The quilt patch titled Subject: maple_tree: fix get wrong data_end in mtree_lookup_walk() has been removed from the -mm tree. Its filename was maple_tree-fix-get-wrong-data_end-in-mtree_lookup_walk.patch

This patch was dropped because it was merged into the mm-hotfixes-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------ From: Peng Zhang zhangpeng.00@bytedance.com Subject: maple_tree: fix get wrong data_end in mtree_lookup_walk() Date: Tue, 14 Mar 2023 20:42:01 +0800

if (likely(offset > end)) max = pivots[offset];

The above code should be changed to if (likely(offset < end)), which is correct. This affects the correctness of ma_data_end(). Now it seems that the final result will not be wrong, but it is best to change it. This patch does not change the code as above, because it simplifies the code by the way.

Link: https://lkml.kernel.org/r/20230314124203.91572-1-zhangpeng.00@bytedance.com Link: https://lkml.kernel.org/r/20230314124203.91572-2-zhangpeng.00@bytedance.com Fixes: 54a611b60590 ("Maple Tree: add new data structure") Signed-off-by: Peng Zhang zhangpeng.00@bytedance.com Reviewed-by: Liam R. Howlett Liam.Howlett@oracle.com Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---

lib/maple_tree.c | 15 +++++---------- 1 file changed, 5 insertions(+), 10 deletions(-)

--- a/lib/maple_tree.c~maple_tree-fix-get-wrong-data_end-in-mtree_lookup_walk +++ a/lib/maple_tree.c @@ -3941,18 +3941,13 @@ static inline void *mtree_lookup_walk(st end = ma_data_end(node, type, pivots, max); if (unlikely(ma_dead_node(node))) goto dead_node; - - if (pivots[offset] >= mas->index) - goto next; - do { - offset++; - } while ((offset < end) && (pivots[offset] < mas->index)); - - if (likely(offset > end)) - max = pivots[offset]; + if (pivots[offset] >= mas->index) { + max = pivots[offset]; + break; + } + } while (++offset < end);

-next: slots = ma_slots(node, type); next = mt_slot(mas->tree, slots, offset); if (unlikely(ma_dead_node(node))) _

Patches currently in -mm which might be from zhangpeng.00@bytedance.com are

mm-kfence-improve-the-performance-of-__kfence_alloc-and-__kfence_free.patch maple_tree-simplify-mas_wr_node_walk.patch