--- a/src/java.base/unix/native/libnet/NetworkInterface.c	Wed Sep 11 16:54:53 2019 +0200
+++ b/src/java.base/unix/native/libnet/NetworkInterface.c	Wed Sep 11 16:13:05 2019 +0200
@@ -239,6 +239,7 @@
 
     ifs = enumInterfaces(env);
     if (ifs == NULL) {
+        (*env)->ReleaseStringUTFChars(env, name, name_utf);
         return NULL;
     }