linux-kernel - Re: [PATCH] drm/display/dp_mst: Replace all non-returning strlcpy with strscpy

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Message-Id: <168548796305.1350188.17508138666156714348.b4-ty@chromium.org>
Date:   Tue, 30 May 2023 16:06:01 -0700
From:   Kees Cook <keescook@...omium.org>
To:     tzimmermann@...e.de, azeemshaikh38@...il.com,
        maarten.lankhorst@...ux.intel.com, mripard@...nel.org
Cc:     Kees Cook <keescook@...omium.org>, linux-kernel@...r.kernel.org,
        imre.deak@...el.com, jani.nikula@...el.com, airlied@...il.com,
        linux-hardening@...r.kernel.org, daniel@...ll.ch, sam@...nborg.org,
        khaled.almahallawy@...el.com, dri-devel@...ts.freedesktop.org,
        alexander.deucher@....com, lyude@...hat.com, jim.cromie@...il.com,
        ville.syrjala@...ux.intel.com, Wayne.Lin@....com
Subject: Re: [PATCH] drm/display/dp_mst: Replace all non-returning strlcpy with strscpy

On Mon, 22 May 2023 15:51:24 +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().
> No return values were used, so direct replacement is safe.
> 
> [...]

Applied to for-next/hardening, thanks!

[1/1] drm/display/dp_mst: Replace all non-returning strlcpy with strscpy
      https://git.kernel.org/kees/c/09c8ecb20243

-- 
Kees Cook