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 if (kmsg->msg_namelen > sizeof(struct sockaddr_storage)) 75 return -EINVAL; 76 kmsg->msg_name = compat_ptr(tmp1); 77 kmsg->msg_iov = compat_ptr(tmp2); 78 kmsg->msg_control = compat_ptr(tmp3); 79 return 0; 80 } 81 82 /* I've named the args so it is easy to tell whose space the pointers are in. */ 83 int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov, 84 struct sockaddr_storage *kern_address, int mode) 85 { 86 int tot_len; 87 88 if (kern_msg->msg_namelen) { 89 if (mode == VERIFY_READ) { 90 int err = move_addr_to_kernel(kern_msg->msg_name, 91 kern_msg->msg_namelen, 92 kern_address); 93 if (err < 0) 94 return err; 95 } 96 kern_msg->msg_name = kern_address; 97 } else 98 kern_msg->msg_name = NULL; 99 100 tot_len = iov_from_user_compat_to_kern(kern_iov, 101 (struct compat_iovec __user *)kern_msg->msg_iov, 102 kern_msg->msg_iovlen); 103 if (tot_len >= 0) 104 kern_msg->msg_iov = kern_iov; 105 106 return tot_len; 107 } 108 109 /* Bleech... */ 110 #define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32)) 111 112 #define CMSG_COMPAT_DATA(cmsg) \ 113 ((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)))) 114 #define CMSG_COMPAT_SPACE(len) \ 115 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len)) 116 #define CMSG_COMPAT_LEN(len) \ 117 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len)) 118 119 #define CMSG_COMPAT_FIRSTHDR(msg) \ 120 (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \ 121 (struct compat_cmsghdr __user *)((msg)->msg_control) : \ 122 (struct compat_cmsghdr __user *)NULL) 123 124 #define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \ 125 ((ucmlen) >= sizeof(struct compat_cmsghdr) && \ 126 (ucmlen) <= (unsigned long) \ 127 ((mhdr)->msg_controllen - \ 128 ((char *)(ucmsg) - (char *)(mhdr)->msg_control))) 129 130 static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg, 131 struct compat_cmsghdr __user *cmsg, int cmsg_len) 132 { 133 char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len); 134 if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) > 135 msg->msg_controllen) 136 return NULL; 137 return (struct compat_cmsghdr __user *)ptr; 138 } 139 140 /* There is a lot of hair here because the alignment rules (and 141 * thus placement) of cmsg headers and length are different for 142 * 32-bit apps. -DaveM 143 */ 144 int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk, 145 unsigned char *stackbuf, int stackbuf_size) 146 { 147 struct compat_cmsghdr __user *ucmsg; 148 struct cmsghdr *kcmsg, *kcmsg_base; 149 compat_size_t ucmlen; 150 __kernel_size_t kcmlen, tmp; 151 int err = -EFAULT; 152 153 kcmlen = 0; 154 kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf; 155 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); 156 while (ucmsg != NULL) { 157 if (get_user(ucmlen, &ucmsg->cmsg_len)) 158 return -EFAULT; 159 160 /* Catch bogons. */ 161 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) 162 return -EINVAL; 163 164 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + 165 CMSG_ALIGN(sizeof(struct cmsghdr))); 166 tmp = CMSG_ALIGN(tmp); 167 kcmlen += tmp; 168 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); 169 } 170 if (kcmlen == 0) 171 return -EINVAL; 172 173 /* The kcmlen holds the 64-bit version of the control length. 