]>
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; | |
74 | kmsg->msg_name = compat_ptr(tmp1); | |
75 | kmsg->msg_iov = compat_ptr(tmp2); | |
76 | kmsg->msg_control = compat_ptr(tmp3); | |
77 | return 0; | |
78 | } | |
79 | ||
80 | /* I've named the args so it is easy to tell whose space the pointers are in. */ | |
81 | int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov, | |
230b1839 | 82 | struct sockaddr *kern_address, int mode) |
1da177e4 LT |
83 | { |
84 | int tot_len; | |
85 | ||
e71a4783 | 86 | if (kern_msg->msg_namelen) { |
c6d409cf | 87 | if (mode == VERIFY_READ) { |
1da177e4 LT |
88 | int err = move_addr_to_kernel(kern_msg->msg_name, |
89 | kern_msg->msg_namelen, | |
90 | kern_address); | |
e71a4783 | 91 | if (err < 0) |
1da177e4 LT |
92 | return err; |
93 | } | |
94 | kern_msg->msg_name = kern_address; | |
95 | } else | |
96 | kern_msg->msg_name = NULL; | |
97 | ||
1da177e4 LT |
98 | tot_len = iov_from_user_compat_to_kern(kern_iov, |
99 | (struct compat_iovec __user *)kern_msg->msg_iov, | |
100 | kern_msg->msg_iovlen); | |
e71a4783 | 101 | if (tot_len >= 0) |
1da177e4 | 102 | kern_msg->msg_iov = kern_iov; |
1da177e4 LT |
103 | |
104 | return tot_len; | |
105 | } | |
106 | ||
107 | /* Bleech... */ | |
108 | #define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32)) | |
109 | ||
110 | #define CMSG_COMPAT_DATA(cmsg) \ | |
111 | ((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)))) | |
112 | #define CMSG_COMPAT_SPACE(len) \ | |
113 | (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len)) | |
114 | #define CMSG_COMPAT_LEN(len) \ | |
115 | (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len)) | |
116 | ||
117 | #define CMSG_COMPAT_FIRSTHDR(msg) \ | |
118 | (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \ | |
119 | (struct compat_cmsghdr __user *)((msg)->msg_control) : \ | |
120 | (struct compat_cmsghdr __user *)NULL) | |
121 | ||
122 | #define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \ | |
123 | ((ucmlen) >= sizeof(struct compat_cmsghdr) && \ | |
124 | (ucmlen) <= (unsigned long) \ | |
125 | ((mhdr)->msg_controllen - \ | |
126 | ((char *)(ucmsg) - (char *)(mhdr)->msg_control))) | |
127 | ||
128 | static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg, | |
129 | struct compat_cmsghdr __user *cmsg, int cmsg_len) | |
130 | { | |
131 | char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len); | |
132 | if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) > | |
133 | msg->msg_controllen) | |
134 | return NULL; | |
135 | return (struct compat_cmsghdr __user *)ptr; | |
136 | } | |
137 | ||
138 | /* There is a lot of hair here because the alignment rules (and | |
139 | * thus placement) of cmsg headers and length are different for | |
140 | * 32-bit apps. -DaveM | |
141 | */ | |
8920e8f9 | 142 | int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk, |
1da177e4 LT |
143 | unsigned char *stackbuf, int stackbuf_size) |
144 | { | |
145 | struct compat_cmsghdr __user *ucmsg; | |
146 | struct cmsghdr *kcmsg, *kcmsg_base; | |
147 | compat_size_t ucmlen; | |
148 | __kernel_size_t kcmlen, tmp; | |
8920e8f9 | 149 | int err = -EFAULT; |
1da177e4 LT |
150 | |
151 | kcmlen = 0; | |
152 | kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf; | |
153 | ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); | |
e71a4783 SH |
154 | while (ucmsg != NULL) { |
155 | if (get_user(ucmlen, &ucmsg->cmsg_len)) | |
1da177e4 LT |
156 | return -EFAULT; |
157 | ||
158 | /* Catch bogons. */ | |
159 | if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) | |
160 | return -EINVAL; | |
161 | ||
162 | tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + | |
163 | CMSG_ALIGN(sizeof(struct cmsghdr))); | |
8920e8f9 | 164 | tmp = CMSG_ALIGN(tmp); |
1da177e4 LT |
165 | kcmlen += tmp; |
166 | ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); | |
167 | } | |
