On destroy, we should set each node dead. But current code miss this
when the maple tree has only the root node.
The reason is mt_destroy_walk() leverage mte_destroy_descend() to set
node dead, but this is skipped since the only root node is a leaf.
Fixes this by setting the node dead if it is a leaf.
Fixes: 54a611b60590 ("Maple Tree: add new data structure")
Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxx>
CC: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
---
v2:
* move the operation into mt_destroy_walk()
* adjust the title accordingly
---
lib/maple_tree.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index 4bd5a5be1440..0696e8d1c4e9 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -5284,6 +5284,7 @@ static void mt_destroy_walk(struct maple_enode *enode, struct maple_tree *mt,
struct maple_enode *start;
if (mte_is_leaf(enode)) {
+ mte_set_node_dead(enode);
node->type = mte_node_type(enode);
goto free_leaf;
}
--
2.34.1
