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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_storage *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_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; |
223 | struct compat_cmsghdr cmhdr; |
224 | struct compat_timeval ctv; |
225 | struct compat_timespec cts[3]; |
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 (!COMPAT_USE_64BIT_TIME) { |
234 | if (level == SOL_SOCKET && type == SCM_TIMESTAMP) { |
235 | struct timeval *tv = (struct timeval *)data; |
236 | ctv.tv_sec = tv->tv_sec; |
237 | ctv.tv_usec = tv->tv_usec; |
238 | data = &ctv; |
239 | len = sizeof(ctv); |
240 | } |
241 | if (level == SOL_SOCKET && |
242 | (type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) { |
243 | int count = type == SCM_TIMESTAMPNS ? 1 : 3; |
244 | int i; |
245 | struct timespec *ts = (struct timespec *)data; |
246 | for (i = 0; i < count; i++) { |
247 | cts[i].tv_sec = ts[i].tv_sec; |
248 | cts[i].tv_nsec = ts[i].tv_nsec; |
249 | } |
250 | data = &cts; |
251 | len = sizeof(cts[0]) * count; |
252 | } |
253 | } |
254 | |
255 | cmlen = CMSG_COMPAT_LEN(len); |
256 | if (kmsg->msg_controllen < cmlen) { |
257 | kmsg->msg_flags |= MSG_CTRUNC; |
258 | cmlen = kmsg->msg_controllen; |
259 | } |
260 | cmhdr.cmsg_level = level; |
261 | cmhdr.cmsg_type = type; |
262 | cmhdr.cmsg_len = cmlen; |
263 | |
264 | if (copy_to_user(cm, &cmhdr, sizeof cmhdr)) |
265 | return -EFAULT; |
266 | if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr))) |
267 | return -EFAULT; |
268 | cmlen = CMSG_COMPAT_SPACE(len); |
269 | if (kmsg->msg_controllen < cmlen) |
270 | cmlen = kmsg->msg_controllen; |
271 | kmsg->msg_control += cmlen; |
272 | kmsg->msg_controllen -= cmlen; |
273 | return 0; |
274 | } |
275 | |
276 | void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm) |
277 | { |
278 | struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; |
279 | int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int); |
280 | int fdnum = scm->fp->count; |
281 | struct file **fp = scm->fp->fp; |
282 | int __user *cmfptr; |
283 | int err = 0, i; |
284 | |
285 | if (fdnum < fdmax) |
286 | fdmax = fdnum; |
287 | |
288 | for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) { |
289 | int new_fd; |
290 | err = security_file_receive(fp[i]); |
291 | if (err) |
292 | break; |
293 | err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags |
294 | ? O_CLOEXEC : 0); |
295 | if (err < 0) |
296 | break; |
297 | new_fd = err; |
298 | err = put_user(new_fd, cmfptr); |
299 | if (err) { |
300 | put_unused_fd(new_fd); |
301 | break; |
302 | } |
303 | /* Bump the usage count and install the file. */ |
304 | fd_install(new_fd, get_file(fp[i])); |
305 | } |
306 | |
307 | if (i > 0) { |
308 | int cmlen = CMSG_COMPAT_LEN(i * sizeof(int)); |
309 | err = put_user(SOL_SOCKET, &cm->cmsg_level); |
310 | if (!err) |
311 | err = put_user(SCM_RIGHTS, &cm->cmsg_type); |
312 | if (!err) |
313 | err = put_user(cmlen, &cm->cmsg_len); |
314 | if (!err) { |
315 | cmlen = CMSG_COMPAT_SPACE(i * sizeof(int)); |
316 | kmsg->msg_control += cmlen; |
317 | kmsg->msg_controllen -= cmlen; |
318 | } |
319 | } |
320 | if (i < fdnum) |
321 | kmsg->msg_flags |= MSG_CTRUNC; |
322 | |
323 | /* |
324 | * All of the files that fit in the message have had their |
325 | * usage counts incremented, so we just free the list. |
326 | */ |
327 | __scm_destroy(scm); |
328 | } |
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 compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval; |
334 | struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog)); |
335 | compat_uptr_t ptr; |
336 | u16 len; |
337 | |
338 | if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) || |
