diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index 47d0c95b9a01..250b4c67fac8 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -4333,6 +4333,9 @@ static inline bool mas_wr_append(struct ma_wr_state *wr_mas)
 	struct ma_state *mas = wr_mas->mas;
 	unsigned char node_pivots = mt_pivots[wr_mas->type];
 
+	if (mt_in_rcu(mas->tree))
+		return false;
+
 	if ((mas->index != wr_mas->r_min) && (mas->last == wr_mas->r_max)) {
 		if (new_end < node_pivots)
 			wr_mas->pivots[new_end] = wr_mas->pivots[end];