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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 | ||
08adb7da AV |
34 | ssize_t get_compat_msghdr(struct msghdr *kmsg, |
35 | struct compat_msghdr __user *umsg, | |
36 | struct sockaddr __user **save_addr, | |
37 | struct iovec **iov) | |
1da177e4 | 38 | { |
08adb7da AV |
39 | compat_uptr_t uaddr, uiov, tmp3; |
40 | ssize_t err; | |
1da177e4 LT |
41 | |
42 | if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) || | |
08adb7da | 43 | __get_user(uaddr, &umsg->msg_name) || |
1da177e4 | 44 | __get_user(kmsg->msg_namelen, &umsg->msg_namelen) || |
08adb7da | 45 | __get_user(uiov, &umsg->msg_iov) || |
1da177e4 LT |
46 | __get_user(kmsg->msg_iovlen, &umsg->msg_iovlen) || |
47 | __get_user(tmp3, &umsg->msg_control) || | |
48 | __get_user(kmsg->msg_controllen, &umsg->msg_controllen) || | |
49 | __get_user(kmsg->msg_flags, &umsg->msg_flags)) | |
50 | return -EFAULT; | |
1661bf36 | 51 | if (kmsg->msg_namelen > sizeof(struct sockaddr_storage)) |
db31c55a | 52 | kmsg->msg_namelen = sizeof(struct sockaddr_storage); |
1da177e4 | 53 | kmsg->msg_control = compat_ptr(tmp3); |
1da177e4 | 54 | |
08adb7da AV |
55 | if (save_addr) |
56 | *save_addr = compat_ptr(uaddr); | |
1da177e4 | 57 | |
08adb7da AV |
58 | if (uaddr && kmsg->msg_namelen) { |
59 | if (!save_addr) { | |
60 | err = move_addr_to_kernel(compat_ptr(uaddr), | |
61 | kmsg->msg_namelen, | |
62 | kmsg->msg_name); | |
e71a4783 | 63 | if (err < 0) |
1da177e4 LT |
64 | return err; |
65 | } | |
40eea803 | 66 | } else { |
08adb7da AV |
67 | kmsg->msg_name = NULL; |
68 | kmsg->msg_namelen = 0; | |
40eea803 | 69 | } |
1da177e4 | 70 | |
08adb7da | 71 | if (kmsg->msg_iovlen > UIO_MAXIOV) |
08449320 AV |
72 | return -EMSGSIZE; |
73 | ||
08adb7da AV |
74 | err = compat_rw_copy_check_uvector(save_addr ? READ : WRITE, |
75 | compat_ptr(uiov), kmsg->msg_iovlen, | |
76 | UIO_FASTIOV, *iov, iov); | |
08449320 | 77 | if (err >= 0) |
08adb7da | 78 | kmsg->msg_iov = *iov; |
08449320 | 79 | return err; |
1da177e4 LT |
80 | } |
81 | ||
82 | /* Bleech... */ | |
83 | #define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32)) | |
84 | ||
85 | #define CMSG_COMPAT_DATA(cmsg) \ | |
86 | ((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)))) | |
87 | #define CMSG_COMPAT_SPACE(len) \ | |
88 | (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len)) | |
89 | #define CMSG_COMPAT_LEN(len) \ | |
90 | (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len)) | |
91 | ||
92 | #define CMSG_COMPAT_FIRSTHDR(msg) \ | |
93 | (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \ | |
94 | (struct compat_cmsghdr __user *)((msg)->msg_control) : \ | |
95 | (struct compat_cmsghdr __user *)NULL) | |
96 | ||
97 | #define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \ | |
98 | ((ucmlen) >= sizeof(struct compat_cmsghdr) && \ | |
99 | (ucmlen) <= (unsigned long) \ | |
100 | ((mhdr)->msg_controllen - \ | |
101 | ((char *)(ucmsg) - (char *)(mhdr)->msg_control))) | |
102 | ||
103 | static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg, | |
104 | struct compat_cmsghdr __user *cmsg, int cmsg_len) | |
105 | { | |
106 | char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len); | |
107 | if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) > | |
108 | msg->msg_controllen) | |
109 | return NULL; | |
110 | return (struct compat_cmsghdr __user *)ptr; | |
111 | } | |
112 | ||
113 | /* There is a lot of hair here because the alignment rules (and | |
114 | * thus placement) of cmsg headers and length are different for | |
115 | * 32-bit apps. -DaveM | |
116 | */ | |
8920e8f9 | 117 | int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk, |
1da177e4 LT |
118 | unsigned char *stackbuf, int stackbuf_size) |
119 | { | |
120 | struct compat_cmsghdr __user *ucmsg; | |
121 | struct cmsghdr *kcmsg, *kcmsg_base; | |
122 | compat_size_t ucmlen; | |
123 | __kernel_size_t kcmlen, tmp; | |
8920e8f9 | 124 | int err = -EFAULT; |
1da177e4 LT |
125 | |
126 | kcmlen = 0; | |
127 | kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf; | |