174 * It may not be modified as we do not stick it into the kmsg 175 * until we have successfully copied over all of the data 176 * from the user. 177 */ 178 if (kcmlen > stackbuf_size) 179 kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL); 180 if (kcmsg == NULL) 181 return -ENOBUFS; 182 183 /* Now copy them over neatly. */ 184 memset(kcmsg, 0, kcmlen); 185 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); 186 while (ucmsg != NULL) { 187 if (__get_user(ucmlen, &ucmsg->cmsg_len)) 188 goto Efault; 189 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) 190 goto Einval; 191 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + 192 CMSG_ALIGN(sizeof(struct cmsghdr))); 193 if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp)) 194 goto Einval; 195 kcmsg->cmsg_len = tmp; 196 tmp = CMSG_ALIGN(tmp); 197 if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) || 198 __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) || 199 copy_from_user(CMSG_DATA(kcmsg), 200 CMSG_COMPAT_DATA(ucmsg), 201 (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))))) 202 goto Efault; 203 204 /* Advance. */ 205 kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp); 206 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); 207 } 208 209 /* Ok, looks like we made it. Hook it up and return success. */ 210 kmsg->msg_control = kcmsg_base; 211 kmsg->msg_controllen = kcmlen; 212 return 0; 213 214 Einval: 215 err = -EINVAL; 216 Efault: 217 if (kcmsg_base != (struct cmsghdr *)stackbuf) 218 sock_kfree_s(sk, kcmsg_base, kcmlen); 219 return err; 220 } 221 222 int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data) 223 { 224 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; 225 struct compat_cmsghdr cmhdr; 226 struct compat_timeval ctv; 227 struct compat_timespec cts[3]; 228 int cmlen; 229 230 if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) { 231 kmsg->msg_flags |= MSG_CTRUNC; 232 return 0; /* XXX: return error? check spec. */ 233 } 234 235 if (!COMPAT_USE_64BIT_TIME) { 236 if (level == SOL_SOCKET && type == SCM_TIMESTAMP) { 237 struct timeval *tv = (struct timeval *)data; 238 ctv.tv_sec = tv->tv_sec; 239 ctv.tv_usec = tv->tv_usec; 240 data = &ctv; 241 len = sizeof(ctv); 242 } 243 if (level == SOL_SOCKET && 244 (type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) { 245 int count = type == SCM_TIMESTAMPNS ? 1 : 3; 246 int i; 247 struct timespec *ts = (struct timespec *)data; 248 for (i = 0; i < count; i++) { 249 cts[i].tv_sec = ts[i].tv_sec; 250 cts[i].tv_nsec = ts[i].tv_nsec; 251 } 252 data = &cts; 253 len = sizeof(cts[0]) * count; 254 } 255 } 256 257 cmlen = CMSG_COMPAT_LEN(len); 258 if (kmsg->msg_controllen < cmlen) { 259 kmsg->msg_flags |= MSG_CTRUNC; 260 cmlen = kmsg->msg_controllen; 261 } 262 cmhdr.cmsg_level = level; 263 cmhdr.cmsg_type = type; 264 cmhdr.cmsg_len = cmlen; 265 266 if (copy_to_user(cm, &cmhdr, sizeof cmhdr)) 267 return -EFAULT; 268 if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr))) 269 return -EFAULT; 270 cmlen = CMSG_COMPAT_SPACE(len); 271 if (kmsg->msg_controllen < cmlen) 272 cmlen = kmsg->msg_controllen; 273 kmsg->msg_control += cmlen; 274 kmsg->msg_controllen -= cmlen; 275 return 0; 276 } 277 278 void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm) 279 { 280 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; 281 int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int); 282 int fdnum = scm->fp->count; 283 struct file **fp = scm->fp->fp; 284 int __user *cmfptr; 285 int err = 0, i; 286 287 if (fdnum < fdmax) 288 fdmax = fdnum; 289 290 for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) { 291 int new_fd; 292 err = security_file_receive(fp[i]); 293 if (err) 294 break; 295 err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags 296 ? O_CLOEXEC : 0); 297 if (err < 0) 298 break; 299 new_fd = err; 300 err = put_user(new_fd, cmfptr); 301 if (err) { 302 put_unused_fd(new_fd); 303 break; 304 } 305 /* Bump the usage count and install the file. */ 306 fd_install(new_fd, get_file(fp[i])); 307 } 308 309 if (i > 0) { 310 int cmlen = CMSG_COMPAT_LEN(i * sizeof(int)); 311 err = put_user(SOL_SOCKET, &cm->cmsg_level); 312 if (!err) 313 err = put_user(SCM_RIGHTS, &cm->cmsg_type); 314 if (!err) 315 err = put_user(cmlen, &cm->cmsg_len); 316 if (!err) { 317 cmlen = CMSG_COMPAT_SPACE(i * sizeof(int)); 318 kmsg->msg_control += cmlen; 319 kmsg->msg_controllen -= cmlen; 320 } 321 } 322 if (i < fdnum) 323 kmsg->msg_flags |= MSG_CTRUNC; 324 325 /* 326 * All of the files that fit in the message have had their 327 * usage counts incremented, so we just free the list. 328 */ 329 __scm_destroy(scm); 330 } 331 332 static int do_set_attach_filter(struct socket *sock, int level, int optname, 333 char __user *optval, unsigned int optlen) 334 { 335 struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval; 336 struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog)); 337 compat_uptr_t ptr; 338 u16 len; 339 340 if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) || 341 !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) || 342 __get_user(len, &fprog32->len) || 343 __get_user(ptr, &fprog32->filter) || 344 __put_user(len, &kfprog->len) || 345 __put_user(compat_ptr(ptr), &kfprog->filter)) 346 return -EFAULT; 347 348 return sock_setsockopt(sock, level, optname, (char __user *)kfprog, 349 sizeof(struct sock_fprog)); 350 } 351 352 static int do_set_sock_timeout(struct socket *sock, int level, 353 int optname, char __user *optval, unsigned int optlen) 354 { 355 struct compat_timeval __user *up = (struct compat_timeval __user *)optval; 356 struct timeval ktime; 357 mm_segment_t old_fs; 358 int err; 359 360 if (optlen < sizeof(*up)) 361 return -EINVAL; 362 if (!access_ok(VERIFY_READ, up, sizeof(*up)) || 363 __get_user(ktime.tv_sec, &up->tv_sec) || 364 __get_user(ktime.tv_usec, &up->tv_usec)) 365 return -EFAULT; 366 old_fs = get_fs(); 367 set_fs(KERNEL_DS); 368 err = sock_setsockopt(sock, level, optname, (char *)&ktime, sizeof(ktime)); 369 set_fs(old_fs); 370 371 return err; 372 } 373 374 static int compat_sock_setsockopt(struct socket *sock, int level, int optname, 375 char __user *optval, unsigned int optlen) 376 { 377 if (optname == SO_ATTACH_FILTER) 378 return do_set_attach_filter(sock, level, optname, 379 optval, optlen); 380 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) 381 return do_set_sock_timeout(sock, level, optname, optval, optlen); 382 383 return sock_setsockopt(sock, level, optname, optval, optlen); 384 } 385 386 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname, 387 char __user *optval, unsigned int optlen) 388 { 389 int err; 390 struct socket *sock = sockfd_lookup(fd, &err); 391 392 if (sock) { 393 err = security_socket_setsockopt(sock, level, optname); 394 if (err) { 395 sockfd_put(sock); 396 return err; 397 } 398 399 if (level == SOL_SOCKET) 400 err = compat_sock_setsockopt(sock, level, 401 optname, optval, optlen); 402 else if (sock->ops->compat_setsockopt) 403 err = sock->ops->compat_setsockopt(sock, level, 404 optname, optval, optlen); 405 else 406 err = sock->ops->setsockopt(sock, level, 407 optname, optval, optlen); 408 sockfd_put(sock); 409 } 410 return err; 411 } 412 413 static int do_get_sock_timeout(struct socket *sock, int level, int optname, 414 char __user *optval, int __user *optlen) 