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1 | /* |
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> |
11 | * Copyright (C) 2000,2001 Andi Kleen, SuSE Labs |
12 | */ |
13 | |
14 | #include <linux/kernel.h> |
15 | #include <linux/gfp.h> |
16 | #include <linux/fs.h> |
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> |
24 | #include <linux/security.h> |
25 | #include <linux/export.h> |
26 | |
27 | #include <net/scm.h> |
28 | #include <net/sock.h> |
29 | #include <net/ip.h> |
30 | #include <net/ipv6.h> |
31 | #include <asm/uaccess.h> |
32 | #include <net/compat.h> |
33 | |
34 | static inline int iov_from_user_compat_to_kern(struct iovec *kiov, |
35 | struct compat_iovec __user *uiov32, |
36 | int niov) |
37 | { |
38 | int tot_len = 0; |
39 | |
40 | while (niov > 0) { |
41 | compat_uptr_t buf; |
42 | compat_size_t len; |
43 | |
44 | if (get_user(len, &uiov32->iov_len) || |
45 | get_user(buf, &uiov32->iov_base)) |
46 | return -EFAULT; |
47 | |
48 | if (len > INT_MAX - tot_len) |
49 | len = INT_MAX - tot_len; |
50 | |
51 | tot_len += len; |
52 | kiov->iov_base = compat_ptr(buf); |
53 | kiov->iov_len = (__kernel_size_t) len; |
54 | uiov32++; |
55 | kiov++; |
56 | niov--; |
57 | } |
58 | return tot_len; |
59 | } |
60 | |
61 | int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg) |
62 | { |
63 | compat_uptr_t tmp1, tmp2, tmp3; |
64 | |
65 | if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) || |
66 | __get_user(tmp1, &umsg->msg_name) || |
67 | __get_user(kmsg->msg_namelen, &umsg->msg_namelen) || |
68 | __get_user(tmp2, &umsg->msg_iov) || |
69 | __get_user(kmsg->msg_iovlen, &umsg->msg_iovlen) || |
70 | __get_user(tmp3, &umsg->msg_control) || |
71 | __get_user(kmsg->msg_controllen, &umsg->msg_controllen) || |
72 | __get_user(kmsg->msg_flags, &umsg->msg_flags)) |
73 | return -EFAULT; |
74 | kmsg->msg_name = compat_ptr(tmp1); |
75 | kmsg->msg_iov = compat_ptr(tmp2); |
76 | kmsg->msg_control = compat_ptr(tmp3); |
77 | return 0; |
78 | } |
79 | |
80 | /* I've named the args so it is easy to tell whose space the pointers are in. */ |
81 | int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov, |
82 | struct sockaddr *kern_address, int mode) |
83 | { |
84 | int tot_len; |
85 | |
86 | if (kern_msg->msg_namelen) { |
87 | if (mode == VERIFY_READ) { |
88 | int err = move_addr_to_kernel(kern_msg->msg_name, |
89 | kern_msg->msg_namelen, |
90 | kern_address); |
91 | if (err < 0) |
92 | return err; |
93 | } |
94 | kern_msg->msg_name = kern_address; |
95 | } else |
96 | kern_msg->msg_name = NULL; |
97 | |
98 | tot_len = iov_from_user_compat_to_kern(kern_iov, |
99 | (struct compat_iovec __user *)kern_msg->msg_iov, |
100 | kern_msg->msg_iovlen); |
101 | if (tot_len >= 0) |
102 | kern_msg->msg_iov = kern_iov; |
103 | |
104 | return tot_len; |
105 | } |
106 | |
107 | /* Bleech... */ |
108 | #define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32)) |
109 | |
110 | #define CMSG_COMPAT_DATA(cmsg) \ |
111 | ((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)))) |
112 | #define CMSG_COMPAT_SPACE(len) \ |
113 | (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len)) |
114 | #define CMSG_COMPAT_LEN(len) \ |
115 | (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len)) |
116 | |
117 | #define CMSG_COMPAT_FIRSTHDR(msg) \ |
118 | (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \ |
119 | (struct compat_cmsghdr __user *)((msg)->msg_control) : \ |
120 | (struct compat_cmsghdr __user *)NULL) |
121 | |
122 | #define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \ |
123 | ((ucmlen) >= sizeof(struct compat_cmsghdr) && \ |
124 | (ucmlen) <= (unsigned long) \ |
125 | ((mhdr)->msg_controllen - \ |
