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

The guest with a network disk (SSH/HTTP/HTTPS) will shut down when reverting to the first snapshot.

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

libvirt-10.10.0-6.el9.x86_64
qemu-kvm-9.1.0-14.el9.x86_64

How reproducible is this bug?:

100%

Steps to reproduce

0. Edit storage_use_nbdkit = 1 to /etc/libvirt/qemu.conf and restart virtqemud service.

1. Prepare a ssh server.
2. Prepare the /tmp/known_hosts and /tmp/id_rsa required in ssh network disk.
Note: On the local machine, /tmp/known_hosts stores the public key of the remote host, and /tmp/id_rsa stores the local private key. Before that, we need to use ssh-copy-id from local host to remote host.
3. Start the guest with ssh network disk.

<disk type="network" device="disk">
  <driver name="qemu" type="raw"/>
  <source protocol="ssh" name="/var/lib/libvirt/images/test.img" index="1">
    <host name="10.73.210.25" port="22"/>
    <knownHosts path="/tmp/known_hosts"/>
    <identity username="root" keyfile="/tmp/id_rsa"/>
  </source>
  <target dev="sdb" bus="scsi"/>
  <alias name="scsi0-0-0-1"/>
  <address type="drive" controller="0" bus="0" target="0" unit="1"/>
</disk> 

4. Create snapshots.

# for i in {1..3}; do virsh snapshot-create-as rhel s$i --memspec snapshot=external,file=/tmp/mem.s$i --diskspec vda,snapshot=no --diskspec sdb,snapshot=external,file=/var/lib/libvirt/images/test.s$i; done
Domain snapshot s1 created
Domain snapshot s2 created
Domain snapshot s3 created 

5. Revert the snapshot to s1.

1. virsh snapshot-revert rhel s1
   error: Failed to revert snapshot s1
   error: unsupported configuration: source for disk 'sdb' is not a regular file; refusing to generate external snapshot name
   6. Check the guest status.
2. virsh list --all
    Id   Name             State
   ---------------------------------
    -    rhel             shut off

   Expected results

The guest is still running.

Actual results

The guest is shut down.