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 26 #include <net/scm.h> 27 #include <net/sock.h> 28 #include <net/ip.h> 29 #include <net/ipv6.h> 30 #include <asm/uaccess.h> 31 #include <net/compat.h> 32 33 static inline int iov_from_user_compat_to_kern(struct iovec *kiov, 34 struct compat_iovec __user *uiov32, 35 int niov) 36 { 37 int tot_len = 0; 38 39 while (niov > 0) { 40 compat_uptr_t buf; 41 compat_size_t len; 42 43 if (get_user(len, &uiov32->iov_len) || 44 get_user(buf, &uiov32->iov_base)) { 45 tot_len = -EFAULT; 46 break; 47 } 48 tot_len += len; 49 kiov->iov_base = compat_ptr(buf); 50 kiov->iov_len = (__kernel_size_t) len; 51 uiov32++; 52 kiov++; 53 niov--; 54 } 55 return tot_len; 56 } 57 58 int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg) 59 { 60 compat_uptr_t tmp1, tmp2, tmp3; 61 62 if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) || 63 __get_user(tmp1, &umsg->msg_name) || 64 __get_user(kmsg->msg_namelen, &umsg->msg_namelen) || 65 __get_user(tmp2, &umsg->msg_iov) || 66 __get_user(kmsg->msg_iovlen, &umsg->msg_iovlen) || 67 __get_user(tmp3, &umsg->msg_control) || 68 __get_user(kmsg->msg_controllen, &umsg->msg_controllen) || 69 __get_user(kmsg->msg_flags, &umsg->msg_flags)) 70 return -EFAULT; 71 kmsg->msg_name = compat_ptr(tmp1); 72 kmsg->msg_iov = compat_ptr(tmp2); 73 kmsg->msg_control = compat_ptr(tmp3); 74 return 0; 75 } 76 77 /* I've named the args so it is easy to tell whose space the pointers are in. */ 78 int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov, 79 struct sockaddr *kern_address, int mode) 80 { 81 int tot_len; 82 83 if (kern_msg->msg_namelen) { 84 if (mode == VERIFY_READ) { 85 int err = move_addr_to_kernel(kern_msg->msg_name, 86 kern_msg->msg_namelen, 87 kern_address); 88 if (err < 0) 89 return err; 90 } 91 kern_msg->msg_name = kern_address; 92 } else 93 kern_msg->msg_name = NULL; 94 95 tot_len = iov_from_user_compat_to_kern(kern_iov, 96 (struct compat_iovec __user *)kern_msg->msg_iov, 97 kern_msg->msg_iovlen); 98 if (tot_len >= 0) 99 kern_msg->msg_iov = kern_iov; 100 101 return tot_len; 102 } 103 104 /* Bleech... */ 105 #define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32)) 106 107 #define CMSG_COMPAT_DATA(cmsg) \ 108 ((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)))) 109 #define CMSG_COMPAT_SPACE(len) \ 110 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len)) 111 #define CMSG_COMPAT_LEN(len) \ 112 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len)) 113 114 #define CMSG_COMPAT_FIRSTHDR(msg) \ 115 (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \ 116 (struct compat_cmsghdr __user *)((msg)->msg_control) : \ 117 (struct compat_cmsghdr __user *)NULL) 118 119 #define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \ 120 ((ucmlen) >= sizeof(struct compat_cmsghdr) && \ 121 (ucmlen) <= (unsigned long) \ 122 ((mhdr)->msg_controllen - \ 123 ((char *)(ucmsg) - (char *)(mhdr)->msg_control))) 124 125 static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg, 126 struct compat_cmsghdr __user *cmsg, int cmsg_len) 127 { 128 char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len); 129 if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) > 130 msg->msg_controllen) 131 return NULL; 132 return (struct compat_cmsghdr __user *)ptr; 133 } 134 135 /* There is a lot of hair here because the alignment rules (and 136 * thus placement) of cmsg headers and length are different for 137 * 32-bit apps. -DaveM 138 */ 139 int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk, 140 unsigned char *stackbuf, int stackbuf_size) 141 { 142 struct