diff -Nupr src.orig/net/core/dev.c src/net/core/dev.c
--- src.orig/net/core/dev.c	2016-11-30 19:51:04.367178250 +0000
+++ src/net/core/dev.c	2016-11-30 19:51:13.914178250 +0000
@@ -3547,6 +3547,7 @@ ncls:
 		case RX_HANDLER_PASS:
 			break;
 		default:
+			printk("BUG!\n");
 			BUG();
 		}
 	}