linux-hardening - Re: [PATCH] cfg80211: cfg80211: strlcpy withreturn

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Date:   Wed, 14 Jun 2023 09:46:31 -0400
From:   Azeem Shaikh <azeemshaikh38@...il.com>
To:     Kalle Valo <kvalo@...nel.org>
Cc:     Johannes Berg <johannes@...solutions.net>,
        linux-hardening@...r.kernel.org, linux-wireless@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org
Subject: Re: [PATCH] cfg80211: cfg80211: strlcpy withreturn

On Wed, Jun 14, 2023 at 3:40 AM Kalle Valo <kvalo@...nel.org> wrote:
>
> Azeem Shaikh <azeemshaikh38@...il.com> writes:
>
> > 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().
> >
> > Direct replacement is safe here since WIPHY_ASSIGN is only used by
> > TRACE macros and the return values are ignored.
> >
> > [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy
> > [2] https://github.com/KSPP/linux/issues/89
> >
> > Signed-off-by: Azeem Shaikh <azeemshaikh38@...il.com>
>
> The title should be:
>
> wifi: cfg80211: replace strlcpy() with strlscpy()
>

Ack. Sent out a v2.

> --
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>
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