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> |
62bc306e | 25 | #include <linux/audit.h> |
bc3b2d7f | 26 | #include <linux/export.h> |
1da177e4 LT |
27 | |
28 | #include <net/scm.h> | |
29 | #include <net/sock.h> | |
dae50295 DS |
30 | #include <net/ip.h> |
31 | #include <net/ipv6.h> | |
7c0f6ba6 | 32 | #include <linux/uaccess.h> |
1da177e4 LT |
33 | #include <net/compat.h> |
34 | ||
da184284 AV |
35 | int get_compat_msghdr(struct msghdr *kmsg, |
36 | struct compat_msghdr __user *umsg, | |
37 | struct sockaddr __user **save_addr, | |
38 | struct iovec **iov) | |
1da177e4 | 39 | { |
08adb7da | 40 | compat_uptr_t uaddr, uiov, tmp3; |
c0371da6 | 41 | compat_size_t nr_segs; |
08adb7da | 42 | ssize_t err; |
1da177e4 LT |
43 | |
44 | if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) || | |
08adb7da | 45 | __get_user(uaddr, &umsg->msg_name) || |
1da177e4 | 46 | __get_user(kmsg->msg_namelen, &umsg->msg_namelen) || |
08adb7da | 47 | __get_user(uiov, &umsg->msg_iov) || |
c0371da6 | 48 | __get_user(nr_segs, &umsg->msg_iovlen) || |
1da177e4 LT |
49 | __get_user(tmp3, &umsg->msg_control) || |
50 | __get_user(kmsg->msg_controllen, &umsg->msg_controllen) || | |
51 | __get_user(kmsg->msg_flags, &umsg->msg_flags)) | |
52 | return -EFAULT; | |
91edd096 CM |
53 | |
54 | if (!uaddr) | |
55 | kmsg->msg_namelen = 0; | |
56 | ||
57 | if (kmsg->msg_namelen < 0) | |
58 | return -EINVAL; | |
59 | ||
1661bf36 | 60 | if (kmsg->msg_namelen > sizeof(struct sockaddr_storage)) |
db31c55a | 61 | kmsg->msg_namelen = sizeof(struct sockaddr_storage); |
1da177e4 | 62 | kmsg->msg_control = compat_ptr(tmp3); |
1da177e4 | 63 | |
08adb7da AV |
64 | if (save_addr) |
65 | *save_addr = compat_ptr(uaddr); | |
1da177e4 | 66 | |
08adb7da AV |
67 | if (uaddr && kmsg->msg_namelen) { |
68 | if (!save_addr) { | |
69 | err = move_addr_to_kernel(compat_ptr(uaddr), | |
70 | kmsg->msg_namelen, | |
71 | kmsg->msg_name); | |
e71a4783 | 72 | if (err < 0) |
1da177e4 LT |
73 | return err; |
74 | } | |
40eea803 | 75 | } else { |
08adb7da AV |
76 | kmsg->msg_name = NULL; |
77 | kmsg->msg_namelen = 0; | |
40eea803 | 78 | } |
1da177e4 | 79 | |
c0371da6 | 80 | if (nr_segs > UIO_MAXIOV) |
08449320 AV |
81 | return -EMSGSIZE; |
82 | ||
0345f931 | 83 | kmsg->msg_iocb = NULL; |
84 | ||
da184284 AV |
85 | return compat_import_iovec(save_addr ? READ : WRITE, |
86 | compat_ptr(uiov), nr_segs, | |
87 | UIO_FASTIOV, iov, &kmsg->msg_iter); | |
1da177e4 LT |
88 | } |
89 | ||
90 | /* Bleech... */ | |
91 | #define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32)) | |
92 | ||
93 | #define CMSG_COMPAT_DATA(cmsg) \ | |
1ff8cebf | 94 | ((void __user *)((char __user *)(cmsg) + sizeof(struct compat_cmsghdr))) |
1da177e4 | 95 | #define CMSG_COMPAT_SPACE(len) \ |
1ff8cebf | 96 | (sizeof(struct compat_cmsghdr) + CMSG_COMPAT_ALIGN(len)) |
1da177e4 | 97 | #define CMSG_COMPAT_LEN(len) \ |
1ff8cebf | 98 | (sizeof(struct compat_cmsghdr) + (len)) |
1da177e4 LT |
99 | |
100 | #define CMSG_COMPAT_FIRSTHDR(msg) \ | |
101 | (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \ | |
102 | (struct compat_cmsghdr __user *)((msg)->msg_control) : \ | |
103 | (struct compat_cmsghdr __user *)NULL) | |
104 | ||
105 | #define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \ | |
106 | ((ucmlen) >= sizeof(struct compat_cmsghdr) && \ | |
107 | (ucmlen) <= (unsigned long) \ | |
108 | ((mhdr)->msg_controllen - \ | |
109 | ((char *)(ucmsg) - (char *)(mhdr)->msg_control))) | |
110 | ||
111 | static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg, | |
112 | struct compat_cmsghdr __user *cmsg, int cmsg_len) | |
113 | { | |
114 | char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len); | |
115 | if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) > | |
116 | msg->msg_controllen) | |
117 | return NULL; | |
118 | return (struct compat_cmsghdr __user *)ptr; | |
119 | } | |
120 | ||
121 | /* There is a lot of hair here because the alignment rules (and | |
122 | * thus placement) of cmsg headers and length are different for | |
123 | * 32-bit apps. -DaveM | |
124 | */ | |
8920e8f9 | 125 | int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk, |
1da177e4 LT |
