); | |
498 | ts = ktime_to_timespec(sk->sk_stamp); | |
499 | } | |
500 | err = 0; | |
501 | if (put_user(ts.tv_sec, &ctv->tv_sec) || | |
502 | put_user(ts.tv_nsec, &ctv->tv_nsec)) | |
503 | err = -EFAULT; | |
504 | return err; | |
505 | } | |
506 | EXPORT_SYMBOL(compat_sock_get_timestampns); | |
507 | ||
361d93c4 HC |
508 | COMPAT_SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
509 | char __user *, optval, int __user *, optlen) | |
3fdadf7d DM |
510 | { |
511 | int err; | |
c6d409cf | 512 | struct socket *sock = sockfd_lookup(fd, &err); |
3fdadf7d | 513 | |
c6d409cf ED |
514 | if (sock) { |
515 | err = security_socket_getsockopt(sock, level, optname); | |
3fdadf7d DM |
516 | if (err) { |
517 | sockfd_put(sock); | |
518 | return err; | |
519 | } | |
520 | ||
521 | if (level == SOL_SOCKET) | |
522 | err = compat_sock_getsockopt(sock, level, | |
523 | optname, optval, optlen); | |
524 | else if (sock->ops->compat_getsockopt) | |
525 | err = sock->ops->compat_getsockopt(sock, level, | |
526 | optname, optval, optlen); | |
527 | else | |
528 | err = sock->ops->getsockopt(sock, level, | |
529 | optname, optval, optlen); | |
530 | sockfd_put(sock); | |
531 | } | |
532 | return err; | |
533 | } | |
dae50295 DS |
534 | |
535 | struct compat_group_req { | |
536 | __u32 gr_interface; | |
537 | struct __kernel_sockaddr_storage gr_group | |
538 | __attribute__ ((aligned(4))); | |
bc10502d | 539 | } __packed; |
dae50295 DS |
540 | |
541 | struct compat_group_source_req { | |
542 | __u32 gsr_interface; | |
543 | struct __kernel_sockaddr_storage gsr_group | |
544 | __attribute__ ((aligned(4))); | |
545 | struct __kernel_sockaddr_storage gsr_source | |
546 | __attribute__ ((aligned(4))); | |
bc10502d | 547 | } __packed; |
dae50295 DS |
548 | |
549 | struct compat_group_filter { | |
550 | __u32 gf_interface; | |
551 | struct __kernel_sockaddr_storage gf_group | |
552 | __attribute__ ((aligned(4))); | |
553 | __u32 gf_fmode; | |
554 | __u32 gf_numsrc; | |
555 | struct __kernel_sockaddr_storage gf_slist[1] | |
556 | __attribute__ ((aligned(4))); | |
bc10502d | 557 | } __packed; |
dae50295 | 558 | |
be666e0a DS |
559 | #define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \ |
560 | sizeof(struct __kernel_sockaddr_storage)) | |
561 | ||
dae50295 DS |
562 | |
563 | int compat_mc_setsockopt(struct sock *sock, int level, int optname, | |
b7058842 | 564 | char __user *optval, unsigned int optlen, |
c6d409cf | 565 | int (*setsockopt)(struct sock *, int, int, char __user *, unsigned int)) |
dae50295 DS |
566 | { |
567 | char __user *koptval = optval; | |
568 | int koptlen = optlen; | |
569 | ||
570 | switch (optname) { | |
571 | case MCAST_JOIN_GROUP: | |
572 | case MCAST_LEAVE_GROUP: | |
573 | { | |
574 | struct compat_group_req __user *gr32 = (void *)optval; | |
575 | struct group_req __user *kgr = | |
576 | compat_alloc_user_space(sizeof(struct group_req)); | |
577 | u32 interface; | |
578 | ||
579 | if (!access_ok(VERIFY_READ, gr32, sizeof(*gr32)) || | |
580 | !access_ok(VERIFY_WRITE, kgr, sizeof(struct group_req)) || | |
581 | __get_user(interface, &gr32->gr_interface) || | |
582 | __put_user(interface, &kgr->gr_interface) || | |
583 | copy_in_user(&kgr->gr_group, &gr32->gr_group, | |
584 | sizeof(kgr->gr_group))) | |
585 | return -EFAULT; | |
586 | koptval = (char __user *)kgr; | |
587 | koptlen = sizeof(struct group_req); | |
588 | break; | |
589 | } | |
590 | case MCAST_JOIN_SOURCE_GROUP: | |
591 | case MCAST_LEAVE_SOURCE_GROUP: | |
592 | case MCAST_BLOCK_SOURCE: | |
593 | case MCAST_UNBLOCK_SOURCE: | |
594 | { | |
595 | struct compat_group_source_req __user *gsr32 = (void *)optval; | |
be666e0a | 596 | struct group_source_req __user *kgsr = compat_alloc_user_space( |
dae50295 DS |
597 | sizeof(struct group_source_req)); |
