forked from mirrors/linux
ipc: move compat shmctl to native
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
parent
9ba720c186
commit
553f770ef7
3 changed files with 231 additions and 235 deletions
233
ipc/compat.c
233
ipc/compat.c
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@ -39,16 +39,6 @@ struct compat_msgbuf {
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char mtext[1];
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};
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struct compat_ipc_perm {
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key_t key;
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__compat_uid_t uid;
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__compat_gid_t gid;
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__compat_uid_t cuid;
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__compat_gid_t cgid;
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compat_mode_t mode;
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unsigned short seq;
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};
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struct compat_semid_ds {
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struct compat_ipc_perm sem_perm;
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compat_time_t sem_otime;
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@ -76,44 +66,12 @@ struct compat_msqid_ds {
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compat_ipc_pid_t msg_lrpid;
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};
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struct compat_shmid_ds {
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struct compat_ipc_perm shm_perm;
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int shm_segsz;
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compat_time_t shm_atime;
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compat_time_t shm_dtime;
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compat_time_t shm_ctime;
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compat_ipc_pid_t shm_cpid;
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compat_ipc_pid_t shm_lpid;
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unsigned short shm_nattch;
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unsigned short shm_unused;
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compat_uptr_t shm_unused2;
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compat_uptr_t shm_unused3;
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};
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struct compat_ipc_kludge {
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compat_uptr_t msgp;
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compat_long_t msgtyp;
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};
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struct compat_shminfo64 {
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compat_ulong_t shmmax;
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compat_ulong_t shmmin;
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compat_ulong_t shmmni;
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compat_ulong_t shmseg;
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compat_ulong_t shmall;
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compat_ulong_t __unused1;
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compat_ulong_t __unused2;
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compat_ulong_t __unused3;
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compat_ulong_t __unused4;
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};
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struct compat_shm_info {
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compat_int_t used_ids;
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compat_ulong_t shm_tot, shm_rss, shm_swp;
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compat_ulong_t swap_attempts, swap_successes;
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};
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static inline int compat_ipc_parse_version(int *cmd)
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static inline int __compat_ipc_parse_version(int *cmd)
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{
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#ifdef CONFIG_ARCH_WANT_COMPAT_IPC_PARSE_VERSION
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int version = *cmd & IPC_64;
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@ -241,7 +199,7 @@ static long do_compat_semctl(int first, int second, int third, u32 pad)
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int err, err2;
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struct semid64_ds sem64;
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struct semid64_ds __user *up64;
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int version = compat_ipc_parse_version(&third);
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int version = __compat_ipc_parse_version(&third);
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memset(&sem64, 0, sizeof(sem64));
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@ -499,7 +457,7 @@ COMPAT_SYSCALL_DEFINE3(msgctl, int, first, int, second, void __user *, uptr)
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{
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int err, err2;
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struct msqid64_ds m64;
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int version = compat_ipc_parse_version(&second);
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int version = __compat_ipc_parse_version(&second);
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void __user *p;
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memset(&m64, 0, sizeof(m64));
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@ -561,191 +519,6 @@ COMPAT_SYSCALL_DEFINE3(shmat, int, shmid, compat_uptr_t, shmaddr, int, shmflg)
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return (long)ret;
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}
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static inline int get_compat_shmid64_ds(struct shmid64_ds *sem64,
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struct compat_shmid64_ds __user *up64)
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{
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if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
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return -EFAULT;
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return __get_compat_ipc64_perm(&sem64->shm_perm, &up64->shm_perm);
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}
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static inline int get_compat_shmid_ds(struct shmid64_ds *s,
