linux-kernel - Re: [PATCH 1/1] media: video/cx18, fix potential null dereference

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Message-ID: <4B4C5CEF.5060601@gmail.com>
Date:	Tue, 12 Jan 2010 12:28:47 +0100
From:	Jiri Slaby <jirislaby@...il.com>
To:	Andy Walls <awalls@...ix.net>
CC:	mchehab@...hat.com, hverkuil@...all.nl, ivtv-devel@...vdriver.org,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] media: video/cx18, fix potential null dereference

On 01/12/2010 12:48 AM, Andy Walls wrote:
> On Sun, 2010-01-10 at 09:56 +0100, Jiri Slaby wrote:
>> Stanse found a potential null dereference in cx18_dvb_start_feed
>> and cx18_dvb_stop_feed. There is a check for stream being NULL,
>> but it is dereferenced earlier. Move the dereference after the
>> check.
>>
>> Signed-off-by: Jiri Slaby <jslaby@...e.cz>
> 
> Reviewed-by: Andy Walls <awalls@...ix.net>
> Acked-by: Andy Walls <awalls@...ix.net>

You definitely know the code better, have you checked that it can happen
at all? I mean may demux->priv be NULL?
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