128 | ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); | |
e71a4783 SH |
129 | while (ucmsg != NULL) { |
130 | if (get_user(ucmlen, &ucmsg->cmsg_len)) | |
1da177e4 LT |
131 | return -EFAULT; |
132 | ||
133 | /* Catch bogons. */ | |
134 | if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) | |
135 | return -EINVAL; | |
136 | ||
137 | tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + | |
138 | CMSG_ALIGN(sizeof(struct cmsghdr))); | |
8920e8f9 | 139 | tmp = CMSG_ALIGN(tmp); |
1da177e4 LT |
140 | kcmlen += tmp; |
141 | ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); | |
142 | } | |
e71a4783 | 143 | if (kcmlen == 0) |
1da177e4 LT |
144 | return -EINVAL; |
145 | ||
146 | /* The kcmlen holds the 64-bit version of the control length. | |
147 | * It may not be modified as we do not stick it into the kmsg | |
148 | * until we have successfully copied over all of the data | |
149 | * from the user. | |
150 | */ | |
8920e8f9 AV |
151 | if (kcmlen > stackbuf_size) |
152 | kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL); | |
153 | if (kcmsg == NULL) | |
1da177e4 LT |
154 | return -ENOBUFS; |
155 | ||
156 | /* Now copy them over neatly. */ | |
157 | memset(kcmsg, 0, kcmlen); | |
158 | ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); | |
e71a4783 | 159 | while (ucmsg != NULL) { |
8920e8f9 AV |
160 | if (__get_user(ucmlen, &ucmsg->cmsg_len)) |
161 | goto Efault; | |
162 | if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) | |
163 | goto Einval; | |
1da177e4 LT |
164 | tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + |
165 | CMSG_ALIGN(sizeof(struct cmsghdr))); | |
8920e8f9 AV |
166 | if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp)) |
167 | goto Einval; | |
1da177e4 | 168 | kcmsg->cmsg_len = tmp; |
8920e8f9 AV |
169 | tmp = CMSG_ALIGN(tmp); |
170 | if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) || | |
171 | __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) || | |
172 | copy_from_user(CMSG_DATA(kcmsg), | |
173 | CMSG_COMPAT_DATA(ucmsg), | |
174 | (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))))) | |
175 | goto Efault; | |
1da177e4 LT |
176 | |
177 | /* Advance. */ | |
8920e8f9 | 178 | kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp); |
1da177e4 LT |
179 | ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); |
180 | } | |
181 | ||
182 | /* Ok, looks like we made it. Hook it up and return success. */ | |
183 | kmsg->msg_control = kcmsg_base; | |
184 | kmsg->msg_controllen = kcmlen; | |
185 | return 0; | |
186 | ||
8920e8f9 AV |
187 | Einval: |
188 | err = -EINVAL; | |
189 | Efault: | |
190 | if (kcmsg_base != (struct cmsghdr *)stackbuf) | |
191 | sock_kfree_s(sk, kcmsg_base, kcmlen); | |
192 | return err; | |
1da177e4 LT |
193 | } |
194 | ||
195 | int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data) | |
196 | { | |
1da177e4 LT |
197 | struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; |
198 | struct compat_cmsghdr cmhdr; | |
81881047 JJ |
199 | struct compat_timeval ctv; |
200 | struct compat_timespec cts[3]; | |
1da177e4 LT |
201 | int cmlen; |
202 | ||
e71a4783 | 203 | if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) { |
1da177e4 LT |
204 | kmsg->msg_flags |= MSG_CTRUNC; |
205 | return 0; /* XXX: return error? check spec. */ | |
206 | } | |
207 | ||
ee4fa23c | 208 | if (!COMPAT_USE_64BIT_TIME) { |
ee4fa23c L |
209 | if (level == SOL_SOCKET && type == SCM_TIMESTAMP) { |
210 | struct timeval *tv = (struct timeval *)data; | |
211 | ctv.tv_sec = tv->tv_sec; | |
212 | ctv.tv_usec = tv->tv_usec; | |
213 | data = &ctv; | |
214 | len = sizeof(ctv); | |
215 | } | |
216 | if (level == SOL_SOCKET && | |
217 | (type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) { | |
218 | int count = type == SCM_TIMESTAMPNS ? 1 : 3; | |
219 | int i; | |
220 | struct timespec *ts = (struct timespec *)data; | |
221 | for (i = 0; i < count; i++) { | |
222 | cts[i].tv_sec = ts[i].tv_sec; | |
223 | cts[i].tv_nsec = ts[i].tv_nsec; | |
224 | } | |
225 | data = &cts; | |