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struct compat_shmid_ds __user *up)
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{
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if (!access_ok(VERIFY_READ, up, sizeof(*up)))
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return -EFAULT;
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return __get_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
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}
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static inline int put_compat_shmid64_ds(struct shmid64_ds *sem64,
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struct compat_shmid64_ds __user *up64)
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{
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int err;
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if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
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return -EFAULT;
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err = __put_compat_ipc64_perm(&sem64->shm_perm, &up64->shm_perm);
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err |= __put_user(sem64->shm_atime, &up64->shm_atime);
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err |= __put_user(sem64->shm_dtime, &up64->shm_dtime);
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err |= __put_user(sem64->shm_ctime, &up64->shm_ctime);
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err |= __put_user(sem64->shm_segsz, &up64->shm_segsz);
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err |= __put_user(sem64->shm_nattch, &up64->shm_nattch);
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err |= __put_user(sem64->shm_cpid, &up64->shm_cpid);
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err |= __put_user(sem64->shm_lpid, &up64->shm_lpid);
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return err;
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}
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static inline int put_compat_shmid_ds(struct shmid64_ds *s,
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struct compat_shmid_ds __user *up)
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{
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int err;
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if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
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return -EFAULT;
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err = __put_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
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err |= __put_user(s->shm_atime, &up->shm_atime);
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err |= __put_user(s->shm_dtime, &up->shm_dtime);
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err |= __put_user(s->shm_ctime, &up->shm_ctime);
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err |= __put_user(s->shm_segsz, &up->shm_segsz);
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err |= __put_user(s->shm_nattch, &up->shm_nattch);
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err |= __put_user(s->shm_cpid, &up->shm_cpid);
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err |= __put_user(s->shm_lpid, &up->shm_lpid);
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return err;
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}
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static inline int put_compat_shminfo64(struct shminfo64 *smi,
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struct compat_shminfo64 __user *up64)
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{
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int err;
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if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
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return -EFAULT;
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if (smi->shmmax > INT_MAX)
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smi->shmmax = INT_MAX;
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err = __put_user(smi->shmmax, &up64->shmmax);
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err |= __put_user(smi->shmmin, &up64->shmmin);
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err |= __put_user(smi->shmmni, &up64->shmmni);
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err |= __put_user(smi->shmseg, &up64->shmseg);
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err |= __put_user(smi->shmall, &up64->shmall);
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return err;
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}
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static inline int put_compat_shminfo(struct shminfo64 *smi,
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struct shminfo __user *up)
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{
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int err;
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if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
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return -EFAULT;
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if (smi->shmmax > INT_MAX)
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smi->shmmax = INT_MAX;
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err = __put_user(smi->shmmax, &up->shmmax);
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err |= __put_user(smi->shmmin, &up->shmmin);
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err |= __put_user(smi->shmmni, &up->shmmni);
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err |= __put_user(smi->shmseg, &up->shmseg);
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err |= __put_user(smi->shmall, &up->shmall);
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return err;
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}
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static inline int put_compat_shm_info(struct shm_info __user *ip,
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struct compat_shm_info __user *uip)
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{
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int err;
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struct shm_info si;
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if (!access_ok(VERIFY_WRITE, uip, sizeof(*uip)) ||
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copy_from_user(&si, ip, sizeof(si)))
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return -EFAULT;
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err = __put_user(si.used_ids, &uip->used_ids);
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err |= __put_user(si.shm_tot, &uip->shm_tot);