126 | ((char *)(ucmsg) - (char *)(mhdr)->msg_control))) |
127 | |
128 | static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg, |
129 | struct compat_cmsghdr __user *cmsg, int cmsg_len) |
130 | { |
131 | char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len); |
132 | if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) > |
133 | msg->msg_controllen) |
134 | return NULL; |
135 | return (struct compat_cmsghdr __user *)ptr; |
136 | } |
137 | |
138 | /* There is a lot of hair here because the alignment rules (and |
139 | * thus placement) of cmsg headers and length are different for |
140 | * 32-bit apps. -DaveM |
141 | */ |
142 | int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk, |
143 | unsigned char *stackbuf, int stackbuf_size) |
144 | { |
145 | struct compat_cmsghdr __user *ucmsg; |
146 | struct cmsghdr *kcmsg, *kcmsg_base; |
147 | compat_size_t ucmlen; |
148 | __kernel_size_t kcmlen, tmp; |
149 | int err = -EFAULT; |
150 | |
151 | kcmlen = 0; |
152 | kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf; |
153 | ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); |
154 | while (ucmsg != NULL) { |
155 | if (get_user(ucmlen, &ucmsg->cmsg_len)) |
156 | return -EFAULT; |
157 | |
158 | /* Catch bogons. */ |
159 | if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) |
160 | return -EINVAL; |
161 | |
162 | tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + |
163 | CMSG_ALIGN(sizeof(struct cmsghdr))); |
164 | tmp = CMSG_ALIGN(tmp); |
165 | kcmlen += tmp; |
166 | ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); |
167 | } |
168 | if (kcmlen == 0) |
169 | return -EINVAL; |
170 | |
171 | /* The kcmlen holds the 64-bit version of the control length. |
172 | * It may not be modified as we do not stick it into the kmsg |
173 | * until we have successfully copied over all of the data |
174 | * from the user. |
175 | */ |
176 | if (kcmlen > stackbuf_size) |
177 | kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL); |
178 | if (kcmsg == NULL) |
179 | return -ENOBUFS; |
180 | |
181 | /* Now copy them over neatly. */ |
182 | memset(kcmsg, 0, kcmlen); |
183 | ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); |
184 | while (ucmsg != NULL) { |
185 | if (__get_user(ucmlen, &ucmsg->cmsg_len)) |
186 | goto Efault; |
187 | if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) |
188 | goto Einval; |
189 | tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + |
190 | CMSG_ALIGN(sizeof(struct cmsghdr))); |
191 | if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp)) |
192 | goto Einval; |
193 | kcmsg->cmsg_len = tmp; |
194 | tmp = CMSG_ALIGN(tmp); |
195 | if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) || |
196 | __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) || |
197 | copy_from_user(CMSG_DATA(kcmsg), |
198 | CMSG_COMPAT_DATA(ucmsg), |
199 | (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))))) |
200 | goto Efault; |
201 | |
202 | /* Advance. */ |
203 | kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp); |
204 | ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); |
205 | } |
206 | |
207 | /* Ok, looks like we made it. Hook it up and return success. */ |
208 | kmsg->msg_control = kcmsg_base; |
209 | kmsg->msg_controllen = kcmlen; |
210 | return 0; |
211 | |
212 | Einval: |
213 | err = -EINVAL; |
214 | Efault: |
215 | if (kcmsg_base != (struct cmsghdr *)stackbuf) |
216 | sock_kfree_s(sk, kcmsg_base, kcmlen); |
217 | return err; |
218 | } |
219 | |
220 | int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data) |
221 | { |
222 | struct compat_timeval ctv; |
223 | struct compat_timespec cts[3]; |
224 | struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; |
