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Message-ID: <20221205095115.2905090-1-ruanjinjie@huawei.com>
Date: Mon, 5 Dec 2022 17:51:15 +0800
From: ruanjinjie <ruanjinjie@...wei.com>
To: <chunkuang.hu@...nel.org>, <p.zabel@...gutronix.de>,
<airlied@...il.com>, <daniel@...ll.ch>, <matthias.bgg@...il.com>,
<seanpaul@...omium.org>, <ck.hu@...iatek.com>,
<dri-devel@...ts.freedesktop.org>,
<linux-mediatek@...ts.infradead.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>
CC: <ruanjinjie@...wei.com>
Subject: [PATCH] drm/mediatek: mtk_drm_crtc: Add checks for devm_kcalloc
As the devm_kcalloc may return NULL, the return value needs to be checked
to avoid NULL poineter dereference.
Fixes: 31c5558dae05 ("drm/mediatek: Refactor plane init")
Signed-off-by: ruanjinjie <ruanjinjie@...wei.com>
---
drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index 112615817dcb..5071f1263216 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -945,6 +945,8 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
mtk_crtc->planes = devm_kcalloc(dev, num_comp_planes,
sizeof(struct drm_plane), GFP_KERNEL);
+ if (!mtk_crtc->planes)
+ return -ENOMEM;
for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
ret = mtk_drm_crtc_init_comp_planes(drm_dev, mtk_crtc, i,
--
2.25.1
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