415 { 416 struct compat_timeval __user *up; 417 struct timeval ktime; 418 mm_segment_t old_fs; 419 int len, err; 420 421 up = (struct compat_timeval __user *) optval; 422 if (get_user(len, optlen)) 423 return -EFAULT; 424 if (len < sizeof(*up)) 425 return -EINVAL; 426 len = sizeof(ktime); 427 old_fs = get_fs(); 428 set_fs(KERNEL_DS); 429 err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len); 430 set_fs(old_fs); 431 432 if (!err) { 433 if (put_user(sizeof(*up), optlen) || 434 !access_ok(VERIFY_WRITE, up, sizeof(*up)) || 435 __put_user(ktime.tv_sec, &up->tv_sec) || 436 __put_user(ktime.tv_usec, &up->tv_usec)) 437 err = -EFAULT; 438 } 439 return err; 440 } 441 442 static int compat_sock_getsockopt(struct socket *sock, int level, int optname, 443 char __user *optval, int __user *optlen) 444 { 445 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) 446 return do_get_sock_timeout(sock, level, optname, optval, optlen); 447 return sock_getsockopt(sock, level, optname, optval, optlen); 448 } 449 450 int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp) 451 { 452 struct compat_timeval __user *ctv; 453 int err; 454 struct timeval tv; 455 456 if (COMPAT_USE_64BIT_TIME) 457 return sock_get_timestamp(sk, userstamp); 458 459 ctv = (struct compat_timeval __user *) userstamp; 460 err = -ENOENT; 461 if (!sock_flag(sk, SOCK_TIMESTAMP)) 462 sock_enable_timestamp(sk, SOCK_TIMESTAMP); 463 tv = ktime_to_timeval(sk->sk_stamp); 464 if (tv.tv_sec == -1) 465 return err; 466 if (tv.tv_sec == 0) { 467 sk->sk_stamp = ktime_get_real(); 468 tv = ktime_to_timeval(sk->sk_stamp); 469 } 470 err = 0; 471 if (put_user(tv.tv_sec, &ctv->tv_sec) || 472 put_user(tv.tv_usec, &ctv->tv_usec)) 473 err = -EFAULT; 474 return err; 475 } 476 EXPORT_SYMBOL(compat_sock_get_timestamp); 477 478 int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp) 479 { 480 struct compat_timespec __user *ctv; 481 int err; 482 struct timespec ts; 483 484 if (COMPAT_USE_64BIT_TIME) 485 return sock_get_timestampns (sk, userstamp); 486 487 ctv = (struct compat_timespec __user *) userstamp; 488 err = -ENOENT; 489 if (!sock_flag(sk, SOCK_TIMESTAMP)) 490 sock_enable_timestamp(sk, SOCK_TIMESTAMP); 491 ts = ktime_to_timespec(sk->sk_stamp); 492 if (ts.tv_sec == -1) 493 return err; 494 if (ts.tv_sec == 0) { 495 sk->sk_stamp = ktime_get_real(); 496 ts = ktime_to_timespec(sk->sk_stamp); 497 } 498 err = 0; 499 if (put_user(ts.tv_sec, &ctv->tv_sec) || 500 put_user(ts.tv_nsec, &ctv->tv_nsec)) 501 err = -EFAULT; 502 return err; 503 } 504 EXPORT_SYMBOL(compat_sock_get_timestampns); 505 506 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname, 507 char __user *optval, int __user *optlen) 508 { 509 int err; 510 struct socket *sock = sockfd_lookup(fd, &err); 511 512 if (sock) { 513 err = security_socket_getsockopt(sock, level, optname); 514 if (err) { 515 sockfd_put(sock); 516 return err; 517 } 518 519 if (level == SOL_SOCKET) 520 err = compat_sock_getsockopt(sock, level, 521 optname, optval, optlen); 522 else if (sock->ops->compat_getsockopt) 523 err = sock->ops->compat_getsockopt(sock, level, 524 optname, optval, optlen); 525 else 526 err = sock->ops->getsockopt(sock, level, 527 optname, optval, optlen); 528 sockfd_put(sock); 529 } 530 return err; 531 } 532 533 struct compat_group_req { 534 __u32 gr_interface; 535 struct __kernel_sockaddr_storage gr_group 536 __attribute__ ((aligned(4))); 537 } __packed; 538 539 struct compat_group_source_req { 540 __u32 gsr_interface; 541 struct __kernel_sockaddr_storage gsr_group 542 __attribute__ ((aligned(4))); 543 struct __kernel_sockaddr_storage gsr_source 544 __attribute__ ((aligned(4))); 545 } __packed; 546 547 struct compat_group_filter { 548 __u32 gf_interface; 549 struct __kernel_sockaddr_storage gf_group 550 __attribute__ ((aligned(4))); 551 __u32 gf_fmode; 552 __u32 gf_numsrc; 553 struct __kernel_sockaddr_storage gf_slist[1] 554 __attribute__ ((aligned(4))); 555 } __packed; 556 557 #define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \ 558 sizeof(struct __kernel_sockaddr_storage)) 559 560 561 int compat_mc_setsockopt(struct sock *sock, int level, int optname, 562 char __user *optval, unsigned int optlen, 563 int (*setsockopt)(struct sock *, int, int, char __user *, unsigned int)) 564 { 565 char __user *koptval = optval; 566 int koptlen = optlen; 567 568 switch (optname) { 569 case MCAST_JOIN_GROUP: 570 case MCAST_LEAVE_GROUP: 571 { 572 struct compat_group_req __user *gr32 = (void *)optval; 573 struct group_req __user *kgr = 574 compat_alloc_user_space(sizeof(struct group_req)); 575 u32 interface; 576 577 if (!access_ok(VERIFY_READ, gr32, sizeof(*gr32)) || 578 !access_ok(VERIFY_WRITE, kgr, sizeof(struct group_req)) || 579 __get_user(interface, &gr32->gr_interface) || 580 __put_user(interface, &kgr->gr_interface) || 581 copy_in_user(&kgr->gr_group, &gr32->gr_group, 582 sizeof(kgr->gr_group))) 583 return -EFAULT; 584 koptval = (char __user *)kgr; 585 koptlen = sizeof(struct group_req); 586 break; 587 } 588 case MCAST_JOIN_SOURCE_GROUP: 589 case MCAST_LEAVE_SOURCE_GROUP: 590 case MCAST_BLOCK_SOURCE: 591 case MCAST_UNBLOCK_SOURCE: 592 { 593 struct compat_group_source_req __user *gsr32 = (void *)optval; 594 struct group_source_req __user *kgsr = compat_alloc_user_space( 595 sizeof(struct group_source_req)); 596 u32 interface; 597 598 if (!access_ok(VERIFY_READ, gsr32, sizeof(*gsr32)) || 599 !access_ok(VERIFY_WRITE, kgsr, 600 sizeof(struct group_source_req)) || 601 __get_user(interface, &gsr32->gsr_interface) || 602 __put_user(interface, &kgsr->gsr_interface) || 603 copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group, 604 sizeof(kgsr->gsr_group)) || 605 copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source, 606 sizeof(kgsr->gsr_source))) 607 return -EFAULT; 608 koptval = (char __user *)kgsr; 609 koptlen = sizeof(struct group_source_req); 610 break; 611 } 612 case MCAST_MSFILTER: 613 { 614 struct compat_group_filter __user *gf32 = (void *)optval; 615 struct group_filter __user *kgf; 616 u32 interface, fmode, numsrc; 617 618 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || 619 __get_user(interface, &gf32->gf_interface) || 620 __get_user(fmode, &gf32->gf_fmode) || 621 __get_user(numsrc, &gf32->gf_numsrc)) 622 return -EFAULT; 623 koptlen = optlen + sizeof(struct group_filter) - 624 sizeof(struct compat_group_filter); 625 if (koptlen < GROUP_FILTER_SIZE(numsrc)) 626 return -EINVAL; 627 kgf = compat_alloc_user_space(koptlen); 628 if (!access_ok(VERIFY_WRITE, kgf, koptlen) || 629 __put_user(interface, &kgf->gf_interface) || 630 __put_user(fmode, &kgf->gf_fmode) || 631 __put_user(numsrc, &kgf->gf_numsrc) || 632 copy_in_user(&kgf->gf_group, &gf32->gf_group, 633 sizeof(kgf->gf_group)) || 634 (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist, 635 numsrc * sizeof(kgf->gf_slist[0])))) 636 return -EFAULT; 637 koptval = (char __user *)kgf; 638 break; 639 } 640 641 default: 642 break; 643 } 644 return setsockopt(sock, level, optname, koptval, koptlen); 645 } 646 EXPORT_SYMBOL(compat_mc_setsockopt); 647 648 int compat_mc_getsockopt(struct sock *sock, int level, int optname, 649 char __user *optval, int __user *optlen, 650 int (*getsockopt)(struct sock *, int, int, char __user *, int __user *)) 651 { 652 struct compat_group_filter __user *gf32 = (void *)optval; 653 struct group_filter __user *kgf; 654 int __user *koptlen; 655 u32 interface, fmode, numsrc; 656 int klen, ulen, err; 657 658 if (optname != MCAST_MSFILTER) 659 return getsockopt(sock, level, optname, optval, optlen); 660 661 koptlen = compat_alloc_user_space(sizeof(*koptlen)); 662 if (!access_ok(VERIFY_READ, optlen, sizeof(*optlen)) || 663 __get_user(ulen, optlen)) 664 return -EFAULT; 665 666 /* adjust len for pad */ 667 klen = ulen + sizeof(*kgf) - sizeof(*gf32); 668 669 if (klen < GROUP_FILTER_SIZE(0)) 670 return -EINVAL; 671 672 if (!access_ok(VERIFY_WRITE, koptlen, sizeof(*koptlen)) || 673 __put_user(klen, koptlen)) 674 return -EFAULT; 675 676 /* have to allow space for previous compat_alloc_user_space, too */ 677 kgf = compat_alloc_user_space(klen+sizeof(*optlen)); 678 679 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || 680 __get_user(interface, &gf32->gf_interface) || 681 __get_user(fmode, &gf32->gf_fmode) || 682 __get_user(numsrc, &gf32->gf_numsrc) || 683 __put_user(interface, &kgf->gf_interface) || 684 __put_user(fmode, &kgf->gf_fmode) || 685 __put_user(numsrc, &kgf->gf_numsrc) || 686 copy_in_user(&kgf->gf_group, &gf32->gf_group, sizeof(kgf->gf_group))) 687 return -EFAULT; 688 689 err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen); 690 if (err) 691 return err; 692 693 if (!access_ok(VERIFY_READ, koptlen, sizeof(*koptlen)) || 694 __get_user(klen, koptlen)) 695 return -EFAULT; 696 697 ulen = klen - (sizeof(*kgf)-sizeof(*gf32)); 698 699 if (!access_ok(VERIFY_WRITE, optlen, sizeof(*optlen)) || 700 __put_user(ulen, optlen)) 701 return -EFAULT; 702 703 if (!access_ok(VERIFY_READ, kgf, klen) || 704 !access_ok(VERIFY_WRITE, gf32, ulen) || 705 __get_user(interface, &kgf->gf_interface) || 706 __get_user(fmode, &kgf->gf_fmode) || 707 __get_user(numsrc, &kgf->gf_numsrc) || 708 __put_user(interface, &gf32->gf_interface) || 709 __put_user(fmode, &gf32->gf_fmode) || 710 __put_user(numsrc, &gf32->gf_numsrc)) 711 return -EFAULT; 712 if (numsrc) { 713 int copylen; 714 715 klen -= GROUP_FILTER_SIZE(0); 716 copylen = numsrc * sizeof(gf32->gf_slist[0]); 717 if (copylen > klen) 718 copylen = klen; 719 if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen)) 720 return -EFAULT; 721 } 722 return err; 723 } 724 EXPORT_SYMBOL(compat_mc_getsockopt); 725 726 727 /* Argument list sizes for compat_sys_socketcall */ 728 #define AL(x) ((x) * sizeof(u32)) 729 static unsigned char nas[21] = { 730 AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), 731 AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), 732 AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), 733 AL(4), AL(5), AL(4) 734 }; 735 #undef AL 736 737 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags) 738 { 739 if (flags & MSG_CMSG_COMPAT) 740 return -EINVAL; 741 return __sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); 742 } 743 744 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, 745 unsigned int vlen, unsigned int flags) 746 { 747 if (flags & MSG_CMSG_COMPAT) 748 return -EINVAL; 749 return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, 750 flags | MSG_CMSG_COMPAT); 751 } 752 753 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags) 754 { 755 if (flags & MSG_CMSG_COMPAT) 756 return -EINVAL; 757 return __sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); 