225 | struct compat_cmsghdr cmhdr; |
226 | int cmlen; |
227 | |
228 | if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) { |
229 | kmsg->msg_flags |= MSG_CTRUNC; |
230 | return 0; /* XXX: return error? check spec. */ |
231 | } |
232 | |
233 | if (level == SOL_SOCKET && type == SCM_TIMESTAMP) { |
234 | struct timeval *tv = (struct timeval *)data; |
235 | ctv.tv_sec = tv->tv_sec; |
236 | ctv.tv_usec = tv->tv_usec; |
237 | data = &ctv; |
238 | len = sizeof(ctv); |
239 | } |
240 | if (level == SOL_SOCKET && |
241 | (type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) { |
242 | int count = type == SCM_TIMESTAMPNS ? 1 : 3; |
243 | int i; |
244 | struct timespec *ts = (struct timespec *)data; |
245 | for (i = 0; i < count; i++) { |
246 | cts[i].tv_sec = ts[i].tv_sec; |
247 | cts[i].tv_nsec = ts[i].tv_nsec; |
248 | } |
249 | data = &cts; |
250 | len = sizeof(cts[0]) * count; |
251 | } |
252 | |
253 | cmlen = CMSG_COMPAT_LEN(len); |
254 | if (kmsg->msg_controllen < cmlen) { |
255 | kmsg->msg_flags |= MSG_CTRUNC; |
256 | cmlen = kmsg->msg_controllen; |
257 | } |
258 | cmhdr.cmsg_level = level; |
259 | cmhdr.cmsg_type = type; |
260 | cmhdr.cmsg_len = cmlen; |
261 | |
262 | if (copy_to_user(cm, &cmhdr, sizeof cmhdr)) |
263 | return -EFAULT; |
264 | if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr))) |
265 | return -EFAULT; |
266 | cmlen = CMSG_COMPAT_SPACE(len); |
267 | if (kmsg->msg_controllen < cmlen) |
268 | cmlen = kmsg->msg_controllen; |
269 | kmsg->msg_control += cmlen; |
270 | kmsg->msg_controllen -= cmlen; |
271 | return 0; |
272 | } |
273 | |
274 | void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm) |
275 | { |
276 | struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; |
277 | int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int); |
278 | int fdnum = scm->fp->count; |
279 | struct file **fp = scm->fp->fp; |
280 | int __user *cmfptr; |
281 | int err = 0, i; |
282 | |
283 | if (fdnum < fdmax) |
284 | fdmax = fdnum; |
285 | |
286 | for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) { |
287 | int new_fd; |
288 | err = security_file_receive(fp[i]); |
289 | if (err) |
290 | break; |
291 | err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags |
292 | ? O_CLOEXEC : 0); |
293 | if (err < 0) |
294 | break; |
295 | new_fd = err; |
296 | err = put_user(new_fd, cmfptr); |
297 | if (err) { |
298 | put_unused_fd(new_fd); |
299 | break; |
300 | } |
301 | /* Bump the usage count and install the file. */ |
302 | get_file(fp[i]); |
303 | fd_install(new_fd, fp[i]); |
304 | } |
305 | |
306 | if (i > 0) { |
307 | int cmlen = CMSG_COMPAT_LEN(i * sizeof(int)); |
308 | err = put_user(SOL_SOCKET, &cm->cmsg_level); |
309 | if (!err) |
310 | err = put_user(SCM_RIGHTS, &cm->cmsg_type); |
311 | if (!err) |
312 | err = put_user(cmlen, &cm->cmsg_len); |
313 | if (!err) { |
314 | cmlen = CMSG_COMPAT_SPACE(i * sizeof(int)); |
315 | kmsg->msg_control += cmlen; |
316 | kmsg->msg_controllen -= cmlen; |
317 | } |
318 | } |
319 | if (i < fdnum) |
320 | kmsg->msg_flags |= MSG_CTRUNC; |
321 | |
322 | /* |
323 | * All of the files that fit in the message have had their |
324 | * usage counts incremented, so we just free the list. |
325 | */ |
326 | __scm_destroy(scm); |
327 | } |
328 | |
329 | /* |
330 | * A struct sock_filter is architecture independent. |
331 | */ |
332 | struct compat_sock_fprog { |
333 | u16 len; |
334 | compat_uptr_t filter; /* struct sock_filter * */ |
335 | }; |
336 | |
337 | static int do_set_attach_filter(struct socket *sock, int level, int optname, |
338 | char __user *optval, unsigned int optlen) |
339 | { |
340 | struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval; |
