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 DC |
74 | if (kmsg->msg_namelen > sizeof(struct sockaddr_storage)) |
75 | return -EINVAL; | |
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 | ||
e71a4783 | 88 | if (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 | } | |
96 | kern_msg->msg_name = kern_address; | |
97 | } else | |
98 | kern_msg->msg_name = NULL; | |
99 | ||
1da177e4 LT |
100 | tot_len = iov_from_user_compat_to_kern(kern_iov, |
101 | (struct compat_iovec __user *)kern_msg->msg_iov, | |
102 | kern_msg->msg_iovlen); | |
e71a4783 | 103 | if (tot_len >= 0) |
1da177e4 | 104 | kern_msg->msg_iov = kern_iov; |
1da177e4 LT |
105 | |
106 | return tot_len; | |
107 | } | |
108 | ||
109 | /* Bleech... */ | |
110 | #define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32)) | |
111 | ||
112 | #define CMSG_COMPAT_DATA(cmsg) \ | |
113 | ((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)))) | |
114 | #define CMSG_COMPAT_SPACE(len) \ | |
115 | (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len)) | |
116 | #define CMSG_COMPAT_LEN(len) \ | |
117 | (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len)) | |
118 | ||
119 | #define CMSG_COMPAT_FIRSTHDR(msg) \ | |
120 | (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \ | |
121 | (struct compat_cmsghdr __user *)((msg)->msg_control) : \ | |
122 | (struct compat_cmsghdr __user *)NULL) | |
123 | ||
124 | #define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \ | |
125 | ((ucmlen) >= sizeof(struct compat_cmsghdr) && \ | |
126 | (ucmlen) <= (unsigned long) \ | |
127 | ((mhdr)->msg_controllen - \ | |
128 | ((char *)(ucmsg) - (char *)(mhdr)->msg_control))) | |
129 | ||
130 | static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg, | |
131 | struct compat_cmsghdr __user *cmsg, int cmsg_len) | |
132 | { | |
133 | char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len); | |
134 | if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) > | |
135 | msg->msg_controllen) | |
136 | return NULL; | |
137 | return (struct compat_cmsghdr __user *)ptr; | |
138 | } | |
139 | ||
140 | /* There is a lot of hair here because the alignment rules (and | |
141 | * thus placement) of cmsg headers and length are different for | |
142 | * 32-bit apps. -DaveM | |
143 | */ | |
8920e8f9 | 144 | int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk, |
1da177e4 LT |
145 | unsigned char *stackbuf, int stackbuf_size) |
146 | { | |
147 | struct compat_cmsghdr __user *ucmsg; | |
148 | struct cmsghdr *kcmsg, *kcmsg_base; | |
149 | compat_size_t ucmlen; | |
150 | __kernel_size_t kcmlen, tmp; | |
8920e8f9 | 151 | int err = -EFAULT; |
1da177e4 LT |
152 | |
153 | kcmlen = 0; | |
154 | kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf; | |
155 | ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); | |
e71a4783 SH |
156 | while (ucmsg != NULL) { |
157 | if (get_user(ucmlen, &ucmsg->cmsg_len)) | |
1da177e4 LT |
158 | return -EFAULT; |
159 | ||
160 | /* Catch bogons. */ | |
161 | if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) | |
162 | return -EINVAL; | |
163 | ||
164 | tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + | |
165 | CMSG_ALIGN(sizeof(struct cmsghdr))); | |
8920e8f9 | 166 | tmp = CMSG_ALIGN(tmp); |
1da177e4 LT |
167 | kcmlen += tmp; |
168 | ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); | |
169 | } | |
e71a4783 | 170 | if (kcmlen == 0) |
1da177e4 LT |
171 | return -EINVAL; |
172 | ||
173 | /* The kcmlen holds the 64-bit version of the control length. | |
174 | * It may not be modified as we do not stick it into the kmsg | |
