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 #ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC 310 long compat_sys_semctl(int first, int second, int third, void __user *uptr) 311 { 312 u32 pad; 313 314 if (!uptr) 315 return -EINVAL; 316 if (get_user(pad, (u32 __user *) uptr)) 317 return -EFAULT; 318 return do_compat_semctl(first, second, third, pad); 319 } 320 321 long compat_sys_msgsnd(int first, int second, int third, void __user *uptr) 322 { 323 struct compat_msgbuf __user *up = uptr; 324 long type; 325 326 if (first < 0) 327 return -EINVAL; 328 if (second < 0) 329 return -EINVAL; 330 331 if (get_user(type, &up->mtype)) 332 return -EFAULT; 333 334 return do_msgsnd(first, type, up->mtext, second, third); 335 } 336 337 long compat_sys_msgrcv(int first, int second, int msgtyp, int third, 338 int version, void __user *uptr) 339 { 340 struct compat_msgbuf __user *up; 341 long type; 342 int err; 343 344 if (first < 0) 345 return -EINVAL; 346 if (second < 0) 347 return -EINVAL; 348 349 if (!version) { 350 struct compat_ipc_kludge ipck; 351 err = -EINVAL; 352 if (!uptr) 353 goto out; 354 err = -EFAULT; 355 if (copy_from_user (&ipck, uptr, sizeof(ipck))) 356 goto out; 357 uptr = compat_ptr(ipck.msgp); 358 msgtyp = ipck.msgtyp; 359 } 360 up = uptr; 361 err = do_msgrcv(first, &type, up->mtext, second, msgtyp, third); 362 if (err < 0) 363 goto out; 364 if (put_user(type, &up->mtype)) 365 err = -EFAULT; 366 out: 367 return err; 368 } 369 #else 370 long compat_sys_semctl(int semid, int semnum, int cmd, int arg) 371 { 372 return do_compat_semctl(semid, semnum, cmd, arg); 373 } 374 375 long compat_sys_msgsnd(int msqid, struct compat_msgbuf __user *msgp, 376 compat_ssize_t msgsz, int msgflg) 377 { 378 compat_long_t mtype; 379 380 if (get_user(mtype, &msgp->mtype)) 381 return -EFAULT; 382 return do_msgsnd(msqid, mtype, msgp->mtext, (ssize_t)msgsz, msgflg); 383 } 384 385 long compat_sys_msgrcv(int msqid, struct compat_msgbuf __user *msgp, 386 compat_ssize_t msgsz, long msgtyp, int msgflg) 387 { 388 long err, mtype; 389 390 err = do_msgrcv(msqid, &mtype, msgp->mtext, (ssize_t)msgsz, msgtyp, msgflg); 391 if (err < 0) 392 goto out; 393 394 if (put_user(mtype, &msgp->mtype)) 395 err = -EFAULT; 396 out: 397 return err; 398 } 399 #endif 400 401 static inline int get_compat_msqid64(struct msqid64_ds *m64, 402 struct compat_msqid64_ds __user *up64) 403 { 404 int err; 405 406 if (!access_ok(VERIFY_READ, up64, sizeof(*up64))) 407 return -EFAULT; 408 err = __get_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm); 409 err |= __get_user(m64->msg_qbytes, &up64->msg_qbytes); 410 return err; 411 } 412 413 static inline int get_compat_msqid(struct msqid64_ds *m, 414 struct compat_msqid_ds __user *up) 415 { 416 int err; 417 418 if (!access_ok(VERIFY_READ, up, sizeof(*up))) 419 return -EFAULT; 420 err = __get_compat_ipc_perm(&m->msg_perm, &up->msg_perm); 421 err |= __get_user(m->msg_qbytes, &up->msg_qbytes); 422 return err; 423 } 424 425 static inline int put_compat_msqid64_ds(struct msqid64_ds *m64, 426 struct compat_msqid64_ds __user *up64) 427 { 428 int err; 429 