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 unsigned long 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 #ifdef __BIG_ENDIAN 253 fourth = (unsigned long)pad << 32; 254 #else 255 fourth = pad; 256 #endif 257 else 258 fourth = (unsigned long)compat_ptr(pad); 259 switch (third & (~IPC_64)) { 260 case IPC_INFO: 261 case IPC_RMID: 262 case SEM_INFO: 263 case GETVAL: 264 case GETPID: 265 case GETNCNT: 266 case GETZCNT: 267 case GETALL: 268 case SETVAL: 269 case SETALL: 270 err = sys_semctl(first, second, third, fourth); 271 break; 272 273 case IPC_STAT: 274 case SEM_STAT: 275 up64 = compat_alloc_user_space(sizeof(s64)); 276 fourth = (unsigned long)up64; 277 err = sys_semctl(first, second, third, fourth); 278 if (err < 0) 279 break; 280 if (copy_from_user(&s64, up64, sizeof(s64))) 281 err2 = -EFAULT; 282 else if (version == IPC_64) 283 err2 = put_compat_semid64_ds(&s64, compat_ptr(pad)); 284 else 285 err2 = put_compat_semid_ds(&s64, compat_ptr(pad)); 286 if (err2) 287 err = -EFAULT; 288 break; 289 290 case IPC_SET: 291 if (version == IPC_64) { 292 err = get_compat_semid64_ds(&s64, compat_ptr(pad)); 293 } else { 294 err = get_compat_semid_ds(&s64, compat_ptr(pad)); 295 } 296 up64 = compat_alloc_user_space(sizeof(s64)); 297 if (copy_to_user(up64, &s64, sizeof(s64))) 298 err = -EFAULT; 299 if (err) 300 break; 301 302 fourth = (unsigned long)up64; 303 err = sys_semctl(first, second, third, fourth); 304 break; 305 306 default: 307 err = -EINVAL; 308 break; 309 } 310 return err; 311 } 312 313 static long compat_do_msg_fill(void __user *dest, struct msg_msg *msg, size_t bufsz) 314 { 315 struct compat_msgbuf __user *msgp = dest; 316 size_t msgsz; 317 318 if (put_user(msg->m_type, &msgp->mtype)) 319 return -EFAULT; 320 321 msgsz = (bufsz > msg->m_ts) ? msg->m_ts : bufsz; 322 if (store_msg(msgp->mtext, msg, msgsz)) 323 return -EFAULT; 324 return msgsz; 325 } 326 327 #ifndef COMPAT_SHMLBA 328 #define COMPAT_SHMLBA SHMLBA 329 #endif 330 331 #ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC 332 COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second, 333 u32, third, compat_uptr_t, ptr, u32, fifth) 334 { 335 int version; 336 u32 pad; 337 338 version = call >> 16; /* hack for backward compatibility */ 339 call &= 0xffff; 340 341 switch (call) { 342 case SEMOP: 343 /* struct sembuf is the same on 32 and 64bit :)) */ 344 return sys_semtimedop(first, compat_ptr(ptr), second, NULL); 345 case SEMTIMEDOP: 346 return compat_sys_semtimedop(first, compat_ptr(ptr), second, 347 compat_ptr(fifth)); 348 case SEMGET: 349 return sys_semget(first, second, third); 350 case SEMCTL: 351 if (!ptr) 352 return -EINVAL; 353 if (get_user(pad, (u32 __user *) compat_ptr(ptr))) 354 return -EFAULT; 355 return do_compat_semctl(first, second, third, pad); 356 357 case MSGSND: { 358 struct compat_msgbuf __user *up = compat_ptr(ptr); 359 compat_long_t type; 360 361 if (first < 0 || second < 0) 362 return -EINVAL; 363 364 if (get_user(type, &up->mtype)) 365 return -EFAULT; 366 367 return do_msgsnd(first, type, up->mtext, second, third); 368 } 369 case MSGRCV: { 370 void __user *uptr = compat_ptr(ptr); 371 372 if (first < 0 || second < 0) 373 return -EINVAL; 374 375 if (!version) { 376 struct compat_ipc_kludge ipck; 377 if (!uptr) 378 return -EINVAL; 379 if (copy_from_user (&ipck, uptr, sizeof(ipck))) 380 return -EFAULT; 381 uptr = compat_ptr(ipck.msgp); 382 fifth = ipck.msgtyp; 383 } 384 return do_msgrcv(first, uptr, second, fifth, third, 385 compat_do_msg_fill); 386 } 387 case MSGGET: 388 return sys_msgget(first, second); 389 case MSGCTL: 390 return compat_sys_msgctl(first, second, compat_ptr(ptr)); 