linux-kernel - Re: [BUG] ati_remote2.c: possible mutex_lock without mutex

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Message-ID: <alpine.LSU.2.00.0910140915440.8582@wotan.suse.de>
Date:	Wed, 14 Oct 2009 09:16:31 +0200 (CEST)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	iceberg <strakh@...ras.ru>, Vojtech Pavlik <vojtech@...e.cz>,
	Linux Kernlel Mailing List <linux-kernel@...r.kernel.org>,
	linux-input@...r.kernel.org
Subject: Re: [BUG] ati_remote2.c: possible mutex_lock without mutex_unlock

On Wed, 14 Oct 2009, Dmitry Torokhov wrote:

> > > From: Dmitry Torokhov <dmitry.torokhov@...il.com>
> > > 
> > > input_devices_seq_start() uses mutex_lock_interruptible() to acquire
> > > the input_mutex, but doesn't properly handle the situation when the
> > > call fails (for example due to interrupt). Instead of returning NULL
> > > (which indicates that there is no more data) we should return
> > > ERR_PTR()-encoded error.
> > > 
> > > We also need explicit flag indicating whether input_mutex was acquired
> > > since input_devices_seq_stop() is called whether input_devices_seq_start()
> > > was successful or not.
> > > 
> > > The same applies to input_handlers_seq_start().
> > > 
> > > Reported-by: iceberg <strakh@...ras.ru>
> > > Signed-off-by: Dmitry Torokhov <dtor@...l.ru>
> > 
> > Yup, looks OK to me.
> 
> Putting you as "Reviewed-by.." then, OK?

Sure, feel free to do that.

Thanks,

-- 
Jiri Kosina
SUSE Labs, Novell Inc.
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