1 /* 2 * 32bit Socket syscall emulation. Based on arch/sparc64/kernel/sys_sparc32.c. 3 * 4 * Copyright (C) 2000 VA Linux Co 5 * Copyright (C) 2000 Don Dugger <n0ano@valinux.com> 6 * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com> 7 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) 8 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu) 9 * Copyright (C) 2000 Hewlett-Packard Co. 10 * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com> 11 * Copyright (C) 2000,2001 Andi Kleen, SuSE Labs 12 */ 13 14 #include <linux/kernel.h> 15 #include <linux/gfp.h> 16 #include <linux/fs.h> 17 #include <linux/types.h> 18 #include <linux/file.h> 19 #include <linux/icmpv6.h> 20 #include <linux/socket.h> 21 #include <linux/syscalls.h> 22 #include <linux/filter.h> 23 #include <linux/compat.h> 24 #include <linux/security.h> 25 #include <linux/export.h> 26 27 #include <net/scm.h> 28 #include <net/sock.h> 29 #include <net/ip.h> 30 #include <net/ipv6.h> 31 #include <asm/uaccess.h> 32 #include <net/compat.h> 33 34 ssize_t get_compat_msghdr(struct msghdr *kmsg, 35 struct compat_msghdr __user *umsg, 36 struct sockaddr __user **save_addr, 37 struct iovec **iov) 38 { 39 compat_uptr_t uaddr, uiov, tmp3; 40 compat_size_t nr_segs; 41 ssize_t err; 42 43 if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) || 44 __get_user(uaddr, &umsg->msg_name) || 45 __get_user(kmsg->msg_namelen, &umsg->msg_namelen) || 46 __get_user(uiov, &umsg->msg_iov) || 47 __get_user(nr_segs, &umsg->msg_iovlen) || 48 __get_user(tmp3, &umsg->msg_control) || 49 __get_user(kmsg->msg_controllen, &umsg->msg_controllen) || 50 __get_user(kmsg->msg_flags, &umsg->msg_flags)) 51 return -EFAULT; 52 53 if (!uaddr) 54 kmsg->msg_namelen = 0; 55 56 if (kmsg->msg_namelen < 0) 57 return -EINVAL; 58 59 if (kmsg->msg_namelen > sizeof(struct sockaddr_storage)) 60 kmsg->msg_namelen = sizeof(struct sockaddr_storage); 61 kmsg->msg_control = compat_ptr(tmp3); 62 63 if (save_addr) 64 *save_addr = compat_ptr(uaddr); 65 66 if (uaddr && kmsg->msg_namelen) { 67 if (!save_addr) { 68 err = move_addr_to_kernel(compat_ptr(uaddr), 69 kmsg->msg_namelen, 70 kmsg->msg_name); 71 if (err < 0) 72 return err; 73 } 74 } else { 75 kmsg->msg_name = NULL; 76 kmsg->msg_namelen = 0; 77 } 78 79 if (nr_segs > UIO_MAXIOV) 80 return -EMSGSIZE; 81 82 err = compat_rw_copy_check_uvector(save_addr ? READ : WRITE, 83 compat_ptr(uiov), nr_segs, 84 UIO_FASTIOV, *iov, iov); 85 if (err >= 0) 86 iov_iter_init(&kmsg->msg_iter, save_addr ? READ : WRITE, 87 *iov, nr_segs, err); 88 return err; 89 } 90 91 /* Bleech... */ 92 #define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32)) 93 94 #define CMSG_COMPAT_DATA(cmsg) \ 95 ((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)))) 96 #define CMSG_COMPAT_SPACE(len) \ 97 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len)) 98 #define CMSG_COMPAT_LEN(len) \ 99 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len)) 100 101 #define CMSG_COMPAT_FIRSTHDR(msg) \ 102 (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \ 103 (struct compat_cmsghdr __user *)((msg)->msg_control) : \ 104 (struct compat_cmsghdr __user *)NULL) 105 106 #define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \ 107 ((ucmlen) >= sizeof(struct compat_cmsghdr) && \ 108 (ucmlen) <= (unsigned long) \ 109 ((mhdr)->msg_controllen - \ 110 ((char *)(ucmsg) - (char *)(mhdr)->msg_control))) 111 112 static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg, 113 struct compat_cmsghdr __user *cmsg, int cmsg_len) 114 { 115 char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len); 116 if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) > 117 msg->msg_controllen) 118 return NULL; 119 return (struct compat_cmsghdr __user *)ptr; 120 } 121 122 /* There is a lot of hair here because the alignment rules (and 123 * thus placement) of cmsg headers and length are different for 124 * 32-bit apps. -DaveM 125 */ 126 int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk, 127 unsigned char *stackbuf, int stackbuf_size) 128 { 129 struct compat_cmsghdr __user *ucmsg; 130 struct cmsghdr *kcmsg, *kcmsg_base; 131 compat_size_t ucmlen; 132 __kernel_size_t kcmlen, tmp; 133 int err = -EFAULT; 134 135 kcmlen = 0; 136 kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf; 137 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); 138 while (ucmsg != NULL) { 139 if (get_user(ucmlen, &ucmsg->cmsg_len)) 140 return -EFAULT; 141 142 /* Catch bogons. */ 143 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) 144 return -EINVAL; 145 146 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + 147 CMSG_ALIGN(sizeof(struct cmsghdr))); 148 tmp = CMSG_ALIGN(tmp); 149 kcmlen += tmp; 150 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); 151 } 152 if (kcmlen == 0) 153 return -EINVAL; 154 155 /* The kcmlen holds the 64-bit version of the control length. 156 * It may not be modified as we do not stick it into the kmsg 157 * until we have successfully copied over all of the data 158 * from the user. 159 */ 160 if (kcmlen > stackbuf_size) 161 kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL); 162 if (kcmsg == NULL) 163 return -ENOBUFS; 164 165 /* Now copy them over neatly. */ 166 memset(kcmsg, 0, kcmlen); 167 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); 168 while (ucmsg != NULL) { 169 if (__get_user(ucmlen, &ucmsg->cmsg_len)) 170 goto Efault; 171 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) 172 goto Einval; 173 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + 174 CMSG_ALIGN(sizeof(struct cmsghdr))); 175 if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp)) 176 goto Einval; 177 kcmsg->cmsg_len = tmp; 178 tmp = CMSG_ALIGN(tmp); 179 if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) || 180 __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) || 181 copy_from_user(CMSG_DATA(kcmsg), 182 CMSG_COMPAT_DATA(ucmsg), 183 (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))))) 184 goto Efault; 185 186 /* Advance. */ 187 kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp); 188 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); 189 } 190 191 /* Ok, looks like we made it. Hook it up and return success. */ 192 kmsg->msg_control = kcmsg_base; 193 kmsg->msg_controllen = kcmlen; 194 return 0; 195 196 Einval: 197 err = -EINVAL; 198 Efault: 199 if (kcmsg_base != (struct cmsghdr *)stackbuf) 200 sock_kfree_s(sk, kcmsg_base, kcmlen); 201 return err; 202 } 203 204 int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data) 205 { 206 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; 207 struct compat_cmsghdr cmhdr; 208 struct compat_timeval ctv; 209 struct compat_timespec cts[3]; 210 int cmlen; 211 212 if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) { 213 kmsg->msg_flags |= MSG_CTRUNC; 214 return 0; /* XXX: return error? check spec. */ 215 } 216 217 if (!COMPAT_USE_64BIT_TIME) { 218 if (level == SOL_SOCKET && type == SCM_TIMESTAMP) { 219 struct timeval *tv = (struct timeval *)data; 220 ctv.tv_sec = tv->tv_sec; 221 ctv.tv_usec = tv->tv_usec; 222 data = &ctv; 223 len = sizeof(ctv); 224 } 225 if (level == SOL_SOCKET && 226 (type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) { 227 int count = type == SCM_TIMESTAMPNS ? 