diff --git a/drivers/md/md-llbitmap.c b/drivers/md/md-llbitmap.c
index 845b8cd10f83..e1a783ee2032 100644
--- a/drivers/md/md-llbitmap.c
+++ b/drivers/md/md-llbitmap.c
@@ -1012,7 +1012,10 @@ static enum llbitmap_state llbitmap_state_machine(struct llbitmap *llbitmap,
 		llbitmap_init_state(llbitmap);
 		return BitNone;
 	}
-
+	if (start >= llbitmap->chunks)
+		return BitNone;
+	if (end >= llbitmap->chunks)
+		end = llbitmap->chunks - 1;
 	while (start <= end) {
 		enum llbitmap_state c = llbitmap_read(llbitmap, start);