Commit | Line | Data |
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457c8996 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
4768fbcb | 2 | /* |
1da177e4 LT |
3 | * 32bit Socket syscall emulation. Based on arch/sparc64/kernel/sys_sparc32.c. |
4 | * | |
5 | * Copyright (C) 2000 VA Linux Co | |
6 | * Copyright (C) 2000 Don Dugger <n0ano@valinux.com> | |
7 | * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com> | |
8 | * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) | |
9 | * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu) | |
10 | * Copyright (C) 2000 Hewlett-Packard Co. | |
11 | * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com> | |
4768fbcb | 12 | * Copyright (C) 2000,2001 Andi Kleen, SuSE Labs |
1da177e4 LT |
13 | */ |
14 | ||
15 | #include <linux/kernel.h> | |
5a0e3ad6 | 16 | #include <linux/gfp.h> |
1da177e4 | 17 | #include <linux/fs.h> |
1da177e4 LT |
18 | #include <linux/types.h> |
19 | #include <linux/file.h> | |
20 | #include <linux/icmpv6.h> | |
21 | #include <linux/socket.h> | |
22 | #include <linux/syscalls.h> | |
23 | #include <linux/filter.h> | |
24 | #include <linux/compat.h> | |
1da177e4 | 25 | #include <linux/security.h> |
62bc306e | 26 | #include <linux/audit.h> |
bc3b2d7f | 27 | #include <linux/export.h> |
1da177e4 LT |
28 | |
29 | #include <net/scm.h> | |
30 | #include <net/sock.h> | |
dae50295 DS |
31 | #include <net/ip.h> |
32 | #include <net/ipv6.h> | |
7c0f6ba6 | 33 | #include <linux/uaccess.h> |
1da177e4 LT |
34 | #include <net/compat.h> |
35 | ||
0a384abf JA |
36 | int __get_compat_msghdr(struct msghdr *kmsg, |
37 | struct compat_msghdr __user *umsg, | |
38 | struct sockaddr __user **save_addr, | |
39 | compat_uptr_t *ptr, compat_size_t *len) | |
1da177e4 | 40 | { |
5da028a8 | 41 | struct compat_msghdr msg; |
08adb7da | 42 | ssize_t err; |
1da177e4 | 43 | |
5da028a8 | 44 | if (copy_from_user(&msg, umsg, sizeof(*umsg))) |
1da177e4 | 45 | return -EFAULT; |
91edd096 | 46 | |
5da028a8 AV |
47 | kmsg->msg_flags = msg.msg_flags; |
48 | kmsg->msg_namelen = msg.msg_namelen; | |
49 | ||
50 | if (!msg.msg_name) | |
91edd096 CM |
51 | kmsg->msg_namelen = 0; |
52 | ||
53 | if (kmsg->msg_namelen < 0) | |
54 | return -EINVAL; | |
55 | ||
1661bf36 | 56 | if (kmsg->msg_namelen > sizeof(struct sockaddr_storage)) |
db31c55a | 57 | kmsg->msg_namelen = sizeof(struct sockaddr_storage); |
5da028a8 AV |
58 | |
59 | kmsg->msg_control = compat_ptr(msg.msg_control); | |
60 | kmsg->msg_controllen = msg.msg_controllen; | |
1da177e4 | 61 | |
08adb7da | 62 | if (save_addr) |
5da028a8 | 63 | *save_addr = compat_ptr(msg.msg_name); |
1da177e4 | 64 | |
5da028a8 | 65 | if (msg.msg_name && kmsg->msg_namelen) { |
08adb7da | 66 | if (!save_addr) { |
5da028a8 | 67 | err = move_addr_to_kernel(compat_ptr(msg.msg_name), |
08adb7da AV |
68 | kmsg->msg_namelen, |
69 | kmsg->msg_name); | |
e71a4783 | 70 | if (err < 0) |
1da177e4 LT |
71 | return err; |
72 | } | |
40eea803 | 73 | } else { |
08adb7da AV |
74 | kmsg->msg_name = NULL; |
75 | kmsg->msg_namelen = 0; | |
40eea803 | 76 | } |
1da177e4 | 77 | |
5da028a8 | 78 | if (msg.msg_iovlen > UIO_MAXIOV) |
08449320 AV |
79 | return -EMSGSIZE; |
80 | ||
0345f931 | 81 | kmsg->msg_iocb = NULL; |
0a384abf JA |
82 | *ptr = msg.msg_iov; |
83 | *len = msg.msg_iovlen; | |
84 | return 0; | |
85 | } | |
86 | ||
87 | int get_compat_msghdr(struct msghdr *kmsg, | |
88 | struct compat_msghdr __user *umsg, | |
89 | struct sockaddr __user **save_addr, | |
90 | struct iovec **iov) | |
91 | { | |
92 | compat_uptr_t ptr; | |
93 | compat_size_t len; | |
94 | ssize_t err; | |
95 | ||
96 | err = __get_compat_msghdr(kmsg, umsg, save_addr, &ptr, &len); | |
97 | if (err) | |
98 | return err; | |
0345f931 | 99 | |
0a384abf JA |
100 | err = compat_import_iovec(save_addr ? READ : WRITE, compat_ptr(ptr), |
101 | len, UIO_FASTIOV, iov, &kmsg->msg_iter); | |
87e5e6da | 102 | return err < 0 ? err : 0; |
1da177e4 LT |
103 | } |
104 | ||
105 | /* Bleech... */ | |
106 | #define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32)) | |
107 | ||
108 | #define CMSG_COMPAT_DATA(cmsg) \ | |
