linux-kernel - Re: [PATCH] wifi: mt76: Replace strlcpy with strscpy

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Message-ID: <87tttpz6ne.fsf@kernel.org>
Date:   Thu, 27 Jul 2023 19:00:21 +0300
From:   Kalle Valo <kvalo@...nel.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     Felix Fietkau <nbd@....name>,
        Lorenzo Bianconi <lorenzo@...nel.org>,
        Ryder Lee <ryder.lee@...iatek.com>,
        Azeem Shaikh <azeemshaikh38@...il.com>,
        linux-hardening@...r.kernel.org,
        Shayne Chen <shayne.chen@...iatek.com>,
        Sean Wang <sean.wang@...iatek.com>,
        linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH] wifi: mt76: Replace strlcpy with strscpy

Kees Cook <keescook@...omium.org> writes:

> On Mon, 03 Jul 2023 18:12:56 +0000, Azeem Shaikh wrote:
>> strlcpy() reads the entire source buffer first.
>> This read may exceed the destination size limit.
>> This is both inefficient and can lead to linear read
>> overflows if a source string is not NUL-terminated [1].
>> In an effort to remove strlcpy() completely [2], replace
>> strlcpy() here with strscpy().
>> 
>> [...]
>
> Applied, thanks!
>
> [1/1] wifi: mt76: Replace strlcpy with strscpy
>       https://git.kernel.org/kees/c/535c78cbc0c4

Why did you take this? mt76 is in active development so risk of
conflicts is high.

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