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drm/msm/dpu: check for null return of devm_kzalloc() in dpu_writeback_init()

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Because of the possilble failure of devm_kzalloc(), dpu_wb_conn might
be NULL and will cause null pointer dereference later.

Therefore, it might be better to check it and directly return -ENOMEM.

Fixes: 77b001acdc ("drm/msm/dpu: add the writeback connector layer")
Signed-off-by: Hui Tang <tanghui20@huawei.com>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/512277/
Link: https://lore.kernel.org/r/20221119055518.179937-1-tanghui20@huawei.com
[DB: fixed typo in commit message]
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
This commit is contained in:
Hui Tang
2022-11-19 13:55:18 +08:00
committed by Dmitry Baryshkov
parent a685d27f22
commit 21e9a838f5
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c
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@@ -70,6 +70,8 @@ int dpu_writeback_init(struct drm_device *dev, struct drm_encoder *enc,
int rc = 0;
dpu_wb_conn = devm_kzalloc(dev->dev, sizeof(*dpu_wb_conn), GFP_KERNEL);
if (!dpu_wb_conn)
return -ENOMEM;
drm_connector_helper_add(&dpu_wb_conn->base.base, &dpu_wb_conn_helper_funcs);