226 | len = sizeof(cts[0]) * count; | |
20d49473 | 227 | } |
4768fbcb YH |
228 | } |
229 | ||
1da177e4 | 230 | cmlen = CMSG_COMPAT_LEN(len); |
e71a4783 | 231 | if (kmsg->msg_controllen < cmlen) { |
1da177e4 LT |
232 | kmsg->msg_flags |= MSG_CTRUNC; |
233 | cmlen = kmsg->msg_controllen; | |
234 | } | |
235 | cmhdr.cmsg_level = level; | |
236 | cmhdr.cmsg_type = type; | |
237 | cmhdr.cmsg_len = cmlen; | |
238 | ||
e71a4783 | 239 | if (copy_to_user(cm, &cmhdr, sizeof cmhdr)) |
1da177e4 | 240 | return -EFAULT; |
e71a4783 | 241 | if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr))) |
1da177e4 LT |
242 | return -EFAULT; |
243 | cmlen = CMSG_COMPAT_SPACE(len); | |
1ac70e7a WY |
244 | if (kmsg->msg_controllen < cmlen) |
245 | cmlen = kmsg->msg_controllen; | |
1da177e4 LT |
246 | kmsg->msg_control += cmlen; |
247 | kmsg->msg_controllen -= cmlen; | |
248 | return 0; | |
249 | } | |
250 | ||
251 | void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm) | |
252 | { | |
253 | struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; | |
254 | int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int); | |
255 | int fdnum = scm->fp->count; | |
256 | struct file **fp = scm->fp->fp; | |
257 | int __user *cmfptr; | |
258 | int err = 0, i; | |
259 | ||
260 | if (fdnum < fdmax) | |
261 | fdmax = fdnum; | |
262 | ||
263 | for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) { | |
264 | int new_fd; | |
265 | err = security_file_receive(fp[i]); | |
266 | if (err) | |
267 | break; | |
4a19542e UD |
268 | err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags |
269 | ? O_CLOEXEC : 0); | |
1da177e4 LT |
270 | if (err < 0) |
271 | break; | |
272 | new_fd = err; | |
273 | err = put_user(new_fd, cmfptr); | |
274 | if (err) { | |
275 | put_unused_fd(new_fd); | |
276 | break; | |
277 | } | |
278 | /* Bump the usage count and install the file. */ | |
cb0942b8 | 279 | fd_install(new_fd, get_file(fp[i])); |
1da177e4 LT |
280 | } |
281 | ||
282 | if (i > 0) { | |
283 | int cmlen = CMSG_COMPAT_LEN(i * sizeof(int)); | |
effee6a0 | 284 | err = put_user(SOL_SOCKET, &cm->cmsg_level); |
1da177e4 LT |
285 | if (!err) |
286 | err = put_user(SCM_RIGHTS, &cm->cmsg_type); | |
287 | if (!err) | |
288 | err = put_user(cmlen, &cm->cmsg_len); | |
289 | if (!err) { | |
290 | cmlen = CMSG_COMPAT_SPACE(i * sizeof(int)); | |
291 | kmsg->msg_control += cmlen; | |
292 | kmsg->msg_controllen -= cmlen; | |
293 | } | |
294 | } | |
295 | if (i < fdnum) | |
296 | kmsg->msg_flags |= MSG_CTRUNC; | |
297 | ||
298 | /* | |
299 | * All of the files that fit in the message have had their | |
300 | * usage counts incremented, so we just free the list. | |
301 | */ | |
302 | __scm_destroy(scm); | |
303 | } | |
304 | ||
3fdadf7d | 305 | static int do_set_attach_filter(struct socket *sock, int level, int optname, |
b7058842 | 306 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
307 | { |
308 | struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval; | |
4768fbcb | 309 | struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog)); |
1da177e4 LT |
310 | compat_uptr_t ptr; |
311 | u16 len; | |
312 | ||
313 | if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) || | |
314 | !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) || | |
315 | __get_user(len, &fprog32->len) || | |
316 | __get_user(ptr, &fprog32->filter) || | |
317 | __put_user(len, &kfprog->len) || | |
318 | __put_user(compat_ptr(ptr), &kfprog->filter)) | |
319 | return -EFAULT; | |
320 | ||
3fdadf7d | 321 | return sock_setsockopt(sock, level, optname, (char __user *)kfprog, |
1da177e4 LT |
322 | sizeof(struct sock_fprog)); |
323 | } | |
324 | ||
3fdadf7d | 325 | static int do_set_sock_timeout(struct socket *sock, int level, |
b7058842 | 326 | int optname, char __user *optval, unsigned int optlen) |
1da177e4 | 327 | { |
c6d409cf | 328 | struct compat_timeval __user *up = (struct compat_timeval __user *)optval; |
1da177e4 LT |
329 | struct timeval ktime; |
330 | mm_segment_t old_fs; | |
331 | int err; | |
332 | ||
333 | if (optlen < sizeof(*up)) | |
334 | return -EINVAL; | |
