On a Thursday in 2026, Pavel Hrdina via Devel wrote:
From: Pavel Hrdina <[email protected]>On systems with selinux enabled starting a VM with managed host device using IOMMUFD backend can run into race-condition where both libvirt and udev are setting selinux label on /dev/vfio/devices/vfioX device. If udev is the last one to set selinux label starting VM fails with: error: internal error: QEMU unexpectedly closed the monitor (vm='test'): 2026-03-26T15:47:36.620422Z qemu-kvm: -device {"driver":"vfio-pci","id":"hostdev0","iommufd":"iommufd0","fd":"20","bus":"pci.7","addr":"0x0"}: vfio hostdev0: Failed to add fd 20 to KVM VFIO device: Invalid argument We need to wait for udev to finish processing all events. Signed-off-by: Pavel Hrdina <[email protected]> --- src/hypervisor/virhostdev.c | 3 +++ 1 file changed, 3 insertions(+)
Reviewed-by: Ján Tomko <[email protected]> Jano
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