e71a4783 | 168 | if (kcmlen == 0) |
1da177e4 LT |
169 | return -EINVAL; |
170 | ||
171 | /* The kcmlen holds the 64-bit version of the control length. | |
172 | * It may not be modified as we do not stick it into the kmsg | |
173 | * until we have successfully copied over all of the data | |
174 | * from the user. | |
175 | */ | |
8920e8f9 AV |
176 | if (kcmlen > stackbuf_size) |
177 | kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL); | |
178 | if (kcmsg == NULL) | |
1da177e4 LT |
179 | return -ENOBUFS; |
180 | ||
181 | /* Now copy them over neatly. */ | |
182 | memset(kcmsg, 0, kcmlen); | |
183 | ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); | |
e71a4783 | 184 | while (ucmsg != NULL) { |
8920e8f9 AV |
185 | if (__get_user(ucmlen, &ucmsg->cmsg_len)) |
186 | goto Efault; | |
187 | if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) | |
188 | goto Einval; | |
1da177e4 LT |
189 | tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + |
190 | CMSG_ALIGN(sizeof(struct cmsghdr))); | |
8920e8f9 AV |
191 | if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp)) |
192 | goto Einval; | |
1da177e4 | 193 | kcmsg->cmsg_len = tmp; |
8920e8f9 AV |
194 | tmp = CMSG_ALIGN(tmp); |
195 | if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) || | |
196 | __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) || | |
197 | copy_from_user(CMSG_DATA(kcmsg), | |
198 | CMSG_COMPAT_DATA(ucmsg), | |
199 | (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))))) | |
200 | goto Efault; | |
1da177e4 LT |
201 | |
202 | /* Advance. */ | |
8920e8f9 | 203 | kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp); |
1da177e4 LT |
204 | ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); |
205 | } | |
206 | ||
207 | /* Ok, looks like we made it. Hook it up and return success. */ | |
208 | kmsg->msg_control = kcmsg_base; | |
209 | kmsg->msg_controllen = kcmlen; | |
210 | return 0; | |
211 | ||
8920e8f9 AV |
212 | Einval: |
213 | err = -EINVAL; | |
214 | Efault: | |
215 | if (kcmsg_base != (struct cmsghdr *)stackbuf) | |
216 | sock_kfree_s(sk, kcmsg_base, kcmlen); | |
217 | return err; | |
1da177e4 LT |
218 | } |
219 | ||
220 | int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data) | |
221 | { | |
222 | struct compat_timeval ctv; | |
20d49473 | 223 | struct compat_timespec cts[3]; |
1da177e4 LT |
224 | struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; |
225 | struct compat_cmsghdr cmhdr; | |
226 | int cmlen; | |
227 | ||
e71a4783 | 228 | if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) { |
1da177e4 LT |
229 | kmsg->msg_flags |= MSG_CTRUNC; |
230 | return 0; /* XXX: return error? check spec. */ | |
231 | } | |
232 | ||
d35aac10 | 233 | if (level == SOL_SOCKET && type == SCM_TIMESTAMP) { |
1da177e4 LT |
234 | struct timeval *tv = (struct timeval *)data; |
235 | ctv.tv_sec = tv->tv_sec; | |
236 | ctv.tv_usec = tv->tv_usec; | |
237 | data = &ctv; | |
92f37fd2 ED |
238 | len = sizeof(ctv); |
239 | } | |
20d49473 PO |
240 | if (level == SOL_SOCKET && |
241 | (type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) { | |
242 | int count = type == SCM_TIMESTAMPNS ? 1 : 3; | |
243 | int i; | |
92f37fd2 | 244 | struct timespec *ts = (struct timespec *)data; |
20d49473 PO |
245 | for (i = 0; i < count; i++) { |
246 | cts[i].tv_sec = ts[i].tv_sec; | |
247 | cts[i].tv_nsec = ts[i].tv_nsec; | |
248 | } | |
92f37fd2 | 249 | data = &cts; |
20d49473 | 250 | len = sizeof(cts[0]) * count; |
4768fbcb YH |
251 | } |
252 | ||
1da177e4 | 253 | cmlen = CMSG_COMPAT_LEN(len); |
e71a4783 | 254 | if (kmsg->msg_controllen < cmlen) { |
1da177e4 LT |
255 | kmsg->msg_flags |= MSG_CTRUNC; |
256 | cmlen = kmsg->msg_controllen; | |
257 | } | |
258 | cmhdr.cmsg_level = level; | |
259 | cmhdr.cmsg_type = type; | |
260 | cmhdr.cmsg_len = cmlen; | |
261 | ||
e71a4783 | 262 | if (copy_to_user(cm, &cmhdr, sizeof cmhdr)) |