430 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) 431 return -EFAULT; 432 err = __put_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm); 433 err |= __put_user(m64->msg_stime, &up64->msg_stime); 434 err |= __put_user(m64->msg_rtime, &up64->msg_rtime); 435 err |= __put_user(m64->msg_ctime, &up64->msg_ctime); 436 err |= __put_user(m64->msg_cbytes, &up64->msg_cbytes); 437 err |= __put_user(m64->msg_qnum, &up64->msg_qnum); 438 err |= __put_user(m64->msg_qbytes, &up64->msg_qbytes); 439 err |= __put_user(m64->msg_lspid, &up64->msg_lspid); 440 err |= __put_user(m64->msg_lrpid, &up64->msg_lrpid); 441 return err; 442 } 443 444 static inline int put_compat_msqid_ds(struct msqid64_ds *m, 445 struct compat_msqid_ds __user *up) 446 { 447 int err; 448 449 if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) 450 return -EFAULT; 451 err = __put_compat_ipc_perm(&m->msg_perm, &up->msg_perm); 452 err |= __put_user(m->msg_stime, &up->msg_stime); 453 err |= __put_user(m->msg_rtime, &up->msg_rtime); 454 err |= __put_user(m->msg_ctime, &up->msg_ctime); 455 err |= __put_user(m->msg_cbytes, &up->msg_cbytes); 456 err |= __put_user(m->msg_qnum, &up->msg_qnum); 457 err |= __put_user(m->msg_qbytes, &up->msg_qbytes); 458 err |= __put_user(m->msg_lspid, &up->msg_lspid); 459 err |= __put_user(m->msg_lrpid, &up->msg_lrpid); 460 return err; 461 } 462 463 long compat_sys_msgctl(int first, int second, void __user *uptr) 464 { 465 int err, err2; 466 struct msqid64_ds m64; 467 int version = compat_ipc_parse_version(&second); 468 void __user *p; 469 470 memset(&m64, 0, sizeof(m64)); 471 472 switch (second & (~IPC_64)) { 473 case IPC_INFO: 474 case IPC_RMID: 475 case MSG_INFO: 476 err = sys_msgctl(first, second, uptr); 477 break; 478 479 case IPC_SET: 480 if (version == IPC_64) { 481 err = get_compat_msqid64(&m64, uptr); 482 } else { 483 err = get_compat_msqid(&m64, uptr); 484 } 485 if (err) 486 break; 487 p = compat_alloc_user_space(sizeof(m64)); 488 if (copy_to_user(p, &m64, sizeof(m64))) 489 err = -EFAULT; 490 else 491 err = sys_msgctl(first, second, p); 492 break; 493 494 case IPC_STAT: 495 case MSG_STAT: 496 p = compat_alloc_user_space(sizeof(m64)); 497 err = sys_msgctl(first, second, p); 498 if (err < 0) 499 break; 500 if (copy_from_user(&m64, p, sizeof(m64))) 501 err2 = -EFAULT; 502 else if (version == IPC_64) 503 err2 = put_compat_msqid64_ds(&m64, uptr); 504 else 505 err2 = put_compat_msqid_ds(&m64, uptr); 506 if (err2) 507 err = -EFAULT; 508 break; 509 510 default: 511 err = -EINVAL; 512 break; 513 } 514 return err; 515 } 516 517 #ifndef COMPAT_SHMLBA 518 #define COMPAT_SHMLBA SHMLBA 519 #endif 520 521 #ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC 522 long compat_sys_shmat(int first, int second, compat_uptr_t third, int version, 523 void __user *uptr) 524 { 525 int err; 526 unsigned long raddr; 527 compat_ulong_t __user *uaddr; 528 529 if (version == 1) 530 return -EINVAL; 531 err = do_shmat(first, uptr, second, &raddr, COMPAT_SHMLBA); 532 if (err < 0) 533 return err; 534 uaddr = compat_ptr(third); 535 return put_user(raddr, uaddr); 536 } 537 #else 538 long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg) 539 { 540 unsigned long ret; 541 long err; 542 543 err = do_shmat(shmid, compat_ptr(shmaddr), shmflg, &ret, COMPAT_SHMLBA); 544 if (err) 545 return err; 546 force_successful_syscall_return(); 547 return (long)ret; 548 } 549 #endif 550 551 static inline int get_compat_shmid64_ds(struct shmid64_ds *s64, 552 struct compat_shmid64_ds __user *up64) 553 { 554 if (!access_ok(VERIFY_READ, up64, sizeof(*up64))) 555 return -EFAULT; 556 return __get_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm); 557 } 558 559 static inline int get_compat_shmid_ds(struct shmid64_ds *s, 560 struct compat_shmid_ds __user *up) 561 { 562 if (!access_ok(VERIFY_READ, up, sizeof(*up))) 563 return -EFAULT; 564 return __get_compat_ipc_perm(&s->shm_perm, &up->shm_perm); 565 } 566 567 static inline int put_compat_shmid64_ds(struct shmid64_ds *s64, 568 struct compat_shmid64_ds __user *up64) 569 { 570 int err; 571 572 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) 573 return -EFAULT; 574 err = __put_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm); 575 err |= __put_user(s64->shm_atime, &up64->shm_atime); 576 err |= __put_user(s64->shm_dtime, &up64->shm_dtime); 577 err |= __put_user(s64->shm_ctime, &up64->shm_ctime); 578 err |= __put_user(s64->shm_segsz, &up64->shm_segsz); 579 err |= __put_user(s64->shm_nattch, &up64->shm_nattch); 580 err |= __put_user(s64->shm_cpid, &up64->shm_cpid); 581 err |= __put_user(s64->shm_lpid, &up64->shm_lpid); 582 return err; 583 } 584 585 static inline int put_compat_shmid_ds(struct shmid64_ds *s, 586 struct compat_shmid_ds __user *up) 587 { 588 int err; 589 590 if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) 591 return -EFAULT; 592 err = __put_compat_ipc_perm(&s->shm_perm, &up->shm_perm); 593 err |= __put_user(s->shm_atime, &up->shm_atime); 594 err |= __put_user(s->shm_dtime, &up->shm_dtime); 595 err |= __put_user(s->shm_ctime, &up->shm_ctime); 596 err |= __put_user(s->shm_segsz, &up->shm_segsz); 597 err |= __put_user(s->shm_nattch, &up->shm_nattch); 598 err |= __put_user(s->shm_cpid, &up->shm_cpid); 599 err |= __put_user(s->shm_lpid, &up->shm_lpid); 600 return err; 601 } 602 603 static inline int put_compat_shminfo64(struct shminfo64 *smi, 604 struct compat_shminfo64 __user *up64) 605 { 606 int err; 607 608 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) 609 return -EFAULT; 610 if (smi->shmmax > INT_MAX) 611 smi->shmmax = INT_MAX; 612 err = __put_user(smi->shmmax, &up64->shmmax); 613 err |= __put_user(smi->shmmin, &up64->shmmin); 614 err |= __put_user(smi->shmmni, &up64->shmmni); 615 err |= __put_user(smi->shmseg, &up64->shmseg); 616 err |= __put_user(smi->shmall, &up64->shmall); 617 return err; 618 } 619 620 static inline int put_compat_shminfo(struct shminfo64 *smi, 621 struct shminfo __user *up) 622 { 623 int err; 624 625 if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) 626 return -EFAULT; 627 if (smi->shmmax > INT_MAX) 628 smi->shmmax = INT_MAX; 629 err = __put_user(smi->shmmax, &up->shmmax); 630 err |= __put_user(smi->shmmin, &up->shmmin); 631 err |= __put_user(smi->shmmni, &up->shmmni); 632 err |= __put_user(smi->shmseg, &up->shmseg); 633 err |= __put_user(smi->shmall, &up->shmall); 634 return err; 635 } 636 637 static inline int put_compat_shm_info(struct shm_info __user *ip, 638 struct compat_shm_info __user *uip) 639 { 640 int err; 641 struct shm_info si; 642 643 if (!access_ok(VERIFY_WRITE, uip, sizeof(*uip)) || 644 copy_from_user(&si, ip, sizeof(si))) 645 return -EFAULT; 646 err = __put_user(si.used_ids, &uip->used_ids); 647 err |= __put_user(si.shm_tot, &uip->shm_tot); 648 err |= __put_user(si.shm_rss, &uip->shm_rss); 649 err |= __put_user(si.shm_swp, &uip->shm_swp); 650 err |= __put_user(si.swap_attempts, &uip->swap_attempts); 651 err |= __put_user(si.swap_successes, &uip->swap_successes); 652 return err; 653 } 654 655 long compat_sys_shmctl(int first, int second, void __user *uptr) 656 { 657 void __user *p; 658 struct shmid64_ds s64; 659 struct shminfo64 smi; 660 int err, err2; 661 int version = compat_ipc_parse_version(&second); 662 663 memset(&s64, 0, sizeof(s64)); 664 665 switch (second & (~IPC_64)) { 666 case IPC_RMID: 667 case SHM_LOCK: 668 case SHM_UNLOCK: 669 err = sys_shmctl(first, second, uptr); 670 break; 671 672 case IPC_INFO: 673 p = compat_alloc_user_space(sizeof(smi)); 674 err = sys_shmctl(first, second, p); 675 if (err < 0) 676 break; 677 if (copy_from_user(&smi, p, sizeof(smi))) 678 err2 = -EFAULT; 679 else if (version == IPC_64) 680 err2 = put_compat_shminfo64(&smi, uptr); 681 else 682 err2 = put_compat_shminfo(&smi, uptr); 683 if (err2) 684 err = -EFAULT; 685 break; 686 687 688 case IPC_SET: 689 if (version == IPC_64) { 690 err = get_compat_shmid64_ds(&s64, uptr); 691 } else { 692 err = get_compat_shmid_ds(&s64, uptr); 693 } 694 if (err) 695 break; 696 p = compat_alloc_user_space(sizeof(s64)); 697 if (copy_to_user(p, &s64, sizeof(s64))) 698 err = -EFAULT; 699 else 700 err = sys_shmctl(first, second, p); 701 break; 702 703 case IPC_STAT: 704 case SHM_STAT: 705 p = compat_alloc_user_space(sizeof(s64)); 706 err = sys_shmctl(first, second, p); 707 if (err < 0) 708 break; 709 if (copy_from_user(&s64, p, sizeof(s64))) 710 err2 = -EFAULT; 711 else if (version == IPC_64) 712 err2 = put_compat_shmid64_ds(&s64, uptr); 713 else 714 err2 = put_compat_shmid_ds(&s64, uptr); 715 if (err2) 716 err = -EFAULT; 717 break; 718 719 case SHM_INFO: 720 p = compat_alloc_user_space(sizeof(struct shm_info)); 721 err = sys_shmctl(first, second, p); 722 if (err < 0) 723 break; 724 err2 = put_compat_shm_info(p, uptr); 725 if (err2) 726 err = -EFAULT; 727 break; 728 729 default: 730 err = -EINVAL; 731 break; 732 } 733 return err; 734 } 735 736 long compat_sys_semtimedop(int semid, struct sembuf __user *tsems, 737 unsigned nsops, const struct compat_timespec __user *timeout) 738 { 739 struct timespec __user *ts64 = NULL; 740 if (timeout) { 741 struct timespec ts; 742 ts64 = compat_alloc_user_space(sizeof(*ts64)); 743 if (get_compat_timespec(&ts, timeout)) 744 return -EFAULT; 745 if (copy_to_user(ts64, &ts, sizeof(ts))) 746 return -EFAULT; 747 } 748 return sys_semtimedop(semid, tsems, nsops, ts64); 749 } 750