ipc/compat.c

   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/config.h>
  25 #include <linux/errno.h>
  26 #include <linux/highuid.h>
  27 #include <linux/init.h>
  28 #include <linux/msg.h>
  29 #include <linux/shm.h>
  30 #include <linux/slab.h>
  31 #include <linux/syscalls.h>
  32
  33 #include <asm/semaphore.h>
  34 #include <asm/uaccess.h>
  35
  36 #include "util.h"
  37
  38 struct compat_msgbuf {
  39         compat_long_t mtype;
  40         char mtext[1];
  41 };
  42
  43 struct compat_ipc_perm {
  44         key_t key;
  45         __compat_uid_t uid;
  46         __compat_gid_t gid;
  47         __compat_uid_t cuid;
  48         __compat_gid_t cgid;
  49         compat_mode_t mode;
  50         unsigned short seq;
  51 };
  52
  53 struct compat_semid_ds {
  54         struct compat_ipc_perm sem_perm;
  55         compat_time_t sem_otime;
  56         compat_time_t sem_ctime;
  57         compat_uptr_t sem_base;
  58         compat_uptr_t sem_pending;
  59         compat_uptr_t sem_pending_last;
  60         compat_uptr_t undo;
  61         unsigned short sem_nsems;
  62 };
  63
  64 struct compat_msqid_ds {
  65         struct compat_ipc_perm msg_perm;
  66         compat_uptr_t msg_first;
  67         compat_uptr_t msg_last;
  68         compat_time_t msg_stime;
  69         compat_time_t msg_rtime;
  70         compat_time_t msg_ctime;
  71         compat_ulong_t msg_lcbytes;
  72         compat_ulong_t msg_lqbytes;
  73         unsigned short msg_cbytes;
  74         unsigned short msg_qnum;
  75         unsigned short msg_qbytes;
  76         compat_ipc_pid_t msg_lspid;
  77         compat_ipc_pid_t msg_lrpid;
  78 };
  79
  80 struct compat_shmid_ds {
  81         struct compat_ipc_perm shm_perm;
  82         int shm_segsz;
  83         compat_time_t shm_atime;
  84         compat_time_t shm_dtime;
  85         compat_time_t shm_ctime;
  86         compat_ipc_pid_t shm_cpid;
  87         compat_ipc_pid_t shm_lpid;
  88         unsigned short shm_nattch;
  89         unsigned short shm_unused;
  90         compat_uptr_t shm_unused2;
  91         compat_uptr_t shm_unused3;
  92 };
  93
  94 struct compat_ipc_kludge {
  95         compat_uptr_t msgp;
  96         compat_long_t msgtyp;
  97 };
  98
  99 struct compat_shminfo64 {
 100         compat_ulong_t shmmax;
 101         compat_ulong_t shmmin;
 102         compat_ulong_t shmmni;
 103         compat_ulong_t shmseg;
 104         compat_ulong_t shmall;
 105         compat_ulong_t __unused1;
 106         compat_ulong_t __unused2;
 107         compat_ulong_t __unused3;
 108         compat_ulong_t __unused4;
 109 };
 110
 111 struct compat_shm_info {
 112         compat_int_t used_ids;
 113         compat_ulong_t shm_tot, shm_rss, shm_swp;
 114         compat_ulong_t swap_attempts, swap_successes;
 115 };
 116
 117 extern int sem_ctls[];
 118 #define sc_semopm       (sem_ctls[2])
 119 #define MAXBUF (64*1024)
 120
 121 static inline int compat_ipc_parse_version(int *cmd)
 122 {
 123         int version = *cmd & IPC_64;
 124
 125         /* this is tricky: architectures that have support for the old
 126          * ipc structures in 64 bit binaries need to have IPC_64 set
 127          * in cmd, the others need to have it cleared */
 128 #ifndef ipc_parse_version
 129         *cmd |= IPC_64;
 130 #else
 131         *cmd &= ~IPC_64;
 132 #endif
 133         return version;
 134 }
 135
 136 static inline int __get_compat_ipc64_perm(struct ipc64_perm *p64,
 137                                           struct compat_ipc64_perm __user *up64)
 138 {
 139         int err;
 140
 141         err  = __get_user(p64->uid, &up64->uid);
 142         err |= __get_user(p64->gid, &up64->gid);
 143         err |= __get_user(p64->mode, &up64->mode);
 144         return err;
 145 }
 146
 147 static inline int __get_compat_ipc_perm(struct ipc64_perm *p,
 148                                         struct compat_ipc_perm __user *up)
 149 {
 150         int err;
 151
 152         err  = __get_user(p->uid, &up->uid);
 153         err |= __get_user(p->gid, &up->gid);
 154         err |= __get_user(p->mode, &up->mode);
 155         return err;
 156 }
 157
