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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 | |
26 | #include <net/scm.h> |
27 | #include <net/sock.h> |
28 | #include <net/ip.h> |
29 | #include <net/ipv6.h> |
30 | #include <asm/uaccess.h> |
31 | #include <net/compat.h> |
32 | |
33 | static inline int iov_from_user_compat_to_kern(struct iovec *kiov, |
34 | struct compat_iovec __user *uiov32, |
35 | int niov) |
36 | { |
37 | int tot_len = 0; |
38 | |
39 | while (niov > 0) { |
40 | compat_uptr_t buf; |
41 | compat_size_t len; |
42 | |
43 | if (get_user(len, &uiov32->iov_len) || |
44 | get_user(buf, &uiov32->iov_base)) { |
45 | tot_len = -EFAULT; |
46 | break; |
47 | } |
48 | tot_len += len; |
49 | kiov->iov_base = compat_ptr(buf); |
50 | kiov->iov_len = (__kernel_size_t) len; |
51 | uiov32++; |
52 | kiov++; |
53 | niov--; |
54 | } |
55 | return tot_len; |
56 | } |
57 | |
58 | int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg) |
59 | { |
60 | compat_uptr_t tmp1, tmp2, tmp3; |
61 | |
62 | if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) || |
63 | __get_user(tmp1, &umsg->msg_name) || |
64 | __get_user(kmsg->msg_namelen, &umsg->msg_namelen) || |
65 | __get_user(tmp2, &umsg->msg_iov) || |
66 | __get_user(kmsg->msg_iovlen, &umsg->msg_iovlen) || |
67 | __get_user(tmp3, &umsg->msg_control) || |
68 | __get_user(kmsg->msg_controllen, &umsg->msg_controllen) || |
69 | __get_user(kmsg->msg_flags, &umsg->msg_flags)) |
70 | return -EFAULT; |
71 | kmsg->msg_name = compat_ptr(tmp1); |
72 | kmsg->msg_iov = compat_ptr(tmp2); |
73 | kmsg->msg_control = compat_ptr(tmp3); |
74 | return 0; |
75 | } |
76 | |
77 | /* I've named the args so it is easy to tell whose space the pointers are in. */ |
78 | int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov, |
79 | struct sockaddr *kern_address, int mode) |
80 | { |
81 | int tot_len; |
82 | |
83 | if (kern_msg->msg_namelen) { |
84 | if (mode==VERIFY_READ) { |
85 | int err = move_addr_to_kernel(kern_msg->msg_name, |
86 | kern_msg->msg_namelen, |
87 | kern_address); |
88 | if (err < 0) |
89 | return err; |
90 | } |
91 | kern_msg->msg_name = kern_address; |
92 | } else |
93 | kern_msg->msg_name = NULL; |
94 | |
95 | tot_len = iov_from_user_compat_to_kern(kern_iov, |
96 | (struct compat_iovec __user *)kern_msg->msg_iov, |
97 | kern_msg->msg_iovlen); |
98 | if (tot_len >= 0) |
99 | kern_msg->msg_iov = kern_iov; |
100 | |
101 | return tot_len; |
102 | } |
103 | |
104 | /* Bleech... */ |
105 | #define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32)) |
106 | |
107 | #define CMSG_COMPAT_DATA(cmsg) \ |
108 | ((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)))) |
109 | #define CMSG_COMPAT_SPACE(len) \ |
110 | (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len)) |
111 | #define CMSG_COMPAT_LEN(len) \ |
112 | (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len)) |
113 | |
114 | #define CMSG_COMPAT_FIRSTHDR(msg) \ |
115 | (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \ |
116 | (struct compat_cmsghdr __user *)((msg)->msg_control) : \ |
117 | (struct compat_cmsghdr __user *)NULL) |
118 | |
119 | #define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \ |
120 | ((ucmlen) >= sizeof(struct compat_cmsghdr) && \ |
121 | (ucmlen) <= (unsigned long) \ |
122 | ((mhdr)->msg_controllen - \ |
123 | ((char *)(ucmsg) - (char *)(mhdr)->msg_control))) |
124 | |
125 | static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg, |
126 | struct compat_cmsghdr __user *cmsg, int cmsg_len) |
