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 | 39 | compat_uptr_t uaddr, uiov, tmp3; |
c0371da6 | 40 | compat_size_t nr_segs; |
08adb7da | 41 | ssize_t err; |
1da177e4 LT |
42 | |
43 | if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) || | |
08adb7da | 44 | __get_user(uaddr, &umsg->msg_name) || |
1da177e4 | 45 | __get_user(kmsg->msg_namelen, &umsg->msg_namelen) || |
08adb7da | 46 | __get_user(uiov, &umsg->msg_iov) || |
c0371da6 | 47 | __get_user(nr_segs, &umsg->msg_iovlen) || |
1da177e4 LT |
48 | __get_user(tmp3, &umsg->msg_control) || |
49 | __get_user(kmsg->msg_controllen, &umsg->msg_controllen) || | |
50 | __get_user(kmsg->msg_flags, &umsg->msg_flags)) | |
51 | return -EFAULT; | |
1661bf36 | 52 | if (kmsg->msg_namelen > sizeof(struct sockaddr_storage)) |
db31c55a | 53 | kmsg->msg_namelen = sizeof(struct sockaddr_storage); |
1da177e4 | 54 | kmsg->msg_control = compat_ptr(tmp3); |
1da177e4 | 55 | |
08adb7da AV |
56 | if (save_addr) |
57 | *save_addr = compat_ptr(uaddr); | |
1da177e4 | 58 | |
08adb7da AV |
59 | if (uaddr && kmsg->msg_namelen) { |
60 | if (!save_addr) { | |
61 | err = move_addr_to_kernel(compat_ptr(uaddr), | |
62 | kmsg->msg_namelen, | |
63 | kmsg->msg_name); | |
e71a4783 | 64 | if (err < 0) |
1da177e4 LT |
65 | return err; |
66 | } | |
40eea803 | 67 | } else { |
08adb7da AV |
68 | kmsg->msg_name = NULL; |
69 | kmsg->msg_namelen = 0; | |
40eea803 | 70 | } |
1da177e4 | 71 | |
c0371da6 | 72 | if (nr_segs > UIO_MAXIOV) |
08449320 AV |
73 | return -EMSGSIZE; |
74 | ||
08adb7da | 75 | err = compat_rw_copy_check_uvector(save_addr ? READ : WRITE, |
c0371da6 | 76 | compat_ptr(uiov), nr_segs, |
08adb7da | 77 | UIO_FASTIOV, *iov, iov); |
08449320 | 78 | if (err >= 0) |
c0371da6 AV |
79 | iov_iter_init(&kmsg->msg_iter, save_addr ? READ : WRITE, |
80 | *iov, nr_segs, err); | |
08449320 | 81 | return err; |
1da177e4 LT |
82 | } |
83 | ||
84 | /* Bleech... */ | |
85 | #define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32)) | |
86 | ||
87 | #define CMSG_COMPAT_DATA(cmsg) \ | |
88 | ((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)))) | |
89 | #define CMSG_COMPAT_SPACE(len) \ | |
90 | (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len)) | |
91 | #define CMSG_COMPAT_LEN(len) \ | |
92 | (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len)) | |
93 | ||
94 | #define CMSG_COMPAT_FIRSTHDR(msg) \ | |
95 | (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \ | |
96 | (struct compat_cmsghdr __user *)((msg)->msg_control) : \ | |
97 | (struct compat_cmsghdr __user *)NULL) | |
98 | ||
99 | #define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \ | |
100 | ((ucmlen) >= sizeof(struct compat_cmsghdr) && \ | |
101 | (ucmlen) <= (unsigned long) \ | |
102 | ((mhdr)->msg_controllen - \ | |
103 | ((char *)(ucmsg) - (char *)(mhdr)->msg_control))) | |
104 | ||
105 | static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg, | |
106 | struct compat_cmsghdr __user *cmsg, int cmsg_len) | |
107 | { | |
108 | char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len); | |
109 | if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) > | |
110 | msg->msg_controllen) | |
111 | return NULL; | |
112 | return (struct compat_cmsghdr __user *)ptr; | |
113 | } | |
114 | ||
115 | /* There is a lot of hair here because the alignment rules (and | |
116 | * thus placement) of cmsg headers and length are different for | |
117 | * 32-bit apps. -DaveM | |
118 | */ | |
8920e8f9 | 119 | int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk, |
1da177e4 LT |
120 | unsigned char *stackbuf, int stackbuf_size) |
121 | { | |
122 | struct compat_cmsghdr __user *ucmsg; | |
123 | struct cmsghdr *kcmsg, *kcmsg_base; | |
124 | compat_size_t ucmlen; | |
125 | __kernel_size_t kcmlen, tmp; | |
8920e8f9 | 126 | int err = -EFAULT; |
1da177e4 LT |
127 | |
128 | kcmlen = 0; | |
129 | kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf; | |
130 | ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); | |
e71a4783 SH |
131 | while (ucmsg != NULL) { |