compat_cmsghdr __user *ucmsg; 143 struct cmsghdr *kcmsg, *kcmsg_base; 144 compat_size_t ucmlen; 145 __kernel_size_t kcmlen, tmp; 146 int err = -EFAULT; 147 148 kcmlen = 0; 149 kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf; 150 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); 151 while (ucmsg != NULL) { 152 if (get_user(ucmlen, &ucmsg->cmsg_len)) 153 return -EFAULT; 154 155 /* Catch bogons. */ 156 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) 157 return -EINVAL; 158 159 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + 160 CMSG_ALIGN(sizeof(struct cmsghdr))); 161 tmp = CMSG_ALIGN(tmp); 162 kcmlen += tmp; 163 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); 164 } 165 if (kcmlen == 0) 166 return -EINVAL; 167 168 /* The kcmlen holds the 64-bit version of the control length. 169 * It may not be modified as we do not stick it into the kmsg 170 * until we have successfully copied over all of the data 171 * from the user. 172 */ 173 if (kcmlen > stackbuf_size) 174 kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL); 175 if (kcmsg == NULL) 176 return -ENOBUFS; 177 178 /* Now copy them over neatly. */ 179 memset(kcmsg, 0, kcmlen); 180 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); 181 while (ucmsg != NULL) { 182 if (__get_user(ucmlen, &ucmsg->cmsg_len)) 183 goto Efault; 184 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) 185 goto Einval; 186 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + 187 CMSG_ALIGN(sizeof(struct cmsghdr))); 188 if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp)) 189 goto Einval; 190 kcmsg->cmsg_len = tmp; 191 tmp = CMSG_ALIGN(tmp); 192 if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) || 193 __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) || 194 copy_from_user(CMSG_DATA(kcmsg), 195 CMSG_COMPAT_DATA(ucmsg), 196 (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))))) 197 goto Efault; 198 199 /* Advance. */ 200 kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp); 201 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); 202 } 203 204 /* Ok, looks like we made it. Hook it up and return success. */ 205 kmsg->msg_control = kcmsg_base; 206 kmsg->msg_controllen = kcmlen; 207 return 0; 208 209 Einval: 210 err = -EINVAL; 211 Efault: 212 if (kcmsg_base != (struct cmsghdr *)stackbuf) 213 sock_kfree_s(sk, kcmsg_base, kcmlen); 214 return err; 215 } 216 217 int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data) 218 { 219 struct compat_timeval ctv; 220 struct compat_timespec cts[3]; 221 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; 222 struct compat_cmsghdr cmhdr; 223 int cmlen; 224 225 if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) { 226 kmsg->msg_flags |= MSG_CTRUNC; 227 return 0; /* XXX: return error? check spec. */ 228 } 229 230 if (level == SOL_SOCKET && type == SCM_TIMESTAMP) { 231 struct timeval *tv = (struct timeval *)data; 232 ctv.tv_sec = tv->tv_sec; 233 ctv.tv_usec = tv->tv_usec; 234 data = &ctv; 235 len = sizeof(ctv); 236 } 237 if (level == SOL_SOCKET && 238 (type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) { 239 int count = type == SCM_TIMESTAMPNS ? 