335 | if (!access_ok(VERIFY_READ, up, sizeof(*up)) || | |
336 | __get_user(ktime.tv_sec, &up->tv_sec) || | |
337 | __get_user(ktime.tv_usec, &up->tv_usec)) | |
338 | return -EFAULT; | |
339 | old_fs = get_fs(); | |
340 | set_fs(KERNEL_DS); | |
c6d409cf | 341 | err = sock_setsockopt(sock, level, optname, (char *)&ktime, sizeof(ktime)); |
1da177e4 LT |
342 | set_fs(old_fs); |
343 | ||
344 | return err; | |
345 | } | |
346 | ||
3fdadf7d | 347 | static int compat_sock_setsockopt(struct socket *sock, int level, int optname, |
b7058842 | 348 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
349 | { |
350 | if (optname == SO_ATTACH_FILTER) | |
351 | return do_set_attach_filter(sock, level, optname, | |
352 | optval, optlen); | |
353 | if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) | |
354 | return do_set_sock_timeout(sock, level, optname, optval, optlen); | |
355 | ||
356 | return sock_setsockopt(sock, level, optname, optval, optlen); | |
357 | } | |
358 | ||
361d93c4 HC |
359 | COMPAT_SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
360 | char __user *, optval, unsigned int, optlen) | |
1da177e4 | 361 | { |
3fdadf7d | 362 | int err; |
c6d409cf | 363 | struct socket *sock = sockfd_lookup(fd, &err); |
3fdadf7d | 364 | |
c6d409cf ED |
365 | if (sock) { |
366 | err = security_socket_setsockopt(sock, level, optname); | |
3fdadf7d DM |
367 | if (err) { |
368 | sockfd_put(sock); | |
369 | return err; | |
370 | } | |
371 | ||
372 | if (level == SOL_SOCKET) | |
373 | err = compat_sock_setsockopt(sock, level, | |
374 | optname, optval, optlen); | |
375 | else if (sock->ops->compat_setsockopt) | |
376 | err = sock->ops->compat_setsockopt(sock, level, | |
377 | optname, optval, optlen); | |
378 | else | |
379 | err = sock->ops->setsockopt(sock, level, | |
380 | optname, optval, optlen); | |
381 | sockfd_put(sock); | |
382 | } | |
383 | return err; | |
1da177e4 LT |
384 | } |
385 | ||
3fdadf7d | 386 | static int do_get_sock_timeout(struct socket *sock, int level, int optname, |
1da177e4 LT |
387 | char __user *optval, int __user *optlen) |
388 | { | |
389 | struct compat_timeval __user *up; | |
390 | struct timeval ktime; | |
391 | mm_segment_t old_fs; | |
392 | int len, err; | |
393 | ||
394 | up = (struct compat_timeval __user *) optval; | |
395 | if (get_user(len, optlen)) | |
396 | return -EFAULT; | |
397 | if (len < sizeof(*up)) | |
398 | return -EINVAL; | |
399 | len = sizeof(ktime); | |
400 | old_fs = get_fs(); | |
401 | set_fs(KERNEL_DS); | |
3fdadf7d | 402 | err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len); |
1da177e4 LT |
403 | set_fs(old_fs); |
404 | ||
405 | if (!err) { | |
406 | if (put_user(sizeof(*up), optlen) || | |
407 | !access_ok(VERIFY_WRITE, up, sizeof(*up)) || | |
408 | __put_user(ktime.tv_sec, &up->tv_sec) || | |
409 | __put_user(ktime.tv_usec, &up->tv_usec)) | |
410 | err = -EFAULT; | |
411 | } | |
412 | return err; | |
413 | } | |
414 | ||
3fdadf7d | 415 | static int compat_sock_getsockopt(struct socket *sock, int level, int optname, |
1da177e4 LT |
416 | char __user *optval, int __user *optlen) |
417 | { | |
3fdadf7d DM |
418 | if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) |
419 | return do_get_sock_timeout(sock, level, optname, optval, optlen); | |
420 | return sock_getsockopt(sock, level, optname, optval, optlen); | |
1da177e4 LT |
421 | } |
422 | ||
f0ac2614 SP |
423 | int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp) |
424 | { | |
ee4fa23c L |
425 | struct compat_timeval __user *ctv; |
426 | int err; | |
b7aa0bf7 | 427 | struct timeval tv; |
f0ac2614 | 428 | |
ee4fa23c L |
429 | if (COMPAT_USE_64BIT_TIME) |
430 | return sock_get_timestamp(sk, userstamp); | |
431 | ||
432 | ctv = (struct compat_timeval __user *) userstamp; | |
433 | err = -ENOENT; | |
f0ac2614 | 434 | if (!sock_flag(sk, SOCK_TIMESTAMP)) |
20d49473 | 435 | sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
b7aa0bf7 ED |
436 | tv = ktime_to_timeval(sk->sk_stamp); |
437 | if (tv.tv_sec == -1) | |
f0ac2614 | 438 | return err; |
b7aa0bf7 ED |
439 | if (tv.tv_sec == 0) { |
