1 /* 2 * 32 bit compatibility code for System V IPC 3 * 4 * Copyright (C) 1997,1998 Jakub Jelinek ([email protected]) 5 * Copyright (C) 1997 David S. Miller ([email protected]) 6 * Copyright (C) 1999 Arun Sharma <[email protected]> 7 * Copyright (C) 2000 VA Linux Co 8 * Copyright (C) 2000 Don Dugger <[email protected]> 9 * Copyright (C) 2000 Hewlett-Packard Co. 10 * Copyright (C) 2000 David Mosberger-Tang <[email protected]> 11 * Copyright (C) 2000 Gerhard Tonn ([email protected]) 12 * Copyright (C) 2000-2002 Andi Kleen, SuSE Labs (x86-64 port) 13 * Copyright (C) 2000 Silicon Graphics, Inc. 14 * Copyright (C) 2001 IBM 15 * Copyright (C) 2004 IBM Deutschland Entwicklung GmbH, IBM Corporation 16 * Copyright (C) 2004 Arnd Bergmann ([email protected]) 17 * 18 * This code is collected from the versions for sparc64, mips64, s390x, ia64, 19 * ppc64 and x86_64, all of which are based on the original sparc64 version 20 * by Jakub Jelinek. 21 * 22 */ 23 #include <linux/compat.h> 24 #include <linux/errno.h> 25 #include <linux/highuid.h> 26 #include <linux/init.h> 27 #include <linux/msg.h> 28 #include <linux/shm.h> 29 #include <linux/syscalls.h> 30 #include <linux/ptrace.h> 31 32 #include <linux/mutex.h> 33 #include <asm/uaccess.h> 34 35 #include "util.h" 36 37 struct compat_msgbuf { 38 compat_long_t mtype; 39 char mtext[1]; 40 }; 41 42 struct compat_ipc_perm { 43 key_t key; 44 __compat_uid_t uid; 45 __compat_gid_t gid; 46 __compat_uid_t cuid; 47 __compat_gid_t cgid; 48 compat_mode_t mode; 49 unsigned short seq; 50 }; 51 52 struct compat_semid_ds { 53 struct compat_ipc_perm sem_perm; 54 compat_time_t sem_otime; 55 compat_time_t sem_ctime; 56 compat_uptr_t sem_base; 57 compat_uptr_t sem_pending; 58 compat_uptr_t sem_pending_last; 59 compat_uptr_t undo; 60 unsigned short sem_nsems; 61 }; 62 63 struct compat_msqid_ds { 64 struct compat_ipc_perm msg_perm; 65 compat_uptr_t msg_first; 66 compat_uptr_t msg_last; 67 compat_time_t msg_stime; 68 compat_time_t msg_rtime; 69 compat_time_t msg_ctime; 70 compat_ulong_t msg_lcbytes; 71 compat_ulong_t msg_lqbytes; 72 unsigned short msg_cbytes; 73 unsigned short msg_qnum; 74 unsigned short msg_qbytes; 75 compat_ipc_pid_t msg_lspid; 76 compat_ipc_pid_t msg_lrpid; 77 }; 78 79 struct compat_shmid_ds { 80 struct compat_ipc_perm shm_perm; 81 int shm_segsz; 82 compat_time_t shm_atime; 83 compat_time_t shm_dtime; 84 compat_time_t shm_ctime; 85 compat_ipc_pid_t shm_cpid; 86 compat_ipc_pid_t shm_lpid; 87 unsigned short shm_nattch; 88 unsigned short shm_unused; 89 compat_uptr_t shm_unused2; 90 compat_uptr_t shm_unused3; 91 }; 92 93 struct compat_ipc_kludge { 94 compat_uptr_t msgp; 95 compat_long_t msgtyp; 96 }; 97 98 struct compat_shminfo64 { 99 compat_ulong_t shmmax; 100 compat_ulong_t shmmin; 101 compat_ulong_t shmmni; 102 compat_ulong_t shmseg; 103 compat_ulong_t shmall; 104 compat_ulong_t __unused1; 105 compat_ulong_t __unused2; 106 compat_ulong_t __unused3; 107 compat_ulong_t __unused4; 108 }; 109 110 struct