YOSHIFUJI Hideaki | 4768fbc | 2007-02-09 23:25:31 +0900 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
YOSHIFUJI Hideaki | 4768fbc | 2007-02-09 23:25:31 +0900 | [diff] [blame] | 11 | * Copyright (C) 2000,2001 Andi Kleen, SuSE Labs |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | */ |
| 13 | |
| 14 | #include <linux/kernel.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 15 | #include <linux/gfp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <linux/fs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <linux/security.h> |
Paul Gortmaker | bc3b2d7 | 2011-07-15 11:47:34 -0400 | [diff] [blame] | 25 | #include <linux/export.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | |
| 27 | #include <net/scm.h> |
| 28 | #include <net/sock.h> |
David L Stevens | dae5029 | 2008-04-27 01:06:07 -0700 | [diff] [blame] | 29 | #include <net/ip.h> |
| 30 | #include <net/ipv6.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 40 | while (niov > 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | compat_uptr_t buf; |
| 42 | compat_size_t len; |
| 43 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 44 | if (get_user(len, &uiov32->iov_len) || |
David S. Miller | 8acfe46 | 2010-10-28 11:41:55 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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, |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 82 | struct sockaddr *kern_address, int mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | { |
| 84 | int tot_len; |
| 85 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 86 | if (kern_msg->msg_namelen) { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 87 | if (mode == VERIFY_READ) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | int err = move_addr_to_kernel(kern_msg->msg_name, |
| 89 | kern_msg->msg_namelen, |
| 90 | kern_address); |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 91 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | return err; |
| 93 | } |
| 94 | kern_msg->msg_name = kern_address; |
| 95 | } else |
| 96 | kern_msg->msg_name = NULL; |
| 97 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 101 | if (tot_len >= 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | kern_msg->msg_iov = kern_iov; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
Al Viro | 8920e8f | 2005-09-07 18:28:51 -0700 | [diff] [blame] | 142 | int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Al Viro | 8920e8f | 2005-09-07 18:28:51 -0700 | [diff] [blame] | 149 | int err = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | |
| 151 | kcmlen = 0; |
| 152 | kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf; |
| 153 | ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 154 | while (ucmsg != NULL) { |
| 155 | if (get_user(ucmlen, &ucmsg->cmsg_len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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))); |
Al Viro | 8920e8f | 2005-09-07 18:28:51 -0700 | [diff] [blame] | 164 | tmp = CMSG_ALIGN(tmp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | kcmlen += tmp; |
| 166 | ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); |
| 167 | } |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 168 | if (kcmlen == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
Al Viro | 8920e8f | 2005-09-07 18:28:51 -0700 | [diff] [blame] | 176 | if (kcmlen > stackbuf_size) |
| 177 | kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL); |
| 178 | if (kcmsg == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | return -ENOBUFS; |
| 180 | |
| 181 | /* Now copy them over neatly. */ |
| 182 | memset(kcmsg, 0, kcmlen); |
| 183 | ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 184 | while (ucmsg != NULL) { |
Al Viro | 8920e8f | 2005-09-07 18:28:51 -0700 | [diff] [blame] | 185 | if (__get_user(ucmlen, &ucmsg->cmsg_len)) |
| 186 | goto Efault; |
| 187 | if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) |
| 188 | goto Einval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + |
| 190 | CMSG_ALIGN(sizeof(struct cmsghdr))); |
Al Viro | 8920e8f | 2005-09-07 18:28:51 -0700 | [diff] [blame] | 191 | if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp)) |
| 192 | goto Einval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | kcmsg->cmsg_len = tmp; |
Al Viro | 8920e8f | 2005-09-07 18:28:51 -0700 | [diff] [blame] | 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; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | |
| 202 | /* Advance. */ |
Al Viro | 8920e8f | 2005-09-07 18:28:51 -0700 | [diff] [blame] | 203 | kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Al Viro | 8920e8f | 2005-09-07 18:28:51 -0700 | [diff] [blame] | 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; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | } |
| 219 | |
| 220 | int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data) |
| 221 | { |
| 222 | struct compat_timeval ctv; |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 223 | struct compat_timespec cts[3]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; |
| 225 | struct compat_cmsghdr cmhdr; |
| 226 | int cmlen; |
| 227 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 228 | if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | kmsg->msg_flags |= MSG_CTRUNC; |
| 230 | return 0; /* XXX: return error? check spec. */ |
| 231 | } |
| 232 | |
Patrick Ohly | d35aac1 | 2008-11-12 01:54:56 -0800 | [diff] [blame] | 233 | if (level == SOL_SOCKET && type == SCM_TIMESTAMP) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | struct timeval *tv = (struct timeval *)data; |
| 235 | ctv.tv_sec = tv->tv_sec; |
| 236 | ctv.tv_usec = tv->tv_usec; |
| 237 | data = &ctv; |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 238 | len = sizeof(ctv); |
| 239 | } |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 240 | if (level == SOL_SOCKET && |
| 241 | (type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) { |
| 242 | int count = type == SCM_TIMESTAMPNS ? 1 : 3; |
| 243 | int i; |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 244 | struct timespec *ts = (struct timespec *)data; |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 245 | for (i = 0; i < count; i++) { |
| 246 | cts[i].tv_sec = ts[i].tv_sec; |
| 247 | cts[i].tv_nsec = ts[i].tv_nsec; |
| 248 | } |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 249 | data = &cts; |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 250 | len = sizeof(cts[0]) * count; |
YOSHIFUJI Hideaki | 4768fbc | 2007-02-09 23:25:31 +0900 | [diff] [blame] | 251 | } |
| 252 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | cmlen = CMSG_COMPAT_LEN(len); |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 254 | if (kmsg->msg_controllen < cmlen) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | kmsg->msg_flags |= MSG_CTRUNC; |
| 256 | cmlen = kmsg->msg_controllen; |
| 257 | } |
| 258 | cmhdr.cmsg_level = level; |
| 259 | cmhdr.cmsg_type = type; |
| 260 | cmhdr.cmsg_len = cmlen; |
| 261 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 262 | if (copy_to_user(cm, &cmhdr, sizeof cmhdr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | return -EFAULT; |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 264 | if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | return -EFAULT; |
| 266 | cmlen = CMSG_COMPAT_SPACE(len); |
Wei Yongjun | 1ac70e7 | 2007-12-20 14:36:44 -0800 | [diff] [blame] | 267 | if (kmsg->msg_controllen < cmlen) |
| 268 | cmlen = kmsg->msg_controllen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | kmsg->msg_control += cmlen; |
| 270 | kmsg->msg_controllen -= cmlen; |
| 271 | return 0; |
| 272 | } |
| 273 | |
| 274 | void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm) |
| 275 | { |
| 276 | struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; |
| 277 | int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int); |
| 278 | int fdnum = scm->fp->count; |
| 279 | struct file **fp = scm->fp->fp; |
| 280 | int __user *cmfptr; |
| 281 | int err = 0, i; |
| 282 | |
| 283 | if (fdnum < fdmax) |
| 284 | fdmax = fdnum; |
| 285 | |
| 286 | for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) { |
| 287 | int new_fd; |
| 288 | err = security_file_receive(fp[i]); |
| 289 | if (err) |
| 290 | break; |
Ulrich Drepper | 4a19542 | 2007-07-15 23:40:34 -0700 | [diff] [blame] | 291 | err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags |
| 292 | ? O_CLOEXEC : 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | if (err < 0) |
| 294 | break; |
| 295 | new_fd = err; |
| 296 | err = put_user(new_fd, cmfptr); |
| 297 | if (err) { |
| 298 | put_unused_fd(new_fd); |
| 299 | break; |
| 300 | } |
| 301 | /* Bump the usage count and install the file. */ |
| 302 | get_file(fp[i]); |
| 303 | fd_install(new_fd, fp[i]); |
| 304 | } |
| 305 | |
| 306 | if (i > 0) { |
| 307 | int cmlen = CMSG_COMPAT_LEN(i * sizeof(int)); |
Miklos Szeredi | effee6a | 2006-10-09 21:42:14 -0700 | [diff] [blame] | 308 | err = put_user(SOL_SOCKET, &cm->cmsg_level); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | if (!err) |
| 310 | err = put_user(SCM_RIGHTS, &cm->cmsg_type); |
| 311 | if (!err) |
| 312 | err = put_user(cmlen, &cm->cmsg_len); |
| 313 | if (!err) { |
| 314 | cmlen = CMSG_COMPAT_SPACE(i * sizeof(int)); |
| 315 | kmsg->msg_control += cmlen; |
| 316 | kmsg->msg_controllen -= cmlen; |
| 317 | } |
| 318 | } |
| 319 | if (i < fdnum) |
| 320 | kmsg->msg_flags |= MSG_CTRUNC; |
| 321 | |
| 322 | /* |
| 323 | * All of the files that fit in the message have had their |
| 324 | * usage counts incremented, so we just free the list. |
| 325 | */ |
| 326 | __scm_destroy(scm); |
| 327 | } |
| 328 | |
| 329 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | * A struct sock_filter is architecture independent. |
| 331 | */ |
| 332 | struct compat_sock_fprog { |
| 333 | u16 len; |
| 334 | compat_uptr_t filter; /* struct sock_filter * */ |
| 335 | }; |
| 336 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 337 | static int do_set_attach_filter(struct socket *sock, int level, int optname, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 338 | char __user *optval, unsigned int optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | { |
| 340 | struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval; |
YOSHIFUJI Hideaki | 4768fbc | 2007-02-09 23:25:31 +0900 | [diff] [blame] | 341 | struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | compat_uptr_t ptr; |
| 343 | u16 len; |
| 344 | |
| 345 | if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) || |
| 346 | !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) || |
| 347 | __get_user(len, &fprog32->len) || |
| 348 | __get_user(ptr, &fprog32->filter) || |
| 349 | __put_user(len, &kfprog->len) || |
| 350 | __put_user(compat_ptr(ptr), &kfprog->filter)) |
| 351 | return -EFAULT; |
| 352 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 353 | return sock_setsockopt(sock, level, optname, (char __user *)kfprog, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | sizeof(struct sock_fprog)); |
| 355 | } |
| 356 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 357 | static int do_set_sock_timeout(struct socket *sock, int level, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 358 | int optname, char __user *optval, unsigned int optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 360 | struct compat_timeval __user *up = (struct compat_timeval __user *)optval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | struct timeval ktime; |
| 362 | mm_segment_t old_fs; |
| 363 | int err; |
| 364 | |
| 365 | if (optlen < sizeof(*up)) |
| 366 | return -EINVAL; |
| 367 | if (!access_ok(VERIFY_READ, up, sizeof(*up)) || |
| 368 | __get_user(ktime.tv_sec, &up->tv_sec) || |
| 369 | __get_user(ktime.tv_usec, &up->tv_usec)) |
| 370 | return -EFAULT; |
| 371 | old_fs = get_fs(); |
| 372 | set_fs(KERNEL_DS); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 373 | err = sock_setsockopt(sock, level, optname, (char *)&ktime, sizeof(ktime)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | set_fs(old_fs); |
| 375 | |
| 376 | return err; |
| 377 | } |
| 378 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 379 | static int compat_sock_setsockopt(struct socket *sock, int level, int optname, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 380 | char __user *optval, unsigned int optlen) |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 381 | { |
| 382 | if (optname == SO_ATTACH_FILTER) |
| 383 | return do_set_attach_filter(sock, level, optname, |
| 384 | optval, optlen); |
| 385 | if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) |
| 386 | return do_set_sock_timeout(sock, level, optname, optval, optlen); |
| 387 | |
| 388 | return sock_setsockopt(sock, level, optname, optval, optlen); |
| 389 | } |
| 390 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | asmlinkage long compat_sys_setsockopt(int fd, int level, int optname, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 392 | char __user *optval, unsigned int optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | { |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 394 | int err; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 395 | struct socket *sock = sockfd_lookup(fd, &err); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 396 | |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 397 | if (sock) { |
| 398 | err = security_socket_setsockopt(sock, level, optname); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 399 | if (err) { |
| 400 | sockfd_put(sock); |
| 401 | return err; |
| 402 | } |
| 403 | |
| 404 | if (level == SOL_SOCKET) |
| 405 | err = compat_sock_setsockopt(sock, level, |
| 406 | optname, optval, optlen); |
| 407 | else if (sock->ops->compat_setsockopt) |
| 408 | err = sock->ops->compat_setsockopt(sock, level, |
| 409 | optname, optval, optlen); |
| 410 | else |
| 411 | err = sock->ops->setsockopt(sock, level, |
| 412 | optname, optval, optlen); |
| 413 | sockfd_put(sock); |
| 414 | } |
| 415 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | } |
| 417 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 418 | static int do_get_sock_timeout(struct socket *sock, int level, int optname, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | char __user *optval, int __user *optlen) |
| 420 | { |
| 421 | struct compat_timeval __user *up; |
| 422 | struct timeval ktime; |
| 423 | mm_segment_t old_fs; |
| 424 | int len, err; |
| 425 | |
| 426 | up = (struct compat_timeval __user *) optval; |
| 427 | if (get_user(len, optlen)) |
| 428 | return -EFAULT; |
| 429 | if (len < sizeof(*up)) |
| 430 | return -EINVAL; |
| 431 | len = sizeof(ktime); |
| 432 | old_fs = get_fs(); |
| 433 | set_fs(KERNEL_DS); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 434 | err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | set_fs(old_fs); |
| 436 | |
| 437 | if (!err) { |
| 438 | if (put_user(sizeof(*up), optlen) || |
| 439 | !access_ok(VERIFY_WRITE, up, sizeof(*up)) || |
| 440 | __put_user(ktime.tv_sec, &up->tv_sec) || |
| 441 | __put_user(ktime.tv_usec, &up->tv_usec)) |
| 442 | err = -EFAULT; |
| 443 | } |
| 444 | return err; |
| 445 | } |
| 446 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 447 | static int compat_sock_getsockopt(struct socket *sock, int level, int optname, |
| 448 | char __user *optval, int __user *optlen) |
| 449 | { |
| 450 | if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) |
| 451 | return do_get_sock_timeout(sock, level, optname, optval, optlen); |
| 452 | return sock_getsockopt(sock, level, optname, optval, optlen); |
| 453 | } |
| 454 | |
Shaun Pereira | f0ac261 | 2006-03-21 23:59:39 -0800 | [diff] [blame] | 455 | int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp) |
| 456 | { |
| 457 | struct compat_timeval __user *ctv = |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 458 | (struct compat_timeval __user *) userstamp; |
Shaun Pereira | f0ac261 | 2006-03-21 23:59:39 -0800 | [diff] [blame] | 459 | int err = -ENOENT; |
Eric Dumazet | b7aa0bf | 2007-04-19 16:16:32 -0700 | [diff] [blame] | 460 | struct timeval tv; |
Shaun Pereira | f0ac261 | 2006-03-21 23:59:39 -0800 | [diff] [blame] | 461 | |
| 462 | if (!sock_flag(sk, SOCK_TIMESTAMP)) |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 463 | sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
Eric Dumazet | b7aa0bf | 2007-04-19 16:16:32 -0700 | [diff] [blame] | 464 | tv = ktime_to_timeval(sk->sk_stamp); |
| 465 | if (tv.tv_sec == -1) |
Shaun Pereira | f0ac261 | 2006-03-21 23:59:39 -0800 | [diff] [blame] | 466 | return err; |
Eric Dumazet | b7aa0bf | 2007-04-19 16:16:32 -0700 | [diff] [blame] | 467 | if (tv.tv_sec == 0) { |
| 468 | sk->sk_stamp = ktime_get_real(); |
| 469 | tv = ktime_to_timeval(sk->sk_stamp); |
| 470 | } |
| 471 | err = 0; |
| 472 | if (put_user(tv.tv_sec, &ctv->tv_sec) || |
| 473 | put_user(tv.tv_usec, &ctv->tv_usec)) |
Shaun Pereira | f0ac261 | 2006-03-21 23:59:39 -0800 | [diff] [blame] | 474 | err = -EFAULT; |
| 475 | return err; |
| 476 | } |
| 477 | EXPORT_SYMBOL(compat_sock_get_timestamp); |
| 478 | |
Eric Dumazet | ae40eb1 | 2007-03-18 17:33:16 -0700 | [diff] [blame] | 479 | int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp) |
| 480 | { |
| 481 | struct compat_timespec __user *ctv = |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 482 | (struct compat_timespec __user *) userstamp; |
Eric Dumazet | ae40eb1 | 2007-03-18 17:33:16 -0700 | [diff] [blame] | 483 | int err = -ENOENT; |
| 484 | struct timespec ts; |
| 485 | |
| 486 | if (!sock_flag(sk, SOCK_TIMESTAMP)) |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 487 | sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
Eric Dumazet | ae40eb1 | 2007-03-18 17:33:16 -0700 | [diff] [blame] | 488 | ts = ktime_to_timespec(sk->sk_stamp); |
| 489 | if (ts.tv_sec == -1) |
| 490 | return err; |
| 491 | if (ts.tv_sec == 0) { |
| 492 | sk->sk_stamp = ktime_get_real(); |
| 493 | ts = ktime_to_timespec(sk->sk_stamp); |
| 494 | } |
| 495 | err = 0; |
| 496 | if (put_user(ts.tv_sec, &ctv->tv_sec) || |
| 497 | put_user(ts.tv_nsec, &ctv->tv_nsec)) |
| 498 | err = -EFAULT; |
| 499 | return err; |
| 500 | } |
| 501 | EXPORT_SYMBOL(compat_sock_get_timestampns); |
| 502 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | asmlinkage long compat_sys_getsockopt(int fd, int level, int optname, |
| 504 | char __user *optval, int __user *optlen) |
| 505 | { |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 506 | int err; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 507 | struct socket *sock = sockfd_lookup(fd, &err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 509 | if (sock) { |
| 510 | err = security_socket_getsockopt(sock, level, optname); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 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 | } |
David L Stevens | dae5029 | 2008-04-27 01:06:07 -0700 | [diff] [blame] | 529 | |
| 530 | struct compat_group_req { |
| 531 | __u32 gr_interface; |
| 532 | struct __kernel_sockaddr_storage gr_group |
| 533 | __attribute__ ((aligned(4))); |
Eric Dumazet | bc10502 | 2010-06-03 03:21:52 -0700 | [diff] [blame] | 534 | } __packed; |
David L Stevens | dae5029 | 2008-04-27 01:06:07 -0700 | [diff] [blame] | 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))); |
Eric Dumazet | bc10502 | 2010-06-03 03:21:52 -0700 | [diff] [blame] | 542 | } __packed; |
David L Stevens | dae5029 | 2008-04-27 01:06:07 -0700 | [diff] [blame] | 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))); |
Eric Dumazet | bc10502 | 2010-06-03 03:21:52 -0700 | [diff] [blame] | 552 | } __packed; |
David L Stevens | dae5029 | 2008-04-27 01:06:07 -0700 | [diff] [blame] | 553 | |
David L Stevens | be666e0a | 2008-04-29 03:23:00 -0700 | [diff] [blame] | 554 | #define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \ |
| 555 | sizeof(struct __kernel_sockaddr_storage)) |
| 556 | |
David L Stevens | dae5029 | 2008-04-27 01:06:07 -0700 | [diff] [blame] | 557 | |
| 558 | int compat_mc_setsockopt(struct sock *sock, int level, int optname, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 559 | char __user *optval, unsigned int optlen, |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 560 | int (*setsockopt)(struct sock *, int, int, char __user *, unsigned int)) |
David L Stevens | dae5029 | 2008-04-27 01:06:07 -0700 | [diff] [blame] | 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; |
David L Stevens | be666e0a | 2008-04-29 03:23:00 -0700 | [diff] [blame] | 591 | struct group_source_req __user *kgsr = compat_alloc_user_space( |
David L Stevens | dae5029 | 2008-04-27 01:06:07 -0700 | [diff] [blame] | 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; |
David L Stevens | be666e0a | 2008-04-29 03:23:00 -0700 | [diff] [blame] | 612 | struct group_filter __user *kgf; |
David L Stevens | dae5029 | 2008-04-27 01:06:07 -0700 | [diff] [blame] | 613 | u32 interface, fmode, numsrc; |
| 614 | |
David L Stevens | be666e0a | 2008-04-29 03:23:00 -0700 | [diff] [blame] | 615 | if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || |
David L Stevens | dae5029 | 2008-04-27 01:06:07 -0700 | [diff] [blame] | 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)) || |
David L Stevens | be666e0a | 2008-04-29 03:23:00 -0700 | [diff] [blame] | 631 | (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist, |
David L Stevens | dae5029 | 2008-04-27 01:06:07 -0700 | [diff] [blame] | 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 | } |
David L Stevens | dae5029 | 2008-04-27 01:06:07 -0700 | [diff] [blame] | 643 | EXPORT_SYMBOL(compat_mc_setsockopt); |
| 644 | |
David L Stevens | 42908c6 | 2008-04-29 03:23:22 -0700 | [diff] [blame] | 645 | int compat_mc_getsockopt(struct sock *sock, int level, int optname, |
| 646 | char __user *optval, int __user *optlen, |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 647 | int (*getsockopt)(struct sock *, int, int, char __user *, int __user *)) |
David L Stevens | 42908c6 | 2008-04-29 03:23:22 -0700 | [diff] [blame] | 648 | { |
| 649 | struct compat_group_filter __user *gf32 = (void *)optval; |
| 650 | struct group_filter __user *kgf; |
| 651 | int __user *koptlen; |
| 652 | u32 interface, fmode, numsrc; |
| 653 | int klen, ulen, err; |
| 654 | |
| 655 | if (optname != MCAST_MSFILTER) |
| 656 | return getsockopt(sock, level, optname, optval, optlen); |
| 657 | |
| 658 | koptlen = compat_alloc_user_space(sizeof(*koptlen)); |
| 659 | if (!access_ok(VERIFY_READ, optlen, sizeof(*optlen)) || |
| 660 | __get_user(ulen, optlen)) |
| 661 | return -EFAULT; |
| 662 | |
| 663 | /* adjust len for pad */ |
| 664 | klen = ulen + sizeof(*kgf) - sizeof(*gf32); |
| 665 | |
| 666 | if (klen < GROUP_FILTER_SIZE(0)) |
| 667 | return -EINVAL; |
| 668 | |
| 669 | if (!access_ok(VERIFY_WRITE, koptlen, sizeof(*koptlen)) || |
| 670 | __put_user(klen, koptlen)) |
| 671 | return -EFAULT; |
| 672 | |
| 673 | /* have to allow space for previous compat_alloc_user_space, too */ |
| 674 | kgf = compat_alloc_user_space(klen+sizeof(*optlen)); |
| 675 | |
| 676 | if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || |
| 677 | __get_user(interface, &gf32->gf_interface) || |
| 678 | __get_user(fmode, &gf32->gf_fmode) || |
| 679 | __get_user(numsrc, &gf32->gf_numsrc) || |
| 680 | __put_user(interface, &kgf->gf_interface) || |
| 681 | __put_user(fmode, &kgf->gf_fmode) || |
| 682 | __put_user(numsrc, &kgf->gf_numsrc) || |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 683 | copy_in_user(&kgf->gf_group, &gf32->gf_group, sizeof(kgf->gf_group))) |
David L Stevens | 42908c6 | 2008-04-29 03:23:22 -0700 | [diff] [blame] | 684 | return -EFAULT; |
| 685 | |
| 686 | err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen); |
| 687 | if (err) |
| 688 | return err; |
| 689 | |
| 690 | if (!access_ok(VERIFY_READ, koptlen, sizeof(*koptlen)) || |
| 691 | __get_user(klen, koptlen)) |