 158 static inline int __put_compat_ipc64_perm(struct ipc64_perm *p64,
 159                                           struct compat_ipc64_perm __user *up64)
 160 {
 161         int err;
 162
 163         err  = __put_user(p64->key, &up64->key);
 164         err |= __put_user(p64->uid, &up64->uid);
 165         err |= __put_user(p64->gid, &up64->gid);
 166         err |= __put_user(p64->cuid, &up64->cuid);
 167         err |= __put_user(p64->cgid, &up64->cgid);
 168         err |= __put_user(p64->mode, &up64->mode);
 169         err |= __put_user(p64->seq, &up64->seq);
 170         return err;
 171 }
 172
 173 static inline int __put_compat_ipc_perm(struct ipc64_perm *p,
 174                                         struct compat_ipc_perm __user *up)
 175 {
 176         int err;
 177         __compat_uid_t u;
 178         __compat_gid_t g;
 179
 180         err  = __put_user(p->key, &up->key);
 181         SET_UID(u, p->uid);
 182         err |= __put_user(u, &up->uid);
 183         SET_GID(g, p->gid);
 184         err |= __put_user(g, &up->gid);
 185         SET_UID(u, p->cuid);
 186         err |= __put_user(u, &up->cuid);
 187         SET_GID(g, p->cgid);
 188         err |= __put_user(g, &up->cgid);
 189         err |= __put_user(p->mode, &up->mode);
 190         err |= __put_user(p->seq, &up->seq);
 191         return err;
 192 }
 193
 194 static inline int get_compat_semid64_ds(struct semid64_ds *s64,
 195                                         struct compat_semid64_ds __user *up64)
 196 {
 197         if (!access_ok (VERIFY_READ, up64, sizeof(*up64)))
 198                 return -EFAULT;
 199         return __get_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm);
 200 }
 201
 202 static inline int get_compat_semid_ds(struct semid64_ds *s,
 203                                       struct compat_semid_ds __user *up)
 204 {
 205         if (!access_ok (VERIFY_READ, up, sizeof(*up)))
 206                 return -EFAULT;
 207         return __get_compat_ipc_perm(&s->sem_perm, &up->sem_perm);
 208 }
 209
 210 static inline int put_compat_semid64_ds(struct semid64_ds *s64,
 211                                         struct compat_semid64_ds __user *up64)
 212 {
 213         int err;
 214
 215         if (!access_ok (VERIFY_WRITE, up64, sizeof(*up64)))
 216                 return -EFAULT;
 217         err  = __put_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm);
 218         err |= __put_user(s64->sem_otime, &up64->sem_otime);
 219         err |= __put_user(s64->sem_ctime, &up64->sem_ctime);
 220         err |= __put_user(s64->sem_nsems, &up64->sem_nsems);
 221         return err;
 222 }
 223
 224 static inline int put_compat_semid_ds(struct semid64_ds *s,
 225                                       struct compat_semid_ds __user *up)
 226 {
 227         int err;
 228
 229         if (!access_ok (VERIFY_WRITE, up, sizeof(*up)))
 230                 err = -EFAULT;
 231         err  = __put_compat_ipc_perm(&s->sem_perm, &up->sem_perm);
 232         err |= __put_user(s->sem_otime, &up->sem_otime);
 233         err |= __put_user(s->sem_ctime, &up->sem_ctime);
 234         err |= __put_user(s->sem_nsems, &up->sem_nsems);
 235         return err;
 236 }
 237
 238 long compat_sys_semctl(int first, int second, int third, void __user *uptr)
 239 {
 240         union semun fourth;
 241         u32 pad;
 242         int err, err2;
 243         struct semid64_ds s64;
 244         struct semid64_ds __user *up64;
 245         int version = compat_ipc_parse_version(&third);
 246
 247         if (!uptr)
 248                 return -EINVAL;
 249         if (get_user(pad, (u32 __user *) uptr))
 250                 return -EFAULT;
 251         if ((third & (~IPC_64)) == SETVAL)
 252                 fourth.val = (int) pad;
 253         else
 254                 fourth.__pad = compat_ptr(pad);
 255         switch (third & (~IPC_64)) {
 256         case IPC_INFO:
 257         case IPC_RMID:
 258         case SEM_INFO:
 259         case GETVAL:
 260         case GETPID:
 261         case GETNCNT:
 262         case GETZCNT:
 263         case GETALL:
 264         case SETVAL:
 265         case SETALL:
 266                 err = sys_semctl(first, second, third, fourth);
