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