1 : 3; 240 int i; 241 struct timespec *ts = (struct timespec *)data; 242 for (i = 0; i < count; i++) { 243 cts[i].tv_sec = ts[i].tv_sec; 244 cts[i].tv_nsec = ts[i].tv_nsec; 245 } 246 data = &cts; 247 len = sizeof(cts[0]) * count; 248 } 249 250 cmlen = CMSG_COMPAT_LEN(len); 251 if (kmsg->msg_controllen < cmlen) { 252 kmsg->msg_flags |= MSG_CTRUNC; 253 cmlen = kmsg->msg_controllen; 254 } 255 cmhdr.cmsg_level = level; 256 cmhdr.cmsg_type = type; 257 cmhdr.cmsg_len = cmlen; 258 259 if (copy_to_user(cm, &cmhdr, sizeof cmhdr)) 260 return -EFAULT; 261 if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr))) 262 return -EFAULT; 263 cmlen = CMSG_COMPAT_SPACE(len); 264 if (kmsg->msg_controllen < cmlen) 265 cmlen = kmsg->msg_controllen; 266 kmsg->msg_control += cmlen; 267 kmsg->msg_controllen -= cmlen; 268 return 0; 269 } 270 271 void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm) 272 { 273 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; 274 int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int); 275 int fdnum = scm->fp->count; 276 struct file **fp = scm->fp->fp; 277 int __user *cmfptr; 278 int err = 0, i; 279 280 if (fdnum < fdmax) 281 fdmax = fdnum; 282 283 for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) { 284 int new_fd; 285 err = security_file_receive(fp[i]); 286 if (err) 287 break; 288 err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags 289 ? O_CLOEXEC : 0); 290 if (err < 0) 291 break; 292 new_fd = err; 293 err = put_user(new_fd, cmfptr); 294 if (err) { 295 put_unused_fd(new_fd); 296 break; 297 } 298 /* Bump the usage count and install the file. */ 299 get_file(fp[i]); 300 fd_install(new_fd, fp[i]); 301 } 302 303 if (i > 0) { 304 int cmlen = CMSG_COMPAT_LEN(i * sizeof(int)); 305 err = put_user(SOL_SOCKET, &cm->cmsg_level); 306 if (!err) 307 err = put_user(SCM_RIGHTS, &cm->cmsg_type); 308 if (!err) 309 err = put_user(cmlen, &cm->cmsg_len); 310 if (!err) { 311 cmlen = CMSG_COMPAT_SPACE(i * sizeof(int)); 312 kmsg->msg_control += cmlen; 313 kmsg->msg_controllen -= cmlen; 314 } 315 } 316 if (i < fdnum) 317 kmsg->msg_flags |= MSG_CTRUNC; 318 319 /* 320 * All of the files that fit in the message have had their 321 * usage counts incremented, so we just free the list. 322 */ 323 __scm_destroy(scm); 324 } 325 326 /* 327 * A struct sock_filter is architecture independent. 328 */ 329 struct compat_sock_fprog { 330 u16 len; 331 compat_uptr_t filter; /* struct sock_filter * */ 332 }; 333 334 static int do_set_attach_filter(struct socket *sock, int level, int optname, 335 char __user *optval, unsigned int optlen) 336 { 337 struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval; 338 struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog)); 339 compat_uptr_t ptr; 340 u16 len; 341 342 if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) || 343 !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) || 344 __get_user(len, &fprog32->len) || 345 __get_user(ptr, &fprog32->filter) || 346 __put_user(len, &kfprog->len) || 347 __put_user(compat_ptr(ptr), &kfprog->filter)) 348 return -EFAULT; 349 350 return sock_setsockopt(sock, level, optname, (char __user *)kfprog, 351 sizeof(struct sock_fprog)); 352 } 353 354 static int do_set_sock_timeout(struct socket *sock, int level, 355 int optname, char __user *optval, unsigned int optlen) 356 { 357 struct compat_timeval __user *up = (struct compat_timeval __user *)optval; 358 struct timeval ktime; 359 mm_segment_t old_fs; 360 int err; 361 362 if (optlen < sizeof(*up)) 363 return -EINVAL; 364 if (!access_ok(VERIFY_READ, up, sizeof(*up)) || 365 __get_user(ktime.tv_sec, &up->tv_sec) || 366 __get_user(ktime.tv_usec, &up->tv_usec)) 367 return -EFAULT; 368 old_fs = get_fs(); 369 set_fs(KERNEL_DS); 370 err = sock_setsockopt(sock, level, optname, (char *)&ktime, sizeof(ktime)); 371 set_fs(old_fs); 372 373 return err; 374 } 375 376 static int compat_sock_setsockopt(struct socket *sock, int level, int optname, 377 char __user *optval, unsigned int optlen) 378 { 379 if (optname == SO_ATTACH_FILTER) 