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 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 40 while (niov > 0) { 41 compat_uptr_t buf; 42 compat_size_t len; 43 44 if (get_user(len, &uiov32->iov_len) || 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 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, 82 struct sockaddr_storage *kern_address, int mode) 83 { 84 int tot_len; 85 86 if (kern_msg->msg_namelen) { 87 if (mode == VERIFY_READ) { 88 int err = move_addr_to_kernel(kern_msg->msg_name, 89 kern_msg->msg_namelen, 90 kern_address); 91 if (err < 0) 92 return err; 93 } 94 kern_msg->msg_name = kern_address; 95 } else 96 kern_msg->msg_name = NULL; 97 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); 101 if (tot_len >= 0) 102 kern_msg->msg_iov = kern_iov; 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 */ 142 int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk, 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; 149 int err = -EFAULT; 150 151 kcmlen = 0; 152 kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf; 153 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); 154 while (ucmsg != NULL) { 155 if (get_user(ucmlen, &ucmsg->cmsg_len)) 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))); 164 tmp = CMSG_ALIGN(tmp); 165 kcmlen += tmp; 166 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); 167 } 168 if (kcmlen == 0) 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 */ 176 if (kcmlen > stackbuf_size) 177 kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL); 178 if (kcmsg == NULL) 179 return -ENOBUFS; 180 181 /* Now copy them over neatly. */ 182 memset(kcmsg, 0, kcmlen); 183 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); 184 while (ucmsg != NULL) { 185 if (__get_user(ucmlen, &ucmsg->cmsg_len)) 186 goto Efault; 187 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) 188 goto Einval; 189 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + 190 CMSG_ALIGN(sizeof(struct cmsghdr))); 191 if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp)) 192 goto Einval; 193 kcmsg->cmsg_len = tmp; 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; 201 202 /* Advance. */ 203 kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp); 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; 211 212 Einval: 213 err = -EINVAL; 214 Efault: 215 if (kcmsg_base != (struct cmsghdr *)stackbuf) 216 sock_kfree_s(sk, kcmsg_base, kcmlen); 217 return err; 218 } 219 220 int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data) 221 { 222 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; 223 struct compat_cmsghdr cmhdr; 224 int cmlen; 225 226 if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) { 227 kmsg->msg_flags |= MSG_CTRUNC; 228 return 0; /* XXX: return error? check spec. */ 229 } 230 231 if (!COMPAT_USE_64BIT_TIME) { 232 struct compat_timeval ctv; 233 struct compat_timespec cts[3]; 234 if (level == SOL_SOCKET && type == SCM_TIMESTAMP) { 235 struct timeval *tv = (struct timeval *)data; 236 ctv.tv_sec = tv->tv_sec; 237 ctv.tv_usec = tv->tv_usec; 238 data = &ctv; 239 len = sizeof(ctv); 240 } 241 if (level == SOL_SOCKET && 242 (type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) { 243 int count = type == SCM_TIMESTAMPNS ? 1 : 3; 244 int i; 245 struct timespec *ts = (struct timespec *)data; 246 for (i = 0; i < count; i++) { 247 cts[i].tv_sec = ts[i].tv_sec; 248 cts[i].tv_nsec = ts[i].tv_nsec; 249 } 250 data = &cts; 251 len = sizeof(cts[0]) * count; 252 } 253 } 254 255 cmlen = CMSG_COMPAT_LEN(len); 256 if (kmsg->msg_controllen < cmlen) { 257 kmsg->msg_flags |= MSG_CTRUNC; 258 cmlen = kmsg->msg_controllen; 259 } 260 cmhdr.cmsg_level = level; 261 cmhdr.cmsg_type = type; 262 cmhdr.cmsg_len = cmlen; 263 264 if (copy_to_user(cm, &cmhdr, sizeof cmhdr)) 265 return -EFAULT; 266 if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr))) 267 return -EFAULT; 268 cmlen = CMSG_COMPAT_SPACE(len); 269 if (kmsg->msg_controllen < cmlen) 270 cmlen = kmsg->msg_controllen; 271 kmsg->msg_control += cmlen; 272 kmsg->msg_controllen -= cmlen; 273 return 0; 274 } 275 276 void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm) 277 { 278 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; 279 int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int); 280 int fdnum = scm->fp->count; 281 struct file **fp = scm->fp->fp; 282 int __user *cmfptr; 283 int err = 0, i; 284 285 if (fdnum < fdmax) 286 fdmax = fdnum; 287 288 for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) { 289 int new_fd; 290 err = security_file_receive(fp[i]); 291 if (err) 292 break; 293 err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags 294 ? O_CLOEXEC : 0); 295 if (err < 0) 296 break; 297 new_fd = err; 298 err = put_user(new_fd, cmfptr); 299 if (err) { 300 put_unused_fd(new_fd); 301 break; 302 } 303 /* Bump the usage count and install the file. */ 304 get_file(fp[i]); 305 fd_install(new_fd, fp[i]); 306 } 307 308 if (i > 0) { 309 int cmlen = CMSG_COMPAT_LEN(i * sizeof(int)); 310 err = put_user(SOL_SOCKET, &cm->cmsg_level); 311 if (!err) 312 err = put_user(SCM_RIGHTS, &cm->cmsg_type); 313 if (!err) 314 err = put_user(cmlen, &cm->cmsg_len); 315 if (!err) { 316 cmlen = CMSG_COMPAT_SPACE(i * sizeof(int)); 317 kmsg->msg_control += cmlen; 318 kmsg->msg_controllen -= cmlen; 319 } 320 } 321 if (i < fdnum) 322 kmsg->msg_flags |= MSG_CTRUNC; 323 324 /* 325 * All of the files that fit in the message have had their 326 * usage counts incremented, so we just free the list. 327 */ 328 __scm_destroy(scm); 329 } 330 331 /* 332 * A struct sock_filter is architecture independent. 333 */ 334 struct compat_sock_fprog { 335 u16 len; 336 compat_uptr_t filter; /* struct sock_filter * */ 337 }; 338 339 static int do_set_attach_filter(struct socket *sock, int level, int optname, 340 char __user *optval, unsigned int optlen) 341 { 342 struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval; 343 struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog)); 344 compat_uptr_t ptr; 345 u16 len; 346 347 if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) || 348 !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) || 349 __get_user(len, &fprog32->len) || 350 __get_user(ptr, &fprog32->filter) || 351 __put_user(len, &kfprog->len) || 352 __put_user(compat_ptr(ptr), &kfprog->filter)) 353 return -EFAULT; 354 355 return sock_setsockopt(sock, level, optname, (char __user *)kfprog, 356 sizeof(struct sock_fprog)); 357 } 358 359 static int do_set_sock_timeout(struct socket *sock, int level, 360 int optname, char __user *optval, unsigned int optlen) 361 { 362 struct compat_timeval __user *up = (struct compat_timeval __user *)optval; 363 struct timeval ktime; 364 mm_segment_t old_fs; 365 int err; 366 367 if (optlen < sizeof(*up)) 368 return -EINVAL; 369 if (!access_ok(VERIFY_READ, up, sizeof(*up)) || 370 __get_user(ktime.tv_sec, &up->tv_sec) || 371 __get_user(ktime.tv_usec, &up->tv_usec)) 372 return -EFAULT; 373 old_fs = get_fs(); 374 set_fs(KERNEL_DS); 375 err = sock_setsockopt(sock, level, optname, (char *)&ktime, sizeof(ktime)); 376 set_fs(old_fs); 377 378 return err; 379 } 380 381 static int compat_sock_setsockopt(struct socket *sock, int level, int optname, 382 char __user *optval, unsigned int optlen) 383 { 384 if (optname == SO_ATTACH_FILTER) 385 return do_set_attach_filter(sock, level, optname, 386 optval, optlen); 387 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) 388 return