linux-kernel - [PATCH] drm/mediatek: mtk_drm_drv: switch to use devm_kmemdup

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Message-ID: <20250819172526465q0DlaK4mMznBXD0SIjXKm@zte.com.cn>
Date: Tue, 19 Aug 2025 17:25:26 +0800 (CST)
From: <zhang.enpei@....com.cn>
To: <chunkuang.hu@...nel.org>
Cc: <p.zabel@...gutronix.de>, <airlied@...il.com>, <simona@...ll.ch>,
        <matthias.bgg@...il.com>, <angelogioacchino.delregno@...labora.com>,
        <dri-devel@...ts.freedesktop.org>,
        <linux-mediatek@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: [PATCH] drm/mediatek: mtk_drm_drv: switch to use devm_kmemdup_array()

From: Zhang Enpei <zhang.enpei@....com.cn>

Use devm_kmemdup_array() to avoid multiplication or possible overflows.

Signed-off-by: Zhang Enpei <zhang.enpei@....com.cn>
---
 drivers/gpu/drm/mediatek/mtk_drm_drv.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index d5e6bab36414..e700c0f0a3a2 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -1003,7 +1003,8 @@ static int mtk_drm_of_ddp_path_build_one(struct device *dev, enum mtk_crtc_path
                return -EINVAL;
        }

-       final_ddp_path = devm_kmemdup(dev, temp_path, idx * sizeof(temp_path[0]), GFP_KERNEL);
+       final_ddp_path = devm_kmemdup_array(dev, temp_path, idx,
+                                           sizeof(*temp_path), GFP_KERNEL);
        if (!final_ddp_path)
                return -ENOMEM;

-- 
2.25.1