From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: multipart/mixed; boundary="===============2566784644558942640==" MIME-Version: 1.0 From: Josh Poimboeuf To: lkp@lists.01.org Subject: Re: [lockdep] b09be676e0 BUG: unable to handle kernel NULL pointer dereference at 000001f2 Date: Mon, 09 Oct 2017 08:03:24 -0500 Message-ID: <20171009130324.jxcv6bceforwvhfr@treble> In-Reply-To: <20171009125404.nxo5zke62cv42x2s@hirez.programming.kicks-ass.net> List-Id: --===============2566784644558942640== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable On Mon, Oct 09, 2017 at 02:54:04PM +0200, Peter Zijlstra wrote: > On Mon, Oct 09, 2017 at 08:21:13PM +0800, Fengguang Wu wrote: > > > > From e7840ad76515f0b5061fcdd098b57b7c01b61482 Mon Sep 17 00:00:00 2= 001 > > > > Message-Id: > > > > From: Josh Poimboeuf > > > > Date: Thu, 5 Oct 2017 09:43:59 -0500 > > > > Subject: [PATCH 1/2] unwinder fixes > > > > = > > > > --- > > > > arch/x86/kernel/unwind_frame.c | 33 ++++++++++++++++++++++++++++++= --- > > = > > I just test 316 boots and see 7 WARNINGs: > > = > > [ 404.948035] WARNING: kernel stack frame pointer at c6ea3ecd in init:= 212 has bad value (null) > > [ 298.118383] WARNING: kernel stack frame pointer at cde07dad in init:= 1 has bad value bc000000 > > [ 112.848677] WARNING: kernel stack frame pointer at cde07dbd in swapp= er/0:1 has bad value c2000000 > > [ 127.942417] WARNING: kernel stack frame pointer at cf95de71 in rb_pr= oducer:50 has bad value 03cf95de > > [ 4.736938] WARNING: kernel stack frame pointer at bf643d59 in kwork= er/0:1:15 has bad value b5000000 > > [ 308.260066] WARNING: kernel stack frame pointer at bde07da5 in udevd= :155 has bad value b5bfa17b These unwinder warnings can be ignored. I meant to disable them on 32-bit with the patch, but obviously failed to do so. -- = Josh --===============2566784644558942640==-- From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754415AbdJINDb (ORCPT ); Mon, 9 Oct 2017 09:03:31 -0400 Received: from mx1.redhat.com ([209.132.183.28]:50548 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754265AbdJIND3 (ORCPT ); Mon, 9 Oct 2017 09:03:29 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 0768E7E439 Authentication-Results: ext-mx03.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx03.extmail.prod.ext.phx2.redhat.com; spf=fail smtp.mailfrom=jpoimboe@redhat.com Date: Mon, 9 Oct 2017 08:03:24 -0500 From: Josh Poimboeuf To: Peter Zijlstra Cc: Fengguang Wu , Linus Torvalds , Byungchul Park , Ingo Molnar , Linux Kernel Mailing List , LKP Subject: Re: [lockdep] b09be676e0 BUG: unable to handle kernel NULL pointer dereference at 000001f2 Message-ID: <20171009130324.jxcv6bceforwvhfr@treble> References: <20171003140634.r2jzujgl62ox4uzh@wfg-t540p.sh.intel.com> <20171005130146.pmayo6owv362zfai@treble> <20171005145414.4bbcr3jornabes7c@treble> <20171009105055.7vfk2ncolyouzunb@hirez.programming.kicks-ass.net> <20171009122113.nj2tn22mt2oxptvr@wfg-t540p.sh.intel.com> <20171009125404.nxo5zke62cv42x2s@hirez.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20171009125404.nxo5zke62cv42x2s@hirez.programming.kicks-ass.net> User-Agent: Mutt/1.6.0.1 (2016-04-01) X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Mon, 09 Oct 2017 13:03:29 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Oct 09, 2017 at 02:54:04PM +0200, Peter Zijlstra wrote: > On Mon, Oct 09, 2017 at 08:21:13PM +0800, Fengguang Wu wrote: > > > > From e7840ad76515f0b5061fcdd098b57b7c01b61482 Mon Sep 17 00:00:00 2001 > > > > Message-Id: > > > > From: Josh Poimboeuf > > > > Date: Thu, 5 Oct 2017 09:43:59 -0500 > > > > Subject: [PATCH 1/2] unwinder fixes > > > > > > > > --- > > > > arch/x86/kernel/unwind_frame.c | 33 ++++++++++++++++++++++++++++++--- > > > > I just test 316 boots and see 7 WARNINGs: > > > > [ 404.948035] WARNING: kernel stack frame pointer at c6ea3ecd in init:212 has bad value (null) > > [ 298.118383] WARNING: kernel stack frame pointer at cde07dad in init:1 has bad value bc000000 > > [ 112.848677] WARNING: kernel stack frame pointer at cde07dbd in swapper/0:1 has bad value c2000000 > > [ 127.942417] WARNING: kernel stack frame pointer at cf95de71 in rb_producer:50 has bad value 03cf95de > > [ 4.736938] WARNING: kernel stack frame pointer at bf643d59 in kworker/0:1:15 has bad value b5000000 > > [ 308.260066] WARNING: kernel stack frame pointer at bde07da5 in udevd:155 has bad value b5bfa17b These unwinder warnings can be ignored. I meant to disable them on 32-bit with the patch, but obviously failed to do so. -- Josh