1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * 32bit Socket syscall emulation. Based on arch/sparc64/kernel/sys_sparc32.c. 4 * 5 * Copyright (C) 2000 VA Linux Co 6 * Copyright (C) 2000 Don Dugger <[email protected]> 7 * Copyright (C) 1999 Arun Sharma <[email protected]> 8 * Copyright (C) 1997,1998 Jakub Jelinek ([email protected]) 9 * Copyright (C) 1997 David S. Miller ([email protected]) 10 * Copyright (C) 2000 Hewlett-Packard Co. 11 * Copyright (C) 2000 David Mosberger-Tang <[email protected]> 12 * Copyright (C) 2000,2001 Andi Kleen, SuSE Labs 13 */ 14 15 #include <linux/kernel.h> 16 #include <linux/gfp.h> 17 #include <linux/fs.h> 18 #include <linux/types.h> 19 #include <linux/file.h> 20 #include <linux/icmpv6.h> 21 #include <linux/socket.h> 22 #include <linux/syscalls.h> 23 #include <linux/filter.h> 24 #include <linux/compat.h> 25 #include <linux/security.h> 26 #include <linux/audit.h> 27 #include <linux/export.h> 28 29 #include <net/scm.h> 30 #include <net/sock.h> 31 #include <net/ip.h> 32 #include <net/ipv6.h> 33 #include <linux/uaccess.h> 34 #include <net/compat.h> 35 36 int __get_compat_msghdr(struct msghdr *kmsg, 37 struct compat_msghdr __user *umsg, 38 struct sockaddr __user **save_addr, 39 compat_uptr_t *ptr, compat_size_t *len) 40 { 41 struct compat_msghdr msg; 42 ssize_t err; 43 44 if (copy_from_user(&msg, umsg, sizeof(*umsg))) 45 return -EFAULT; 46 47 kmsg->msg_flags = msg.msg_flags; 48 kmsg->msg_namelen = msg.msg_namelen; 49 50 if (!msg.msg_name) 51 kmsg->msg_namelen = 0; 52 53 if (kmsg->msg_namelen < 0) 54 return -EINVAL; 55 56 if (kmsg->msg_namelen > sizeof(struct sockaddr_storage)) 57 kmsg->msg_namelen = sizeof(struct sockaddr_storage); 58 59 kmsg->msg_control_is_user = true; 60 kmsg->msg_control_user = compat_ptr(msg.msg_control); 61 kmsg->msg_controllen = msg.msg_controllen; 62 63 if (save_addr) 64 *save_addr = compat_ptr(msg.msg_name); 65 66 if (msg.msg_name && kmsg->msg_namelen) { 67 if (!save_addr) { 68 err = move_addr_to_kernel(compat_ptr(msg.msg_name), 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 (msg.msg_iovlen > UIO_MAXIOV) 80 return -EMSGSIZE; 81 82 kmsg->msg_iocb = NULL; 83 *ptr = msg.msg_iov; 84 *len = msg.msg_iovlen; 85 return 0; 86 } 87 88 int get_compat_msghdr(struct msghdr *kmsg, 89 struct compat_msghdr __user *umsg, 90 struct sockaddr __user **save_addr, 91 struct iovec **iov) 92 { 93 compat_uptr_t ptr; 94 compat_size_t len; 95 ssize_t err; 96 97 err = __get_compat_msghdr(kmsg, umsg, save_addr, &ptr, &len); 98 if (err) 99 return err; 100 101 err = compat_import_iovec(save_addr ? READ : WRITE, compat_ptr(ptr), 102 len, UIO_FASTIOV, iov, &kmsg->msg_iter); 103 return err < 0 ? err : 0; 104 } 105 106 /* Bleech... */ 107 #define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32)) 108 109 #define CMSG_COMPAT_DATA(cmsg) \ 110 ((void __user *)((char __user *)(cmsg) + sizeof(struct compat_cmsghdr))) 111 #define CMSG_COMPAT_SPACE(len) \ 112 (sizeof(struct compat_cmsghdr) + CMSG_COMPAT_ALIGN(len)) 113 #define CMSG_COMPAT_LEN(len) \ 114 (sizeof(struct compat_cmsghdr) + (len)) 115 116 #define CMSG_COMPAT_FIRSTHDR(msg) \ 117 (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \ 118 (struct compat_cmsghdr __user *)((msg)->msg_control) : \ 119 (struct compat_cmsghdr __user *)NULL) 120 121 #define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \ 122 ((ucmlen) >= sizeof(struct compat_cmsghdr) && \ 123 (ucmlen) <= (unsigned long) \ 124 ((mhdr)->msg_controllen - \ 125 ((char __user *)(ucmsg) - (char __user *)(mhdr)->msg_control_user))) 126 127 static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg, 128 struct compat_cmsghdr __user *cmsg, int cmsg_len) 129 { 130 char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len); 131 if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) > 132 msg->msg_controllen) 133 return NULL; 134 return (struct compat_cmsghdr __user *)ptr; 135 } 136 137 /* There is a lot of hair here because the alignment rules (and 138 * thus placement) of cmsg headers and length are different for 139 * 32-bit apps. -DaveM 140 */ 141 int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk, 142 unsigned char *stackbuf, int stackbuf_size) 143 { 144 struct compat_cmsghdr __user *ucmsg; 145 struct cmsghdr *kcmsg, *kcmsg_base; 146 compat_size_t ucmlen; 147 __kernel_size_t kcmlen, tmp; 148 int err = -EFAULT; 149 150 BUILD_BUG_ON(sizeof(struct compat_cmsghdr) != 151 CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr))); 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 - sizeof(*ucmsg)) + sizeof(struct cmsghdr)); 165 tmp = CMSG_ALIGN(tmp); 166 kcmlen += tmp; 167 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); 168 } 169 if (kcmlen == 0) 170 return -EINVAL; 171 172 /* The kcmlen holds the 64-bit version of the control length. 173 * It may not be modified as we do not stick it into the kmsg 174 * until we have successfully copied over all of the data 175 * from the user. 176 */ 177 if (kcmlen > stackbuf_size) 178 kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL); 179 if (kcmsg == NULL) 180 return -ENOBUFS; 181 182 /* Now copy them over neatly. */ 183 memset(kcmsg, 0, kcmlen); 184 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); 185 while (ucmsg != NULL) { 186 if (__get_user(ucmlen, &ucmsg->cmsg_len)) 187 goto Efault; 188 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) 189 goto Einval; 190 tmp = ((ucmlen - sizeof(*ucmsg)) + 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 - 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 /* 208 * check the length of messages copied in is the same as the 209 * what we get from the first loop 210 */ 211 if ((char *)kcmsg - (char *)kcmsg_base != kcmlen) 212 goto Einval; 213 214 /* Ok, looks like we made it. Hook it up and return success. */ 215 kmsg->msg_control = kcmsg_base; 216 kmsg->msg_controllen = kcmlen; 217 return 0; 218 219 Einval: 220 err = -EINVAL; 221 Efault: 222 if (kcmsg_base != (struct cmsghdr *)stackbuf) 223 sock_kfree_s(sk, kcmsg_base, kcmlen); 224 return err; 225 } 226 227 int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data) 228 { 229 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; 230 struct compat_cmsghdr cmhdr; 231 struct old_timeval32 ctv; 232 struct old_timespec32 cts[3]; 233 int cmlen; 234 235 if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) { 236 kmsg->msg_flags |= MSG_CTRUNC; 237 return 0; /* XXX: return error? check spec. */ 238 } 239 240 if (!COMPAT_USE_64BIT_TIME) { 241 if (level == SOL_SOCKET && type == SO_TIMESTAMP_OLD) { 242 struct __kernel_old_timeval *tv = (struct __kernel_old_timeval *)data; 243 ctv.tv_sec = tv->tv_sec; 244 ctv.tv_usec = tv->tv_usec; 245 data = &ctv; 246 len = sizeof(ctv); 247 } 248 if (level == SOL_SOCKET && 249 (type == SO_TIMESTAMPNS_OLD || type == SO_TIMESTAMPING_OLD)) { 250 int count = type == SO_TIMESTAMPNS_OLD ? 