1 : 3; 228 int i; 229 struct timespec *ts = (struct timespec *)data; 230 for (i = 0; i < count; i++) { 231 cts[i].tv_sec = ts[i].tv_sec; 232 cts[i].tv_nsec = ts[i].tv_nsec; 233 } 234 data = &cts; 235 len = sizeof(cts[0]) * count; 236 } 237 } 238 239 cmlen = CMSG_COMPAT_LEN(len); 240 if (kmsg->msg_controllen < cmlen) { 241 kmsg->msg_flags |= MSG_CTRUNC; 242 cmlen = kmsg->msg_controllen; 243 } 244 cmhdr.cmsg_level = level; 245 cmhdr.cmsg_type = type; 246 cmhdr.cmsg_len = cmlen; 247 248 if (copy_to_user(cm, &cmhdr, sizeof cmhdr)) 249 return -EFAULT; 250 if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr))) 251 return -EFAULT; 252 cmlen = CMSG_COMPAT_SPACE(len); 253 if (kmsg->msg_controllen < cmlen) 254 cmlen = kmsg->msg_controllen; 255 kmsg->msg_control += cmlen; 256 kmsg->msg_controllen -= cmlen; 257 return 0; 258 } 259 260 void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm) 261 { 262 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; 263 int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int); 264 int fdnum = scm->fp->count; 265 struct file **fp = scm->fp->fp; 266 int __user *cmfptr; 267 int err = 0, i; 268 269 if (fdnum < fdmax) 270 fdmax = fdnum; 271 272 for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) { 273 int new_fd; 274 err = security_file_receive(fp[i]); 275 if (err) 276 break; 277 err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags 278 ? O_CLOEXEC : 0); 279 if (err < 0) 280 break; 281 new_fd = err; 282 err = put_user(new_fd, cmfptr); 283 if (err) { 284 put_unused_fd(new_fd); 285 break; 286 } 287 /* Bump the usage count and install the file. */ 288 fd_install(new_fd, get_file(fp[i])); 289 } 290 291 if (i > 0) { 292 int cmlen = CMSG_COMPAT_LEN(i * sizeof(int)); 293 err = put_user(SOL_SOCKET, &cm->cmsg_level); 294 if (!err) 295 err = put_user(SCM_RIGHTS, &cm->cmsg_type); 296 if (!err) 297 err = put_user(cmlen, &cm->cmsg_len); 298 if (!err) { 299 cmlen = CMSG_COMPAT_SPACE(i * sizeof(int)); 300 kmsg->msg_control += cmlen; 301 kmsg->msg_controllen -= cmlen; 302 } 303 } 304 if (i < fdnum) 305 kmsg->msg_flags |= MSG_CTRUNC; 306 307 /* 308 * All of the files that fit in the message have had their 309 * usage counts incremented, so we just free the list. 310 */ 311 __scm_destroy(scm); 312 } 313 314 static int do_set_attach_filter(struct socket *sock, int level, int optname, 315 char __user *optval, unsigned int optlen) 316 { 317 struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval; 318 struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog)); 319 compat_uptr_t ptr; 320 u16 len; 321 322 if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) || 323 !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) || 324 __get_user(len, &fprog32->len) || 325 __get_user(ptr, &fprog32->filter) || 326 __put_user(len, &kfprog->len) || 327 __put_user(compat_ptr(ptr), &kfprog->filter)) 328 return -EFAULT; 329 330 return sock_setsockopt(sock, level, optname, (char __user *)kfprog, 331 sizeof(struct sock_fprog)); 332 } 333 334 static int do_set_sock_timeout(struct socket *sock, int level, 335 int optname, char __user *optval, unsigned int optlen) 336 { 337 struct compat_timeval __user *up = (struct compat_timeval __user *)optval; 338 struct timeval ktime; 339 mm_segment_t old_fs; 340 int err; 341 342 if (optlen < sizeof(*up)) 343 return -EINVAL; 344 if (!access_ok(VERIFY_READ, up, sizeof(*up)) || 345 __get_user(ktime.tv_sec, &up->tv_sec) || 346 __get_user(ktime.tv_usec, &up->tv_usec)) 347 return -EFAULT; 348 old_fs = get_fs(); 349 set_fs(KERNEL_DS); 350 err = sock_setsockopt(sock, level, optname, (char *)&ktime, sizeof(ktime)); 351 set_fs(old_fs); 352 353 return err; 354 } 355 356 static int compat_sock_setsockopt(struct socket *sock, int level, int optname, 357 char __user *optval, unsigned int optlen) 358 { 359 if (optname == SO_ATTACH_FILTER) 360 return do_set_attach_filter(sock, level, optname, 361 optval, optlen); 362 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) 363 return