compat_shm_info { 111 compat_int_t used_ids; 112 compat_ulong_t shm_tot, shm_rss, shm_swp; 113 compat_ulong_t swap_attempts, swap_successes; 114 }; 115 116 extern int sem_ctls[]; 117 #define sc_semopm (sem_ctls[2]) 118 119 static inline int compat_ipc_parse_version(int *cmd) 120 { 121 #ifdef CONFIG_ARCH_WANT_COMPAT_IPC_PARSE_VERSION 122 int version = *cmd & IPC_64; 123 124 /* this is tricky: architectures that have support for the old 125 * ipc structures in 64 bit binaries need to have IPC_64 set 126 * in cmd, the others need to have it cleared */ 127 #ifndef ipc_parse_version 128 *cmd |= IPC_64; 129 #else 130 *cmd &= ~IPC_64; 131 #endif 132 return version; 133 #else 134 /* With the asm-generic APIs, we always use the 64-bit versions. */ 135 return IPC_64; 136 #endif 137 } 138 139 static inline int __get_compat_ipc64_perm(struct ipc64_perm *p64, 140 struct compat_ipc64_perm __user *up64) 141 { 142 int err; 143 144 err = __get_user(p64->uid, &up64->uid); 145 err |= __get_user(p64->gid, &up64->gid); 146 err |= __get_user(p64->mode, &up64->mode); 147 return err; 148 } 149 150 static inline int __get_compat_ipc_perm(struct ipc64_perm *p, 151 struct compat_ipc_perm __user *up) 152 { 153 int err; 154 155 err = __get_user(p->uid, &up->uid); 156 err |= __get_user(p->gid, &up->gid); 157 err |= __get_user(p->mode, &up->mode); 158 return err; 159 } 160 161 static inline int __put_compat_ipc64_perm(struct ipc64_perm *p64, 162 struct compat_ipc64_perm __user *up64) 163 { 164 int err; 165 166 err = __put_user(p64->key, &up64->key); 167 err |= __put_user(p64->uid, &up64->uid); 168 err |= __put_user(p64->gid, &up64->gid); 169 err |= __put_user(p64->cuid, &up64->cuid); 170 err |= __put_user(p64->cgid, &up64->cgid); 171 err |= __put_user(p64->mode, &up64->mode); 172 err |= __put_user(p64->seq, &up64->seq); 173 return err; 174 } 175 176 static inline int __put_compat_ipc_perm(struct ipc64_perm *p, 177 struct compat_ipc_perm __user *up) 178 { 179 int err; 180 __compat_uid_t u; 181 __compat_gid_t g; 182 183 err = __put_user(p->key, &up->key); 184 SET_UID(u, p->uid); 185 err |= __put_user(u, &up->uid); 186 SET_GID(g, p->gid); 187 err |= __put_user(g, &up->gid); 188 SET_UID(u, p->cuid); 189 err |= __put_user(u, &up->cuid); 190 SET_GID(g, p->cgid); 191 err |= __put_user(g, &up->cgid); 192 err |= __put_user(p->mode, &up->mode); 193 err |= __put_user(p->seq, &up->seq); 194 return err; 195 } 196 197 static inline int get_compat_semid64_ds(struct semid64_ds *s64, 198 struct compat_semid64_ds __user *up64) 199 { 200 if (!access_ok (VERIFY_READ, up64, sizeof(*up64))) 201 return -EFAULT; 202 return __get_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm); 203 } 204 205 static inline int get_compat_semid_ds(struct semid64_ds *s, 206 struct compat_semid_ds __user *up) 207 { 208 if (!access_ok (VERIFY_READ, up, sizeof(*up))) 209 return -EFAULT; 210 return __get_compat_ipc_perm(&s->sem_perm, &up->sem_perm); 211 } 212 213 static inline int put_compat_semid64_ds(struct