diff options
| author | Kees Cook <keescook@chromium.org> | 2012-10-19 13:56:51 -0700 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2012-10-30 23:26:53 +0000 |
| commit | 3042c7c2ee52f0ebfc8e09bc2c4cdbff3fc4ec61 (patch) | |
| tree | 5c3c3eaaee868586ae1c1631355b6618b9315928 /arch/arm | |
| parent | cab128d34ceeff27e4c0bc0ffbff213a3baedb93 (diff) | |
kernel/sys.c: fix stack memory content leak via UNAME26
commit 2702b1526c7278c4d65d78de209a465d4de2885e upstream.
Calling uname() with the UNAME26 personality set allows a leak of kernel
stack contents. This fixes it by defensively calculating the length of
copy_to_user() call, making the len argument unsigned, and initializing
the stack buffer to zero (now technically unneeded, but hey, overkill).
CVE-2012-0957
Reported-by: PaX Team <pageexec@freemail.hu>
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: PaX Team <pageexec@freemail.hu>
Cc: Brad Spengler <spender@grsecurity.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'arch/arm')
0 files changed, 0 insertions, 0 deletions