From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754543Ab2GRPnS (ORCPT ); Wed, 18 Jul 2012 11:43:18 -0400 Received: from mga01.intel.com ([192.55.52.88]:17386 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754153Ab2GRPnP (ORCPT ); Wed, 18 Jul 2012 11:43:15 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.71,315,1320652800"; d="scan'208";a="179712063" Message-ID: <5006D932.1060407@linux.intel.com> Date: Wed, 18 Jul 2012 08:41:38 -0700 From: Darren Hart User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120615 Thunderbird/13.0.1 MIME-Version: 1.0 To: Dave Jones , Dan Carpenter , linux-kernel@vger.kernel.org Subject: Re: potential NULL dereference in futex_wait_requeue_pi() References: <20120718142514.GA18850@elgon.mountain> <20120718153123.GA24408@redhat.com> In-Reply-To: <20120718153123.GA24408@redhat.com> X-Enigmail-Version: 1.4.2 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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