From 016fdf7a08bdab98652e5250e2625452f0adfbd6 Mon Sep 17 00:00:00 2001 From: "Liam R. Howlett" Date: Thu, 17 Nov 2022 14:31:38 -0500 Subject: [PATCH] maple_tree: Fix potential rcu issue Ensure the node isn't dead after reading the node end. Signed-off-by: Liam R. Howlett --- lib/maple_tree.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/maple_tree.c b/lib/maple_tree.c index df352f6ccc24..ff28bd6d4745 100644 --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -4654,13 +4654,13 @@ static inline void *mas_next_nentry(struct ma_state *mas, pivots = ma_pivots(node, type); slots = ma_slots(node, type); mas->index = mas_safe_min(mas, pivots, mas->offset); + count = ma_data_end(node, type, pivots, mas->max); if (ma_dead_node(node)) return NULL; if (mas->index > max) return NULL; - count = ma_data_end(node, type, pivots, mas->max); if (mas->offset > count) return NULL; -- 2.49.0