semid64_ds *s64, 214 struct compat_semid64_ds __user *up64) 215 { 216 int err; 217 218 if (!access_ok (VERIFY_WRITE, up64, sizeof(*up64))) 219 return -EFAULT; 220 err = __put_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm); 221 err |= __put_user(s64->sem_otime, &up64->sem_otime); 222 err |= __put_user(s64->sem_ctime, &up64->sem_ctime); 223 err |= __put_user(s64->sem_nsems, &up64->sem_nsems); 224 return err; 225 } 226 227 static inline int put_compat_semid_ds(struct semid64_ds *s, 228 struct compat_semid_ds __user *up) 229 { 230 int err; 231 232 if (!access_ok (VERIFY_WRITE, up, sizeof(*up))) 233 return -EFAULT; 234 err = __put_compat_ipc_perm(&s->sem_perm, &up->sem_perm); 235 err |= __put_user(s->sem_otime, &up->sem_otime); 236 err |= __put_user(s->sem_ctime, &up->sem_ctime); 237 err |= __put_user(s->sem_nsems, &up->sem_nsems); 238 return err; 239 } 240 241 static long do_compat_semctl(int first, int second, int third, u32 pad) 242 { 243 union semun fourth; 244 int err, err2; 245 struct semid64_ds s64; 246 struct semid64_ds __user *up64; 247 int version = compat_ipc_parse_version(&third); 248 249 memset(&s64, 0, sizeof(s64)); 250 251 if ((third & (~IPC_64)) == SETVAL) 252 fourth.val = (int) pad; 253 else 254 fourth.__pad = compat_ptr(pad); 255 switch (third & (~IPC_64)) { 256 case IPC_INFO: 257 case IPC_RMID: 258 case SEM_INFO: 259 case GETVAL: 260 case GETPID: 261 case GETNCNT: 262 case GETZCNT: 263 case GETALL: 264 case SETVAL: 265 case SETALL: 266 err = sys_semctl(first, second, third, fourth); 267 break; 268 269 case IPC_STAT: 270 case SEM_STAT: 271 up64 = compat_alloc_user_space(sizeof(s64)); 272 fourth.__pad = up64; 273 err = sys_semctl(first, second, third, fourth); 274 if (err < 0) 275 break; 276 if (copy_from_user(&s64, up64, sizeof(s64))) 277 err2 = -EFAULT; 278 else if (version == IPC_64) 279 err2 = put_compat_semid64_ds(&s64, compat_ptr(pad)); 280 else 281 err2 = put_compat_semid_ds(&s64, compat_ptr(pad)); 282 if (err2) 283 err = -EFAULT; 284 break; 285 286 case IPC_SET: 287 if (version == IPC_64) { 288 err = get_compat_semid64_ds(&s64, compat_ptr(pad)); 289 } else { 290 err = get_compat_semid_ds(&s64, compat_ptr(pad)); 291 } 292 up64 = compat_alloc_user_space(sizeof(s64)); 293 if (copy_to_user(up64, &s64, sizeof(s64))) 294 err = -EFAULT; 295 if (err) 296 break; 297 298 fourth.__pad = up64; 299 err = sys_semctl(first, second, third, fourth); 300 break; 301 302 default: 303 err = -EINVAL; 304 break; 305 } 306 return err; 307 } 308 309 long compat_do_msg_fill(void __user *dest, struct msg_msg *msg, size_t bufsz) 310 { 311 struct compat_msgbuf __user *msgp = dest; 312 size_t msgsz; 313 314 if (put_user(msg->m_type, &msgp->mtype)) 315 return -EFAULT; 316 317 msgsz = (bufsz > msg->m_ts) ? msg->m_ts : bufsz; 318 if (store_msg(msgp->mtext, msg, msgsz)) 319 return -EFAULT; 320 return msgsz; 321 } 322 323 #ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC 324 long compat_sys_semctl(int first, int second, int