341 | struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog)); |
342 | compat_uptr_t ptr; |
343 | u16 len; |
344 | |
345 | if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) || |
346 | !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) || |
347 | __get_user(len, &fprog32->len) || |
348 | __get_user(ptr, &fprog32->filter) || |
349 | __put_user(len, &kfprog->len) || |
350 | __put_user(compat_ptr(ptr), &kfprog->filter)) |
351 | return -EFAULT; |
352 | |
353 | return sock_setsockopt(sock, level, optname, (char __user *)kfprog, |
354 | sizeof(struct sock_fprog)); |
355 | } |
356 | |
357 | static int do_set_sock_timeout(struct socket *sock, int level, |
358 | int optname, char __user *optval, unsigned int optlen) |
359 | { |
360 | struct compat_timeval __user *up = (struct compat_timeval __user *)optval; |
361 | struct timeval ktime; |
362 | mm_segment_t old_fs; |
363 | int err; |
364 | |
365 | if (optlen < sizeof(*up)) |
366 | return -EINVAL; |
367 | if (!access_ok(VERIFY_READ, up, sizeof(*up)) || |
368 | __get_user(ktime.tv_sec, &up->tv_sec) || |
369 | __get_user(ktime.tv_usec, &up->tv_usec)) |
370 | return -EFAULT; |
371 | old_fs = get_fs(); |
372 | set_fs(KERNEL_DS); |
373 | err = sock_setsockopt(sock, level, optname, (char *)&ktime, sizeof(ktime)); |
374 | set_fs(old_fs); |
375 | |
376 | return err; |
377 | } |
378 | |
379 | static int compat_sock_setsockopt(struct socket *sock, int level, int optname, |
380 | char __user *optval, unsigned int optlen) |
381 | { |
382 | if (optname == SO_ATTACH_FILTER) |
383 | return do_set_attach_filter(sock, level, optname, |
384 | optval, optlen); |
385 | if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) |
386 | return do_set_sock_timeout(sock, level, optname, optval, optlen); |
387 | |
388 | return sock_setsockopt(sock, level, optname, optval, optlen); |
389 | } |
390 | |
391 | asmlinkage long compat_sys_setsockopt(int fd, int level, int optname, |
392 | char __user *optval, unsigned int optlen) |
393 | { |
394 | int err; |
395 | struct socket *sock = sockfd_lookup(fd, &err); |
396 | |
397 | if (sock) { |
398 | err = security_socket_setsockopt(sock, level, optname); |
399 | if (err) { |
400 | sockfd_put(sock); |
401 | return err; |
402 | } |
403 | |
404 | if (level == SOL_SOCKET) |
405 | err = compat_sock_setsockopt(sock, level, |
406 | optname, optval, optlen); |
407 | else if (sock->ops->compat_setsockopt) |
408 | err = sock->ops->compat_setsockopt(sock, level, |
409 | optname, optval, optlen); |
410 | else |
411 | err = sock->ops->setsockopt(sock, level, |
412 | optname, optval, optlen); |
413 | sockfd_put(sock); |
414 | } |
415 | return err; |
416 | } |
417 | |
418 | static int do_get_sock_timeout(struct socket *sock, int level, int optname, |
419 | char __user *optval, int __user *optlen) |
420 | { |
421 | struct compat_timeval __user *up; |
422 | struct timeval ktime; |
423 | mm_segment_t old_fs; |
424 | int len, err; |
425 | |
426 | up = (struct compat_timeval __user *) optval; |
427 | if (get_user(len, optlen)) |
428 | return -EFAULT; |
429 | if (len < sizeof(*up)) |
430 | return -EINVAL; |
431 | len = sizeof(ktime); |
432 | old_fs = get_fs(); |
433 | set_fs(KERNEL_DS); |
434 | err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len); |
435 | set_fs(old_fs); |
436 | |
437 | if (!err) { |
438 | if (put_user(sizeof(*up), optlen) || |
439 | !access_ok(VERIFY_WRITE, up, sizeof(*up)) || |
440 | __put_user(ktime.tv_sec, &up->tv_sec) || |
441 | __put_user(ktime.tv_usec, &up->tv_usec)) |
442 | err = -EFAULT; |
443 | } |
444 | return err; |
445 | } |
446 | |
447 | static int compat_sock_getsockopt(struct socket *sock, int level, int optname, |