339 | !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) || |
340 | __get_user(len, &fprog32->len) || |
341 | __get_user(ptr, &fprog32->filter) || |
342 | __put_user(len, &kfprog->len) || |
343 | __put_user(compat_ptr(ptr), &kfprog->filter)) |
344 | return -EFAULT; |
345 | |
346 | return sock_setsockopt(sock, level, optname, (char __user *)kfprog, |
347 | sizeof(struct sock_fprog)); |
348 | } |
349 | |
350 | static int do_set_sock_timeout(struct socket *sock, int level, |
351 | int optname, char __user *optval, unsigned int optlen) |
352 | { |
353 | struct compat_timeval __user *up = (struct compat_timeval __user *)optval; |
354 | struct timeval ktime; |
355 | mm_segment_t old_fs; |
356 | int err; |
357 | |
358 | if (optlen < sizeof(*up)) |
359 | return -EINVAL; |
360 | if (!access_ok(VERIFY_READ, up, sizeof(*up)) || |
361 | __get_user(ktime.tv_sec, &up->tv_sec) || |
362 | __get_user(ktime.tv_usec, &up->tv_usec)) |
363 | return -EFAULT; |
364 | old_fs = get_fs(); |
365 | set_fs(KERNEL_DS); |
366 | err = sock_setsockopt(sock, level, optname, (char *)&ktime, sizeof(ktime)); |
367 | set_fs(old_fs); |
368 | |
369 | return err; |
370 | } |
371 | |
372 | static int compat_sock_setsockopt(struct socket *sock, int level, int optname, |
373 | char __user *optval, unsigned int optlen) |
374 | { |
375 | if (optname == SO_ATTACH_FILTER) |
376 | return do_set_attach_filter(sock, level, optname, |
377 | optval, optlen); |
378 | if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) |
379 | return do_set_sock_timeout(sock, level, optname, optval, optlen); |
380 | |
381 | return sock_setsockopt(sock, level, optname, optval, optlen); |
382 | } |
383 | |
384 | asmlinkage long compat_sys_setsockopt(int fd, int level, int optname, |
385 | char __user *optval, unsigned int optlen) |
386 | { |
387 | int err; |
388 | struct socket *sock = sockfd_lookup(fd, &err); |
389 | |
390 | if (sock) { |
391 | err = security_socket_setsockopt(sock, level, optname); |
392 | if (err) { |
393 | sockfd_put(sock); |
394 | return err; |
395 | } |
396 | |
397 | if (level == SOL_SOCKET) |
398 | err = compat_sock_setsockopt(sock, level, |
399 | optname, optval, optlen); |
400 | else if (sock->ops->compat_setsockopt) |
401 | err = sock->ops->compat_setsockopt(sock, level, |
402 | optname, optval, optlen); |
403 | else |
404 | err = sock->ops->setsockopt(sock, level, |
405 | optname, optval, optlen); |
406 | sockfd_put(sock); |
407 | } |
408 | return err; |
409 | } |
410 | |
411 | static int do_get_sock_timeout(struct socket *sock, int level, int optname, |
412 | char __user *optval, int __user *optlen) |
413 | { |
414 | struct compat_timeval __user *up; |
415 | struct timeval ktime; |
416 | mm_segment_t old_fs; |
417 | int len, err; |
418 | |
419 | up = (struct compat_timeval __user *) optval; |
420 | if (get_user(len, optlen)) |
421 | return -EFAULT; |
422 | if (len < sizeof(*up)) |
423 | return -EINVAL; |
424 | len = sizeof(ktime); |
425 | old_fs = get_fs(); |
426 | set_fs(KERNEL_DS); |
427 | err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len); |
428 | set_fs(old_fs); |
429 | |
430 | if (!err) { |
431 | if (put_user(sizeof(*up), optlen) || |
432 | !access_ok(VERIFY_WRITE, up, sizeof(*up)) || |
433 | __put_user(ktime.tv_sec, &up->tv_sec) || |
434 | __put_user(ktime.tv_usec, &up->tv_usec)) |
435 | err = -EFAULT; |
436 | } |
437 | return err; |
438 | } |
439 | |
440 | static int compat_sock_getsockopt(struct socket *sock, int level, int optname, |
441 | char __user *optval, int __user *optlen) |
442 | { |
443 | if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) |
444 | return do_get_sock_timeout(sock, level, optname, optval, optlen); |