132 | if (get_user(ucmlen, &ucmsg->cmsg_len)) | |
1da177e4 LT |
133 | return -EFAULT; |
134 | ||
135 | /* Catch bogons. */ | |
136 | if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) | |
137 | return -EINVAL; | |
138 | ||
139 | tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + | |
140 | CMSG_ALIGN(sizeof(struct cmsghdr))); | |
8920e8f9 | 141 | tmp = CMSG_ALIGN(tmp); |
1da177e4 LT |
142 | kcmlen += tmp; |
143 | ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); | |
144 | } | |
e71a4783 | 145 | if (kcmlen == 0) |
1da177e4 LT |
146 | return -EINVAL; |
147 | ||
148 | /* The kcmlen holds the 64-bit version of the control length. | |
149 | * It may not be modified as we do not stick it into the kmsg | |
150 | * until we have successfully copied over all of the data | |
151 | * from the user. | |
152 | */ | |
8920e8f9 AV |
153 | if (kcmlen > stackbuf_size) |
154 | kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL); | |
155 | if (kcmsg == NULL) | |
1da177e4 LT |
156 | return -ENOBUFS; |
157 | ||
158 | /* Now copy them over neatly. */ | |
159 | memset(kcmsg, 0, kcmlen); | |
160 | ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); | |
e71a4783 | 161 | while (ucmsg != NULL) { |
8920e8f9 AV |
162 | if (__get_user(ucmlen, &ucmsg->cmsg_len)) |
163 | goto Efault; | |
164 | if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) | |
165 | goto Einval; | |
1da177e4 LT |
166 | tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + |
167 | CMSG_ALIGN(sizeof(struct cmsghdr))); | |
8920e8f9 AV |
168 | if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp)) |
169 | goto Einval; | |
1da177e4 | 170 | kcmsg->cmsg_len = tmp; |
8920e8f9 AV |
171 | tmp = CMSG_ALIGN(tmp); |
172 | if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) || | |
173 | __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) || | |
174 | copy_from_user(CMSG_DATA(kcmsg), | |
175 | CMSG_COMPAT_DATA(ucmsg), | |
176 | (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))))) | |
177 | goto Efault; | |
1da177e4 LT |
178 | |
179 | /* Advance. */ | |
8920e8f9 | 180 | kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp); |
1da177e4 LT |
181 | ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); |
182 | } | |
183 | ||
184 | /* Ok, looks like we made it. Hook it up and return success. */ | |
185 | kmsg->msg_control = kcmsg_base; | |
186 | kmsg->msg_controllen = kcmlen; | |
187 | return 0; | |
188 | ||
8920e8f9 AV |
189 | Einval: |
190 | err = -EINVAL; | |
191 | Efault: | |
192 | if (kcmsg_base != (struct cmsghdr *)stackbuf) | |
193 | sock_kfree_s(sk, kcmsg_base, kcmlen); | |
194 | return err; | |
1da177e4 LT |
195 | } |
196 | ||
197 | int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data) | |
198 | { | |
1da177e4 LT |
199 | struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; |
200 | struct compat_cmsghdr cmhdr; | |
81881047 JJ |
201 | struct compat_timeval ctv; |
202 | struct compat_timespec cts[3]; | |
1da177e4 LT |
203 | int cmlen; |
204 | ||
e71a4783 | 205 | if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) { |
1da177e4 LT |
206 | kmsg->msg_flags |= MSG_CTRUNC; |
207 | return 0; /* XXX: return error? check spec. */ | |
208 | } | |
209 | ||
ee4fa23c | 210 | if (!COMPAT_USE_64BIT_TIME) { |
ee4fa23c L |
211 | if (level == SOL_SOCKET && type == SCM_TIMESTAMP) { |
212 | struct timeval *tv = (struct timeval *)data; | |
213 | ctv.tv_sec = tv->tv_sec; | |
214 | ctv.tv_usec = tv->tv_usec; | |
215 | data = &ctv; | |
216 | len = sizeof(ctv); | |
217 | } | |
218 | if (level == SOL_SOCKET && | |
219 | (type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) { | |
220 | int count = type == SCM_TIMESTAMPNS ? 1 : 3; | |
221 | int i; | |
222 | struct timespec *ts = (struct timespec *)data; | |
223 | for (i = 0; i < count; i++) { | |
224 | cts[i].tv_sec = ts[i].tv_sec; | |
225 | cts[i].tv_nsec = ts[i].tv_nsec; | |
226 | } | |
227 | data = &cts; | |
228 | len = sizeof(cts[0]) * count; | |
20d49473 | 229 | } |
4768fbcb YH |
230 | } |
231 | ||
1da177e4 | 232 | cmlen = CMSG_COMPAT_LEN(len); |