440 | sk->sk_stamp = ktime_get_real(); | |
441 | tv = ktime_to_timeval(sk->sk_stamp); | |
442 | } | |
443 | err = 0; | |
444 | if (put_user(tv.tv_sec, &ctv->tv_sec) || | |
445 | put_user(tv.tv_usec, &ctv->tv_usec)) | |
f0ac2614 SP |
446 | err = -EFAULT; |
447 | return err; | |
448 | } | |
449 | EXPORT_SYMBOL(compat_sock_get_timestamp); | |
450 | ||
ae40eb1e ED |
451 | int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp) |
452 | { | |
ee4fa23c L |
453 | struct compat_timespec __user *ctv; |
454 | int err; | |
ae40eb1e ED |
455 | struct timespec ts; |
456 | ||
ee4fa23c L |
457 | if (COMPAT_USE_64BIT_TIME) |
458 | return sock_get_timestampns (sk, userstamp); | |
459 | ||
460 | ctv = (struct compat_timespec __user *) userstamp; | |
461 | err = -ENOENT; | |
ae40eb1e | 462 | if (!sock_flag(sk, SOCK_TIMESTAMP)) |
20d49473 | 463 | sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
ae40eb1e ED |
464 | ts = ktime_to_timespec(sk->sk_stamp); |
465 | if (ts.tv_sec == -1) | |
466 | return err; | |
467 | if (ts.tv_sec == 0) { | |
468 | sk->sk_stamp = ktime_get_real(); | |
469 | ts = ktime_to_timespec(sk->sk_stamp); | |
470 | } | |
471 | err = 0; | |
472 | if (put_user(ts.tv_sec, &ctv->tv_sec) || | |
473 | put_user(ts.tv_nsec, &ctv->tv_nsec)) | |
474 | err = -EFAULT; | |
475 | return err; | |
476 | } | |
477 | EXPORT_SYMBOL(compat_sock_get_timestampns); | |
478 | ||
361d93c4 HC |
479 | COMPAT_SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
480 | char __user *, optval, int __user *, optlen) | |
3fdadf7d DM |
481 | { |
482 | int err; | |
c6d409cf | 483 | struct socket *sock = sockfd_lookup(fd, &err); |
3fdadf7d | 484 | |
c6d409cf ED |
485 | if (sock) { |
486 | err = security_socket_getsockopt(sock, level, optname); | |
3fdadf7d DM |
487 | if (err) { |
488 | sockfd_put(sock); | |
489 | return err; | |
490 | } | |
491 | ||
492 | if (level == SOL_SOCKET) | |
493 | err = compat_sock_getsockopt(sock, level, | |
494 | optname, optval, optlen); | |
495 | else if (sock->ops->compat_getsockopt) | |
496 | err = sock->ops->compat_getsockopt(sock, level, | |
497 | optname, optval, optlen); | |
498 | else | |
499 | err = sock->ops->getsockopt(sock, level, | |
500 | optname, optval, optlen); | |
501 | sockfd_put(sock); | |
502 | } | |
503 | return err; | |
504 | } | |
dae50295 DS |
505 | |
506 | struct compat_group_req { | |
507 | __u32 gr_interface; | |
508 | struct __kernel_sockaddr_storage gr_group | |
509 | __attribute__ ((aligned(4))); | |
bc10502d | 510 | } __packed; |
dae50295 DS |
511 | |
512 | struct compat_group_source_req { | |
513 | __u32 gsr_interface; | |
514 | struct __kernel_sockaddr_storage gsr_group | |
515 | __attribute__ ((aligned(4))); | |
516 | struct __kernel_sockaddr_storage gsr_source | |
517 | __attribute__ ((aligned(4))); | |
bc10502d | 518 | } __packed; |
dae50295 DS |
519 | |
520 | struct compat_group_filter { | |
521 | __u32 gf_interface; | |
522 | struct __kernel_sockaddr_storage gf_group | |
523 | __attribute__ ((aligned(4))); | |
524 | __u32 gf_fmode; | |
525 | __u32 gf_numsrc; | |
526 | struct __kernel_sockaddr_storage gf_slist[1] | |
527 | __attribute__ ((aligned(4))); | |
bc10502d | 528 | } __packed; |
dae50295 | 529 | |
be666e0a DS |
530 | #define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \ |
531 | sizeof(struct __kernel_sockaddr_storage)) | |
532 | ||
dae50295 DS |
533 | |
534 | int compat_mc_setsockopt(struct sock *sock, int level, int optname, | |
b7058842 | 535 | char __user *optval, unsigned int optlen, |
c6d409cf | 536 | int (*setsockopt)(struct sock *, int, int, char __user *, unsigned int)) |
dae50295 DS |
537 | { |
538 | char __user *koptval = optval; | |
539 | int koptlen = optlen; | |
540 | ||
541 | switch (optname) { | |
542 | case MCAST_JOIN_GROUP: | |
543 | case MCAST_LEAVE_GROUP: | |
544 | { | |
545 | struct compat_group_req __user *gr32 = (void *)optval; | |
546 | struct group_req __user *kgr = | |
547 | compat_alloc_user_space(sizeof(struct group_req)); | |
548 | u32 interface; | |
549 | ||
550 | if (!access_ok(VERIFY_READ, gr32, sizeof(*gr32)) || | |