1ff8cebf | 109 | ((void __user *)((char __user *)(cmsg) + sizeof(struct compat_cmsghdr))) |
1da177e4 | 110 | #define CMSG_COMPAT_SPACE(len) \ |
1ff8cebf | 111 | (sizeof(struct compat_cmsghdr) + CMSG_COMPAT_ALIGN(len)) |
1da177e4 | 112 | #define CMSG_COMPAT_LEN(len) \ |
1ff8cebf | 113 | (sizeof(struct compat_cmsghdr) + (len)) |
1da177e4 LT |
114 | |
115 | #define CMSG_COMPAT_FIRSTHDR(msg) \ | |
116 | (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \ | |
117 | (struct compat_cmsghdr __user *)((msg)->msg_control) : \ | |
118 | (struct compat_cmsghdr __user *)NULL) | |
119 | ||
120 | #define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \ | |
121 | ((ucmlen) >= sizeof(struct compat_cmsghdr) && \ | |
122 | (ucmlen) <= (unsigned long) \ | |
123 | ((mhdr)->msg_controllen - \ | |
124 | ((char *)(ucmsg) - (char *)(mhdr)->msg_control))) | |
125 | ||
126 | static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg, | |
127 | struct compat_cmsghdr __user *cmsg, int cmsg_len) | |
128 | { | |
129 | char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len); | |
130 | if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) > | |
131 | msg->msg_controllen) | |
132 | return NULL; | |
133 | return (struct compat_cmsghdr __user *)ptr; | |
134 | } | |
135 | ||
136 | /* There is a lot of hair here because the alignment rules (and | |
137 | * thus placement) of cmsg headers and length are different for | |
138 | * 32-bit apps. -DaveM | |
139 | */ | |
8920e8f9 | 140 | int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk, |
1da177e4 LT |
141 | unsigned char *stackbuf, int stackbuf_size) |
142 | { | |
143 | struct compat_cmsghdr __user *ucmsg; | |
144 | struct cmsghdr *kcmsg, *kcmsg_base; | |
145 | compat_size_t ucmlen; | |
146 | __kernel_size_t kcmlen, tmp; | |
8920e8f9 | 147 | int err = -EFAULT; |
1da177e4 | 148 | |
ac4340fc DM |
149 | BUILD_BUG_ON(sizeof(struct compat_cmsghdr) != |
150 | CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr))); | |
151 | ||
1da177e4 LT |
152 | kcmlen = 0; |
153 | kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf; | |
154 | ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); | |
e71a4783 SH |
155 | while (ucmsg != NULL) { |
156 | if (get_user(ucmlen, &ucmsg->cmsg_len)) | |
1da177e4 LT |
157 | return -EFAULT; |
158 | ||
159 | /* Catch bogons. */ | |
160 | if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) | |
161 | return -EINVAL; | |
162 | ||
1ff8cebf | 163 | tmp = ((ucmlen - sizeof(*ucmsg)) + sizeof(struct cmsghdr)); |
8920e8f9 | 164 | tmp = CMSG_ALIGN(tmp); |
1da177e4 LT |
165 | kcmlen += tmp; |
166 | ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); | |
167 | } | |
e71a4783 | 168 | if (kcmlen == 0) |
1da177e4 LT |
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 | */ | |
8920e8f9 AV |
176 | if (kcmlen > stackbuf_size) |
177 | kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL); | |
178 | if (kcmsg == NULL) | |
1da177e4 LT |
179 | return -ENOBUFS; |
180 | ||
181 | /* Now copy them over neatly. */ | |
182 | memset(kcmsg, 0, kcmlen); | |
183 | ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); | |
e71a4783 | 184 | while (ucmsg != NULL) { |
8920e8f9 AV |
185 | if (__get_user(ucmlen, &ucmsg->cmsg_len)) |
186 | goto Efault; | |
187 | if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) | |
188 | goto Einval; | |
1ff8cebf | 189 | tmp = ((ucmlen - sizeof(*ucmsg)) + sizeof(struct cmsghdr)); |
8920e8f9 AV |
190 | if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp)) |
191 | goto Einval; | |
1da177e4 | 192 | kcmsg->cmsg_len = tmp; |
8920e8f9 AV |
193 | tmp = CMSG_ALIGN(tmp); |
194 | if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) || | |
195 | __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) || | |
196 | copy_from_user(CMSG_DATA(kcmsg), | |
197 | CMSG_COMPAT_DATA(ucmsg), | |
1ff8cebf | 198 | (ucmlen - sizeof(*ucmsg)))) |
8920e8f9 | 199 | goto Efault; |
1da177e4 LT |
200 | |
201 | /* Advance. */ | |
8920e8f9 | 202 | kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp); |
1da177e4 LT |
203 | ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); |
204 | } | |
205 | ||
c2a64bb9 MX |
