--- /dev/null
+From foo@baz Fri Jan 18 09:08:25 CET 2019
+Date: Fri, 18 Jan 2019 09:08:25 +0100
+To: Greg KH <gregkh@linuxfoundation.org>
+From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+Subject: test: runtime test
+
+If this gets noticed by the build/test infrastucture, then it is working properly.
+
+Don't merge this, for obvious reasons...
+
+diff --git a/init/main.c b/init/main.c
+index ee147103ba1b..1a3d722f25c2 100644
+--- a/init/main.c
++++ b/init/main.c
+@@ -1086,6 +1086,12 @@ static int __ref kernel_init(void *unused)
+
+ rcu_end_inkernel_boot();
+
++ /*
++ * If you notice this, your test infrastructure succeeded in finding a
++ * failure, congratulations
++ */
++ panic("boot canary hit");
++
+ if (ramdisk_execute_command) {
+ ret = run_init_process(ramdisk_execute_command);
+ if (!ret)