380 return do_set_attach_filter(sock, level, optname, 381 optval, optlen); 382 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) 383 return do_set_sock_timeout(sock, level, optname, optval, optlen); 384 385 return sock_setsockopt(sock, level, optname, optval, optlen); 386 } 387 388 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname, 389 char __user *optval, unsigned int optlen) 390 { 391 int err; 392 struct socket *sock = sockfd_lookup(fd, &err); 393 394 if (sock) { 395 err = security_socket_setsockopt(sock, level, optname); 396 if (err) { 397 sockfd_put(sock); 398 return err; 399 } 400 401 if (level == SOL_SOCKET) 402 err = compat_sock_setsockopt(sock, level, 403 optname, optval, optlen); 404 else if (sock->ops->compat_setsockopt) 405 err = sock->ops->compat_setsockopt(sock, level, 406 optname, optval, optlen); 407 else 408 err = sock->ops->setsockopt(sock, level, 409 optname, optval, optlen); 410 sockfd_put(sock); 411 } 412 return err; 413 } 414 415 static int do_get_sock_timeout(struct socket *sock, int level, int optname, 416 char __user *optval, int __user *optlen) 417 { 418 struct compat_timeval __user *up; 419 struct timeval ktime; 420 mm_segment_t old_fs; 421 int len, err; 422 423 up = (struct compat_timeval __user *) optval; 424 if (get_user(len, optlen)) 425 return -EFAULT; 426 if (len < sizeof(*up)) 427 return -EINVAL; 428 len = sizeof(ktime); 429 old_fs = get_fs(); 430 set_fs(KERNEL_DS); 431 err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len); 432 set_fs(old_fs); 433 434 if (!err) { 435 if (put_user(sizeof(*up), optlen) || 436 !access_ok(VERIFY_WRITE, up, sizeof(*up)) || 437 __put_user(ktime.tv_sec, &up->tv_sec) || 438 __put_user(ktime.tv_usec, &up->tv_usec)) 439 err = -EFAULT; 440 } 441 return err; 442 } 443 444 static int compat_sock_getsockopt(struct socket *sock, int level, int optname, 445 char __user *optval, int __user *optlen) 446 { 447 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) 448 return do_get_sock_timeout(sock, level, optname, optval, optlen); 449 return sock_getsockopt(sock, level, optname, optval, optlen); 450 } 451 452 int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp) 453 { 454 struct compat_timeval __user *ctv = 455 (struct compat_timeval __user *) userstamp; 456 int err = -ENOENT; 457 struct timeval tv; 458 459 if (!sock_flag(sk, SOCK_TIMESTAMP)) 460 sock_enable_timestamp(sk, SOCK_TIMESTAMP); 461 tv = ktime_to_timeval(sk->sk_stamp); 462 if (tv.tv_sec == -1) 463 return err; 464 if (tv.tv_sec == 0) { 465 sk->sk_stamp = ktime_get_real(); 466 tv = ktime_to_timeval(sk->sk_stamp); 467 } 468 err = 0; 469 if (put_user(tv.tv_sec, &ctv->tv_sec) || 470 put_user(tv.tv_usec, &ctv->tv_usec)) 471 err = -EFAULT; 472 return err; 473 } 474 EXPORT_SYMBOL(compat_sock_get_timestamp); 475 476 int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp) 477 { 478 struct compat_timespec __user *ctv = 479 (struct compat_timespec __user *) userstamp; 480 int err = -ENOENT; 481 struct timespec ts; 482 483 if (!sock_flag(sk, SOCK_TIMESTAMP)) 484 sock_enable_timestamp(sk, SOCK_TIMESTAMP); 485 ts = ktime_to_timespec(sk->sk_stamp); 486 if (ts.tv_sec == -1) 487 return err; 488 if (ts.tv_sec == 0) { 489 sk->sk_stamp = ktime_get_real(); 490 ts = ktime_to_timespec(sk->sk_stamp); 491 } 492 err = 0; 493 if (put_user(ts.tv_sec, &ctv->tv_sec) || 494 put_user(ts.tv_nsec, &ctv->tv_nsec)) 495 err = -EFAULT; 496 return err; 497 } 498 EXPORT_SYMBOL(compat_sock_get_timestampns); 499 500 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname, 501 char __user *optval, int __user *optlen) 502 { 503 