+ maple_tree-fix-handle-of-invalidated-state-in-mas_wr_store_setup.patch added to mm-hotfixes-unstable branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: maple_tree: fix handle of invalidated state in mas_wr_store_setup()
has been added to the -mm mm-hotfixes-unstable branch.  Its filename is
     maple_tree-fix-handle-of-invalidated-state-in-mas_wr_store_setup.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/maple_tree-fix-handle-of-invalidated-state-in-mas_wr_store_setup.patch

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

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------------------------------------------------------
From: Liam Howlett <liam.howlett@oracle.com>
Subject: maple_tree: fix handle of invalidated state in mas_wr_store_setup()
Date: Mon, 9 Jan 2023 16:55:42 +0000

If an invalidated maple state is encountered during write, reset the maple
state to MAS_START.  This will result in a re-walk of the tree to the
correct location for the write.

Link: https://lore.kernel.org/all/20230107020126.1627-1-sj@kernel.org/
Link: https://lkml.kernel.org/r/20230109165455.647400-1-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Reported-by: SeongJae Park <sj@kernel.org>
Tested-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 lib/maple_tree.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/lib/maple_tree.c~maple_tree-fix-handle-of-invalidated-state-in-mas_wr_store_setup
+++ a/lib/maple_tree.c
@@ -5610,6 +5610,9 @@ static inline void mte_destroy_walk(stru
 
 static void mas_wr_store_setup(struct ma_wr_state *wr_mas)
 {
+	if (unlikely(mas_is_paused(wr_mas->mas)))
+		mas_reset(wr_mas->mas);
+
 	if (!mas_is_start(wr_mas->mas)) {
 		if (mas_is_none(wr_mas->mas)) {
 			mas_reset(wr_mas->mas);
_

Patches currently in -mm which might be from liam.howlett@oracle.com are

nommu-fix-memory-leak-in-do_mmap-error-path.patch
nommu-fix-do_munmap-error-path.patch
nommu-fix-split_vma-map_count-error.patch
maple_tree-fix-handle-of-invalidated-state-in-mas_wr_store_setup.patch
mm-add-temporary-vma-iterator-versions-of-vma_merge-split_vma-and-__split_vma-fix.patch
maple_tree-remove-gfp_zero-from-kmem_cache_alloc-and-kmem_cache_alloc_bulk.patch