third, void __user *uptr) 325 { 326 u32 pad; 327 328 if (!uptr) 329 return -EINVAL; 330 if (get_user(pad, (u32 __user *) uptr)) 331 return -EFAULT; 332 return do_compat_semctl(first, second, third, pad); 333 } 334 335 long compat_sys_msgsnd(int first, int second, int third, void __user *uptr) 336 { 337 struct compat_msgbuf __user *up = uptr; 338 long type; 339 340 if (first < 0) 341 return -EINVAL; 342 if (second < 0) 343 return -EINVAL; 344 345 if (get_user(type, &up->mtype)) 346 return -EFAULT; 347 348 return do_msgsnd(first, type, up->mtext, second, third); 349 } 350 351 long compat_sys_msgrcv(int first, int second, int msgtyp, int third, 352 int version, void __user *uptr) 353 { 354 if (first < 0) 355 return -EINVAL; 356 if (second < 0) 357 return -EINVAL; 358 359 if (!version) { 360 struct compat_ipc_kludge ipck; 361 if (!uptr) 362 return -EINVAL; 363 if (copy_from_user (&ipck, uptr, sizeof(ipck))) 364 return -EFAULT; 365 uptr = compat_ptr(ipck.msgp); 366 msgtyp = ipck.msgtyp; 367 } 368 return do_msgrcv(first, uptr, second, msgtyp, third, compat_do_msg_fill); 369 } 370 #else 371 long compat_sys_semctl(int semid, int semnum, int cmd, int arg) 372 { 373 return do_compat_semctl(semid, semnum, cmd, arg); 374 } 375 376 long compat_sys_msgsnd(int msqid, struct compat_msgbuf __user *msgp, 377 compat_ssize_t msgsz, int msgflg) 378 { 379 compat_long_t mtype; 380 381 if (get_user(mtype, &msgp->mtype)) 382 return -EFAULT; 383 return do_msgsnd(msqid, mtype, msgp->mtext, (ssize_t)msgsz, msgflg); 384 } 385 386 long compat_sys_msgrcv(int msqid, struct compat_msgbuf __user *msgp, 387 compat_ssize_t msgsz, long msgtyp, int msgflg) 388 { 389 return do_msgrcv(msqid, msgp, (ssize_t)msgsz, msgtyp, msgflg, 390 compat_do_msg_fill); 391 } 392 #endif 393 394 static inline int get_compat_msqid64(struct msqid64_ds *m64, 395 struct compat_msqid64_ds __user *up64) 396 { 397 int err; 398 399 if (!access_ok(VERIFY_READ, up64, sizeof(*up64))) 400 return -EFAULT; 401 err = __get_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm); 402 err |= __get_user(m64->msg_qbytes, &up64->msg_qbytes); 403 return err; 404 } 405 406 static inline int get_compat_msqid(struct msqid64_ds *m, 407 struct compat_msqid_ds __user *up) 408 { 409 int err; 410 411 if (!access_ok(VERIFY_READ, up, sizeof(*up))) 412 return -EFAULT; 413 err = __get_compat_ipc_perm(&m->msg_perm, &up->msg_perm); 414 err |= __get_user(m->msg_qbytes, &up->msg_qbytes); 415 return err; 416 } 417 418 static inline int put_compat_msqid64_ds(struct msqid64_ds *m64, 419 struct compat_msqid64_ds __user *up64) 420 { 421 int err; 422 423 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) 424 return -EFAULT; 425 err = __put_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm); 426 err |= __put_user(m64->msg_stime, &up64->msg_stime); 427 err |= __put_user(m64->msg_rtime, &up64->msg_rtime); 428 err |= __put_user(m64->msg_ctime, &up64->msg_ctime); 429 err |= __put_user(m64->msg_cbytes, &up64->msg_cbytes); 