1 : 3; 251 int i; 252 struct __kernel_old_timespec *ts = data; 253 for (i = 0; i < count; i++) { 254 cts[i].tv_sec = ts[i].tv_sec; 255 cts[i].tv_nsec = ts[i].tv_nsec; 256 } 257 data = &cts; 258 len = sizeof(cts[0]) * count; 259 } 260 } 261 262 cmlen = CMSG_COMPAT_LEN(len); 263 if (kmsg->msg_controllen < cmlen) { 264 kmsg->msg_flags |= MSG_CTRUNC; 265 cmlen = kmsg->msg_controllen; 266 } 267 cmhdr.cmsg_level = level; 268 cmhdr.cmsg_type = type; 269 cmhdr.cmsg_len = cmlen; 270 271 if (copy_to_user(cm, &cmhdr, sizeof cmhdr)) 272 return -EFAULT; 273 if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr))) 274 return -EFAULT; 275 cmlen = CMSG_COMPAT_SPACE(len); 276 if (kmsg->msg_controllen < cmlen) 277 cmlen = kmsg->msg_controllen; 278 kmsg->msg_control += cmlen; 279 kmsg->msg_controllen -= cmlen; 280 return 0; 281 } 282 283 void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm) 284 { 285 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; 286 int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int); 287 int fdnum = scm->fp->count; 288 struct file **fp = scm->fp->fp; 289 int __user *cmfptr; 290 int err = 0, i; 291 292 if (fdnum < fdmax) 293 fdmax = fdnum; 294 295 for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) { 296 int new_fd; 297 err = security_file_receive(fp[i]); 298 if (err) 299 break; 300 err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags 301 ? O_CLOEXEC : 0); 302 if (err < 0) 303 break; 304 new_fd = err; 305 err = put_user(new_fd, cmfptr); 306 if (err) { 307 put_unused_fd(new_fd); 308 break; 309 } 310 /* Bump the usage count and install the file. */ 311 fd_install(new_fd, get_file(fp[i])); 312 } 313 314 if (i > 0) { 315 int cmlen = CMSG_COMPAT_LEN(i * sizeof(int)); 316 err = put_user(SOL_SOCKET, &cm->cmsg_level); 317 if (!err) 318 err = put_user(SCM_RIGHTS, &cm->cmsg_type); 319 if (!err) 320 err = put_user(cmlen, &cm->cmsg_len); 321 if (!err) { 322 cmlen = CMSG_COMPAT_SPACE(i * sizeof(int)); 323 kmsg->msg_control += cmlen; 324 kmsg->msg_controllen -= cmlen; 325 } 326 } 327 if (i < fdnum) 328 kmsg->msg_flags |= MSG_CTRUNC; 329 330 /* 331 * All of the files that fit in the message have had their 332 * usage counts incremented, so we just free the list. 333 */ 334 __scm_destroy(scm); 335 } 336 337 /* allocate a 64-bit sock_fprog on the user stack for duration of syscall. */ 338 struct sock_fprog __user *get_compat_bpf_fprog(char __user *optval) 339 { 340 struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval; 341 struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog)); 342 struct compat_sock_fprog f32; 343 struct sock_fprog f; 344 345 if (copy_from_user(&f32, fprog32, sizeof(*fprog32))) 346 return NULL; 347 memset(&f, 0, sizeof(f)); 348 f.len = f32.len; 349 f.filter = compat_ptr(f32.filter); 350 if (copy_to_user(kfprog, &f, sizeof(struct sock_fprog))) 351 return NULL; 352 353 return kfprog; 354 } 355 EXPORT_SYMBOL_GPL(get_compat_bpf_fprog); 356 357 static int do_set_attach_filter(struct socket *sock, int level, int optname, 358 char __user *optval, unsigned int optlen) 359 { 360 struct sock_fprog __user *kfprog; 361 362 kfprog = get_compat_bpf_fprog(optval); 363 if (!kfprog) 364 return -EFAULT; 365 366 return sock_setsockopt(sock, level, optname, (char __user *)kfprog, 367 sizeof(struct sock_fprog)); 368 } 369 370 static int compat_sock_setsockopt(struct socket *sock, int level, int optname, 371 char __user *optval, unsigned int optlen) 372 { 373 if (optname == SO_ATTACH_FILTER || 374 optname == SO_ATTACH_REUSEPORT_CBPF) 375 return do_set_attach_filter(sock, level, optname, 376 optval, optlen); 377 return sock_setsockopt(sock, level, optname, optval, optlen); 378 } 379 380 static int __compat_sys_setsockopt(int fd, int level, int optname, 381 char __user *optval, unsigned int optlen) 382 { 383 int err; 384 struct socket *sock; 385 386 if (optlen > INT_MAX) 387 return -EINVAL; 388 389 sock = sockfd_lookup(fd, &err); 390 if (sock) { 