do_set_sock_timeout(sock, level, optname, optval, optlen); 389 390 return sock_setsockopt(sock, level, optname, optval, optlen); 391 } 392 393 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname, 394 char __user *optval, unsigned int optlen) 395 { 396 int err; 397 struct socket *sock = sockfd_lookup(fd, &err); 398 399 if (sock) { 400 err = security_socket_setsockopt(sock, level, optname); 401 if (err) { 402 sockfd_put(sock); 403 return err; 404 } 405 406 if (level == SOL_SOCKET) 407 err = compat_sock_setsockopt(sock, level, 408 optname, optval, optlen); 409 else if (sock->ops->compat_setsockopt) 410 err = sock->ops->compat_setsockopt(sock, level, 411 optname, optval, optlen); 412 else 413 err = sock->ops->setsockopt(sock, level, 414 optname, optval, optlen); 415 sockfd_put(sock); 416 } 417 return err; 418 } 419 420 static int do_get_sock_timeout(struct socket *sock, int level, int optname, 421 char __user *optval, int __user *optlen) 422 { 423 struct compat_timeval __user *up; 424 struct timeval ktime; 425 mm_segment_t old_fs; 426 int len, err; 427 428 up = (struct compat_timeval __user *) optval; 429 if (get_user(len, optlen)) 430 return -EFAULT; 431 if (len < sizeof(*up)) 432 return -EINVAL; 433 len = sizeof(ktime); 434 old_fs = get_fs(); 435 set_fs(KERNEL_DS); 436 err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len); 437 set_fs(old_fs); 438 439 if (!err) { 440 if (put_user(sizeof(*up), optlen) || 441 !access_ok(VERIFY_WRITE, up, sizeof(*up)) || 442 __put_user(ktime.tv_sec, &up->tv_sec) || 443 __put_user(ktime.tv_usec, &up->tv_usec)) 444 err = -EFAULT; 445 } 446 return err; 447 } 448 449 static int compat_sock_getsockopt(struct socket *sock, int level, int optname, 450 char __user *optval, int __user *optlen) 451 { 452 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) 453 return do_get_sock_timeout(sock, level, optname, optval, optlen); 454 return sock_getsockopt(sock, level, optname, optval, optlen); 455 } 456 457 int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp) 458 { 459 struct compat_timeval __user *ctv; 460 int err; 461 struct timeval tv; 462 463 if (COMPAT_USE_64BIT_TIME) 464 return sock_get_timestamp(sk, userstamp); 465 466 ctv = (struct compat_timeval __user *) userstamp; 467 err = -ENOENT; 468 if (!sock_flag(sk, SOCK_TIMESTAMP)) 469 sock_enable_timestamp(sk, SOCK_TIMESTAMP); 470 tv = ktime_to_timeval(sk->sk_stamp); 471 if (tv.tv_sec == -1) 472 return err; 473 if (tv.tv_sec == 0) { 474 sk->sk_stamp = ktime_get_real(); 475 tv = ktime_to_timeval(sk->sk_stamp); 476 } 477 err = 0; 478 if (put_user(tv.tv_sec, &ctv->tv_sec) || 479 put_user(tv.tv_usec, &ctv->tv_usec)) 480 err = -EFAULT; 481 return err; 482 } 483 EXPORT_SYMBOL(compat_sock_get_timestamp); 484 485 int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp) 486 { 487 struct compat_timespec __user *ctv; 488 int err; 489 struct timespec ts; 490 491 if (COMPAT_USE_64BIT_TIME) 492 return sock_get_timestampns (sk, userstamp); 493 494 ctv = (struct compat_timespec __user *) userstamp; 495 err = -ENOENT; 496 if (!sock_flag(sk, SOCK_TIMESTAMP)) 497 sock_enable_timestamp(sk, SOCK_TIMESTAMP); 498 ts = ktime_to_timespec(sk->sk_stamp); 499 if (ts.tv_sec == -1) 500 return err; 501 if (ts.tv_sec == 0) { 502 sk->sk_stamp = ktime_get_real(); 503 ts = ktime_to_timespec(sk->sk_stamp); 504 } 505 err = 0; 506 if (put_user(ts.tv_sec, &ctv->tv_sec) || 507 put_user(ts.tv_nsec, &ctv->tv_nsec)) 508 err = -EFAULT; 509 return err; 510 } 511 EXPORT_SYMBOL(compat_sock_get_timestampns); 512 513 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname, 514 char __user *optval, int __user *optlen) 515 { 516 int err; 517 struct socket *sock = sockfd_lookup(fd, &err); 518 519 if (sock) { 520 err = security_socket_getsockopt(sock, level, optname); 521 if (err) { 522 sockfd_put(sock); 523 return err; 524 } 525 526 if (level == SOL_SOCKET) 527 err = compat_sock_getsockopt(sock, level, 528 optname, optval, optlen); 529 else if (sock->ops->compat_getsockopt) 530 err = sock->ops->compat_getsockopt(sock, level, 531 optname, optval, optlen); 532 else 533 err = sock->ops->getsockopt(sock, level, 534 optname, optval, optlen); 535 sockfd_put(sock); 536 } 537 return err; 538 } 539 540 struct compat_group_req { 541 __u32 gr_interface; 542 struct __kernel_sockaddr_storage gr_group 543 __attribute__ ((aligned(4))); 544 } __packed; 545 546 struct compat_group_source_req { 547 __u32 gsr_interface; 548 struct __kernel_sockaddr_storage gsr_group 549 __attribute__ ((aligned(4))); 550 struct __kernel_sockaddr_storage gsr_source 551 __attribute__ ((aligned(4))); 552 } __packed; 553 554 struct compat_group_filter { 555 __u32 gf_interface; 556 struct __kernel_sockaddr_storage gf_group 557 __attribute__ ((aligned(4))); 558 __u32 gf_fmode; 559 __u32 gf_numsrc; 560 struct __kernel_sockaddr_storage gf_slist[1] 561 __attribute__ ((aligned(4))); 562 } __packed; 563 564 #define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \ 565 sizeof(struct __kernel_sockaddr_storage)) 566 567 568 int compat_mc_setsockopt(struct sock *sock, int level, int optname, 569 char __user *optval, unsigned int optlen, 570 int (*setsockopt)(struct sock *, int, int, char __user *, unsigned int)) 571 { 572 char __user *koptval = optval; 573 int koptlen = optlen; 574 575 switch (optname) { 576 case MCAST_JOIN_GROUP: 577 case MCAST_LEAVE_GROUP: 578 { 579 struct compat_group_req __user *gr32 = (void *)optval; 580 struct group_req __user *kgr = 581 compat_alloc_user_space(sizeof(struct group_req)); 582 u32 interface; 583 584 if (!access_ok(VERIFY_READ, gr32, sizeof(*gr32)) || 585 !access_ok(VERIFY_WRITE, kgr, sizeof(struct group_req)) || 586 __get_user(interface, &gr32->gr_interface) || 587 __put_user(interface, &kgr->gr_interface) || 588 copy_in_user(&kgr->gr_group, &gr32->gr_group, 589 sizeof(kgr->gr_group))) 590 return -EFAULT; 591 koptval = (char __user *)kgr; 592 koptlen = sizeof(struct group_req); 593 break; 594 } 595 case MCAST_JOIN_SOURCE_GROUP: 596 case MCAST_LEAVE_SOURCE_GROUP: 597 case MCAST_BLOCK_SOURCE: 598 case MCAST_UNBLOCK_SOURCE: 599 { 600 struct compat_group_source_req __user *gsr32 = (void *)optval; 601 struct group_source_req __user *kgsr = compat_alloc_user_space( 602 sizeof(struct group_source_req)); 603 u32 interface; 604 605 if (!access_ok(VERIFY_READ, gsr32, sizeof(*gsr32)) || 606 !access_ok(VERIFY_WRITE, kgsr, 607 sizeof(struct group_source_req)) || 608 __get_user(interface, &gsr32->gsr_interface) || 609 __put_user(interface, &kgsr->gsr_interface) || 610 copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group, 611 sizeof(kgsr->gsr_group)) || 612 copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source, 613 sizeof(kgsr->gsr_source))) 614 return -EFAULT; 615 koptval = (char __user *)kgsr; 616 koptlen = sizeof(struct group_source_req); 617 break; 618 } 619 case MCAST_MSFILTER: 620 { 621 struct compat_group_filter __user *gf32 = (void *)optval; 622 struct group_filter __user *kgf; 623 u32 interface, fmode, numsrc; 624 625 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || 626 __get_user(interface, &gf32->gf_interface) || 627 __get_user(fmode, &gf32->gf_fmode) || 628 __get_user(numsrc, &gf32->gf_numsrc)) 629 return -EFAULT; 630 koptlen = optlen + sizeof(struct group_filter) - 631 sizeof(struct compat_group_filter); 632 if (koptlen < GROUP_FILTER_SIZE(numsrc)) 633 return -EINVAL; 634 kgf = compat_alloc_user_space(koptlen); 635 if (!access_ok(VERIFY_WRITE, kgf, koptlen) || 