430 err |= __put_user(m64->msg_qnum, &up64->msg_qnum); 431 err |= __put_user(m64->msg_qbytes, &up64->msg_qbytes); 432 err |= __put_user(m64->msg_lspid, &up64->msg_lspid); 433 err |= __put_user(m64->msg_lrpid, &up64->msg_lrpid); 434 return err; 435 } 436 437 static inline int put_compat_msqid_ds(struct msqid64_ds *m, 438 struct compat_msqid_ds __user *up) 439 { 440 int err; 441 442 if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) 443 return -EFAULT; 444 err = __put_compat_ipc_perm(&m->msg_perm, &up->msg_perm); 445 err |= __put_user(m->msg_stime, &up->msg_stime); 446 err |= __put_user(m->msg_rtime, &up->msg_rtime); 447 err |= __put_user(m->msg_ctime, &up->msg_ctime); 448 err |= __put_user(m->msg_cbytes, &up->msg_cbytes); 449 err |= __put_user(m->msg_qnum, &up->msg_qnum); 450 err |= __put_user(m->msg_qbytes, &up->msg_qbytes); 451 err |= __put_user(m->msg_lspid, &up->msg_lspid); 452 err |= __put_user(m->msg_lrpid, &up->msg_lrpid); 453 return err; 454 } 455 456 long compat_sys_msgctl(int first, int second, void __user *uptr) 457 { 458 int err, err2; 459 struct msqid64_ds m64; 460 int version = compat_ipc_parse_version(&second); 461 void __user *p; 462 463 memset(&m64, 0, sizeof(m64)); 464 465 switch (second & (~IPC_64)) { 466 case IPC_INFO: 467 case IPC_RMID: 468 case MSG_INFO: 469 err = sys_msgctl(first, second, uptr); 470 break; 471 472 case IPC_SET: 473 if (version == IPC_64) { 474 err = get_compat_msqid64(&m64, uptr); 475 } else { 476 err = get_compat_msqid(&m64, uptr); 477 } 478 if (err) 479 break; 480 p = compat_alloc_user_space(sizeof(m64)); 481 if (copy_to_user(p, &m64, sizeof(m64))) 482 err = -EFAULT; 483 else 484 err = sys_msgctl(first, second, p); 485 break; 486 487 case IPC_STAT: 488 case MSG_STAT: 489 p = compat_alloc_user_space(sizeof(m64)); 490 err = sys_msgctl(first, second, p); 491 if (err < 0) 492 break; 493 if (copy_from_user(&m64, p, sizeof(m64))) 494 err2 = -EFAULT; 495 else if (version == IPC_64) 496 err2 = put_compat_msqid64_ds(&m64, uptr); 497 else 498 err2 = put_compat_msqid_ds(&m64, uptr); 499 if (err2) 500 err = -EFAULT; 501 break; 502 503 default: 504 err = -EINVAL; 505 break; 506 } 507 return err; 508 } 509 510 #ifndef COMPAT_SHMLBA 511 #define COMPAT_SHMLBA SHMLBA 512 #endif 513 514 #ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC 515 long compat_sys_shmat(int first, int second, compat_uptr_t third, int version, 516 void __user *uptr) 517 { 518 int err; 519 unsigned long raddr; 520 compat_ulong_t __user *uaddr; 521 522 if (version == 1) 523 return -EINVAL; 524 err = do_shmat(first, uptr, second, &raddr, COMPAT_SHMLBA); 525 if (err < 0) 526 return err; 527 uaddr = compat_ptr(third); 528 return put_user(raddr, uaddr); 529 } 530 #else 531 long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg) 532 { 533 unsigned long ret; 534 long err; 535 536 err = do_shmat(shmid, compat_ptr(shmaddr), shmflg, &ret, COMPAT_SHMLBA); 537 if (err) 538 return err; 539 force_successful_syscall_return(); 540 