127 | { |
128 | char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len); |
129 | if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) > |
130 | msg->msg_controllen) |
131 | return NULL; |
132 | return (struct compat_cmsghdr __user *)ptr; |
133 | } |
134 | |
135 | /* There is a lot of hair here because the alignment rules (and |
136 | * thus placement) of cmsg headers and length are different for |
137 | * 32-bit apps. -DaveM |
138 | */ |
139 | int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk, |
140 | unsigned char *stackbuf, int stackbuf_size) |
141 | { |
142 | struct compat_cmsghdr __user *ucmsg; |
143 | struct cmsghdr *kcmsg, *kcmsg_base; |
144 | compat_size_t ucmlen; |
145 | __kernel_size_t kcmlen, tmp; |
146 | int err = -EFAULT; |
147 | |
148 | kcmlen = 0; |
149 | kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf; |
150 | ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); |
151 | while (ucmsg != NULL) { |
152 | if (get_user(ucmlen, &ucmsg->cmsg_len)) |
153 | return -EFAULT; |
154 | |
155 | /* Catch bogons. */ |
156 | if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) |
157 | return -EINVAL; |
158 | |
159 | tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + |
160 | CMSG_ALIGN(sizeof(struct cmsghdr))); |
161 | tmp = CMSG_ALIGN(tmp); |
162 | kcmlen += tmp; |
163 | ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); |
164 | } |
165 | if (kcmlen == 0) |
166 | return -EINVAL; |
167 | |
168 | /* The kcmlen holds the 64-bit version of the control length. |
169 | * It may not be modified as we do not stick it into the kmsg |
170 | * until we have successfully copied over all of the data |
171 | * from the user. |
172 | */ |
173 | if (kcmlen > stackbuf_size) |
174 | kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL); |
175 | if (kcmsg == NULL) |
176 | return -ENOBUFS; |
177 | |
178 | /* Now copy them over neatly. */ |
179 | memset(kcmsg, 0, kcmlen); |
180 | ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); |
181 | while (ucmsg != NULL) { |
182 | if (__get_user(ucmlen, &ucmsg->cmsg_len)) |
183 | goto Efault; |
184 | if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) |
185 | goto Einval; |
186 | tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + |
187 | CMSG_ALIGN(sizeof(struct cmsghdr))); |
188 | if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp)) |
189 | goto Einval; |
190 | kcmsg->cmsg_len = tmp; |
191 | tmp = CMSG_ALIGN(tmp); |
192 | if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) || |
193 | __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) || |
194 | copy_from_user(CMSG_DATA(kcmsg), |
195 | CMSG_COMPAT_DATA(ucmsg), |
196 | (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))))) |
197 | goto Efault; |
198 | |
199 | /* Advance. */ |
200 | kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp); |
201 | ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); |
202 | } |
203 | |
204 | /* Ok, looks like we made it. Hook it up and return success. */ |
205 | kmsg->msg_control = kcmsg_base; |
206 | kmsg->msg_controllen = kcmlen; |
207 | return 0; |
208 | |
209 | Einval: |
210 | err = -EINVAL; |
211 | Efault: |
212 | if (kcmsg_base != (struct cmsghdr *)stackbuf) |
213 | sock_kfree_s(sk, kcmsg_base, kcmlen); |
214 | return err; |
215 | } |
216 | |
217 | int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data) |
218 | { |
219 | struct compat_timeval ctv; |
220 | struct compat_timespec cts[3]; |
221 | struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; |