206 | /* |
207 | * check the length of messages copied in is the same as the | |
208 | * what we get from the first loop | |
209 | */ | |
210 | if ((char *)kcmsg - (char *)kcmsg_base != kcmlen) | |
211 | goto Einval; | |
212 | ||
1da177e4 LT |
213 | /* Ok, looks like we made it. Hook it up and return success. */ |
214 | kmsg->msg_control = kcmsg_base; | |
215 | kmsg->msg_controllen = kcmlen; | |
216 | return 0; | |
217 | ||
8920e8f9 AV |
218 | Einval: |
219 | err = -EINVAL; | |
220 | Efault: | |
221 | if (kcmsg_base != (struct cmsghdr *)stackbuf) | |
222 | sock_kfree_s(sk, kcmsg_base, kcmlen); | |
223 | return err; | |
1da177e4 LT |
224 | } |
225 | ||
226 | int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data) | |
227 | { | |
1da177e4 LT |
228 | struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; |
229 | struct compat_cmsghdr cmhdr; | |
13c6ee2a DD |
230 | struct old_timeval32 ctv; |
231 | struct old_timespec32 cts[3]; | |
1da177e4 LT |
232 | int cmlen; |
233 | ||
e71a4783 | 234 | if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) { |
1da177e4 LT |
235 | kmsg->msg_flags |= MSG_CTRUNC; |
236 | return 0; /* XXX: return error? check spec. */ | |
237 | } | |
238 | ||
ee4fa23c | 239 | if (!COMPAT_USE_64BIT_TIME) { |
7f1bc6e9 | 240 | if (level == SOL_SOCKET && type == SO_TIMESTAMP_OLD) { |
13c6ee2a | 241 | struct __kernel_old_timeval *tv = (struct __kernel_old_timeval *)data; |
ee4fa23c L |
242 | ctv.tv_sec = tv->tv_sec; |
243 | ctv.tv_usec = tv->tv_usec; | |
244 | data = &ctv; | |
245 | len = sizeof(ctv); | |
246 | } | |
247 | if (level == SOL_SOCKET && | |
7f1bc6e9 DD |
248 | (type == SO_TIMESTAMPNS_OLD || type == SO_TIMESTAMPING_OLD)) { |
249 | int count = type == SO_TIMESTAMPNS_OLD ? 1 : 3; | |
ee4fa23c | 250 | int i; |
df1b4ba9 | 251 | struct __kernel_old_timespec *ts = data; |
ee4fa23c L |
252 | for (i = 0; i < count; i++) { |
253 | cts[i].tv_sec = ts[i].tv_sec; | |
254 | cts[i].tv_nsec = ts[i].tv_nsec; | |
255 | } | |
256 | data = &cts; | |
257 | len = sizeof(cts[0]) * count; | |
20d49473 | 258 | } |
4768fbcb YH |
259 | } |
260 | ||
1da177e4 | 261 | cmlen = CMSG_COMPAT_LEN(len); |
e71a4783 | 262 | if (kmsg->msg_controllen < cmlen) { |
1da177e4 LT |
263 | kmsg->msg_flags |= MSG_CTRUNC; |
264 | cmlen = kmsg->msg_controllen; | |
265 | } | |
266 | cmhdr.cmsg_level = level; | |
267 | cmhdr.cmsg_type = type; | |
268 | cmhdr.cmsg_len = cmlen; | |
269 | ||
e71a4783 | 270 | if (copy_to_user(cm, &cmhdr, sizeof cmhdr)) |
1da177e4 | 271 | return -EFAULT; |
e71a4783 | 272 | if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr))) |
1da177e4 LT |
273 | return -EFAULT; |
274 | cmlen = CMSG_COMPAT_SPACE(len); | |
1ac70e7a WY |
275 | if (kmsg->msg_controllen < cmlen) |
276 | cmlen = kmsg->msg_controllen; | |
1da177e4 LT |
277 | kmsg->msg_control += cmlen; |
278 | kmsg->msg_controllen -= cmlen; | |
279 | return 0; | |
280 | } | |
281 | ||
282 | void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm) | |
283 | { | |
284 | struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; | |
285 | int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int); | |
286 | int fdnum = scm->fp->count; | |
287 | struct file **fp = scm->fp->fp; | |
288 | int __user *cmfptr; | |
289 | int err = 0, i; | |
290 | ||
291 | if (fdnum < fdmax) | |
292 | fdmax = fdnum; | |
293 | ||
294 | for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) { | |
295 | int new_fd; | |
296 | err = security_file_receive(fp[i]); | |
297 | if (err) | |
298 | break; | |
4a19542e UD |
299 | err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags |
300 | ? O_CLOEXEC : 0); | |
1da177e4 LT |
301 | if (err < 0) |
302 | break; | |
303 | new_fd = err; | |
304 | err = put_user(new_fd, cmfptr); | |
305 | if (err) { | |
306 | put_unused_fd(new_fd); | |
307 | break; | |
308 | } | |
309 | /* Bump the usage count and install the file. */ | |
cb0942b8 | 310 | fd_install(new_fd, get_file(fp[i])); |
1da177e4 LT |
311 | } |
312 | ||
313 | if (i > 0) { | |
314 | int cmlen = CMSG_COMPAT_LEN(i * sizeof(int)); | |
effee6a0 | 315 | err = put_user(SOL_SOCKET, &cm->cmsg_level); |
1da177e4 LT |