445 | return sock_getsockopt(sock, level, optname, optval, optlen); |
446 | } |
447 | |
448 | int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp) |
449 | { |
450 | struct compat_timeval __user *ctv; |
451 | int err; |
452 | struct timeval tv; |
453 | |
454 | if (COMPAT_USE_64BIT_TIME) |
455 | return sock_get_timestamp(sk, userstamp); |
456 | |
457 | ctv = (struct compat_timeval __user *) userstamp; |
458 | err = -ENOENT; |
459 | if (!sock_flag(sk, SOCK_TIMESTAMP)) |
460 | sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
461 | tv = ktime_to_timeval(sk->sk_stamp); |
462 | if (tv.tv_sec == -1) |
463 | return err; |
464 | if (tv.tv_sec == 0) { |
465 | sk->sk_stamp = ktime_get_real(); |
466 | tv = ktime_to_timeval(sk->sk_stamp); |
467 | } |
468 | err = 0; |
469 | if (put_user(tv.tv_sec, &ctv->tv_sec) || |
470 | put_user(tv.tv_usec, &ctv->tv_usec)) |
471 | err = -EFAULT; |
472 | return err; |
473 | } |
474 | EXPORT_SYMBOL(compat_sock_get_timestamp); |
475 | |
476 | int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp) |
477 | { |
478 | struct compat_timespec __user *ctv; |
479 | int err; |
480 | struct timespec ts; |
481 | |
482 | if (COMPAT_USE_64BIT_TIME) |
483 | return sock_get_timestampns (sk, userstamp); |
484 | |
485 | ctv = (struct compat_timespec __user *) userstamp; |
486 | err = -ENOENT; |
487 | if (!sock_flag(sk, SOCK_TIMESTAMP)) |
488 | sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
489 | ts = ktime_to_timespec(sk->sk_stamp); |
490 | if (ts.tv_sec == -1) |
491 | return err; |
492 | if (ts.tv_sec == 0) { |
493 | sk->sk_stamp = ktime_get_real(); |
494 | ts = ktime_to_timespec(sk->sk_stamp); |
495 | } |
496 | err = 0; |
497 | if (put_user(ts.tv_sec, &ctv->tv_sec) || |
498 | put_user(ts.tv_nsec, &ctv->tv_nsec)) |
499 | err = -EFAULT; |
500 | return err; |
501 | } |
502 | EXPORT_SYMBOL(compat_sock_get_timestampns); |
503 | |
504 | asmlinkage long compat_sys_getsockopt(int fd, int level, int optname, |
505 | char __user *optval, int __user *optlen) |
506 | { |
507 | int err; |
508 | struct socket *sock = sockfd_lookup(fd, &err); |
509 | |
510 | if (sock) { |
511 | err = security_socket_getsockopt(sock, level, optname); |
512 | if (err) { |
513 | sockfd_put(sock); |
514 | return err; |
515 | } |
516 | |
517 | if (level == SOL_SOCKET) |
518 | err = compat_sock_getsockopt(sock, level, |
519 | optname, optval, optlen); |
520 | else if (sock->ops->compat_getsockopt) |
521 | err = sock->ops->compat_getsockopt(sock, level, |
522 | optname, optval, optlen); |
523 | else |
524 | err = sock->ops->getsockopt(sock, level, |
525 | optname, optval, optlen); |
526 | sockfd_put(sock); |
527 | } |
528 | return err; |
529 | } |
530 | |
531 | struct compat_group_req { |
532 | __u32 gr_interface; |
533 | struct __kernel_sockaddr_storage gr_group |
534 | __attribute__ ((aligned(4))); |
535 | } __packed; |
536 | |
537 | struct compat_group_source_req { |
538 | __u32 gsr_interface; |
539 | struct __kernel_sockaddr_storage gsr_group |
540 | __attribute__ ((aligned(4))); |
541 | struct __kernel_sockaddr_storage gsr_source |
542 | __attribute__ ((aligned(4))); |
543 | } __packed; |
544 | |
545 | struct compat_group_filter { |
546 | __u32 gf_interface; |
547 | struct __kernel_sockaddr_storage gf_group |
548 | __attribute__ ((aligned(4))); |
549 | __u32 gf_fmode; |
550 | __u32 gf_numsrc; |
551 | struct __kernel_sockaddr_storage gf_slist[1] |
552 | __attribute__ ((aligned(4))); |
553 | } __packed; |
554 | |
555 | #define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \ |
556 | sizeof(struct __kernel_sockaddr_storage)) |
557 | |
558 | |
559 | int compat_mc_setsockopt(struct sock *sock, int level, int optname, |
560 | char __user *optval, unsigned int optlen, |
561 | int (*setsockopt)(struct sock *, int, int, char __user *, unsigned int)) |
562 | { |
563 | char __user *koptval = optval; |
564 | int koptlen = optlen; |
565 | |
566 | switch (optname) { |
567 | case MCAST_JOIN_GROUP: |
568 | case MCAST_LEAVE_GROUP: |
569 | { |
570 | struct compat_group_req __user *gr32 = (void *)optval; |
571 | struct group_req __user *kgr = |
572 | compat_alloc_user_space(sizeof(struct group_req)); |
573 | u32 interface; |
574 | |
575 | if (!access_ok(VERIFY_READ, gr32, sizeof(*gr32)) || |
576 | !access_ok(VERIFY_WRITE, kgr, sizeof(struct group_req)) || |
577 | __get_user(interface, &gr32->gr_interface) || |
578 | __put_user(interface, &kgr->gr_interface) || |
579 | copy_in_user(&kgr->gr_group, &gr32->gr_group, |
580 | sizeof(kgr->gr_group))) |
581 | return -EFAULT; |
582 | koptval = (char __user *)kgr; |
583 | koptlen = sizeof(struct group_req); |
584 | break; |
585 | } |
586 | case MCAST_JOIN_SOURCE_GROUP: |
587 | case MCAST_LEAVE_SOURCE_GROUP: |
588 | case MCAST_BLOCK_SOURCE: |
589 | case MCAST_UNBLOCK_SOURCE: |
590 | { |
591 | struct compat_group_source_req __user *gsr32 = (void *)optval; |
592 | struct group_source_req __user *kgsr = compat_alloc_user_space( |
593 | sizeof(struct group_source_req)); |
594 | u32 interface; |
595 | |
596 | if (!access_ok(VERIFY_READ, gsr32, sizeof(*gsr32)) || |
597 | !access_ok(VERIFY_WRITE, kgsr, |
598 | sizeof(struct group_source_req)) || |
599 | __get_user(interface, &gsr32->gsr_interface) || |
600 | __put_user(interface, &kgsr->gsr_interface) || |
601 | copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group, |
602 | sizeof(kgsr->gsr_group)) || |
603 | copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source, |
604 | sizeof(kgsr->gsr_source))) |
605 | return -EFAULT; |
606 | koptval = (char __user *)kgsr; |
607 | koptlen = sizeof(struct group_source_req); |
608 | break; |
609 | } |
610 | case MCAST_MSFILTER: |
611 | { |
612 | struct compat_group_filter __user *gf32 = (void *)optval; |
613 | struct group_filter __user *kgf; |
614 | u32 interface, fmode, numsrc; |
615 | |
616 | if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || |
617 | __get_user(interface, &gf32->gf_interface) || |
618 | __get_user(fmode, &gf32->gf_fmode) || |
619 | __get_user(numsrc, &gf32->gf_numsrc)) |
620 | return -EFAULT; |
621 | koptlen = optlen + sizeof(struct group_filter) - |
622 | sizeof(struct compat_group_filter); |
623 | if (koptlen < GROUP_FILTER_SIZE(numsrc)) |
624 | return -EINVAL; |
625 | kgf = compat_alloc_user_space(koptlen); |
626 | if (!access_ok(VERIFY_WRITE, kgf, koptlen) || |
627 | __put_user(interface, &kgf->gf_interface) || |
628 | __put_user(fmode, &kgf->gf_fmode) || |
629 | __put_user(numsrc, &kgf->gf_numsrc) || |
630 | copy_in_user(&kgf->gf_group, &gf32->gf_group, |
631 | sizeof(kgf->gf_group)) || |
632 | (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist, |
633 | numsrc * sizeof(kgf->gf_slist[0])))) |
634 | return -EFAULT; |
635 | koptval = (char __user *)kgf; |
636 | break; |
637 | } |
638 | |
639 | default: |
640 | break; |
641 | } |
642 | return setsockopt(sock, level, optname, koptval, koptlen); |
643 | } |
644 | EXPORT_SYMBOL(compat_mc_setsockopt); |
645 | |
646 | int compat_mc_getsockopt(struct sock *sock, int level, int optname, |
647 | char __user *optval, int __user *optlen, |
648 | int (*getsockopt)(struct sock *, int, int, char __user *, int __user *)) |
649 | { |
650 | struct compat_group_filter __user *gf32 = (void *)optval; |
651 | struct group_filter __user *kgf; |
652 | int __user *koptlen; |
653 | u32 interface, fmode, numsrc; |
654 | int klen, ulen, err; |
655 | |
656 | if (optname != MCAST_MSFILTER) |