126 | unsigned char *stackbuf, int stackbuf_size) |
127 | { | |
128 | struct compat_cmsghdr __user *ucmsg; | |
129 | struct cmsghdr *kcmsg, *kcmsg_base; | |
130 | compat_size_t ucmlen; | |
131 | __kernel_size_t kcmlen, tmp; | |
8920e8f9 | 132 | int err = -EFAULT; |
1da177e4 | 133 | |
ac4340fc DM |
134 | BUILD_BUG_ON(sizeof(struct compat_cmsghdr) != |
135 | CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr))); | |
136 | ||
1da177e4 LT |
137 | kcmlen = 0; |
138 | kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf; | |
139 | ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); | |
e71a4783 SH |
140 | while (ucmsg != NULL) { |
141 | if (get_user(ucmlen, &ucmsg->cmsg_len)) | |
1da177e4 LT |
142 | return -EFAULT; |
143 | ||
144 | /* Catch bogons. */ | |
145 | if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) | |
146 | return -EINVAL; | |
147 | ||
1ff8cebf | 148 | tmp = ((ucmlen - sizeof(*ucmsg)) + sizeof(struct cmsghdr)); |
8920e8f9 | 149 | tmp = CMSG_ALIGN(tmp); |
1da177e4 LT |
150 | kcmlen += tmp; |
151 | ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); | |
152 | } | |
e71a4783 | 153 | if (kcmlen == 0) |
1da177e4 LT |
154 | return -EINVAL; |
155 | ||
156 | /* The kcmlen holds the 64-bit version of the control length. | |
157 | * It may not be modified as we do not stick it into the kmsg | |
158 | * until we have successfully copied over all of the data | |
159 | * from the user. | |
160 | */ | |
8920e8f9 AV |
161 | if (kcmlen > stackbuf_size) |
162 | kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL); | |
163 | if (kcmsg == NULL) | |
1da177e4 LT |
164 | return -ENOBUFS; |
165 | ||
166 | /* Now copy them over neatly. */ | |
167 | memset(kcmsg, 0, kcmlen); | |
168 | ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); | |
e71a4783 | 169 | while (ucmsg != NULL) { |
8920e8f9 AV |
170 | if (__get_user(ucmlen, &ucmsg->cmsg_len)) |
171 | goto Efault; | |
172 | if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) | |
173 | goto Einval; | |
1ff8cebf | 174 | tmp = ((ucmlen - sizeof(*ucmsg)) + sizeof(struct cmsghdr)); |
8920e8f9 AV |
175 | if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp)) |
176 | goto Einval; | |
1da177e4 | 177 | kcmsg->cmsg_len = tmp; |
8920e8f9 AV |
178 | tmp = CMSG_ALIGN(tmp); |
179 | if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) || | |
180 | __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) || | |
181 | copy_from_user(CMSG_DATA(kcmsg), | |
182 | CMSG_COMPAT_DATA(ucmsg), | |
1ff8cebf | 183 | (ucmlen - sizeof(*ucmsg)))) |
8920e8f9 | 184 | goto Efault; |
1da177e4 LT |
185 | |
186 | /* Advance. */ | |
8920e8f9 | 187 | kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp); |
1da177e4 LT |
188 | ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); |
189 | } | |
190 | ||
191 | /* Ok, looks like we made it. Hook it up and return success. */ | |
192 | kmsg->msg_control = kcmsg_base; | |
193 | kmsg->msg_controllen = kcmlen; | |
194 | return 0; | |
195 | ||
8920e8f9 AV |
196 | Einval: |
197 | err = -EINVAL; | |
198 | Efault: | |
199 | if (kcmsg_base != (struct cmsghdr *)stackbuf) | |
200 | sock_kfree_s(sk, kcmsg_base, kcmlen); | |
201 | return err; | |
1da177e4 LT |
202 | } |
203 | ||
204 | int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data) | |
205 | { | |
1da177e4 LT |
206 | struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; |
207 | struct compat_cmsghdr cmhdr; | |
81881047 JJ |
208 | struct compat_timeval ctv; |
209 | struct compat_timespec cts[3]; | |
1da177e4 LT |
210 | int cmlen; |
211 | ||
e71a4783 | 212 | if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) { |
1da177e4 LT |
213 | kmsg->msg_flags |= MSG_CTRUNC; |
214 | return 0; /* XXX: return error? check spec. */ | |
215 | } | |
216 | ||
ee4fa23c | 217 | if (!COMPAT_USE_64BIT_TIME) { |
ee4fa23c L |
218 | if (level == SOL_SOCKET && type == SCM_TIMESTAMP) { |
219 | struct timeval *tv = (struct timeval *)data; | |
220 | ctv.tv_sec = tv->tv_sec; | |
221 | ctv.tv_usec = tv->tv_usec; | |
222 | data = &ctv; | |
223 | len = sizeof(ctv); | |
224 | } | |
225 | if (level == SOL_SOCKET && | |
226 | (type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) { | |
227 | int count = type == SCM_TIMESTAMPNS ? 1 : 3; | |