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err |= __put_user(si.shm_rss, &uip->shm_rss);
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err |= __put_user(si.shm_swp, &uip->shm_swp);
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err |= __put_user(si.swap_attempts, &uip->swap_attempts);
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err |= __put_user(si.swap_successes, &uip->swap_successes);
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return err;
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}
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COMPAT_SYSCALL_DEFINE3(shmctl, int, first, int, second, void __user *, uptr)
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{
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void __user *p;
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struct shmid64_ds sem64;
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struct shminfo64 smi;
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int err, err2;
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int version = compat_ipc_parse_version(&second);
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memset(&sem64, 0, sizeof(sem64));
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switch (second & (~IPC_64)) {
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case IPC_RMID:
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case SHM_LOCK:
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case SHM_UNLOCK:
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err = sys_shmctl(first, second, uptr);
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break;
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case IPC_INFO:
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p = compat_alloc_user_space(sizeof(smi));
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err = sys_shmctl(first, second, p);
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if (err < 0)
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break;
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if (copy_from_user(&smi, p, sizeof(smi)))
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err2 = -EFAULT;
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else if (version == IPC_64)
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err2 = put_compat_shminfo64(&smi, uptr);
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else
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err2 = put_compat_shminfo(&smi, uptr);
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if (err2)
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err = -EFAULT;
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break;
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case IPC_SET:
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if (version == IPC_64)
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err = get_compat_shmid64_ds(&sem64, uptr);
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else
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err = get_compat_shmid_ds(&sem64, uptr);
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if (err)
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break;
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p = compat_alloc_user_space(sizeof(sem64));
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if (copy_to_user(p, &sem64, sizeof(sem64)))
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err = -EFAULT;
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else
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err = sys_shmctl(first, second, p);
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break;
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case IPC_STAT:
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case SHM_STAT:
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p = compat_alloc_user_space(sizeof(sem64));
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err = sys_shmctl(first, second, p);
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if (err < 0)
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break;
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if (copy_from_user(&sem64, p, sizeof(sem64)))
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err2 = -EFAULT;
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else if (version == IPC_64)
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err2 = put_compat_shmid64_ds(&sem64, uptr);
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else
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err2 = put_compat_shmid_ds(&sem64, uptr);
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if (err2)
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err = -EFAULT;
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break;
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case SHM_INFO:
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p = compat_alloc_user_space(sizeof(struct shm_info));
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err = sys_shmctl(first, second, p);
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if (err < 0)
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break;
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err2 = put_compat_shm_info(p, uptr);
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if (err2)
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err = -EFAULT;
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break;
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default:
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err = -EINVAL;
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break;
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}
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return err;
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}
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COMPAT_SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsems,
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unsigned, nsops,
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const struct compat_timespec __user *, timeout)
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209
ipc/shm.c
209
ipc/shm.c
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@ -1030,7 +1030,7 @@ SYSCALL_DEFINE3(shmctl, int, shmid, int, cmd, struct shmid_ds __user *, buf)
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{
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int err, version;
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struct ipc_namespace *ns;
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struct shmid64_ds tbuf;
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struct shmid64_ds sem64;
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if (cmd < 0 || shmid < 0)
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return -EINVAL;
