From: Kees Cook <keescook@chromium.org>
To: Azeem Shaikh <azeemshaikh38@gmail.com>
Cc: "Andrzej Hajda" <andrzej.hajda@intel.com>,
"Neil Armstrong" <neil.armstrong@linaro.org>,
"Robert Foss" <rfoss@kernel.org>,
linux-hardening@vger.kernel.org,
"Laurent Pinchart" <Laurent.pinchart@ideasonboard.com>,
"Jonas Karlman" <jonas@kwiboo.se>,
"Jernej Skrabec" <jernej.skrabec@gmail.com>,
linux-kernel@vger.kernel.org, "David Airlie" <airlied@gmail.com>,
"Daniel Vetter" <daniel@ffwll.ch>,
"Ville Syrjälä" <ville.syrjala@linux.intel.com>,
"Maxime Ripard" <maxime@cerno.tech>,
"Lucas Stach" <l.stach@pengutronix.de>,
"Guillaume BRUN" <the.cheaterman@gmail.com>,
dri-devel@lists.freedesktop.org
Subject: Re: [PATCH] drm/bridge: dw-hdmi: Replace all non-returning strlcpy with strscpy
Date: Mon, 22 May 2023 13:15:30 -0700 [thread overview]
Message-ID: <202305221315.8E1A18B4A@keescook> (raw)
In-Reply-To: <20230522155210.2336690-1-azeemshaikh38@gmail.com>
On Mon, May 22, 2023 at 03:52:10PM +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.
>
> [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@gmail.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
--
Kees Cook
next prev parent reply other threads:[~2023-05-22 20:15 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-22 15:52 [PATCH] drm/bridge: dw-hdmi: Replace all non-returning strlcpy with strscpy Azeem Shaikh
2023-05-22 20:15 ` Kees Cook [this message]
2023-05-23 17:21 ` rfoss
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