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FreeBSD/Linux Kernel Cross Reference
sys/ipc/compat.c
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1 /* 2 * 32 bit compatibility code for System V IPC 3 * 4 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) 5 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu) 6 * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com> 7 * Copyright (C) 2000 VA Linux Co 8 * Copyright (C) 2000 Don Dugger <n0ano@valinux.com> 9 * Copyright (C) 2000 Hewlett-Packard Co. 10 * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com> 11 * Copyright (C) 2000 Gerhard Tonn (ton@de.ibm.com) 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 (arnd@arndb.de) 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, 369 compat_do_msg_fill); 370 } 371 #else 372 long compat_sys_semctl(int semid, int semnum, int cmd, int arg) 373 { 374 return do_compat_semctl(semid, semnum, cmd, arg); 375 } 376 377 long compat_sys_msgsnd(int msqid, struct compat_msgbuf __user *msgp, 378 compat_ssize_t msgsz, int msgflg) 379 { 380 compat_long_t mtype; 381 382 if (get_user(mtype, &msgp->mtype)) 383 return -EFAULT; 384 return do_msgsnd(msqid, mtype, msgp->mtext, (ssize_t)msgsz, msgflg); 385 } 386 387 long compat_sys_msgrcv(int msqid, struct compat_msgbuf __user *msgp, 388 compat_ssize_t msgsz, long msgtyp, int msgflg) 389 { 390 return do_msgrcv(msqid, msgp, (ssize_t)msgsz, msgtyp, msgflg, 391 compat_do_msg_fill); 392 } 393 #endif 394 395 static inline int get_compat_msqid64(struct msqid64_ds *m64, 396 struct compat_msqid64_ds __user *up64) 397 { 398 int err; 399 400 if (!access_ok(VERIFY_READ, up64, sizeof(*up64))) 401 return -EFAULT; 402 err = __get_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm); 403 err |= __get_user(m64->msg_qbytes, &up64->msg_qbytes); 404 return err; 405 } 406 407 static inline int get_compat_msqid(struct msqid64_ds *m, 408 struct compat_msqid_ds __user *up) 409 { 410 int err; 411 412 if (!access_ok(VERIFY_READ, up, sizeof(*up))) 413 return -EFAULT; 414 err = __get_compat_ipc_perm(&m->msg_perm, &up->msg_perm); 415 err |= __get_user(m->msg_qbytes, &up->msg_qbytes); 416 return err; 417 } 418 419 static inline int put_compat_msqid64_ds(struct msqid64_ds *m64, 420 struct compat_msqid64_ds __user *up64) 421 { 422 int err; 423 424 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) 425 return -EFAULT; 426 err = __put_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm); 427 err |= __put_user(m64->msg_stime, &up64->msg_stime); 428 err |= __put_user(m64->msg_rtime, &up64->msg_rtime); 429 err |= __put_user(m64->msg_ctime, &up64->msg_ctime); 430 err |= __put_user(m64->msg_cbytes, &up64->msg_cbytes); 431 err |= __put_user(m64->msg_qnum, &up64->msg_qnum); 432 err |= __put_user(m64->msg_qbytes, &up64->msg_qbytes); 433 err |= __put_user(m64->msg_lspid, &up64->msg_lspid); 434 err |= __put_user(m64->msg_lrpid, &up64->msg_lrpid); 435 return err; 436 } 437 438 static inline int put_compat_msqid_ds(struct msqid64_ds *m, 439 struct compat_msqid_ds __user *up) 440 { 441 int err; 442 443 if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) 444 return -EFAULT; 445 err = __put_compat_ipc_perm(&m->msg_perm, &up->msg_perm); 446 err |= __put_user(m->msg_stime, &up->msg_stime); 447 err |= __put_user(m->msg_rtime, &up->msg_rtime); 448 err |= __put_user(m->msg_ctime, &up->msg_ctime); 449 err |= __put_user(m->msg_cbytes, &up->msg_cbytes); 450 err |= __put_user(m->msg_qnum, &up->msg_qnum); 451 err |= __put_user(m->msg_qbytes, &up->msg_qbytes); 452 err |= __put_user(m->msg_lspid, &up->msg_lspid); 453 err |= __put_user(m->msg_lrpid, &up->msg_lrpid); 454 return err; 455 } 456 457 long compat_sys_msgctl(int first, int second, void __user *uptr) 458 { 459 int err, err2; 460 struct msqid64_ds m64; 461 int version = compat_ipc_parse_version(&second); 462 void __user *p; 463 464 memset(&m64, 0, sizeof(m64)); 465 466 switch (second & (~IPC_64)) { 467 case IPC_INFO: 468 case IPC_RMID: 469 case MSG_INFO: 470 err = sys_msgctl(first, second, uptr); 471 break; 472 473 case IPC_SET: 474 if (version == IPC_64) { 475 err = get_compat_msqid64(&m64, uptr); 476 } else { 477 err = get_compat_msqid(&m64, uptr); 478 } 479 if (err) 480 break; 481 p = compat_alloc_user_space(sizeof(m64)); 482 if (copy_to_user(p, &m64, sizeof(m64))) 483 err = -EFAULT; 484 else 485 err = sys_msgctl(first, second, p); 486 break; 487 488 case IPC_STAT: 489 case MSG_STAT: 490 p = compat_alloc_user_space(sizeof(m64)); 491 err = sys_msgctl(first, second, p); 492 if (err < 0) 493 break; 494 if (copy_from_user(&m64, p, sizeof(m64))) 495 err2 = -EFAULT; 496 else if (version == IPC_64) 497 err2 = put_compat_msqid64_ds(&m64, uptr); 498 else 499 err2 = put_compat_msqid_ds(&m64, uptr); 500 if (err2) 501 err = -EFAULT; 502 break; 503 504 default: 505 err = -EINVAL; 506 break; 507 } 508 return err; 509 } 510 511 #ifndef COMPAT_SHMLBA 512 #define COMPAT_SHMLBA SHMLBA 513 #endif 514 515 #ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC 516 long compat_sys_shmat(int first, int second, compat_uptr_t third, int version, 517 void __user *uptr) 518 { 519 int err; 520 unsigned long raddr; 521 compat_ulong_t __user *uaddr; 522 523 if (version == 1) 524 return -EINVAL; 525 err = do_shmat(first, uptr, second, &raddr, COMPAT_SHMLBA); 526 if (err < 0) 527 return err; 528 uaddr = compat_ptr(third); 529 return put_user(raddr, uaddr); 530 } 531 #else 532 long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg) 533 { 534 unsigned long ret; 535 long err; 536 537 err = do_shmat(shmid, compat_ptr(shmaddr), shmflg, &ret, COMPAT_SHMLBA); 538 if (err) 539 return err; 540 force_successful_syscall_return(); 541 return (long)ret; 542 } 543 #endif 544 545 static inline int get_compat_shmid64_ds(struct shmid64_ds *s64, 546 struct compat_shmid64_ds __user *up64) 547 { 548 if (!access_ok(VERIFY_READ, up64, sizeof(*up64))) 549 return -EFAULT; 550 return __get_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm); 551 } 552 553 static inline int get_compat_shmid_ds(struct shmid64_ds *s, 554 struct compat_shmid_ds __user *up) 555 { 556 if (!access_ok(VERIFY_READ, up, sizeof(*up))) 557 return -EFAULT; 558 return __get_compat_ipc_perm(&s->shm_perm, &up->shm_perm); 559 } 560 561 static inline int put_compat_shmid64_ds(struct shmid64_ds *s64, 562 struct compat_shmid64_ds __user *up64) 563 { 564 int err; 565 566 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) 567 return -EFAULT; 568 err = __put_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm); 569 err |= __put_user(s64->shm_atime, &up64->shm_atime); 570 err |= __put_user(s64->shm_dtime, &up64->shm_dtime); 571 err |= __put_user(s64->shm_ctime, &up64->shm_ctime); 572 err |= __put_user(s64->shm_segsz, &up64->shm_segsz); 573 err |= __put_user(s64->shm_nattch, &up64->shm_nattch); 574 err |= __put_user(s64->shm_cpid, &up64->shm_cpid); 575 err |= __put_user(s64->shm_lpid, &up64->shm_lpid); 576 return err; 577 } 578 579 static inline int put_compat_shmid_ds(struct shmid64_ds *s, 580 struct compat_shmid_ds __user *up) 581 { 582 int err; 583 584 if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) 585 return -EFAULT; 586 err = __put_compat_ipc_perm(&s->shm_perm, &up->shm_perm); 587 err |= __put_user(s->shm_atime, &up->shm_atime); 588 err |= __put_user(s->shm_dtime, &up->shm_dtime); 589 err |= __put_user(s->shm_ctime, &up->shm_ctime); 590 err |= __put_user(s->shm_segsz, &up->shm_segsz); 591 err |= __put_user(s->shm_nattch, &up->shm_nattch); 592 err |= __put_user(s->shm_cpid, &up->shm_cpid); 593 err |= __put_user(s->shm_lpid, &up->shm_lpid); 594 return err; 595 } 596 597 static inline int put_compat_shminfo64(struct shminfo64 *smi, 598 struct compat_shminfo64 __user *up64) 599 { 600 int err; 601 602 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) 603 return -EFAULT; 604 