diff options
| author | Wei Yang <richard.weiyang@gmail.com> | 2025-06-24 15:18:40 -0400 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-07-09 21:07:52 -0700 |
| commit | ea9b77f98d94c4d5c1bd1ac1db078f78b40e8bf5 (patch) | |
| tree | fa0e19624369cf1cd17f60839906666857ee0b12 | |
| parent | fea18c686320a53fce7ad62a87a3e1d10ad02f31 (diff) | |
maple_tree: fix mt_destroy_walk() on root leaf node
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>
| -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 00524e55a21e..ef66be963798 100644 --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -5319,6 +5319,7 @@ 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; } |