222 | struct compat_cmsghdr cmhdr; |
223 | int cmlen; |
224 | |
225 | if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) { |
226 | kmsg->msg_flags |= MSG_CTRUNC; |
227 | return 0; /* XXX: return error? check spec. */ |
228 | } |
229 | |
230 | if (level == SOL_SOCKET && type == SCM_TIMESTAMP) { |
231 | struct timeval *tv = (struct timeval *)data; |
232 | ctv.tv_sec = tv->tv_sec; |
233 | ctv.tv_usec = tv->tv_usec; |
234 | data = &ctv; |
235 | len = sizeof(ctv); |
236 | } |
237 | if (level == SOL_SOCKET && |
238 | (type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) { |
239 | int count = type == SCM_TIMESTAMPNS ? 1 : 3; |
240 | int i; |
241 | struct timespec *ts = (struct timespec *)data; |
242 | for (i = 0; i < count; i++) { |
243 | cts[i].tv_sec = ts[i].tv_sec; |
244 | cts[i].tv_nsec = ts[i].tv_nsec; |
245 | } |
246 | data = &cts; |
247 | len = sizeof(cts[0]) * count; |
248 | } |
249 | |
250 | cmlen = CMSG_COMPAT_LEN(len); |
251 | if (kmsg->msg_controllen < cmlen) { |
252 | kmsg->msg_flags |= MSG_CTRUNC; |
253 | cmlen = kmsg->msg_controllen; |
254 | } |
255 | cmhdr.cmsg_level = level; |
256 | cmhdr.cmsg_type = type; |
257 | cmhdr.cmsg_len = cmlen; |
258 | |
259 | if (copy_to_user(cm, &cmhdr, sizeof cmhdr)) |
260 | return -EFAULT; |
261 | if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr))) |
262 | return -EFAULT; |
263 | cmlen = CMSG_COMPAT_SPACE(len); |
264 | if (kmsg->msg_controllen < cmlen) |
265 | cmlen = kmsg->msg_controllen; |
266 | kmsg->msg_control += cmlen; |
267 | kmsg->msg_controllen -= cmlen; |
268 | return 0; |
269 | } |
270 | |
271 | void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm) |
272 | { |
273 | struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; |
274 | int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int); |
275 | int fdnum = scm->fp->count; |
276 | struct file **fp = scm->fp->fp; |
277 | int __user *cmfptr; |
278 | int err = 0, i; |
279 | |
280 | if (fdnum < fdmax) |
281 | fdmax = fdnum; |
282 | |
283 | for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) { |
284 | int new_fd; |
285 | err = security_file_receive(fp[i]); |
286 | if (err) |
287 | break; |
288 | err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags |
289 | ? O_CLOEXEC : 0); |
290 | if (err < 0) |
291 | break; |
292 | new_fd = err; |
293 | err = put_user(new_fd, cmfptr); |
294 | if (err) { |
295 | put_unused_fd(new_fd); |
296 | break; |
297 | } |
298 | /* Bump the usage count and install the file. */ |
299 | get_file(fp[i]); |
300 | fd_install(new_fd, fp[i]); |
301 | } |
302 | |
303 | if (i > 0) { |
304 | int cmlen = CMSG_COMPAT_LEN(i * sizeof(int)); |
305 | err = put_user(SOL_SOCKET, &cm->cmsg_level); |
306 | if (!err) |
307 | err = put_user(SCM_RIGHTS, &cm->cmsg_type); |
308 | if (!err) |
309 | err = put_user(cmlen, &cm->cmsg_len); |
310 | if (!err) { |
311 | cmlen = CMSG_COMPAT_SPACE(i * sizeof(int)); |
312 | kmsg->msg_control += cmlen; |
313 | kmsg->msg_controllen -= cmlen; |
314 | } |
315 | } |
316 | if (i < fdnum) |
317 | kmsg->msg_flags |= MSG_CTRUNC; |
318 | |
319 | /* |
320 | * All of the files that fit in the message have had their |
321 | * usage counts incremented, so we just free the list. |
322 | */ |
323 | __scm_destroy(scm); |
324 | } |
325 | |
326 | /* |
327 | * A struct sock_filter is architecture independent. |
328 | */ |
329 | struct compat_sock_fprog { |
330 | u16 len; |
331 | compat_uptr_t filter; /* struct sock_filter * */ |
332 | }; |
333 | |
334 | static int do_set_attach_filter(struct socket *sock, int level, int optname, |
