Fix a spurious segfault when tearing down interfaces

Signed-off-by: Steven Barth <steven@midlink.org>

diff --git a/interface.c b/interface.c
index a4d7b8d..6ca1d0d 100644 (file)
--- a/interface.c
+++ b/interface.c
@@ -319,7 +319,7 @@ interface_cb(struct device_user *dep, enum device_event ev)
                new_state = true;
        case DEV_EVENT_REMOVE:
                interface_set_available(iface, new_state);
                new_state = true;
        case DEV_EVENT_REMOVE:
                interface_set_available(iface, new_state);

-               if (!new_state && dep->dev->external)
+               if (!new_state && dep->dev && dep->dev->external)

                        interface_set_main_dev(iface, NULL);
                break;
        case DEV_EVENT_UP:
                        interface_set_main_dev(iface, NULL);
                break;
        case DEV_EVENT_UP: