OVN controller crashed on compute node

Issue

• We saw that on a particular compute node, the ovn-controller crashed dumping a coredump file and the service was restarted by systemd.

• ovn-controller core dumped and the corefile returns this:

Core was generated by `/usr/bin/ovn-controller --pidfile --log-file unix:/run/openvswitch/db.sock'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x000055fe51666847 in handle_deleted_lport ()
[Current thread is 1 (LWP 8)]
Missing separate debuginfos, use: yum debuginfo-install ovn2.13-host-20.12.0-196.el8fdp.x86_64
(gdb) bt
#0  0x000055fe51666847 in handle_deleted_lport ()
#1  0x000055fe5166a1c7 in binding_handle_port_binding_changes ()
#2  0x000055fe51690978 in runtime_data_sb_port_binding_handler ()
#3  0x000055fe516ab9db in engine_run ()
#4  0x000055fe51663b75 in main ()