blob: 161b7bea1f6204ff9120a0c2347f6105c8975772 [file] [log] [blame]
Thomas Gleixner457c8992019-05-19 13:08:55 +01001// SPDX-License-Identifier: GPL-2.0-only
YOSHIFUJI Hideaki4768fbc2007-02-09 23:25:31 +09002/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 * 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>
YOSHIFUJI Hideaki4768fbc2007-02-09 23:25:31 +090012 * Copyright (C) 2000,2001 Andi Kleen, SuSE Labs
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 */
14
15#include <linux/kernel.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090016#include <linux/gfp.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <linux/fs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <linux/security.h>
Richard Guy Briggs62bc3062017-01-17 11:07:15 -050026#include <linux/audit.h>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040027#include <linux/export.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028
29#include <net/scm.h>
30#include <net/sock.h>
David L Stevensdae50292008-04-27 01:06:07 -070031#include <net/ip.h>
32#include <net/ipv6.h>
Linus Torvalds7c0f6ba2016-12-24 11:46:01 -080033#include <linux/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include <net/compat.h>
35
Jens Axboe0a384ab2020-02-27 08:11:20 -070036int __get_compat_msghdr(struct msghdr *kmsg,
Dylan Yudaken72c531f2022-07-14 04:02:57 -070037 struct compat_msghdr *msg,
38 struct sockaddr __user **save_addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -070039{
Al Viro08adb7d2014-11-10 20:23:13 -050040 ssize_t err;
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
Dylan Yudaken72c531f2022-07-14 04:02:57 -070042 kmsg->msg_flags = msg->msg_flags;
43 kmsg->msg_namelen = msg->msg_namelen;
Catalin Marinas91edd092015-03-20 16:48:13 +000044
Dylan Yudaken72c531f2022-07-14 04:02:57 -070045 if (!msg->msg_name)
Catalin Marinas91edd092015-03-20 16:48:13 +000046 kmsg->msg_namelen = 0;
47
48 if (kmsg->msg_namelen < 0)
49 return -EINVAL;
50
Dan Carpenter1661bf32013-10-03 00:27:20 +030051 if (kmsg->msg_namelen > sizeof(struct sockaddr_storage))
Dan Carpenterdb31c552013-11-27 15:40:21 +030052 kmsg->msg_namelen = sizeof(struct sockaddr_storage);
Al Viro5da028a2017-06-27 18:24:21 -040053
Christoph Hellwig1f466e12020-05-11 13:59:13 +020054 kmsg->msg_control_is_user = true;
Tetsuo Handad547c1b2022-09-14 18:51:54 +090055 kmsg->msg_get_inq = 0;
Dylan Yudaken72c531f2022-07-14 04:02:57 -070056 kmsg->msg_control_user = compat_ptr(msg->msg_control);
57 kmsg->msg_controllen = msg->msg_controllen;
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
Al Viro08adb7d2014-11-10 20:23:13 -050059 if (save_addr)
Dylan Yudaken72c531f2022-07-14 04:02:57 -070060 *save_addr = compat_ptr(msg->msg_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -070061
Dylan Yudaken72c531f2022-07-14 04:02:57 -070062 if (msg->msg_name && kmsg->msg_namelen) {
Al Viro08adb7d2014-11-10 20:23:13 -050063 if (!save_addr) {
Dylan Yudaken72c531f2022-07-14 04:02:57 -070064 err = move_addr_to_kernel(compat_ptr(msg->msg_name),
Al Viro08adb7d2014-11-10 20:23:13 -050065 kmsg->msg_namelen,
66 kmsg->msg_name);
Stephen Hemmingere71a4782007-04-10 20:10:33 -070067 if (err < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 return err;
69 }
Andrey Ryabinin40eea802014-07-26 21:26:58 +040070 } else {
Al Viro08adb7d2014-11-10 20:23:13 -050071 kmsg->msg_name = NULL;
72 kmsg->msg_namelen = 0;
Andrey Ryabinin40eea802014-07-26 21:26:58 +040073 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070074
Dylan Yudaken72c531f2022-07-14 04:02:57 -070075 if (msg->msg_iovlen > UIO_MAXIOV)
Al Viro08449322014-11-09 22:33:45 -050076 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -070077