598 | u32 interface; | |
599 | ||
600 | if (!access_ok(VERIFY_READ, gsr32, sizeof(*gsr32)) || | |
601 | !access_ok(VERIFY_WRITE, kgsr, | |
602 | sizeof(struct group_source_req)) || | |
603 | __get_user(interface, &gsr32->gsr_interface) || | |
604 | __put_user(interface, &kgsr->gsr_interface) || | |
605 | copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group, | |
606 | sizeof(kgsr->gsr_group)) || | |
607 | copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source, | |
608 | sizeof(kgsr->gsr_source))) | |
609 | return -EFAULT; | |
610 | koptval = (char __user *)kgsr; | |
611 | koptlen = sizeof(struct group_source_req); | |
612 | break; | |
613 | } | |
614 | case MCAST_MSFILTER: | |
615 | { | |
616 | struct compat_group_filter __user *gf32 = (void *)optval; | |
be666e0a | 617 | struct group_filter __user *kgf; |
dae50295 DS |
618 | u32 interface, fmode, numsrc; |
619 | ||
be666e0a | 620 | if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || |
dae50295 DS |
621 | __get_user(interface, &gf32->gf_interface) || |
622 | __get_user(fmode, &gf32->gf_fmode) || | |
623 | __get_user(numsrc, &gf32->gf_numsrc)) | |
624 | return -EFAULT; | |
625 | koptlen = optlen + sizeof(struct group_filter) - | |
626 | sizeof(struct compat_group_filter); | |
627 | if (koptlen < GROUP_FILTER_SIZE(numsrc)) | |
628 | return -EINVAL; | |
629 | kgf = compat_alloc_user_space(koptlen); | |
630 | if (!access_ok(VERIFY_WRITE, kgf, koptlen) || | |
631 | __put_user(interface, &kgf->gf_interface) || | |
632 | __put_user(fmode, &kgf->gf_fmode) || | |
633 | __put_user(numsrc, &kgf->gf_numsrc) || | |
634 | copy_in_user(&kgf->gf_group, &gf32->gf_group, | |
635 | sizeof(kgf->gf_group)) || | |
be666e0a | 636 | (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist, |
dae50295 DS |
637 | numsrc * sizeof(kgf->gf_slist[0])))) |
638 | return -EFAULT; | |
639 | koptval = (char __user *)kgf; | |
640 | break; | |
641 | } | |
642 | ||
643 | default: | |
644 | break; | |
645 | } | |
646 | return setsockopt(sock, level, optname, koptval, koptlen); | |
647 | } | |
dae50295 DS |
648 | EXPORT_SYMBOL(compat_mc_setsockopt); |
649 | ||
42908c69 DS |
650 | int compat_mc_getsockopt(struct sock *sock, int level, int optname, |
651 | char __user *optval, int __user *optlen, | |
c6d409cf | 652 | int (*getsockopt)(struct sock *, int, int, char __user *, int __user *)) |
42908c69 DS |
653 | { |
654 | struct compat_group_filter __user *gf32 = (void *)optval; | |
655 | struct group_filter __user *kgf; | |
656 | int __user *koptlen; | |
657 | u32 interface, fmode, numsrc; | |
658 | int klen, ulen, err; | |
659 | ||
660 | if (optname != MCAST_MSFILTER) | |
661 | return getsockopt(sock, level, optname, optval, optlen); | |
662 | ||
663 | koptlen = compat_alloc_user_space(sizeof(*koptlen)); | |
664 | if (!access_ok(VERIFY_READ, optlen, sizeof(*optlen)) || | |
665 | __get_user(ulen, optlen)) | |
666 | return -EFAULT; | |
667 | ||
668 | /* adjust len for pad */ | |
669 | klen = ulen + sizeof(*kgf) - sizeof(*gf32); | |
670 | ||
671 | if (klen < GROUP_FILTER_SIZE(0)) | |
672 | return -EINVAL; | |
673 | ||
674 | if (!access_ok(VERIFY_WRITE, koptlen, sizeof(*koptlen)) || | |
675 | __put_user(klen, koptlen)) | |
676 | return -EFAULT; | |
677 | ||
678 | /* have to allow space for previous compat_alloc_user_space, too */ | |
679 | kgf = compat_alloc_user_space(klen+sizeof(*optlen)); | |
680 | ||
681 | if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || | |
682 | __get_user(interface, &gf32->gf_interface) || | |
683 | __get_user(fmode, &gf32->gf_fmode) || | |
684 | __get_user(numsrc, &gf32->gf_numsrc) || | |
685 | __put_user(interface, &kgf->gf_interface) || | |
686 | __put_user(fmode, &kgf->gf_fmode) || | |
687 | __put_user(numsrc, &kgf->gf_numsrc) || | |
