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

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Date:   Wed, 15 Mar 2023 14:45:44 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Ahmad Fatoum <a.fatoum@...gutronix.de>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Alvin Šipraga <alsi@...g-olufsen.dk>,
        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>,
        Jakub Kicinski <kuba@...nel.org>,
        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, Mar 15, 2023 at 02:35:34PM +0100, Ahmad Fatoum wrote:
> Hello Andrew,
> 
> On 15.03.23 14:30, Andrew Lunn wrote:
> > On Wed, Mar 15, 2023 at 02:09:15PM +0100, Ahmad Fatoum wrote:
> >> The probe function sets priv->chip_data to (void *)priv + sizeof(*priv)
> >> with the expectation that priv has enough trailing space.
> >>
> >> However, only realtek-smi actually allocated this chip_data space.
> >> Do likewise in realtek-mdio to fix out-of-bounds accesses.
> > 
> > Hi Ahmad
> > 
> > It is normal to include a patch 0/X which gives the big picture, what
> > does this patch set do as a whole.
> > 
> > Please try to remember this for the next set you post.
> 
> Ok, will do next time. I didn't include one this time, because there's
> no big picture here; Just two fixes for the same driver.

Fine. You could just say that. Patch 0/X is then used as the merge
commit messages.

       Andrew