Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Subject: Re: [PATCH 0/2] prevent potential access of uninitialized members in
 can_rcv() and canfd_rcv()
To:     Anant Thazhemadam <anant.thazhemadam@gmail.com>,
        socketcan@hartkopp.net, davem@davemloft.net, kuba@kernel.org
Cc:     linux-can@vger.kernel.org, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org
References: <20201103213906.24219-1-anant.thazhemadam@gmail.com>
From:   Marc Kleine-Budde <mkl@pengutronix.de>
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Message-ID: <794cd63d-b0cb-2cc9-199c-d18724852db6@pengutronix.de>
Date:   Tue, 3 Nov 2020 23:17:40 +0100
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In-Reply-To: <20201103213906.24219-1-anant.thazhemadam@gmail.com>
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From: Marc Kleine-Budde <mkl@pengutronix.de>
To: Anant Thazhemadam <anant.thazhemadam@gmail.com>, socketcan@hartkopp.net,
 davem@davemloft.net, kuba@kernel.org
Cc: linux-can@vger.kernel.org, netdev@vger.kernel.org,
 linux-kernel@vger.kernel.org
Message-ID: <794cd63d-b0cb-2cc9-199c-d18724852db6@pengutronix.de>
Subject: Re: [PATCH 0/2] prevent potential access of uninitialized members in
 can_rcv() and canfd_rcv()
References: <20201103213906.24219-1-anant.thazhemadam@gmail.com>
In-Reply-To: <20201103213906.24219-1-anant.thazhemadam@gmail.com>

--9XYUBXvVXEpFimu1vm1NDXcF0m5tGs2P8
Content-Type: text/plain; charset=utf-8
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Content-Transfer-Encoding: quoted-printable

On 11/3/20 10:39 PM, Anant Thazhemadam wrote:
> In both can_rcv(), and canfd_rcv(), when skb->len =3D 0, cfd->len=20
> (which is uninitialized) is accessed by pr_warn_once().
>=20
> Performing the validation check for cfd->len separately, after the=20
> validation check for skb->len is done, resolves this issue in both=20
> instances, without compromising the degree of detail provided in the
> log messages.
>=20
> Anant Thazhemadam (2):
>   can: af_can: prevent potential access of uninitialized member in
>     can_rcv()
>   can: af_can: prevent potential access of uninitialized member in
>     canfd_rcv()
>=20
>  net/can/af_can.c | 38 ++++++++++++++++++++++++++++----------
>  1 file changed, 28 insertions(+), 10 deletions(-)
>=20

Applied both to linux-can/testing

Tnx,
Marc

--=20
Pengutronix e.K.                 | Marc Kleine-Budde           |
Embedded Linux                   | https://www.pengutronix.de  |
Vertretung West/Dortmund         | Phone: +49-231-2826-924     |
Amtsgericht Hildesheim, HRA 2686 | Fax:   +49-5121-206917-5555 |


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