Index: sbin/mdmfs/mdmfs.c
===================================================================
--- sbin/mdmfs/mdmfs.c
+++ sbin/mdmfs/mdmfs.c
@@ -275,6 +275,7 @@
 		do_mdconfig_attach_au(mdconfig_arg, mdtype);
 	else
 		do_mdconfig_attach(mdconfig_arg, mdtype);
+	free(mdconfig_arg);
 	if (newfs)
 		do_newfs(newfs_arg);
 	do_mount(mount_arg, mtpoint);
@@ -408,6 +409,7 @@
 	strncpy(linebuf, linep + mdnamelen, linelen);
 	linebuf[linelen] = '\0';
 	ul = strtoul(linebuf, &p, 10);
+	free(linebuf);
 	if (ul == ULONG_MAX || *p != '\n')
 		errx(1, "unexpected output from mdconfig (attach)");
 	unit = ul;