int err; 504 struct socket *sock = sockfd_lookup(fd, &err); 505 506 if (sock) { 507 err = security_socket_getsockopt(sock, level, optname); 508 if (err) { 509 sockfd_put(sock); 510 return err; 511 } 512 513 if (level == SOL_SOCKET) 514 err = compat_sock_getsockopt(sock, level, 515 optname, optval, optlen); 516 else if (sock->ops->compat_getsockopt) 517 err = sock->ops->compat_getsockopt(sock, level, 518 optname, optval, optlen); 519 else 520 err = sock->ops->getsockopt(sock, level, 521 optname, optval, optlen); 522 sockfd_put(sock); 523 } 524 return err; 525 } 526 527 struct compat_group_req { 528 __u32 gr_interface; 529 struct __kernel_sockaddr_storage gr_group 530 __attribute__ ((aligned(4))); 531 } __packed; 532 533 struct compat_group_source_req { 534 __u32 gsr_interface; 535 struct __kernel_sockaddr_storage gsr_group 536 __attribute__ ((aligned(4))); 537 struct __kernel_sockaddr_storage gsr_source 538 __attribute__ ((aligned(4))); 539 } __packed; 540 541 struct compat_group_filter { 542 __u32 gf_interface; 543 struct __kernel_sockaddr_storage gf_group 544 __attribute__ ((aligned(4))); 545 __u32 gf_fmode; 546 __u32 gf_numsrc; 547 struct __kernel_sockaddr_storage gf_slist[1] 548 __attribute__ ((aligned(4))); 549 } __packed; 550 551 #define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \ 552 sizeof(struct __kernel_sockaddr_storage)) 553 554 555 int compat_mc_setsockopt(struct sock *sock, int level, int optname, 556 char __user *optval, unsigned int optlen, 557 int (*setsockopt)(struct sock *, int, int, char __user *, unsigned int)) 558 { 559 char __user *koptval = optval; 560 int koptlen = optlen; 561 562 switch (optname) { 563 case MCAST_JOIN_GROUP: 564 case MCAST_LEAVE_GROUP: 565 { 566 struct compat_group_req __user *gr32 = (void *)optval; 567 struct group_req __user *kgr = 568 compat_alloc_user_space(sizeof(struct group_req)); 569 u32 interface; 570 571 if (!access_ok(VERIFY_READ, gr32, sizeof(*gr32)) || 572 !access_ok(VERIFY_WRITE, kgr, sizeof(struct group_req)) || 573 __get_user(interface, &gr32->gr_interface) || 574 __put_user(interface, &kgr->gr_interface) || 575 copy_in_user(&kgr->gr_group, &gr32->gr_group, 576 sizeof(kgr->gr_group))) 577 return -EFAULT; 578 koptval = (char __user *)kgr; 579 koptlen = sizeof(struct group_req); 580 break; 581 } 582 case MCAST_JOIN_SOURCE_GROUP: 583 case MCAST_LEAVE_SOURCE_GROUP: 584 case MCAST_BLOCK_SOURCE: 585 case MCAST_UNBLOCK_SOURCE: 586 { 587 struct compat_group_source_req __user *gsr32 = (void *)optval; 588 struct group_source_req __user *kgsr = compat_alloc_user_space( 589 sizeof(struct group_source_req)); 590 u32 interface; 591 592 if (!access_ok(VERIFY_READ, gsr32, sizeof(*gsr32)) || 593 !access_ok(VERIFY_WRITE, kgsr, 594 sizeof(struct group_source_req)) || 595 __get_user(interface, &gsr32->gsr_interface) || 596 __put_user(interface, &kgsr->gsr_interface) || 597 copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group, 598 sizeof(kgsr->gsr_group)) || 599 copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source, 600 sizeof(kgsr->gsr_source))) 601 return -EFAULT; 602 koptval = (char __user *)kgsr; 603 koptlen = sizeof(struct group_source_req); 604 break; 605 } 606 case MCAST_MSFILTER: 607 { 608 struct compat_group_filter __user *gf32 = (void *)optval; 609 struct group_filter __user *kgf; 610 u32 interface, fmode, numsrc; 611 612 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || 613 __get_user(interface, &gf32->gf_interface) || 614 __get_user(fmode, &gf32->gf_fmode) || 615 __get_user(numsrc, &gf32->gf_numsrc)) 616 return -EFAULT; 617 koptlen = optlen + sizeof(struct group_filter) - 618 sizeof(struct compat_group_filter); 619 if (koptlen < GROUP_FILTER_SIZE(numsrc)) 620 return -EINVAL; 621 kgf = compat_alloc_user_space(koptlen); 622 if (!access_ok(VERIFY_WRITE, kgf, koptlen) || 623 __put_user(interface, &kgf->gf_interface) || 624 __put_user(fmode, &kgf->gf_fmode) || 625 __put_user(numsrc, &kgf->gf_numsrc) || 626 copy_in_user(&kgf->gf_group, &gf32->gf_group, 627 sizeof(kgf->gf_group)) || 628 (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist, 629 numsrc * sizeof(kgf->gf_slist[0])))) 630 return -EFAULT; 631 koptval = (char __user *)kgf; 632 break; 633 } 634 635 default: 636 break; 637 } 638 return setsockopt(sock, level, optname, koptval, koptlen); 639 } 640 EXPORT_SYMBOL(compat_mc_setsockopt); 641 642 int compat_mc_getsockopt(struct sock *sock, int level, int optname, 643 char __user *optval, int __user *optlen, 644 int (*getsockopt)(struct sock *, int, int, char __user *, int __user *)) 645 { 646 struct compat_group_filter __user *gf32 = (void *)optval; 647 struct group_filter __user *kgf; 648 int __user *koptlen; 649 u32 interface, fmode, numsrc; 650 int klen, ulen, err; 651 652 if (optname != MCAST_MSFILTER) 653 return getsockopt(sock, level, optname, optval, optlen); 654 655 koptlen = compat_alloc_user_space(sizeof(*koptlen)); 656 if (!access_ok(VERIFY_READ, optlen, sizeof(*optlen)) || 657 __get_user(ulen, optlen)) 658 return -EFAULT; 659 660 /* adjust len for pad */ 661 klen = ulen + sizeof(*kgf) - sizeof(*gf32); 662 663 if (klen < GROUP_FILTER_SIZE(0)) 664 return -EINVAL; 665 666 if (!access_ok(VERIFY_WRITE, koptlen, sizeof(*koptlen)) || 667 __put_user(klen, koptlen)) 668 return -EFAULT; 669 670 /* have to allow space for previous compat_alloc_user_space, too */ 671 kgf = compat_alloc_user_space(klen+sizeof(*optlen)); 672 673 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || 674 __get_user(interface, &gf32->gf_interface) || 675 __get_user(fmode, &gf32->gf_fmode) || 676 __get_user(numsrc, &gf32->gf_numsrc) || 677 __put_user(interface, &kgf->gf_interface) || 678 __put_user(fmode, &kgf->gf_fmode) || 679 __put_user(numsrc, &kgf->gf_numsrc) || 680 copy_in_user(&kgf->gf_group, &gf32->gf_group, sizeof(kgf->gf_group))) 681 return -EFAULT; 682 683 err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen); 684 if (err) 685 return err; 686 687 if (!access_ok(VERIFY_READ, koptlen, sizeof(*koptlen)) || 688 __get_user(klen, koptlen)) 689 return -EFAULT; 690 691 ulen = klen - (sizeof(*kgf)-sizeof(*gf32)); 692 693 if (!access_ok(VERIFY_WRITE, optlen, sizeof(*optlen)) || 694 __put_user(ulen, optlen)) 695 return -EFAULT; 696 697 if (!access_ok(VERIFY_READ, kgf, klen) || 698 !access_ok(VERIFY_WRITE, gf32, ulen) || 699 __get_user(interface, &kgf->gf_interface) || 700 __get_user(fmode, &kgf->gf_fmode) || 701 __get_user(numsrc, &kgf->gf_numsrc) || 702 __put_user(interface, &gf32->gf_interface) || 703 __put_user(fmode, &gf32->gf_fmode) || 704 __put_user(numsrc, &gf32->gf_numsrc)) 705 return -EFAULT; 706 if (numsrc) { 707 int copylen; 708 709 klen -= GROUP_FILTER_SIZE(0); 710 copylen = numsrc * sizeof(gf32->gf_slist[0]); 711 if (copylen > klen) 712 copylen = klen; 713 if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen)) 714 return -EFAULT; 715 } 716 return err; 717 } 718 EXPORT_SYMBOL(compat_mc_getsockopt); 719 720 721 /* Argument list sizes for compat_sys_socketcall */ 722 #define AL(x) ((x) * sizeof(u32)) 723 static unsigned char nas[20] = { 724 AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), 725 AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), 726 AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), 727 AL(4), AL(5) 728 }; 729 #undef AL 730 731 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned flags) 732 { 733 return sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); 734 } 735 736 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags) 737 { 738 return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); 739 } 740 741 asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len, unsigned flags) 742 { 743 return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT); 744 } 745 746 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, size_t len, 747 unsigned flags, struct sockaddr __user *addr, 748 int __user *addrlen) 749 { 750 return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen); 751 } 752 753 asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg, 754 unsigned vlen, unsigned int flags, 755 struct compat_timespec __user *timeout) 756 { 757 int datagrams; 758 struct timespec ktspec; 759 760 if (timeout == NULL) 761 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, 762 flags | MSG_CMSG_COMPAT, NULL); 763 764 if (get_compat_timespec(&ktspec, timeout)) 765 return -EFAULT; 766 767 datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, 768 flags | MSG_CMSG_COMPAT, &ktspec); 769 if (datagrams > 0 && put_compat_timespec(&ktspec, timeout)) 770 datagrams = -EFAULT; 771 772 return datagrams; 773 } 774 775 asmlinkage long compat_sys_socketcall(int call, u32 __user *args) 776 { 777 int ret; 778 u32 a[6]; 779 u32 a0, a1; 780 781 if (call < SYS_SOCKET || call > SYS_RECVMMSG) 782 return -EINVAL; 783 if (copy_from_user(a, args, nas[call])) 784 return -EFAULT; 785 a0 = a[0]; 786 a1 = a[1]; 787 788 switch (call) { 789 case SYS_SOCKET: 790 ret = sys_socket(a0, a1, a[2]); 791 break; 792 case SYS_BIND: 793 ret = sys_bind(a0, compat_ptr(a1), a[2]); 794 break; 795 case SYS_CONNECT: 796 ret = sys_connect(a0, compat_ptr(a1), a[2]); 797 break; 798 case SYS_LISTEN: 799 ret = sys_listen(a0, a1); 800 break; 801 case SYS_ACCEPT: 802 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0); 803 break; 804 case SYS_GETSOCKNAME: 805 ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2])); 806 break; 807 case SYS_GETPEERNAME: 808 ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2])); 809 break; 810 case SYS_SOCKETPAIR: 811 ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3])); 812 break; 813 case SYS_SEND: 814 ret = sys_send(a0, compat_ptr(a1), a[2], a[3]); 815 break; 816 case SYS_SENDTO: 817 ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]); 818 break; 819 case SYS_RECV: 820 ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]); 821 break; 822 case SYS_RECVFROM: 823 ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], 824 compat_ptr(a[4]), compat_ptr(a[5])); 825 break; 826 case SYS_SHUTDOWN: 827 ret = sys_shutdown(a0, a1); 828 break; 829 case SYS_SETSOCKOPT: 830 ret = compat_sys_setsockopt(a0, a1, a[2], 831 compat_ptr(a[3]), a[4]); 832 break; 833 case SYS_GETSOCKOPT: 834 ret = compat_sys_getsockopt(a0, a1, a[2], 835 compat_ptr(a[3]), compat_ptr(a[4])); 836 break; 837 case SYS_SENDMSG: 838 ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]); 839 break; 840 case SYS_RECVMSG: 841 ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]); 842 break; 843 case SYS_RECVMMSG: 844 ret = compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3], 845 compat_ptr(a[4])); 846 break; 847 case SYS_ACCEPT4: 848 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]); 849 break; 850 default: 851 ret = -EINVAL; 852 break; 853 } 854 return ret; 855 } 856