linux/ipc/compat.c
<<
>>
Prefs
   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        if (!uptr)
 245                return -EINVAL;
 246        if (get_user(pad, (u32 __user *) uptr))
 247                return -EFAULT;
 248        if ((third & (~IPC_64)) == SETVAL)
 249                fourth.val = (int) pad;
 250        else
 251                fourth.__pad = compat_ptr(pad);
 252        switch (third & (~IPC_64)) {
 253        case IPC_INFO:
 254        case IPC_RMID:
 255        case SEM_INFO:
 256        case GETVAL:
 257        case GETPID:
 258        case GETNCNT:
 259        case GETZCNT:
 260        case GETALL:
 261        case SETVAL:
 262        case SETALL:
 263                err = sys_semctl(first, second, third, fourth);
 264                break;
 265
 266        case IPC_STAT:
 267        case SEM_STAT:
 268                up64 = compat_alloc_user_space(sizeof(s64));
 269                fourth.__pad = up64;
 270                err = sys_semctl(first, second, third, fourth);
 271                if (err < 0)
 272                        break;
 273                if (copy_from_user(&s64, up64, sizeof(s64)))
 274                        err2 = -EFAULT;
 275                else if (version == IPC_64)
 276                        err2 = put_compat_semid64_ds(&s64, compat_ptr(pad));
 277                else
 278                        err2 = put_compat_semid_ds(&s64, compat_ptr(pad));
 279                if (err2)
 280                        err = -EFAULT;
 281                break;
 282
 283        case IPC_SET:
 284                if (version == IPC_64) {
 285                        err = get_compat_semid64_ds(&s64, compat_ptr(pad));
 286                } else {
 287                        err = get_compat_semid_ds(&s64, compat_ptr(pad));
 288                }
 289                up64 = compat_alloc_user_space(sizeof(s64));
 290                if (copy_to_user(up64, &s64, sizeof(s64)))
 291                        err = -EFAULT;
 292                if (err)
 293                        break;
 294
 295                fourth.__pad = up64;
 296                err = sys_semctl(first, second, third, fourth);
 297                break;
 298
 299        default:
 300                err = -EINVAL;
 301                break;
 302        }
 303        return err;
 304}
 305
 306long compat_sys_msgsnd(int first, int second, int third, void __user *uptr)
 307{
 308        struct compat_msgbuf __user *up = uptr;
 309        long type;
 310
 311        if (first < 0)
 312                return -EINVAL;
 313        if (second < 0)
 314                return -EINVAL;
 315
 316        if (get_user(type, &up->mtype))
 317                return -EFAULT;
 318
 319        return do_msgsnd(first, type, up->mtext, second, third);
 320}
 321
 322long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
 323                           int version, void __user *uptr)
 324{
 325        struct compat_msgbuf __user *up;
 326        long type;
 327        int err;
 328
 329        if (first < 0)
 330                return -EINVAL;
 331        if (second < 0)
 332                return -EINVAL;
 333
 334        if (!version) {
 335                struct compat_ipc_kludge ipck;
 336                err = -EINVAL;
 337                if (!uptr)
 338                        goto out;
 339                err = -EFAULT;
 340                if (copy_from_user (&ipck, uptr, sizeof(ipck)))
 341                        goto out;
 342                uptr = compat_ptr(ipck.msgp);
 343                msgtyp = ipck.msgtyp;
 344        }
 345        up = uptr;
 346        err = do_msgrcv(first, &type, up->mtext, second, msgtyp, third);
 347        if (err < 0)
 348                goto out;
 349        if (put_user(type, &up->mtype))
 350                err = -EFAULT;
 351out:
 352        return err;
 353}
 354
 355static inline int get_compat_msqid64(struct msqid64_ds *m64,
 356                                     struct compat_msqid64_ds __user *up64)
 357{
 358        int err;
 359
 360        if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
 361                return -EFAULT;
 362        err  = __get_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