1da177e4 | 263 | return -EFAULT; |
e71a4783 | 264 | if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr))) |
1da177e4 LT |
265 | return -EFAULT; |
266 | cmlen = CMSG_COMPAT_SPACE(len); | |
1ac70e7a WY |
267 | if (kmsg->msg_controllen < cmlen) |
268 | cmlen = kmsg->msg_controllen; | |
1da177e4 LT |
269 | kmsg->msg_control += cmlen; |
270 | kmsg->msg_controllen -= cmlen; | |
271 | return 0; | |
272 | } | |
273 | ||
274 | void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm) | |
275 | { | |
276 | struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; | |
277 | int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int); | |
278 | int fdnum = scm->fp->count; | |
279 | struct file **fp = scm->fp->fp; | |
280 | int __user *cmfptr; | |
281 | int err = 0, i; | |
282 | ||
283 | if (fdnum < fdmax) | |
284 | fdmax = fdnum; | |
285 | ||
286 | for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) { | |
287 | int new_fd; | |
288 | err = security_file_receive(fp[i]); | |
289 | if (err) | |
290 | break; | |
4a19542e UD |
291 | err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags |
292 | ? O_CLOEXEC : 0); | |
1da177e4 LT |
293 | if (err < 0) |
294 | break; | |
295 | new_fd = err; | |
296 | err = put_user(new_fd, cmfptr); | |
297 | if (err) { | |
298 | put_unused_fd(new_fd); | |
299 | break; | |
300 | } | |
301 | /* Bump the usage count and install the file. */ | |
302 | get_file(fp[i]); | |
303 | fd_install(new_fd, fp[i]); | |
304 | } | |
305 | ||
306 | if (i > 0) { | |
307 | int cmlen = CMSG_COMPAT_LEN(i * sizeof(int)); | |
effee6a0 | 308 | err = put_user(SOL_SOCKET, &cm->cmsg_level); |
1da177e4 LT |
309 | if (!err) |
310 | err = put_user(SCM_RIGHTS, &cm->cmsg_type); | |
311 | if (!err) | |
312 | err = put_user(cmlen, &cm->cmsg_len); | |
313 | if (!err) { | |
314 | cmlen = CMSG_COMPAT_SPACE(i * sizeof(int)); | |
315 | kmsg->msg_control += cmlen; | |
316 | kmsg->msg_controllen -= cmlen; | |
317 | } | |
318 | } | |
319 | if (i < fdnum) | |
320 | kmsg->msg_flags |= MSG_CTRUNC; | |
321 | ||
322 | /* | |
323 | * All of the files that fit in the message have had their | |
324 | * usage counts incremented, so we just free the list. | |
325 | */ | |
326 | __scm_destroy(scm); | |
327 | } | |
328 | ||
1da177e4 LT |
329 | /* |
330 | * A struct sock_filter is architecture independent. | |
331 | */ | |
332 | struct compat_sock_fprog { | |
333 | u16 len; | |
334 | compat_uptr_t filter; /* struct sock_filter * */ | |
335 | }; | |
336 | ||
3fdadf7d | 337 | static int do_set_attach_filter(struct socket *sock, int level, int optname, |
b7058842 | 338 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
339 | { |
340 | struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval; | |
4768fbcb | 341 | struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog)); |
1da177e4 LT |
342 | compat_uptr_t ptr; |
343 | u16 len; | |
344 | ||
345 | if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) || | |
346 | !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) || | |
347 | __get_user(len, &fprog32->len) || | |
348 | __get_user(ptr, &fprog32->filter) || | |
349 | __put_user(len, &kfprog->len) || | |
350 | __put_user(compat_ptr(ptr), &kfprog->filter)) | |
351 | return -EFAULT; | |
352 | ||
3fdadf7d | 353 | return sock_setsockopt(sock, level, optname, (char __user *)kfprog, |
1da177e4 LT |
354 | sizeof(struct sock_fprog)); |
355 | } | |
356 | ||
3fdadf7d | 357 | static int do_set_sock_timeout(struct socket *sock, int level, |
b7058842 | 358 | int optname, char __user *optval, unsigned int optlen) |
1da177e4 | 359 | { |
c6d409cf | 360 | struct compat_timeval __user *up = (struct compat_timeval __user *)optval; |
1da177e4 LT |
361 | struct timeval ktime; |
362 | mm_segment_t old_fs; | |
363 | int err; | |
364 | ||
365 | if (optlen < sizeof(*up)) | |
366 | return -EINVAL; | |
