From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.0 required=3.0 tests=MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6D7C5C4360F for ; Thu, 4 Apr 2019 14:23:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 423A220882 for ; Thu, 4 Apr 2019 14:23:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727333AbfDDOXw convert rfc822-to-8bit (ORCPT ); Thu, 4 Apr 2019 10:23:52 -0400 Received: from mail.wl.linuxfoundation.org ([198.145.29.98]:54072 "EHLO mail.wl.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726618AbfDDOXw (ORCPT ); Thu, 4 Apr 2019 10:23:52 -0400 Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4F50B28A9D for ; Thu, 4 Apr 2019 14:23:51 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 43CF828A9B; Thu, 4 Apr 2019 14:23:51 +0000 (UTC) From: bugzilla-daemon@bugzilla.kernel.org To: linux-ext4@vger.kernel.org Subject: [Bug 203107] Bad page map in process during boot Date: Thu, 04 Apr 2019 14:23:50 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: AssignedTo fs_ext4@kernel-bugs.osdl.org X-Bugzilla-Product: File System X-Bugzilla-Component: ext4 X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: vbabka@suse.cz X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P1 X-Bugzilla-Assigned-To: fs_ext4@kernel-bugs.osdl.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-ext4-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org https://bugzilla.kernel.org/show_bug.cgi?id=203107 --- Comment #4 from Vlastimil Babka (vbabka@suse.cz) --- On 4/4/19 3:08 PM, Kirill A. Shutemov wrote: > On Tue, Apr 02, 2019 at 12:16:13PM +0200, Jan Kara wrote: >> Switching to email... >> >> On Fri 29-03-19 20:46:22, bugzilla-daemon@bugzilla.kernel.org wrote: >>> https://bugzilla.kernel.org/show_bug.cgi?id=203107 >>> >>> Bug ID: 203107 >>> Summary: Bad page map in process during boot >>> Product: File System >>> Version: 2.5 >>> Kernel Version: 5.0.5 >>> Hardware: All >>> OS: Linux >>> Tree: Mainline >>> Status: NEW >>> Severity: normal >>> Priority: P1 >>> Component: ext4 >>> Assignee: fs_ext4@kernel-bugs.osdl.org >>> Reporter: echto1@gmail.com >>> Regression: No >>> >>> Error occurs randomly at boot after upgrading kernel from 5.0.0 to 5.0.4. >>> >>> https://justpaste.it/387uf >> >> I don't think this is an ext4 error. Sure this is an error in file mapping >> of libblkid.so.1.1.0 (which is handled by ext4) but the filesystem has very >> little to say wrt how or which PTEs are installed. And the problem is that >> invalid PTE (dead000000000100) is present in page tables. So this looks >> more like a problem in MM itself. Adding MM guys to CC. > > 0xdead000000000100 and 0xdead000000000200 are LIST_POISON1 and > LIST_POISON2 repectively. Have no idea how would they end up in page table. It's possible that CONFIG_DEBUG_LIST could catch the issue. Between 5.0.0 to 5.0.4 it should be also relatively easy to bisect with the stable git tree [1], although if it happens randomly, you need to perform enough attempts to accurately determine which commit is "good". [1] git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git -- You are receiving this mail because: You are watching the assignee of the bug.