Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934801AbcKWT7U (ORCPT ); Wed, 23 Nov 2016 14:59:20 -0500 Received: from arcturus.aphlor.org ([188.246.204.175]:56792 "EHLO arcturus.aphlor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932912AbcKWT7C (ORCPT ); Wed, 23 Nov 2016 14:59:02 -0500 Date: Wed, 23 Nov 2016 14:58:45 -0500 From: Dave Jones To: Chris Mason , Linus Torvalds , Jens Axboe , Andy Lutomirski , Andy Lutomirski , Al Viro , Josef Bacik , David Sterba , linux-btrfs , Linux Kernel , Dave Chinner Subject: Re: bio linked list corruption. Message-ID: <20161123195845.iphzr7ac4mu5ewjt@codemonkey.org.uk> Mail-Followup-To: Dave Jones , Chris Mason , Linus Torvalds , Jens Axboe , Andy Lutomirski , Andy Lutomirski , Al Viro , Josef Bacik , David Sterba , linux-btrfs , Linux Kernel , Dave Chinner References: <2bdc068d-afd5-7a78-f334-26970c91aaca@fb.com> <203e0319-bc9b-245c-e162-709267540d22@fb.com> <20161026233808.GC15247@clm-mbp.thefacebook.com> <20161026234751.e66xyzjiwifvbuha@codemonkey.org.uk> <20161031185514.b22zvbxvga4xcinz@codemonkey.org.uk> <20161031194454.GA49877@clm-mbp.thefacebook.com> <20161123193419.pq7adje2eanky2wx@codemonkey.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20161123193419.pq7adje2eanky2wx@codemonkey.org.uk> User-Agent: NeoMutt/20161104 (1.7.1) X-Spam-Flag: skipped (authorised relay user) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 475 Lines: 14 On Wed, Nov 23, 2016 at 02:34:19PM -0500, Dave Jones wrote: > [ 317.689216] BUG: Bad page state in process kworker/u8:8 pfn:4d8fd4 > trace from just before this happened. Does this shed any light ? > > https://codemonkey.org.uk/junk/trace.txt crap, I just noticed the timestamps in the trace come from quite a bit later. I'll tweak the code to do the taint checking/ftrace stop after every syscall, that should narrow the window some more. Getting closer.. Dave