228 | int i; | |
229 | struct timespec *ts = (struct timespec *)data; | |
230 | for (i = 0; i < count; i++) { | |
231 | cts[i].tv_sec = ts[i].tv_sec; | |
232 | cts[i].tv_nsec = ts[i].tv_nsec; | |
233 | } | |
234 | data = &cts; | |
235 | len = sizeof(cts[0]) * count; | |
20d49473 | 236 | } |
4768fbcb YH |
237 | } |
238 | ||
1da177e4 | 239 | cmlen = CMSG_COMPAT_LEN(len); |
e71a4783 | 240 | if (kmsg->msg_controllen < cmlen) { |
1da177e4 LT |
241 | kmsg->msg_flags |= MSG_CTRUNC; |
242 | cmlen = kmsg->msg_controllen; | |
243 | } | |
244 | cmhdr.cmsg_level = level; | |
245 | cmhdr.cmsg_type = type; | |
246 | cmhdr.cmsg_len = cmlen; | |
247 | ||
e71a4783 | 248 | if (copy_to_user(cm, &cmhdr, sizeof cmhdr)) |
1da177e4 | 249 | return -EFAULT; |
e71a4783 | 250 | if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr))) |
1da177e4 LT |
251 | return -EFAULT; |
252 | cmlen = CMSG_COMPAT_SPACE(len); | |
1ac70e7a WY |
253 | if (kmsg->msg_controllen < cmlen) |
254 | cmlen = kmsg->msg_controllen; | |
1da177e4 LT |
255 | kmsg->msg_control += cmlen; |
256 | kmsg->msg_controllen -= cmlen; | |
257 | return 0; | |
258 | } | |
259 | ||
260 | void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm) | |
261 | { | |
262 | struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; | |
263 | int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int); | |
264 | int fdnum = scm->fp->count; | |
265 | struct file **fp = scm->fp->fp; | |
266 | int __user *cmfptr; | |
267 | int err = 0, i; | |
268 | ||
269 | if (fdnum < fdmax) | |
270 | fdmax = fdnum; | |
271 | ||
272 | for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) { | |
273 | int new_fd; | |
274 | err = security_file_receive(fp[i]); | |
275 | if (err) | |
276 | break; | |
4a19542e UD |
277 | err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags |
278 | ? O_CLOEXEC : 0); | |
1da177e4 LT |
279 | if (err < 0) |
280 | break; | |
281 | new_fd = err; | |
282 | err = put_user(new_fd, cmfptr); | |
283 | if (err) { | |
284 | put_unused_fd(new_fd); | |
285 | break; | |
286 | } | |
287 | /* Bump the usage count and install the file. */ | |
cb0942b8 | 288 | fd_install(new_fd, get_file(fp[i])); |
1da177e4 LT |
289 | } |
290 | ||
291 | if (i > 0) { | |
292 | int cmlen = CMSG_COMPAT_LEN(i * sizeof(int)); | |
effee6a0 | 293 | err = put_user(SOL_SOCKET, &cm->cmsg_level); |
1da177e4 LT |
294 | if (!err) |
295 | err = put_user(SCM_RIGHTS, &cm->cmsg_type); | |
296 | if (!err) | |
297 | err = put_user(cmlen, &cm->cmsg_len); | |
298 | if (!err) { | |
299 | cmlen = CMSG_COMPAT_SPACE(i * sizeof(int)); | |
300 | kmsg->msg_control += cmlen; | |
301 | kmsg->msg_controllen -= cmlen; | |
302 | } | |
303 | } | |
304 | if (i < fdnum) | |
305 | kmsg->msg_flags |= MSG_CTRUNC; | |
306 | ||
307 | /* | |
308 | * All of the files that fit in the message have had their | |
309 | * usage counts incremented, so we just free the list. | |
310 | */ | |
311 | __scm_destroy(scm); | |
312 | } | |
313 | ||
719c44d3 WB |
314 | /* allocate a 64-bit sock_fprog on the user stack for duration of syscall. */ |
315 | struct sock_fprog __user *get_compat_bpf_fprog(char __user *optval) | |
1da177e4 LT |
316 | { |
317 | struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval; | |
4768fbcb | 318 | struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog)); |
1da177e4 LT |
319 | compat_uptr_t ptr; |
320 | u16 len; | |
321 | ||
322 | if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) || | |
323 | !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) || | |
324 | __get_user(len, &fprog32->len) || | |
325 | __get_user(ptr, &fprog32->filter) || | |
326 | __put_user(len, &kfprog->len) || | |
327 | __put_user(compat_ptr(ptr), &kfprog->filter)) | |
719c44d3 WB |
328 | return NULL; |
329 | ||
330 | return kfprog; | |
331 | } | |
332 | EXPORT_SYMBOL_GPL(get_compat_bpf_fprog); | |
333 | ||
334 | static int do_set_attach_filter(struct socket *sock, int level, int optname, | |
335 | char __user *optval, unsigned int optlen) | |
336 | { | |
337 | struct sock_fprog __user *kfprog; | |
338 | ||
339 | kfprog = get_compat_bpf_fprog(optval); | |
340 | if (!kfprog) | |
1da177e4 LT |
341 | return -EFAULT; |
342 | ||