e71a4783 | 233 | if (kmsg->msg_controllen < cmlen) { |
1da177e4 LT |
234 | kmsg->msg_flags |= MSG_CTRUNC; |
235 | cmlen = kmsg->msg_controllen; | |
236 | } | |
237 | cmhdr.cmsg_level = level; | |
238 | cmhdr.cmsg_type = type; | |
239 | cmhdr.cmsg_len = cmlen; | |
240 | ||
e71a4783 | 241 | if (copy_to_user(cm, &cmhdr, sizeof cmhdr)) |
1da177e4 | 242 | return -EFAULT; |
e71a4783 | 243 | if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr))) |
1da177e4 LT |
244 | return -EFAULT; |
245 | cmlen = CMSG_COMPAT_SPACE(len); | |
1ac70e7a WY |
246 | if (kmsg->msg_controllen < cmlen) |
247 | cmlen = kmsg->msg_controllen; | |
1da177e4 LT |
248 | kmsg->msg_control += cmlen; |
249 | kmsg->msg_controllen -= cmlen; | |
250 | return 0; | |
251 | } | |
252 | ||
253 | void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm) | |
254 | { | |
255 | struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; | |
256 | int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int); | |
257 | int fdnum = scm->fp->count; | |
258 | struct file **fp = scm->fp->fp; | |
259 | int __user *cmfptr; | |
260 | int err = 0, i; | |
261 | ||
262 | if (fdnum < fdmax) | |
263 | fdmax = fdnum; | |
264 | ||
265 | for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) { | |
266 | int new_fd; | |
267 | err = security_file_receive(fp[i]); | |
268 | if (err) | |
269 | break; | |
4a19542e UD |
270 | err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags |
271 | ? O_CLOEXEC : 0); | |
1da177e4 LT |
272 | if (err < 0) |
273 | break; | |
274 | new_fd = err; | |
275 | err = put_user(new_fd, cmfptr); | |
276 | if (err) { | |
277 | put_unused_fd(new_fd); | |
278 | break; | |
279 | } | |
280 | /* Bump the usage count and install the file. */ | |
cb0942b8 | 281 | fd_install(new_fd, get_file(fp[i])); |
1da177e4 LT |
282 | } |
283 | ||
284 | if (i > 0) { | |
285 | int cmlen = CMSG_COMPAT_LEN(i * sizeof(int)); | |
effee6a0 | 286 | err = put_user(SOL_SOCKET, &cm->cmsg_level); |
1da177e4 LT |
287 | if (!err) |
288 | err = put_user(SCM_RIGHTS, &cm->cmsg_type); | |
289 | if (!err) | |
290 | err = put_user(cmlen, &cm->cmsg_len); | |
291 | if (!err) { | |
292 | cmlen = CMSG_COMPAT_SPACE(i * sizeof(int)); | |
293 | kmsg->msg_control += cmlen; | |
294 | kmsg->msg_controllen -= cmlen; | |
295 | } | |
296 | } | |
297 | if (i < fdnum) | |
298 | kmsg->msg_flags |= MSG_CTRUNC; | |
299 | ||
300 | /* | |
301 | * All of the files that fit in the message have had their | |
302 | * usage counts incremented, so we just free the list. | |
303 | */ | |
304 | __scm_destroy(scm); | |
305 | } | |
306 | ||
3fdadf7d | 307 | static int do_set_attach_filter(struct socket *sock, int level, int optname, |
b7058842 | 308 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
309 | { |
310 | struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval; | |
4768fbcb | 311 | struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog)); |
1da177e4 LT |
312 | compat_uptr_t ptr; |
313 | u16 len; | |
314 | ||
315 | if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) || | |
316 | !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) || | |
317 | __get_user(len, &fprog32->len) || | |
318 | __get_user(ptr, &fprog32->filter) || | |
319 | __put_user(len, &kfprog->len) || | |
320 | __put_user(compat_ptr(ptr), &kfprog->filter)) | |
321 | return -EFAULT; | |
322 | ||
3fdadf7d | 323 | return sock_setsockopt(sock, level, optname, (char __user *)kfprog, |
1da177e4 LT |
324 | sizeof(struct sock_fprog)); |
325 | } | |
326 | ||
3fdadf7d | 327 | static int do_set_sock_timeout(struct socket *sock, int level, |
b7058842 | 328 | int optname, char __user *optval, unsigned int optlen) |
1da177e4 | 329 | { |
c6d409cf | 330 | struct compat_timeval __user *up = (struct compat_timeval __user *)optval; |
1da177e4 LT |
331 | struct timeval ktime; |
332 | mm_segment_t old_fs; | |
333 | int err; | |
334 | ||
335 | if (optlen < sizeof(*up)) | |
336 | return -EINVAL; | |
337 | if (!access_ok(VERIFY_READ, up, sizeof(*up)) || | |
338 | __get_user(ktime.tv_sec, &up->tv_sec) || | |
