* Wei Yang richard.weiyang@gmail.com [250407 19:14]:
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@gmail.com CC: Liam R. Howlett Liam.Howlett@Oracle.com Cc: stable@vger.kernel.org
Reviewed-by: Liam R. Howlett Liam.Howlett@Oracle.com
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);-- 2.34.1