3fdadf7d | 343 | return sock_setsockopt(sock, level, optname, (char __user *)kfprog, |
1da177e4 LT |
344 | sizeof(struct sock_fprog)); |
345 | } | |
346 | ||
3fdadf7d | 347 | static int do_set_sock_timeout(struct socket *sock, int level, |
b7058842 | 348 | int optname, char __user *optval, unsigned int optlen) |
1da177e4 | 349 | { |
c6d409cf | 350 | struct compat_timeval __user *up = (struct compat_timeval __user *)optval; |
1da177e4 LT |
351 | struct timeval ktime; |
352 | mm_segment_t old_fs; | |
353 | int err; | |
354 | ||
355 | if (optlen < sizeof(*up)) | |
356 | return -EINVAL; | |
357 | if (!access_ok(VERIFY_READ, up, sizeof(*up)) || | |
358 | __get_user(ktime.tv_sec, &up->tv_sec) || | |
359 | __get_user(ktime.tv_usec, &up->tv_usec)) | |
360 | return -EFAULT; | |
361 | old_fs = get_fs(); | |
362 | set_fs(KERNEL_DS); | |
c6d409cf | 363 | err = sock_setsockopt(sock, level, optname, (char *)&ktime, sizeof(ktime)); |
1da177e4 LT |
364 | set_fs(old_fs); |
365 | ||
366 | return err; | |
367 | } | |
368 | ||
3fdadf7d | 369 | static int compat_sock_setsockopt(struct socket *sock, int level, int optname, |
b7058842 | 370 | char __user *optval, unsigned int optlen) |
3fdadf7d | 371 | { |
19575988 HD |
372 | if (optname == SO_ATTACH_FILTER || |
373 | optname == SO_ATTACH_REUSEPORT_CBPF) | |
3fdadf7d DM |
374 | return do_set_attach_filter(sock, level, optname, |
375 | optval, optlen); | |
376 | if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) | |
377 | return do_set_sock_timeout(sock, level, optname, optval, optlen); | |
378 | ||
379 | return sock_setsockopt(sock, level, optname, optval, optlen); | |
380 | } | |
381 | ||
361d93c4 HC |
382 | COMPAT_SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
383 | char __user *, optval, unsigned int, optlen) | |
1da177e4 | 384 | { |
3fdadf7d | 385 | int err; |
c6d409cf | 386 | struct socket *sock = sockfd_lookup(fd, &err); |
3fdadf7d | 387 | |
c6d409cf ED |
388 | if (sock) { |
389 | err = security_socket_setsockopt(sock, level, optname); | |
3fdadf7d DM |
390 | if (err) { |
391 | sockfd_put(sock); | |
392 | return err; | |
393 | } | |
394 | ||
395 | if (level == SOL_SOCKET) | |
396 | err = compat_sock_setsockopt(sock, level, | |
397 | optname, optval, optlen); | |
398 | else if (sock->ops->compat_setsockopt) | |
399 | err = sock->ops->compat_setsockopt(sock, level, | |
400 | optname, optval, optlen); | |
401 | else | |
402 | err = sock->ops->setsockopt(sock, level, | |
403 | optname, optval, optlen); | |
404 | sockfd_put(sock); | |
405 | } | |
406 | return err; | |
1da177e4 LT |
407 | } |
408 | ||
3fdadf7d | 409 | static int do_get_sock_timeout(struct socket *sock, int level, int optname, |
1da177e4 LT |
410 | char __user *optval, int __user *optlen) |
411 | { | |
412 | struct compat_timeval __user *up; | |
413 | struct timeval ktime; | |
414 | mm_segment_t old_fs; | |
415 | int len, err; | |
416 | ||
417 | up = (struct compat_timeval __user *) optval; | |
418 | if (get_user(len, optlen)) | |
419 | return -EFAULT; | |
420 | if (len < sizeof(*up)) | |
421 | return -EINVAL; | |
422 | len = sizeof(ktime); | |
423 | old_fs = get_fs(); | |
424 | set_fs(KERNEL_DS); | |
3fdadf7d | 425 | err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len); |
1da177e4 LT |
426 | set_fs(old_fs); |
427 | ||
428 | if (!err) { | |
429 | if (put_user(sizeof(*up), optlen) || | |
430 | !access_ok(VERIFY_WRITE, up, sizeof(*up)) || | |
431 | __put_user(ktime.tv_sec, &up->tv_sec) || | |
432 | __put_user(ktime.tv_usec, &up->tv_usec)) | |
433 | err = -EFAULT; | |
434 | } | |
435 | return err; | |
436 | } | |
437 | ||
3fdadf7d | 438 | static int compat_sock_getsockopt(struct socket *sock, int level, int optname, |
1da177e4 LT |
439 | char __user *optval, int __user *optlen) |
440 | { | |
3fdadf7d DM |
441 | if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) |
442 | return do_get_sock_timeout(sock, level, optname, optval, optlen); | |
443 | return sock_getsockopt(sock, level, optname, optval, optlen); | |
1da177e4 LT |
444 | } |
445 | ||
f0ac2614 SP |
446 | int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp) |
447 | { | |
ee4fa23c L |
448 | struct compat_timeval __user *ctv; |