 363        err |= __get_user(m64->msg_qbytes, &up64->msg_qbytes);
 364        return err;
 365}
 366
 367static inline int get_compat_msqid(struct msqid64_ds *m,
 368                                   struct compat_msqid_ds __user *up)
 369{
 370        int err;
 371
 372        if (!access_ok(VERIFY_READ, up, sizeof(*up)))
 373                return -EFAULT;
 374        err  = __get_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
 375        err |= __get_user(m->msg_qbytes, &up->msg_qbytes);
 376        return err;
 377}
 378
 379static inline int put_compat_msqid64_ds(struct msqid64_ds *m64,
 380                                 struct compat_msqid64_ds __user *up64)
 381{
 382        int err;
 383
 384        if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
 385                return -EFAULT;
 386        err  = __put_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
 387        err |= __put_user(m64->msg_stime, &up64->msg_stime);
 388        err |= __put_user(m64->msg_rtime, &up64->msg_rtime);
 389        err |= __put_user(m64->msg_ctime, &up64->msg_ctime);
 390        err |= __put_user(m64->msg_cbytes, &up64->msg_cbytes);
 391        err |= __put_user(m64->msg_qnum, &up64->msg_qnum);
 392        err |= __put_user(m64->msg_qbytes, &up64->msg_qbytes);
 393        err |= __put_user(m64->msg_lspid, &up64->msg_lspid);
 394        err |= __put_user(m64->msg_lrpid, &up64->msg_lrpid);
 395        return err;
 396}
 397
 398static inline int put_compat_msqid_ds(struct msqid64_ds *m,
 399                                      struct compat_msqid_ds __user *up)
 400{
 401        int err;
 402
 403        if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
 404                return -EFAULT;
 405        err  = __put_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
 406        err |= __put_user(m->msg_stime, &up->msg_stime);
 407        err |= __put_user(m->msg_rtime, &up->msg_rtime);
 408        err |= __put_user(m->msg_ctime, &up->msg_ctime);
 409        err |= __put_user(m->msg_cbytes, &up->msg_cbytes);
 410        err |= __put_user(m->msg_qnum, &up->msg_qnum);
 411        err |= __put_user(m->msg_qbytes, &up->msg_qbytes);
 412        err |= __put_user(m->msg_lspid, &up->msg_lspid);
 413        err |= __put_user(m->msg_lrpid, &up->msg_lrpid);
 414        return err;
 415}
 416
 417long compat_sys_msgctl(int first, int second, void __user *uptr)
 418{
 419        int err, err2;
 420        struct msqid64_ds m64;
 421        int version = compat_ipc_parse_version(&second);
 422        void __user *p;
 423
 424        switch (second & (~IPC_64)) {
 425        case IPC_INFO:
 426        case IPC_RMID:
 427        case MSG_INFO:
 428                err = sys_msgctl(first, second, uptr);
 429                break;
 430
 431        case IPC_SET:
 432                if (version == IPC_64) {
 433                        err = get_compat_msqid64(&m64, uptr);
 434                } else {
 435                        err = get_compat_msqid(&m64, uptr);
 436                }
 437                if (err)
 438                        break;
 439                p = compat_alloc_user_space(sizeof(m64));
 440                if (copy_to_user(p, &m64, sizeof(m64)))
 441                        err = -EFAULT;
 442                else
 443                        err = sys_msgctl(first, second, p);
 444                break;
 445
 446        case IPC_STAT:
 447        case MSG_STAT:
 448                p = compat_alloc_user_space(sizeof(m64));
 449                err = sys_msgctl(first, second, p);
 450                if (err < 0)
 451                        break;
 452                if (copy_from_user(&m64, p, sizeof(m64)))
 453                        err2 = -EFAULT;
 454                else if (version == IPC_64)
 455                        err2 = put_compat_msqid64_ds(&m64, uptr);
 456                else
 457                        err2 = put_compat_msqid_ds(&m64, uptr);
 458                if (err2)
 459                        err = -EFAULT;
 460                break;
 461
 462        default:
 463                err = -EINVAL;
 464                break;
 465        }
 466        return err;
 467}
 468
 469long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
 470                        void __user *uptr)