if (smi->shmmax > INT_MAX) 605 smi->shmmax = INT_MAX; 606 err = __put_user(smi->shmmax, &up64->shmmax); 607 err |= __put_user(smi->shmmin, &up64->shmmin); 608 err |= __put_user(smi->shmmni, &up64->shmmni); 609 err |= __put_user(smi->shmseg, &up64->shmseg); 610 err |= __put_user(smi->shmall, &up64->shmall); 611 return err; 612 } 613 614 static inline int put_compat_shminfo(struct shminfo64 *smi, 615 struct shminfo __user *up) 616 { 617 int err; 618 619 if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) 620 return -EFAULT; 621 if (smi->shmmax > INT_MAX) 622 smi->shmmax = INT_MAX; 623 err = __put_user(smi->shmmax, &up->shmmax); 624 err |= __put_user(smi->shmmin, &up->shmmin); 625 err |= __put_user(smi->shmmni, &up->shmmni); 626 err |= __put_user(smi->shmseg, &up->shmseg); 627 err |= __put_user(smi->shmall, &up->shmall); 628 return err; 629 } 630 631 static inline int put_compat_shm_info(struct shm_info __user *ip, 632 struct compat_shm_info __user *uip) 633 { 634 int err; 635 struct shm_info si; 636 637 if (!access_ok(VERIFY_WRITE, uip, sizeof(*uip)) || 638 copy_from_user(&si, ip, sizeof(si))) 639 return -EFAULT; 640 err = __put_user(si.used_ids, &uip->used_ids); 641 err |= __put_user(si.shm_tot, &uip->shm_tot); 642 err |= __put_user(si.shm_rss, &uip->shm_rss); 643 err |= __put_user(si.shm_swp, &uip->shm_swp); 644 err |= __put_user(si.swap_attempts, &uip->swap_attempts); 645 err |= __put_user(si.swap_successes, &uip->swap_successes); 646 return err; 647 } 648 649 long compat_sys_shmctl(int first, int second, void __user *uptr) 650 { 651 void __user *p; 652 struct shmid64_ds s64; 653 struct shminfo64 smi; 654 int err, err2; 655 int version = compat_ipc_parse_version(&second); 656 657 memset(&s64, 0, sizeof(s64)); 658 659 switch (second & (~IPC_64)) { 660 case IPC_RMID: 661 case SHM_LOCK: 662 case SHM_UNLOCK: 663 err = sys_shmctl(first, second, uptr); 664 break; 665 666 case IPC_INFO: 667 p = compat_alloc_user_space(sizeof(smi)); 668 err = sys_shmctl(first, second, p); 669 if (err < 0) 670 break; 671 if (copy_from_user(&smi, p, sizeof(smi))) 672 err2 = -EFAULT; 673 else if (version == IPC_64) 674 err2 = put_compat_shminfo64(&smi, uptr); 675 else 676 err2 = put_compat_shminfo(&smi, uptr); 677 if (err2) 678 err = -EFAULT; 679 break; 680 681 682 case IPC_SET: 683 if (version == IPC_64) { 684 err = get_compat_shmid64_ds(&s64, uptr); 685 } else { 686 err = get_compat_shmid_ds(&s64, uptr); 687 } 688 if (err) 689 break; 690 p = compat_alloc_user_space(sizeof(s64)); 691 if (copy_to_user(p, &s64, sizeof(s64))) 692 err = -EFAULT; 693 else 694 err = sys_shmctl(first, second, p); 695 break; 696 697 case IPC_STAT: 698 case SHM_STAT: 699 p = compat_alloc_user_space(sizeof(s64)); 700 err = sys_shmctl(first, second, p); 701 if (err < 0) 702 break; 703 if (copy_from_user(&s64, p, sizeof(s64))) 704 err2 = -EFAULT; 705 else if (version == IPC_64) 706 err2 = put_compat_shmid64_ds(&s64, uptr); 707 else 708 err2 = put_compat_shmid_ds(&s64, uptr); 709 if (err2) 710 err = -EFAULT; 711 break; 712 713 case SHM_INFO: 714 p = compat_alloc_user_space(sizeof(struct shm_info)); 715 err = sys_shmctl(first, second, p); 716 if (err < 0) 717 break; 718 err2 = put_compat_shm_info(p, uptr); 719 if (err2) 720 err = -EFAULT; 721 break; 722 723 default: 724 err = -EINVAL; 725 break; 726 } 727 return err; 728 } 729 730 long compat_sys_semtimedop(int semid, struct sembuf __user *tsems, 731 unsigned nsops, const struct compat_timespec __user *timeout) 732 { 733 struct timespec __user *ts64 = NULL; 734 if (timeout) { 735 struct timespec ts; 736 ts64 = compat_alloc_user_space(sizeof(*ts64)); 737 if (get_compat_timespec(&ts, timeout)) 738 return -EFAULT; 739 if (copy_to_user(ts64, &ts, sizeof(ts))) 740 return -EFAULT; 741 } 742 return sys_semtimedop(semid, tsems, nsops, ts64); 743 }
Cache object: 0d89a80ebd219a0c38d06b44e22cecef
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