The udevInterfaceGetXMLDesc method takes a reference on the udev driver as its first action. If the virCheckFlags() condition fails, however, this reference is never released. Signed-off-by: Daniel P. Berrangé <berrange(a)redhat.com&gt; --- src/interface/interface_backend_udev.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/src/interface/interface_backend_udev.c b/src/interface/interface_backend_udev.c index fdf11a8318..e1a50389c9 100644 --- a/src/interface/interface_backend_udev.c +++ b/src/interface/interface_backend_udev.c @@ -1027,12 +1027,14 @@ static char * udevInterfaceGetXMLDesc(virInterfacePtr ifinfo, unsigned int flags) { - struct udev *udev = udev_ref(driver->udev); + struct udev *udev = NULL; g_autoptr(virInterfaceDef) ifacedef = NULL; char *xmlstr = NULL; virCheckFlags(VIR_INTERFACE_XML_INACTIVE, NULL); + udev = udev_ref(driver->udev); + /* Recursively build up the interface XML based on the requested * interface name */ -- 2.45.1