netdev - Re: [PATCH net 1/2] net: dsa: realtek: fix out-of-bounds access

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20230316210736.1910b195@kernel.org>
Date:   Thu, 16 Mar 2023 21:07:36 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Ahmad Fatoum <a.fatoum@...gutronix.de>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Alvin Šipraga <alsi@...g-olufsen.dk>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        Luiz Angelo Daros de Luca <luizluca@...il.com>,
        "David S. Miller" <davem@...emloft.net>, kernel@...gutronix.de,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net 1/2] net: dsa: realtek: fix out-of-bounds access

On Wed, 15 Mar 2023 14:09:15 +0100 Ahmad Fatoum wrote:
> -	priv = devm_kzalloc(&mdiodev->dev, sizeof(*priv), GFP_KERNEL);
> +	priv = devm_kzalloc(&mdiodev->dev, sizeof(*priv) + var->chip_data_sz, GFP_KERNEL);

size_add() ?
Otherwise some static checker is going to soon send us a patch saying
this can overflow. Let's save ourselves the hassle.