| From | "Liam R. Howlett" <> | Subject | [PATCH v4 02/49] maple_tree: Fix potential rcu issue | Date | Fri, 20 Jan 2023 11:26:03 -0500 |
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From: "Liam R. Howlett" <Liam.Howlett@Oracle.com>
Ensure the node isn't dead after reading the node end.
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com> --- 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 cb8c03c4dce7..cbb8bd9b9d25 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; -- 2.35.1
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