tadeusz.struk@intel.com0345f932015-03-19 12:31:25 -070078 kmsg->msg_iocb = NULL;
Pavel Begunkov7c701d92022-07-12 21:52:29 +010079 kmsg->msg_ubuf = NULL;
Jens Axboe0a384ab2020-02-27 08:11:20 -070080 return 0;
81}
tadeusz.struk@intel.com0345f932015-03-19 12:31:25 -070082
Jens Axboe0a384ab2020-02-27 08:11:20 -070083int get_compat_msghdr(struct msghdr *kmsg,
84 struct compat_msghdr __user *umsg,
85 struct sockaddr __user **save_addr,
86 struct iovec **iov)
87{
Dylan Yudaken72c531f2022-07-14 04:02:57 -070088 struct compat_msghdr msg;
Jens Axboe0a384ab2020-02-27 08:11:20 -070089 ssize_t err;
90
Dylan Yudaken72c531f2022-07-14 04:02:57 -070091 if (copy_from_user(&msg, umsg, sizeof(*umsg)))
92 return -EFAULT;
93
Jens Axboe4f6a94d2022-07-15 15:54:47 -060094 err = __get_compat_msghdr(kmsg, &msg, save_addr);
Jens Axboe0a384ab2020-02-27 08:11:20 -070095 if (err)
96 return err;
97
Al Virode4eda92022-09-15 20:25:47 -040098 err = import_iovec(save_addr ? ITER_DEST : ITER_SOURCE,
99 compat_ptr(msg.msg_iov), msg.msg_iovlen,
Christoph Hellwig89cd35c2020-09-25 06:51:41 +0200100 UIO_FASTIOV, iov, &kmsg->msg_iter);
Jens Axboe87e5e6d2019-05-14 16:02:22 -0600101 return err < 0 ? err : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102}
103
104/* Bleech... */
105#define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32))
106
107#define CMSG_COMPAT_DATA(cmsg) \
yuan linyu1ff8ceb2017-01-03 20:42:17 +0800108 ((void __user *)((char __user *)(cmsg) + sizeof(struct compat_cmsghdr)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109#define CMSG_COMPAT_SPACE(len) \
yuan linyu1ff8ceb2017-01-03 20:42:17 +0800110 (sizeof(struct compat_cmsghdr) + CMSG_COMPAT_ALIGN(len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111#define CMSG_COMPAT_LEN(len) \
yuan linyu1ff8ceb2017-01-03 20:42:17 +0800112 (sizeof(struct compat_cmsghdr) + (len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113
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 - \
Christoph Hellwig1f466e12020-05-11 13:59:13 +0200123 ((char __user *)(ucmsg) - (char __user *)(mhdr)->msg_control_user)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124
125static 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 */
Al Viro8920e8f2005-09-07 18:28:51 -0700139int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 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;
Al Viro8920e8f2005-09-07 18:28:51 -0700146 int err = -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147
David S. Millerac4340f2017-01-04 13:24:19 -0500148 BUILD_BUG_ON(sizeof(struct compat_cmsghdr) !=
149 CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)));
150
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 kcmlen = 0;
152 kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf;
153 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
Stephen Hemmingere71a4782007-04-10 20:10:33 -0700154 while (ucmsg != NULL) {
155 if (get_user(ucmlen, &ucmsg->cmsg_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 return -EFAULT;
157
158 /* Catch bogons. */
159 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
160 return -EINVAL;
161
yuan linyu1ff8ceb2017-01-03 20:42:17 +0800162 tmp = ((ucmlen - sizeof(*ucmsg)) + sizeof(struct cmsghdr));
Al Viro8920e8f2005-09-07 18:28:51 -0700163 tmp = CMSG_ALIGN(tmp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 kcmlen += tmp;
165 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
166 }
Stephen Hemmingere71a4782007-04-10 20:10:33 -0700167 if (kcmlen == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 return -EINVAL;
169
170 /* The kcmlen holds the 64-bit version of the control length.
