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| author |   Kees Cook <keescook@chromium.org> | 2012-10-19 13:56:51 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-19 14:07:47 -0700 |
| commit | 2702b1526c7278c4d65d78de209a465d4de2885e (patch) | |
| tree | a41af3d56a6e37af19bc7ed392f2580750ba86cb /drivers/video/backlight/lm3639_bl.c | |
| parent | linux/coredump.h needs asm/siginfo.h (diff) | |
| download | linux-dev-2702b1526c7278c4d65d78de209a465d4de2885e.tar.xz linux-dev-2702b1526c7278c4d65d78de209a465d4de2885e.zip | |
kernel/sys.c: fix stack memory content leak via UNAME26
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>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions