diff options
| author | Oliver Hartkopp <socketcan@hartkopp.net> | 2019-12-07 19:34:18 +0100 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2020-01-02 15:34:27 +0100 |
| commit | e7153bf70c3496bac00e7e4f395bb8d8394ac0ea (patch) | |
| tree | 916e307b02f8f88d6db4ce4878104be0f4cd31f4 /drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c | |
| parent | 93bdc0eb0b4bb5e7094fd4a95f4a394e4a927e09 (diff) | |
can: can_dropped_invalid_skb(): ensure an initialized headroom in outgoing CAN sk_buffs
KMSAN sysbot detected a read access to an untinitialized value in the
headroom of an outgoing CAN related sk_buff. When using CAN sockets this
area is filled appropriately - but when using a packet socket this
initialization is missing.
The problematic read access occurs in the CAN receive path which can
only be triggered when the sk_buff is sent through a (virtual) CAN
interface. So we check in the sending path whether we need to perform
the missing initializations.
Fixes: d3b58c47d330d ("can: replace timestamp as unique skb attribute")
Reported-by: syzbot+b02ff0707a97e4e79ebb@syzkaller.appspotmail.com
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Tested-by: Oliver Hartkopp <socketcan@hartkopp.net>
Cc: linux-stable <stable@vger.kernel.org> # >= v4.1
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c')
0 files changed, 0 insertions, 0 deletions