636 __put_user(interface, &kgf->gf_interface) || 637 __put_user(fmode, &kgf->gf_fmode) || 638 __put_user(numsrc, &kgf->gf_numsrc) || 639 copy_in_user(&kgf->gf_group, &gf32->gf_group, 640 sizeof(kgf->gf_group)) || 641 (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist, 642 numsrc * sizeof(kgf->gf_slist[0])))) 643 return -EFAULT; 644 koptval = (char __user *)kgf; 645 break; 646 } 647 648 default: 649 break; 650 } 651 return setsockopt(sock, level, optname, koptval, koptlen); 652 } 653 EXPORT_SYMBOL(compat_mc_setsockopt); 654 655 int compat_mc_getsockopt(struct sock *sock, int level, int optname, 656 char __user *optval, int __user *optlen, 657 int (*getsockopt)(struct sock *, int, int, char __user *, int __user *)) 658 { 659 struct compat_group_filter __user *gf32 = (void *)optval; 660 struct group_filter __user *kgf; 661 int __user *koptlen; 662 u32 interface, fmode, numsrc; 663 int klen, ulen, err; 664 665 if (optname != MCAST_MSFILTER) 666 return getsockopt(sock, level, optname, optval, optlen); 667 668 koptlen = compat_alloc_user_space(sizeof(*koptlen)); 669 if (!access_ok(VERIFY_READ, optlen, sizeof(*optlen)) || 670 __get_user(ulen, optlen)) 671 return -EFAULT; 672 673 /* adjust len for pad */ 674 klen = ulen + sizeof(*kgf) - sizeof(*gf32); 675 676 if (klen < GROUP_FILTER_SIZE(0)) 677 return -EINVAL; 678 679 if (!access_ok(VERIFY_WRITE, koptlen, sizeof(*koptlen)) || 680 __put_user(klen, koptlen)) 681 return -EFAULT; 682 683 /* have to allow space for previous compat_alloc_user_space, too */ 684 kgf = compat_alloc_user_space(klen+sizeof(*optlen)); 685 686 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || 687 __get_user(interface, &gf32->gf_interface) || 688 __get_user(fmode, &gf32->gf_fmode) || 689 __get_user(numsrc, &gf32->gf_numsrc) || 690 __put_user(interface, &kgf->gf_interface) || 691 __put_user(fmode, &kgf->gf_fmode) || 692 __put_user(numsrc, &kgf->gf_numsrc) || 693 copy_in_user(&kgf->gf_group, &gf32->gf_group, sizeof(kgf->gf_group))) 694 return -EFAULT; 695 696 err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen); 697 if (err) 698 return err; 699 700 if (!access_ok(VERIFY_READ, koptlen, sizeof(*koptlen)) || 701 __get_user(klen, koptlen)) 702 return -EFAULT; 703 704 ulen = klen - (sizeof(*kgf)-sizeof(*gf32)); 705 706 if (!access_ok(VERIFY_WRITE, optlen, sizeof(*optlen)) || 707 __put_user(ulen, optlen)) 708 return -EFAULT; 709 710 if (!access_ok(VERIFY_READ, kgf, klen) || 711 !access_ok(VERIFY_WRITE, gf32, ulen) || 712 __get_user(interface, &kgf->gf_interface) || 713 __get_user(fmode, &kgf->gf_fmode) || 714 __get_user(numsrc, &kgf->gf_numsrc) || 715 __put_user(interface, &gf32->gf_interface) || 716 __put_user(fmode, &gf32->gf_fmode) || 717 __put_user(numsrc, &gf32->gf_numsrc)) 718 return -EFAULT; 719 if (numsrc) { 720 int copylen; 721 722 klen -= GROUP_FILTER_SIZE(0); 723 copylen = numsrc * sizeof(gf32->gf_slist[0]); 724 if (copylen > klen) 725 copylen = klen; 726 if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen)) 727 return -EFAULT; 728 } 729 return err; 730 } 731 EXPORT_SYMBOL(compat_mc_getsockopt); 732 733 734 /* Argument list sizes for compat_sys_socketcall */ 735 #define AL(x) ((x) * sizeof(u32)) 736 static unsigned char nas[21] = { 737 AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), 738 AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), 739 AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), 740 AL(4), AL(5), AL(4) 741 }; 742 #undef AL 743 744 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned flags) 745 { 746 return sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); 747 } 748 749 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, 750 unsigned vlen, unsigned int flags) 751 { 752 return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, 753 flags | MSG_CMSG_COMPAT); 754 } 755 756 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags) 757 { 758 return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); 759 } 760 761 asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len, unsigned flags) 762 { 763 return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT); 764 } 765 766 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, size_t len, 767 unsigned flags, struct sockaddr __user *addr, 768 int __user *addrlen) 769 { 770 return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen); 771 } 772 773 asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg, 774 unsigned vlen, unsigned int flags, 775 struct compat_timespec __user *timeout) 776 { 777 int datagrams; 778 struct timespec ktspec; 779 780 if (COMPAT_USE_64BIT_TIME) 781 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, 782 flags | MSG_CMSG_COMPAT, 783 (struct timespec *) timeout); 784 785 if (timeout == NULL) 786 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, 787 flags | MSG_CMSG_COMPAT, NULL); 788 789 if (get_compat_timespec(&ktspec, timeout)) 790 return -EFAULT; 791 792 datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, 793 flags | MSG_CMSG_COMPAT, &ktspec); 794 if (datagrams > 0 && put_compat_timespec(&ktspec, timeout)) 795 datagrams = -EFAULT; 796 797 return datagrams; 798 } 799 800 asmlinkage long compat_sys_socketcall(int call, u32 __user *args) 801 { 802 int ret; 803 u32 a[6]; 804 u32 a0, a1; 805 806 if (call < SYS_SOCKET || call > SYS_SENDMMSG) 807 return -EINVAL; 808 if (copy_from_user(a, args, nas[call])) 809 return -EFAULT; 810 a0 = a[0]; 811 a1 = a[1]; 812 813 switch (call) { 814 case SYS_SOCKET: 815 ret = sys_socket(a0, a1, a[2]); 816 break; 817 case SYS_BIND: 818 ret = sys_bind(a0, compat_ptr(a1), a[2]); 819 break; 820 case SYS_CONNECT: 821 ret = sys_connect(a0, compat_ptr(a1), a[2]); 822 break; 823 case SYS_LISTEN: 824 ret = sys_listen(a0, a1); 825 break; 826 case SYS_ACCEPT: 827 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0); 828 break; 829 case SYS_GETSOCKNAME: 830 ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2])); 831 break; 832 case SYS_GETPEERNAME: 833 ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2])); 834 break; 835 case SYS_SOCKETPAIR: 836 ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3])); 837 break; 838 case SYS_SEND: 839 ret = sys_send(a0, compat_ptr(a1), a[2], a[3]); 840 break; 841 case SYS_SENDTO: 842 ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]); 843 break; 844 case SYS_RECV: 845 ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]); 846 break; 847 case SYS_RECVFROM: 848 ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], 849 compat_ptr(a[4]), compat_ptr(a[5])); 850 break; 851 case SYS_SHUTDOWN: 852 ret = sys_shutdown(a0, a1); 853 break; 854 case SYS_SETSOCKOPT: 855 ret = compat_sys_setsockopt(a0, a1, a[2], 856 compat_ptr(a[3]), a[4]); 857 break; 858 case SYS_GETSOCKOPT: 859 ret = compat_sys_getsockopt(a0, a1, a[2], 860 compat_ptr(a[3]), compat_ptr(a[4])); 861 break; 862 case SYS_SENDMSG: 863 ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]); 864 break; 865 case SYS_SENDMMSG: 866 ret = compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]); 867 break; 868 case SYS_RECVMSG: 869 ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]); 870 break; 871 case SYS_RECVMMSG: 872 ret = compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3], 873 compat_ptr(a[4])); 874 break; 875 case SYS_ACCEPT4: 876 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]); 877 break; 878 default: 879 ret = -EINVAL; 880 break; 881 } 882 return ret; 883 } 884