551 | !access_ok(VERIFY_WRITE, kgr, sizeof(struct group_req)) || | |
552 | __get_user(interface, &gr32->gr_interface) || | |
553 | __put_user(interface, &kgr->gr_interface) || | |
554 | copy_in_user(&kgr->gr_group, &gr32->gr_group, | |
555 | sizeof(kgr->gr_group))) | |
556 | return -EFAULT; | |
557 | koptval = (char __user *)kgr; | |
558 | koptlen = sizeof(struct group_req); | |
559 | break; | |
560 | } | |
561 | case MCAST_JOIN_SOURCE_GROUP: | |
562 | case MCAST_LEAVE_SOURCE_GROUP: | |
563 | case MCAST_BLOCK_SOURCE: | |
564 | case MCAST_UNBLOCK_SOURCE: | |
565 | { | |
566 | struct compat_group_source_req __user *gsr32 = (void *)optval; | |
be666e0a | 567 | struct group_source_req __user *kgsr = compat_alloc_user_space( |
dae50295 DS |
568 | sizeof(struct group_source_req)); |
569 | u32 interface; | |
570 | ||
571 | if (!access_ok(VERIFY_READ, gsr32, sizeof(*gsr32)) || | |
572 | !access_ok(VERIFY_WRITE, kgsr, | |
573 | sizeof(struct group_source_req)) || | |
574 | __get_user(interface, &gsr32->gsr_interface) || | |
575 | __put_user(interface, &kgsr->gsr_interface) || | |
576 | copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group, | |
577 | sizeof(kgsr->gsr_group)) || | |
578 | copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source, | |
579 | sizeof(kgsr->gsr_source))) | |
580 | return -EFAULT; | |
581 | koptval = (char __user *)kgsr; | |
582 | koptlen = sizeof(struct group_source_req); | |
583 | break; | |
584 | } | |
585 | case MCAST_MSFILTER: | |
586 | { | |
587 | struct compat_group_filter __user *gf32 = (void *)optval; | |
be666e0a | 588 | struct group_filter __user *kgf; |
dae50295 DS |
589 | u32 interface, fmode, numsrc; |
590 | ||
be666e0a | 591 | if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || |
dae50295 DS |
592 | __get_user(interface, &gf32->gf_interface) || |
593 | __get_user(fmode, &gf32->gf_fmode) || | |
594 | __get_user(numsrc, &gf32->gf_numsrc)) | |
595 | return -EFAULT; | |
596 | koptlen = optlen + sizeof(struct group_filter) - | |
597 | sizeof(struct compat_group_filter); | |
598 | if (koptlen < GROUP_FILTER_SIZE(numsrc)) | |
599 | return -EINVAL; | |
600 | kgf = compat_alloc_user_space(koptlen); | |
601 | if (!access_ok(VERIFY_WRITE, kgf, koptlen) || | |
602 | __put_user(interface, &kgf->gf_interface) || | |
603 | __put_user(fmode, &kgf->gf_fmode) || | |
604 | __put_user(numsrc, &kgf->gf_numsrc) || | |
605 | copy_in_user(&kgf->gf_group, &gf32->gf_group, | |
606 | sizeof(kgf->gf_group)) || | |
be666e0a | 607 | (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist, |
dae50295 DS |
608 | numsrc * sizeof(kgf->gf_slist[0])))) |
609 | return -EFAULT; | |
610 | koptval = (char __user *)kgf; | |
611 | break; | |
612 | } | |
613 | ||
614 | default: | |
615 | break; | |
616 | } | |
617 | return setsockopt(sock, level, optname, koptval, koptlen); | |
618 | } | |
dae50295 DS |
619 | EXPORT_SYMBOL(compat_mc_setsockopt); |
620 | ||
42908c69 DS |
621 | int compat_mc_getsockopt(struct sock *sock, int level, int optname, |
622 | char __user *optval, int __user *optlen, | |
c6d409cf | 623 | int (*getsockopt)(struct sock *, int, int, char __user *, int __user *)) |
42908c69 DS |
624 | { |
625 | struct compat_group_filter __user *gf32 = (void *)optval; | |
626 | struct group_filter __user *kgf; | |
627 | int __user *koptlen; | |
628 | u32 interface, fmode, numsrc; | |
629 | int klen, ulen, err; | |
630 | ||
631 | if (optname != MCAST_MSFILTER) | |
632 | return getsockopt(sock, level, optname, optval, optlen); | |
633 | ||
634 | koptlen = compat_alloc_user_space(sizeof(*koptlen)); | |
635 | if (!access_ok(VERIFY_READ, optlen, sizeof(*optlen)) || | |
636 | __get_user(ulen, optlen)) | |
637 | return -EFAULT; | |
638 | ||
639 | /* adjust len for pad */ | |
640 | klen = ulen + sizeof(*kgf) - sizeof(*gf32); | |
641 | ||
642 | if (klen < GROUP_FILTER_SIZE(0)) | |
643 | return -EINVAL; | |
644 | ||
645 | if (!access_ok(VERIFY_WRITE, koptlen, sizeof(*koptlen)) || | |
646 | __put_user(klen, koptlen)) | |
647 | return -EFAULT; | |
648 | ||