316 | if (!err) |
317 | err = put_user(SCM_RIGHTS, &cm->cmsg_type); | |
318 | if (!err) | |
319 | err = put_user(cmlen, &cm->cmsg_len); | |
320 | if (!err) { | |
321 | cmlen = CMSG_COMPAT_SPACE(i * sizeof(int)); | |
322 | kmsg->msg_control += cmlen; | |
323 | kmsg->msg_controllen -= cmlen; | |
324 | } | |
325 | } | |
326 | if (i < fdnum) | |
327 | kmsg->msg_flags |= MSG_CTRUNC; | |
328 | ||
329 | /* | |
330 | * All of the files that fit in the message have had their | |
331 | * usage counts incremented, so we just free the list. | |
332 | */ | |
333 | __scm_destroy(scm); | |
334 | } | |
335 | ||
719c44d3 WB |
336 | /* allocate a 64-bit sock_fprog on the user stack for duration of syscall. */ |
337 | struct sock_fprog __user *get_compat_bpf_fprog(char __user *optval) | |
1da177e4 LT |
338 | { |
339 | struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval; | |
4768fbcb | 340 | struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog)); |
f8f8a727 AV |
341 | struct compat_sock_fprog f32; |
342 | struct sock_fprog f; | |
343 | ||
344 | if (copy_from_user(&f32, fprog32, sizeof(*fprog32))) | |
345 | return NULL; | |
346 | memset(&f, 0, sizeof(f)); | |
347 | f.len = f32.len; | |
348 | f.filter = compat_ptr(f32.filter); | |
349 | if (copy_to_user(kfprog, &f, sizeof(struct sock_fprog))) | |
719c44d3 WB |
350 | return NULL; |
351 | ||
352 | return kfprog; | |
353 | } | |
354 | EXPORT_SYMBOL_GPL(get_compat_bpf_fprog); | |
355 | ||
356 | static int do_set_attach_filter(struct socket *sock, int level, int optname, | |
357 | char __user *optval, unsigned int optlen) | |
358 | { | |
359 | struct sock_fprog __user *kfprog; | |
360 | ||
361 | kfprog = get_compat_bpf_fprog(optval); | |
362 | if (!kfprog) | |
1da177e4 LT |
363 | return -EFAULT; |
364 | ||
3fdadf7d | 365 | return sock_setsockopt(sock, level, optname, (char __user *)kfprog, |
1da177e4 LT |
366 | sizeof(struct sock_fprog)); |
367 | } | |
368 | ||
3fdadf7d | 369 | static int compat_sock_setsockopt(struct socket *sock, int level, int optname, |
b7058842 | 370 | char __user *optval, unsigned int optlen) |
3fdadf7d | 371 | { |
19575988 HD |
372 | if (optname == SO_ATTACH_FILTER || |
373 | optname == SO_ATTACH_REUSEPORT_CBPF) | |
3fdadf7d DM |
374 | return do_set_attach_filter(sock, level, optname, |
375 | optval, optlen); | |
3fdadf7d DM |
376 | return sock_setsockopt(sock, level, optname, optval, optlen); |
377 | } | |
378 | ||
73ee3eaf DB |
379 | static int __compat_sys_setsockopt(int fd, int level, int optname, |
380 | char __user *optval, unsigned int optlen) | |
1da177e4 | 381 | { |
3fdadf7d | 382 | int err; |
52baf987 | 383 | struct socket *sock; |
3fdadf7d | 384 | |
52baf987 JH |
385 | if (optlen > INT_MAX) |
386 | return -EINVAL; | |
387 | ||
388 | sock = sockfd_lookup(fd, &err); | |
c6d409cf ED |
389 | if (sock) { |
390 | err = security_socket_setsockopt(sock, level, optname); | |
3fdadf7d DM |
391 | if (err) { |
392 | sockfd_put(sock); | |
393 | return err; | |
394 | } | |
395 | ||
396 | if (level == SOL_SOCKET) | |
397 | err = compat_sock_setsockopt(sock, level, | |
398 | optname, optval, optlen); | |
399 | else if (sock->ops->compat_setsockopt) | |
400 | err = sock->ops->compat_setsockopt(sock, level, | |
401 | optname, optval, optlen); | |
402 | else | |
403 | err = sock->ops->setsockopt(sock, level, | |
404 | optname, optval, optlen); | |
405 | sockfd_put(sock); | |
406 | } | |
407 | return err; | |
1da177e4 LT |
408 | } |
409 | ||
73ee3eaf DB |
410 | COMPAT_SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
411 | char __user *, optval, unsigned int, optlen) | |
412 | { | |
413 | return __compat_sys_setsockopt(fd, level, optname, optval, optlen); | |
414 | } | |
415 | ||
8770cf4a DB |
416 | static int __compat_sys_getsockopt(int fd, int level, int optname, |
417 | char __user *optval, | |
418 | int __user *optlen) | |
3fdadf7d DM |
419 | { |
420 | int err; | |
c6d409cf | 421 | struct socket *sock = sockfd_lookup(fd, &err); |
3fdadf7d | 422 | |
c6d409cf ED |
423 | if (sock) { |
424 | err = security_socket_getsockopt(sock, level, optname); | |
3fdadf7d DM |
425 | if (err) { |
