[Pkg-libvirt-maintainers] Bug#888954: Bug#888954: libvirt-daemon: System freezes when restarting libvirtd while VM is running

[Guido Günther]

Hi,
On Wed, Jan 31, 2018 at 10:02:38AM -0500, Michael Weghorn wrote:
> Package: libvirt-daemon
> Version: 4.0.0-1
> Severity: important
> 
> Dear Maintainer,
> 
> when libvirtd is restarted while a VM is running, the system "freezes".
> 
> The following steps can be taken in order to reproduce the problem:
> 
> * Set up and start a virtual machine using `virt-install`, e.g. as follows:
> 
>     $ wget https://cdimage.debian.org/debian-cd/current/amd64/iso-cd/debian-9.3.0-amd64-netinst.iso
>     $ virt-install --connect=qemu:///system --name demo --memory 500 --disk none --network none --livecd --cdrom debian-9.3.0-amd64-netinst.iso
> 
> * While the virtual machine is running, restart the libvirt daemon:
> 
>     $ sudo systemctl restart libvirtd.service
> 
> This (almost always) leads to the system become "frozen", since a kernel
> panic is caused. The output captured on another computer with the "netconsole"
> module is given below.
> 
> 
> The kernel package in use is linux-image-4.14.0-3-amd64, version 4.14.13-1.
> systemd has version 237-1.

This looks like a kernel bug. Please reassign to the appropriate
package. I can restart libvirtd without issues with
linux-image-4.14.0-3-amd64 (although 4.14.12-2).
Cheers,
 -- Guido