335 | char __user *optval, unsigned int optlen) |
336 | { |
337 | struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval; |
338 | struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog)); |
339 | compat_uptr_t ptr; |
340 | u16 len; |
341 | |
342 | if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) || |
343 | !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) || |
344 | __get_user(len, &fprog32->len) || |
345 | __get_user(ptr, &fprog32->filter) || |
346 | __put_user(len, &kfprog->len) || |
347 | __put_user(compat_ptr(ptr), &kfprog->filter)) |
348 | return -EFAULT; |
349 | |
350 | return sock_setsockopt(sock, level, optname, (char __user *)kfprog, |
351 | sizeof(struct sock_fprog)); |
352 | } |
353 | |
354 | static int do_set_sock_timeout(struct socket *sock, int level, |
355 | int optname, char __user *optval, unsigned int optlen) |
356 | { |
357 | struct compat_timeval __user *up = (struct compat_timeval __user *) optval; |
358 | struct timeval ktime; |
359 | mm_segment_t old_fs; |
360 | int err; |
361 | |
362 | if (optlen < sizeof(*up)) |
363 | return -EINVAL; |
364 | if (!access_ok(VERIFY_READ, up, sizeof(*up)) || |
365 | __get_user(ktime.tv_sec, &up->tv_sec) || |
366 | __get_user(ktime.tv_usec, &up->tv_usec)) |
367 | return -EFAULT; |
368 | old_fs = get_fs(); |
369 | set_fs(KERNEL_DS); |
370 | err = sock_setsockopt(sock, level, optname, (char *) &ktime, sizeof(ktime)); |
371 | set_fs(old_fs); |
372 | |
373 | return err; |
374 | } |
375 | |
376 | static int compat_sock_setsockopt(struct socket *sock, int level, int optname, |
377 | char __user *optval, unsigned int optlen) |
378 | { |
379 | if (optname == SO_ATTACH_FILTER) |
380 | return do_set_attach_filter(sock, level, optname, |
381 | optval, optlen); |
382 | if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) |
383 | return do_set_sock_timeout(sock, level, optname, optval, optlen); |
384 | |
385 | return sock_setsockopt(sock, level, optname, optval, optlen); |
386 | } |
387 | |
388 | asmlinkage long compat_sys_setsockopt(int fd, int level, int optname, |
389 | char __user *optval, unsigned int optlen) |
390 | { |
391 | int err; |
392 | struct socket *sock; |
393 | |
394 | if ((sock = sockfd_lookup(fd, &err))!=NULL) |
395 | { |
396 | err = security_socket_setsockopt(sock,level,optname); |
397 | if (err) { |
398 | sockfd_put(sock); |
399 | return err; |
400 | } |
401 | |
402 | if (level == SOL_SOCKET) |
403 | err = compat_sock_setsockopt(sock, level, |
404 | optname, optval, optlen); |
405 | else if (sock->ops->compat_setsockopt) |
406 | err = sock->ops->compat_setsockopt(sock, level, |
407 | optname, optval, optlen); |
408 | else |
409 | err = sock->ops->setsockopt(sock, level, |
410 | optname, optval, optlen); |
411 | sockfd_put(sock); |
412 | } |
413 | return err; |
414 | } |
415 | |
416 | static int do_get_sock_timeout(struct socket *sock, int level, int optname, |
417 | char __user *optval, int __user *optlen) |
418 | { |
419 | struct compat_timeval __user *up; |
420 | struct timeval ktime; |
421 | mm_segment_t old_fs; |
422 | int len, err; |
423 | |
424 | up = (struct compat_timeval __user *) optval; |
425 | if (get_user(len, optlen)) |
426 | return -EFAULT; |
427 | if (len < sizeof(*up)) |
428 | return -EINVAL; |
429 | len = sizeof(ktime); |
430 | old_fs = get_fs(); |
431 | set_fs(KERNEL_DS); |
432 | err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len); |
433 | set_fs(old_fs); |
434 | |
435 | if (!err) { |