448 | char __user *optval, int __user *optlen) |
449 | { |
450 | if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) |
451 | return do_get_sock_timeout(sock, level, optname, optval, optlen); |
452 | return sock_getsockopt(sock, level, optname, optval, optlen); |
453 | } |
454 | |
455 | int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp) |
456 | { |
457 | struct compat_timeval __user *ctv = |
458 | (struct compat_timeval __user *) userstamp; |
459 | int err = -ENOENT; |
460 | struct timeval tv; |
461 | |
462 | if (!sock_flag(sk, SOCK_TIMESTAMP)) |
463 | sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
464 | tv = ktime_to_timeval(sk->sk_stamp); |
465 | if (tv.tv_sec == -1) |
466 | return err; |
467 | if (tv.tv_sec == 0) { |
468 | sk->sk_stamp = ktime_get_real(); |
469 | tv = ktime_to_timeval(sk->sk_stamp); |
470 | } |
471 | err = 0; |
472 | if (put_user(tv.tv_sec, &ctv->tv_sec) || |
473 | put_user(tv.tv_usec, &ctv->tv_usec)) |
474 | err = -EFAULT; |
475 | return err; |
476 | } |
477 | EXPORT_SYMBOL(compat_sock_get_timestamp); |
478 | |
479 | int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp) |
480 | { |
481 | struct compat_timespec __user *ctv = |
482 | (struct compat_timespec __user *) userstamp; |
483 | int err = -ENOENT; |
484 | struct timespec ts; |
485 | |
486 | if (!sock_flag(sk, SOCK_TIMESTAMP)) |
487 | sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
488 | ts = ktime_to_timespec(sk->sk_stamp); |
489 | if (ts.tv_sec == -1) |
490 | return err; |
491 | if (ts.tv_sec == 0) { |
492 | sk->sk_stamp = ktime_get_real(); |
493 | ts = ktime_to_timespec(sk->sk_stamp); |
494 | } |
495 | err = 0; |
496 | if (put_user(ts.tv_sec, &ctv->tv_sec) || |
497 | put_user(ts.tv_nsec, &ctv->tv_nsec)) |
498 | err = -EFAULT; |
499 | return err; |
500 | } |
501 | EXPORT_SYMBOL(compat_sock_get_timestampns); |
502 | |
503 | asmlinkage long compat_sys_getsockopt(int fd, int level, int optname, |
504 | char __user *optval, int __user *optlen) |
505 | { |
506 | int err; |
507 | struct socket *sock = sockfd_lookup(fd, &err); |
508 | |
509 | if (sock) { |
510 | err = security_socket_getsockopt(sock, level, optname); |
511 | if (err) { |
512 | sockfd_put(sock); |
513 | return err; |
514 | } |
515 | |
516 | if (level == SOL_SOCKET) |
517 | err = compat_sock_getsockopt(sock, level, |
518 | optname, optval, optlen); |
519 | else if (sock->ops->compat_getsockopt) |
520 | err = sock->ops->compat_getsockopt(sock, level, |
521 | optname, optval, optlen); |
522 | else |
523 | err = sock->ops->getsockopt(sock, level, |
524 | optname, optval, optlen); |
525 | sockfd_put(sock); |
526 | } |
527 | return err; |
528 | } |
529 | |
530 | struct compat_group_req { |
531 | __u32 gr_interface; |
532 | struct __kernel_sockaddr_storage gr_group |
533 | __attribute__ ((aligned(4))); |
534 | } __packed; |
535 | |
536 | struct compat_group_source_req { |
537 | __u32 gsr_interface; |
538 | struct __kernel_sockaddr_storage gsr_group |
539 | __attribute__ ((aligned(4))); |
540 | struct __kernel_sockaddr_storage gsr_source |
541 | __attribute__ ((aligned(4))); |
542 | } __packed; |
543 | |
544 | struct compat_group_filter { |
545 | __u32 gf_interface; |
546 | struct __kernel_sockaddr_storage gf_group |
547 | __attribute__ ((aligned(4))); |
548 | __u32 gf_fmode; |
549 | __u32 gf_numsrc; |
550 | struct __kernel_sockaddr_storage gf_slist[1] |
551 | __attribute__ ((aligned(4))); |
552 | } __packed; |
553 | |
554 | #define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \ |
555 | sizeof(struct __kernel_sockaddr_storage)) |
556 | |
557 | |
558 | int compat_mc_setsockopt(struct sock *sock, int level, int optname, |
