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