175 | * until we have successfully copied over all of the data | |
176 | * from the user. | |
177 | */ | |
8920e8f9 AV |
178 | if (kcmlen > stackbuf_size) |
179 | kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL); | |
180 | if (kcmsg == NULL) | |
1da177e4 LT |
181 | return -ENOBUFS; |
182 | ||
183 | /* Now copy them over neatly. */ | |
184 | memset(kcmsg, 0, kcmlen); | |
185 | ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); | |
e71a4783 | 186 | while (ucmsg != NULL) { |
8920e8f9 AV |
187 | if (__get_user(ucmlen, &ucmsg->cmsg_len)) |
188 | goto Efault; | |
189 | if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) | |
190 | goto Einval; | |
1da177e4 LT |
191 | tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + |
192 | CMSG_ALIGN(sizeof(struct cmsghdr))); | |
8920e8f9 AV |
193 | if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp)) |
194 | goto Einval; | |
1da177e4 | 195 | kcmsg->cmsg_len = tmp; |
8920e8f9 AV |
196 | tmp = CMSG_ALIGN(tmp); |
197 | if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) || | |
198 | __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) || | |
199 | copy_from_user(CMSG_DATA(kcmsg), | |
200 | CMSG_COMPAT_DATA(ucmsg), | |
201 | (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))))) | |
202 | goto Efault; | |
1da177e4 LT |
203 | |
204 | /* Advance. */ | |
8920e8f9 | 205 | kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp); |
1da177e4 LT |
206 | ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); |
207 | } | |
208 | ||
209 | /* Ok, looks like we made it. Hook it up and return success. */ | |
210 | kmsg->msg_control = kcmsg_base; | |
211 | kmsg->msg_controllen = kcmlen; | |
212 | return 0; | |
213 | ||
8920e8f9 AV |
214 | Einval: |
215 | err = -EINVAL; | |
216 | Efault: | |
217 | if (kcmsg_base != (struct cmsghdr *)stackbuf) | |
218 | sock_kfree_s(sk, kcmsg_base, kcmlen); | |
219 | return err; | |
1da177e4 LT |
220 | } |
221 | ||
222 | int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data) | |
223 | { | |
1da177e4 LT |
224 | struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; |
225 | struct compat_cmsghdr cmhdr; | |
81881047 JJ |
226 | struct compat_timeval ctv; |
227 | struct compat_timespec cts[3]; | |
1da177e4 LT |
228 | int cmlen; |
229 | ||
e71a4783 | 230 | if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) { |
1da177e4 LT |
231 | kmsg->msg_flags |= MSG_CTRUNC; |
232 | return 0; /* XXX: return error? check spec. */ | |
233 | } | |
234 | ||
ee4fa23c | 235 | if (!COMPAT_USE_64BIT_TIME) { |
ee4fa23c L |
236 | if (level == SOL_SOCKET && type == SCM_TIMESTAMP) { |
237 | struct timeval *tv = (struct timeval *)data; | |
238 | ctv.tv_sec = tv->tv_sec; | |
239 | ctv.tv_usec = tv->tv_usec; | |
240 | data = &ctv; | |
241 | len = sizeof(ctv); | |
242 | } | |
243 | if (level == SOL_SOCKET && | |
244 | (type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) { | |
245 | int count = type == SCM_TIMESTAMPNS ? 1 : 3; | |
246 | int i; | |
247 | struct timespec *ts = (struct timespec *)data; | |
248 | for (i = 0; i < count; i++) { | |
249 | cts[i].tv_sec = ts[i].tv_sec; | |
250 | cts[i].tv_nsec = ts[i].tv_nsec; | |
251 | } | |
252 | data = &cts; | |
253 | len = sizeof(cts[0]) * count; | |
20d49473 | 254 | } |
4768fbcb YH |
255 | } |
256 | ||
1da177e4 | 257 | cmlen = CMSG_COMPAT_LEN(len); |
e71a4783 | 258 | if (kmsg->msg_controllen < cmlen) { |
1da177e4 LT |
259 | kmsg->msg_flags |= MSG_CTRUNC; |
260 | cmlen = kmsg->msg_controllen; | |
261 | } | |
262 | cmhdr.cmsg_level = level; | |
263 | cmhdr.cmsg_type = type; | |
264 | cmhdr.cmsg_len = cmlen; | |
265 | ||
e71a4783 | 266 | if (copy_to_user(cm, &cmhdr, sizeof cmhdr)) |
