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Date:   Thu, 2 Dec 2021 16:35:43 +0100
From:   Greg KH <gregkh@linuxfoundation.org>
To:     Oleksij Rempel <o.rempel@pengutronix.de>
Cc:     stable@vger.kernel.org,
        Zhang Changzhong <zhangchangzhong@huawei.com>,
        Marc Kleine-Budde <mkl@pengutronix.de>
Subject: Re: [PATCH v1] can: j1939: j1939_tp_cmd_recv(): check the dst
 address of TP.CM_BAM
Message-ID: <Yajnz5OhwHyCfFaq@kroah.com>
References: <20211201102549.3079360-1-o.rempel@pengutronix.de>
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On Wed, Dec 01, 2021 at 11:25:49AM +0100, Oleksij Rempel wrote:
> From: Zhang Changzhong <zhangchangzhong@huawei.com>
> 
> commit 164051a6ab5445bd97f719f50b16db8b32174269 upstream.
> 
> The TP.CM_BAM message must be sent to the global address [1], so add a
> check to drop TP.CM_BAM sent to a non-global address.
> 
> Without this patch, the receiver will treat the following packets as
> normal RTS/CTS transport:
> 18EC0102#20090002FF002301
> 18EB0102#0100000000000000
> 18EB0102#020000FFFFFFFFFF
> 
> [1] SAE-J1939-82 2015 A.3.3 Row 1.
> 
> Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol")
> Link: https://lore.kernel.org/all/1635431907-15617-4-git-send-email-zhangchangzhong@huawei.com
> Cc: stable@vger.kernel.org
> Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
> Acked-by: Oleksij Rempel <o.rempel@pengutronix.de>
> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
> ---
> changes:
>  - rebase against v5.10.82

Now queued up, thanks!  Can you also do this for 5.4.y?

greg k-h