linux-kernel - [PATCH 2/5] MEDIA: ttusbir, fix double free

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Date:	Thu,  4 Apr 2013 22:32:09 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	jirislaby@...il.com
Cc:	linux-kernel@...r.kernel.org, Sean Young <sean@...s.org>,
	Mauro Carvalho Chehab <mchehab@...hat.com>,
	linux-media@...r.kernel.org
Subject: [PATCH 2/5] MEDIA: ttusbir, fix double free

rc_unregister_device already calls rc_free_device to free the passed
device. But in one of ttusbir's probe fail paths, we call
rc_unregister_device _and_ rc_free_device. This is wrong and results
in a double free.

Instead, set rc to NULL resulting in rc_free_device being a noop.

Signed-off-by: Jiri Slaby <jslaby@...e.cz>
Cc: Sean Young <sean@...s.org>
Cc: Mauro Carvalho Chehab <mchehab@...hat.com>
Cc: linux-media@...r.kernel.org
---
 drivers/media/rc/ttusbir.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/rc/ttusbir.c b/drivers/media/rc/ttusbir.c
index cf0d47f..891762d 100644
--- a/drivers/media/rc/ttusbir.c
+++ b/drivers/media/rc/ttusbir.c
@@ -347,6 +347,7 @@ static int ttusbir_probe(struct usb_interface *intf,
 	return 0;
 out3:
 	rc_unregister_device(rc);
+	rc = NULL;
 out2:
 	led_classdev_unregister(&tt->led);
 out:
-- 
1.8.2


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