diff --git a/executer/kernel/mcctrl/control.c b/executer/kernel/mcctrl/control.c
index 52d975fb..d578b756 100644
--- a/executer/kernel/mcctrl/control.c
+++ b/executer/kernel/mcctrl/control.c
@@ -1823,6 +1823,7 @@ int mcexec_open_exec(ihk_os_t os, char * __user filename)
 		retval = -ENOMEM;
 		goto out_put_file;
 	}
+	memset(mcef, 0, sizeof(struct mckernel_exec_file)); /* debug */
 
 	down(&mckernel_exec_file_lock);
 	/* Find previous file (if exists) and drop it */