367 | if (!access_ok(VERIFY_READ, up, sizeof(*up)) || | |
368 | __get_user(ktime.tv_sec, &up->tv_sec) || | |
369 | __get_user(ktime.tv_usec, &up->tv_usec)) | |
370 | return -EFAULT; | |
371 | old_fs = get_fs(); | |
372 | set_fs(KERNEL_DS); | |
c6d409cf | 373 | err = sock_setsockopt(sock, level, optname, (char *)&ktime, sizeof(ktime)); |
1da177e4 LT |
374 | set_fs(old_fs); |
375 | ||
376 | return err; | |
377 | } | |
378 | ||
3fdadf7d | 379 | static int compat_sock_setsockopt(struct socket *sock, int level, int optname, |
b7058842 | 380 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
381 | { |
382 | if (optname == SO_ATTACH_FILTER) | |
383 | return do_set_attach_filter(sock, level, optname, | |
384 | optval, optlen); | |
385 | if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) | |
386 | return do_set_sock_timeout(sock, level, optname, optval, optlen); | |
387 | ||
388 | return sock_setsockopt(sock, level, optname, optval, optlen); | |
389 | } | |
390 | ||
1da177e4 | 391 | asmlinkage long compat_sys_setsockopt(int fd, int level, int optname, |
b7058842 | 392 | char __user *optval, unsigned int optlen) |
1da177e4 | 393 | { |
3fdadf7d | 394 | int err; |
c6d409cf | 395 | struct socket *sock = sockfd_lookup(fd, &err); |
3fdadf7d | 396 | |
c6d409cf ED |
397 | if (sock) { |
398 | err = security_socket_setsockopt(sock, level, optname); | |
3fdadf7d DM |
399 | if (err) { |
400 | sockfd_put(sock); | |
401 | return err; | |
402 | } | |
403 | ||
404 | if (level == SOL_SOCKET) | |
405 | err = compat_sock_setsockopt(sock, level, | |
406 | optname, optval, optlen); | |
407 | else if (sock->ops->compat_setsockopt) | |
408 | err = sock->ops->compat_setsockopt(sock, level, | |
409 | optname, optval, optlen); | |
410 | else | |
411 | err = sock->ops->setsockopt(sock, level, | |
412 | optname, optval, optlen); | |
413 | sockfd_put(sock); | |
414 | } | |
415 | return err; | |
1da177e4 LT |
416 | } |
417 | ||
3fdadf7d | 418 | static int do_get_sock_timeout(struct socket *sock, int level, int optname, |
1da177e4 LT |
419 | char __user *optval, int __user *optlen) |
420 | { | |
421 | struct compat_timeval __user *up; | |
422 | struct timeval ktime; | |
423 | mm_segment_t old_fs; | |
424 | int len, err; | |
425 | ||
426 | up = (struct compat_timeval __user *) optval; | |
427 | if (get_user(len, optlen)) | |
428 | return -EFAULT; | |
429 | if (len < sizeof(*up)) | |
430 | return -EINVAL; | |
431 | len = sizeof(ktime); | |
432 | old_fs = get_fs(); | |
433 | set_fs(KERNEL_DS); | |
3fdadf7d | 434 | err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len); |
1da177e4 LT |
435 | set_fs(old_fs); |
436 | ||
437 | if (!err) { | |
438 | if (put_user(sizeof(*up), optlen) || | |
439 | !access_ok(VERIFY_WRITE, up, sizeof(*up)) || | |
440 | __put_user(ktime.tv_sec, &up->tv_sec) || | |
441 | __put_user(ktime.tv_usec, &up->tv_usec)) | |
442 | err = -EFAULT; | |
443 | } | |
444 | return err; | |
445 | } | |
446 | ||
3fdadf7d | 447 | static int compat_sock_getsockopt(struct socket *sock, int level, int optname, |
1da177e4 LT |
448 | char __user *optval, int __user *optlen) |
449 | { | |
3fdadf7d DM |
450 | if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) |
451 | return do_get_sock_timeout(sock, level, optname, optval, optlen); | |
452 | return sock_getsockopt(sock, level, optname, optval, optlen); | |
1da177e4 LT |
453 | } |
454 | ||
f0ac2614 SP |
455 | int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp) |
456 | { | |
457 | struct compat_timeval __user *ctv = | |
c6d409cf | 458 | (struct compat_timeval __user *) userstamp; |
f0ac2614 | 459 | int err = -ENOENT; |
b7aa0bf7 | 460 | struct timeval tv; |
f0ac2614 SP |
461 | |
462 | if (!sock_flag(sk, SOCK_TIMESTAMP)) | |
20d49473 | 463 | sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
b7aa0bf7 ED |
464 | tv = ktime_to_timeval(sk->sk_stamp); |
465 | if (tv.tv_sec == -1) | |