649 | /* have to allow space for previous compat_alloc_user_space, too */ | |
650 | kgf = compat_alloc_user_space(klen+sizeof(*optlen)); | |
651 | ||
652 | if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || | |
653 | __get_user(interface, &gf32->gf_interface) || | |
654 | __get_user(fmode, &gf32->gf_fmode) || | |
655 | __get_user(numsrc, &gf32->gf_numsrc) || | |
656 | __put_user(interface, &kgf->gf_interface) || | |
657 | __put_user(fmode, &kgf->gf_fmode) || | |
658 | __put_user(numsrc, &kgf->gf_numsrc) || | |
c6d409cf | 659 | copy_in_user(&kgf->gf_group, &gf32->gf_group, sizeof(kgf->gf_group))) |
42908c69 DS |
660 | return -EFAULT; |
661 | ||
662 | err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen); | |
663 | if (err) | |
664 | return err; | |
665 | ||
666 | if (!access_ok(VERIFY_READ, koptlen, sizeof(*koptlen)) || | |
667 | __get_user(klen, koptlen)) | |
668 | return -EFAULT; | |
669 | ||
670 | ulen = klen - (sizeof(*kgf)-sizeof(*gf32)); | |
671 | ||
672 | if (!access_ok(VERIFY_WRITE, optlen, sizeof(*optlen)) || | |
673 | __put_user(ulen, optlen)) | |
674 | return -EFAULT; | |
675 | ||
676 | if (!access_ok(VERIFY_READ, kgf, klen) || | |
677 | !access_ok(VERIFY_WRITE, gf32, ulen) || | |
678 | __get_user(interface, &kgf->gf_interface) || | |
679 | __get_user(fmode, &kgf->gf_fmode) || | |
680 | __get_user(numsrc, &kgf->gf_numsrc) || | |
681 | __put_user(interface, &gf32->gf_interface) || | |
682 | __put_user(fmode, &gf32->gf_fmode) || | |
683 | __put_user(numsrc, &gf32->gf_numsrc)) | |
684 | return -EFAULT; | |
685 | if (numsrc) { | |
686 | int copylen; | |
687 | ||
688 | klen -= GROUP_FILTER_SIZE(0); | |
689 | copylen = numsrc * sizeof(gf32->gf_slist[0]); | |
690 | if (copylen > klen) | |
691 | copylen = klen; | |
c6d409cf | 692 | if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen)) |
42908c69 DS |
693 | return -EFAULT; |
694 | } | |
695 | return err; | |
696 | } | |
42908c69 DS |
697 | EXPORT_SYMBOL(compat_mc_getsockopt); |
698 | ||
dae50295 | 699 | |
1da177e4 LT |
700 | /* Argument list sizes for compat_sys_socketcall */ |
701 | #define AL(x) ((x) * sizeof(u32)) | |
228e548e | 702 | static unsigned char nas[21] = { |
c6d409cf ED |
703 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
704 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), | |
705 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), | |
228e548e | 706 | AL(4), AL(5), AL(4) |
c6d409cf | 707 | }; |
1da177e4 LT |
708 | #undef AL |
709 | ||
361d93c4 | 710 | COMPAT_SYSCALL_DEFINE3(sendmsg, int, fd, struct compat_msghdr __user *, msg, unsigned int, flags) |
1da177e4 | 711 | { |
a7526eb5 AL |
712 | if (flags & MSG_CMSG_COMPAT) |
713 | return -EINVAL; | |
666547ff | 714 | return __sys_sendmsg(fd, (struct user_msghdr __user *)msg, flags | MSG_CMSG_COMPAT); |
1da177e4 LT |
715 | } |
716 | ||
361d93c4 HC |
717 | COMPAT_SYSCALL_DEFINE4(sendmmsg, int, fd, struct compat_mmsghdr __user *, mmsg, |
718 | unsigned int, vlen, unsigned int, flags) | |
228e548e | 719 | { |
a7526eb5 AL |
720 | if (flags & MSG_CMSG_COMPAT) |
721 | return -EINVAL; | |
228e548e AB |
722 | return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, |
723 | flags | MSG_CMSG_COMPAT); | |
724 | } | |
725 | ||
361d93c4 | 726 | COMPAT_SYSCALL_DEFINE3(recvmsg, int, fd, struct compat_msghdr __user *, msg, unsigned int, flags) |
1da177e4 | 727 | { |
a7526eb5 AL |
728 | if (flags & MSG_CMSG_COMPAT) |
729 | return -EINVAL; | |
666547ff | 730 | return __sys_recvmsg(fd, (struct user_msghdr __user *)msg, flags | MSG_CMSG_COMPAT); |
1da177e4 LT |
731 | } |
732 | ||
3a49a0f7 | 733 | COMPAT_SYSCALL_DEFINE4(recv, int, fd, void __user *, buf, compat_size_t, len, unsigned int, flags) |
1dacc76d JB |
734 | { |
735 | return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT); | |
736 | } | |
737 | ||
3a49a0f7 HC |
738 | COMPAT_SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, buf, compat_size_t, len, |
739 | unsigned int, flags, struct sockaddr __user *, addr, | |
740 | int __user *, addrlen) | |
1dacc76d JB |
741 | { |
