[PATCH] media: dvbdev: Fix memory leak in dvb_media_device_free()

* [PATCH] media: dvbdev: Fix memory leak in dvb_media_device_free()
@ 2020-12-11  8:30 Peilin Ye
  0 siblings, 0 replies; only message in thread
From: Peilin Ye @ 2020-12-11  8:30 UTC (permalink / raw)
  To: Mauro Carvalho Chehab
  Cc: Laurent Pinchart, Sean Young, Brad Love, Wolfram Sang,
	linux-media, linux-kernel, Peilin Ye

dvb_media_device_free() is leaking memory. Free `dvbdev->adapter->conn`
before setting it to NULL, as documented in include/media/media-device.h:
"The media_entity instance itself must be freed explicitly by the driver
if required."

Cc: stable@vger.kernel.org
Fixes: 0230d60e4661 ("[media] dvbdev: Add RF connector if needed")
Reported-by: syzbot+7f09440acc069a0d38ac@syzkaller.appspotmail.com
Link: https://syzkaller.appspot.com/bug?id=9bbe4b842c98f0ed05c5eed77a226e9de33bf298
Signed-off-by: Peilin Ye <yepeilin.cs@gmail.com>
---
 drivers/media/dvb-core/dvbdev.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/dvb-core/dvbdev.c b/drivers/media/dvb-core/dvbdev.c
index 959fa2820259..ec9ebff28552 100644
--- a/drivers/media/dvb-core/dvbdev.c
+++ b/drivers/media/dvb-core/dvbdev.c
@@ -241,6 +241,7 @@ static void dvb_media_device_free(struct dvb_device *dvbdev)
 
 	if (dvbdev->adapter->conn) {
 		media_device_unregister_entity(dvbdev->adapter->conn);
+		kfree(dvbdev->adapter->conn);
 		dvbdev->adapter->conn = NULL;
 		kfree(dvbdev->adapter->conn_pads);
 		dvbdev->adapter->conn_pads = NULL;
-- 
2.25.1


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