| 692 | return -EFAULT; |
| 693 | |
| 694 | ulen = klen - (sizeof(*kgf)-sizeof(*gf32)); |
| 695 | |
| 696 | if (!access_ok(VERIFY_WRITE, optlen, sizeof(*optlen)) || |
| 697 | __put_user(ulen, optlen)) |
| 698 | return -EFAULT; |
| 699 | |
| 700 | if (!access_ok(VERIFY_READ, kgf, klen) || |
| 701 | !access_ok(VERIFY_WRITE, gf32, ulen) || |
| 702 | __get_user(interface, &kgf->gf_interface) || |
| 703 | __get_user(fmode, &kgf->gf_fmode) || |
| 704 | __get_user(numsrc, &kgf->gf_numsrc) || |
| 705 | __put_user(interface, &gf32->gf_interface) || |
| 706 | __put_user(fmode, &gf32->gf_fmode) || |
| 707 | __put_user(numsrc, &gf32->gf_numsrc)) |
| 708 | return -EFAULT; |
| 709 | if (numsrc) { |
| 710 | int copylen; |
| 711 | |
| 712 | klen -= GROUP_FILTER_SIZE(0); |
| 713 | copylen = numsrc * sizeof(gf32->gf_slist[0]); |
| 714 | if (copylen > klen) |
| 715 | copylen = klen; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 716 | if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen)) |
David L Stevens | 42908c6 | 2008-04-29 03:23:22 -0700 | [diff] [blame] | 717 | return -EFAULT; |
| 718 | } |
| 719 | return err; |
| 720 | } |
David L Stevens | 42908c6 | 2008-04-29 03:23:22 -0700 | [diff] [blame] | 721 | EXPORT_SYMBOL(compat_mc_getsockopt); |
| 722 | |
David L Stevens | dae5029 | 2008-04-27 01:06:07 -0700 | [diff] [blame] | 723 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | /* Argument list sizes for compat_sys_socketcall */ |
| 725 | #define AL(x) ((x) * sizeof(u32)) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 726 | static unsigned char nas[21] = { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 727 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
| 728 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), |
| 729 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 730 | AL(4), AL(5), AL(4) |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 731 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 739 | asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, |
| 740 | unsigned vlen, unsigned int flags) |
| 741 | { |
| 742 | return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, |
| 743 | flags | MSG_CMSG_COMPAT); |
| 744 | } |
| 745 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags) |
| 747 | { |
| 748 | return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); |
| 749 | } |
| 750 | |
Johannes Berg | 1dacc76 | 2009-07-01 11:26:02 +0000 | [diff] [blame] | 751 | asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len, unsigned flags) |
| 752 | { |
| 753 | return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT); |
| 754 | } |
| 755 | |
| 756 | asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, size_t len, |
| 757 | unsigned flags, struct sockaddr __user *addr, |
| 758 | int __user *addrlen) |
| 759 | { |
| 760 | return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen); |
| 761 | } |
| 762 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 763 | asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg, |
| 764 | unsigned vlen, unsigned int flags, |
Heiko Carstens | 60c2ffd | 2009-12-09 20:58:16 +0000 | [diff] [blame] | 765 | struct compat_timespec __user *timeout) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 766 | { |
| 767 | int datagrams; |
| 768 | struct timespec ktspec; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 769 | |
Jean-Mickael Guerin | 5b23136 | 2009-12-01 07:52:16 +0000 | [diff] [blame] | 770 | if (timeout == NULL) |
| 771 | return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, |
| 772 | flags | MSG_CMSG_COMPAT, NULL); |
| 773 | |
Heiko Carstens | de039f0 | 2009-12-09 20:59:15 +0000 | [diff] [blame] | 774 | if (get_compat_timespec(&ktspec, timeout)) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 775 | return -EFAULT; |
| 776 | |
| 777 | datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, |
| 778 | flags | MSG_CMSG_COMPAT, &ktspec); |