171 * It may not be modified as we do not stick it into the kmsg
172 * until we have successfully copied over all of the data
173 * from the user.
174 */
Al Viro8920e8f2005-09-07 18:28:51 -0700175 if (kcmlen > stackbuf_size)
176 kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL);
177 if (kcmsg == NULL)
Zheng Yongjun49251cd2021-06-02 22:06:40 +0800178 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179
180 /* Now copy them over neatly. */
181 memset(kcmsg, 0, kcmlen);
182 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
Stephen Hemmingere71a4782007-04-10 20:10:33 -0700183 while (ucmsg != NULL) {
Al Viro547ce4c2020-05-31 02:06:55 +0100184 struct compat_cmsghdr cmsg;
185 if (copy_from_user(&cmsg, ucmsg, sizeof(cmsg)))
Al Viro8920e8f2005-09-07 18:28:51 -0700186 goto Efault;
Al Viro547ce4c2020-05-31 02:06:55 +0100187 if (!CMSG_COMPAT_OK(cmsg.cmsg_len, ucmsg, kmsg))
Al Viro8920e8f2005-09-07 18:28:51 -0700188 goto Einval;
Al Viro547ce4c2020-05-31 02:06:55 +0100189 tmp = ((cmsg.cmsg_len - sizeof(*ucmsg)) + sizeof(struct cmsghdr));
Al Viro8920e8f2005-09-07 18:28:51 -0700190 if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp))
191 goto Einval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 kcmsg->cmsg_len = tmp;
Al Viro547ce4c2020-05-31 02:06:55 +0100193 kcmsg->cmsg_level = cmsg.cmsg_level;
194 kcmsg->cmsg_type = cmsg.cmsg_type;
Al Viro8920e8f2005-09-07 18:28:51 -0700195 tmp = CMSG_ALIGN(tmp);
Al Viro547ce4c2020-05-31 02:06:55 +0100196 if (copy_from_user(CMSG_DATA(kcmsg),
Al Viro8920e8f2005-09-07 18:28:51 -0700197 CMSG_COMPAT_DATA(ucmsg),
Al Viro547ce4c2020-05-31 02:06:55 +0100198 (cmsg.cmsg_len - sizeof(*ucmsg))))
Al Viro8920e8f2005-09-07 18:28:51 -0700199 goto Efault;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200
201 /* Advance. */
Al Viro8920e8f2005-09-07 18:28:51 -0700202 kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp);
Al Viro181964e2020-07-27 19:22:20 +0100203 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, cmsg.cmsg_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 }
205
Meng Xuc2a64bb2017-09-19 13:19:13 -0400206 /*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 /* 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
Al Viro8920e8f2005-09-07 18:28:51 -0700218Einval:
219 err = -EINVAL;
220Efault:
221 if (kcmsg_base != (struct cmsghdr *)stackbuf)
222 sock_kfree_s(sk, kcmsg_base, kcmlen);
223 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224}
225
226int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data)
227{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
229 struct compat_cmsghdr cmhdr;
Deepa Dinamani13c6ee22019-02-02 07:34:48 -0800230 struct old_timeval32 ctv;
231 struct old_timespec32 cts[3];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 int cmlen;
233
Stephen Hemmingere71a4782007-04-10 20:10:33 -0700234 if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 kmsg->msg_flags |= MSG_CTRUNC;
236 return 0; /* XXX: return error? check spec. */
237 }
238
H. J. Luee4fa232012-02-19 17:50:46 -0800239 if (!COMPAT_USE_64BIT_TIME) {
Deepa Dinamani7f1bc6e2019-02-02 07:34:46 -0800240 if (level == SOL_SOCKET && type == SO_TIMESTAMP_OLD) {
Deepa Dinamani13c6ee22019-02-02 07:34:48 -0800241 struct __kernel_old_timeval *tv = (struct __kernel_old_timeval *)data;
H. J. Luee4fa232012-02-19 17:50:46 -0800242 ctv.tv_sec = tv->tv_sec;
243 ctv.tv_usec = tv->tv_usec;
244 data = &ctv;
245 len = sizeof(ctv);