 267                 break;
 268
 269         case IPC_STAT:
 270         case SEM_STAT:
 271                 up64 = compat_alloc_user_space(sizeof(s64));
 272                 fourth.__pad = up64;
 273                 err = sys_semctl(first, second, third, fourth);
 274                 if (err < 0)
 275                         break;
 276                 if (copy_from_user(&s64, up64, sizeof(s64)))
 277                         err2 = -EFAULT;
 278                 else if (version == IPC_64)
 279                         err2 = put_compat_semid64_ds(&s64, compat_ptr(pad));
 280                 else
 281                         err2 = put_compat_semid_ds(&s64, compat_ptr(pad));
 282                 if (err2)
 283                         err = -EFAULT;
 284                 break;
 285
 286         case IPC_SET:
 287                 if (version == IPC_64) {
 288                         err = get_compat_semid64_ds(&s64, compat_ptr(pad));
 289                 } else {
 290                         err = get_compat_semid_ds(&s64, compat_ptr(pad));
 291                 }
 292                 up64 = compat_alloc_user_space(sizeof(s64));
 293                 if (copy_to_user(up64, &s64, sizeof(s64)))
 294                         err = -EFAULT;
 295                 if (err)
 296                         break;
 297
 298                 fourth.__pad = up64;
 299                 err = sys_semctl(first, second, third, fourth);
 300                 break;
 301
 302         default:
 303                 err = -EINVAL;
 304                 break;
 305         }
 306         return err;
 307 }
 308
 309 long compat_sys_msgsnd(int first, int second, int third, void __user *uptr)
 310 {
 311         struct msgbuf __user *p;
 312         struct compat_msgbuf __user *up = uptr;
 313         long type;
 314
 315         if (first < 0)
 316                 return -EINVAL;
 317         if (second < 0 || (second >= MAXBUF - sizeof(struct msgbuf)))
 318                 return -EINVAL;
 319
 320         p = compat_alloc_user_space(second + sizeof(struct msgbuf));
 321         if (get_user(type, &up->mtype) ||
 322             put_user(type, &p->mtype) ||
 323             copy_in_user(p->mtext, up->mtext, second))
 324                 return -EFAULT;
 325
 326         return sys_msgsnd(first, p, second, third);
 327 }
 328
 329 long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
 330                            int version, void __user *uptr)
 331 {
 332         struct msgbuf __user *p;
 333         struct compat_msgbuf __user *up;
 334         long type;
 335         int err;
 336
 337         if (first < 0)
 338                 return -EINVAL;
 339         if (second < 0 || (second >= MAXBUF - sizeof(struct msgbuf)))
 340                 return -EINVAL;
 341
 342         if (!version) {
 343                 struct compat_ipc_kludge ipck;
 344                 err = -EINVAL;
 345                 if (!uptr)
 346                         goto out;
 347                 err = -EFAULT;
 348                 if (copy_from_user (&ipck, uptr, sizeof(ipck)))
 349                         goto out;
 350                 uptr = compat_ptr(ipck.msgp);
 351                 msgtyp = ipck.msgtyp;
 352         }
 353         p = compat_alloc_user_space(second + sizeof(struct msgbuf));
 354         err = sys_msgrcv(first, p, second, msgtyp, third);
 355         if (err < 0)
 356                 goto out;
 357         up = uptr;
 358         if (get_user(type, &p->mtype) ||
 359             put_user(type, &up->mtype) ||
 360             copy_in_user(up->mtext, p->mtext, err))
 361                 err = -EFAULT;
 362 out:
 363         return err;
 364 }
 365
 366 static inline int get_compat_msqid64(struct msqid64_ds *m64,
 367                                      struct compat_msqid64_ds __user *up64)
 368 {
 369         int err;
 370
 371         if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
 372                 return -EFAULT;
 373         err  = __get_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
 374         err |= __get_user(m64->msg_qbytes, &up64->msg_qbytes);
 375         return err;
 376 }
 377
 378 static inline int get_compat_msqid(struct msqid64_ds *m,
