Re: [PATCH] cfg80211: cfg80211: strlcpy withreturn

From: Azeem Shaikh
Date: Wed Jun 14 2023 - 09:46:53 EST


On Wed, Jun 14, 2023 at 3:40 AM Kalle Valo <kvalo@xxxxxxxxxx> wrote:
>
> Azeem Shaikh <azeemshaikh38@xxxxxxxxx> 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@xxxxxxxxx>
>
> The title should be:
>
> wifi: cfg80211: replace strlcpy() with strlscpy()
>

Ack. Sent out a v2.

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