1da177e4 | 267 | return -EFAULT; |
e71a4783 | 268 | if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr))) |
1da177e4 LT |
269 | return -EFAULT; |
270 | cmlen = CMSG_COMPAT_SPACE(len); | |
1ac70e7a WY |
271 | if (kmsg->msg_controllen < cmlen) |
272 | cmlen = kmsg->msg_controllen; | |
1da177e4 LT |
273 | kmsg->msg_control += cmlen; |
274 | kmsg->msg_controllen -= cmlen; | |
275 | return 0; | |
276 | } | |
277 | ||
278 | void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm) | |
279 | { | |
280 | struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; | |
281 | int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int); | |
282 | int fdnum = scm->fp->count; | |
283 | struct file **fp = scm->fp->fp; | |
284 | int __user *cmfptr; | |
285 | int err = 0, i; | |
286 | ||
287 | if (fdnum < fdmax) | |
288 | fdmax = fdnum; | |
289 | ||
290 | for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) { | |
291 | int new_fd; | |
292 | err = security_file_receive(fp[i]); | |
293 | if (err) | |
294 | break; | |
4a19542e UD |
295 | err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags |
296 | ? O_CLOEXEC : 0); | |
1da177e4 LT |
297 | if (err < 0) |
298 | break; | |
299 | new_fd = err; | |
300 | err = put_user(new_fd, cmfptr); | |
301 | if (err) { | |
302 | put_unused_fd(new_fd); | |
303 | break; | |
304 | } | |
305 | /* Bump the usage count and install the file. */ | |
cb0942b8 | 306 | fd_install(new_fd, get_file(fp[i])); |
1da177e4 LT |
307 | } |
308 | ||
309 | if (i > 0) { | |
310 | int cmlen = CMSG_COMPAT_LEN(i * sizeof(int)); | |
effee6a0 | 311 | err = put_user(SOL_SOCKET, &cm->cmsg_level); |
1da177e4 LT |
312 | if (!err) |
313 | err = put_user(SCM_RIGHTS, &cm->cmsg_type); | |
314 | if (!err) | |
315 | err = put_user(cmlen, &cm->cmsg_len); | |
316 | if (!err) { | |
317 | cmlen = CMSG_COMPAT_SPACE(i * sizeof(int)); | |
318 | kmsg->msg_control += cmlen; | |
319 | kmsg->msg_controllen -= cmlen; | |
320 | } | |
321 | } | |
322 | if (i < fdnum) | |
323 | kmsg->msg_flags |= MSG_CTRUNC; | |
324 | ||
325 | /* | |
326 | * All of the files that fit in the message have had their | |
327 | * usage counts incremented, so we just free the list. | |
328 | */ | |
329 | __scm_destroy(scm); | |
330 | } | |
331 | ||
3fdadf7d | 332 | static int do_set_attach_filter(struct socket *sock, int level, int optname, |
b7058842 | 333 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
334 | { |
335 | struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval; | |
4768fbcb | 336 | struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog)); |
1da177e4 LT |
337 | compat_uptr_t ptr; |
338 | u16 len; | |
339 | ||
340 | if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) || | |
341 | !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) || | |
342 | __get_user(len, &fprog32->len) || | |
343 | __get_user(ptr, &fprog32->filter) || | |
344 | __put_user(len, &kfprog->len) || | |
345 | __put_user(compat_ptr(ptr), &kfprog->filter)) | |
346 | return -EFAULT; | |
347 | ||
3fdadf7d | 348 | return sock_setsockopt(sock, level, optname, (char __user *)kfprog, |
1da177e4 LT |
349 | sizeof(struct sock_fprog)); |
350 | } | |
351 | ||
3fdadf7d | 352 | static int do_set_sock_timeout(struct socket *sock, int level, |
b7058842 | 353 | int optname, char __user *optval, unsigned int optlen) |
1da177e4 | 354 | { |
c6d409cf | 355 | struct compat_timeval __user *up = (struct compat_timeval __user *)optval; |
1da177e4 LT |
356 | struct timeval ktime; |
357 | mm_segment_t old_fs; | |
358 | int err; | |
359 | ||
360 | if (optlen < sizeof(*up)) | |
361 | return -EINVAL; | |
362 | if (!access_ok(VERIFY_READ, up, sizeof(*up)) || | |
363 | __get_user(ktime.tv_sec, &up->tv_sec) || | |
364 | __get_user(ktime.tv_usec, &up->tv_usec)) | |
365 | return -EFAULT; | |
366 | old_fs = get_fs(); | |
367 | set_fs(KERNEL_DS); | |
c6d409cf | 368 | err = sock_setsockopt(sock, level, optname, (char *)&ktime, sizeof(ktime)); |
1da177e4 LT |
369 | set_fs(old_fs); |
370 | ||
371 | return err; | |
372 | } | |
373 | ||
3fdadf7d | 374 | static int compat_sock_setsockopt(struct socket *sock, int level, int optname, |
b7058842 | 375 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
376 | { |
377 | if (optname == SO_ATTACH_FILTER) | |
378 | return do_set_attach_filter(sock, level, optname, | |
379 | optval, optlen); | |
380 | if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) | |
381 | return do_set_sock_timeout(sock, level, optname, optval, optlen); | |
382 | ||
383 | return sock_setsockopt(sock, level, optname, optval, optlen); | |
384 | } | |
385 | ||
1da177e4 | 386 | asmlinkage long compat_sys_setsockopt(int fd, int level, int optname, |
b7058842 | 387 | char __user *optval, unsigned int optlen) |
1da177e4 | 388 | { |
3fdadf7d | 389 | int err; |
c6d409cf | 390 | struct socket *sock = sockfd_lookup(fd, &err); |
3fdadf7d | 391 | |
c6d409cf ED |
392 | if (sock) { |
393 | err = security_socket_setsockopt(sock, level, optname); | |
3fdadf7d DM |
394 | if (err) { |
395 | sockfd_put(sock); | |
396 | return err; | |
397 | } | |
398 | ||
399 | if (level == SOL_SOCKET) | |
400 | err = compat_sock_setsockopt(sock, level, | |
401 | optname, optval, optlen); | |
402 | else if (sock->ops->compat_setsockopt) | |
403 | err = sock->ops->compat_setsockopt(sock, level, | |
404 | optname, optval, optlen); | |
405 | else | |
406 | err = sock->ops->setsockopt(sock, level, | |
407 | optname, optval, optlen); | |
408 | sockfd_put(sock); | |
409 | } | |
410 | return err; | |
1da177e4 LT |
411 | } |
412 | ||
3fdadf7d | 413 | static int do_get_sock_timeout(struct socket *sock, int level, int optname, |
1da177e4 LT |
414 | char __user *optval, int __user *optlen) |
415 | { | |
416 | struct compat_timeval __user *up; | |
417 | struct timeval ktime; | |
418 | mm_segment_t old_fs; | |
419 | int len, err; | |
420 | ||
421 | up = (struct compat_timeval __user *) optval; | |
422 | if (get_user(len, optlen)) | |
423 | return -EFAULT; | |
424 | if (len < sizeof(*up)) | |
425 | return -EINVAL; | |
426 | len = sizeof(ktime); | |
427 | old_fs = get_fs(); | |
428 | set_fs(KERNEL_DS); | |
3fdadf7d | 429 | err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len); |
1da177e4 LT |
430 | set_fs(old_fs); |
431 | ||
432 | if (!err) { | |
433 | if (put_user(sizeof(*up), optlen) || | |
434 | !access_ok(VERIFY_WRITE, up, sizeof(*up)) || | |
435 | __put_user(ktime.tv_sec, &up->tv_sec) || | |
436 | __put_user(ktime.tv_usec, &up->tv_usec)) | |
437 | err = -EFAULT; | |
438 | } | |
439 | return err; | |
440 | } | |
441 | ||
3fdadf7d | 442 | static int compat_sock_getsockopt(struct socket *sock, int level, int optname, |
1da177e4 LT |
443 | char __user *optval, int __user *optlen) |
444 | { | |
3fdadf7d DM |
445 | if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) |
446 | return do_get_sock_timeout(sock, level, optname, optval, optlen); | |
447 | return sock_getsockopt(sock, level, optname, optval, optlen); | |
1da177e4 LT |
448 | } |
449 | ||
f0ac2614 SP |
450 | int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp) |
451 | { | |
ee4fa23c L |
452 | struct compat_timeval __user *ctv; |
453 | int err; | |
b7aa0bf7 | 454 | struct timeval tv; |
f0ac2614 | 455 | |
ee4fa23c L |
