diff options
| author | Vasiliy Kulikov <segooon@gmail.com> | 2010-10-30 18:22:49 +0400 |
|---|---|---|
| committer | Paul Gortmaker <paul.gortmaker@windriver.com> | 2011-04-17 16:15:41 -0400 |
| commit | 3a0d44ddfa469f86c16c8daf005a372b19ea1f9e (patch) | |
| tree | 2a9867e642a9b008292498ddf17f5cc69887cf0d /ipc | |
| parent | 5819449cad881107f3fd52025b7a0f5134ab1c85 (diff) | |
ipc: shm: fix information leak to userland
commit 3af54c9bd9e6f14f896aac1bb0e8405ae0bc7a44 upstream.
The shmid_ds structure is copied to userland with shm_unused{,2,3}
fields unitialized. It leads to leaking of contents of kernel stack
memory.
Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
Acked-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Diffstat (limited to 'ipc')
| -rw-r--r-- | ipc/shm.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/ipc/shm.c b/ipc/shm.c index 1a314c89f93c..2225a773740b 100644 --- a/ipc/shm.c +++ b/ipc/shm.c @@ -476,6 +476,7 @@ static inline unsigned long copy_shmid_to_user(void __user *buf, struct shmid64_ { struct shmid_ds out; + memset(&out, 0, sizeof(out)); ipc64_perm_to_ipc_perm(&in->shm_perm, &out.shm_perm); out.shm_segsz = in->shm_segsz; out.shm_atime = in->shm_atime; |