[<prev] [next>] [day] [month] [year] [list]
Message-Id: <1466637064-4662-1-git-send-email-khoroshilov@ispras.ru>
Date: Thu, 23 Jun 2016 00:11:04 +0100
From: Alexey Khoroshilov <khoroshilov@...ras.ru>
To: Shuah Khan <shuahkh@....samsung.com>,
Mauro Carvalho Chehab <mchehab@....samsung.com>
Cc: Alexey Khoroshilov <khoroshilov@...ras.ru>,
linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
ldv-project@...uxtesting.org
Subject: [BUG] au0828: dev->lock in au0828_usb_probe()
It is not quite clear what does mutex_lock(&dev->lock) defend against.
If there is a chance that some other code can try to lock the mutex during probe(),
then
mutex_unlock(&dev->lock);
kfree(dev);
looks suspicious, because when that code get control form mutex_lock(dev->lock)
the dev could be already freed.
Otherwise, dev->lock should not be acquired so early.
Another problem is that on the path going via goto done
there is no mutex_unlock(&dev->lock).
Found by Linux Driver Verification project (linuxtesting.org).
--
Alexey Khoroshilov
Linux Verification Center, ISPRAS
web: http://linuxtesting.org
Powered by blists - more mailing lists