339 | __get_user(ktime.tv_usec, &up->tv_usec)) | |
340 | return -EFAULT; | |
341 | old_fs = get_fs(); | |
342 | set_fs(KERNEL_DS); | |
c6d409cf | 343 | err = sock_setsockopt(sock, level, optname, (char *)&ktime, sizeof(ktime)); |
1da177e4 LT |
344 | set_fs(old_fs); |
345 | ||
346 | return err; | |
347 | } | |
348 | ||
3fdadf7d | 349 | static int compat_sock_setsockopt(struct socket *sock, int level, int optname, |
b7058842 | 350 | char __user *optval, unsigned int optlen) |
3fdadf7d DM |
351 | { |
352 | if (optname == SO_ATTACH_FILTER) | |
353 | return do_set_attach_filter(sock, level, optname, | |
354 | optval, optlen); | |
355 | if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) | |
356 | return do_set_sock_timeout(sock, level, optname, optval, optlen); | |
357 | ||
358 | return sock_setsockopt(sock, level, optname, optval, optlen); | |
359 | } | |
360 | ||
361d93c4 HC |
361 | COMPAT_SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
362 | char __user *, optval, unsigned int, optlen) | |
1da177e4 | 363 | { |
3fdadf7d | 364 | int err; |
c6d409cf | 365 | struct socket *sock = sockfd_lookup(fd, &err); |
3fdadf7d | 366 | |
c6d409cf ED |
367 | if (sock) { |
368 | err = security_socket_setsockopt(sock, level, optname); | |
3fdadf7d DM |
369 | if (err) { |
370 | sockfd_put(sock); | |
371 | return err; | |
372 | } | |
373 | ||
374 | if (level == SOL_SOCKET) | |
375 | err = compat_sock_setsockopt(sock, level, | |
376 | optname, optval, optlen); | |
377 | else if (sock->ops->compat_setsockopt) | |
378 | err = sock->ops->compat_setsockopt(sock, level, | |
379 | optname, optval, optlen); | |
380 | else | |
381 | err = sock->ops->setsockopt(sock, level, | |
382 | optname, optval, optlen); | |
383 | sockfd_put(sock); | |
384 | } | |
385 | return err; | |
1da177e4 LT |
386 | } |
387 | ||
3fdadf7d | 388 | static int do_get_sock_timeout(struct socket *sock, int level, int optname, |
1da177e4 LT |
389 | char __user *optval, int __user *optlen) |
390 | { | |
391 | struct compat_timeval __user *up; | |
392 | struct timeval ktime; | |
393 | mm_segment_t old_fs; | |
394 | int len, err; | |
395 | ||
396 | up = (struct compat_timeval __user *) optval; | |
397 | if (get_user(len, optlen)) | |
398 | return -EFAULT; | |
399 | if (len < sizeof(*up)) | |
400 | return -EINVAL; | |
401 | len = sizeof(ktime); | |
402 | old_fs = get_fs(); | |
403 | set_fs(KERNEL_DS); | |
3fdadf7d | 404 | err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len); |
1da177e4 LT |
405 | set_fs(old_fs); |
406 | ||
407 | if (!err) { | |
408 | if (put_user(sizeof(*up), optlen) || | |
409 | !access_ok(VERIFY_WRITE, up, sizeof(*up)) || | |
410 | __put_user(ktime.tv_sec, &up->tv_sec) || | |
411 | __put_user(ktime.tv_usec, &up->tv_usec)) | |
412 | err = -EFAULT; | |
413 | } | |
414 | return err; | |
415 | } | |
416 | ||
3fdadf7d | 417 | static int compat_sock_getsockopt(struct socket *sock, int level, int optname, |
1da177e4 LT |
418 | char __user *optval, int __user *optlen) |
419 | { | |
3fdadf7d DM |
420 | if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) |
421 | return do_get_sock_timeout(sock, level, optname, optval, optlen); | |
422 | return sock_getsockopt(sock, level, optname, optval, optlen); | |
1da177e4 LT |
423 | } |
424 | ||
f0ac2614 SP |
425 | int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp) |
426 | { | |
ee4fa23c L |
427 | struct compat_timeval __user *ctv; |
428 | int err; | |
b7aa0bf7 | 429 | struct timeval tv; |
f0ac2614 | 430 | |
ee4fa23c L |
431 | if (COMPAT_USE_64BIT_TIME) |
432 | return sock_get_timestamp(sk, userstamp); | |
433 | ||
434 | ctv = (struct compat_timeval __user *) userstamp; | |
435 | err = -ENOENT; | |
f0ac2614 | 436 | if (!sock_flag(sk, SOCK_TIMESTAMP)) |
20d49473 | 437 | sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
b7aa0bf7 ED |
438 | tv = ktime_to_timeval(sk->sk_stamp); |
439 | if (tv.tv_sec == -1) | |
f0ac2614 | 440 | return err; |
b7aa0bf7 ED |
441 | if (tv.tv_sec == 0) { |
442 | sk->sk_stamp = ktime_get_real(); | |
