diff options
| author | Al Viro <viro@zeniv.linux.org.uk> | 2017-07-09 16:10:32 +0200 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2017-07-16 02:46:45 +0200 |
| commit | 28327fae62b011216026b66299882c53b95b4500 (patch) | |
| tree | a5d0dc678591875f06f45c88cdbbb98c9a0cf8ba /ipc/shm.c | |
| parent | semctl(): move compat to native (diff) | |
| download | linux-28327fae62b011216026b66299882c53b95b4500.tar.xz linux-28327fae62b011216026b66299882c53b95b4500.zip | |
ipc: make use of compat ipc_perm helpers
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to '')
| -rw-r--r-- | ipc/shm.c | 30 |
1 files changed, 4 insertions, 26 deletions
diff --git a/ipc/shm.c b/ipc/shm.c index 87334ee3acb3..2e31545035a6 100644 --- a/ipc/shm.c +++ b/ipc/shm.c @@ -1161,13 +1161,7 @@ static int copy_compat_shmid_to_user(void __user *buf, struct shmid64_ds *in, if (version == IPC_64) { struct compat_shmid64_ds v; memset(&v, 0, sizeof(v)); - v.shm_perm.key = in->shm_perm.key; - v.shm_perm.uid = in->shm_perm.uid; - v.shm_perm.gid = in->shm_perm.gid; - v.shm_perm.cuid = in->shm_perm.cuid; - v.shm_perm.cgid = in->shm_perm.cgid; - v.shm_perm.mode = in->shm_perm.mode; - v.shm_perm.seq = in->shm_perm.seq; + to_compat_ipc64_perm(&v.shm_perm, &in->shm_perm); v.shm_atime = in->shm_atime; v.shm_dtime = in->shm_dtime; v.shm_ctime = in->shm_ctime; @@ -1179,13 +1173,8 @@ static int copy_compat_shmid_to_user(void __user *buf, struct shmid64_ds *in, } else { struct compat_shmid_ds v; memset(&v, 0, sizeof(v)); + to_compat_ipc_perm(&v.shm_perm, &in->shm_perm); v.shm_perm.key = in->shm_perm.key; - SET_UID(v.shm_perm.uid, in->shm_perm.uid); - SET_GID(v.shm_perm.gid, in->shm_perm.gid); - SET_UID(v.shm_perm.cuid, in->shm_perm.cuid); - 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; @@ -1203,22 +1192,11 @@ static int copy_compat_shmid_from_user(struct shmid64_ds *out, void __user *buf, 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; + return get_compat_ipc64_perm(&out->shm_perm, &p->shm_perm); } 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 get_compat_ipc_perm(&out->shm_perm, &p->shm_perm); } - return 0; } COMPAT_SYSCALL_DEFINE3(shmctl, int, shmid, int, cmd, void __user *, uptr) |