From: Peilin Ye Date: Fri, 11 Dec 2020 08:30:39 +0000 (+0100) Subject: media: dvbdev: Fix memory leak in dvb_media_device_free() X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=06854b943e0571ccbd7ad0a529babed1a98ff275;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git media: dvbdev: Fix memory leak in dvb_media_device_free() commit bf9a40ae8d722f281a2721779595d6df1c33a0bf upstream. 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." Link: https://syzkaller.appspot.com/bug?id=9bbe4b842c98f0ed05c5eed77a226e9de33bf298 Link: https://lore.kernel.org/linux-media/20201211083039.521617-1-yepeilin.cs@gmail.com Cc: stable@vger.kernel.org Fixes: 0230d60e4661 ("[media] dvbdev: Add RF connector if needed") Reported-by: syzbot+7f09440acc069a0d38ac@syzkaller.appspotmail.com Signed-off-by: Peilin Ye Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/media/dvb-core/dvbdev.c b/drivers/media/dvb-core/dvbdev.c index a1cc1c1e5318..fb1284051d05 100644 --- a/drivers/media/dvb-core/dvbdev.c +++ b/drivers/media/dvb-core/dvbdev.c @@ -216,6 +216,7 @@ 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;