Patrick Ohly20d49472009-02-12 05:03:38 +0000246 }
H. J. Luee4fa232012-02-19 17:50:46 -0800247 if (level == SOL_SOCKET &&
Deepa Dinamani7f1bc6e2019-02-02 07:34:46 -0800248 (type == SO_TIMESTAMPNS_OLD || type == SO_TIMESTAMPING_OLD)) {
249 int count = type == SO_TIMESTAMPNS_OLD ? 1 : 3;
H. J. Luee4fa232012-02-19 17:50:46 -0800250 int i;
Arnd Bergmanndf1b4ba2019-10-25 22:04:46 +0200251 struct __kernel_old_timespec *ts = data;
H. J. Luee4fa232012-02-19 17:50:46 -0800252 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;
258 }
YOSHIFUJI Hideaki4768fbc2007-02-09 23:25:31 +0900259 }
260
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 cmlen = CMSG_COMPAT_LEN(len);
Stephen Hemmingere71a4782007-04-10 20:10:33 -0700262 if (kmsg->msg_controllen < cmlen) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 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
Stephen Hemmingere71a4782007-04-10 20:10:33 -0700270 if (copy_to_user(cm, &cmhdr, sizeof cmhdr))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 return -EFAULT;
Stephen Hemmingere71a4782007-04-10 20:10:33 -0700272 if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 return -EFAULT;
274 cmlen = CMSG_COMPAT_SPACE(len);
Wei Yongjun1ac70e72007-12-20 14:36:44 -0800275 if (kmsg->msg_controllen < cmlen)
276 cmlen = kmsg->msg_controllen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 kmsg->msg_control += cmlen;
278 kmsg->msg_controllen -= cmlen;
279 return 0;
280}
281
Kees Cookc0029de2020-06-09 16:11:29 -0700282static int scm_max_fds_compat(struct msghdr *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283{
Kees Cookc0029de2020-06-09 16:11:29 -0700284 if (msg->msg_controllen <= sizeof(struct compat_cmsghdr))
285 return 0;
286 return (msg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int);
287}
288
289void scm_detach_fds_compat(struct msghdr *msg, struct scm_cookie *scm)
290{
291 struct compat_cmsghdr __user *cm =
292 (struct compat_cmsghdr __user *)msg->msg_control;
293 unsigned int o_flags = (msg->msg_flags & MSG_CMSG_CLOEXEC) ? O_CLOEXEC : 0;
294 int fdmax = min_t(int, scm_max_fds_compat(msg), scm->fp->count);
Kees Cook16b89f62020-08-07 10:53:54 -0700295 int __user *cmsg_data = CMSG_COMPAT_DATA(cm);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 int err = 0, i;
297
Kees Cookc0029de2020-06-09 16:11:29 -0700298 for (i = 0; i < fdmax; i++) {
Kees Cook66590612020-06-10 08:20:05 -0700299 err = receive_fd_user(scm->fp->fp[i], cmsg_data + i, o_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 if (err < 0)
301 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 }
303
304 if (i > 0) {
305 int cmlen = CMSG_COMPAT_LEN(i * sizeof(int));
Kees Cookc0029de2020-06-09 16:11:29 -0700306
Miklos Szeredieffee6a2006-10-09 21:42:14 -0700307 err = put_user(SOL_SOCKET, &cm->cmsg_level);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 if (!err)
309 err = put_user(SCM_RIGHTS, &cm->cmsg_type);
310 if (!err)
311 err = put_user(cmlen, &cm->cmsg_len);
312 if (!err) {
313 cmlen = CMSG_COMPAT_SPACE(i * sizeof(int));
Kees Cookc0029de2020-06-09 16:11:29 -0700314 if (msg->msg_controllen < cmlen)
315 cmlen = msg->msg_controllen;
316 msg->msg_control += cmlen;
317 msg->msg_controllen -= cmlen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 }
319 }
Kees Cookc0029de2020-06-09 16:11:29 -0700320
321 if (i < scm->fp->count || (scm->fp->count && fdmax <= 0))
322 msg->msg_flags |= MSG_CTRUNC;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323
324 /*