 379                                    struct compat_msqid_ds __user *up)
 380 {
 381         int err;
 382
 383         if (!access_ok(VERIFY_READ, up, sizeof(*up)))
 384                 return -EFAULT;
 385         err  = __get_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
 386         err |= __get_user(m->msg_qbytes, &up->msg_qbytes);
 387         return err;
 388 }
 389
 390 static inline int put_compat_msqid64_ds(struct msqid64_ds *m64,
 391                                  struct compat_msqid64_ds __user *up64)
 392 {
 393         int err;
 394
 395         if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
 396                 return -EFAULT;
 397         err  = __put_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
 398         err |= __put_user(m64->msg_stime, &up64->msg_stime);
 399         err |= __put_user(m64->msg_rtime, &up64->msg_rtime);
 400         err |= __put_user(m64->msg_ctime, &up64->msg_ctime);
 401         err |= __put_user(m64->msg_cbytes, &up64->msg_cbytes);
 402         err |= __put_user(m64->msg_qnum, &up64->msg_qnum);
 403         err |= __put_user(m64->msg_qbytes, &up64->msg_qbytes);
 404         err |= __put_user(m64->msg_lspid, &up64->msg_lspid);
 405         err |= __put_user(m64->msg_lrpid, &up64->msg_lrpid);
 406         return err;
 407 }
 408
 409 static inline int put_compat_msqid_ds(struct msqid64_ds *m,
 410                                       struct compat_msqid_ds __user *up)
 411 {
 412         int err;
 413
 414         if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
 415                 return -EFAULT;
 416         err  = __put_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
 417         err |= __put_user(m->msg_stime, &up->msg_stime);
 418         err |= __put_user(m->msg_rtime, &up->msg_rtime);
 419         err |= __put_user(m->msg_ctime, &up->msg_ctime);
 420         err |= __put_user(m->msg_cbytes, &up->msg_cbytes);
 421         err |= __put_user(m->msg_qnum, &up->msg_qnum);
 422         err |= __put_user(m->msg_qbytes, &up->msg_qbytes);
 423         err |= __put_user(m->msg_lspid, &up->msg_lspid);
 424         err |= __put_user(m->msg_lrpid, &up->msg_lrpid);
 425         return err;
 426 }
 427
 428 long compat_sys_msgctl(int first, int second, void __user *uptr)
 429 {
 430         int err, err2;
 431         struct msqid64_ds m64;
 432         int version = compat_ipc_parse_version(&second);
 433         void __user *p;
 434
 435         switch (second & (~IPC_64)) {
 436         case IPC_INFO:
 437         case IPC_RMID:
 438         case MSG_INFO:
 439                 err = sys_msgctl(first, second, uptr);
 440                 break;
 441
 442         case IPC_SET:
 443                 if (version == IPC_64) {
 444                         err = get_compat_msqid64(&m64, uptr);
 445                 } else {
 446                         err = get_compat_msqid(&m64, uptr);
 447                 }
 448                 if (err)
 449                         break;
 450                 p = compat_alloc_user_space(sizeof(m64));
 451                 if (copy_to_user(p, &m64, sizeof(m64)))
 452                         err = -EFAULT;
 453                 else
 454                         err = sys_msgctl(first, second, p);
 455                 break;
 456
 457         case IPC_STAT:
 458         case MSG_STAT:
 459                 p = compat_alloc_user_space(sizeof(m64));
 460                 err = sys_msgctl(first, second, p);
 461                 if (err < 0)
 462                         break;
 463                 if (copy_from_user(&m64, p, sizeof(m64)))
 464                         err2 = -EFAULT;
 465                 else if (version == IPC_64)
 466                         err2 = put_compat_msqid64_ds(&m64, uptr);
 467                 else
 468                         err2 = put_compat_msqid_ds(&m64, uptr);
 469                 if (err2)
 470                         err = -EFAULT;
 471                 break;
 472
 473         default:
 474                 err = -EINVAL;
 475                 break;
 476         }
 477         return err;
 478 }
 479
 480 long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
 481                         void __user *uptr)
 482 {
 483         int err;
 484         unsigned long raddr;
 485         compat_ulong_t __user *uaddr;
 486
 487         if (version == 1)
 488                 return -EINVAL;
 489         err = do_shmat(first, uptr, second, &raddr);
 490         if (err < 0)
 491                 return err;
 492         uaddr = compat_ptr(third);
 493         return put_user(raddr, uaddr);
 494 }
 495
 496 static inline int get_compat_shmid64_ds(struct shmid64_ds *s64,
 497                                         struct compat_shmid64_ds __user *up64)
 498 {
 499         if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
 500                 return -EFAULT;
 501         return __get_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
 502 }
 503
 504 static inline int get_compat_shmid_ds(struct shmid64_ds *s,
 505                                       struct compat_shmid_ds __user *up)
 506 {
 507         if (!access_ok(VERIFY_READ, up, sizeof(*up)))
 508                 return -EFAULT;
 509         return __get_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
 510 }
 511
 512 static inline int put_compat_shmid64_ds(struct shmid64_ds *s64,
 513                                         struct compat_shmid64_ds __user *up64)
 514 {
 515         int err;
 516
 517         if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
 518                 return -EFAULT;
 519         err  = __put_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
 520         err |= __put_user(s64->shm_atime, &up64->shm_atime);
 521         err |= __put_user(s64->shm_dtime, &up64->shm_dtime);
 522         err |= __put_user(s64->shm_ctime, &up64->shm_ctime);
 523         err |= __put_user(s64->shm_segsz, &up64->shm_segsz);
 524         err |= __put_user(s64->shm_nattch, &up64->shm_nattch);
 525         err |= __put_user(s64->shm_cpid, &up64->shm_cpid);
 526         err |= __put_user(s64->shm_lpid, &up64->shm_lpid);
 527         return err;
 528 }
 529
 530 static inline int put_compat_shmid_ds(struct shmid64_ds *s,
 531                                       struct compat_shmid_ds __user *up)
 532 {
 533         int err;
 534
 535         if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
 536                 return -EFAULT;
 537         err  = __put_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
 538         err |= __put_user(s->shm_atime, &up->shm_atime);
 539         err |= __put_user(s->shm_dtime, &up->shm_dtime);
 540         err |= __put_user(s->shm_ctime, &up->shm_ctime);
 541         err |= __put_user(s->shm_segsz, &up->shm_segsz);
 542         err |= __put_user(s->shm_nattch, &up->shm_nattch);
 543         err |= __put_user(s->shm_cpid, &up->shm_cpid);
 544         err |= __put_user(s->shm_lpid, &up->shm_lpid);
 545         return err;
 546 }
 547
 548 static inline int put_compat_shminfo64(struct shminfo64 *smi,
 549                                        struct compat_shminfo64 __user *up64)
 550 {
 551         int err;
 552
 553         if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
 554                 return -EFAULT;
 555         err  = __put_user(smi->shmmax, &up64->shmmax);
 556         err |= __put_user(smi->shmmin, &up64->shmmin);
 557         err |= __put_user(smi->shmmni, &up64->shmmni);
 558         err |= __put_user(smi->shmseg, &up64->shmseg);
 559         err |= __put_user(smi->shmall, &up64->shmall);
 560         return err;
 561 }
 562
 563 static inline int put_compat_shminfo(struct shminfo64 *smi,
 564                                      struct shminfo __user *up)
 565 {
 566         int err;
 567
 568         if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
 569                 return -EFAULT;
 570         err  = __put_user(smi->shmmax, &up->shmmax);
 571         err |= __put_user(smi->shmmin, &up->shmmin);
 572         err |= __put_user(smi->shmmni, &up->shmmni);
 573         err |= __put_user(smi->shmseg, &up->shmseg);
 574         err |= __put_user(smi->shmall, &up->shmall);
 575         return err;
 576 }
 577
 578 static inline int put_compat_shm_info(struct shm_info __user *ip,
 579                                       struct compat_shm_info __user *uip)
 580 {
 581         int err;
