Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756932Ab3JQOZH (ORCPT ); Thu, 17 Oct 2013 10:25:07 -0400 Received: from mail-wi0-f173.google.com ([209.85.212.173]:33687 "EHLO mail-wi0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756290Ab3JQOZD (ORCPT ); Thu, 17 Oct 2013 10:25:03 -0400 Date: Thu, 17 Oct 2013 16:25:00 +0200 From: Frederic Weisbecker To: Ingo Molnar Cc: "Paul E. McKenney" , Linus Torvalds , Knut Petersen , Thomas Gleixner , Greg KH , linux-kernel Subject: Re: [BUG 3.12.rc4] Oops: unable to handle kernel paging request during shutdown Message-ID: <20131017142458.GG28963@localhost.localdomain> References: <525BD08C.2080101@t-online.de> <20131014212830.GD5790@linux.vnet.ibm.com> <20131014215117.GE13538@localhost.localdomain> <20131015064025.GA22672@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20131015064025.GA22672@gmail.com> 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 Content-Length: 1031 Lines: 28 On Tue, Oct 15, 2013 at 08:40:25AM +0200, Ingo Molnar wrote: > > * Frederic Weisbecker wrote: > > > I've been thinking that CONFIG_DEBUG_LIST could help. Unfortunately it's > > good to spot list APIs misuse but, if Linus is right, the problem may be > > that the list belongs to an object that has been freed, and I believe > > that won't detect such a thing. > > Use-after free should be reliably detectable via CONFIG_DEBUG_PAGEALLOC=y. > > A couple of years ago I wrote a list debugging beast that would catch > use-after-free mishaps (sent it to lkml too IIRC), but it was a bit > complex and I never found the time to nurse it upstream. Ok, well CONFIG_DEBUG_PAGEALLOC=y should work for list as for anything, right? Thanks. > > Thanks, > > Ingo -- 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/