provider: VPN service can be null

diff --git a/src/provider.c b/src/provider.c
index 0d9139c..0bac230 100644 (file)
--- a/src/provider.c
+++ b/src/provider.c
@@ -459,8 +459,10 @@ static void unregister_provider(gpointer data)
 
        DBG("provider %p service %p", provider, provider->vpn_service);
 
-       connman_service_unref(provider->vpn_service);
-       provider->vpn_service = NULL;
+       if (provider->vpn_service != NULL) {
+               connman_service_unref(provider->vpn_service);
+               provider->vpn_service = NULL;
+       }
 
        connman_provider_unref(provider);
 }