Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933325AbaLEAyI (ORCPT ); Thu, 4 Dec 2014 19:54:08 -0500 Received: from mail-pd0-f169.google.com ([209.85.192.169]:43358 "EHLO mail-pd0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754494AbaLEAyF (ORCPT ); Thu, 4 Dec 2014 19:54:05 -0500 Date: Thu, 4 Dec 2014 16:54:01 -0800 From: Jeremiah Mahler To: Stephen Rothwell Cc: linux-next@vger.kernel.org, linux-kernel@vger.kernel.org, Dmitry Monakhov , "Theodore Ts'o" Subject: Re: linux-next: Tree for Dec 4 Message-ID: <20141205005401.GA1279@hudson.localdomain> Mail-Followup-To: Jeremiah Mahler , Stephen Rothwell , linux-next@vger.kernel.org, linux-kernel@vger.kernel.org, Dmitry Monakhov , Theodore Ts'o References: <20141204195928.4a5b93f4@canb.auug.org.au> <20141204233411.GA1223@hudson.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20141204233411.GA1223@hudson.localdomain> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org all, On Thu, Dec 04, 2014 at 03:34:11PM -0800, Jeremiah Mahler wrote: > all, > > On Thu, Dec 04, 2014 at 07:59:28PM +1100, Stephen Rothwell wrote: > > Hi all, > > > > Changes since 20141203: > > [...] > > > > -- > > Cheers, > > Stephen Rothwell sfr@canb.auug.org.au > > > [...] > > linux-next 20141204 is broken on all my machines, 20141203 worked fine. > > They fail very early in the boot process and are unable to mount root. > There are lots of "ext4_check_descriptors: Checksum for group ... > failed" messages. > > Any suggestions for where to start looking? > > -- > - Jeremiah Mahler I ran a bisect and found this patch to be faulty. commit fdfe073987619ec375da8d8a2701ab271d1b1339 Author: Dmitry Monakhov Date: Tue Dec 2 16:09:16 2014 -0500 ext4: fix potential use after free during resize We need some sort of synchronization while updating ->s_group_desc because there are a lot of users which can access old ->s_group_desc array after it was released. Signed-off-by: Dmitry Monakhov Signed-off-by: Theodore Ts'o -- - Jeremiah Mahler -- 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/