657 | return getsockopt(sock, level, optname, optval, optlen); |
658 | |
659 | koptlen = compat_alloc_user_space(sizeof(*koptlen)); |
660 | if (!access_ok(VERIFY_READ, optlen, sizeof(*optlen)) || |
661 | __get_user(ulen, optlen)) |
662 | return -EFAULT; |
663 | |
664 | /* adjust len for pad */ |
665 | klen = ulen + sizeof(*kgf) - sizeof(*gf32); |
666 | |
667 | if (klen < GROUP_FILTER_SIZE(0)) |
668 | return -EINVAL; |
669 | |
670 | if (!access_ok(VERIFY_WRITE, koptlen, sizeof(*koptlen)) || |
671 | __put_user(klen, koptlen)) |
672 | return -EFAULT; |
673 | |
674 | /* have to allow space for previous compat_alloc_user_space, too */ |
675 | kgf = compat_alloc_user_space(klen+sizeof(*optlen)); |
676 | |
677 | if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || |
678 | __get_user(interface, &gf32->gf_interface) || |
679 | __get_user(fmode, &gf32->gf_fmode) || |
680 | __get_user(numsrc, &gf32->gf_numsrc) || |
681 | __put_user(interface, &kgf->gf_interface) || |
682 | __put_user(fmode, &kgf->gf_fmode) || |
683 | __put_user(numsrc, &kgf->gf_numsrc) || |
684 | copy_in_user(&kgf->gf_group, &gf32->gf_group, sizeof(kgf->gf_group))) |
685 | return -EFAULT; |
686 | |
687 | err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen); |
688 | if (err) |
689 | return err; |
690 | |
691 | if (!access_ok(VERIFY_READ, koptlen, sizeof(*koptlen)) || |
692 | __get_user(klen, koptlen)) |
693 | return -EFAULT; |
694 | |
695 | ulen = klen - (sizeof(*kgf)-sizeof(*gf32)); |
696 | |
697 | if (!access_ok(VERIFY_WRITE, optlen, sizeof(*optlen)) || |
698 | __put_user(ulen, optlen)) |
699 | return -EFAULT; |
700 | |
701 | if (!access_ok(VERIFY_READ, kgf, klen) || |
702 | !access_ok(VERIFY_WRITE, gf32, ulen) || |
703 | __get_user(interface, &kgf->gf_interface) || |
704 | __get_user(fmode, &kgf->gf_fmode) || |
705 | __get_user(numsrc, &kgf->gf_numsrc) || |
706 | __put_user(interface, &gf32->gf_interface) || |
707 | __put_user(fmode, &gf32->gf_fmode) || |
708 | __put_user(numsrc, &gf32->gf_numsrc)) |
709 | return -EFAULT; |
710 | if (numsrc) { |
711 | int copylen; |
712 | |
713 | klen -= GROUP_FILTER_SIZE(0); |
714 | copylen = numsrc * sizeof(gf32->gf_slist[0]); |
715 | if (copylen > klen) |
716 | copylen = klen; |
717 | if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen)) |
718 | return -EFAULT; |
719 | } |
720 | return err; |
721 | } |
722 | EXPORT_SYMBOL(compat_mc_getsockopt); |
723 | |
724 | |
725 | /* Argument list sizes for compat_sys_socketcall */ |
726 | #define AL(x) ((x) * sizeof(u32)) |
727 | static unsigned char nas[21] = { |
728 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
729 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), |
730 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), |
731 | AL(4), AL(5), AL(4) |
732 | }; |
733 | #undef AL |
734 | |
735 | asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags) |
736 | { |
737 | return sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); |
738 | } |
739 | |
740 | asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, |
741 | unsigned int vlen, unsigned int flags) |
742 | { |
743 | return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, |
744 | flags | MSG_CMSG_COMPAT); |
745 | } |
746 | |
747 | asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags) |
748 | { |
749 | return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); |
750 | } |
751 | |
752 | asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len, unsigned int flags) |
753 | { |
754 | return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT); |
755 | } |
756 | |
757 | asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, size_t len, |
758 | unsigned int flags, struct sockaddr __user *addr, |
