linux-kernel - Re: [PATCH][next] can: etas_es58x: Fix potential null pointer dereference on pointer cf

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Date:   Thu, 15 Apr 2021 10:12:44 +0100
From:   Colin Ian King <colin.king@...onical.com>
To:     Marc Kleine-Budde <mkl@...gutronix.de>
Cc:     Wolfgang Grandegger <wg@...ndegger.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Vincent Mailhol <mailhol.vincent@...adoo.fr>,
        Arunachalam Santhanam <arunachalam.santhanam@...bosch.com>,
        linux-can@...r.kernel.org, netdev@...r.kernel.org,
        kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH][next] can: etas_es58x: Fix potential null pointer
 dereference on pointer cf

On 15/04/2021 10:03, Marc Kleine-Budde wrote:
> On 15.04.2021 09:55:35, Colin King wrote:
>> From: Colin Ian King <colin.king@...onical.com>
>>
>> The pointer cf is being null checked earlier in the code, however the
>> update of the rx_bytes statistics is dereferencing cf without null
>> checking cf.  Fix this by moving the statement into the following code
>> block that has a null cf check.
>>
>> Addresses-Coverity: ("Dereference after null check")
>> Fixes: 8537257874e9 ("can: etas_es58x: add core support for ETAS ES58X CAN USB interfaces")
>> Signed-off-by: Colin Ian King <colin.king@...onical.com>
> 
> A somewhat different fix is already in net-next/master
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/commit/?id=e2b1e4b532abdd39bfb7313146153815e370d60c

+1 on that

> 
> Marc
>