758 } 759 760 asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len, unsigned int flags) 761 { 762 return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT); 763 } 764 765 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, size_t len, 766 unsigned int flags, struct sockaddr __user *addr, 767 int __user *addrlen) 768 { 769 return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen); 770 } 771 772 asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg, 773 unsigned int vlen, unsigned int flags, 774 struct compat_timespec __user *timeout) 775 { 776 int datagrams; 777 struct timespec ktspec; 778 779 if (flags & MSG_CMSG_COMPAT) 780 return -EINVAL; 781 782 if (COMPAT_USE_64BIT_TIME) 783 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, 784 flags | MSG_CMSG_COMPAT, 785 (struct timespec *) timeout); 786 787 if (timeout == NULL) 788 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, 789 flags | MSG_CMSG_COMPAT, NULL); 790 791 if (get_compat_timespec(&ktspec, timeout)) 792 return -EFAULT; 793 794 datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, 795 flags | MSG_CMSG_COMPAT, &ktspec); 796 if (datagrams > 0 && put_compat_timespec(&ktspec, timeout)) 797 datagrams = -EFAULT; 798 799 return datagrams; 800 } 801 802 asmlinkage long compat_sys_socketcall(int call, u32 __user *args) 803 { 804 int ret; 805 u32 a[6]; 806 u32 a0, a1; 807 808 if (call < SYS_SOCKET || call > SYS_SENDMMSG) 809 return -EINVAL; 810 if (copy_from_user(a, args, nas[call])) 811 return -EFAULT; 812 a0 = a[0]; 813 a1 = a[1]; 814 815 switch (call) { 816 case SYS_SOCKET: 817 ret = sys_socket(a0, a1, a[2]); 818 break; 819 case SYS_BIND: 820 ret = sys_bind(a0, compat_ptr(a1), a[2]); 821 break; 822 case SYS_CONNECT: 823 ret = sys_connect(a0, compat_ptr(a1), a[2]); 824 break; 825 case SYS_LISTEN: 826 ret = sys_listen(a0, a1); 827 break; 828 case SYS_ACCEPT: 829 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0); 830 break; 831 case SYS_GETSOCKNAME: 832 ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2])); 833 break; 834 case SYS_GETPEERNAME: 835 ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2])); 836 break; 837 case SYS_SOCKETPAIR: 838 ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3])); 839 break; 840 case SYS_SEND: 841 ret = sys_send(a0, compat_ptr(a1), a[2], a[3]); 842 break; 843 case SYS_SENDTO: 844 ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]); 845 break; 846 case SYS_RECV: 847 ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]); 848 break; 849 case SYS_RECVFROM: 850 ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], 851 compat_ptr(a[4]), compat_ptr(a[5])); 852 break; 853 case SYS_SHUTDOWN: 854 ret = sys_shutdown(a0, a1); 855 break; 856 case SYS_SETSOCKOPT: 857 ret = compat_sys_setsockopt(a0, a1, a[2], 858 compat_ptr(a[3]), a[4]); 859 break; 860 case SYS_GETSOCKOPT: 861 ret = compat_sys_getsockopt(a0, a1, a[2], 862 compat_ptr(a[3]), compat_ptr(a[4])); 863 break; 864 case SYS_SENDMSG: 865 ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]); 866 break; 867 case SYS_SENDMMSG: 868 ret = compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]); 869 break; 870 case SYS_RECVMSG: 871 ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]); 872 break; 873 case SYS_RECVMMSG: 874 ret = compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3], 875 compat_ptr(a[4])); 876 break; 877 case SYS_ACCEPT4: 878 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]); 879 break; 880 default: 881 ret = -EINVAL; 882 break; 883 } 884 return ret; 885 } 886