linux-kernel - Re: potential NULL dereference in futex_wait_requeue

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Message-ID: <5006D932.1060407@linux.intel.com>
Date:	Wed, 18 Jul 2012 08:41:38 -0700
From:	Darren Hart <dvhart@...ux.intel.com>
To:	Dave Jones <davej@...hat.com>,
	Dan Carpenter <dan.carpenter@...cle.com>,
	linux-kernel@...r.kernel.org
Subject: Re: potential NULL dereference in futex_wait_requeue_pi()



On 07/18/2012 08:31 AM, Dave Jones wrote:
> On Wed, Jul 18, 2012 at 05:25:14PM +0300, Dan Carpenter wrote:
>  > Hi Darren,
>  > 
>  > The patch 52400ba94675: "futex: add requeue_pi functionality" from
>  > Apr 3, 2009, leads to the following warning:
>  > kernel/futex.c:2373 futex_wait_requeue_pi()
>  > 	 error: potential NULL dereference 'pi_mutex'.
> 
> This sounds like the oops I saw that I reported at https://lkml.org/lkml/2012/7/13/328

I'm looking into the report Dave sent today (delayed from piles of
urgent issues after returning from vacation, my apologies).

Dan, under which workload are you seeing this?

-- 
Darren Hart
Intel Open Source Technology Center
Yocto Project - Linux Kernel


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