diff options
| author | Amanieu d'Antras <amanieu@gmail.com> | 2015-08-06 15:46:33 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-08-16 20:51:42 -0700 |
| commit | 5c233bffdb9ffd2c85d1f94ddd8be956ee2b353f (patch) | |
| tree | 2ec9e8f6751dd9b550f75d12e2f928e95605fc59 /kernel | |
| parent | 22ab6a2be78db078b11cc478bfc99cdc8e0642cb (diff) | |
signalfd: fix information leak in signalfd_copyinfo
commit 3ead7c52bdb0ab44f4bb1feed505a8323cc12ba7 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions