linux-kernel - [PATCH v2, 2/2] media: mediatek: vcodec: make sure pointer isn't NULL before used

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Message-ID: <20230411055413.539-3-irui.wang@mediatek.com>
Date:   Tue, 11 Apr 2023 13:54:13 +0800
From:   Irui Wang <irui.wang@...iatek.com>
To:     Hans Verkuil <hverkuil-cisco@...all.nl>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>
CC:     <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        <linux-media@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>, <maoguang.meng@...iatek.com>,
        Yunfei Dong <yunfei.dong@...iatek.com>,
        "Irui Wang" <irui.wang@...iatek.com>
Subject: [PATCH v2, 2/2] media: mediatek: vcodec: make sure pointer isn't NULL before used

CERT-C Expression check:
Dereferencing buf, which is known to be NULL, check buf is not NULL
before used.

Signed-off-by: Irui Wang <irui.wang@...iatek.com>
---
 drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c
index d65800a3b89d..db65e77bd373 100644
--- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c
@@ -943,7 +943,7 @@ static int vb2ops_venc_start_streaming(struct vb2_queue *q, unsigned int count)
 		 * FIXME: This check is not needed as only active buffers
 		 * can be marked as done.
 		 */
-		if (buf->state == VB2_BUF_STATE_ACTIVE) {
+		if (buf && buf->state == VB2_BUF_STATE_ACTIVE) {
 			mtk_v4l2_debug(0, "[%d] id=%d, type=%d, %d -> VB2_BUF_STATE_QUEUED",
 					ctx->id, i, q->type,
 					(int)buf->state);
-- 
2.18.0