443 | tv = ktime_to_timeval(sk->sk_stamp); | |
444 | } | |
445 | err = 0; | |
446 | if (put_user(tv.tv_sec, &ctv->tv_sec) || | |
447 | put_user(tv.tv_usec, &ctv->tv_usec)) | |
f0ac2614 SP |
448 | err = -EFAULT; |
449 | return err; | |
450 | } | |
451 | EXPORT_SYMBOL(compat_sock_get_timestamp); | |
452 | ||
ae40eb1e ED |
453 | int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp) |
454 | { | |
ee4fa23c L |
455 | struct compat_timespec __user *ctv; |
456 | int err; | |
ae40eb1e ED |
457 | struct timespec ts; |
458 | ||
ee4fa23c L |
459 | if (COMPAT_USE_64BIT_TIME) |
460 | return sock_get_timestampns (sk, userstamp); | |
461 | ||
462 | ctv = (struct compat_timespec __user *) userstamp; | |
463 | err = -ENOENT; | |
ae40eb1e | 464 | if (!sock_flag(sk, SOCK_TIMESTAMP)) |
20d49473 | 465 | sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
ae40eb1e ED |
466 | ts = ktime_to_timespec(sk->sk_stamp); |
467 | if (ts.tv_sec == -1) | |
468 | return err; | |
469 | if (ts.tv_sec == 0) { | |
470 | sk->sk_stamp = ktime_get_real(); | |
471 | ts = ktime_to_timespec(sk->sk_stamp); | |
472 | } | |
473 | err = 0; | |
474 | if (put_user(ts.tv_sec, &ctv->tv_sec) || | |
475 | put_user(ts.tv_nsec, &ctv->tv_nsec)) | |
476 | err = -EFAULT; | |
477 | return err; | |
478 | } | |
479 | EXPORT_SYMBOL(compat_sock_get_timestampns); | |
480 | ||
361d93c4 HC |
481 | COMPAT_SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
482 | char __user *, optval, int __user *, optlen) | |
3fdadf7d DM |
483 | { |
484 | int err; | |
c6d409cf | 485 | struct socket *sock = sockfd_lookup(fd, &err); |
3fdadf7d | 486 | |
c6d409cf ED |
487 | if (sock) { |
488 | err = security_socket_getsockopt(sock, level, optname); | |
3fdadf7d DM |
489 | if (err) { |
490 | sockfd_put(sock); | |
491 | return err; | |
492 | } | |
493 | ||
494 | if (level == SOL_SOCKET) | |
495 | err = compat_sock_getsockopt(sock, level, | |
496 | optname, optval, optlen); | |
497 | else if (sock->ops->compat_getsockopt) | |
498 | err = sock->ops->compat_getsockopt(sock, level, | |
499 | optname, optval, optlen); | |
500 | else | |
501 | err = sock->ops->getsockopt(sock, level, | |
502 | optname, optval, optlen); | |
503 | sockfd_put(sock); | |
504 | } | |
505 | return err; | |
506 | } | |
dae50295 DS |
507 | |
508 | struct compat_group_req { | |
509 | __u32 gr_interface; | |
510 | struct __kernel_sockaddr_storage gr_group | |
e099b2d9 | 511 | __aligned(4); |
bc10502d | 512 | } __packed; |
dae50295 DS |
513 | |
514 | struct compat_group_source_req { | |
515 | __u32 gsr_interface; | |
516 | struct __kernel_sockaddr_storage gsr_group | |
e099b2d9 | 517 | __aligned(4); |
dae50295 | 518 | struct __kernel_sockaddr_storage gsr_source |
e099b2d9 | 519 | __aligned(4); |
bc10502d | 520 | } __packed; |
dae50295 DS |
521 | |
522 | struct compat_group_filter { | |
523 | __u32 gf_interface; | |
524 | struct __kernel_sockaddr_storage gf_group | |
e099b2d9 | 525 | __aligned(4); |
dae50295 DS |
526 | __u32 gf_fmode; |
527 | __u32 gf_numsrc; | |
528 | struct __kernel_sockaddr_storage gf_slist[1] | |
e099b2d9 | 529 | __aligned(4); |
bc10502d | 530 | } __packed; |
dae50295 | 531 | |
be666e0a DS |
532 | #define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \ |
533 | sizeof(struct __kernel_sockaddr_storage)) | |
534 | ||
dae50295 DS |
535 | |
536 | int compat_mc_setsockopt(struct sock *sock, int level, int optname, | |
b7058842 | 537 | char __user *optval, unsigned int optlen, |
c6d409cf | 538 | int (*setsockopt)(struct sock *, int, int, char __user *, unsigned int)) |
dae50295 DS |
539 | { |
540 | char __user *koptval = optval; | |
541 | int koptlen = optlen; | |
542 | ||
543 | switch (optname) { | |
544 | case MCAST_JOIN_GROUP: | |
545 | case MCAST_LEAVE_GROUP: | |
546 | { | |
547 | struct compat_group_req __user *gr32 = (void *)optval; | |
548 | struct group_req __user *kgr = | |
549 | compat_alloc_user_space(sizeof(struct group_req)); | |
550 | u32 interface; | |
551 | ||
552 | if (!access_ok(VERIFY_READ, gr32, sizeof(*gr32)) || | |
