On Sat, Apr 02, 2022 at 11:12:39AM +0200, Oliver Hartkopp wrote:
From: Oliver Hartkopp socketcan@hartkopp.net
commit 3ea566422cbde9610c2734980d1286ab681bb40e upstream.
Syzbot created an environment that lead to a state machine status that can not be reached with a compliant CAN ID address configuration. The provided address information consisted of CAN ID 0x6000001 and 0xC28001 which both boil down to 11 bit CAN IDs 0x001 in sending and receiving.
Sanitize the SFF/EFF CAN ID values before performing the address checks.
Cc: stable@vger.kernel.org # v5.10 - v5.17 Fixes: e057dd3fc20f ("can: add ISO 15765-2:2016 transport protocol") Link: https://lore.kernel.org/all/20220316164258.54155-1-socketcan@hartkopp.net Reported-by: syzbot+2339c27f5c66c652843e@syzkaller.appspotmail.com Signed-off-by: Oliver Hartkopp socketcan@hartkopp.net Signed-off-by: Marc Kleine-Budde mkl@pengutronix.de
net/can/isotp.c | 38 ++++++++++++++++++++------------------ 1 file changed, 20 insertions(+), 18 deletions(-)
Now queued up, thanks.
greg k-h