What were you trying to do that didn't work?
Reboot the L1 VM(with igb) while L2 VM(with igbvf) is running , the L1 VM crashes

Please provide the package NVR for which bug is seen:
host:
5.14.0-387.el9.x86_64
qemu-kvm-8.1.0-4.el9.x86_64
L1:
5.14.0-384.el9.x86_64
L2:
5.14.0-384.el9.x86_64

How reproducible:
100%

Steps to reproduce
1. start a L1 VM with a igb + intel iommu
2. make sure the "intel_iommu=on" in enabled in the L1 VM
3. create a igbvf
4. start a L2 VM with igbvf in the L1 VM
5. reboot the L1
6. check the host qemu-kvm log
qemu-kvm: ../hw/pci/pcie_sriov.c:181: void register_vfs(PCIDevice *): Assertion `dev->exp.sriov_pf.vf' failed.
2023-11-22 17:11:27.304+0000: shutting down, reason=crashed

Expected results
The L1 VM will not crash

Actual results
The L1 vm crashes