| Date | Tue, 07 Dec 2010 16:43:37 -0800 | From | Greg KH <> | Subject | [031/127] ipc: shm: fix information leak to userland |
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2.6.32-stable review patch. If anyone has any objections, please let us know.
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From: Vasiliy Kulikov <segooon@gmail.com>
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: Greg Kroah-Hartman <gregkh@suse.de>
--- ipc/shm.c | 1 + 1 file changed, 1 insertion(+)
--- a/ipc/shm.c +++ b/ipc/shm.c @@ -474,6 +474,7 @@ static inline unsigned long copy_shmid_t { 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;
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