742 | return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen); | |
743 | } | |
744 | ||
361d93c4 HC |
745 | COMPAT_SYSCALL_DEFINE5(recvmmsg, int, fd, struct compat_mmsghdr __user *, mmsg, |
746 | unsigned int, vlen, unsigned int, flags, | |
747 | struct compat_timespec __user *, timeout) | |
a2e27255 ACM |
748 | { |
749 | int datagrams; | |
750 | struct timespec ktspec; | |
a2e27255 | 751 | |
a7526eb5 AL |
752 | if (flags & MSG_CMSG_COMPAT) |
753 | return -EINVAL; | |
754 | ||
5b23136b JMG |
755 | if (timeout == NULL) |
756 | return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, | |
757 | flags | MSG_CMSG_COMPAT, NULL); | |
758 | ||
2def2ef2 | 759 | if (compat_get_timespec(&ktspec, timeout)) |
a2e27255 ACM |
760 | return -EFAULT; |
761 | ||
762 | datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, | |
763 | flags | MSG_CMSG_COMPAT, &ktspec); | |
2def2ef2 | 764 | if (datagrams > 0 && compat_put_timespec(&ktspec, timeout)) |
a2e27255 ACM |
765 | datagrams = -EFAULT; |
766 | ||
767 | return datagrams; | |
768 | } | |
769 | ||
361d93c4 | 770 | COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user *, args) |
1da177e4 LT |
771 | { |
772 | int ret; | |
773 | u32 a[6]; | |
774 | u32 a0, a1; | |
4768fbcb | 775 | |
228e548e | 776 | if (call < SYS_SOCKET || call > SYS_SENDMMSG) |
1da177e4 LT |
777 | return -EINVAL; |
778 | if (copy_from_user(a, args, nas[call])) | |
779 | return -EFAULT; | |
780 | a0 = a[0]; | |
781 | a1 = a[1]; | |
4768fbcb | 782 | |
e71a4783 | 783 | switch (call) { |
1da177e4 LT |
784 | case SYS_SOCKET: |
785 | ret = sys_socket(a0, a1, a[2]); | |
786 | break; | |
787 | case SYS_BIND: | |
788 | ret = sys_bind(a0, compat_ptr(a1), a[2]); | |
789 | break; | |
790 | case SYS_CONNECT: | |
791 | ret = sys_connect(a0, compat_ptr(a1), a[2]); | |
792 | break; | |
793 | case SYS_LISTEN: | |
794 | ret = sys_listen(a0, a1); | |
795 | break; | |
796 | case SYS_ACCEPT: | |
de11defe | 797 | ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0); |
1da177e4 LT |
798 | break; |
799 | case SYS_GETSOCKNAME: | |
800 | ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2])); | |
801 | break; | |
802 | case SYS_GETPEERNAME: | |
803 | ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2])); | |
804 | break; | |
805 | case SYS_SOCKETPAIR: | |
806 | ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3])); | |
807 | break; | |
808 | case SYS_SEND: | |
809 | ret = sys_send(a0, compat_ptr(a1), a[2], a[3]); | |
810 | break; | |
811 | case SYS_SENDTO: | |
812 | ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]); | |
813 | break; | |
814 | case SYS_RECV: | |
1dacc76d | 815 | ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]); |
1da177e4 LT |
816 | break; |
817 | case SYS_RECVFROM: | |
1dacc76d JB |
818 | ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], |
819 | compat_ptr(a[4]), compat_ptr(a[5])); | |
1da177e4 LT |
820 | break; |
821 | case SYS_SHUTDOWN: | |
c6d409cf | 822 | ret = sys_shutdown(a0, a1); |
1da177e4 LT |
823 | break; |
824 | case SYS_SETSOCKOPT: | |
825 | ret = compat_sys_setsockopt(a0, a1, a[2], | |
826 | compat_ptr(a[3]), a[4]); | |
827 | break; | |
828 | case SYS_GETSOCKOPT: | |
829 | ret = compat_sys_getsockopt(a0, a1, a[2], | |
830 | compat_ptr(a[3]), compat_ptr(a[4])); | |
831 | break; | |
832 | case SYS_SENDMSG: | |
833 | ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]); | |
834 | break; | |
228e548e AB |
835 | case SYS_SENDMMSG: |
836 | ret = compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]); | |
837 | break; | |
1da177e4 LT |
838 | case SYS_RECVMSG: |
839 | ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]); | |
840 | break; | |
a2e27255 ACM |
841 | case SYS_RECVMMSG: |
842 | ret = compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3], | |
843 | compat_ptr(a[4])); | |
844 | break; | |
de11defe UD |
845 | case SYS_ACCEPT4: |
846 | ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]); | |
aaca0bdc | 847 | break; |
1da177e4 LT |
848 | default: |
849 | ret = -EINVAL; | |
850 | break; | |
851 | } | |
852 | return ret; | |
853 | } |