Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S938511AbcLVANJ (ORCPT ); Wed, 21 Dec 2016 19:13:09 -0500 Received: from mx1.redhat.com ([209.132.183.28]:36352 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751022AbcLVANG (ORCPT ); Wed, 21 Dec 2016 19:13:06 -0500 Date: Wed, 21 Dec 2016 16:13:03 -0800 From: Chris Leech To: Linus Torvalds Cc: Dave Chinner , Linux Kernel Mailing List , Lee Duncan , open-iscsi@googlegroups.com, Linux SCSI List , linux-block@vger.kernel.org, Christoph Hellwig Subject: Re: [4.10, panic, regression] iscsi: null pointer deref at iscsi_tcp_segment_done+0x20d/0x2e0 Message-ID: <20161222001303.nvrtm22szn3hgxar@straylight.hirudinean.org> Mail-Followup-To: Chris Leech , Linus Torvalds , Dave Chinner , Linux Kernel Mailing List , Lee Duncan , open-iscsi@googlegroups.com, Linux SCSI List , linux-block@vger.kernel.org, Christoph Hellwig References: <20161214222411.GH4326@dastard> <20161214222953.GI4326@dastard> <20161216185906.t2wmrr6wqjdsrduw@straylight.hirudinean.org> <20161221221638.GD4758@dastard> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23.1 (2014-03-12) X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Thu, 22 Dec 2016 00:13:06 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1243 Lines: 30 On Wed, Dec 21, 2016 at 03:19:15PM -0800, Linus Torvalds wrote: > Hi, > > On Wed, Dec 21, 2016 at 2:16 PM, Dave Chinner wrote: > > On Fri, Dec 16, 2016 at 10:59:06AM -0800, Chris Leech wrote: > >> Thanks Dave, > >> > >> I'm hitting a bug at scatterlist.h:140 before I even get any iSCSI > >> modules loaded (virtio block) so there's something else going on in the > >> current merge window. I'll keep an eye on it and make sure there's > >> nothing iSCSI needs fixing for. > > > > OK, so before this slips through the cracks..... > > > > Linus - your tree as of a few minutes ago still panics immediately > > when starting xfstests on iscsi devices. It appears to be a > > scatterlist corruption and not an iscsi problem, so the iscsi guys > > seem to have bounced it and no-one is looking at it. > > Hmm. There's not much to go by. > > Can somebody in iscsi-land please try to just bisect it - I'm not > seeing a lot of clues to where this comes from otherwise. Yeah, my hopes of this being quickly resolved by someone else didn't work out and whatever is going on in that test VM is looking like a different kind of odd. I'm saving that off for later, and seeing if I can't be a bisect on the iSCSI issue. Chris