f0ac2614 | 466 | return err; |
b7aa0bf7 ED |
467 | if (tv.tv_sec == 0) { |
468 | sk->sk_stamp = ktime_get_real(); | |
469 | tv = ktime_to_timeval(sk->sk_stamp); | |
470 | } | |
471 | err = 0; | |
472 | if (put_user(tv.tv_sec, &ctv->tv_sec) || | |
473 | put_user(tv.tv_usec, &ctv->tv_usec)) | |
f0ac2614 SP |
474 | err = -EFAULT; |
475 | return err; | |
476 | } | |
477 | EXPORT_SYMBOL(compat_sock_get_timestamp); | |
478 | ||
ae40eb1e ED |
479 | int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp) |
480 | { | |
481 | struct compat_timespec __user *ctv = | |
c6d409cf | 482 | (struct compat_timespec __user *) userstamp; |
ae40eb1e ED |
483 | int err = -ENOENT; |
484 | struct timespec ts; | |
485 | ||
486 | if (!sock_flag(sk, SOCK_TIMESTAMP)) | |
20d49473 | 487 | sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
ae40eb1e ED |
488 | ts = ktime_to_timespec(sk->sk_stamp); |
489 | if (ts.tv_sec == -1) | |
490 | return err; | |
491 | if (ts.tv_sec == 0) { | |
492 | sk->sk_stamp = ktime_get_real(); | |
493 | ts = ktime_to_timespec(sk->sk_stamp); | |
494 | } | |
495 | err = 0; | |
496 | if (put_user(ts.tv_sec, &ctv->tv_sec) || | |
497 | put_user(ts.tv_nsec, &ctv->tv_nsec)) | |
498 | err = -EFAULT; | |
499 | return err; | |
500 | } | |
501 | EXPORT_SYMBOL(compat_sock_get_timestampns); | |
502 | ||
3fdadf7d DM |
503 | asmlinkage long compat_sys_getsockopt(int fd, int level, int optname, |
504 | char __user *optval, int __user *optlen) | |
505 | { | |
506 | int err; | |
c6d409cf | 507 | struct socket *sock = sockfd_lookup(fd, &err); |
3fdadf7d | 508 | |
c6d409cf ED |
509 | if (sock) { |
510 | err = security_socket_getsockopt(sock, level, optname); | |
3fdadf7d DM |
511 | if (err) { |
512 | sockfd_put(sock); | |
513 | return err; | |
514 | } | |
515 | ||
516 | if (level == SOL_SOCKET) | |
517 | err = compat_sock_getsockopt(sock, level, | |
518 | optname, optval, optlen); | |
519 | else if (sock->ops->compat_getsockopt) | |
520 | err = sock->ops->compat_getsockopt(sock, level, | |
521 | optname, optval, optlen); | |
522 | else | |
523 | err = sock->ops->getsockopt(sock, level, | |
524 | optname, optval, optlen); | |
525 | sockfd_put(sock); | |
526 | } | |
527 | return err; | |
528 | } | |
dae50295 DS |
529 | |
530 | struct compat_group_req { | |
531 | __u32 gr_interface; | |
532 | struct __kernel_sockaddr_storage gr_group | |
533 | __attribute__ ((aligned(4))); | |
bc10502d | 534 | } __packed; |
dae50295 DS |
535 | |
536 | struct compat_group_source_req { | |
537 | __u32 gsr_interface; | |
538 | struct __kernel_sockaddr_storage gsr_group | |
539 | __attribute__ ((aligned(4))); | |
540 | struct __kernel_sockaddr_storage gsr_source | |
541 | __attribute__ ((aligned(4))); | |
bc10502d | 542 | } __packed; |
dae50295 DS |
543 | |
544 | struct compat_group_filter { | |
545 | __u32 gf_interface; | |
546 | struct __kernel_sockaddr_storage gf_group | |
547 | __attribute__ ((aligned(4))); | |
548 | __u32 gf_fmode; | |
549 | __u32 gf_numsrc; | |
550 | struct __kernel_sockaddr_storage gf_slist[1] | |
551 | __attribute__ ((aligned(4))); | |
bc10502d | 552 | } __packed; |
dae50295 | 553 | |
be666e0a DS |
554 | #define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \ |
555 | sizeof(struct __kernel_sockaddr_storage)) | |
556 | ||
dae50295 DS |
557 | |
558 | int compat_mc_setsockopt(struct sock *sock, int level, int optname, | |
b7058842 | 559 | char __user *optval, unsigned int optlen, |
c6d409cf | 560 | int (*setsockopt)(struct sock *, int, int, char __user *, unsigned int)) |
dae50295 DS |
561 | { |
562 | char __user *koptval = optval; | |
563 | int koptlen = optlen; | |
564 | ||
565 | switch (optname) { | |
566 | case MCAST_JOIN_GROUP: | |
567 | case MCAST_LEAVE_GROUP: | |
568 | { | |
569 | struct compat_group_req __user *gr32 = (void *)optval; | |
570 | struct group_req __user *kgr = | |
571 | compat_alloc_user_space(sizeof(struct group_req)); | |
