diff --git a/init/main.c b/init/main.c
index dd26a42e80a8..4fe58ed4aca7 100644
--- a/init/main.c
+++ b/init/main.c
@@ -380,6 +380,7 @@ static char * __init xbc_make_cmdline(const char *key)
 	ret = xbc_snprint_cmdline(new_cmdline, len + 1, root);
 	if (ret < 0 || ret > len) {
 		pr_err("Failed to print extra kernel cmdline.\n");
+		memblock_free(__pa(new_cmdline), len + 1);
 		return NULL;
 	}