Index: sys/dev/pci/virtio_pci.c
===================================================================
RCS file: /cvsroot/src/sys/dev/pci/virtio_pci.c,v
retrieving revision 1.11
diff -u -p -r1.11 virtio_pci.c
--- sys/dev/pci/virtio_pci.c	27 May 2020 11:24:31 -0000	1.11
+++ sys/dev/pci/virtio_pci.c	14 Sep 2020 15:00:44 -0000
@@ -701,7 +701,7 @@ retry:
 	}
 
 	if (pci_intr_type(pc, psc->sc_ihp[0]) == PCI_INTR_TYPE_MSIX) {
-		psc->sc_ihs = kmem_alloc(sizeof(*psc->sc_ihs) * nmsix,
+		psc->sc_ihs = kmem_zalloc(sizeof(*psc->sc_ihs) * nmsix,
 		    KM_SLEEP);
 
 		error = virtio_pci_setup_msix_interrupts(sc, &psc->sc_pa);
@@ -718,7 +718,7 @@ retry:
 		psc->sc_ihs_num = nmsix;
 		psc->sc_config_offset = VIRTIO_CONFIG_DEVICE_CONFIG_MSI;
 	} else if (pci_intr_type(pc, psc->sc_ihp[0]) == PCI_INTR_TYPE_INTX) {
-		psc->sc_ihs = kmem_alloc(sizeof(*psc->sc_ihs) * 1,
+		psc->sc_ihs = kmem_zalloc(sizeof(*psc->sc_ihs) * 1,
 		    KM_SLEEP);
 
 		error = virtio_pci_setup_intx_interrupt(sc, &psc->sc_pa);