426 | sockfd_put(sock); | |
427 | return err; | |
428 | } | |
429 | ||
430 | if (level == SOL_SOCKET) | |
fe0c72f3 | 431 | err = sock_getsockopt(sock, level, |
3fdadf7d DM |
432 | optname, optval, optlen); |
433 | else if (sock->ops->compat_getsockopt) | |
434 | err = sock->ops->compat_getsockopt(sock, level, | |
435 | optname, optval, optlen); | |
436 | else | |
437 | err = sock->ops->getsockopt(sock, level, | |
438 | optname, optval, optlen); | |
439 | sockfd_put(sock); | |
440 | } | |
441 | return err; | |
442 | } | |
dae50295 | 443 | |
8770cf4a DB |
444 | COMPAT_SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
445 | char __user *, optval, int __user *, optlen) | |
446 | { | |
447 | return __compat_sys_getsockopt(fd, level, optname, optval, optlen); | |
448 | } | |
449 | ||
dae50295 DS |
450 | struct compat_group_req { |
451 | __u32 gr_interface; | |
452 | struct __kernel_sockaddr_storage gr_group | |
e099b2d9 | 453 | __aligned(4); |
bc10502d | 454 | } __packed; |
dae50295 DS |
455 | |
456 | struct compat_group_source_req { | |
457 | __u32 gsr_interface; | |
458 | struct __kernel_sockaddr_storage gsr_group | |
e099b2d9 | 459 | __aligned(4); |
dae50295 | 460 | struct __kernel_sockaddr_storage gsr_source |
e099b2d9 | 461 | __aligned(4); |
bc10502d | 462 | } __packed; |
dae50295 DS |
463 | |
464 | struct compat_group_filter { | |
465 | __u32 gf_interface; | |
466 | struct __kernel_sockaddr_storage gf_group | |
e099b2d9 | 467 | __aligned(4); |
dae50295 DS |
468 | __u32 gf_fmode; |
469 | __u32 gf_numsrc; | |
470 | struct __kernel_sockaddr_storage gf_slist[1] | |
e099b2d9 | 471 | __aligned(4); |
bc10502d | 472 | } __packed; |
dae50295 | 473 | |
be666e0a DS |
474 | #define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \ |
475 | sizeof(struct __kernel_sockaddr_storage)) | |
476 | ||
dae50295 DS |
477 | |
478 | int compat_mc_setsockopt(struct sock *sock, int level, int optname, | |
b7058842 | 479 | char __user *optval, unsigned int optlen, |
c6d409cf | 480 | int (*setsockopt)(struct sock *, int, int, char __user *, unsigned int)) |
dae50295 DS |
481 | { |
482 | char __user *koptval = optval; | |
483 | int koptlen = optlen; | |
484 | ||
485 | switch (optname) { | |
486 | case MCAST_JOIN_GROUP: | |
487 | case MCAST_LEAVE_GROUP: | |
488 | { | |
46d84110 | 489 | struct compat_group_req __user *gr32 = (void __user *)optval; |
dae50295 DS |
490 | struct group_req __user *kgr = |
491 | compat_alloc_user_space(sizeof(struct group_req)); | |
492 | u32 interface; | |
493 | ||
96d4f267 LT |
494 | if (!access_ok(gr32, sizeof(*gr32)) || |
495 | !access_ok(kgr, sizeof(struct group_req)) || | |
dae50295 DS |
496 | __get_user(interface, &gr32->gr_interface) || |
497 | __put_user(interface, &kgr->gr_interface) || | |
498 | copy_in_user(&kgr->gr_group, &gr32->gr_group, | |
499 | sizeof(kgr->gr_group))) | |
500 | return -EFAULT; | |
501 | koptval = (char __user *)kgr; | |
502 | koptlen = sizeof(struct group_req); | |
503 | break; | |
504 | } | |
505 | case MCAST_JOIN_SOURCE_GROUP: | |
506 | case MCAST_LEAVE_SOURCE_GROUP: | |
507 | case MCAST_BLOCK_SOURCE: | |
508 | case MCAST_UNBLOCK_SOURCE: | |
509 | { | |
46d84110 | 510 | struct compat_group_source_req __user *gsr32 = (void __user *)optval; |
be666e0a | 511 | struct group_source_req __user *kgsr = compat_alloc_user_space( |
dae50295 DS |
512 | sizeof(struct group_source_req)); |
513 | u32 interface; | |
514 | ||
96d4f267 LT |
515 | if (!access_ok(gsr32, sizeof(*gsr32)) || |
516 | !access_ok(kgsr, | |
dae50295 DS |
517 | sizeof(struct group_source_req)) || |
518 | __get_user(interface, &gsr32->gsr_interface) || | |
519 | __put_user(interface, &kgsr->gsr_interface) || | |
520 | copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group, | |
521 | sizeof(kgsr->gsr_group)) || | |
522 | copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source, | |
523 | sizeof(kgsr->gsr_source))) | |
524 | return -EFAULT; | |
525 | koptval = (char __user *)kgsr; | |
526 | koptlen = sizeof(struct group_source_req); | |
527 | break; | |
528 | } | |
529 | case MCAST_MSFILTER: | |
530 | { | |