c6d409cf | 688 | copy_in_user(&kgf->gf_group, &gf32->gf_group, sizeof(kgf->gf_group))) |
42908c69 DS |
689 | return -EFAULT; |
690 | ||
691 | err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen); | |
692 | if (err) | |
693 | return err; | |
694 | ||
695 | if (!access_ok(VERIFY_READ, koptlen, sizeof(*koptlen)) || | |
696 | __get_user(klen, koptlen)) | |
697 | return -EFAULT; | |
698 | ||
699 | ulen = klen - (sizeof(*kgf)-sizeof(*gf32)); | |
700 | ||
701 | if (!access_ok(VERIFY_WRITE, optlen, sizeof(*optlen)) || | |
702 | __put_user(ulen, optlen)) | |
703 | return -EFAULT; | |
704 | ||
705 | if (!access_ok(VERIFY_READ, kgf, klen) || | |
706 | !access_ok(VERIFY_WRITE, gf32, ulen) || | |
707 | __get_user(interface, &kgf->gf_interface) || | |
708 | __get_user(fmode, &kgf->gf_fmode) || | |
709 | __get_user(numsrc, &kgf->gf_numsrc) || | |
710 | __put_user(interface, &gf32->gf_interface) || | |
711 | __put_user(fmode, &gf32->gf_fmode) || | |
712 | __put_user(numsrc, &gf32->gf_numsrc)) | |
713 | return -EFAULT; | |
714 | if (numsrc) { | |
715 | int copylen; | |
716 | ||
717 | klen -= GROUP_FILTER_SIZE(0); | |
718 | copylen = numsrc * sizeof(gf32->gf_slist[0]); | |
719 | if (copylen > klen) | |
720 | copylen = klen; | |
c6d409cf | 721 | if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen)) |
42908c69 DS |
722 | return -EFAULT; |
723 | } | |
724 | return err; | |
725 | } | |
42908c69 DS |
726 | EXPORT_SYMBOL(compat_mc_getsockopt); |
727 | ||
dae50295 | 728 | |
1da177e4 LT |
729 | /* Argument list sizes for compat_sys_socketcall */ |
730 | #define AL(x) ((x) * sizeof(u32)) | |
228e548e | 731 | static unsigned char nas[21] = { |
c6d409cf ED |
732 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
733 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), | |
734 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), | |
228e548e | 735 | AL(4), AL(5), AL(4) |
c6d409cf | 736 | }; |
1da177e4 LT |
737 | #undef AL |
738 | ||
361d93c4 | 739 | COMPAT_SYSCALL_DEFINE3(sendmsg, int, fd, struct compat_msghdr __user *, msg, unsigned int, flags) |
1da177e4 | 740 | { |
a7526eb5 AL |
741 | if (flags & MSG_CMSG_COMPAT) |
742 | return -EINVAL; | |
743 | return __sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); | |
1da177e4 LT |
744 | } |
745 | ||
361d93c4 HC |
746 | COMPAT_SYSCALL_DEFINE4(sendmmsg, int, fd, struct compat_mmsghdr __user *, mmsg, |
747 | unsigned int, vlen, unsigned int, flags) | |
228e548e | 748 | { |
a7526eb5 AL |
749 | if (flags & MSG_CMSG_COMPAT) |
750 | return -EINVAL; | |
228e548e AB |
751 | return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, |
752 | flags | MSG_CMSG_COMPAT); | |
753 | } | |
754 | ||
361d93c4 | 755 | COMPAT_SYSCALL_DEFINE3(recvmsg, int, fd, struct compat_msghdr __user *, msg, unsigned int, flags) |
1da177e4 | 756 | { |
a7526eb5 AL |
757 | if (flags & MSG_CMSG_COMPAT) |
758 | return -EINVAL; | |
759 | return __sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); | |
1da177e4 LT |
760 | } |
761 | ||
3a49a0f7 | 762 | COMPAT_SYSCALL_DEFINE4(recv, int, fd, void __user *, buf, compat_size_t, len, unsigned int, flags) |
1dacc76d JB |
763 | { |
764 | return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT); | |
765 | } | |
766 | ||
3a49a0f7 HC |
767 | COMPAT_SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, buf, compat_size_t, len, |
768 | unsigned int, flags, struct sockaddr __user *, addr, | |
769 | int __user *, addrlen) | |
1dacc76d JB |
770 | { |
771 | return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen); | |
772 | } | |
773 | ||
361d93c4 HC |
774 | COMPAT_SYSCALL_DEFINE5(recvmmsg, int, fd, struct compat_mmsghdr __user *, mmsg, |
775 | unsigned int, vlen, unsigned int, flags, | |
776 | struct compat_timespec __user *, timeout) | |