559 | char __user *optval, unsigned int optlen, |
560 | int (*setsockopt)(struct sock *, int, int, char __user *, unsigned int)) |
561 | { |
562 | char __user *koptval = optval; |
563 | int koptlen = optlen; |
564 | |
565 | switch (optname) { |
566 | case MCAST_JOIN_GROUP: |
567 | case MCAST_LEAVE_GROUP: |
568 | { |
569 | struct compat_group_req __user *gr32 = (void *)optval; |
570 | struct group_req __user *kgr = |
571 | compat_alloc_user_space(sizeof(struct group_req)); |
572 | u32 interface; |
573 | |
574 | if (!access_ok(VERIFY_READ, gr32, sizeof(*gr32)) || |
575 | !access_ok(VERIFY_WRITE, kgr, sizeof(struct group_req)) || |
576 | __get_user(interface, &gr32->gr_interface) || |
577 | __put_user(interface, &kgr->gr_interface) || |
578 | copy_in_user(&kgr->gr_group, &gr32->gr_group, |
579 | sizeof(kgr->gr_group))) |
580 | return -EFAULT; |
581 | koptval = (char __user *)kgr; |
582 | koptlen = sizeof(struct group_req); |
583 | break; |
584 | } |
585 | case MCAST_JOIN_SOURCE_GROUP: |
586 | case MCAST_LEAVE_SOURCE_GROUP: |
587 | case MCAST_BLOCK_SOURCE: |
588 | case MCAST_UNBLOCK_SOURCE: |
589 | { |
590 | struct compat_group_source_req __user *gsr32 = (void *)optval; |
591 | struct group_source_req __user *kgsr = compat_alloc_user_space( |
592 | sizeof(struct group_source_req)); |
593 | u32 interface; |
594 | |
595 | if (!access_ok(VERIFY_READ, gsr32, sizeof(*gsr32)) || |
596 | !access_ok(VERIFY_WRITE, kgsr, |
597 | sizeof(struct group_source_req)) || |
598 | __get_user(interface, &gsr32->gsr_interface) || |
599 | __put_user(interface, &kgsr->gsr_interface) || |
600 | copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group, |
601 | sizeof(kgsr->gsr_group)) || |
602 | copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source, |
603 | sizeof(kgsr->gsr_source))) |
604 | return -EFAULT; |
605 | koptval = (char __user *)kgsr; |
606 | koptlen = sizeof(struct group_source_req); |
607 | break; |
608 | } |
609 | case MCAST_MSFILTER: |
610 | { |
611 | struct compat_group_filter __user *gf32 = (void *)optval; |
612 | struct group_filter __user *kgf; |
613 | u32 interface, fmode, numsrc; |
614 | |
615 | if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || |
616 | __get_user(interface, &gf32->gf_interface) || |
617 | __get_user(fmode, &gf32->gf_fmode) || |
618 | __get_user(numsrc, &gf32->gf_numsrc)) |
619 | return -EFAULT; |
620 | koptlen = optlen + sizeof(struct group_filter) - |
621 | sizeof(struct compat_group_filter); |
622 | if (koptlen < GROUP_FILTER_SIZE(numsrc)) |
623 | return -EINVAL; |
624 | kgf = compat_alloc_user_space(koptlen); |
625 | if (!access_ok(VERIFY_WRITE, kgf, koptlen) || |
626 | __put_user(interface, &kgf->gf_interface) || |
627 | __put_user(fmode, &kgf->gf_fmode) || |
628 | __put_user(numsrc, &kgf->gf_numsrc) || |
629 | copy_in_user(&kgf->gf_group, &gf32->gf_group, |
630 | sizeof(kgf->gf_group)) || |
631 | (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist, |
632 | numsrc * sizeof(kgf->gf_slist[0])))) |
633 | return -EFAULT; |
634 | koptval = (char __user *)kgf; |
635 | break; |
636 | } |
637 | |
638 | default: |
639 | break; |
640 | } |
641 | return setsockopt(sock, level, optname, koptval, koptlen); |
642 | } |
643 | EXPORT_SYMBOL(compat_mc_setsockopt); |
644 | |
645 | int compat_mc_getsockopt(struct sock *sock, int level, int optname, |
646 | char __user *optval, int __user *optlen, |
647 | int (*getsockopt)(struct sock *, int, int, char __user *, int __user *)) |
648 | { |
649 | struct compat_group_filter __user *gf32 = (void *)optval; |
650 | struct group_filter __user *kgf; |
651 | int __user *koptlen; |
652 | u32 interface, fmode, numsrc; |
653 | int klen, ulen, err; |
654 | |
