What were you trying to do that didn't work?

Start network with configuration of "<domain register"

What is the impact of this issue to you?

Network cannot be started

Please provide the package NVR for which the bug is seen:

libvirt-10.5.0-5.el10.x86_64
systemd-resolved-256-14.el10.x86_64
kernel-6.11.0-0.rc5.22.el10.x86_64

How reproducible is this bug?:

100%

Steps to reproduce

1. Install systemd-resolved and start service
   
   # yum install systemd-resolved 
   # systemctl start systemd-resolved
   

1. Configure default network with <domain register='yes'>

<network>
  <name>default</name>
  <uuid>d9c1db08-da0d-46c9-b511-38b921bf2561</uuid>
  <forward mode='nat'>
    <nat>
      <port start='1024' end='65535'/>
    </nat>
  </forward>
  <bridge name='virbr0' stp='on' delay='0'/>
  <mac address='52:54:00:e4:57:cd'/>
  <domain name='example.com' localOnly='yes' register='yes'/>
  <ip address='192.168.122.1' netmask='255.255.255.0'>
    <dhcp>
      <range start='192.168.122.2' end='192.168.122.254'/>
      <host mac='52:54:00:40:f7:da' name='vm1' ip='192.168.122.32'/>
    </dhcp>
  </ip>
</network> 

1. Restart virtnetworkd

   Running 'systemctl restart virtnetworkd' Command 'systemctl restart virtnetworkd' finished with 0 after 0.041523059s 

1. Start default network

   Running virsh command: net-start default
   Running '/usr/bin/virsh net-start default '
   [stderr] error:
   [stdout]
   [stderr] Failed to start network default
   [stderr] error: internal error: failed to register name server 

Expected results

Network could be started

Actual results

Network cannot be started

The same test will pass with 

systemd-resolved-256-13.el10.x86_64

libvirt-10.5.0-5.el10.x86_64