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@ -1059,18 +1059,19 @@ SYSCALL_DEFINE3(shmctl, int, shmid, int, cmd, struct shmid_ds __user *, buf)
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}
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case SHM_STAT:
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case IPC_STAT: {
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err = shmctl_stat(ns, shmid, cmd, &tbuf);
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err = shmctl_stat(ns, shmid, cmd, &sem64);
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if (err < 0)
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return err;
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if (copy_shmid_to_user(buf, &tbuf, version))
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if (copy_shmid_to_user(buf, &sem64, version))
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err = -EFAULT;
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return err;
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}
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case IPC_SET:
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if (copy_shmid_from_user(&tbuf, buf, version))
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if (copy_shmid_from_user(&sem64, buf, version))
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return -EFAULT;
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/* fallthru */
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case IPC_RMID:
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return shmctl_down(ns, shmid, cmd, &tbuf);
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return shmctl_down(ns, shmid, cmd, &sem64);
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case SHM_LOCK:
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case SHM_UNLOCK:
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return shmctl_do_lock(ns, shmid, cmd);
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@ -1079,6 +1080,204 @@ SYSCALL_DEFINE3(shmctl, int, shmid, int, cmd, struct shmid_ds __user *, buf)
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}
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}
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#ifdef CONFIG_COMPAT
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struct compat_shmid_ds {
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struct compat_ipc_perm shm_perm;
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int shm_segsz;
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compat_time_t shm_atime;
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compat_time_t shm_dtime;
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compat_time_t shm_ctime;
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compat_ipc_pid_t shm_cpid;
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compat_ipc_pid_t shm_lpid;
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unsigned short shm_nattch;
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unsigned short shm_unused;
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compat_uptr_t shm_unused2;
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compat_uptr_t shm_unused3;
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};
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struct compat_shminfo64 {
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compat_ulong_t shmmax;
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compat_ulong_t shmmin;
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compat_ulong_t shmmni;
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compat_ulong_t shmseg;
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compat_ulong_t shmall;
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compat_ulong_t __unused1;
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compat_ulong_t __unused2;
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compat_ulong_t __unused3;
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compat_ulong_t __unused4;
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};
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struct compat_shm_info {
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compat_int_t used_ids;
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compat_ulong_t shm_tot, shm_rss, shm_swp;
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compat_ulong_t swap_attempts, swap_successes;
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};
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static int copy_compat_shminfo_to_user(void __user *buf, struct shminfo64 *in,
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int version)
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{
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if (in->shmmax > INT_MAX)
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in->shmmax = INT_MAX;
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if (version == IPC_64) {
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struct compat_shminfo64 info;
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memset(&info, 0, sizeof(info));
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info.shmmax = in->shmmax;
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info.shmmin = in->shmmin;
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info.shmmni = in->shmmni;
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info.shmseg = in->shmseg;
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info.shmall = in->shmall;
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return copy_to_user(buf, &info, sizeof(info));
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} else {
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struct shminfo info;
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memset(&info, 0, sizeof(info));
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info.shmmax = in->shmmax;
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info.shmmin = in->shmmin;
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info.shmmni = in->shmmni;
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info.shmseg = in->shmseg;
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info.shmall = in->shmall;
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return copy_to_user(buf, &info, sizeof(info));
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}
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}
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static int put_compat_shm_info(struct shm_info *ip,
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struct compat_shm_info __user *uip)
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{
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struct compat_shm_info info;
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memset(&info, 0, sizeof(info));