572 | u32 interface; | |
573 | ||
574 | if (!access_ok(VERIFY_READ, gr32, sizeof(*gr32)) || | |
575 | !access_ok(VERIFY_WRITE, kgr, sizeof(struct group_req)) || | |
576 | __get_user(interface, &gr32->gr_interface) || | |
577 | __put_user(interface, &kgr->gr_interface) || | |
578 | copy_in_user(&kgr->gr_group, &gr32->gr_group, | |
579 | sizeof(kgr->gr_group))) | |
580 | return -EFAULT; | |
581 | koptval = (char __user *)kgr; | |
582 | koptlen = sizeof(struct group_req); | |
583 | break; | |
584 | } | |
585 | case MCAST_JOIN_SOURCE_GROUP: | |
586 | case MCAST_LEAVE_SOURCE_GROUP: | |
587 | case MCAST_BLOCK_SOURCE: | |
588 | case MCAST_UNBLOCK_SOURCE: | |
589 | { | |
590 | struct compat_group_source_req __user *gsr32 = (void *)optval; | |
be666e0a | 591 | struct group_source_req __user *kgsr = compat_alloc_user_space( |
dae50295 DS |
592 | sizeof(struct group_source_req)); |
593 | u32 interface; | |
594 | ||
595 | if (!access_ok(VERIFY_READ, gsr32, sizeof(*gsr32)) || | |
596 | !access_ok(VERIFY_WRITE, kgsr, | |
597 | sizeof(struct group_source_req)) || | |
598 | __get_user(interface, &gsr32->gsr_interface) || | |
599 | __put_user(interface, &kgsr->gsr_interface) || | |
600 | copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group, | |
601 | sizeof(kgsr->gsr_group)) || | |
602 | copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source, | |
603 | sizeof(kgsr->gsr_source))) | |
604 | return -EFAULT; | |
605 | koptval = (char __user *)kgsr; | |
606 | koptlen = sizeof(struct group_source_req); | |
607 | break; | |
608 | } | |
609 | case MCAST_MSFILTER: | |
610 | { | |
611 | struct compat_group_filter __user *gf32 = (void *)optval; | |
be666e0a | 612 | struct group_filter __user *kgf; |
dae50295 DS |
613 | u32 interface, fmode, numsrc; |
614 | ||
be666e0a | 615 | if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || |
dae50295 DS |
616 | __get_user(interface, &gf32->gf_interface) || |
617 | __get_user(fmode, &gf32->gf_fmode) || | |
618 | __get_user(numsrc, &gf32->gf_numsrc)) | |
619 | return -EFAULT; | |
620 | koptlen = optlen + sizeof(struct group_filter) - | |
621 | sizeof(struct compat_group_filter); | |
622 | if (koptlen < GROUP_FILTER_SIZE(numsrc)) | |
623 | return -EINVAL; | |
624 | kgf = compat_alloc_user_space(koptlen); | |
625 | if (!access_ok(VERIFY_WRITE, kgf, koptlen) || | |
626 | __put_user(interface, &kgf->gf_interface) || | |
627 | __put_user(fmode, &kgf->gf_fmode) || | |
628 | __put_user(numsrc, &kgf->gf_numsrc) || | |
629 | copy_in_user(&kgf->gf_group, &gf32->gf_group, | |
630 | sizeof(kgf->gf_group)) || | |
be666e0a | 631 | (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist, |
dae50295 DS |
632 | numsrc * sizeof(kgf->gf_slist[0])))) |
633 | return -EFAULT; | |
634 | koptval = (char __user *)kgf; | |
635 | break; | |
636 | } | |
637 | ||
638 | default: | |
639 | break; | |
640 | } | |
641 | return setsockopt(sock, level, optname, koptval, koptlen); | |
642 | } | |
dae50295 DS |
643 | EXPORT_SYMBOL(compat_mc_setsockopt); |
644 | ||
42908c69 DS |
645 | int compat_mc_getsockopt(struct sock *sock, int level, int optname, |
646 | char __user *optval, int __user *optlen, | |
c6d409cf | 647 | int (*getsockopt)(struct sock *, int, int, char __user *, int __user *)) |
42908c69 DS |
648 | { |
649 | struct compat_group_filter __user *gf32 = (void *)optval; | |
650 | struct group_filter __user *kgf; | |
651 | int __user *koptlen; | |
652 | u32 interface, fmode, numsrc; | |
653 | int klen, ulen, err; | |
654 | ||
655 | if (optname != MCAST_MSFILTER) | |
656 | return getsockopt(sock, level, optname, optval, optlen); | |
657 | ||
658 | koptlen = compat_alloc_user_space(sizeof(*koptlen)); | |
659 | if (!access_ok(VERIFY_READ, optlen, sizeof(*optlen)) || | |
660 | __get_user(ulen, optlen)) | |
661 | return -EFAULT; | |
662 | ||
663 | /* adjust len for pad */ | |
