netdev - Re: [net-next] can: isotp: sanitize CAN ID checks in isotp

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Message-ID: <20220316074515.jchjdelc722dkug7@pengutronix.de>
Date:   Wed, 16 Mar 2022 08:45:15 +0100
From:   Marc Kleine-Budde <mkl@...gutronix.de>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     Oliver Hartkopp <socketcan@...tkopp.net>, netdev@...r.kernel.org,
        syzbot+2339c27f5c66c652843e@...kaller.appspotmail.com
Subject: Re: [net-next] can: isotp: sanitize CAN ID checks in isotp_bind()

On 15.03.2022 18:51:34, Jakub Kicinski wrote:
> On Tue, 15 Mar 2022 21:37:48 +0100 Oliver Hartkopp wrote:
> > 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.
> > 
> > Fixes: e057dd3fc20f ("can: add ISO 15765-2:2016 transport protocol")
> > Reported-by: syzbot+2339c27f5c66c652843e@...kaller.appspotmail.com
> > Signed-off-by: Oliver Hartkopp <socketcan@...tkopp.net>
> 
> CC Marc, please make sure you CC maintainers.

Thx. And make sure you have the linux-can ML on Cc :)

regards,
Marc

-- 
Pengutronix e.K.                 | Marc Kleine-Budde           |
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