 471{
 472        int err;
 473        unsigned long raddr;
 474        compat_ulong_t __user *uaddr;
 475
 476        if (version == 1)
 477                return -EINVAL;
 478        err = do_shmat(first, uptr, second, &raddr);
 479        if (err < 0)
 480                return err;
 481        uaddr = compat_ptr(third);
 482        return put_user(raddr, uaddr);
 483}
 484
 485static inline int get_compat_shmid64_ds(struct shmid64_ds *s64,
 486                                        struct compat_shmid64_ds __user *up64)
 487{
 488        if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
 489                return -EFAULT;
 490        return __get_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
 491}
 492
 493static inline int get_compat_shmid_ds(struct shmid64_ds *s,
 494                                      struct compat_shmid_ds __user *up)
 495{
 496        if (!access_ok(VERIFY_READ, up, sizeof(*up)))
 497                return -EFAULT;
 498        return __get_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
 499}
 500
 501static inline int put_compat_shmid64_ds(struct shmid64_ds *s64,
 502                                        struct compat_shmid64_ds __user *up64)
 503{
 504        int err;
 505
 506        if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
 507                return -EFAULT;
 508        err  = __put_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
 509        err |= __put_user(s64->shm_atime, &up64->shm_atime);
 510        err |= __put_user(s64->shm_dtime, &up64->shm_dtime);
 511        err |= __put_user(s64->shm_ctime, &up64->shm_ctime);
 512        err |= __put_user(s64->shm_segsz, &up64->shm_segsz);
 513        err |= __put_user(s64->shm_nattch, &up64->shm_nattch);
 514        err |= __put_user(s64->shm_cpid, &up64->shm_cpid);
 515        err |= __put_user(s64->shm_lpid, &up64->shm_lpid);
 516        return err;
 517}
 518
 519static inline int put_compat_shmid_ds(struct shmid64_ds *s,
 520                                      struct compat_shmid_ds __user *up)
 521{
 522        int err;
 523
 524        if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
 525                return -EFAULT;
 526        err  = __put_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
 527        err |= __put_user(s->shm_atime, &up->shm_atime);
 528        err |= __put_user(s->shm_dtime, &up->shm_dtime);
 529        err |= __put_user(s->shm_ctime, &up->shm_ctime);
 530        err |= __put_user(s->shm_segsz, &up->shm_segsz);
 531        err |= __put_user(s->shm_nattch, &up->shm_nattch);
 532        err |= __put_user(s->shm_cpid, &up->shm_cpid);
 533        err |= __put_user(s->shm_lpid, &up->shm_lpid);
 534        return err;
 535}
 536
 537static inline int put_compat_shminfo64(struct shminfo64 *smi,
 538                                       struct compat_shminfo64 __user *up64)
 539{
 540        int err;
 541
 542        if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
 543                return -EFAULT;
 544        if (smi->shmmax > INT_MAX)
 545                smi->shmmax = INT_MAX;
 546        err  = __put_user(smi->shmmax, &up64->shmmax);
 547        err |= __put_user(smi->shmmin, &up64->shmmin);
 548        err |= __put_user(smi->shmmni, &up64->shmmni);
 549        err |= __put_user(smi->shmseg, &up64->shmseg);
 550        err |= __put_user(smi->shmall, &up64->shmall);
 551        return err;
 552}
 553
 554static inline int put_compat_shminfo(struct shminfo64 *smi,
 555                                     struct shminfo __user *up)
 556{
 557        int err;
 558
 559        if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
 560                return -EFAULT;
 561        if (smi->shmmax > INT_MAX)
 562                smi->shmmax = INT_MAX;
 563        err  = __put_user(smi->shmmax, &up->shmmax);
 564        err |= __put_user(smi->shmmin, &up->shmmin);
 565        err |= __put_user(smi->shmmni, &up->shmmni);
 566        err |= __put_user(smi->shmseg, &up->shmseg);
 567        err |= __put_user(smi->shmall, &up->shmall);
 568        return err;
 569}
 570
 571static inline int put_compat_shm_info(struct shm_info __user *ip,
 572                                      struct compat_shm_info __user *uip)