449 | int err; | |
b7aa0bf7 | 450 | struct timeval tv; |
f0ac2614 | 451 | |
ee4fa23c L |
452 | if (COMPAT_USE_64BIT_TIME) |
453 | return sock_get_timestamp(sk, userstamp); | |
454 | ||
455 | ctv = (struct compat_timeval __user *) userstamp; | |
456 | err = -ENOENT; | |
f0ac2614 | 457 | if (!sock_flag(sk, SOCK_TIMESTAMP)) |
20d49473 | 458 | sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
b7aa0bf7 ED |
459 | tv = ktime_to_timeval(sk->sk_stamp); |
460 | if (tv.tv_sec == -1) | |
f0ac2614 | 461 | return err; |
b7aa0bf7 ED |
462 | if (tv.tv_sec == 0) { |
463 | sk->sk_stamp = ktime_get_real(); | |
464 | tv = ktime_to_timeval(sk->sk_stamp); | |
465 | } | |
466 | err = 0; | |
467 | if (put_user(tv.tv_sec, &ctv->tv_sec) || | |
468 | put_user(tv.tv_usec, &ctv->tv_usec)) | |
f0ac2614 SP |
469 | err = -EFAULT; |
470 | return err; | |
471 | } | |
472 | EXPORT_SYMBOL(compat_sock_get_timestamp); | |
473 | ||
ae40eb1e ED |
474 | int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp) |
475 | { | |
ee4fa23c L |
476 | struct compat_timespec __user *ctv; |
477 | int err; | |
ae40eb1e ED |
478 | struct timespec ts; |
479 | ||
ee4fa23c L |
480 | if (COMPAT_USE_64BIT_TIME) |
481 | return sock_get_timestampns (sk, userstamp); | |
482 | ||
483 | ctv = (struct compat_timespec __user *) userstamp; | |
484 | err = -ENOENT; | |
ae40eb1e | 485 | if (!sock_flag(sk, SOCK_TIMESTAMP)) |
20d49473 | 486 | sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
ae40eb1e ED |
487 | ts = ktime_to_timespec(sk->sk_stamp); |
488 | if (ts.tv_sec == -1) | |
489 | return err; | |
490 | if (ts.tv_sec == 0) { | |
491 | sk->sk_stamp = ktime_get_real(); | |
492 | ts = ktime_to_timespec(sk->sk_stamp); | |
493 | } | |
494 | err = 0; | |
495 | if (put_user(ts.tv_sec, &ctv->tv_sec) || | |
496 | put_user(ts.tv_nsec, &ctv->tv_nsec)) | |
497 | err = -EFAULT; | |
498 | return err; | |
499 | } | |
500 | EXPORT_SYMBOL(compat_sock_get_timestampns); | |
501 | ||
361d93c4 HC |
502 | COMPAT_SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
503 | char __user *, optval, int __user *, optlen) | |
3fdadf7d DM |
504 | { |
505 | int err; | |
c6d409cf | 506 | struct socket *sock = sockfd_lookup(fd, &err); |
3fdadf7d | 507 | |
c6d409cf ED |
508 | if (sock) { |
509 | err = security_socket_getsockopt(sock, level, optname); | |
3fdadf7d DM |
510 | if (err) { |
511 | sockfd_put(sock); | |
512 | return err; | |
513 | } | |
514 | ||
515 | if (level == SOL_SOCKET) | |
516 | err = compat_sock_getsockopt(sock, level, | |
517 | optname, optval, optlen); | |
518 | else if (sock->ops->compat_getsockopt) | |
519 | err = sock->ops->compat_getsockopt(sock, level, | |
520 | optname, optval, optlen); | |
521 | else | |
522 | err = sock->ops->getsockopt(sock, level, | |
523 | optname, optval, optlen); | |
524 | sockfd_put(sock); | |
525 | } | |
526 | return err; | |
527 | } | |
dae50295 DS |
528 | |
529 | struct compat_group_req { | |
530 | __u32 gr_interface; | |
531 | struct __kernel_sockaddr_storage gr_group | |
e099b2d9 | 532 | __aligned(4); |
bc10502d | 533 | } __packed; |
dae50295 DS |
534 | |
535 | struct compat_group_source_req { | |
536 | __u32 gsr_interface; | |
537 | struct __kernel_sockaddr_storage gsr_group | |
e099b2d9 | 538 | __aligned(4); |
dae50295 | 539 | struct __kernel_sockaddr_storage gsr_source |
e099b2d9 | 540 | __aligned(4); |
bc10502d | 541 | } __packed; |
dae50295 DS |
542 | |
543 | struct compat_group_filter { | |
544 | __u32 gf_interface; | |
545 | struct __kernel_sockaddr_storage gf_group | |
e099b2d9 | 546 | __aligned(4); |
dae50295 DS |
547 | __u32 gf_fmode; |
548 | __u32 gf_numsrc; | |
549 | struct __kernel_sockaddr_storage gf_slist[1] | |
e099b2d9 | 550 | __aligned(4); |
bc10502d | 551 | } __packed; |
dae50295 | 552 | |
be666e0a DS |
553 | #define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \ |
554 | sizeof(struct __kernel_sockaddr_storage)) | |
555 | ||
dae50295 DS |
556 | |
557 | int compat_mc_setsockopt(struct sock *sock, int level, int optname, | |
b7058842 | 558 | char __user *optval, unsigned int optlen, |
c6d409cf | 559 | int (*setsockopt)(struct sock *, int, int, char __user *, unsigned int)) |
dae50295 DS |
560 | { |
561 | char __user *koptval = optval; | |