664 | klen = ulen + sizeof(*kgf) - sizeof(*gf32); | |
665 | ||
666 | if (klen < GROUP_FILTER_SIZE(0)) | |
667 | return -EINVAL; | |
668 | ||
669 | if (!access_ok(VERIFY_WRITE, koptlen, sizeof(*koptlen)) || | |
670 | __put_user(klen, koptlen)) | |
671 | return -EFAULT; | |
672 | ||
673 | /* have to allow space for previous compat_alloc_user_space, too */ | |
674 | kgf = compat_alloc_user_space(klen+sizeof(*optlen)); | |
675 | ||
676 | if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || | |
677 | __get_user(interface, &gf32->gf_interface) || | |
678 | __get_user(fmode, &gf32->gf_fmode) || | |
679 | __get_user(numsrc, &gf32->gf_numsrc) || | |
680 | __put_user(interface, &kgf->gf_interface) || | |
681 | __put_user(fmode, &kgf->gf_fmode) || | |
682 | __put_user(numsrc, &kgf->gf_numsrc) || | |
c6d409cf | 683 | copy_in_user(&kgf->gf_group, &gf32->gf_group, sizeof(kgf->gf_group))) |
42908c69 DS |
684 | return -EFAULT; |
685 | ||
686 | err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen); | |
687 | if (err) | |
688 | return err; | |
689 | ||
690 | if (!access_ok(VERIFY_READ, koptlen, sizeof(*koptlen)) || | |
691 | __get_user(klen, koptlen)) | |
692 | return -EFAULT; | |
693 | ||
694 | ulen = klen - (sizeof(*kgf)-sizeof(*gf32)); | |
695 | ||
696 | if (!access_ok(VERIFY_WRITE, optlen, sizeof(*optlen)) || | |
697 | __put_user(ulen, optlen)) | |
698 | return -EFAULT; | |
699 | ||
700 | if (!access_ok(VERIFY_READ, kgf, klen) || | |
701 | !access_ok(VERIFY_WRITE, gf32, ulen) || | |
702 | __get_user(interface, &kgf->gf_interface) || | |
703 | __get_user(fmode, &kgf->gf_fmode) || | |
704 | __get_user(numsrc, &kgf->gf_numsrc) || | |
705 | __put_user(interface, &gf32->gf_interface) || | |
706 | __put_user(fmode, &gf32->gf_fmode) || | |
707 | __put_user(numsrc, &gf32->gf_numsrc)) | |
708 | return -EFAULT; | |
709 | if (numsrc) { | |
710 | int copylen; | |
711 | ||
712 | klen -= GROUP_FILTER_SIZE(0); | |
713 | copylen = numsrc * sizeof(gf32->gf_slist[0]); | |
714 | if (copylen > klen) | |
715 | copylen = klen; | |
c6d409cf | 716 | if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen)) |
42908c69 DS |
717 | return -EFAULT; |
718 | } | |
719 | return err; | |
720 | } | |
42908c69 DS |
721 | EXPORT_SYMBOL(compat_mc_getsockopt); |
722 | ||
dae50295 | 723 | |
1da177e4 LT |
724 | /* Argument list sizes for compat_sys_socketcall */ |
725 | #define AL(x) ((x) * sizeof(u32)) | |
228e548e | 726 | static unsigned char nas[21] = { |
c6d409cf ED |
727 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
728 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), | |
729 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), | |
228e548e | 730 | AL(4), AL(5), AL(4) |
c6d409cf | 731 | }; |
1da177e4 LT |
732 | #undef AL |
733 | ||
734 | asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned flags) | |
735 | { | |
736 | return sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); | |
737 | } | |
738 | ||
228e548e AB |
739 | asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, |
740 | unsigned vlen, unsigned int flags) | |
741 | { | |
742 | return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, | |
743 | flags | MSG_CMSG_COMPAT); | |
744 | } | |
745 | ||
1da177e4 LT |
746 | asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags) |
747 | { | |
748 | return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); | |
749 | } | |
750 | ||
1dacc76d JB |
751 | asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len, unsigned flags) |
752 | { | |
753 | return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT); | |
754 | } | |
755 | ||
756 | asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, size_t len, | |
757 | unsigned flags, struct sockaddr __user *addr, | |
758 | int __user *addrlen) | |
759 | { | |
760 | return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen); | |
761 | } | |
