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

Non-root user connects to libvirt daemon, terminate the cmd during the authentication process. Then root user run cmd "virsh list", and the cmd hungs.

Please provide the package NVR for which bug is seen:

libvirt-9.9.0-1.el9.x86_64

How reproducible:100%

Steps to reproduce

1. set below setting in /etc/libvirt/virtqemud.conf

 log_level  = 1

 log_outputs  = "1:file:/var/log/libvirt/libvirtd.log"

2. restart virtqemud

systemctl restart virtqemud

3. use gdb to attach to virtqemud process, set break point at func "virNetServerSetClientAuthenticated" then continue the process

 # gdb -p `pidof virtqemud`

(gdb) br virNetServerSetClientAuthenticated
Breakpoint 2 at 0x7f7b549faad0
(gdb) c
Continuing.

4. at another terminal, connect qemu:///system with non-root user, input right user and passwd, after the authentication complete(virsh client will be stopped at that point since br set in gdb), enter "Ctrl+c"

$ virsh -c qemu:///system
==== AUTHENTICATING FOR org.libvirt.unix.manage ====
System policy prevents management of local virtualized systems
Authenticating as: root
Password: 
==== AUTHENTICATION COMPLETE ====
^C

5. Then in gdb terminal of step3, enter 'c' to continue

Thread 8 "prio-rpc-virtqe" hit Breakpoint 2, 0x00007f7b549faad0 in virNetServerSetClientAuthenticated () from /lib64/libvirt.so.0
(gdb) c
Continuing.

Actual results

6. Check the libvirt daemon log about nclient, we could see the nclients and nclients_unauth all equal 1.
 # cat /var/log/libvirt/libvirtd.log | grep -i nclient

2024-01-02 03:31:32.594+0000: 11865: debug : virNetServerCheckLimits:269 : Checking client-related limits to re-enable or temporarily suspend services: nclients=1 nclients_max=5000 nclients_unauth=1 nclients_unauth_max=20

7.  root user run cmd "virsh list" and the cmd hungs

 # virsh list

Expected results

1.  the libvirt daemon log about nclient, the nclients and nclients_unauth should change  to  0.

2.  root user and run cmd "virsh list" should not hung

Additional info

1. If non-root user run cmd "virsh list" and the cmd get result successfully

$ virsh list
 Id   Name   State
--------------------

2. Similar issue please check the bug:

https://bugzilla.redhat.com/show_bug.cgi?id=1691415