562 | int koptlen = optlen; | |
563 | ||
564 | switch (optname) { | |
565 | case MCAST_JOIN_GROUP: | |
566 | case MCAST_LEAVE_GROUP: | |
567 | { | |
568 | struct compat_group_req __user *gr32 = (void *)optval; | |
569 | struct group_req __user *kgr = | |
570 | compat_alloc_user_space(sizeof(struct group_req)); | |
571 | u32 interface; | |
572 | ||
573 | if (!access_ok(VERIFY_READ, gr32, sizeof(*gr32)) || | |
574 | !access_ok(VERIFY_WRITE, kgr, sizeof(struct group_req)) || | |
575 | __get_user(interface, &gr32->gr_interface) || | |
576 | __put_user(interface, &kgr->gr_interface) || | |
577 | copy_in_user(&kgr->gr_group, &gr32->gr_group, | |
578 | sizeof(kgr->gr_group))) | |
579 | return -EFAULT; | |
580 | koptval = (char __user *)kgr; | |
581 | koptlen = sizeof(struct group_req); | |
582 | break; | |
583 | } | |
584 | case MCAST_JOIN_SOURCE_GROUP: | |
585 | case MCAST_LEAVE_SOURCE_GROUP: | |
586 | case MCAST_BLOCK_SOURCE: | |
587 | case MCAST_UNBLOCK_SOURCE: | |
588 | { | |
589 | struct compat_group_source_req __user *gsr32 = (void *)optval; | |
be666e0a | 590 | struct group_source_req __user *kgsr = compat_alloc_user_space( |
dae50295 DS |
591 | sizeof(struct group_source_req)); |
592 | u32 interface; | |
593 | ||
594 | if (!access_ok(VERIFY_READ, gsr32, sizeof(*gsr32)) || | |
595 | !access_ok(VERIFY_WRITE, kgsr, | |
596 | sizeof(struct group_source_req)) || | |
597 | __get_user(interface, &gsr32->gsr_interface) || | |
598 | __put_user(interface, &kgsr->gsr_interface) || | |
599 | copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group, | |
600 | sizeof(kgsr->gsr_group)) || | |
601 | copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source, | |
602 | sizeof(kgsr->gsr_source))) | |
603 | return -EFAULT; | |
604 | koptval = (char __user *)kgsr; | |
605 | koptlen = sizeof(struct group_source_req); | |
606 | break; | |
607 | } | |
608 | case MCAST_MSFILTER: | |
609 | { | |
610 | struct compat_group_filter __user *gf32 = (void *)optval; | |
be666e0a | 611 | struct group_filter __user *kgf; |
dae50295 DS |
612 | u32 interface, fmode, numsrc; |
613 | ||
be666e0a | 614 | if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || |
dae50295 DS |
615 | __get_user(interface, &gf32->gf_interface) || |
616 | __get_user(fmode, &gf32->gf_fmode) || | |
617 | __get_user(numsrc, &gf32->gf_numsrc)) | |
618 | return -EFAULT; | |
619 | koptlen = optlen + sizeof(struct group_filter) - | |
620 | sizeof(struct compat_group_filter); | |
621 | if (koptlen < GROUP_FILTER_SIZE(numsrc)) | |
622 | return -EINVAL; | |
623 | kgf = compat_alloc_user_space(koptlen); | |
624 | if (!access_ok(VERIFY_WRITE, kgf, koptlen) || | |
625 | __put_user(interface, &kgf->gf_interface) || | |
626 | __put_user(fmode, &kgf->gf_fmode) || | |
627 | __put_user(numsrc, &kgf->gf_numsrc) || | |
628 | copy_in_user(&kgf->gf_group, &gf32->gf_group, | |
629 | sizeof(kgf->gf_group)) || | |
be666e0a | 630 | (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist, |
dae50295 DS |
631 | numsrc * sizeof(kgf->gf_slist[0])))) |
632 | return -EFAULT; | |
633 | koptval = (char __user *)kgf; | |
634 | break; | |
635 | } | |
636 | ||
637 | default: | |
638 | break; | |
639 | } | |
640 | return setsockopt(sock, level, optname, koptval, koptlen); | |
641 | } | |
dae50295 DS |
642 | EXPORT_SYMBOL(compat_mc_setsockopt); |
643 | ||
42908c69 DS |
644 | int compat_mc_getsockopt(struct sock *sock, int level, int optname, |
645 | char __user *optval, int __user *optlen, | |
c6d409cf | 646 | int (*getsockopt)(struct sock *, int, int, char __user *, int __user *)) |
42908c69 DS |
647 | { |
648 | struct compat_group_filter __user *gf32 = (void *)optval; | |
649 | struct group_filter __user *kgf; | |
650 | int __user *koptlen; | |
651 | u32 interface, fmode, numsrc; | |
652 | int klen, ulen, err; | |
653 | ||
654 | if (optname != MCAST_MSFILTER) | |
655 | return getsockopt(sock, level, optname, optval, optlen); | |
656 | ||
657 | koptlen = compat_alloc_user_space(sizeof(*koptlen)); | |
658 | if (!access_ok(VERIFY_READ, optlen, sizeof(*optlen)) || | |
659 | __get_user(ulen, optlen)) | |
660 | return -EFAULT; | |
661 | ||
662 | /* adjust len for pad */ | |
