As an example, I have tried to reproduce with the following
configuration:
(k)rafaeldtinoco@win2019crashhost:~$ uname -a
Linux win2019crashhost 5.0.0-34-generic #36-Ubuntu SMP Wed Oct 30 05:16:14 UTC
2019 x86_64 x86_64 x86_64 GNU/Linux
----
(k)rafaeldtinoco@win2019crashhost:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 19.10
Release: 19.10
Codename: eoan
----
(k)rafaeldtinoco@win2019crashhost:~$ virsh dumpxml win2019crash
<domain type='kvm'>
<name>win2019crash</name>
<uuid>68ea22b7-7401-45bb-a7b0-a60956081e42</uuid>
<memory unit='KiB'>8388608</memory>
<currentMemory unit='KiB'>8388608</currentMemory>
<vcpu placement='static'>4</vcpu>
<resource>
<partition>/machine</partition>
</resource>
<os>
<type arch='x86_64' machine='pc-i440fx-2.5'>hvm</type>
<boot dev='cdrom'/>
<boot dev='hd'/>
</os>
<features>
<acpi/>
<apic/>
</features>
<cpu mode='host-passthrough' check='none'/>
<clock offset='utc'>
<timer name='rtc' tickpolicy='catchup'/>
<timer name='pit' tickpolicy='delay'/>
<timer name='hpet' present='yes'/>
</clock>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>restart</on_crash>
<pm>
<suspend-to-mem enabled='no'/>
<suspend-to-disk enabled='no'/>
</pm>
<devices>
<emulator>/usr/bin/qemu-system-x86_64</emulator>
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2'/>
<source file='/var/lib/libvirt/images/win2019crash/disk01.ext4.qcow2'/>
<target dev='vda' bus='virtio'/>
</disk>
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
<source file='/var/lib/libvirt/images/kwin2019/win2019.iso'/>
<target dev='hdc' bus='ide'/>
<readonly/>
</disk>
<disk type='file' device='floppy'>
<driver name='qemu' type='raw'/>
<source file='/var/lib/libvirt/images/kwin2019/virtio.vfd'/>
<target dev='fda' bus='fdc'/>
<readonly/>
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
<controller type='usb' index='0' model='piix3-uhci'>
</controller>
<controller type='pci' index='0' model='pci-root'/>
<controller type='ide' index='0'>
</controller>
<controller type='scsi' index='0' model='lsilogic'>
</controller>
<controller type='fdc' index='0'/>
<interface type='bridge'>
<mac address='52:54:00:3d:1d:9d'/>
<source bridge='bridge0'/>
<model type='virtio'/>
</interface>
<serial type='pty'>
<target type='isa-serial' port='0'>
<model name='isa-serial'/>
</target>
</serial>
<console type='pty'>
<target type='serial' port='0'/>
</console>
<input type='mouse' bus='ps2'/>
<input type='keyboard' bus='ps2'/>
<graphics type='vnc' port='-1' autoport='yes' listen='0.0.0.0'
keymap='en-us'>
<listen type='address' address='0.0.0.0'/>
</graphics>
<video>
<model type='cirrus' vram='16384' heads='1' primary='yes'/>
</video>
<memballoon model='virtio'>
</memballoon>
</devices>
</domain>
But I saw you're using q35 arch model, so I might give it another try,
and I have tested this in an AMD machine, but I have Intel machine
available to test as well. Having your host's CPU type would also be
great.
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https://bugs.launchpad.net/bugs/1849720
Title:
Running VM with Virtual NIC Crashes Host OS
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