456 | if (COMPAT_USE_64BIT_TIME) |
457 | return sock_get_timestamp(sk, userstamp); | |
458 | ||
459 | ctv = (struct compat_timeval __user *) userstamp; | |
460 | err = -ENOENT; | |
f0ac2614 | 461 | if (!sock_flag(sk, SOCK_TIMESTAMP)) |
20d49473 | 462 | sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
b7aa0bf7 ED |
463 | tv = ktime_to_timeval(sk->sk_stamp); |
464 | if (tv.tv_sec == -1) | |
f0ac2614 | 465 | return err; |
b7aa0bf7 ED |
466 | if (tv.tv_sec == 0) { |
467 | sk->sk_stamp = ktime_get_real(); | |
468 | tv = ktime_to_timeval(sk->sk_stamp); | |
469 | } | |
470 | err = 0; | |
471 | if (put_user(tv.tv_sec, &ctv->tv_sec) || | |
472 | put_user(tv.tv_usec, &ctv->tv_usec)) | |
f0ac2614 SP |
473 | err = -EFAULT; |
474 | return err; | |
475 | } | |
476 | EXPORT_SYMBOL(compat_sock_get_timestamp); | |
477 | ||
ae40eb1e ED |
478 | int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp) |
479 | { | |
ee4fa23c L |
480 | struct compat_timespec __user *ctv; |
481 | int err; | |
ae40eb1e ED |
482 | struct timespec ts; |
483 | ||
ee4fa23c L |
484 | if (COMPAT_USE_64BIT_TIME) |
485 | return sock_get_timestampns (sk, userstamp); | |
486 | ||
487 | ctv = (struct compat_timespec __user *) userstamp; | |
488 | err = -ENOENT; | |
ae40eb1e | 489 | if (!sock_flag(sk, SOCK_TIMESTAMP)) |
20d49473 | 490 | sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
ae40eb1e ED |
491 | ts = ktime_to_timespec(sk->sk_stamp); |
492 | if (ts.tv_sec == -1) | |
493 | return err; | |
494 | if (ts.tv_sec == 0) { | |
495 | sk->sk_stamp = ktime_get_real(); | |
496 | ts = ktime_to_timespec(sk->sk_stamp); | |
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 | } | |
504 | EXPORT_SYMBOL(compat_sock_get_timestampns); | |
505 | ||
3fdadf7d DM |
506 | asmlinkage long compat_sys_getsockopt(int fd, int level, int optname, |
507 | char __user *optval, int __user *optlen) | |
508 | { | |
509 | int err; | |
c6d409cf | 510 | struct socket *sock = sockfd_lookup(fd, &err); |
3fdadf7d | 511 | |
c6d409cf ED |
512 | if (sock) { |
513 | err = security_socket_getsockopt(sock, level, optname); | |
3fdadf7d DM |
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 | } | |
dae50295 DS |
532 | |
533 | struct compat_group_req { | |
534 | __u32 gr_interface; | |
535 | struct __kernel_sockaddr_storage gr_group | |
536 | __attribute__ ((aligned(4))); | |
bc10502d | 537 | } __packed; |
dae50295 DS |
538 | |
539 | struct compat_group_source_req { | |
540 | __u32 gsr_interface; | |
541 | struct __kernel_sockaddr_storage gsr_group | |
542 | __attribute__ ((aligned(4))); | |
543 | struct __kernel_sockaddr_storage gsr_source | |
544 | __attribute__ ((aligned(4))); | |
bc10502d | 545 | } __packed; |
dae50295 DS |
546 | |
547 | struct compat_group_filter { | |
548 | __u32 gf_interface; | |
549 | struct __kernel_sockaddr_storage gf_group | |
550 | __attribute__ ((aligned(4))); | |
551 | __u32 gf_fmode; | |
552 | __u32 gf_numsrc; | |
553 | struct __kernel_sockaddr_storage gf_slist[1] | |
554 | __attribute__ ((aligned(4))); | |
bc10502d | 555 | } __packed; |
dae50295 | 556 | |
be666e0a DS |
557 | #define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \ |
558 | sizeof(struct __kernel_sockaddr_storage)) | |
559 | ||
dae50295 DS |
560 | |
561 | int compat_mc_setsockopt(struct sock *sock, int level, int optname, | |
b7058842 | 562 | char __user *optval, unsigned int optlen, |
c6d409cf | 563 | int (*setsockopt)(struct sock *, int, int, char __user *, unsigned int)) |
dae50295 DS |
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; | |
be666e0a | 594 | struct group_source_req __user *kgsr = compat_alloc_user_space( |