391 err = security_socket_setsockopt(sock, level, optname); 392 if (err) { 393 sockfd_put(sock); 394 return err; 395 } 396 397 if (level == SOL_SOCKET) 398 err = compat_sock_setsockopt(sock, level, 399 optname, optval, optlen); 400 else if (sock->ops->compat_setsockopt) 401 err = sock->ops->compat_setsockopt(sock, level, 402 optname, optval, optlen); 403 else 404 err = sock->ops->setsockopt(sock, level, 405 optname, optval, optlen); 406 sockfd_put(sock); 407 } 408 return err; 409 } 410 411 COMPAT_SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, 412 char __user *, optval, unsigned int, optlen) 413 { 414 return __compat_sys_setsockopt(fd, level, optname, optval, optlen); 415 } 416 417 static int __compat_sys_getsockopt(int fd, int level, int optname, 418 char __user *optval, 419 int __user *optlen) 420 { 421 int err; 422 struct socket *sock = sockfd_lookup(fd, &err); 423 424 if (sock) { 425 err = security_socket_getsockopt(sock, level, optname); 426 if (err) { 427 sockfd_put(sock); 428 return err; 429 } 430 431 if (level == SOL_SOCKET) 432 err = sock_getsockopt(sock, level, 433 optname, optval, optlen); 434 else if (sock->ops->compat_getsockopt) 435 err = sock->ops->compat_getsockopt(sock, level, 436 optname, optval, optlen); 437 else 438 err = sock->ops->getsockopt(sock, level, 439 optname, optval, optlen); 440 sockfd_put(sock); 441 } 442 return err; 443 } 444 445 COMPAT_SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, 446 char __user *, optval, int __user *, optlen) 447 { 448 return __compat_sys_getsockopt(fd, level, optname, optval, optlen); 449 } 450 451 /* Argument list sizes for compat_sys_socketcall */ 452 #define AL(x) ((x) * sizeof(u32)) 453 static unsigned char nas[21] = { 454 AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), 455 AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), 456 AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), 457 AL(4), AL(5), AL(4) 458 }; 459 #undef AL 460 461 static inline long __compat_sys_sendmsg(int fd, 462 struct compat_msghdr __user *msg, 463 unsigned int flags) 464 { 465 return __sys_sendmsg(fd, (struct user_msghdr __user *)msg, 466 flags | MSG_CMSG_COMPAT, false); 467 } 468 469 COMPAT_SYSCALL_DEFINE3(sendmsg, int, fd, struct compat_msghdr __user *, msg, 470 unsigned int, flags) 471 { 472 return __compat_sys_sendmsg(fd, msg, flags); 473 } 474 475 static inline long __compat_sys_sendmmsg(int fd, 476 struct compat_mmsghdr __user *mmsg, 477 unsigned int vlen, unsigned int flags) 478 { 479 return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, 480 flags | MSG_CMSG_COMPAT, false); 481 } 482 483 COMPAT_SYSCALL_DEFINE4(sendmmsg, int, fd, struct compat_mmsghdr __user *, mmsg, 484 unsigned int, vlen, unsigned int, flags) 485 { 486 return __compat_sys_sendmmsg(fd, mmsg, vlen, flags); 487 } 488 489 static inline long __compat_sys_recvmsg(int fd, 490 struct compat_msghdr __user *msg, 491 unsigned int flags) 492 { 493 return __sys_recvmsg(fd, (struct user_msghdr __user *)msg, 494 flags | MSG_CMSG_COMPAT, false); 495 } 496 497 COMPAT_SYSCALL_DEFINE3(recvmsg, int, fd, struct compat_msghdr __user *, msg, 498 unsigned int, flags) 499 { 500 return __compat_sys_recvmsg(fd, msg, flags); 501 } 502 503 static inline long __compat_sys_recvfrom(int fd, void __user *buf, 504 compat_size_t len, unsigned int flags, 505 struct sockaddr __user *addr, 506 int __user *addrlen) 507 { 508 return __sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, 509 addrlen); 510 } 511 512 COMPAT_SYSCALL_DEFINE4(recv, int, fd, void __user *, buf, compat_size_t, len, unsigned int, flags) 513 { 514 