do_set_sock_timeout(sock, level, optname, optval, optlen); 364 365 return sock_setsockopt(sock, level, optname, optval, optlen); 366 } 367 368 COMPAT_SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, 369 char __user *, optval, unsigned int, optlen) 370 { 371 int err; 372 struct socket *sock = sockfd_lookup(fd, &err); 373 374 if (sock) { 375 err = security_socket_setsockopt(sock, level, optname); 376 if (err) { 377 sockfd_put(sock); 378 return err; 379 } 380 381 if (level == SOL_SOCKET) 382 err = compat_sock_setsockopt(sock, level, 383 optname, optval, optlen); 384 else if (sock->ops->compat_setsockopt) 385 err = sock->ops->compat_setsockopt(sock, level, 386 optname, optval, optlen); 387 else 388 err = sock->ops->setsockopt(sock, level, 389 optname, optval, optlen); 390 sockfd_put(sock); 391 } 392 return err; 393 } 394 395 static int do_get_sock_timeout(struct socket *sock, int level, int optname, 396 char __user *optval, int __user *optlen) 397 { 398 struct compat_timeval __user *up; 399 struct timeval ktime; 400 mm_segment_t old_fs; 401 int len, err; 402 403 up = (struct compat_timeval __user *) optval; 404 if (get_user(len, optlen)) 405 return -EFAULT; 406 if (len < sizeof(*up)) 407 return -EINVAL; 408 len = sizeof(ktime); 409 old_fs = get_fs(); 410 set_fs(KERNEL_DS); 411 err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len); 412 set_fs(old_fs); 413 414 if (!err) { 415 if (put_user(sizeof(*up), optlen) || 416 !access_ok(VERIFY_WRITE, up, sizeof(*up)) || 417 __put_user(ktime.tv_sec, &up->tv_sec) || 418 __put_user(ktime.tv_usec, &up->tv_usec)) 419 err = -EFAULT; 420 } 421 return err; 422 } 423 424 static int compat_sock_getsockopt(struct socket *sock, int level, int optname, 425 char __user *optval, int __user *optlen) 426 { 427 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) 428 return do_get_sock_timeout(sock, level, optname, optval, optlen); 429 return sock_getsockopt(sock, level, optname, optval, optlen); 430 } 431 432 int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp) 433 { 434 struct compat_timeval __user *ctv; 435 int err; 436 struct timeval tv; 437 438 if (COMPAT_USE_64BIT_TIME) 439 return sock_get_timestamp(sk, userstamp); 440 441 ctv = (struct compat_timeval __user *) userstamp; 442 err = -ENOENT; 443 if (!sock_flag(sk, SOCK_TIMESTAMP)) 444 sock_enable_timestamp(sk, SOCK_TIMESTAMP); 445 tv = ktime_to_timeval(sk->sk_stamp); 446 if (tv.tv_sec == -1) 447 return err; 448 if (tv.tv_sec == 0) { 449 sk->sk_stamp = ktime_get_real(); 450 tv = ktime_to_timeval(sk->sk_stamp); 451 } 452 err = 0; 453 if (put_user(tv.tv_sec, &ctv->tv_sec) || 454 put_user(tv.tv_usec, &ctv->tv_usec)) 455 err = -EFAULT; 456 return err; 457 } 458 EXPORT_SYMBOL(compat_sock_get_timestamp); 459 460 int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp) 461 { 462 struct compat_timespec __user *ctv; 463 int err; 464 struct timespec ts; 465 466 if (COMPAT_USE_64BIT_TIME) 467 return sock_get_timestampns (sk, userstamp); 468 469 ctv = (struct compat_timespec __user *) userstamp; 470 err = -ENOENT; 471 if (!sock_flag(sk, SOCK_TIMESTAMP)) 472 sock_enable_timestamp(sk, SOCK_TIMESTAMP); 473 ts = ktime_to_timespec(sk->sk_stamp); 474 if (ts.tv_sec == -1) 475 return err; 476 if (ts.tv_sec == 0) { 477 sk->sk_stamp = ktime_get_real(); 478 ts = ktime_to_timespec(sk->sk_stamp); 479 } 480 err = 0; 481 if (put_user(ts.tv_sec, &ctv->tv_sec) || 482 put_user(ts.tv_nsec, &ctv->tv_nsec)) 483 err = -EFAULT; 484 return err; 485 } 486 EXPORT_SYMBOL(compat_sock_get_timestampns); 487 488 COMPAT_SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, 489 char __user *, optval, int __user *, optlen) 490 { 491 int err; 492 struct socket *sock = sockfd_lookup(fd, &err); 493 494 if (sock) { 495 err = security_socket_getsockopt(sock, level, optname); 496 if (err) { 497 sockfd_put(sock); 498 return err; 499 } 500 501 if (level == SOL_SOCKET) 502 err = compat_sock_getsockopt(sock, level, 503 optname, optval, optlen); 504 else if (sock->ops->compat_getsockopt) 505 err = sock->ops->compat_getsockopt(sock, level, 506 optname, optval, optlen); 507 else 508 err = sock->ops->getsockopt(sock, level, 509 optname, optval, optlen); 510 sockfd_put(sock); 511 } 512 return err; 513 } 514 515 struct compat_group_req { 516 __u32 gr_interface; 517 struct __kernel_sockaddr_storage gr_group 518 __attribute__ ((aligned(4))); 519 } __packed; 520 521 struct compat_group_source_req { 522 __u32 gsr_interface; 523 struct __kernel_sockaddr_storage gsr_group 524 __attribute__ ((aligned(4))); 525 struct __kernel_sockaddr_storage gsr_source 526 __attribute__ ((aligned(4))); 527 } __packed; 528 529 struct compat_group_filter { 530 __u32 gf_interface; 531 struct __kernel_sockaddr_storage gf_group 532 __attribute__ ((aligned(4))); 533 __u32 gf_fmode; 534 __u32 gf_numsrc; 535 struct __kernel_sockaddr_storage gf_slist[1] 536 __attribute__ ((aligned(4))); 537 } __packed; 538 539 #define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \ 540 sizeof(struct __kernel_sockaddr_storage)) 541 542 543 int compat_mc_setsockopt(struct sock *sock, int level, int optname, 544 char __user *optval, unsigned int optlen, 545 int (*setsockopt)(struct sock *, int, int, char __user *, unsigned int)) 546 { 547 char __user *koptval = optval; 548 int koptlen = optlen; 549 550 switch (optname) { 551 case MCAST_JOIN_GROUP: 552 case MCAST_LEAVE_GROUP: 553 { 554 struct compat_group_req __user *gr32 = (void *)optval; 555 struct group_req __user *kgr = 556 compat_alloc_user_space(sizeof(struct group_req)); 557 u32 interface; 558 559 if (!access_ok(VERIFY_READ, gr32, sizeof(*gr32)) || 560 !access_ok(VERIFY_WRITE, kgr, sizeof(struct group_req)) || 561 __get_user(interface, &gr32->gr_interface) || 562 __put_user(interface, &kgr->gr_interface) || 563 copy_in_user(&kgr->gr_group, &gr32->gr_group, 564 sizeof(kgr->gr_group))) 565 return -EFAULT; 566 koptval = (char __user *)kgr; 567 koptlen = sizeof(struct group_req); 568 break; 569 } 570 case MCAST_JOIN_SOURCE_GROUP: 571 case MCAST_LEAVE_SOURCE_GROUP: 572 case MCAST_BLOCK_SOURCE: 573 case MCAST_UNBLOCK_SOURCE: 574 { 575 struct compat_group_source_req __user *gsr32 = (void *)optval; 576 struct group_source_req __user *kgsr = compat_alloc_user_space( 577 sizeof(struct group_source_req)); 578 u32 interface; 579 580 if (!access_ok(VERIFY_READ, gsr32, sizeof(*gsr32)) || 581 !access_ok(VERIFY_WRITE, kgsr, 582 sizeof(struct group_source_req)) || 583 __get_user(interface, &gsr32->gsr_interface) || 584 __put_user(interface, &kgsr->gsr_interface) || 585 copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group, 586 sizeof(kgsr->gsr_group)) || 587 copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source, 588 sizeof(kgsr->gsr_source))) 589 return -EFAULT; 590 koptval = (char __user *)kgsr; 591 koptlen = sizeof(struct group_source_req); 592 break; 593 } 594 case MCAST_MSFILTER: 595 { 596 struct compat_group_filter __user *gf32 = (void *)optval; 597 struct group_filter __user *kgf; 598 u32 interface, fmode, numsrc; 599 600 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || 601 __get_user(interface, &gf32->gf_interface) || 602 __get_user(fmode, &gf32->gf_fmode) || 603 __get_user(numsrc, &gf32->gf_numsrc)) 604 return -EFAULT; 605 koptlen = optlen + sizeof(struct group_filter) - 606 sizeof(struct compat_group_filter); 607 if (koptlen < GROUP_FILTER_SIZE(numsrc)) 608 return -EINVAL; 609 kgf = compat_alloc_user_space(koptlen); 610 if (!access_ok(VERIFY_WRITE, kgf, koptlen) || 611 __put_user(interface, &kgf->gf_interface) || 612 __put_user(fmode, &kgf->gf_fmode) || 613 __put_user(numsrc, &kgf->gf_numsrc) || 614 copy_in_user(&kgf->gf_group, &gf32->gf_group, 615 sizeof(kgf->gf_group)) || 616 (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist, 617 numsrc * sizeof(kgf->gf_slist[0])))) 618 return -EFAULT; 619 koptval = (char __user *)kgf; 620 break; 621 } 622 623 default: 624 break; 625 } 626 return setsockopt(sock, level, optname, koptval, koptlen); 627 } 628 EXPORT_SYMBOL(compat_mc_setsockopt); 629 630 int compat_mc_getsockopt(struct sock *sock, int level, int optname, 631 char __user *optval, int __user *optlen, 632 int (*getsockopt)(struct sock *, int, int, char __user *, int __user *)) 633 { 634 struct compat_group_filter __user *gf32 = (void *)optval; 635 struct group_filter __user *kgf; 636 int __user *koptlen; 637 u32 interface, fmode, numsrc; 638 int klen, ulen, err; 639 640 if (optname != MCAST_MSFILTER) 641 return getsockopt(sock, level, optname, optval, optlen); 642 643 koptlen = compat_alloc_user_space(sizeof(*koptlen)); 644 if (!access_ok(VERIFY_READ, optlen, sizeof(*optlen)) || 645 __get_user(ulen, optlen)) 646 return -EFAULT; 647 648 /* adjust len for pad */ 649 klen = ulen + sizeof(*kgf) - sizeof(*gf32); 650 651 if (klen < GROUP_FILTER_SIZE(0)) 652 return -EINVAL; 653 654 if (!access_ok(VERIFY_WRITE, koptlen, sizeof(*koptlen)) || 655 __put_user(klen, koptlen)) 656 return -EFAULT; 657 658 /* have to allow space for previous compat_alloc_user_space, too */ 659 kgf = compat_alloc_user_space(klen+sizeof(*optlen)); 660 661 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || 662 __get_user(interface, &gf32->gf_interface) || 663 __get_user(fmode, &gf32->gf_fmode) || 664 __get_user(numsrc, &gf32->gf_numsrc) || 665 __put_user(interface, &kgf->gf_interface) || 666 __put_user(fmode, &kgf->gf_fmode) || 667 __put_user(numsrc, &kgf->gf_numsrc) || 668 copy_in_user(&kgf->gf_group, &gf32->gf_group, sizeof(kgf->gf_group))) 669 return -EFAULT; 670 671 err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen); 672 if (err) 673 return err; 674 675 if (!access_ok(VERIFY_READ, koptlen, sizeof(*koptlen)) || 676 __get_user(klen, koptlen)) 677 return -EFAULT; 678 679 ulen = klen - (sizeof(*kgf)-sizeof(*gf32)); 680 681 if (!access_ok(VERIFY_WRITE, optlen, sizeof(*optlen)) || 682 __put_user(ulen, optlen)) 683 return -EFAULT; 684 685 if (!access_ok(VERIFY_READ, kgf, klen) || 686 !access_ok(VERIFY_WRITE, gf32, ulen) || 687 __get_user(interface, &kgf->gf_interface) || 688 __get_user(fmode, &kgf->gf_fmode) || 689 __get_user(numsrc, &kgf->gf_numsrc) || 690 __put_user(interface, &gf32->gf_interface) || 691 __put_user(fmode, &gf32->gf_fmode) || 692 __put_user(numsrc, &gf32->gf_numsrc)) 693 return -EFAULT; 694 if (numsrc) { 695 int copylen; 696 697 klen -= GROUP_FILTER_SIZE(0); 698 copylen = numsrc * sizeof(gf32->gf_slist[0]); 699 if (copylen > klen) 700 copylen = klen; 701 if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen)) 702 return -EFAULT; 703 } 704 return err; 705 } 706 EXPORT_SYMBOL(compat_mc_getsockopt); 707 708 709 /* Argument list sizes for compat_sys_socketcall */ 710 #define AL(x) ((x) * sizeof(u32)) 711 static unsigned char nas[21] = { 712 AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), 713 AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), 714 AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), 715 AL(4), AL(5), AL(4) 716 }; 717 #undef AL 718 719 COMPAT_SYSCALL_DEFINE3(sendmsg, int, fd, struct compat_msghdr __user *, msg, unsigned int, flags) 720 { 721 return __sys_sendmsg(fd, (struct user_msghdr __user *)msg, flags | MSG_CMSG_COMPAT); 722 } 723 724 COMPAT_SYSCALL_DEFINE4(sendmmsg, int, fd, struct compat_mmsghdr __user *, mmsg, 725 