 573{
 574        int err;
 575        struct shm_info si;
 576
 577        if (!access_ok(VERIFY_WRITE, uip, sizeof(*uip)) ||
 578            copy_from_user(&si, ip, sizeof(si)))
 579                return -EFAULT;
 580        err  = __put_user(si.used_ids, &uip->used_ids);
 581        err |= __put_user(si.shm_tot, &uip->shm_tot);
 582        err |= __put_user(si.shm_rss, &uip->shm_rss);
 583        err |= __put_user(si.shm_swp, &uip->shm_swp);
 584        err |= __put_user(si.swap_attempts, &uip->swap_attempts);
 585        err |= __put_user(si.swap_successes, &uip->swap_successes);
 586        return err;
 587}
 588
 589long compat_sys_shmctl(int first, int second, void __user *uptr)
 590{
 591        void __user *p;
 592        struct shmid64_ds s64;
 593        struct shminfo64 smi;
 594        int err, err2;
 595        int version = compat_ipc_parse_version(&second);
 596
 597        switch (second & (~IPC_64)) {
 598        case IPC_RMID:
 599        case SHM_LOCK:
 600        case SHM_UNLOCK:
 601                err = sys_shmctl(first, second, uptr);
 602                break;
 603
 604        case IPC_INFO:
 605                p = compat_alloc_user_space(sizeof(smi));
 606                err = sys_shmctl(first, second, p);
 607                if (err < 0)
 608                        break;
 609                if (copy_from_user(&smi, p, sizeof(smi)))
 610                        err2 = -EFAULT;
 611                else if (version == IPC_64)
 612                        err2 = put_compat_shminfo64(&smi, uptr);
 613                else
 614                        err2 = put_compat_shminfo(&smi, uptr);
 615                if (err2)
 616                        err = -EFAULT;
 617                break;
 618
 619
 620        case IPC_SET:
 621                if (version == IPC_64) {
 622                        err = get_compat_shmid64_ds(&s64, uptr);
 623                } else {
 624                        err = get_compat_shmid_ds(&s64, uptr);
 625                }
 626                if (err)
 627                        break;
 628                p = compat_alloc_user_space(sizeof(s64));
 629                if (copy_to_user(p, &s64, sizeof(s64)))
 630                        err = -EFAULT;
 631                else
 632                        err = sys_shmctl(first, second, p);
 633                break;
 634
 635        case IPC_STAT:
 636        case SHM_STAT:
 637                p = compat_alloc_user_space(sizeof(s64));
 638                err = sys_shmctl(first, second, p);
 639                if (err < 0)
 640                        break;
 641                if (copy_from_user(&s64, p, sizeof(s64)))
 642                        err2 = -EFAULT;
 643                else if (version == IPC_64)
 644                        err2 = put_compat_shmid64_ds(&s64, uptr);
 645                else
 646                        err2 = put_compat_shmid_ds(&s64, uptr);
 647                if (err2)
 648                        err = -EFAULT;
 649                break;
 650
 651        case SHM_INFO:
 652                p = compat_alloc_user_space(sizeof(struct shm_info));
 653                err = sys_shmctl(first, second, p);
 654                if (err < 0)
 655                        break;
 656                err2 = put_compat_shm_info(p, uptr);
 657                if (err2)
 658                        err = -EFAULT;
 659                break;
 660
 661        default:
 662                err = -EINVAL;
 663                break;
 664        }
 665        return err;
 666}
 667
 668long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
 669                unsigned nsops, const struct compat_timespec __user *timeout)
 670{
 671        struct timespec __user *ts64 = NULL;
 672        if (timeout) {
 673                struct timespec ts;
 674                ts64 = compat_alloc_user_space(sizeof(*ts64));
 675                if (get_compat_timespec(&ts, timeout))
 676                        return -EFAULT;
 677                if (copy_to_user(ts64, &ts, sizeof(ts)))
 678                        return -EFAULT;
 679        }
 680        return sys_semtimedop(semid, tsems, nsops, ts64);
 681}
 682
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.