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authorAmanieu d'Antras <amanieu@gmail.com>2015-08-06 15:46:29 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-08-07 04:39:40 +0300
commit26135022f85105ad725cda103fa069e29e83bd16 (patch)
tree5e4f34c68105b76a88b96c467be46994d70fa5f8 /fs/signalfd.c
parent3c00cb5e68dc719f2fc73a33b1b230aadfcb1309 (diff)
downloadop-kernel-dev-26135022f85105ad725cda103fa069e29e83bd16.zip
op-kernel-dev-26135022f85105ad725cda103fa069e29e83bd16.tar.gz
signal: fix information leak in copy_siginfo_to_user
This function may copy the si_addr_lsb, si_lower and si_upper fields to user mode when they haven't been initialized, which can leak kernel stack data to user mode. Just checking the value of si_code is insufficient because the same si_code value is shared between multiple signals. This is solved by checking the value of si_signo in addition to si_code. Signed-off-by: Amanieu d'Antras <amanieu@gmail.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/signalfd.c')
0 files changed, 0 insertions, 0 deletions
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