391 392 case SHMAT: { 393 int err; 394 unsigned long raddr; 395 396 if (version == 1) 397 return -EINVAL; 398 err = do_shmat(first, compat_ptr(ptr), second, &raddr, 399 COMPAT_SHMLBA); 400 if (err < 0) 401 return err; 402 return put_user(raddr, (compat_ulong_t *)compat_ptr(third)); 403 } 404 case SHMDT: 405 return sys_shmdt(compat_ptr(ptr)); 406 case SHMGET: 407 return sys_shmget(first, (unsigned)second, third); 408 case SHMCTL: 409 return compat_sys_shmctl(first, second, compat_ptr(ptr)); 410 } 411 412 return -ENOSYS; 413 } 414 #endif 415 416 COMPAT_SYSCALL_DEFINE4(semctl, int, semid, int, semnum, int, cmd, int, arg) 417 { 418 return do_compat_semctl(semid, semnum, cmd, arg); 419 } 420 421 COMPAT_SYSCALL_DEFINE4(msgsnd, int, msqid, compat_uptr_t, msgp, 422 compat_ssize_t, msgsz, int, msgflg) 423 { 424 struct compat_msgbuf __user *up = compat_ptr(msgp); 425 compat_long_t mtype; 426 427 if (get_user(mtype, &up->mtype)) 428 return -EFAULT; 429 return do_msgsnd(msqid, mtype, up->mtext, (ssize_t)msgsz, msgflg); 430 } 431 432 COMPAT_SYSCALL_DEFINE5(msgrcv, int, msqid, compat_uptr_t, msgp, 433 compat_ssize_t, msgsz, long, msgtyp, int, msgflg) 434 { 435 return do_msgrcv(msqid, compat_ptr(msgp), (ssize_t)msgsz, msgtyp, 436 msgflg, compat_do_msg_fill); 437 } 438 439 static inline int get_compat_msqid64(struct msqid64_ds *m64, 440 struct compat_msqid64_ds __user *up64) 441 { 442 int err; 443 444 if (!access_ok(VERIFY_READ, up64, sizeof(*up64))) 445 return -EFAULT; 446 err = __get_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm); 447 err |= __get_user(m64->msg_qbytes, &up64->msg_qbytes); 448 return err; 449 } 450 451 static inline int get_compat_msqid(struct msqid64_ds *m, 452 struct compat_msqid_ds __user *up) 453 { 454 int err; 455 456 if (!access_ok(VERIFY_READ, up, sizeof(*up))) 457 return -EFAULT; 458 err = __get_compat_ipc_perm(&m->msg_perm, &up->msg_perm); 459 err |= __get_user(m->msg_qbytes, &up->msg_qbytes); 460 return err; 461 } 462 463 static inline int put_compat_msqid64_ds(struct msqid64_ds *m64, 464 struct compat_msqid64_ds __user *up64) 465 { 466 int err; 467 468 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) 469 return -EFAULT; 470 err = __put_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm); 471 err |= __put_user(m64->msg_stime, &up64->msg_stime); 472 err |= __put_user(m64->msg_rtime, &up64->msg_rtime); 473 err |= __put_user(m64->msg_ctime, &up64->msg_ctime); 474 err |= __put_user(m64->msg_cbytes, &up64->msg_cbytes); 475 err |= __put_user(m64->msg_qnum, &up64->msg_qnum); 476 err |= __put_user(m64->msg_qbytes, &up64->msg_qbytes); 477 err |= __put_user(m64->msg_lspid, &up64->msg_lspid); 478 err |= __put_user(m64->msg_lrpid, &up64->msg_lrpid); 479 return err; 480 } 481 482 static inline int put_compat_msqid_ds(struct msqid64_ds *m, 483 struct compat_msqid_ds __user *up) 484 { 485 int err; 486 487 if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) 488 return -EFAULT; 489 err = __put_compat_ipc_perm(&m->msg_perm, &up->msg_perm); 490 err |= __put_user(m->msg_stime, &up->msg_stime); 491 err |= __put_user(m->msg_rtime, &up->msg_rtime); 492 err |= __put_user(m->msg_ctime, &up->msg_ctime); 493 err |= __put_user(m->msg_cbytes, &up->msg_cbytes); 494 err |= __put_user(m->msg_qnum, &up->msg_qnum); 495 err |= __put_user(m->msg_qbytes, &up->msg_qbytes); 496 err |= __put_user(m->msg_lspid, &up->msg_lspid); 497 err |= __put_user(m->msg_lrpid, &up->msg_lrpid); 498 return err; 499 } 500 501 long compat_sys_msgctl(int first, int second, void __user *uptr) 502 { 503 int err, err2; 504 struct msqid64_ds m64; 505 int version = compat_ipc_parse_version(&second); 506 void __user *p; 507 508 memset(&m64, 0, sizeof(m64)); 509 510 switch (second & (~IPC_64)) { 511 case IPC_INFO: 512 case IPC_RMID: 513 case MSG_INFO: 514 err = sys_msgctl(first, second, uptr); 515 break; 516 517 case IPC_SET: 518 if (version == IPC_64) { 519 err = get_compat_msqid64(&m64, uptr); 520 } else { 521 err = get_compat_msqid(&m64, uptr); 522 } 523 if (err) 524 break; 525 p = compat_alloc_user_space(sizeof(m64)); 526 if (copy_to_user(p, &m64, sizeof(m64))) 527 err = -EFAULT; 528 else 529 err = sys_msgctl(first, second, p); 530 break; 531 532 case IPC_STAT: 533 case MSG_STAT: 534 p = compat_alloc_user_space(sizeof(m64)); 535 err = sys_msgctl(first, second, p); 536 if (err < 0) 537 break; 538 if (copy_from_user(&m64, p, sizeof(m64))) 539 err2 = -EFAULT; 540 else if (version == IPC_64) 541 err2 = put_compat_msqid64_ds(&m64, uptr); 542 else 543 err2 = put_compat_msqid_ds(&m64, uptr); 544 if (err2) 545 err = -EFAULT; 546 break; 547 548 default: 549 err = -EINVAL; 550 break; 551 } 552 return err; 553 } 554 555 COMPAT_SYSCALL_DEFINE3(shmat, int, shmid, compat_uptr_t, shmaddr, int, shmflg) 556 { 557 unsigned long ret; 558 long err; 559 560 err = do_shmat(shmid, compat_ptr(shmaddr), shmflg, &ret, COMPAT_SHMLBA); 561 if (err) 562 return err; 563 force_successful_syscall_return(); 564 return (long)ret; 565 } 566 567 static inline int get_compat_shmid64_ds(struct shmid64_ds *s64, 568 struct compat_shmid64_ds __user *up64) 569 { 570 if (!access_ok(VERIFY_READ, up64, sizeof(*up64))) 571 return -EFAULT; 572 return __get_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm); 573 } 574 575 static inline int get_compat_shmid_ds(struct shmid64_ds *s, 576 struct compat_shmid_ds __user *up) 577 { 578 if (!access_ok(VERIFY_READ, up, sizeof(*up))) 579 return -EFAULT; 580 return __get_compat_ipc_perm(&s->shm_perm, &up->shm_perm); 581 } 582 583 static inline int put_compat_shmid64_ds(struct shmid64_ds *s64, 584 struct compat_shmid64_ds __user *up64) 585 { 586 int err; 587 588 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) 589 return -EFAULT; 590 err = __put_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm); 591 err |= __put_user(s64->shm_atime, &up64->shm_atime); 592 err |= __put_user(s64->shm_dtime, &up64->shm_dtime); 593 err |= __put_user(s64->shm_ctime, &up64->shm_ctime); 594 err |= __put_user(s64->shm_segsz, &up64->shm_segsz); 595 err |= __put_user(s64->shm_nattch, &up64->shm_nattch); 596 err |= __put_user(s64->shm_cpid, &up64->shm_cpid); 597 err |= __put_user(s64->shm_lpid, &up64->shm_lpid); 598 return err; 599 } 600 601 static inline int put_compat_shmid_ds(struct shmid64_ds *s, 602 struct compat_shmid_ds __user *up) 603 { 604 int err; 605 606 if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) 607 return -EFAULT; 608 err = __put_compat_ipc_perm(&s->shm_perm, &up->shm_perm); 609 err |= __put_user(s->shm_atime, &up->shm_atime); 610 err |= __put_user(s->shm_dtime, &up->shm_dtime); 611 err |= __put_user(s->shm_ctime, &up->shm_ctime); 612 err |= __put_user(s->shm_segsz, &up->shm_segsz); 613 err |= __put_user(s->shm_nattch, &up->shm_nattch); 614 err |= __put_user(s->shm_cpid, &up->shm_cpid); 615 err |= __put_user(s->shm_lpid, &up->shm_lpid); 616 return err; 617 } 618 619 static inline int put_compat_shminfo64(struct shminfo64 *smi, 620 struct compat_shminfo64 __user *up64) 621 { 622 int err; 623 624 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) 625 return -EFAULT; 626 if (smi->shmmax > INT_MAX) 627 smi->shmmax = INT_MAX; 628 err = __put_user(smi->shmmax, &up64->shmmax); 629 err |= __put_user(smi->shmmin, &up64->shmmin); 630 err |= __put_user(smi->shmmni, &up64->shmmni); 631 err |= __put_user(smi->shmseg, &up64->shmseg); 632 err |= __put_user(smi->shmall, &up64->shmall); 633 return err; 634 } 635 636 static inline int put_compat_shminfo(struct shminfo64 *smi, 637 struct shminfo __user *up) 638 { 639 int err; 640 641 if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) 642 return -EFAULT; 643 if (smi->shmmax > INT_MAX) 644 smi->shmmax = INT_MAX; 645 err = __put_user(smi->shmmax, &up->shmmax); 646 err |= __put_user(smi->shmmin, &up->shmmin); 647 err |= __put_user(smi->shmmni, &up->shmmni); 648 err |= __put_user(smi->shmseg, &up->shmseg); 649 err |= __put_user(smi->shmall, &up->shmall); 650 return err; 651 } 652 653 static inline int put_compat_shm_info(struct shm_info __user *ip, 654 struct compat_shm_info __user *uip) 655 { 656 int err; 657 struct shm_info si; 658 659 if (!access_ok(VERIFY_WRITE, uip, sizeof(*uip)) || 660 copy_from_user(&si, ip, sizeof(si))) 661 return -EFAULT; 662 err = __put_user(si.used_ids, &uip->used_ids); 663 err |= __put_user(si.shm_tot, &uip->shm_tot); 664 err |= __put_user(si.shm_rss, &uip->shm_rss); 665 err |= __put_user(si.shm_swp, &uip->shm_swp); 666 err |= __put_user(si.swap_attempts, &uip->swap_attempts); 667 err |= __put_user(si.swap_successes, &uip->swap_successes); 668 return err; 669 } 670 671 long compat_sys_shmctl(int first, int second, void __user *uptr) 672 { 673 void __user *p; 674 struct shmid64_ds s64; 675 struct shminfo64 smi; 676 int err, err2; 677 int version = compat_ipc_parse_version(&second); 678 679 memset(&s64, 0, sizeof(s64)); 680 681 switch (second & (~IPC_64)) { 682 case IPC_RMID: 683 case SHM_LOCK: 684 case SHM_UNLOCK: 685 err = sys_shmctl(first, second, uptr); 686 break; 687 688 case IPC_INFO: 689 p = compat_alloc_user_space(sizeof(smi)); 690 err = sys_shmctl(first, second, p); 691 if (err < 0) 692 break; 693 if (copy_from_user(&smi, p, sizeof(smi))) 694 err2 = -EFAULT; 695 else if (version == IPC_64) 696 err2 = put_compat_shminfo64(&smi, uptr); 697 else 698 err2 = put_compat_shminfo(&smi, uptr); 699 if (err2) 700 err = -EFAULT; 701 break; 702 703 704 case IPC_SET: 705 if (version == IPC_64) { 706 err = get_compat_shmid64_ds(&s64, uptr); 707 } else { 708 err = get_compat_shmid_ds(&s64, uptr); 709 } 710 if (err) 711 break; 712 p = compat_alloc_user_space(sizeof(s64)); 713 if (copy_to_user(p, &s64, sizeof(s64))) 714 err = -EFAULT; 715 else 716 err = sys_shmctl(first, second, p); 717 break; 718 719 case IPC_STAT: 720 case SHM_STAT: 721 p = compat_alloc_user_space(sizeof(s64)); 722 err = sys_shmctl(first, second, p); 723 if (err < 0) 724 break; 725 if (copy_from_user(&s64, p, sizeof(s64))) 726 err2 = -EFAULT; 727 else if (version == IPC_64) 728 err2 = put_compat_shmid64_ds(&s64, uptr); 729 else 730 err2 = put_compat_shmid_ds(&s64, uptr); 731 if (err2) 732 err = -EFAULT; 733 break; 734 735 case SHM_INFO: 736 p = compat_alloc_user_space(sizeof(struct shm_info)); 737 err = sys_shmctl(first, second, p); 738 if (err < 0) 739 break; 740 err2 = put_compat_shm_info(p, uptr); 741 if (err2) 742 err = -EFAULT; 743 break; 744 745 default: 746 err = -EINVAL; 747 break; 748 } 749 return err; 750 } 751 752 long compat_sys_semtimedop(int semid, struct sembuf __user *tsems, 753 unsigned nsops, const struct compat_timespec __user *timeout) 754 { 755 struct timespec __user *ts64 = NULL; 756 if (timeout) { 757 struct timespec ts; 758 ts64 = compat_alloc_user_space(sizeof(*ts64)); 759 if (get_compat_timespec(&ts, timeout)) 760 return -EFAULT; 761 if (copy_to_user(ts64, &ts, sizeof(ts))) 762 return -EFAULT; 763 } 764 return sys_semtimedop(semid, tsems, nsops, ts64); 765 } 766