diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 88009cd2a846..e8024574a2d4 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -4226,6 +4226,9 @@ static __init int hugetlb_add_param(char *s, int (*setup)(char *))
 	size_t len;
 	char *p;
 
+	if (!s)
+		return -EINVAL;
+
 	if (hugetlb_param_index >= HUGE_MAX_CMDLINE_ARGS)
 		return -EINVAL;