[Pkg-libvirt-maintainers] Bug#897634: Libvirt cannot start more than one vm after upgrading kernel from 3.16.0-5 to 3.16.0-6

[Sebastian Schweizer]

Package: libvirt-daemon
Version: 1.2.9-9+deb8u5

Hello,

I'm using libvirt on jessie to manage several qemu based vms.
After upgrading my host kernel from linux-image-3.16.0-5-amd64 to
linux-image-3.16.0-6-amd64 and restarting the system, only a single vm
came up. Syslog shows:

libvirtd: Cannot get interface MAC on 'vnet%d': No such device
libvirtd: Failed to autostart VM 'vm2': Cannot get interface MAC on
'vnet%d': No such device

The same error occurs when trying to start the vm with 'virsh start vm2'

The configuration is nothing special, each vm is bound to a separate
bridge on the host (routed setup). After downgrading to the previous
kernel, everything works fine again.

This might be related: https://bugzilla.redhat.com/show_bug.cgi?id=1506822
Is it possible to backport the fix mentionned there (comment 6) to jessie?

All the best,
Sebastian