From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756136Ab0FGDno (ORCPT ); Sun, 6 Jun 2010 23:43:44 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:46777 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755399Ab0FGDnn (ORCPT ); Sun, 6 Jun 2010 23:43:43 -0400 Date: Sun, 6 Jun 2010 20:38:17 -0700 (PDT) From: Linus Torvalds To: Markus Trippelsdorf cc: Theodore Tso , linux-kernel@vger.kernel.org, linux-ext4@vger.kernel.org Subject: Re: ext4 2.6.35-rc2 regression (ext4: Make sure the MOVE_EXT ioctl can't overwrite append-only files) In-Reply-To: <20100606172339.GA1778@arch.tripp.de> Message-ID: References: <20100606081601.GA1807@arch.tripp.de> <20100606115947.GA1783@arch.tripp.de> <20100606172339.GA1778@arch.tripp.de> User-Agent: Alpine 2.00 (LFD 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, 6 Jun 2010, Markus Trippelsdorf wrote: > On Sun, Jun 06, 2010 at 01:59:47PM +0200, Markus Trippelsdorf wrote: > > On Sun, Jun 06, 2010 at 07:45:48AM -0400, Theodore Tso wrote: > > > > > > On Jun 6, 2010, at 4:16 AM, Markus Trippelsdorf wrote: > > > > > > > Commit 1f5a81e41f8b1a782c68d3843e9ec1bfaadf7d72 > > > > "ext4: Make sure the MOVE_EXT ioctl can't overwrite append-only files" > > > > causes the following kernel BUG on my machine (x86_64): > > > > > > > > BUG: Bad page map in process mpd pte:720072000000000 pmd:11d2f7067 This is the same "VGA pattern": 07200720 is two spaces. It causes lots of trouble, too bad it made it into -rc2. It has nothing to do with ext4. And I bet it gets fix by the same vt.c patch that apparently fixed some KMS issues. Look on lkml for a "poison overwritten" subject line. Or just revert 962400e8fd29981a7b166e463dd143b6ac6a3e76. Linus