Re: [syzbot] [kernel?] KMSAN: uninit-value in __flush_smp_call_function_queue

[Qing Wang]

#syz test

diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index 5aa4c9500018..0aecb4d523cd 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -3492,7 +3492,7 @@ static inline void mas_wr_node_store(struct ma_wr_state *wr_mas,
 	void __rcu **dst_slots;
 	unsigned long *dst_pivots;
 	unsigned char dst_offset, offset_end = wr_mas->offset_end;
-	struct maple_node reuse, *newnode;
+	struct maple_node reuse = {0}, *newnode;
 	unsigned char copy_size, node_pivots = mt_pivots[wr_mas->type];
 	bool in_rcu = mt_in_rcu(mas->tree);
 	unsigned char height = mas_mt_height(mas);