From 2a2ce469b75086d1c80ccd23d213fb539b3728c4 Mon Sep 17 00:00:00 2001 From: "Liam R. Howlett" Date: Thu, 24 Nov 2022 10:49:27 -0500 Subject: [PATCH] maple_tree: Detect dead nodes in ma_data_end() If there is a dead node, then don't use any of the data and just return 0. The caller will need to validate the node is not dead before using the returned data anyways. Signed-off-by: Liam R. Howlett --- lib/maple_tree.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/lib/maple_tree.c b/lib/maple_tree.c index c5bbd2a07228..b254b8169694 100644 --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -1414,6 +1414,9 @@ static inline unsigned char ma_data_end(struct maple_node *node, { unsigned char offset; + if (unlikely(ma_dead_node(node))) + return 0; + if (type == maple_arange_64) return ma_meta_end(node, type); -- 2.50.1