 582         struct shm_info si;
 583
 584         if (!access_ok(VERIFY_WRITE, uip, sizeof(*uip)) ||
 585             copy_from_user(&si, ip, sizeof(si)))
 586                 return -EFAULT;
 587         err  = __put_user(si.used_ids, &uip->used_ids);
 588         err |= __put_user(si.shm_tot, &uip->shm_tot);
 589         err |= __put_user(si.shm_rss, &uip->shm_rss);
 590         err |= __put_user(si.shm_swp, &uip->shm_swp);
 591         err |= __put_user(si.swap_attempts, &uip->swap_attempts);
 592         err |= __put_user(si.swap_successes, &uip->swap_successes);
 593         return err;
 594 }
 595
 596 long compat_sys_shmctl(int first, int second, void __user *uptr)
 597 {
 598         void __user *p;
 599         struct shmid64_ds s64;
 600         struct shminfo64 smi;
 601         int err, err2;
 602         int version = compat_ipc_parse_version(&second);
 603
 604         switch (second & (~IPC_64)) {
 605         case IPC_RMID:
 606         case SHM_LOCK:
 607         case SHM_UNLOCK:
 608                 err = sys_shmctl(first, second, uptr);
 609                 break;
 610
 611         case IPC_INFO:
 612                 p = compat_alloc_user_space(sizeof(smi));
 613                 err = sys_shmctl(first, second, p);
 614                 if (err < 0)
 615                         break;
 616                 if (copy_from_user(&smi, p, sizeof(smi)))
 617                         err2 = -EFAULT;
 618                 else if (version == IPC_64)
 619                         err2 = put_compat_shminfo64(&smi, uptr);
 620                 else
 621                         err2 = put_compat_shminfo(&smi, uptr);
 622                 if (err2)
 623                         err = -EFAULT;
 624                 break;
 625
 626
 627         case IPC_SET:
 628                 if (version == IPC_64) {
 629                         err = get_compat_shmid64_ds(&s64, uptr);
 630                 } else {
 631                         err = get_compat_shmid_ds(&s64, uptr);
 632                 }
 633                 if (err)
 634                         break;
 635                 p = compat_alloc_user_space(sizeof(s64));
 636                 if (copy_to_user(p, &s64, sizeof(s64)))
 637                         err = -EFAULT;
 638                 else
 639                         err = sys_shmctl(first, second, p);
 640                 break;
 641
 642         case IPC_STAT:
 643         case SHM_STAT:
 644                 p = compat_alloc_user_space(sizeof(s64));
 645                 err = sys_shmctl(first, second, p);
 646                 if (err < 0)
 647                         break;
 648                 if (copy_from_user(&s64, p, sizeof(s64)))
 649                         err2 = -EFAULT;
 650                 else if (version == IPC_64)
 651                         err2 = put_compat_shmid64_ds(&s64, uptr);
 652                 else
 653                         err2 = put_compat_shmid_ds(&s64, uptr);
 654                 if (err2)
 655                         err = -EFAULT;
 656                 break;
 657
 658         case SHM_INFO:
 659                 p = compat_alloc_user_space(sizeof(struct shm_info));
 660                 err = sys_shmctl(first, second, p);
 661                 if (err < 0)
 662                         break;
 663                 err2 = put_compat_shm_info(p, uptr);
 664                 if (err2)
 665                         err = -EFAULT;
 666                 break;
 667
 668         default:
 669                 err = -EINVAL;
 670                 break;
 671         }
 672         return err;
 673 }
 674
 675 long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
 676                 unsigned nsops, const struct compat_timespec __user *timeout)
 677 {
 678         struct timespec __user *ts64 = NULL;
 679         if (timeout) {
 680                 struct timespec ts;
 681                 ts64 = compat_alloc_user_space(sizeof(*ts64));
 682                 if (get_compat_timespec(&ts, timeout))
 683                         return -EFAULT;
 684                 if (copy_to_user(ts64, &ts, sizeof(ts)))
 685                         return -EFAULT;
 686         }
 687         return sys_semtimedop(semid, tsems, nsops, ts64);
 688 }