Kees Cookc0029de2020-06-09 16:11:29 -0700325 * All of the files that fit in the message have had their usage counts
326 * incremented, so we just free the list.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 */
328 __scm_destroy(scm);
329}
330
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331/* Argument list sizes for compat_sys_socketcall */
332#define AL(x) ((x) * sizeof(u32))
Anton Blanchard228e5482011-05-02 20:21:35 +0000333static unsigned char nas[21] = {
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700334 AL(0), AL(3), AL(3), AL(3), AL(2), AL(3),
335 AL(3), AL(3), AL(4), AL(4), AL(4), AL(6),
336 AL(6), AL(2), AL(5), AL(5), AL(3), AL(3),
Anton Blanchard228e5482011-05-02 20:21:35 +0000337 AL(4), AL(5), AL(4)
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700338};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339#undef AL
340
Dominik Brodowski6df35462018-03-16 17:07:03 +0100341static inline long __compat_sys_sendmsg(int fd,
342 struct compat_msghdr __user *msg,
343 unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344{
Dominik Brodowskie1834a32018-03-13 20:35:57 +0100345 return __sys_sendmsg(fd, (struct user_msghdr __user *)msg,
346 flags | MSG_CMSG_COMPAT, false);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347}
348
Dominik Brodowski6df35462018-03-16 17:07:03 +0100349COMPAT_SYSCALL_DEFINE3(sendmsg, int, fd, struct compat_msghdr __user *, msg,
350 unsigned int, flags)
351{
352 return __compat_sys_sendmsg(fd, msg, flags);
353}
354
355static inline long __compat_sys_sendmmsg(int fd,
356 struct compat_mmsghdr __user *mmsg,
357 unsigned int vlen, unsigned int flags)
Anton Blanchard228e5482011-05-02 20:21:35 +0000358{
359 return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
Dominik Brodowskie1834a32018-03-13 20:35:57 +0100360 flags | MSG_CMSG_COMPAT, false);
Anton Blanchard228e5482011-05-02 20:21:35 +0000361}
362
Dominik Brodowski6df35462018-03-16 17:07:03 +0100363COMPAT_SYSCALL_DEFINE4(sendmmsg, int, fd, struct compat_mmsghdr __user *, mmsg,
364 unsigned int, vlen, unsigned int, flags)
365{
366 return __compat_sys_sendmmsg(fd, mmsg, vlen, flags);
367}
368
369static inline long __compat_sys_recvmsg(int fd,
370 struct compat_msghdr __user *msg,
371 unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372{
Dominik Brodowskie1834a32018-03-13 20:35:57 +0100373 return __sys_recvmsg(fd, (struct user_msghdr __user *)msg,
374 flags | MSG_CMSG_COMPAT, false);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375}
376
Dominik Brodowski6df35462018-03-16 17:07:03 +0100377COMPAT_SYSCALL_DEFINE3(recvmsg, int, fd, struct compat_msghdr __user *, msg,
378 unsigned int, flags)
379{
380 return __compat_sys_recvmsg(fd, msg, flags);
381}
382
Dominik Brodowskifd4e82f2018-03-16 16:48:34 +0100383static inline long __compat_sys_recvfrom(int fd, void __user *buf,
384 compat_size_t len, unsigned int flags,
385 struct sockaddr __user *addr,
386 int __user *addrlen)
387{
388 return __sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr,
389 addrlen);
390}
391
Heiko Carstens3a49a0f2014-03-04 17:09:57 +0100392COMPAT_SYSCALL_DEFINE4(recv, int, fd, void __user *, buf, compat_size_t, len, unsigned int, flags)
Johannes Berg1dacc762009-07-01 11:26:02 +0000393{
Dominik Brodowskifd4e82f2018-03-16 16:48:34 +0100394 return __compat_sys_recvfrom(fd, buf, len, flags, NULL, NULL);
Johannes Berg1dacc762009-07-01 11:26:02 +0000395}
396
Heiko Carstens3a49a0f2014-03-04 17:09:57 +0100397COMPAT_SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, buf, compat_size_t, len,
398 unsigned int, flags, struct sockaddr __user *, addr,
399 int __user *, addrlen)
Johannes Berg1dacc762009-07-01 11:26:02 +0000400{
Dominik Brodowskifd4e82f2018-03-16 16:48:34 +0100401 return __compat_sys_recvfrom(fd, buf, len, flags, addr, addrlen);
Johannes Berg1dacc762009-07-01 11:26:02 +0000402}
403
Arnd Bergmanne11d4282018-04-18 13:43:52 +0200404COMPAT_SYSCALL_DEFINE5(recvmmsg_time64, int, fd, struct compat_mmsghdr __user *, mmsg,
405 unsigned int, vlen, unsigned int, flags,
406 struct __kernel_timespec __user *, timeout)
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -0700407{
Arnd Bergmanne11d4282018-04-18 13:43:52 +0200408 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
409 flags | MSG_CMSG_COMPAT, timeout, NULL);
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -0700410}
411
Arnd Bergmanne11d4282018-04-18 13:43:52 +0200412#ifdef CONFIG_COMPAT_32BIT_TIME
Arnd Bergmann8dabe722019-01-07 00:33:08 +0100413COMPAT_SYSCALL_DEFINE5(recvmmsg_time32, int, fd, struct compat_mmsghdr __user *, mmsg,
Dominik Brodowski157b3342018-03-16 17:10:50 +0100414 unsigned int, vlen, unsigned int, flags,
Arnd Bergmann9afc5ee2018-07-13 12:52:28 +0200415 struct old_timespec32 __user *, timeout)
Dominik Brodowski157b3342018-03-16 17:10:50 +0100416{
Arnd Bergmanne11d4282018-04-18 13:43:52 +0200417 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
418 flags | MSG_CMSG_COMPAT, NULL, timeout);
Dominik Brodowski157b3342018-03-16 17:10:50 +0100419}
Arnd Bergmanne11d4282018-04-18 13:43:52 +0200420#endif
Dominik Brodowski157b3342018-03-16 17:10:50 +0100421
Heiko Carstens361d93c2014-03-03 16:21:27 +0100422COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user *, args)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423{
Richard Guy Briggs62bc3062017-01-17 11:07:15 -0500424 u32 a[AUDITSC_ARGS];
425 unsigned int len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426 u32 a0, a1;
Richard Guy Briggs62bc3062017-01-17 11:07:15 -0500427 int ret;
YOSHIFUJI Hideaki4768fbc2007-02-09 23:25:31 +0900428
Anton Blanchard228e5482011-05-02 20:21:35 +0000429 if (call < SYS_SOCKET || call > SYS_SENDMMSG)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 return -EINVAL;
Richard Guy Briggs62bc3062017-01-17 11:07:15 -0500431 len = nas[call];
432 if (len > sizeof(a))
433 return -EINVAL;
434
435 if (copy_from_user(a, args, len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 return -EFAULT;
Richard Guy Briggs62bc3062017-01-17 11:07:15 -0500437
438 ret = audit_socketcall_compat(len / sizeof(a[0]), a);
439 if (ret)
440 return ret;
441
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 a0 = a[0];
443 a1 = a[1];
YOSHIFUJI Hideaki4768fbc2007-02-09 23:25:31 +0900444
Stephen Hemmingere71a4782007-04-10 20:10:33 -0700445 switch (call) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 case SYS_SOCKET:
Dominik Brodowski9d6a15c2018-03-13 19:29:43 +0100447 ret = __sys_socket(a0, a1, a[2]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 break;
449 case SYS_BIND:
Dominik Brodowskia87d35d2018-03-13 19:33:09 +0100450 ret = __sys_bind(a0, compat_ptr(a1), a[2]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 break;
452 case SYS_CONNECT:
Dominik Brodowski1387c2c2018-03-13 19:35:09 +0100453 ret = __sys_connect(a0, compat_ptr(a1), a[2]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 break;
455 case SYS_LISTEN:
Dominik Brodowski25e290e2018-03-13 19:36:54 +0100456 ret = __sys_listen(a0, a1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 break;
458 case SYS_ACCEPT:
Dominik Brodowski4541e802018-03-13 19:24:23 +0100459 ret = __sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 break;
461 case SYS_GETSOCKNAME:
Dominik Brodowski8882a102018-03-13 19:43:14 +0100462 ret = __sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463 break;
464 case SYS_GETPEERNAME:
Dominik Brodowskib21c8f82018-03-13 19:47:00 +0100465 ret = __sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466 break;
467 case SYS_SOCKETPAIR:
Dominik Brodowski6debc8d2018-03-13 19:49:23 +0100468 ret = __sys_socketpair(a0, a1, a[2], compat_ptr(a[3]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 break;
470 case SYS_SEND:
Dominik Brodowskif3bf8962018-03-13 19:52:00 +0100471 ret = __sys_sendto(a0, compat_ptr(a1), a[2], a[3], NULL, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 break;
473 case SYS_SENDTO:
Dominik Brodowski211b6342018-03-13 19:18:52 +0100474 ret = __sys_sendto(a0, compat_ptr(a1), a[2], a[3],
475 compat_ptr(a[4]), a[5]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 break;
477 case SYS_RECV:
Dominik Brodowskifd4e82f2018-03-16 16:48:34 +0100478 ret = __compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3],
479 NULL, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 break;
481 case SYS_RECVFROM:
Dominik Brodowskifd4e82f2018-03-16 16:48:34 +0100482 ret = __compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3],
483 compat_ptr(a[4]),
484 compat_ptr(a[5]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 break;
486 case SYS_SHUTDOWN:
Dominik Brodowski005a1ae2018-03-13 20:07:05 +0100487 ret = __sys_shutdown(a0, a1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 break;
489 case SYS_SETSOCKOPT:
Christoph Hellwig55db9c02020-07-17 08:23:15 +0200490 ret = __sys_setsockopt(a0, a1, a[2], compat_ptr(a[3]), a[4]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 break;
492 case SYS_GETSOCKOPT:
Christoph Hellwig55db9c02020-07-17 08:23:15 +0200493 ret = __sys_getsockopt(a0, a1, a[2], compat_ptr(a[3]),
494 compat_ptr(a[4]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 break;
496 case SYS_SENDMSG:
Dominik Brodowski6df35462018-03-16 17:07:03 +0100497 ret = __compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 break;
Anton Blanchard228e5482011-05-02 20:21:35 +0000499 case SYS_SENDMMSG:
Dominik Brodowski6df35462018-03-16 17:07:03 +0100500 ret = __compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]);
Anton Blanchard228e5482011-05-02 20:21:35 +0000501 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 case SYS_RECVMSG:
Dominik Brodowski6df35462018-03-16 17:07:03 +0100503 ret = __compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 break;
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -0700505 case SYS_RECVMMSG:
Arnd Bergmanne11d4282018-04-18 13:43:52 +0200506 ret = __sys_recvmmsg(a0, compat_ptr(a1), a[2],
507 a[3] | MSG_CMSG_COMPAT, NULL,
508 compat_ptr(a[4]));
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -0700509 break;
Ulrich Drepperde11def2008-11-19 15:36:14 -0800510 case SYS_ACCEPT4:
Dominik Brodowski4541e802018-03-13 19:24:23 +0100511 ret = __sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]);
Ulrich Drepperaaca0bd2008-07-23 21:29:20 -0700512 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 default:
514 ret = -EINVAL;
515 break;
516 }
517 return ret;
518}