Heiko Carstens | de039f0 | 2009-12-09 20:59:15 +0000 | [diff] [blame] | 779 | if (datagrams > 0 && put_compat_timespec(&ktspec, timeout)) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 780 | datagrams = -EFAULT; |
| 781 | |
| 782 | return datagrams; |
| 783 | } |
| 784 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | asmlinkage long compat_sys_socketcall(int call, u32 __user *args) |
| 786 | { |
| 787 | int ret; |
| 788 | u32 a[6]; |
| 789 | u32 a0, a1; |
YOSHIFUJI Hideaki | 4768fbc | 2007-02-09 23:25:31 +0900 | [diff] [blame] | 790 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 791 | if (call < SYS_SOCKET || call > SYS_SENDMMSG) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | return -EINVAL; |
| 793 | if (copy_from_user(a, args, nas[call])) |
| 794 | return -EFAULT; |
| 795 | a0 = a[0]; |
| 796 | a1 = a[1]; |
YOSHIFUJI Hideaki | 4768fbc | 2007-02-09 23:25:31 +0900 | [diff] [blame] | 797 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 798 | switch (call) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | case SYS_SOCKET: |
| 800 | ret = sys_socket(a0, a1, a[2]); |
| 801 | break; |
| 802 | case SYS_BIND: |
| 803 | ret = sys_bind(a0, compat_ptr(a1), a[2]); |
| 804 | break; |
| 805 | case SYS_CONNECT: |
| 806 | ret = sys_connect(a0, compat_ptr(a1), a[2]); |
| 807 | break; |
| 808 | case SYS_LISTEN: |
| 809 | ret = sys_listen(a0, a1); |
| 810 | break; |
| 811 | case SYS_ACCEPT: |
Ulrich Drepper | de11def | 2008-11-19 15:36:14 -0800 | [diff] [blame] | 812 | ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | break; |
| 814 | case SYS_GETSOCKNAME: |
| 815 | ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2])); |
| 816 | break; |
| 817 | case SYS_GETPEERNAME: |
| 818 | ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2])); |
| 819 | break; |
| 820 | case SYS_SOCKETPAIR: |
| 821 | ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3])); |
| 822 | break; |
| 823 | case SYS_SEND: |
| 824 | ret = sys_send(a0, compat_ptr(a1), a[2], a[3]); |
| 825 | break; |
| 826 | case SYS_SENDTO: |
| 827 | ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]); |
| 828 | break; |
| 829 | case SYS_RECV: |
Johannes Berg | 1dacc76 | 2009-07-01 11:26:02 +0000 | [diff] [blame] | 830 | ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | break; |
| 832 | case SYS_RECVFROM: |
Johannes Berg | 1dacc76 | 2009-07-01 11:26:02 +0000 | [diff] [blame] | 833 | ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], |
| 834 | compat_ptr(a[4]), compat_ptr(a[5])); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | break; |
| 836 | case SYS_SHUTDOWN: |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 837 | ret = sys_shutdown(a0, a1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | break; |
| 839 | case SYS_SETSOCKOPT: |
| 840 | ret = compat_sys_setsockopt(a0, a1, a[2], |
| 841 | compat_ptr(a[3]), a[4]); |
| 842 | break; |
| 843 | case SYS_GETSOCKOPT: |
| 844 | ret = compat_sys_getsockopt(a0, a1, a[2], |
| 845 | compat_ptr(a[3]), compat_ptr(a[4])); |
| 846 | break; |
| 847 | case SYS_SENDMSG: |
| 848 | ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]); |
| 849 | break; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 850 | case SYS_SENDMMSG: |
| 851 | ret = compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]); |
| 852 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | case SYS_RECVMSG: |
| 854 | ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]); |
| 855 | break; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 856 | case SYS_RECVMMSG: |
| 857 | ret = compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3], |
| 858 | compat_ptr(a[4])); |
| 859 | break; |
Ulrich Drepper | de11def | 2008-11-19 15:36:14 -0800 | [diff] [blame] | 860 | case SYS_ACCEPT4: |
| 861 | ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]); |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 862 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | default: |
| 864 | ret = -EINVAL; |
| 865 | break; |
| 866 | } |
| 867 | return ret; |
| 868 | } |