553 | !access_ok(VERIFY_WRITE, kgr, sizeof(struct group_req)) || | |
554 | __get_user(interface, &gr32->gr_interface) || | |
555 | __put_user(interface, &kgr->gr_interface) || | |
556 | copy_in_user(&kgr->gr_group, &gr32->gr_group, | |
557 | sizeof(kgr->gr_group))) | |
558 | return -EFAULT; | |
559 | koptval = (char __user *)kgr; | |
560 | koptlen = sizeof(struct group_req); | |
561 | break; | |
562 | } | |
563 | case MCAST_JOIN_SOURCE_GROUP: | |
564 | case MCAST_LEAVE_SOURCE_GROUP: | |
565 | case MCAST_BLOCK_SOURCE: | |
566 | case MCAST_UNBLOCK_SOURCE: | |
567 | { | |
568 | struct compat_group_source_req __user *gsr32 = (void *)optval; | |
be666e0a | 569 | struct group_source_req __user *kgsr = compat_alloc_user_space( |
dae50295 DS |
570 | sizeof(struct group_source_req)); |
571 | u32 interface; | |
572 | ||
573 | if (!access_ok(VERIFY_READ, gsr32, sizeof(*gsr32)) || | |
574 | !access_ok(VERIFY_WRITE, kgsr, | |
575 | sizeof(struct group_source_req)) || | |
576 | __get_user(interface, &gsr32->gsr_interface) || | |
577 | __put_user(interface, &kgsr->gsr_interface) || | |
578 | copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group, | |
579 | sizeof(kgsr->gsr_group)) || | |
580 | copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source, | |
581 | sizeof(kgsr->gsr_source))) | |
582 | return -EFAULT; | |
583 | koptval = (char __user *)kgsr; | |
584 | koptlen = sizeof(struct group_source_req); | |
585 | break; | |
586 | } | |
587 | case MCAST_MSFILTER: | |
588 | { | |
589 | struct compat_group_filter __user *gf32 = (void *)optval; | |
be666e0a | 590 | struct group_filter __user *kgf; |
dae50295 DS |
591 | u32 interface, fmode, numsrc; |
592 | ||
be666e0a | 593 | if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || |
dae50295 DS |
594 | __get_user(interface, &gf32->gf_interface) || |
595 | __get_user(fmode, &gf32->gf_fmode) || | |
596 | __get_user(numsrc, &gf32->gf_numsrc)) | |
597 | return -EFAULT; | |
598 | koptlen = optlen + sizeof(struct group_filter) - | |
599 | sizeof(struct compat_group_filter); | |
600 | if (koptlen < GROUP_FILTER_SIZE(numsrc)) | |
601 | return -EINVAL; | |
602 | kgf = compat_alloc_user_space(koptlen); | |
603 | if (!access_ok(VERIFY_WRITE, kgf, koptlen) || | |
604 | __put_user(interface, &kgf->gf_interface) || | |
605 | __put_user(fmode, &kgf->gf_fmode) || | |
606 | __put_user(numsrc, &kgf->gf_numsrc) || | |
607 | copy_in_user(&kgf->gf_group, &gf32->gf_group, | |
608 | sizeof(kgf->gf_group)) || | |
be666e0a | 609 | (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist, |
dae50295 DS |
610 | numsrc * sizeof(kgf->gf_slist[0])))) |
611 | return -EFAULT; | |
612 | koptval = (char __user *)kgf; | |
613 | break; | |
614 | } | |
615 | ||
616 | default: | |
617 | break; | |
618 | } | |
619 | return setsockopt(sock, level, optname, koptval, koptlen); | |
620 | } | |
dae50295 DS |
621 | EXPORT_SYMBOL(compat_mc_setsockopt); |
622 | ||
42908c69 DS |
623 | int compat_mc_getsockopt(struct sock *sock, int level, int optname, |
624 | char __user *optval, int __user *optlen, | |
c6d409cf | 625 | int (*getsockopt)(struct sock *, int, int, char __user *, int __user *)) |
42908c69 DS |
626 | { |
627 | struct compat_group_filter __user *gf32 = (void *)optval; | |
628 | struct group_filter __user *kgf; | |
629 | int __user *koptlen; | |
630 | u32 interface, fmode, numsrc; | |
631 | int klen, ulen, err; | |
632 | ||
633 | if (optname != MCAST_MSFILTER) | |
634 | return getsockopt(sock, level, optname, optval, optlen); | |
635 | ||
636 | koptlen = compat_alloc_user_space(sizeof(*koptlen)); | |
637 | if (!access_ok(VERIFY_READ, optlen, sizeof(*optlen)) || | |
638 | __get_user(ulen, optlen)) | |
639 | return -EFAULT; | |
640 | ||
641 | /* adjust len for pad */ | |
642 | klen = ulen + sizeof(*kgf) - sizeof(*gf32); | |
643 | ||
644 | if (klen < GROUP_FILTER_SIZE(0)) | |
645 | return -EINVAL; | |
646 | ||
647 | if (!access_ok(VERIFY_WRITE, koptlen, sizeof(*koptlen)) || | |
648 | __put_user(klen, koptlen)) | |
649 | return -EFAULT; | |
650 | ||
651 | /* have to allow space for previous compat_alloc_user_space, too */ | |
