linux-kernel - Re: [PATCH v1] can: j1939: Fix UAF in j1939_sk_match_filter during setsockopt(SO_J1939

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Date:   Thu, 28 Sep 2023 09:38:23 +0200
From:   Oleksij Rempel <o.rempel@...gutronix.de>
To:     Robin van der Gracht <robin@...tonic.nl>,
        Oliver Hartkopp <socketcan@...tkopp.net>,
        Marc Kleine-Budde <mkl@...gutronix.de>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        linux-can@...r.kernel.org, kernel@...gutronix.de,
        Sili Luo <rootlab@...wei.com>
Subject: Re: [PATCH v1] can: j1939: Fix UAF in j1939_sk_match_filter during
 setsockopt(SO_J1939_FILTER)

On Wed, Sep 27, 2023 at 06:14:56PM +0200, Oleksij Rempel wrote:
> Lock jsk->sk to prevent UAF when setsockopt(..., SO_J1939_FILTER, ...)
> modifies jsk->filters while receiving packets.

...

> Fixes: 9d71dd0c70099 ("can: add support of SAE J1939 protocol")
> Reported-by: Sili Luo <rootlab@...wei.com>
> Suggested-by: Sili Luo <rootlab@...wei.com>
> Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
> Acked-by: Oleksij Rempel <o.rempel@...gutronix.de>
> Cc: stable@...r.kernel.org

Tested-by: Sili Luo <rootlab@...wei.com>

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