linux-kernel - [PATCH] meson: vdec: fix possible refcount leak in vdec

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Message-Id: <20220906074630.35779-1-hbh25y@gmail.com>
Date:   Tue,  6 Sep 2022 15:46:30 +0800
From:   Hangyu Hua <hbh25y@...il.com>
To:     narmstrong@...libre.com, mchehab@...nel.org,
        gregkh@...uxfoundation.org, khilman@...libre.com,
        jbrunet@...libre.com, martin.blumenstingl@...glemail.com
Cc:     linux-media@...r.kernel.org, linux-amlogic@...ts.infradead.org,
        linux-staging@...ts.linux.dev,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Hangyu Hua <hbh25y@...il.com>
Subject: [PATCH] meson: vdec: fix possible refcount leak in vdec_probe()

v4l2_device_unregister need to be called to put the refount got by
v4l2_device_register when vdec_probe fails or vdec_remove is called.

Signed-off-by: Hangyu Hua <hbh25y@...il.com>
---
 drivers/staging/media/meson/vdec/vdec.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/staging/media/meson/vdec/vdec.c b/drivers/staging/media/meson/vdec/vdec.c
index 8549d95be0f2..52f224d8def1 100644
--- a/drivers/staging/media/meson/vdec/vdec.c
+++ b/drivers/staging/media/meson/vdec/vdec.c
@@ -1102,6 +1102,7 @@ static int vdec_probe(struct platform_device *pdev)
 
 err_vdev_release:
 	video_device_release(vdev);
+	v4l2_device_unregister(&core->v4l2_dev);
 	return ret;
 }
 
@@ -1110,6 +1111,7 @@ static int vdec_remove(struct platform_device *pdev)
 	struct amvdec_core *core = platform_get_drvdata(pdev);
 
 	video_unregister_device(core->vdev_dec);
+	v4l2_device_unregister(&core->v4l2_dev);
 
 	return 0;
 }
-- 
2.34.1