46d84110 | 531 | struct compat_group_filter __user *gf32 = (void __user *)optval; |
be666e0a | 532 | struct group_filter __user *kgf; |
dae50295 DS |
533 | u32 interface, fmode, numsrc; |
534 | ||
96d4f267 | 535 | if (!access_ok(gf32, __COMPAT_GF0_SIZE) || |
dae50295 DS |
536 | __get_user(interface, &gf32->gf_interface) || |
537 | __get_user(fmode, &gf32->gf_fmode) || | |
538 | __get_user(numsrc, &gf32->gf_numsrc)) | |
539 | return -EFAULT; | |
540 | koptlen = optlen + sizeof(struct group_filter) - | |
541 | sizeof(struct compat_group_filter); | |
542 | if (koptlen < GROUP_FILTER_SIZE(numsrc)) | |
543 | return -EINVAL; | |
544 | kgf = compat_alloc_user_space(koptlen); | |
96d4f267 | 545 | if (!access_ok(kgf, koptlen) || |
dae50295 DS |
546 | __put_user(interface, &kgf->gf_interface) || |
547 | __put_user(fmode, &kgf->gf_fmode) || | |
548 | __put_user(numsrc, &kgf->gf_numsrc) || | |
549 | copy_in_user(&kgf->gf_group, &gf32->gf_group, | |
550 | sizeof(kgf->gf_group)) || | |
be666e0a | 551 | (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist, |
dae50295 DS |
552 | numsrc * sizeof(kgf->gf_slist[0])))) |
553 | return -EFAULT; | |
554 | koptval = (char __user *)kgf; | |
555 | break; | |
556 | } | |
557 | ||
558 | default: | |
559 | break; | |
560 | } | |
561 | return setsockopt(sock, level, optname, koptval, koptlen); | |
562 | } | |
dae50295 DS |
563 | EXPORT_SYMBOL(compat_mc_setsockopt); |
564 | ||
42908c69 DS |
565 | int compat_mc_getsockopt(struct sock *sock, int level, int optname, |
566 | char __user *optval, int __user *optlen, | |
c6d409cf | 567 | int (*getsockopt)(struct sock *, int, int, char __user *, int __user *)) |
42908c69 | 568 | { |
46d84110 | 569 | struct compat_group_filter __user *gf32 = (void __user *)optval; |
42908c69 DS |
570 | struct group_filter __user *kgf; |
571 | int __user *koptlen; | |
572 | u32 interface, fmode, numsrc; | |
573 | int klen, ulen, err; | |
574 | ||
575 | if (optname != MCAST_MSFILTER) | |
576 | return getsockopt(sock, level, optname, optval, optlen); | |
577 | ||
578 | koptlen = compat_alloc_user_space(sizeof(*koptlen)); | |
96d4f267 | 579 | if (!access_ok(optlen, sizeof(*optlen)) || |
42908c69 DS |
580 | __get_user(ulen, optlen)) |
581 | return -EFAULT; | |
582 | ||
583 | /* adjust len for pad */ | |
584 | klen = ulen + sizeof(*kgf) - sizeof(*gf32); | |
585 | ||
586 | if (klen < GROUP_FILTER_SIZE(0)) | |
587 | return -EINVAL; | |
588 | ||
96d4f267 | 589 | if (!access_ok(koptlen, sizeof(*koptlen)) || |
42908c69 DS |
590 | __put_user(klen, koptlen)) |
591 | return -EFAULT; | |
592 | ||
593 | /* have to allow space for previous compat_alloc_user_space, too */ | |
594 | kgf = compat_alloc_user_space(klen+sizeof(*optlen)); | |
595 | ||
96d4f267 | 596 | if (!access_ok(gf32, __COMPAT_GF0_SIZE) || |
42908c69 DS |
597 | __get_user(interface, &gf32->gf_interface) || |
598 | __get_user(fmode, &gf32->gf_fmode) || | |
599 | __get_user(numsrc, &gf32->gf_numsrc) || | |
600 | __put_user(interface, &kgf->gf_interface) || | |
601 | __put_user(fmode, &kgf->gf_fmode) || | |
602 | __put_user(numsrc, &kgf->gf_numsrc) || | |
c6d409cf | 603 | copy_in_user(&kgf->gf_group, &gf32->gf_group, sizeof(kgf->gf_group))) |
42908c69 DS |
604 | return -EFAULT; |
605 | ||
606 | err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen); | |
607 | if (err) | |
608 | return err; | |
609 | ||
96d4f267 | 610 | if (!access_ok(koptlen, sizeof(*koptlen)) || |
42908c69 DS |
611 | __get_user(klen, koptlen)) |
612 | return -EFAULT; | |
613 | ||
614 | ulen = klen - (sizeof(*kgf)-sizeof(*gf32)); | |
615 | ||
96d4f267 | 616 | if (!access_ok(optlen, sizeof(*optlen)) || |
42908c69 DS |
617 | __put_user(ulen, optlen)) |
618 | return -EFAULT; | |
619 | ||
96d4f267 LT |
620 | if (!access_ok(kgf, klen) || |
621 | !access_ok(gf32, ulen) || | |
42908c69 DS |
622 | __get_user(interface, &kgf->gf_interface) || |
623 | __get_user(fmode, &kgf->gf_fmode) || | |
624 | __get_user(numsrc, &kgf->gf_numsrc) || | |
625 | __put_user(interface, &gf32->gf_interface) || | |
626 | __put_user(fmode, &gf32->gf_fmode) || | |
627 | __put_user(numsrc, &gf32->gf_numsrc)) | |
628 | return -EFAULT; | |