652 | kgf = compat_alloc_user_space(klen+sizeof(*optlen)); | |
653 | ||
654 | if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || | |
655 | __get_user(interface, &gf32->gf_interface) || | |
656 | __get_user(fmode, &gf32->gf_fmode) || | |
657 | __get_user(numsrc, &gf32->gf_numsrc) || | |
658 | __put_user(interface, &kgf->gf_interface) || | |
659 | __put_user(fmode, &kgf->gf_fmode) || | |
660 | __put_user(numsrc, &kgf->gf_numsrc) || | |
c6d409cf | 661 | copy_in_user(&kgf->gf_group, &gf32->gf_group, sizeof(kgf->gf_group))) |
42908c69 DS |
662 | return -EFAULT; |
663 | ||
664 | err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen); | |
665 | if (err) | |
666 | return err; | |
667 | ||
668 | if (!access_ok(VERIFY_READ, koptlen, sizeof(*koptlen)) || | |
669 | __get_user(klen, koptlen)) | |
670 | return -EFAULT; | |
671 | ||
672 | ulen = klen - (sizeof(*kgf)-sizeof(*gf32)); | |
673 | ||
674 | if (!access_ok(VERIFY_WRITE, optlen, sizeof(*optlen)) || | |
675 | __put_user(ulen, optlen)) | |
676 | return -EFAULT; | |
677 | ||
678 | if (!access_ok(VERIFY_READ, kgf, klen) || | |
679 | !access_ok(VERIFY_WRITE, gf32, ulen) || | |
680 | __get_user(interface, &kgf->gf_interface) || | |
681 | __get_user(fmode, &kgf->gf_fmode) || | |
682 | __get_user(numsrc, &kgf->gf_numsrc) || | |
683 | __put_user(interface, &gf32->gf_interface) || | |
684 | __put_user(fmode, &gf32->gf_fmode) || | |
685 | __put_user(numsrc, &gf32->gf_numsrc)) | |
686 | return -EFAULT; | |
687 | if (numsrc) { | |
688 | int copylen; | |
689 | ||
690 | klen -= GROUP_FILTER_SIZE(0); | |
691 | copylen = numsrc * sizeof(gf32->gf_slist[0]); | |
692 | if (copylen > klen) | |
693 | copylen = klen; | |
c6d409cf | 694 | if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen)) |
42908c69 DS |
695 | return -EFAULT; |
696 | } | |
697 | return err; | |
698 | } | |
42908c69 DS |
699 | EXPORT_SYMBOL(compat_mc_getsockopt); |
700 | ||
dae50295 | 701 | |
1da177e4 LT |
702 | /* Argument list sizes for compat_sys_socketcall */ |
703 | #define AL(x) ((x) * sizeof(u32)) | |
228e548e | 704 | static unsigned char nas[21] = { |
c6d409cf ED |
705 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
706 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), | |
707 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), | |
228e548e | 708 | AL(4), AL(5), AL(4) |
c6d409cf | 709 | }; |
1da177e4 LT |
710 | #undef AL |
711 | ||
361d93c4 | 712 | COMPAT_SYSCALL_DEFINE3(sendmsg, int, fd, struct compat_msghdr __user *, msg, unsigned int, flags) |
1da177e4 | 713 | { |
a7526eb5 AL |
714 | if (flags & MSG_CMSG_COMPAT) |
715 | return -EINVAL; | |
666547ff | 716 | return __sys_sendmsg(fd, (struct user_msghdr __user *)msg, flags | MSG_CMSG_COMPAT); |
1da177e4 LT |
717 | } |
718 | ||
361d93c4 HC |
719 | COMPAT_SYSCALL_DEFINE4(sendmmsg, int, fd, struct compat_mmsghdr __user *, mmsg, |
720 | unsigned int, vlen, unsigned int, flags) | |
228e548e | 721 | { |
a7526eb5 AL |
722 | if (flags & MSG_CMSG_COMPAT) |
723 | return -EINVAL; | |
228e548e AB |
724 | return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, |
725 | flags | MSG_CMSG_COMPAT); | |
726 | } | |
727 | ||
361d93c4 | 728 | COMPAT_SYSCALL_DEFINE3(recvmsg, int, fd, struct compat_msghdr __user *, msg, unsigned int, flags) |
1da177e4 | 729 | { |
a7526eb5 AL |
730 | if (flags & MSG_CMSG_COMPAT) |
731 | return -EINVAL; | |
666547ff | 732 | return __sys_recvmsg(fd, (struct user_msghdr __user *)msg, flags | MSG_CMSG_COMPAT); |
1da177e4 LT |
733 | } |
734 | ||
3a49a0f7 | 735 | COMPAT_SYSCALL_DEFINE4(recv, int, fd, void __user *, buf, compat_size_t, len, unsigned int, flags) |
1dacc76d JB |
736 | { |
737 | return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT); | |
738 | } | |
739 | ||
3a49a0f7 HC |
740 | COMPAT_SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, buf, compat_size_t, len, |
741 | unsigned int, flags, struct sockaddr __user *, addr, | |
742 | int __user *, addrlen) | |
1dacc76d JB |
743 | { |
744 | return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen); | |
