Patching the commit @lindt found, and recompiling a custom kernel allowed me to start a VM in an ESXi VM nested in Openstack.
Be aware I needed to delete the previously crashing VM in ESXI and create a new one. Failing to do so resulted in ESXi crashing completely and restarting.
Can confirm, bug occurs with my setup too:
Host: Centos 9 Stream (5.14.0- 352.el9. x86_64)
Hypervisor: KVM (Openstack)
VM: ESXi 7.0u3
Patching the commit @lindt found, and recompiling a custom kernel allowed me to start a VM in an ESXi VM nested in Openstack.
Be aware I needed to delete the previously crashing VM in ESXI and create a new one. Failing to do so resulted in ESXi crashing completely and restarting.
Can provide additional logs or data if needed.