diff options
| author | Amanieu d'Antras <amanieu@gmail.com> | 2015-08-06 15:46:33 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-08-07 04:39:40 +0300 |
| commit | 3ead7c52bdb0ab44f4bb1feed505a8323cc12ba7 (patch) | |
| tree | 255fa7484e68697aedfa97658a962dc804ab16f3 /mm/slab_common.c | |
| parent | 26135022f85105ad725cda103fa069e29e83bd16 (diff) | |
| download | lwn-3ead7c52bdb0ab44f4bb1feed505a8323cc12ba7.tar.gz lwn-3ead7c52bdb0ab44f4bb1feed505a8323cc12ba7.zip | |
signalfd: fix information leak in signalfd_copyinfo
This function may copy the si_addr_lsb field to user mode when it hasn'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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/slab_common.c')
0 files changed, 0 insertions, 0 deletions