436 | if (put_user(sizeof(*up), optlen) || |
437 | !access_ok(VERIFY_WRITE, up, sizeof(*up)) || |
438 | __put_user(ktime.tv_sec, &up->tv_sec) || |
439 | __put_user(ktime.tv_usec, &up->tv_usec)) |
440 | err = -EFAULT; |
441 | } |
442 | return err; |
443 | } |
444 | |
445 | static int compat_sock_getsockopt(struct socket *sock, int level, int optname, |
446 | char __user *optval, int __user *optlen) |
447 | { |
448 | if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) |
449 | return do_get_sock_timeout(sock, level, optname, optval, optlen); |
450 | return sock_getsockopt(sock, level, optname, optval, optlen); |
451 | } |
452 | |
453 | int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp) |
454 | { |
455 | struct compat_timeval __user *ctv = |
456 | (struct compat_timeval __user*) userstamp; |
457 | int err = -ENOENT; |
458 | struct timeval tv; |
459 | |
460 | if (!sock_flag(sk, SOCK_TIMESTAMP)) |
461 | sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
462 | tv = ktime_to_timeval(sk->sk_stamp); |
463 | if (tv.tv_sec == -1) |
464 | return err; |
465 | if (tv.tv_sec == 0) { |
466 | sk->sk_stamp = ktime_get_real(); |
467 | tv = ktime_to_timeval(sk->sk_stamp); |
468 | } |
469 | err = 0; |
470 | if (put_user(tv.tv_sec, &ctv->tv_sec) || |
471 | put_user(tv.tv_usec, &ctv->tv_usec)) |
472 | err = -EFAULT; |
473 | return err; |
474 | } |
475 | EXPORT_SYMBOL(compat_sock_get_timestamp); |
476 | |
477 | int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp) |
478 | { |
479 | struct compat_timespec __user *ctv = |
480 | (struct compat_timespec __user*) userstamp; |
481 | int err = -ENOENT; |
482 | struct timespec ts; |
483 | |
484 | if (!sock_flag(sk, SOCK_TIMESTAMP)) |
485 | sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
486 | ts = ktime_to_timespec(sk->sk_stamp); |
487 | if (ts.tv_sec == -1) |
488 | return err; |
489 | if (ts.tv_sec == 0) { |
490 | sk->sk_stamp = ktime_get_real(); |
491 | ts = ktime_to_timespec(sk->sk_stamp); |
492 | } |
493 | err = 0; |
494 | if (put_user(ts.tv_sec, &ctv->tv_sec) || |
495 | put_user(ts.tv_nsec, &ctv->tv_nsec)) |
496 | err = -EFAULT; |
497 | return err; |
498 | } |
499 | EXPORT_SYMBOL(compat_sock_get_timestampns); |
500 | |
501 | asmlinkage long compat_sys_getsockopt(int fd, int level, int optname, |
502 | char __user *optval, int __user *optlen) |
503 | { |
504 | int err; |
505 | struct socket *sock; |
506 | |
507 | if ((sock = sockfd_lookup(fd, &err))!=NULL) |
508 | { |
509 | err = security_socket_getsockopt(sock, level, |
510 | 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 | } __attribute__ ((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 | } __attribute__ ((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 | } __attribute__ ((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 | |
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 | |
723 | EXPORT_SYMBOL(compat_mc_getsockopt); |
724 | |
725 | |
726 | /* Argument list sizes for compat_sys_socketcall */ |
727 | #define AL(x) ((x) * sizeof(u32)) |
728 | static unsigned char nas[20]={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)}; |
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_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags) |
740 | { |
741 | return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); |
742 | } |
743 | |
744 | asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len, unsigned flags) |
745 | { |
746 | return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT); |
747 | } |
748 | |
749 | asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, size_t len, |
750 | unsigned flags, struct sockaddr __user *addr, |
751 | int __user *addrlen) |
752 | { |
753 | return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen); |
754 | } |
755 | |
756 | asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg, |
757 | unsigned vlen, unsigned int flags, |
758 | struct compat_timespec __user *timeout) |
759 | { |
760 | int datagrams; |
761 | struct timespec ktspec; |
762 | |
763 | if (timeout == NULL) |
764 | return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, |
765 | flags | MSG_CMSG_COMPAT, NULL); |
766 | |
767 | if (get_compat_timespec(&ktspec, timeout)) |
768 | return -EFAULT; |
769 | |
770 | datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, |
771 | flags | MSG_CMSG_COMPAT, &ktspec); |
772 | if (datagrams > 0 && put_compat_timespec(&ktspec, timeout)) |
773 | datagrams = -EFAULT; |
774 | |
775 | return datagrams; |
776 | } |
777 | |
778 | asmlinkage long compat_sys_socketcall(int call, u32 __user *args) |
779 | { |
780 | int ret; |
781 | u32 a[6]; |
782 | u32 a0, a1; |
783 | |
784 | if (call < SYS_SOCKET || call > SYS_RECVMMSG) |
785 | return -EINVAL; |
786 | if (copy_from_user(a, args, nas[call])) |
787 | return -EFAULT; |
788 | a0 = a[0]; |
789 | a1 = a[1]; |
790 | |
791 | switch (call) { |
792 | case SYS_SOCKET: |
793 | ret = sys_socket(a0, a1, a[2]); |
794 | break; |
795 | case SYS_BIND: |
796 | ret = sys_bind(a0, compat_ptr(a1), a[2]); |
797 | break; |
798 | case SYS_CONNECT: |
799 | ret = sys_connect(a0, compat_ptr(a1), a[2]); |
800 | break; |
801 | case SYS_LISTEN: |
802 | ret = sys_listen(a0, a1); |
803 | break; |
804 | case SYS_ACCEPT: |
805 | ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0); |
806 | break; |
807 | case SYS_GETSOCKNAME: |
808 | ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2])); |
809 | break; |
810 | case SYS_GETPEERNAME: |
811 | ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2])); |
812 | break; |
813 | case SYS_SOCKETPAIR: |
814 | ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3])); |
815 | break; |
816 | case SYS_SEND: |
817 | ret = sys_send(a0, compat_ptr(a1), a[2], a[3]); |
818 | break; |
819 | case SYS_SENDTO: |
820 | ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]); |
821 | break; |
822 | case SYS_RECV: |
823 | ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]); |
824 | break; |
825 | case SYS_RECVFROM: |
826 | ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], |
827 | compat_ptr(a[4]), compat_ptr(a[5])); |
828 | break; |
829 | case SYS_SHUTDOWN: |
830 | ret = sys_shutdown(a0,a1); |
831 | break; |
832 | case SYS_SETSOCKOPT: |
833 | ret = compat_sys_setsockopt(a0, a1, a[2], |
834 | compat_ptr(a[3]), a[4]); |
835 | break; |
836 | case SYS_GETSOCKOPT: |
837 | ret = compat_sys_getsockopt(a0, a1, a[2], |
838 | compat_ptr(a[3]), compat_ptr(a[4])); |
839 | break; |
840 | case SYS_SENDMSG: |
841 | ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]); |
842 | break; |
843 | case SYS_RECVMSG: |
844 | ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]); |
845 | break; |
846 | case SYS_RECVMMSG: |
847 | ret = compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3], |
848 | compat_ptr(a[4])); |
849 | break; |
850 | case SYS_ACCEPT4: |
851 | ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]); |
852 | break; |
853 | default: |
854 | ret = -EINVAL; |
855 | break; |
856 | } |
857 | return ret; |
858 | } |
859 |
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