663 | klen = ulen + sizeof(*kgf) - sizeof(*gf32); | |
664 | ||
665 | if (klen < GROUP_FILTER_SIZE(0)) | |
666 | return -EINVAL; | |
667 | ||
668 | if (!access_ok(VERIFY_WRITE, koptlen, sizeof(*koptlen)) || | |
669 | __put_user(klen, koptlen)) | |
670 | return -EFAULT; | |
671 | ||
672 | /* have to allow space for previous compat_alloc_user_space, too */ | |
673 | kgf = compat_alloc_user_space(klen+sizeof(*optlen)); | |
674 | ||
675 | if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || | |
676 | __get_user(interface, &gf32->gf_interface) || | |
677 | __get_user(fmode, &gf32->gf_fmode) || | |
678 | __get_user(numsrc, &gf32->gf_numsrc) || | |
679 | __put_user(interface, &kgf->gf_interface) || | |
680 | __put_user(fmode, &kgf->gf_fmode) || | |
681 | __put_user(numsrc, &kgf->gf_numsrc) || | |
c6d409cf | 682 | copy_in_user(&kgf->gf_group, &gf32->gf_group, sizeof(kgf->gf_group))) |
42908c69 DS |
683 | return -EFAULT; |
684 | ||
685 | err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen); | |
686 | if (err) | |
687 | return err; | |
688 | ||
689 | if (!access_ok(VERIFY_READ, koptlen, sizeof(*koptlen)) || | |
690 | __get_user(klen, koptlen)) | |
691 | return -EFAULT; | |
692 | ||
693 | ulen = klen - (sizeof(*kgf)-sizeof(*gf32)); | |
694 | ||
695 | if (!access_ok(VERIFY_WRITE, optlen, sizeof(*optlen)) || | |
696 | __put_user(ulen, optlen)) | |
697 | return -EFAULT; | |
698 | ||
699 | if (!access_ok(VERIFY_READ, kgf, klen) || | |
700 | !access_ok(VERIFY_WRITE, gf32, ulen) || | |
701 | __get_user(interface, &kgf->gf_interface) || | |
702 | __get_user(fmode, &kgf->gf_fmode) || | |
703 | __get_user(numsrc, &kgf->gf_numsrc) || | |
704 | __put_user(interface, &gf32->gf_interface) || | |
705 | __put_user(fmode, &gf32->gf_fmode) || | |
706 | __put_user(numsrc, &gf32->gf_numsrc)) | |
707 | return -EFAULT; | |
708 | if (numsrc) { | |
709 | int copylen; | |
710 | ||
711 | klen -= GROUP_FILTER_SIZE(0); | |
712 | copylen = numsrc * sizeof(gf32->gf_slist[0]); | |
713 | if (copylen > klen) | |
714 | copylen = klen; | |
c6d409cf | 715 | if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen)) |
42908c69 DS |
716 | return -EFAULT; |
717 | } | |
718 | return err; | |
719 | } | |
42908c69 DS |
720 | EXPORT_SYMBOL(compat_mc_getsockopt); |
721 | ||
dae50295 | 722 | |
1da177e4 LT |
723 | /* Argument list sizes for compat_sys_socketcall */ |
724 | #define AL(x) ((x) * sizeof(u32)) | |
228e548e | 725 | static unsigned char nas[21] = { |
c6d409cf ED |
726 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
727 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), | |
728 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), | |
228e548e | 729 | AL(4), AL(5), AL(4) |
c6d409cf | 730 | }; |
1da177e4 LT |
731 | #undef AL |
732 | ||
361d93c4 | 733 | COMPAT_SYSCALL_DEFINE3(sendmsg, int, fd, struct compat_msghdr __user *, msg, unsigned int, flags) |
1da177e4 | 734 | { |
666547ff | 735 | return __sys_sendmsg(fd, (struct user_msghdr __user *)msg, flags | MSG_CMSG_COMPAT); |
1da177e4 LT |
736 | } |
737 | ||
361d93c4 HC |
738 | COMPAT_SYSCALL_DEFINE4(sendmmsg, int, fd, struct compat_mmsghdr __user *, mmsg, |
739 | unsigned int, vlen, unsigned int, flags) | |
228e548e AB |
740 | { |
741 | return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, | |
742 | flags | MSG_CMSG_COMPAT); | |
743 | } | |
744 | ||
361d93c4 | 745 | COMPAT_SYSCALL_DEFINE3(recvmsg, int, fd, struct compat_msghdr __user *, msg, unsigned int, flags) |
1da177e4 | 746 | { |
666547ff | 747 | return __sys_recvmsg(fd, (struct user_msghdr __user *)msg, flags | MSG_CMSG_COMPAT); |
1da177e4 LT |
748 | } |
749 | ||
3a49a0f7 | 750 | COMPAT_SYSCALL_DEFINE4(recv, int, fd, void __user *, buf, compat_size_t, len, unsigned int, flags) |
1dacc76d JB |
751 | { |
752 | return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT); | |
753 | } | |
754 | ||
3a49a0f7 HC |
755 | COMPAT_SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, buf, compat_size_t, len, |
756 | unsigned int, flags, struct sockaddr __user *, addr, | |
757 | int __user *, addrlen) | |
1dacc76d JB |
758 | { |
759 | return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen); | |
760 | } | |
761 | ||
361d93c4 HC |
