aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorVasiliy Kulikov <segooon@gmail.com>2010-10-30 18:22:49 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2010-10-30 08:25:51 -0700
commit3af54c9bd9e6f14f896aac1bb0e8405ae0bc7a44 (patch)
tree74eb7ea6396c3ad00fce944789071ded2e0b85e8
parent504b701bb1655747575095543c083267418e02ac (diff)
downloadlinux-linaro-3af54c9bd9e6f14f896aac1bb0e8405ae0bc7a44.tar.gz
ipc: shm: fix information leak to userland
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> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--ipc/shm.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/ipc/shm.c b/ipc/shm.c
index fd658a1c2b8..7d3bb22a930 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -479,6 +479,7 @@ 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;