--- /usr/src/sys/boot/i386/gptboot/gptboot.c    2015-08-12 10:22:09.000000000 -0400
+++ gptboot.c   2016-02-05 21:09:12.000000000 -0500
@@ -159,9 +159,9 @@
                return (-1);
 
        autoboot = 1;
-       *cmd = '\0';
 
        for (;;) {
+               bzero(cmd, sizeof(cmd));
                *kname = '\0';
                if ((ino = lookup(PATH_CONFIG)) ||
                    (ino = lookup(PATH_DOTCONFIG)))