From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Subject: Re: PROBLEM: NULL pointer dereference in kernel 4.14.6
Date: Tue, 19 Dec 2017 14:37:04 -0800
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To: George Amanakis <gamanakis-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org

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