linux-kernel - [PATCH 0/1] Fix access violation in mtk_drm_crtc_dma_dev

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Message-ID: <20231110012914.14884-1-stuart.lee@mediatek.com>
Date:   Fri, 10 Nov 2023 09:29:13 +0800
From:   Stuart Lee <stuart.lee@...iatek.com>
To:     Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
CC:     Philipp Zabel <p.zabel@...gutronix.de>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Matthias Brugger <matthias.bgg@...il.com>,
        "Nancy . Lin" <nancy.lin@...iatek.com>,
        <dri-devel@...ts.freedesktop.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Stuart Lee <stuart.lee@...iatek.com>,
        Lancelot Wu <lancelot.wu@...iatek.com>,
        Shawn Sung <shawn.sung@...iatek.com>,
        Pablo Sun <pablo.sun@...iatek.com>,
        Macpaul Lin <macpaul.lin@...iatek.com>
Subject: [PATCH 0/1] Fix access violation in mtk_drm_crtc_dma_dev_get

Add error handling to check NULL input in
mtk_drm_crtc_dma_dev_get function.

While display path is not configured correctly, none of crtc is
established. So the caller of mtk_drm_crtc_dma_dev_get may pass
input parameter *crtc as NULL, Which may cause coredump when
we try to get the container of NULL pointer.

Stuart Lee (1):
  drm/mediatek: Fix access violation in mtk_drm_crtc_dma_dev_get

 drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

-- 
2.18.0