a2e27255 ACM |
777 | { |
778 | int datagrams; | |
779 | struct timespec ktspec; | |
a2e27255 | 780 | |
a7526eb5 AL |
781 | if (flags & MSG_CMSG_COMPAT) |
782 | return -EINVAL; | |
783 | ||
5b23136b JMG |
784 | if (timeout == NULL) |
785 | return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, | |
786 | flags | MSG_CMSG_COMPAT, NULL); | |
787 | ||
2def2ef2 | 788 | if (compat_get_timespec(&ktspec, timeout)) |
a2e27255 ACM |
789 | return -EFAULT; |
790 | ||
791 | datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, | |
792 | flags | MSG_CMSG_COMPAT, &ktspec); | |
2def2ef2 | 793 | if (datagrams > 0 && compat_put_timespec(&ktspec, timeout)) |
a2e27255 ACM |
794 | datagrams = -EFAULT; |
795 | ||
796 | return datagrams; | |
797 | } | |
798 | ||
361d93c4 | 799 | COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user *, args) |
1da177e4 LT |
800 | { |
801 | int ret; | |
802 | u32 a[6]; | |
803 | u32 a0, a1; | |
4768fbcb | 804 | |
228e548e | 805 | if (call < SYS_SOCKET || call > SYS_SENDMMSG) |
1da177e4 LT |
806 | return -EINVAL; |
807 | if (copy_from_user(a, args, nas[call])) | |
808 | return -EFAULT; | |
809 | a0 = a[0]; | |
810 | a1 = a[1]; | |
4768fbcb | 811 | |
e71a4783 | 812 | switch (call) { |
1da177e4 LT |
813 | case SYS_SOCKET: |
814 | ret = sys_socket(a0, a1, a[2]); | |
815 | break; | |
816 | case SYS_BIND: | |
817 | ret = sys_bind(a0, compat_ptr(a1), a[2]); | |
818 | break; | |
819 | case SYS_CONNECT: | |
820 | ret = sys_connect(a0, compat_ptr(a1), a[2]); | |
821 | break; | |
822 | case SYS_LISTEN: | |
823 | ret = sys_listen(a0, a1); | |
824 | break; | |
825 | case SYS_ACCEPT: | |
de11defe | 826 | ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0); |
1da177e4 LT |
827 | break; |
828 | case SYS_GETSOCKNAME: | |
829 | ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2])); | |
830 | break; | |
831 | case SYS_GETPEERNAME: | |
832 | ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2])); | |
833 | break; | |
834 | case SYS_SOCKETPAIR: | |
835 | ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3])); | |
836 | break; | |
837 | case SYS_SEND: | |
838 | ret = sys_send(a0, compat_ptr(a1), a[2], a[3]); | |
839 | break; | |
840 | case SYS_SENDTO: | |
841 | ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]); | |
842 | break; | |
843 | case SYS_RECV: | |
1dacc76d | 844 | ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]); |
1da177e4 LT |
845 | break; |
846 | case SYS_RECVFROM: | |
1dacc76d JB |
847 | ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], |
848 | compat_ptr(a[4]), compat_ptr(a[5])); | |
1da177e4 LT |
849 | break; |
850 | case SYS_SHUTDOWN: | |
c6d409cf | 851 | ret = sys_shutdown(a0, a1); |
1da177e4 LT |
852 | break; |
853 | case SYS_SETSOCKOPT: | |
854 | ret = compat_sys_setsockopt(a0, a1, a[2], | |
855 | compat_ptr(a[3]), a[4]); | |
856 | break; | |
857 | case SYS_GETSOCKOPT: | |
858 | ret = compat_sys_getsockopt(a0, a1, a[2], | |
859 | compat_ptr(a[3]), compat_ptr(a[4])); | |
860 | break; | |
861 | case SYS_SENDMSG: | |
862 | ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]); | |
863 | break; | |
228e548e AB |
864 | case SYS_SENDMMSG: |
865 | ret = compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]); | |
866 | break; | |
1da177e4 LT |
867 | case SYS_RECVMSG: |
868 | ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]); | |
869 | break; | |
a2e27255 ACM |
870 | case SYS_RECVMMSG: |
871 | ret = compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3], | |
872 | compat_ptr(a[4])); | |
873 | break; | |
de11defe UD |
874 | case SYS_ACCEPT4: |
875 | ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]); | |
aaca0bdc | 876 | break; |
1da177e4 LT |
877 | default: |
878 | ret = -EINVAL; | |
879 | break; | |
880 | } | |
881 | return ret; | |
882 | } |