return (long)ret; 541 } 542 #endif 543 544 static inline int get_compat_shmid64_ds(struct shmid64_ds *s64, 545 struct compat_shmid64_ds __user *up64) 546 { 547 if (!access_ok(VERIFY_READ, up64, sizeof(*up64))) 548 return -EFAULT; 549 return __get_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm); 550 } 551 552 static inline int get_compat_shmid_ds(struct shmid64_ds *s, 553 struct compat_shmid_ds __user *up) 554 { 555 if (!access_ok(VERIFY_READ, up, sizeof(*up))) 556 return -EFAULT; 557 return __get_compat_ipc_perm(&s->shm_perm, &up->shm_perm); 558 } 559 560 static inline int put_compat_shmid64_ds(struct shmid64_ds *s64, 561 struct compat_shmid64_ds __user *up64) 562 { 563 int err; 564 565 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) 566 return -EFAULT; 567 err = __put_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm); 568 err |= __put_user(s64->shm_atime, &up64->shm_atime); 569 err |= __put_user(s64->shm_dtime, &up64->shm_dtime); 570 err |= __put_user(s64->shm_ctime, &up64->shm_ctime); 571 err |= __put_user(s64->shm_segsz, &up64->shm_segsz); 572 err |= __put_user(s64->shm_nattch, &up64->shm_nattch); 573 err |= __put_user(s64->shm_cpid, &up64->shm_cpid); 574 err |= __put_user(s64->shm_lpid, &up64->shm_lpid); 575 return err; 576 } 577 578 static inline int put_compat_shmid_ds(struct shmid64_ds *s, 579 struct compat_shmid_ds __user *up) 580 { 581 int err; 582 583 if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) 584 return -EFAULT; 585 err = __put_compat_ipc_perm(&s->shm_perm, &up->shm_perm); 586 err |= __put_user(s->shm_atime, &up->shm_atime); 587 err |= __put_user(s->shm_dtime, &up->shm_dtime); 588 err |= __put_user(s->shm_ctime, &up->shm_ctime); 589 err |= __put_user(s->shm_segsz, &up->shm_segsz); 590 err |= __put_user(s->shm_nattch, &up->shm_nattch); 591 err |= __put_user(s->shm_cpid, &up->shm_cpid); 592 err |= __put_user(s->shm_lpid, &up->shm_lpid); 593 return err; 594 } 595 596 static inline int put_compat_shminfo64(struct shminfo64 *smi, 597 struct compat_shminfo64 __user *up64) 598 { 599 int err; 600 601 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) 602 return -EFAULT; 603 if (smi->shmmax > INT_MAX) 604 smi->shmmax = INT_MAX; 605 err = __put_user(smi->shmmax, &up64->shmmax); 606 err |= __put_user(smi->shmmin, &up64->shmmin); 607 err |= __put_user(smi->shmmni, &up64->shmmni); 608 err |= __put_user(smi->shmseg, &up64->shmseg); 609 err |= __put_user(smi->shmall, &up64->shmall); 610 return err; 611 } 612 613 static inline int put_compat_shminfo(struct shminfo64 *smi, 614 struct shminfo __user *up) 615 { 616 int err; 617 618 if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) 619 return -EFAULT; 620 if (smi->shmmax > INT_MAX) 621 smi->shmmax = INT_MAX; 622 err = __put_user(smi->shmmax, &up->shmmax); 623 err |= __put_user(smi->shmmin, &up->shmmin); 624 err |= __put_user(smi->shmmni, &up->shmmni); 625 err |= __put_user(smi->shmseg, &up->shmseg); 626 err |= __put_user(smi->shmall, &up->shmall); 