655 | if (optname != MCAST_MSFILTER) |
656 | return getsockopt(sock, level, optname, optval, optlen); |
657 | |
658 | koptlen = compat_alloc_user_space(sizeof(*koptlen)); |
659 | if (!access_ok(VERIFY_READ, optlen, sizeof(*optlen)) || |
660 | __get_user(ulen, optlen)) |
661 | return -EFAULT; |
662 | |
663 | /* adjust len for pad */ |
664 | klen = ulen + sizeof(*kgf) - sizeof(*gf32); |
665 | |
666 | if (klen < GROUP_FILTER_SIZE(0)) |
667 | return -EINVAL; |
668 | |
669 | if (!access_ok(VERIFY_WRITE, koptlen, sizeof(*koptlen)) || |
670 | __put_user(klen, koptlen)) |
671 | return -EFAULT; |
672 | |
673 | /* have to allow space for previous compat_alloc_user_space, too */ |
674 | kgf = compat_alloc_user_space(klen+sizeof(*optlen)); |
675 | |
676 | if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || |
677 | __get_user(interface, &gf32->gf_interface) || |
678 | __get_user(fmode, &gf32->gf_fmode) || |
679 | __get_user(numsrc, &gf32->gf_numsrc) || |
680 | __put_user(interface, &kgf->gf_interface) || |
681 | __put_user(fmode, &kgf->gf_fmode) || |
682 | __put_user(numsrc, &kgf->gf_numsrc) || |
683 | copy_in_user(&kgf->gf_group, &gf32->gf_group, sizeof(kgf->gf_group))) |
684 | return -EFAULT; |
685 | |
686 | err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen); |
687 | if (err) |
688 | return err; |
689 | |
690 | if (!access_ok(VERIFY_READ, koptlen, sizeof(*koptlen)) || |
691 | __get_user(klen, koptlen)) |
692 | return -EFAULT; |
693 | |
694 | ulen = klen - (sizeof(*kgf)-sizeof(*gf32)); |
695 | |
696 | if (!access_ok(VERIFY_WRITE, optlen, sizeof(*optlen)) || |
697 | __put_user(ulen, optlen)) |
698 | return -EFAULT; |
699 | |
700 | if (!access_ok(VERIFY_READ, kgf, klen) || |
701 | !access_ok(VERIFY_WRITE, gf32, ulen) || |
702 | __get_user(interface, &kgf->gf_interface) || |
703 | __get_user(fmode, &kgf->gf_fmode) || |
704 | __get_user(numsrc, &kgf->gf_numsrc) || |
705 | __put_user(interface, &gf32->gf_interface) || |
706 | __put_user(fmode, &gf32->gf_fmode) || |
707 | __put_user(numsrc, &gf32->gf_numsrc)) |
708 | return -EFAULT; |
709 | if (numsrc) { |
710 | int copylen; |
711 | |
712 | klen -= GROUP_FILTER_SIZE(0); |
713 | copylen = numsrc * sizeof(gf32->gf_slist[0]); |
714 | if (copylen > klen) |
715 | copylen = klen; |
716 | if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen)) |
717 | return -EFAULT; |
718 | } |
719 | return err; |
720 | } |
721 | EXPORT_SYMBOL(compat_mc_getsockopt); |
722 | |
723 | |
724 | /* Argument list sizes for compat_sys_socketcall */ |
725 | #define AL(x) ((x) * sizeof(u32)) |
726 | static unsigned char nas[21] = { |
727 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
728 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), |
729 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), |
730 | AL(4), AL(5), AL(4) |
731 | }; |
732 | #undef AL |
733 | |
734 | asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned flags) |
735 | { |
736 | return sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); |
737 | } |
738 | |
739 | asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, |
740 | unsigned vlen, unsigned int flags) |
741 | { |
742 | return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, |
743 | flags | MSG_CMSG_COMPAT); |
744 | } |
745 | |
746 | asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags) |
747 | { |
748 | return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); |
749 | } |
750 | |
751 | asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len, unsigned flags) |
752 | { |
753 | return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT); |
754 | } |
755 | |
756 | asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, size_t len, |
