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authorAmanieu d'Antras <amanieu@gmail.com>2015-08-06 15:46:29 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-08-16 20:52:26 -0700
commitc08a75d950725cdd87c19232a5a3850c51520359 (patch)
treebb660703a15a30810bc0ff069d77600afb607dc2 /lib/int_sqrt.c
parent8a97f0e58abc93f67f1f6ca571e4ff758739cedf (diff)
signal: fix information leak in copy_siginfo_to_user
commit 26135022f85105ad725cda103fa069e29e83bd16 upstream. 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'lib/int_sqrt.c')
0 files changed, 0 insertions, 0 deletions