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info.used_ids = ip->used_ids;
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info.shm_tot = ip->shm_tot;
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info.shm_rss = ip->shm_rss;
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info.shm_swp = ip->shm_swp;
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info.swap_attempts = ip->swap_attempts;
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info.swap_successes = ip->swap_successes;
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return copy_to_user(up, &info, sizeof(info));
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}
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static int copy_compat_shmid_to_user(void __user *buf, struct shmid64_ds *in,
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int version)
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{
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if (version == IPC_64) {
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struct compat_shmid64_ds v;
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memset(&v, 0, sizeof(v));
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v.shm_perm.key = in->shm_perm.key;
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v.shm_perm.uid = in->shm_perm.uid;
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v.shm_perm.gid = in->shm_perm.gid;
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v.shm_perm.cuid = in->shm_perm.cuid;
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v.shm_perm.cgid = in->shm_perm.cgid;
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v.shm_perm.mode = in->shm_perm.mode;
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v.shm_perm.seq = in->shm_perm.seq;
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v.shm_atime = in->shm_atime;
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v.shm_dtime = in->shm_dtime;
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v.shm_ctime = in->shm_ctime;
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v.shm_segsz = in->shm_segsz;
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v.shm_nattch = in->shm_nattch;
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v.shm_cpid = in->shm_cpid;
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v.shm_lpid = in->shm_lpid;
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return copy_to_user(buf, &v, sizeof(v));
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} else {
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struct compat_shmid_ds v;
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memset(&v, 0, sizeof(v));
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v.shm_perm.key = in->shm_perm.key;
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SET_UID(v.shm_perm.uid, in->shm_perm.uid);
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SET_GID(v.shm_perm.gid, in->shm_perm.gid);
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SET_UID(v.shm_perm.cuid, in->shm_perm.cuid);
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SET_GID(v.shm_perm.cgid, in->shm_perm.cgid);
|
||||
v.shm_perm.mode = in->shm_perm.mode;
|
||||
v.shm_perm.seq = in->shm_perm.seq;
|
||||
v.shm_atime = in->shm_atime;
|
||||
v.shm_dtime = in->shm_dtime;
|
||||
v.shm_ctime = in->shm_ctime;
|
||||
v.shm_segsz = in->shm_segsz;
|
||||
v.shm_nattch = in->shm_nattch;
|
||||
v.shm_cpid = in->shm_cpid;
|
||||
v.shm_lpid = in->shm_lpid;
|
||||
return copy_to_user(buf, &v, sizeof(v));
|
||||
}
|
||||
}
|
||||
|
||||
static int copy_compat_shmid_from_user(struct shmid64_ds *out, void __user *buf,
|
||||
int version)
|
||||
{
|
||||
memset(out, 0, sizeof(*out));
|
||||
if (version == IPC_64) {
|
||||
struct compat_shmid64_ds *p = buf;
|
||||
struct compat_ipc64_perm v;
|
||||
if (copy_from_user(&v, &p->shm_perm, sizeof(v)))
|
||||
return -EFAULT;
|
||||
out->shm_perm.uid = v.uid;
|
||||
out->shm_perm.gid = v.gid;
|
||||
out->shm_perm.mode = v.mode;
|
||||
} else {
|
||||
struct compat_shmid_ds *p = buf;
|
||||
struct compat_ipc_perm v;
|
||||
if (copy_from_user(&v, &p->shm_perm, sizeof(v)))
|
||||
return -EFAULT;
|
||||
out->shm_perm.uid = v.uid;
|
||||
out->shm_perm.gid = v.gid;
|
||||
out->shm_perm.mode = v.mode;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
COMPAT_SYSCALL_DEFINE3(shmctl, int, shmid, int, cmd, void __user *, uptr)
|
||||
{
|
||||
struct ipc_namespace *ns;
|
||||
struct shmid64_ds sem64;
|
||||
int version = compat_ipc_parse_version(&cmd);
|
||||
int err;
|
||||
|
||||
ns = current->nsproxy->ipc_ns;
|
||||
|
||||
if (cmd < 0 || shmid < 0)
|
||||
return -EINVAL;
|
||||
|
||||
switch (cmd) {
|
||||
case IPC_INFO: {
|
||||
struct shminfo64 shminfo;
|
||||
err = shmctl_ipc_info(ns, &shminfo);
|
||||
if (err < 0)
|
||||
return err;
|
||||
if (copy_compat_shminfo_to_user(uptr, &shminfo, version))
|
||||
err = -EFAULT;
|
||||
return err;
|
||||
}
|
||||
case SHM_INFO: {
|
||||
struct shm_info shm_info;
|
||||
err = shmctl_shm_info(ns, &shm_info);
|
||||
if (err < 0)
|
||||
return err;
|
||||
if (put_compat_shm_info(&shm_info, uptr))
|
||||
err = -EFAULT;
|
||||
return err;
|
||||
}
|
||||
case IPC_STAT:
|
||||
case SHM_STAT:
|
||||
err = shmctl_stat(ns, shmid, cmd, &sem64);
|
||||
if (err < 0)
|
||||
return err;
|
||||
if (copy_compat_shmid_to_user(&sem64, uptr, version))
|
||||
err = -EFAULT;
|
||||
return err;
|
||||
|
||||
case IPC_SET:
|
||||
if (copy_compat_shmid_from_user(&sem64, uptr, version))
|
||||
return -EFAULT;
|
||||
/* fallthru */
|
||||
case IPC_RMID:
|
||||
return shmctl_down(ns, shmid, cmd, &sem64);
|
||||
case SHM_LOCK:
|
||||
case SHM_UNLOCK:
|
||||
return shmctl_do_lock(ns, shmid, cmd);
|
||||
break;
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
return err;
|
||||
}
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Fix shmaddr, allocate descriptor, map shm, add attach descriptor to lists.
|
||||
*
|
||||
|
|
|
|||
24
ipc/util.h
24
ipc/util.h
|
|
@ -191,4 +191,28 @@ int ipcget(struct ipc_namespace *ns, struct ipc_ids *ids,
|
|||
const struct ipc_ops *ops, struct ipc_params *params);
|
||||
void free_ipcs(struct ipc_namespace *ns, struct ipc_ids *ids,
|
||||
void (*free)(struct ipc_namespace *, struct kern_ipc_perm *));
|
||||
|
||||
#ifdef CONFIG_COMPAT
|
||||
#include <linux/compat.h>
|
||||
struct compat_ipc_perm {
|
||||
key_t key;
|
||||
__compat_uid_t uid;
|
||||
__compat_gid_t gid;
|
||||
__compat_uid_t cuid;
|
||||
__compat_gid_t cgid;
|
||||
compat_mode_t mode;
|
||||
unsigned short seq;
|
||||
};
|
||||
|
||||
static inline int compat_ipc_parse_version(int *cmd)
|
||||
{
|
||||
#ifdef CONFIG_ARCH_WANT_COMPAT_IPC_PARSE_VERSION
|
||||
int version = *cmd & IPC_64;
|
||||
*cmd &= ~IPC_64;
|
||||
return version;
|
||||
#else
|
||||
return IPC_64;
|
||||
#endif
|
||||
}
|
||||
#endif
|
||||
#endif
|
||||
|
|
|
|||
Loading…
Reference in a new issue