From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754428AbdJIMyP (ORCPT ); Mon, 9 Oct 2017 08:54:15 -0400 Received: from bombadil.infradead.org ([65.50.211.133]:56001 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754356AbdJIMyM (ORCPT ); Mon, 9 Oct 2017 08:54:12 -0400 Date: Mon, 9 Oct 2017 14:54:04 +0200 From: Peter Zijlstra To: Fengguang Wu Cc: Josh Poimboeuf , 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: <20171009125404.nxo5zke62cv42x2s@hirez.programming.kicks-ass.net> 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> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20171009122113.nj2tn22mt2oxptvr@wfg-t540p.sh.intel.com> User-Agent: NeoMutt/20170609 (1.8.3) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 > > [ 277.473596] WARNING: CPU: 0 PID: 520 at kernel/locking/lockdep.c:3841 check_flags+0x119/0x1b0 That's much better than NULL pointer derefs. Is there any chance I could get your userspace image such that I can try and repro? It appears to run trinity.. And you're still using the same .config from the original report? From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: multipart/mixed; boundary="===============9006767602628807047==" MIME-Version: 1.0 From: Peter Zijlstra To: lkp@lists.01.org Subject: Re: [lockdep] b09be676e0 BUG: unable to handle kernel NULL pointer dereference at 000001f2 Date: Mon, 09 Oct 2017 14:54:04 +0200 Message-ID: <20171009125404.nxo5zke62cv42x2s@hirez.programming.kicks-ass.net> In-Reply-To: <20171009122113.nj2tn22mt2oxptvr@wfg-t540p.sh.intel.com> List-Id: --===============9006767602628807047== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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:21= 2 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_prod= ucer: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:1= 55 has bad value b5bfa17b > = > [ 277.473596] WARNING: CPU: 0 PID: 520 at kernel/locking/lockdep.c:3841 = check_flags+0x119/0x1b0 That's much better than NULL pointer derefs. Is there any chance I could get your userspace image such that I can try and repro? It appears to run trinity.. And you're still using the same .config from the original report? --===============9006767602628807047==--