762 | ||
a2e27255 ACM |
763 | asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg, |
764 | unsigned vlen, unsigned int flags, | |
60c2ffd3 | 765 | struct compat_timespec __user *timeout) |
a2e27255 ACM |
766 | { |
767 | int datagrams; | |
768 | struct timespec ktspec; | |
a2e27255 | 769 | |
5b23136b JMG |
770 | if (timeout == NULL) |
771 | return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, | |
772 | flags | MSG_CMSG_COMPAT, NULL); | |
773 | ||
de039f02 | 774 | if (get_compat_timespec(&ktspec, timeout)) |
a2e27255 ACM |
775 | return -EFAULT; |
776 | ||
777 | datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, | |
778 | flags | MSG_CMSG_COMPAT, &ktspec); | |
de039f02 | 779 | if (datagrams > 0 && put_compat_timespec(&ktspec, timeout)) |
a2e27255 ACM |
780 | datagrams = -EFAULT; |
781 | ||
782 | return datagrams; | |
783 | } | |
784 | ||
1da177e4 LT |
785 | asmlinkage long compat_sys_socketcall(int call, u32 __user *args) |
786 | { | |
787 | int ret; | |
788 | u32 a[6]; | |
789 | u32 a0, a1; | |
4768fbcb | 790 | |
228e548e | 791 | if (call < SYS_SOCKET || call > SYS_SENDMMSG) |
1da177e4 LT |
792 | return -EINVAL; |
793 | if (copy_from_user(a, args, nas[call])) | |
794 | return -EFAULT; | |
795 | a0 = a[0]; | |
796 | a1 = a[1]; | |
4768fbcb | 797 | |
e71a4783 | 798 | switch (call) { |
1da177e4 LT |
799 | case SYS_SOCKET: |
800 | ret = sys_socket(a0, a1, a[2]); | |
801 | break; | |
802 | case SYS_BIND: | |
803 | ret = sys_bind(a0, compat_ptr(a1), a[2]); | |
804 | break; | |
805 | case SYS_CONNECT: | |
806 | ret = sys_connect(a0, compat_ptr(a1), a[2]); | |
807 | break; | |
808 | case SYS_LISTEN: | |
809 | ret = sys_listen(a0, a1); | |
810 | break; | |
811 | case SYS_ACCEPT: | |
de11defe | 812 | ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0); |
1da177e4 LT |
813 | break; |
814 | case SYS_GETSOCKNAME: | |
815 | ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2])); | |
816 | break; | |
817 | case SYS_GETPEERNAME: | |
818 | ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2])); | |
819 | break; | |
820 | case SYS_SOCKETPAIR: | |
821 | ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3])); | |
822 | break; | |
823 | case SYS_SEND: | |
824 | ret = sys_send(a0, compat_ptr(a1), a[2], a[3]); | |
825 | break; | |
826 | case SYS_SENDTO: | |
827 | ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]); | |
828 | break; | |
829 | case SYS_RECV: | |
1dacc76d | 830 | ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]); |
1da177e4 LT |
831 | break; |
832 | case SYS_RECVFROM: | |
1dacc76d JB |
833 | ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], |
834 | compat_ptr(a[4]), compat_ptr(a[5])); | |
1da177e4 LT |
835 | break; |
836 | case SYS_SHUTDOWN: | |
c6d409cf | 837 | ret = sys_shutdown(a0, a1); |
1da177e4 LT |
838 | break; |
839 | case SYS_SETSOCKOPT: | |
840 | ret = compat_sys_setsockopt(a0, a1, a[2], | |
841 | compat_ptr(a[3]), a[4]); | |
842 | break; | |
843 | case SYS_GETSOCKOPT: | |
844 | ret = compat_sys_getsockopt(a0, a1, a[2], | |
845 | compat_ptr(a[3]), compat_ptr(a[4])); | |
846 | break; | |
847 | case SYS_SENDMSG: | |
848 | ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]); | |
849 | break; | |
228e548e AB |
850 | case SYS_SENDMMSG: |
851 | ret = compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]); | |
852 | break; | |
1da177e4 LT |
853 | case SYS_RECVMSG: |
854 | ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]); | |
855 | break; | |
a2e27255 ACM |
856 | case SYS_RECVMMSG: |
857 | ret = compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3], | |
858 | compat_ptr(a[4])); | |
859 | break; | |
de11defe UD |
860 | case SYS_ACCEPT4: |
861 | ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]); | |
aaca0bdc | 862 | break; |
1da177e4 LT |
863 | default: |
864 | ret = -EINVAL; | |
865 | break; | |
866 | } | |
867 | return ret; | |
868 | } |