629 | if (numsrc) { | |
630 | int copylen; | |
631 | ||
632 | klen -= GROUP_FILTER_SIZE(0); | |
633 | copylen = numsrc * sizeof(gf32->gf_slist[0]); | |
634 | if (copylen > klen) | |
635 | copylen = klen; | |
c6d409cf | 636 | if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen)) |
42908c69 DS |
637 | return -EFAULT; |
638 | } | |
639 | return err; | |
640 | } | |
42908c69 DS |
641 | EXPORT_SYMBOL(compat_mc_getsockopt); |
642 | ||
dae50295 | 643 | |
1da177e4 LT |
644 | /* Argument list sizes for compat_sys_socketcall */ |
645 | #define AL(x) ((x) * sizeof(u32)) | |
228e548e | 646 | static unsigned char nas[21] = { |
c6d409cf ED |
647 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
648 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), | |
649 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), | |
228e548e | 650 | AL(4), AL(5), AL(4) |
c6d409cf | 651 | }; |
1da177e4 LT |
652 | #undef AL |
653 | ||
6df35465 DB |
654 | static inline long __compat_sys_sendmsg(int fd, |
655 | struct compat_msghdr __user *msg, | |
656 | unsigned int flags) | |
1da177e4 | 657 | { |
e1834a32 DB |
658 | return __sys_sendmsg(fd, (struct user_msghdr __user *)msg, |
659 | flags | MSG_CMSG_COMPAT, false); | |
1da177e4 LT |
660 | } |
661 | ||
6df35465 DB |
662 | COMPAT_SYSCALL_DEFINE3(sendmsg, int, fd, struct compat_msghdr __user *, msg, |
663 | unsigned int, flags) | |
664 | { | |
665 | return __compat_sys_sendmsg(fd, msg, flags); | |
666 | } | |
667 | ||
668 | static inline long __compat_sys_sendmmsg(int fd, | |
669 | struct compat_mmsghdr __user *mmsg, | |
670 | unsigned int vlen, unsigned int flags) | |
228e548e AB |
671 | { |
672 | return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, | |
e1834a32 | 673 | flags | MSG_CMSG_COMPAT, false); |
228e548e AB |
674 | } |
675 | ||
6df35465 DB |
676 | COMPAT_SYSCALL_DEFINE4(sendmmsg, int, fd, struct compat_mmsghdr __user *, mmsg, |
677 | unsigned int, vlen, unsigned int, flags) | |
678 | { | |
679 | return __compat_sys_sendmmsg(fd, mmsg, vlen, flags); | |
680 | } | |
681 | ||
682 | static inline long __compat_sys_recvmsg(int fd, | |
683 | struct compat_msghdr __user *msg, | |
684 | unsigned int flags) | |
1da177e4 | 685 | { |
e1834a32 DB |
686 | return __sys_recvmsg(fd, (struct user_msghdr __user *)msg, |
687 | flags | MSG_CMSG_COMPAT, false); | |
1da177e4 LT |
688 | } |
689 | ||
6df35465 DB |
690 | COMPAT_SYSCALL_DEFINE3(recvmsg, int, fd, struct compat_msghdr __user *, msg, |
691 | unsigned int, flags) | |
692 | { | |
693 | return __compat_sys_recvmsg(fd, msg, flags); | |
694 | } | |
695 | ||
fd4e82f5 DB |
696 | static inline long __compat_sys_recvfrom(int fd, void __user *buf, |
697 | compat_size_t len, unsigned int flags, | |
698 | struct sockaddr __user *addr, | |
699 | int __user *addrlen) | |
700 | { | |
701 | return __sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, | |
702 | addrlen); | |
703 | } | |
704 | ||
3a49a0f7 | 705 | COMPAT_SYSCALL_DEFINE4(recv, int, fd, void __user *, buf, compat_size_t, len, unsigned int, flags) |
1dacc76d | 706 | { |
fd4e82f5 | 707 | return __compat_sys_recvfrom(fd, buf, len, flags, NULL, NULL); |
1dacc76d JB |
708 | } |
709 | ||
3a49a0f7 HC |
710 | COMPAT_SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, buf, compat_size_t, len, |
711 | unsigned int, flags, struct sockaddr __user *, addr, | |
712 | int __user *, addrlen) | |
1dacc76d | 713 | { |
fd4e82f5 | 714 | return __compat_sys_recvfrom(fd, buf, len, flags, addr, addrlen); |
1dacc76d JB |
715 | } |
716 | ||
e11d4284 AB |
717 | COMPAT_SYSCALL_DEFINE5(recvmmsg_time64, int, fd, struct compat_mmsghdr __user *, mmsg, |
718 | unsigned int, vlen, unsigned int, flags, | |
719 | struct __kernel_timespec __user *, timeout) | |
a2e27255 | 720 | { |
e11d4284 AB |
721 | return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, |
722 | flags | MSG_CMSG_COMPAT, timeout, NULL); | |
a2e27255 ACM |
723 | } |
724 | ||
e11d4284 | 725 | #ifdef CONFIG_COMPAT_32BIT_TIME |
8dabe724 | 726 | COMPAT_SYSCALL_DEFINE5(recvmmsg_time32, int, fd, struct compat_mmsghdr __user *, mmsg, |
157b334a | 727 | unsigned int, vlen, unsigned int, flags, |
