linux-hardening - Re: [PATCH] drm/sun4i: hdmi: Replace all non-returning strlcpy with strscpy

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Message-Id: <168548796308.1350188.7857893772168629136.b4-ty@chromium.org>
Date:   Tue, 30 May 2023 16:06:05 -0700
From:   Kees Cook <keescook@...omium.org>
To:     azeemshaikh38@...il.com, mripard@...nel.org, wens@...e.org
Cc:     Kees Cook <keescook@...omium.org>, linux-kernel@...r.kernel.org,
        jernej.skrabec@...il.com, linux-sunxi@...ts.linux.dev,
        linux-hardening@...r.kernel.org, daniel@...ll.ch,
        samuel@...lland.org, linux-arm-kernel@...ts.infradead.org,
        dri-devel@...ts.freedesktop.org, airlied@...il.com
Subject: Re: [PATCH] drm/sun4i: hdmi: Replace all non-returning strlcpy with strscpy

On Mon, 22 May 2023 15:53:31 +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/sun4i: hdmi: Replace all non-returning strlcpy with strscpy
      https://git.kernel.org/kees/c/6036094a9380

-- 
Kees Cook