Bug#886914: systemd: Kernel Panic on systemctl daemon-relaod, unit enable/disable when libvirt vms are running

[Guido Günther]

On Sat, Mar 17, 2018 at 03:30:06AM +0100, Michael Biebl wrote:
> On Thu, 11 Jan 2018 11:01:03 +0200 "Plamen K. Kosseff"
> <plamen at anti-ad.org> wrote:
> > Package: systemd
> > Version: 236-2
> > Severity: normal
> > 
> > Dear Maintainer,
> > 
> > 
> > This is new debian buster install on HP z600 workstation (for hardware spec see below).
> > The issue has manifested first during normal "apt-get upgrade" over ssh the system would free during processing systemd triggers.
> > Upon local investigation there was Kernel panic - not synching: Attempted to kill init exitcode=0x9. I'll try to attach picture of the full panic message.
> > 
> > After some more investigation it looks like the probelm is reproducible only when there are libvirt VMs running.
> > If I stop the VMs before systemctl daemon-reload, enable disable it works as expected
> 
> Is this problem still reproducible?
> Might this actually be a kernel/kvm bug triggered by the reload of libvirt?
> 
> CCing Guido, maybe he has an idea.

Looks like it's somewhere in the cgroup code (both systemd and libvirt
use this a lot) but if so I'd say it's a kernel issue.
Cheers,
 -- Guido