757 | unsigned flags, struct sockaddr __user *addr, |
758 | int __user *addrlen) |
759 | { |
760 | return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen); |
761 | } |
762 | |
763 | asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg, |
764 | unsigned vlen, unsigned int flags, |
765 | struct compat_timespec __user *timeout) |
766 | { |
767 | int datagrams; |
768 | struct timespec ktspec; |
769 | |
770 | if (timeout == NULL) |
771 | return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, |
772 | flags | MSG_CMSG_COMPAT, NULL); |
773 | |
774 | if (get_compat_timespec(&ktspec, timeout)) |
775 | return -EFAULT; |
776 | |
777 | datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, |
778 | flags | MSG_CMSG_COMPAT, &ktspec); |
779 | if (datagrams > 0 && put_compat_timespec(&ktspec, timeout)) |
780 | datagrams = -EFAULT; |
781 | |
782 | return datagrams; |
783 | } |
784 | |
785 | asmlinkage long compat_sys_socketcall(int call, u32 __user *args) |
786 | { |
787 | int ret; |
788 | u32 a[6]; |
789 | u32 a0, a1; |
790 | |
791 | if (call < SYS_SOCKET || call > SYS_SENDMMSG) |
792 | return -EINVAL; |
793 | if (copy_from_user(a, args, nas[call])) |
794 | return -EFAULT; |
795 | a0 = a[0]; |
796 | a1 = a[1]; |
797 | |
798 | switch (call) { |
799 | case SYS_SOCKET: |
800 | ret = sys_socket(a0, a1, a[2]); |
801 | break; |
802 | case SYS_BIND: |
803 | ret = sys_bind(a0, compat_ptr(a1), a[2]); |
804 | break; |
805 | case SYS_CONNECT: |
806 | ret = sys_connect(a0, compat_ptr(a1), a[2]); |
807 | break; |
808 | case SYS_LISTEN: |
809 | ret = sys_listen(a0, a1); |
810 | break; |
811 | case SYS_ACCEPT: |
812 | ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0); |
813 | break; |
814 | case SYS_GETSOCKNAME: |
815 | ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2])); |
816 | break; |
817 | case SYS_GETPEERNAME: |
818 | ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2])); |
819 | break; |
820 | case SYS_SOCKETPAIR: |
821 | ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3])); |
822 | break; |
823 | case SYS_SEND: |
824 | ret = sys_send(a0, compat_ptr(a1), a[2], a[3]); |
825 | break; |
826 | case SYS_SENDTO: |
827 | ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]); |
828 | break; |
829 | case SYS_RECV: |
830 | ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]); |
831 | break; |
832 | case SYS_RECVFROM: |
833 | ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], |
834 | compat_ptr(a[4]), compat_ptr(a[5])); |
835 | break; |
836 | case SYS_SHUTDOWN: |
837 | ret = sys_shutdown(a0, a1); |
838 | break; |
839 | case SYS_SETSOCKOPT: |
840 | ret = compat_sys_setsockopt(a0, a1, a[2], |
841 | compat_ptr(a[3]), a[4]); |
842 | break; |
843 | case SYS_GETSOCKOPT: |
844 | ret = compat_sys_getsockopt(a0, a1, a[2], |
845 | compat_ptr(a[3]), compat_ptr(a[4])); |
846 | break; |
847 | case SYS_SENDMSG: |
848 | ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]); |
849 | break; |
850 | case SYS_SENDMMSG: |
851 | ret = compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]); |
852 | break; |
853 | case SYS_RECVMSG: |
854 | ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]); |
855 | break; |
856 | case SYS_RECVMMSG: |
857 | ret = compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3], |
858 | compat_ptr(a[4])); |
859 | break; |
860 | case SYS_ACCEPT4: |
861 | ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]); |
862 | break; |
863 | default: |
864 | ret = -EINVAL; |
865 | break; |
866 | } |
867 | return ret; |
868 | } |
869 |
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Tags:
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v2.6.34-rc5
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