762 | COMPAT_SYSCALL_DEFINE5(recvmmsg, int, fd, struct compat_mmsghdr __user *, mmsg, |
763 | unsigned int, vlen, unsigned int, flags, | |
764 | struct compat_timespec __user *, timeout) | |
a2e27255 ACM |
765 | { |
766 | int datagrams; | |
767 | struct timespec ktspec; | |
a2e27255 | 768 | |
5b23136b JMG |
769 | if (timeout == NULL) |
770 | return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, | |
771 | flags | MSG_CMSG_COMPAT, NULL); | |
772 | ||
2def2ef2 | 773 | if (compat_get_timespec(&ktspec, timeout)) |
a2e27255 ACM |
774 | return -EFAULT; |
775 | ||
776 | datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, | |
777 | flags | MSG_CMSG_COMPAT, &ktspec); | |
2def2ef2 | 778 | if (datagrams > 0 && compat_put_timespec(&ktspec, timeout)) |
a2e27255 ACM |
779 | datagrams = -EFAULT; |
780 | ||
781 | return datagrams; | |
782 | } | |
783 | ||
361d93c4 | 784 | COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user *, args) |
1da177e4 | 785 | { |
62bc306e RGB |
786 | u32 a[AUDITSC_ARGS]; |
787 | unsigned int len; | |
1da177e4 | 788 | u32 a0, a1; |
62bc306e | 789 | int ret; |
4768fbcb | 790 | |
228e548e | 791 | if (call < SYS_SOCKET || call > SYS_SENDMMSG) |
1da177e4 | 792 | return -EINVAL; |
62bc306e RGB |
793 | len = nas[call]; |
794 | if (len > sizeof(a)) | |
795 | return -EINVAL; | |
796 | ||
797 | if (copy_from_user(a, args, len)) | |
1da177e4 | 798 | return -EFAULT; |
62bc306e RGB |
799 | |
800 | ret = audit_socketcall_compat(len / sizeof(a[0]), a); | |
801 | if (ret) | |
802 | return ret; | |
803 | ||
1da177e4 LT |
804 | a0 = a[0]; |
805 | a1 = a[1]; | |
4768fbcb | 806 | |
e71a4783 | 807 | switch (call) { |
1da177e4 LT |
808 | case SYS_SOCKET: |
809 | ret = sys_socket(a0, a1, a[2]); | |
810 | break; | |
811 | case SYS_BIND: | |
812 | ret = sys_bind(a0, compat_ptr(a1), a[2]); | |
813 | break; | |
814 | case SYS_CONNECT: | |
815 | ret = sys_connect(a0, compat_ptr(a1), a[2]); | |
816 | break; | |
817 | case SYS_LISTEN: | |
818 | ret = sys_listen(a0, a1); | |
819 | break; | |
820 | case SYS_ACCEPT: | |
de11defe | 821 | ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0); |
1da177e4 LT |
822 | break; |
823 | case SYS_GETSOCKNAME: | |
824 | ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2])); | |
825 | break; | |
826 | case SYS_GETPEERNAME: | |
827 | ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2])); | |
828 | break; | |
829 | case SYS_SOCKETPAIR: | |
830 | ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3])); | |
831 | break; | |
832 | case SYS_SEND: | |
833 | ret = sys_send(a0, compat_ptr(a1), a[2], a[3]); | |
834 | break; | |
835 | case SYS_SENDTO: | |
836 | ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]); | |
837 | break; | |
838 | case SYS_RECV: | |
1dacc76d | 839 | ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]); |
1da177e4 LT |
840 | break; |
841 | case SYS_RECVFROM: | |
1dacc76d JB |
842 | ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], |
843 | compat_ptr(a[4]), compat_ptr(a[5])); | |
1da177e4 LT |
844 | break; |
845 | case SYS_SHUTDOWN: | |
c6d409cf | 846 | ret = sys_shutdown(a0, a1); |
1da177e4 LT |
847 | break; |
848 | case SYS_SETSOCKOPT: | |
849 | ret = compat_sys_setsockopt(a0, a1, a[2], | |
850 | compat_ptr(a[3]), a[4]); | |
851 | break; | |
852 | case SYS_GETSOCKOPT: | |
853 | ret = compat_sys_getsockopt(a0, a1, a[2], | |
854 | compat_ptr(a[3]), compat_ptr(a[4])); | |
855 | break; | |
856 | case SYS_SENDMSG: | |
857 | ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]); | |
858 | break; | |
228e548e AB |
859 | case SYS_SENDMMSG: |
860 | ret = compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]); | |
861 | break; | |
1da177e4 LT |
862 | case SYS_RECVMSG: |
863 | ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]); | |
864 | break; | |
a2e27255 ACM |
865 | case SYS_RECVMMSG: |
866 | ret = compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3], | |
867 | compat_ptr(a[4])); | |
868 | break; | |
de11defe UD |
869 | case SYS_ACCEPT4: |
870 | ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]); | |
aaca0bdc | 871 | break; |
1da177e4 LT |
872 | default: |
873 | ret = -EINVAL; | |
874 | break; | |
875 | } | |
876 | return ret; | |
877 | } |