unsigned int, vlen, unsigned int, flags) 726 { 727 return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, 728 flags | MSG_CMSG_COMPAT); 729 } 730 731 COMPAT_SYSCALL_DEFINE3(recvmsg, int, fd, struct compat_msghdr __user *, msg, unsigned int, flags) 732 { 733 return __sys_recvmsg(fd, (struct user_msghdr __user *)msg, flags | MSG_CMSG_COMPAT); 734 } 735 736 COMPAT_SYSCALL_DEFINE4(recv, int, fd, void __user *, buf, compat_size_t, len, unsigned int, flags) 737 { 738 return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT); 739 } 740 741 COMPAT_SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, buf, compat_size_t, len, 742 unsigned int, flags, struct sockaddr __user *, addr, 743 int __user *, addrlen) 744 { 745 return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen); 746 } 747 748 COMPAT_SYSCALL_DEFINE5(recvmmsg, int, fd, struct compat_mmsghdr __user *, mmsg, 749 unsigned int, vlen, unsigned int, flags, 750 struct compat_timespec __user *, timeout) 751 { 752 int datagrams; 753 struct timespec ktspec; 754 755 if (timeout == NULL) 756 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, 757 flags | MSG_CMSG_COMPAT, NULL); 758 759 if (compat_get_timespec(&ktspec, timeout)) 760 return -EFAULT; 761 762 datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, 763 flags | MSG_CMSG_COMPAT, &ktspec); 764 if (datagrams > 0 && compat_put_timespec(&ktspec, timeout)) 765 datagrams = -EFAULT; 766 767 return datagrams; 768 } 769 770 COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user *, args) 771 { 772 int ret; 773 u32 a[6]; 774 u32 a0, a1; 775 776 if (call < SYS_SOCKET || call > SYS_SENDMMSG) 777 return -EINVAL; 778 if (copy_from_user(a, args, nas[call])) 779 return -EFAULT; 780 a0 = a[0]; 781 a1 = a[1]; 782 783 switch (call) { 784 case SYS_SOCKET: 785 ret = sys_socket(a0, a1, a[2]); 786 break; 787 case SYS_BIND: 788 ret = sys_bind(a0, compat_ptr(a1), a[2]); 789 break; 790 case SYS_CONNECT: 791 ret = sys_connect(a0, compat_ptr(a1), a[2]); 792 break; 793 case SYS_LISTEN: 794 ret = sys_listen(a0, a1); 795 break; 796 case SYS_ACCEPT: 797 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0); 798 break; 799 case SYS_GETSOCKNAME: 800 ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2])); 801 break; 802 case SYS_GETPEERNAME: 803 ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2])); 804 break; 805 case SYS_SOCKETPAIR: 806 ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3])); 807 break; 808 case SYS_SEND: 809 ret = sys_send(a0, compat_ptr(a1), a[2], a[3]); 810 break; 811 case SYS_SENDTO: 812 ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]); 813 break; 814 case SYS_RECV: 815 ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]); 816 break; 817 case SYS_RECVFROM: 818 ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], 819 compat_ptr(a[4]), compat_ptr(a[5])); 820 break; 821 case SYS_SHUTDOWN: 822 ret = sys_shutdown(a0, a1); 823 break; 824 case SYS_SETSOCKOPT: 825 ret = compat_sys_setsockopt(a0, a1, a[2], 826 compat_ptr(a[3]), a[4]); 827 break; 828 case SYS_GETSOCKOPT: 829 ret = compat_sys_getsockopt(a0, a1, a[2], 830 compat_ptr(a[3]), compat_ptr(a[4])); 831 break; 832 case SYS_SENDMSG: 833 ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]); 834 break; 835 case SYS_SENDMMSG: 836 ret = compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]); 837 break; 838 case SYS_RECVMSG: 839 ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]); 840 break; 841 case SYS_RECVMMSG: 842 ret = compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3], 843 compat_ptr(a[4])); 844 break; 845 case SYS_ACCEPT4: 846 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]); 847 break; 848 default: 849 ret = -EINVAL; 850 break; 851 } 852 return ret; 853 } 854