627 return err; 628 } 629 630 static inline int put_compat_shm_info(struct shm_info __user *ip, 631 struct compat_shm_info __user *uip) 632 { 633 int err; 634 struct shm_info si; 635 636 if (!access_ok(VERIFY_WRITE, uip, sizeof(*uip)) || 637 copy_from_user(&si, ip, sizeof(si))) 638 return -EFAULT; 639 err = __put_user(si.used_ids, &uip->used_ids); 640 err |= __put_user(si.shm_tot, &uip->shm_tot); 641 err |= __put_user(si.shm_rss, &uip->shm_rss); 642 err |= __put_user(si.shm_swp, &uip->shm_swp); 643 err |= __put_user(si.swap_attempts, &uip->swap_attempts); 644 err |= __put_user(si.swap_successes, &uip->swap_successes); 645 return err; 646 } 647 648 long compat_sys_shmctl(int first, int second, void __user *uptr) 649 { 650 void __user *p; 651 struct shmid64_ds s64; 652 struct shminfo64 smi; 653 int err, err2; 654 int version = compat_ipc_parse_version(&second); 655 656 memset(&s64, 0, sizeof(s64)); 657 658 switch (second & (~IPC_64)) { 659 case IPC_RMID: 660 case SHM_LOCK: 661 case SHM_UNLOCK: 662 err = sys_shmctl(first, second, uptr); 663 break; 664 665 case IPC_INFO: 666 p = compat_alloc_user_space(sizeof(smi)); 667 err = sys_shmctl(first, second, p); 668 if (err < 0) 669 break; 670 if (copy_from_user(&smi, p, sizeof(smi))) 671 err2 = -EFAULT; 672 else if (version == IPC_64) 673 err2 = put_compat_shminfo64(&smi, uptr); 674 else 675 err2 = put_compat_shminfo(&smi, uptr); 676 if (err2) 677 err = -EFAULT; 678 break; 679 680 681 case IPC_SET: 682 if (version == IPC_64) { 683 err = get_compat_shmid64_ds(&s64, uptr); 684 } else { 685 err = get_compat_shmid_ds(&s64, uptr); 686 } 687 if (err) 688 break; 689 p = compat_alloc_user_space(sizeof(s64)); 690 if (copy_to_user(p, &s64, sizeof(s64))) 691 err = -EFAULT; 692 else 693 err = sys_shmctl(first, second, p); 694 break; 695 696 case IPC_STAT: 697 case SHM_STAT: 698 p = compat_alloc_user_space(sizeof(s64)); 699 err = sys_shmctl(first, second, p); 700 if (err < 0) 701 break; 702 if (copy_from_user(&s64, p, sizeof(s64))) 703 err2 = -EFAULT; 704 else if (version == IPC_64) 705 err2 = put_compat_shmid64_ds(&s64, uptr); 706 else 707 err2 = put_compat_shmid_ds(&s64, uptr); 708 if (err2) 709 err = -EFAULT; 710 break; 711 712 case SHM_INFO: 713 p = compat_alloc_user_space(sizeof(struct shm_info)); 714 err = sys_shmctl(first, second, p); 715 if (err < 0) 716 break; 717 err2 = put_compat_shm_info(p, uptr); 718 if (err2) 719 err = -EFAULT; 720 break; 721 722 default: 723 err = -EINVAL; 724 break; 725 } 726 return err; 727 } 728 729 long compat_sys_semtimedop(int semid, struct sembuf __user *tsems, 730 unsigned nsops, const struct compat_timespec __user *timeout) 731 { 732 struct timespec __user *ts64 = NULL; 733 if (timeout) { 734 struct timespec ts; 735 ts64 = compat_alloc_user_space(sizeof(*ts64)); 736 if (get_compat_timespec(&ts, timeout)) 737 return -EFAULT; 738 if (copy_to_user(ts64, &ts, sizeof(ts))) 739 return -EFAULT; 740 } 741 return sys_semtimedop(semid, tsems, nsops, ts64); 742 } 743