Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757281Ab2FYQ6Y (ORCPT ); Mon, 25 Jun 2012 12:58:24 -0400 Received: from mx1.redhat.com ([209.132.183.28]:58073 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752516Ab2FYQ6W (ORCPT ); Mon, 25 Jun 2012 12:58:22 -0400 Date: Mon, 25 Jun 2012 17:58:18 +0100 From: "Richard W.M. Jones" To: Jeff Moyer Cc: Torsten Hilbrich , linux-ext4@vger.kernel.org, LKML Subject: Re: Kernel 3.3.8 breaks accidental ext3 mount of extended partition Message-ID: <20120625165721.GX21859@amd.home.annexia.org> References: <4FDEC3C2.4060909@secunet.com> <20120625113457.GA1289@amd.home.annexia.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: 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: 1840 Lines: 47 On Mon, Jun 25, 2012 at 12:38:03PM -0400, Jeff Moyer wrote: > "Richard W.M. Jones" writes: > > > On Mon, Jun 18, 2012 at 07:59:30AM +0200, Torsten Hilbrich wrote: > >> Hello, > >> > >> a software that tries to mount each existing partition as ext3 file system started to fail when updating from v3.3.7 to v3.3.8. > >> > >> The applications then hangs-up in the mount syscall, here is a snapshot of its stack at this moment: > > > > We just ran into what we think is the same problem. > > > > Note that ext4 fails like this for any 1024 byte sized filesystem (of > > zeroes) that you try to mount. It's really nothing to do with > > extended partitions. > > > > Here is a very simple reproducer + stack trace: > > > > https://bugzilla.redhat.com/show_bug.cgi?id=835019#c4 > > > > I will try out the patch suggested later on in this thread. > > Please try the attached patch instead. The patch I had originally > posted for this allowed marking the first buffer beyond EOD as > uptodate. This isn't correct. The patch I've attached below fixes the > infinite loop in __getblk_slow. Thanks Jeff. I'm trying it now. We also found a related bug in isofs: https://bugzilla.redhat.com/show_bug.cgi?id=835084 So I will check whether your patches fixes that one too. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones New in Fedora 11: Fedora Windows cross-compiler. Compile Windows programs, test, and build Windows installers. Over 70 libraries supprt'd http://fedoraproject.org/wiki/MinGW http://www.annexia.org/fedora_mingw -- 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/