Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753405AbdLSWhZ (ORCPT ); Tue, 19 Dec 2017 17:37:25 -0500 Received: from mail-qk0-f193.google.com ([209.85.220.193]:32907 "EHLO mail-qk0-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751820AbdLSWhI (ORCPT ); Tue, 19 Dec 2017 17:37:08 -0500 X-Google-Smtp-Source: ACJfBou9Gz7KFCzNSkyNDvozisX2O5H39itY8BigS66qDyuNKpOVQTRvwPuVm/ZsfkEyGP7Duc/g0w== Date: Tue, 19 Dec 2017 14:37:04 -0800 From: Tejun Heo To: George Amanakis Cc: linux-kernel@vger.kernel.org, cgroups@vger.kernel.org Subject: Re: PROBLEM: NULL pointer dereference in kernel 4.14.6 Message-ID: <20171219223704.GS3919388@devbig577.frc2.facebook.com> References: <1513628274.1378.1.camel@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1513628274.1378.1.camel@gmail.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 495 Lines: 19 Hello, On Mon, Dec 18, 2017 at 03:17:54PM -0500, George Amanakis wrote: > I can replicate this on a Thinkpad X230i running archlinux with latest > 4.14.7 kernel, without the ZFS modules. > > Steps to reproduce: > 1) create a virtual machine using libvirt (attached xml) > 2) virsh start vm > 3) head /sys/fs/cgroup/unified/machine.slice/machine- > qemu\\x2d2\\x2dvm.scope/cgroup.procs It took some massaging but I can reproduce the problem. Will report when I know more. Thanks. -- tejun