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Message-Id: <20220329103416.2376616-1-lv.ruyi@zte.com.cn>
Date: Tue, 29 Mar 2022 10:34:16 +0000
From: cgel.zte@...il.com
To: robdclark@...il.com
Cc: sean@...rly.run, quic_abhinavk@...cinc.com, airlied@...ux.ie,
daniel@...ll.ch, dmitry.baryshkov@...aro.org,
bjorn.andersson@...aro.org, lv.ruyi@....com.cn, greenfoo@....eu,
linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
Zeal Robot <zealci@....com.cn>
Subject: [PATCH] drm: msm: add null pointer check
From: Lv Ruyi <lv.ruyi@....com.cn>
kzalloc is a memory allocation function which can return NULL when some
internal memory errors happen. Add null pointer check to avoid
dereferencing null pointer.
Reported-by: Zeal Robot <zealci@....com.cn>
Signed-off-by: Lv Ruyi <lv.ruyi@....com.cn>
---
drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c b/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c
index 5d2ff6791058..acfe1b31e079 100644
--- a/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c
+++ b/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c
@@ -176,6 +176,8 @@ void msm_disp_snapshot_add_block(struct msm_disp_state *disp_state, u32 len,
va_list va;
new_blk = kzalloc(sizeof(struct msm_disp_state_block), GFP_KERNEL);
+ if (!new_blk)
+ return;
va_start(va, fmt);
--
2.25.1
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