If this is not the right most node, we don't expect its last slot to be
NULL.
Let's validate this.
Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxx>
CC: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
CC: Sidhartha Kumar <sidhartha.kumar@xxxxxxxxxx>
CC: Lorenzo Stoakes <lorenzo.stoakes@xxxxxxxxxx>
---
lib/maple_tree.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index 98692704d773..2a00441130ee 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -7522,6 +7522,12 @@ static void mt_validate_nulls(struct maple_tree *mt)
MT_BUG_ON(mt, !last && !entry);
last = entry;
if (offset == mas_data_end(&mas)) {
+ if ((mas.max != ULONG_MAX) && !entry) {
+ pr_err("Last slot %p end with NULL\n",
+ mas_mn(&mas));
+ MT_BUG_ON(mas.tree, 1);
+ }
+
mas_next_node(&mas, mas_mn(&mas), ULONG_MAX);
if (mas_is_overflow(&mas))
return;
--
2.34.1