759 | int __user *addrlen) |
760 | { |
761 | return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen); |
762 | } |
763 | |
764 | asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg, |
765 | unsigned int vlen, unsigned int flags, |
766 | struct compat_timespec __user *timeout) |
767 | { |
768 | int datagrams; |
769 | struct timespec ktspec; |
770 | |
771 | if (COMPAT_USE_64BIT_TIME) |
772 | return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, |
773 | flags | MSG_CMSG_COMPAT, |
774 | (struct timespec *) timeout); |
775 | |
776 | if (timeout == NULL) |
777 | return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, |
778 | flags | MSG_CMSG_COMPAT, NULL); |
779 | |
780 | if (get_compat_timespec(&ktspec, timeout)) |
781 | return -EFAULT; |
782 | |
783 | datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, |
784 | flags | MSG_CMSG_COMPAT, &ktspec); |
785 | if (datagrams > 0 && put_compat_timespec(&ktspec, timeout)) |
786 | datagrams = -EFAULT; |
787 | |
788 | return datagrams; |
789 | } |
790 | |
791 | asmlinkage long compat_sys_socketcall(int call, u32 __user *args) |
792 | { |
793 | int ret; |
794 | u32 a[6]; |
795 | u32 a0, a1; |
796 | |
797 | if (call < SYS_SOCKET || call > SYS_SENDMMSG) |
798 | return -EINVAL; |
799 | if (copy_from_user(a, args, nas[call])) |
800 | return -EFAULT; |
801 | a0 = a[0]; |
802 | a1 = a[1]; |
803 | |
804 | switch (call) { |
805 | case SYS_SOCKET: |
806 | ret = sys_socket(a0, a1, a[2]); |
807 | break; |
808 | case SYS_BIND: |
809 | ret = sys_bind(a0, compat_ptr(a1), a[2]); |
810 | break; |
811 | case SYS_CONNECT: |
812 | ret = sys_connect(a0, compat_ptr(a1), a[2]); |
813 | break; |
814 | case SYS_LISTEN: |
815 | ret = sys_listen(a0, a1); |
816 | break; |
817 | case SYS_ACCEPT: |
818 | ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0); |
819 | break; |
820 | case SYS_GETSOCKNAME: |
821 | ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2])); |
822 | break; |
823 | case SYS_GETPEERNAME: |
824 | ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2])); |
825 | break; |
826 | case SYS_SOCKETPAIR: |
827 | ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3])); |
828 | break; |
829 | case SYS_SEND: |
830 | ret = sys_send(a0, compat_ptr(a1), a[2], a[3]); |
831 | break; |
832 | case SYS_SENDTO: |
833 | ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]); |
834 | break; |
835 | case SYS_RECV: |
836 | ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]); |
837 | break; |
838 | case SYS_RECVFROM: |
839 | ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], |
840 | compat_ptr(a[4]), compat_ptr(a[5])); |
841 | break; |
842 | case SYS_SHUTDOWN: |
843 | ret = sys_shutdown(a0, a1); |
844 | break; |
845 | case SYS_SETSOCKOPT: |
846 | ret = compat_sys_setsockopt(a0, a1, a[2], |
847 | compat_ptr(a[3]), a[4]); |
848 | break; |
849 | case SYS_GETSOCKOPT: |
850 | ret = compat_sys_getsockopt(a0, a1, a[2], |
851 | compat_ptr(a[3]), compat_ptr(a[4])); |
852 | break; |
853 | case SYS_SENDMSG: |
854 | ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]); |
855 | break; |
856 | case SYS_SENDMMSG: |
857 | ret = compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]); |
858 | break; |
859 | case SYS_RECVMSG: |
860 | ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]); |
861 | break; |
862 | case SYS_RECVMMSG: |
863 | ret = compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3], |
864 | compat_ptr(a[4])); |
865 | break; |
866 | case SYS_ACCEPT4: |
867 | ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]); |
868 | break; |
869 | default: |
870 | ret = -EINVAL; |
871 | break; |
872 | } |
873 | return ret; |
874 | } |
875 |
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