9afc5eee | 728 | struct old_timespec32 __user *, timeout) |
157b334a | 729 | { |
e11d4284 AB |
730 | return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, |
731 | flags | MSG_CMSG_COMPAT, NULL, timeout); | |
157b334a | 732 | } |
e11d4284 | 733 | #endif |
157b334a | 734 | |
361d93c4 | 735 | COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user *, args) |
1da177e4 | 736 | { |
62bc306e RGB |
737 | u32 a[AUDITSC_ARGS]; |
738 | unsigned int len; | |
1da177e4 | 739 | u32 a0, a1; |
62bc306e | 740 | int ret; |
4768fbcb | 741 | |
228e548e | 742 | if (call < SYS_SOCKET || call > SYS_SENDMMSG) |
1da177e4 | 743 | return -EINVAL; |
62bc306e RGB |
744 | len = nas[call]; |
745 | if (len > sizeof(a)) | |
746 | return -EINVAL; | |
747 | ||
748 | if (copy_from_user(a, args, len)) | |
1da177e4 | 749 | return -EFAULT; |
62bc306e RGB |
750 | |
751 | ret = audit_socketcall_compat(len / sizeof(a[0]), a); | |
752 | if (ret) | |
753 | return ret; | |
754 | ||
1da177e4 LT |
755 | a0 = a[0]; |
756 | a1 = a[1]; | |
4768fbcb | 757 | |
e71a4783 | 758 | switch (call) { |
1da177e4 | 759 | case SYS_SOCKET: |
9d6a15c3 | 760 | ret = __sys_socket(a0, a1, a[2]); |
1da177e4 LT |
761 | break; |
762 | case SYS_BIND: | |
a87d35d8 | 763 | ret = __sys_bind(a0, compat_ptr(a1), a[2]); |
1da177e4 LT |
764 | break; |
765 | case SYS_CONNECT: | |
1387c2c2 | 766 | ret = __sys_connect(a0, compat_ptr(a1), a[2]); |
1da177e4 LT |
767 | break; |
768 | case SYS_LISTEN: | |
25e290ee | 769 | ret = __sys_listen(a0, a1); |
1da177e4 LT |
770 | break; |
771 | case SYS_ACCEPT: | |
4541e805 | 772 | ret = __sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0); |
1da177e4 LT |
773 | break; |
774 | case SYS_GETSOCKNAME: | |
8882a107 | 775 | ret = __sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2])); |
1da177e4 LT |
776 | break; |
777 | case SYS_GETPEERNAME: | |
b21c8f83 | 778 | ret = __sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2])); |
1da177e4 LT |
779 | break; |
780 | case SYS_SOCKETPAIR: | |
6debc8d8 | 781 | ret = __sys_socketpair(a0, a1, a[2], compat_ptr(a[3])); |
1da177e4 LT |
782 | break; |
783 | case SYS_SEND: | |
f3bf896b | 784 | ret = __sys_sendto(a0, compat_ptr(a1), a[2], a[3], NULL, 0); |
1da177e4 LT |
785 | break; |
786 | case SYS_SENDTO: | |
211b634b DB |
787 | ret = __sys_sendto(a0, compat_ptr(a1), a[2], a[3], |
788 | compat_ptr(a[4]), a[5]); | |
1da177e4 LT |
789 | break; |
790 | case SYS_RECV: | |
fd4e82f5 DB |
791 | ret = __compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], |
792 | NULL, NULL); | |
1da177e4 LT |
793 | break; |
794 | case SYS_RECVFROM: | |
fd4e82f5 DB |
795 | ret = __compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], |
796 | compat_ptr(a[4]), | |
797 | compat_ptr(a[5])); | |
1da177e4 LT |
798 | break; |
799 | case SYS_SHUTDOWN: | |
005a1aea | 800 | ret = __sys_shutdown(a0, a1); |
1da177e4 LT |
801 | break; |
802 | case SYS_SETSOCKOPT: | |
73ee3eaf DB |
803 | ret = __compat_sys_setsockopt(a0, a1, a[2], |
804 | compat_ptr(a[3]), a[4]); | |
1da177e4 LT |
805 | break; |
806 | case SYS_GETSOCKOPT: | |
8770cf4a DB |
807 | ret = __compat_sys_getsockopt(a0, a1, a[2], |
808 | compat_ptr(a[3]), | |
809 | compat_ptr(a[4])); | |
1da177e4 LT |
810 | break; |
811 | case SYS_SENDMSG: | |
6df35465 | 812 | ret = __compat_sys_sendmsg(a0, compat_ptr(a1), a[2]); |
1da177e4 | 813 | break; |
228e548e | 814 | case SYS_SENDMMSG: |
6df35465 | 815 | ret = __compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]); |
228e548e | 816 | break; |
1da177e4 | 817 | case SYS_RECVMSG: |
6df35465 | 818 | ret = __compat_sys_recvmsg(a0, compat_ptr(a1), a[2]); |
1da177e4 | 819 | break; |
a2e27255 | 820 | case SYS_RECVMMSG: |
e11d4284 AB |
821 | ret = __sys_recvmmsg(a0, compat_ptr(a1), a[2], |
822 | a[3] | MSG_CMSG_COMPAT, NULL, | |
823 | compat_ptr(a[4])); | |
a2e27255 | 824 | break; |
de11defe | 825 | case SYS_ACCEPT4: |
4541e805 | 826 | ret = __sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]); |
aaca0bdc | 827 | break; |
1da177e4 LT |
828 | default: |
829 | ret = -EINVAL; | |
830 | break; | |
831 | } | |
832 | return ret; | |
833 | } |