From: Azeem Shaikh <azeemshaikh38@gmail.com>
To: Maxime Ripard <mripard@kernel.org>, Chen-Yu Tsai <wens@csie.org>
Cc: linux-hardening@vger.kernel.org,
Azeem Shaikh <azeemshaikh38@gmail.com>,
dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
David Airlie <airlied@gmail.com>, Daniel Vetter <daniel@ffwll.ch>,
Jernej Skrabec <jernej.skrabec@gmail.com>,
Samuel Holland <samuel@sholland.org>,
linux-arm-kernel@lists.infradead.org,
linux-sunxi@lists.linux.dev
Subject: [PATCH] drm/sun4i: hdmi: Replace all non-returning strlcpy with strscpy
Date: Mon, 22 May 2023 15:53:31 +0000 [thread overview]
Message-ID: <20230522155331.2336966-1-azeemshaikh38@gmail.com> (raw)
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>
---
drivers/gpu/drm/sun4i/sun4i_hdmi_i2c.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_i2c.c b/drivers/gpu/drm/sun4i/sun4i_hdmi_i2c.c
index c7d7e9fff91c..d1a65a921f5a 100644
--- a/drivers/gpu/drm/sun4i/sun4i_hdmi_i2c.c
+++ b/drivers/gpu/drm/sun4i/sun4i_hdmi_i2c.c
@@ -304,7 +304,7 @@ int sun4i_hdmi_i2c_create(struct device *dev, struct sun4i_hdmi *hdmi)
adap->owner = THIS_MODULE;
adap->class = I2C_CLASS_DDC;
adap->algo = &sun4i_hdmi_i2c_algorithm;
- strlcpy(adap->name, "sun4i_hdmi_i2c adapter", sizeof(adap->name));
+ strscpy(adap->name, "sun4i_hdmi_i2c adapter", sizeof(adap->name));
i2c_set_adapdata(adap, hdmi);
ret = i2c_add_adapter(adap);
next reply other threads:[~2023-05-22 15:53 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-22 15:53 Azeem Shaikh [this message]
2023-05-22 20:16 ` [PATCH] drm/sun4i: hdmi: Replace all non-returning strlcpy with strscpy Kees Cook
2023-05-30 23:06 ` Kees Cook
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