Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S941995AbcLWAEB (ORCPT ); Thu, 22 Dec 2016 19:04:01 -0500 Received: from mx1.redhat.com ([209.132.183.28]:41686 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759969AbcLWAD7 (ORCPT ); Thu, 22 Dec 2016 19:03:59 -0500 Date: Thu, 22 Dec 2016 16:03:56 -0800 From: Chris Leech To: Ming Lei Cc: Dave Chinner , Linus Torvalds , Johannes Weiner , Linux Kernel Mailing List , Lee Duncan , open-iscsi@googlegroups.com, Linux SCSI List , linux-block , Christoph Hellwig Subject: Re: [4.10, panic, regression] iscsi: null pointer deref at iscsi_tcp_segment_done+0x20d/0x2e0 Message-ID: <20161223000356.dxwkgsei32w7hc4f@straylight.hirudinean.org> Mail-Followup-To: Chris Leech , Ming Lei , Dave Chinner , Linus Torvalds , Johannes Weiner , Linux Kernel Mailing List , Lee Duncan , open-iscsi@googlegroups.com, Linux SCSI List , linux-block , Christoph Hellwig References: <20161214222953.GI4326@dastard> <20161216185906.t2wmrr6wqjdsrduw@straylight.hirudinean.org> <20161221221638.GD4758@dastard> <20161222001303.nvrtm22szn3hgxar@straylight.hirudinean.org> <20161222051322.GF4758@dastard> <20161222065012.GI4758@dastard> <20161222185030.so4btkuzzkih3owz@straylight.hirudinean.org> 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 [10.5.110.31]); Fri, 23 Dec 2016 00:03:59 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1067 Lines: 22 On Fri, Dec 23, 2016 at 07:53:50AM +0800, Ming Lei wrote: > On Fri, Dec 23, 2016 at 2:50 AM, Chris Leech wrote: > > I'm not reproducing any problems with xfstests running over iscsi_tcp > > right now. Two 10G luns exported from an LIO target, attached directly > > to a test VM as sda/sdb and xfstests configured to use sda1/sdb1 as > > TEST_DEV and SCRATCH_DEV. > > > > The virtio scatterlist issue that popped right away for me is triggered > > by an hdparm ioctl, which is being run by tuned on Fedora. And that > > actually seems to happen back on 4.9 as well :( > > Could you share us what the specific hdparm cmd line is? I tried several > random cmds over virtio-blk/virito-scsi, looks not see this problem. Of course, looks like I've screwed up my bisect run on this so I'm still taking a look. It triggers for me with 'hdparm -B /dev/vda' but may also depend on kernel configuration. I started with the fedora rawhide config with a lot of debug on and trimed it down with a localmodconfig run in the VM to speed up rebuilds. Chris