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| author | Wei Yang <richard.weiyang@gmail.com> | 2025-06-24 15:18:40 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-07-17 18:37:13 +0200 |
| commit | 839d8682732e40056d9132f3da4e5386948a8776 (patch) | |
| tree | f8dedba6a03808215aa51222469d203a98855a81 | |
| parent | 92db42e201f41a11060a978a25816f0062b69c2a (diff) | |
maple_tree: fix mt_destroy_walk() on root leaf node
commit ea9b77f98d94c4d5c1bd1ac1db078f78b40e8bf5 upstream.
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.
Link: https://lore.kernel.org/all/20250407231354.11771-1-richard.weiyang@gmail.com/
Link: https://lkml.kernel.org/r/20250624191841.64682-1-Liam.Howlett@oracle.com
Fixes: 54a611b60590 ("Maple Tree: add new data structure")
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Reviewed-by: Dev Jain <dev.jain@arm.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | lib/maple_tree.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/maple_tree.c b/lib/maple_tree.c index 44441ec5b0af..59f83ece2024 100644 --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -5335,6 +5335,7 @@ 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; } |