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authorKees Cook <keescook@chromium.org>2012-10-19 13:56:51 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-19 14:07:47 -0700
commit2702b1526c7278c4d65d78de209a465d4de2885e (patch)
treea41af3d56a6e37af19bc7ed392f2580750ba86cb /lib/btree.c
parent1d46e232f8637f31f8df2e50b27fd20d8135bd93 (diff)
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 'lib/btree.c')
0 files changed, 0 insertions, 0 deletions