dae50295 DS |
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; | |
be666e0a | 615 | struct group_filter __user *kgf; |
dae50295 DS |
616 | u32 interface, fmode, numsrc; |
617 | ||
be666e0a | 618 | if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || |
dae50295 DS |
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)) || | |
be666e0a | 634 | (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist, |
dae50295 DS |
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 | } | |
dae50295 DS |
646 | EXPORT_SYMBOL(compat_mc_setsockopt); |
647 | ||
42908c69 DS |
648 | int compat_mc_getsockopt(struct sock *sock, int level, int optname, |
649 | char __user *optval, int __user *optlen, | |
c6d409cf | 650 | int (*getsockopt)(struct sock *, int, int, char __user *, int __user *)) |
42908c69 DS |
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) || | |
c6d409cf | 686 | copy_in_user(&kgf->gf_group, &gf32->gf_group, sizeof(kgf->gf_group))) |
42908c69 DS |
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; | |
c6d409cf | 719 | if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen)) |
42908c69 DS |
720 | return -EFAULT; |
721 | } | |
722 | return err; | |
723 | } | |
42908c69 DS |
724 | EXPORT_SYMBOL(compat_mc_getsockopt); |
725 | ||
dae50295 | 726 | |
1da177e4 LT |
727 | /* Argument list sizes for compat_sys_socketcall */ |
728 | #define AL(x) ((x) * sizeof(u32)) | |
228e548e | 729 | static unsigned char nas[21] = { |
c6d409cf ED |
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), | |
228e548e | 733 | AL(4), AL(5), AL(4) |
c6d409cf | 734 | }; |
1da177e4 LT |
735 | #undef AL |
736 | ||
95c96174 | 737 | asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags) |
1da177e4 | 738 | { |
a7526eb5 AL |
739 | if (flags & MSG_CMSG_COMPAT) |
740 | return -EINVAL; | |
741 | return __sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); | |
1da177e4 LT |
742 | } |
743 | ||
228e548e | 744 | asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, |
95c96174 | 745 | unsigned int vlen, unsigned int flags) |
228e548e | 746 | { |
a7526eb5 AL |
747 | if (flags & MSG_CMSG_COMPAT) |
748 | return -EINVAL; | |
228e548e AB |
749 | return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, |
750 | flags | MSG_CMSG_COMPAT); | |
751 | } | |
752 | ||
1da177e4 LT |
753 | asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags) |
754 | { | |
a7526eb5 AL |
755 | if (flags & MSG_CMSG_COMPAT) |
756 | return -EINVAL; | |
757 | return __sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); | |
1da177e4 LT |
758 | } |
759 | ||
95c96174 | 760 | asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len, unsigned int flags) |
1dacc76d JB |
761 | { |
762 | return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT); | |
763 | } | |
764 | ||
765 | asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, size_t len, | |
95c96174 | 766 | unsigned int flags, struct sockaddr __user *addr, |
1dacc76d JB |
767 | int __user *addrlen) |
768 | { | |
769 | return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen); | |
770 | } | |
771 | ||
a2e27255 | 772 | asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg, |
95c96174 | 773 | unsigned int vlen, unsigned int flags, |
60c2ffd3 | 774 | struct compat_timespec __user *timeout) |
a2e27255 ACM |
775 | { |
776 | int datagrams; | |
777 | struct timespec ktspec; | |
a2e27255 | 778 | |
a7526eb5 AL |
779 | if (flags & MSG_CMSG_COMPAT) |
780 | return -EINVAL; | |
781 | ||
ee4fa23c L |
782 | if (COMPAT_USE_64BIT_TIME) |
783 | return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, | |
784 | flags | MSG_CMSG_COMPAT, | |
