Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751517AbaLRRqi (ORCPT ); Thu, 18 Dec 2014 12:46:38 -0500 Received: from mx1.redhat.com ([209.132.183.28]:39424 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751132AbaLRRqh (ORCPT ); Thu, 18 Dec 2014 12:46:37 -0500 Date: Thu, 18 Dec 2014 12:46:29 -0500 From: Richard Guy Briggs To: Eric Paris Cc: Valdis.Kletnieks@vt.edu, Paul Moore , linux-kernel@vger.kernel.org, selinux@tycho.nsa.gov, linux-audit@redhat.com Subject: Re: linux-next 20141216 BUG: sleeping function called from invalid context at mm/slab.c:2849 Message-ID: <20141218174629.GB29827@madcap2.tricolour.ca> References: <2966.1418778594@turing-police.cc.vt.edu> <5444.1418921116@turing-police.cc.vt.edu> <1418921420.5162.19.camel@localhost> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1418921420.5162.19.camel@localhost> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 14/12/18, Eric Paris wrote: > On Thu, 2014-12-18 at 11:45 -0500, Valdis.Kletnieks@vt.edu wrote: > > On Tue, 16 Dec 2014 20:09:54 -0500, Valdis Kletnieks said: > > > Spotted these two while booting single-user on 20141216. 20141208 > > > doesn't throw these, so it's something in the last week or so.. > > > > Gaah! Turns out that 20141208 *is* susceptible - it had been booting > > just fine for several days, but it went around the bend, apparently due > > to a userspace or initrd change. > > $5 says you updated systemd? > > Richard? Ok, so if you are correct, then either we justify dropping the lock (I assume the one commone to both BUG reports [sig->cred_guard_mutex] ), or we make yet another queue were were hoping to avoid... It would also be good to narrow it down to a rule that triggers this. > > egrep 'BUG|Linux vers' from my syslog: > > > > Dec 9 12:19:53 turing-police kernel: [ 0.000000] Linux version 3.18.0-next-20141208 (source@turing-police.cc.vt.edu) (gcc version 4.9.2 20141101 (Red Hat 4.9.2-1) (GCC) ) #27 SMP PREEMPT Mon Dec 8 22:20:07 EST 2014 ... > > Dec 12 19:42:30 turing-police kernel: [ 0.000000] Linux version 3.18.0-next-20141208 (source@turing-police.cc.vt.edu) (gcc version 4.9.2 20141101 (Red Hat 4.9.2-1) (GCC) ) #27 SMP PREEMPT Mon Dec 8 22:20:07 EST 2014 > > Dec 12 20:00:39 turing-police kernel: [ 1109.635328] BUG: sleeping function called from invalid context at mm/slab.c:2849 ... > > Dec 12 20:42:47 turing-police kernel: [ 3633.863552] BUG: sleeping function called from invalid context at mm/slab.c:2849 > > Dec 12 20:51:33 turing-police kernel: [ 0.000000] Linux version 3.18.0-next-20141208 (source@turing-police.cc.vt.edu) (gcc version 4.9.2 20141101 (Red Hat 4.9.2-1) (GCC) ) #27 SMP PREEMPT Mon Dec 8 22:20:07 EST 2014 > > Dec 12 21:51:04 turing-police kernel: [ 3587.132867] BUG: sleeping function called from invalid context at mm/slab.c:2849 ... > > I need to figure out what changed around 7:30PM on the 12th. - RGB -- Richard Guy Briggs Senior Software Engineer, Kernel Security, AMER ENG Base Operating Systems, Red Hat Remote, Ottawa, Canada Voice: +1.647.777.2635, Internal: (81) 32635, Alt: +1.613.693.0684x3545 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/