745 | } | |
746 | ||
361d93c4 HC |
747 | COMPAT_SYSCALL_DEFINE5(recvmmsg, int, fd, struct compat_mmsghdr __user *, mmsg, |
748 | unsigned int, vlen, unsigned int, flags, | |
749 | struct compat_timespec __user *, timeout) | |
a2e27255 ACM |
750 | { |
751 | int datagrams; | |
752 | struct timespec ktspec; | |
a2e27255 | 753 | |
a7526eb5 AL |
754 | if (flags & MSG_CMSG_COMPAT) |
755 | return -EINVAL; | |
756 | ||
5b23136b JMG |
757 | if (timeout == NULL) |
758 | return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, | |
759 | flags | MSG_CMSG_COMPAT, NULL); | |
760 | ||
2def2ef2 | 761 | if (compat_get_timespec(&ktspec, timeout)) |
a2e27255 ACM |
762 | return -EFAULT; |
763 | ||
764 | datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, | |
765 | flags | MSG_CMSG_COMPAT, &ktspec); | |
2def2ef2 | 766 | if (datagrams > 0 && compat_put_timespec(&ktspec, timeout)) |
a2e27255 ACM |
767 | datagrams = -EFAULT; |
768 | ||
769 | return datagrams; | |
770 | } | |
771 | ||
361d93c4 | 772 | COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user *, args) |
1da177e4 LT |
773 | { |
774 | int ret; | |
775 | u32 a[6]; | |
776 | u32 a0, a1; | |
4768fbcb | 777 | |
228e548e | 778 | if (call < SYS_SOCKET || call > SYS_SENDMMSG) |
1da177e4 LT |
779 | return -EINVAL; |
780 | if (copy_from_user(a, args, nas[call])) | |
781 | return -EFAULT; | |
782 | a0 = a[0]; | |
783 | a1 = a[1]; | |
4768fbcb | 784 | |
e71a4783 | 785 | switch (call) { |
1da177e4 LT |
786 | case SYS_SOCKET: |
787 | ret = sys_socket(a0, a1, a[2]); | |
788 | break; | |
789 | case SYS_BIND: | |
790 | ret = sys_bind(a0, compat_ptr(a1), a[2]); | |
791 | break; | |
792 | case SYS_CONNECT: | |
793 | ret = sys_connect(a0, compat_ptr(a1), a[2]); | |
794 | break; | |
795 | case SYS_LISTEN: | |
796 | ret = sys_listen(a0, a1); | |
797 | break; | |
798 | case SYS_ACCEPT: | |
de11defe | 799 | ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0); |
1da177e4 LT |
800 | break; |
801 | case SYS_GETSOCKNAME: | |
802 | ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2])); | |
803 | break; | |
804 | case SYS_GETPEERNAME: | |
805 | ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2])); | |
806 | break; | |
807 | case SYS_SOCKETPAIR: | |
808 | ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3])); | |
809 | break; | |
810 | case SYS_SEND: | |
811 | ret = sys_send(a0, compat_ptr(a1), a[2], a[3]); | |
812 | break; | |
813 | case SYS_SENDTO: | |
814 | ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]); | |
815 | break; | |
816 | case SYS_RECV: | |
1dacc76d | 817 | ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]); |
1da177e4 LT |
818 | break; |
819 | case SYS_RECVFROM: | |
1dacc76d JB |
820 | ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], |
821 | compat_ptr(a[4]), compat_ptr(a[5])); | |
1da177e4 LT |
822 | break; |
823 | case SYS_SHUTDOWN: | |
c6d409cf | 824 | ret = sys_shutdown(a0, a1); |
1da177e4 LT |
825 | break; |
826 | case SYS_SETSOCKOPT: | |
827 | ret = compat_sys_setsockopt(a0, a1, a[2], | |
828 | compat_ptr(a[3]), a[4]); | |
829 | break; | |
830 | case SYS_GETSOCKOPT: | |
831 | ret = compat_sys_getsockopt(a0, a1, a[2], | |
832 | compat_ptr(a[3]), compat_ptr(a[4])); | |
833 | break; | |
834 | case SYS_SENDMSG: | |
835 | ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]); | |
836 | break; | |
228e548e AB |
837 | case SYS_SENDMMSG: |
838 | ret = compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]); | |
839 | break; | |
1da177e4 LT |
840 | case SYS_RECVMSG: |
841 | ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]); | |
842 | break; | |
a2e27255 ACM |
843 | case SYS_RECVMMSG: |
844 | ret = compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3], | |
845 | compat_ptr(a[4])); | |
846 | break; | |
de11defe UD |
847 | case SYS_ACCEPT4: |
848 | ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]); | |
aaca0bdc | 849 | break; |
1da177e4 LT |
850 | default: |
851 | ret = -EINVAL; | |
852 | break; | |
853 | } | |
854 | return ret; | |
855 | } |