linux-kernel - Re: [PATCH] usb: gadget: mv_u3d_core: fix violation of locking discipline in mv_u3d_ep

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Date:	Fri, 26 Jul 2013 19:26:05 +0400
From:	Alexey Khoroshilov <khoroshilov@...ras.ru>
To:	balbi@...com
CC:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	ldv-project@...uxtesting.org
Subject: Re: [PATCH] usb: gadget: mv_u3d_core: fix violation of locking discipline
 in mv_u3d_ep_disable()

Hi Felipe,

On 07/25/2013 09:30 PM, Felipe Balbi wrote:
> On Wed, Jul 24, 2013 at 12:20:17AM +0400, Alexey Khoroshilov wrote:
>> mv_u3d_nuke() expects to be calles with ep->u3d->lock held,
>> because mv_u3d_done() does. But mv_u3d_ep_disable() calls it
>> without lock that can lead to unpleasant consequences.
>>
>> Found by Linux Driver Verification project (linuxtesting.org).
>>
>> Signed-off-by: Alexey Khoroshilov <khoroshilov@...ras.ru>
> which commit introduced the bug ? Which kernels are affected by this bug ?
The bug is present from the very beginning: commit 3d4eb9d of 15 June 2012.
So it is in the mainline since v3.5.

--
Alexey
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