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| author | Norbert Slusarek <nslusarek@gmx.net> | 2021-06-12 22:18:54 +0200 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2021-06-30 08:48:22 -0400 |
| commit | 8899857d7e450805e6410de5004126491f197146 (patch) | |
| tree | 9675ee8b4d4c52b65f9adbce9ffa55c13605b1e1 /COPYING | |
| parent | e6a1d16ee37c60fc30272f88ac99bf34cd9de277 (diff) | |
| download | linux-stable-8899857d7e450805e6410de5004126491f197146.tar.gz linux-stable-8899857d7e450805e6410de5004126491f197146.tar.bz2 linux-stable-8899857d7e450805e6410de5004126491f197146.zip | |
can: bcm: fix infoleak in struct bcm_msg_head
commit 5e87ddbe3942e27e939bdc02deb8579b0cbd8ecc upstream.
On 64-bit systems, struct bcm_msg_head has an added padding of 4 bytes between
struct members count and ival1. Even though all struct members are initialized,
the 4-byte hole will contain data from the kernel stack. This patch zeroes out
struct bcm_msg_head before usage, preventing infoleaks to userspace.
Fixes: ffd980f976e7 ("[CAN]: Add broadcast manager (bcm) protocol")
Link: https://lore.kernel.org/r/trinity-7c1b2e82-e34f-4885-8060-2cd7a13769ce-1623532166177@3c-app-gmx-bs52
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Norbert Slusarek <nslusarek@gmx.net>
Acked-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'COPYING')
0 files changed, 0 insertions, 0 deletions