[PATCH] drm/mediatek: Replace all non-returning strlcpy with strscpy

From: Azeem Shaikh
Date: Mon May 22 2023 - 11:53:15 EST


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@xxxxxxxxx>
---
drivers/gpu/drm/mediatek/mtk_hdmi_ddc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi_ddc.c b/drivers/gpu/drm/mediatek/mtk_hdmi_ddc.c
index 2fc9214ffa82..4d39ea0a05ca 100644
--- a/drivers/gpu/drm/mediatek/mtk_hdmi_ddc.c
+++ b/drivers/gpu/drm/mediatek/mtk_hdmi_ddc.c
@@ -295,7 +295,7 @@ static int mtk_hdmi_ddc_probe(struct platform_device *pdev)
return ret;
}

- strlcpy(ddc->adap.name, "mediatek-hdmi-ddc", sizeof(ddc->adap.name));
+ strscpy(ddc->adap.name, "mediatek-hdmi-ddc", sizeof(ddc->adap.name));
ddc->adap.owner = THIS_MODULE;
ddc->adap.class = I2C_CLASS_DDC;
ddc->adap.algo = &mtk_hdmi_ddc_algorithm;