+ maple_tree-restart-walk-on-correct-status.patch added to mm-new branch

+ maple_tree-restart-walk-on-correct-status.patch added to mm-new branch

[Andrew Morton]

The patch titled
     Subject: maple_tree: restart walk on correct status
has been added to the -mm mm-new branch.  Its filename is
     maple_tree-restart-walk-on-correct-status.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/maple_tree-restart-walk-on-correct-status.patch

This patch will later appear in the mm-new branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
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------------------------------------------------------
From: Wei Yang <richard.weiyang@gmail.com>
Subject: maple_tree: restart walk on correct status
Date: Wed, 11 Jun 2025 01:12:52 +0000

Commit a8091f039c1e ("maple_tree: add MAS_UNDERFLOW and MAS_OVERFLOW
states") adds more status during maple tree walk.  But it introduce a typo
on the status check during walk.

It expects to mean neither active nor start, we would restart the walk,
while current code means we would always restart the walk.

Link: https://lkml.kernel.org/r/20250611011253.19515-3-richard.weiyang@gmail.com
Fixes: a8091f039c1e ("maple_tree: add MAS_UNDERFLOW and MAS_OVERFLOW states")
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 lib/maple_tree.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/lib/maple_tree.c~maple_tree-restart-walk-on-correct-status
+++ a/lib/maple_tree.c
@@ -4930,7 +4930,7 @@ void *mas_walk(struct ma_state *mas)
 {
 	void *entry;
 
-	if (!mas_is_active(mas) || !mas_is_start(mas))
+	if (!mas_is_active(mas) && !mas_is_start(mas))
 		mas->status = ma_start;
 retry:
 	entry = mas_state_walk(mas);
_

Patches currently in -mm which might be from richard.weiyang@gmail.com are

maple_tree-fix-mt_destroy_walk-on-root-leaf-node.patch
maple_tree-restart-walk-on-correct-status.patch
maple_tree-assert-retrieving-new-value-on-a-tree-containing-just-a-leaf-node.patch