785 | (struct timespec *) timeout); | |
786 | ||
5b23136b JMG |
787 | if (timeout == NULL) |
788 | return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, | |
789 | flags | MSG_CMSG_COMPAT, NULL); | |
790 | ||
de039f02 | 791 | if (get_compat_timespec(&ktspec, timeout)) |
a2e27255 ACM |
792 | return -EFAULT; |
793 | ||
794 | datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, | |
795 | flags | MSG_CMSG_COMPAT, &ktspec); | |
de039f02 | 796 | if (datagrams > 0 && put_compat_timespec(&ktspec, timeout)) |
a2e27255 ACM |
797 | datagrams = -EFAULT; |
798 | ||
799 | return datagrams; | |
800 | } | |
801 | ||
1da177e4 LT |
802 | asmlinkage long compat_sys_socketcall(int call, u32 __user *args) |
803 | { | |
804 | int ret; | |
805 | u32 a[6]; | |
806 | u32 a0, a1; | |
4768fbcb | 807 | |
228e548e | 808 | if (call < SYS_SOCKET || call > SYS_SENDMMSG) |
1da177e4 LT |
809 | return -EINVAL; |
810 | if (copy_from_user(a, args, nas[call])) | |
811 | return -EFAULT; | |
812 | a0 = a[0]; | |
813 | a1 = a[1]; | |
4768fbcb | 814 | |
e71a4783 | 815 | switch (call) { |
1da177e4 LT |
816 | case SYS_SOCKET: |
817 | ret = sys_socket(a0, a1, a[2]); | |
818 | break; | |
819 | case SYS_BIND: | |
820 | ret = sys_bind(a0, compat_ptr(a1), a[2]); | |
821 | break; | |
822 | case SYS_CONNECT: | |
823 | ret = sys_connect(a0, compat_ptr(a1), a[2]); | |
824 | break; | |
825 | case SYS_LISTEN: | |
826 | ret = sys_listen(a0, a1); | |
827 | break; | |
828 | case SYS_ACCEPT: | |
de11defe | 829 | ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0); |
1da177e4 LT |
830 | break; |
831 | case SYS_GETSOCKNAME: | |
832 | ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2])); | |
833 | break; | |
834 | case SYS_GETPEERNAME: | |
835 | ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2])); | |
836 | break; | |
837 | case SYS_SOCKETPAIR: | |
838 | ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3])); | |
839 | break; | |
840 | case SYS_SEND: | |
841 | ret = sys_send(a0, compat_ptr(a1), a[2], a[3]); | |
842 | break; | |
843 | case SYS_SENDTO: | |
844 | ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]); | |
845 | break; | |
846 | case SYS_RECV: | |
1dacc76d | 847 | ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]); |
1da177e4 LT |
848 | break; |
849 | case SYS_RECVFROM: | |
1dacc76d JB |
850 | ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], |
851 | compat_ptr(a[4]), compat_ptr(a[5])); | |
1da177e4 LT |
852 | break; |
853 | case SYS_SHUTDOWN: | |
c6d409cf | 854 | ret = sys_shutdown(a0, a1); |
1da177e4 LT |
855 | break; |
856 | case SYS_SETSOCKOPT: | |
857 | ret = compat_sys_setsockopt(a0, a1, a[2], | |
858 | compat_ptr(a[3]), a[4]); | |
859 | break; | |
860 | case SYS_GETSOCKOPT: | |
861 | ret = compat_sys_getsockopt(a0, a1, a[2], | |
862 | compat_ptr(a[3]), compat_ptr(a[4])); | |
863 | break; | |
864 | case SYS_SENDMSG: | |
865 | ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]); | |
866 | break; | |
228e548e AB |
867 | case SYS_SENDMMSG: |
868 | ret = compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]); | |
869 | break; | |
1da177e4 LT |
870 | case SYS_RECVMSG: |
871 | ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]); | |
872 | break; | |
a2e27255 ACM |
873 | case SYS_RECVMMSG: |
874 | ret = compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3], | |
875 | compat_ptr(a[4])); | |
876 | break; | |
de11defe UD |
877 | case SYS_ACCEPT4: |
878 | ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]); | |
aaca0bdc | 879 | break; |
1da177e4 LT |
880 | default: |
881 | ret = -EINVAL; | |
882 | break; | |
883 | } | |
884 | return ret; | |
885 | } |