return __compat_sys_recvfrom(fd, buf, len, flags, NULL, NULL); 515 } 516 517 COMPAT_SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, buf, compat_size_t, len, 518 unsigned int, flags, struct sockaddr __user *, addr, 519 int __user *, addrlen) 520 { 521 return __compat_sys_recvfrom(fd, buf, len, flags, addr, addrlen); 522 } 523 524 COMPAT_SYSCALL_DEFINE5(recvmmsg_time64, int, fd, struct compat_mmsghdr __user *, mmsg, 525 unsigned int, vlen, unsigned int, flags, 526 struct __kernel_timespec __user *, timeout) 527 { 528 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, 529 flags | MSG_CMSG_COMPAT, timeout, NULL); 530 } 531 532 #ifdef CONFIG_COMPAT_32BIT_TIME 533 COMPAT_SYSCALL_DEFINE5(recvmmsg_time32, int, fd, struct compat_mmsghdr __user *, mmsg, 534 unsigned int, vlen, unsigned int, flags, 535 struct old_timespec32 __user *, timeout) 536 { 537 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, 538 flags | MSG_CMSG_COMPAT, NULL, timeout); 539 } 540 #endif 541 542 COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user *, args) 543 { 544 u32 a[AUDITSC_ARGS]; 545 unsigned int len; 546 u32 a0, a1; 547 int ret; 548 549 if (call < SYS_SOCKET || call > SYS_SENDMMSG) 550 return -EINVAL; 551 len = nas[call]; 552 if (len > sizeof(a)) 553 return -EINVAL; 554 555 if (copy_from_user(a, args, len)) 556 return -EFAULT; 557 558 ret = audit_socketcall_compat(len / sizeof(a[0]), a); 559 if (ret) 560 return ret; 561 562 a0 = a[0]; 563 a1 = a[1]; 564 565 switch (call) { 566 case SYS_SOCKET: 567 ret = __sys_socket(a0, a1, a[2]); 568 break; 569 case SYS_BIND: 570 ret = __sys_bind(a0, compat_ptr(a1), a[2]); 571 break; 572 case SYS_CONNECT: 573 ret = __sys_connect(a0, compat_ptr(a1), a[2]); 574 break; 575 case SYS_LISTEN: 576 ret = __sys_listen(a0, a1); 577 break; 578 case SYS_ACCEPT: 579 ret = __sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0); 580 break; 581 case SYS_GETSOCKNAME: 582 ret = __sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2])); 583 break; 584 case SYS_GETPEERNAME: 585 ret = __sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2])); 586 break; 587 case SYS_SOCKETPAIR: 588 ret = __sys_socketpair(a0, a1, a[2], compat_ptr(a[3])); 589 break; 590 case SYS_SEND: 591 ret = __sys_sendto(a0, compat_ptr(a1), a[2], a[3], NULL, 0); 592 break; 593 case SYS_SENDTO: 594 ret = __sys_sendto(a0, compat_ptr(a1), a[2], a[3], 595 compat_ptr(a[4]), a[5]); 596 break; 597 case SYS_RECV: 598 ret = __compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], 599 NULL, NULL); 600 break; 601 case SYS_RECVFROM: 602 ret = __compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], 603 compat_ptr(a[4]), 604 compat_ptr(a[5])); 605 break; 606 case SYS_SHUTDOWN: 607 ret = __sys_shutdown(a0, a1); 608 break; 609 case SYS_SETSOCKOPT: 610 ret = __compat_sys_setsockopt(a0, a1, a[2], 611 compat_ptr(a[3]), a[4]); 612 break; 613 case SYS_GETSOCKOPT: 614 ret = __compat_sys_getsockopt(a0, a1, a[2], 615 compat_ptr(a[3]), 616 compat_ptr(a[4])); 617 break; 618 case SYS_SENDMSG: 619 ret = __compat_sys_sendmsg(a0, compat_ptr(a1), a[2]); 620 break; 621 case SYS_SENDMMSG: 622 ret = __compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]); 623 break; 624 case SYS_RECVMSG: 625 ret = __compat_sys_recvmsg(a0, compat_ptr(a1), a[2]); 626 break; 627 case SYS_RECVMMSG: 628 ret = __sys_recvmmsg(a0, compat_ptr(a1), a[2], 629 a[3] | MSG_CMSG_COMPAT, NULL, 630 compat_ptr(a[4])); 631 break; 632 case SYS_ACCEPT4: 633 ret = __sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]); 634 break; 635 default: 636 ret = -EINVAL; 637 break; 638 } 639 return ret; 640 } 641