Merge tag 'mm-hotfixes-stable-2023-04-07-16-23' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull MM fixes from Andrew Morton:
 "28 hotfixes.

  23 are cc:stable and the other five address issues which were
  introduced during this merge cycle.

  20 are for MM and the remainder are for other subsystems"

* tag 'mm-hotfixes-stable-2023-04-07-16-23' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (28 commits)
  maple_tree: fix a potential concurrency bug in RCU mode
  maple_tree: fix get wrong data_end in mtree_lookup_walk()
  mm/swap: fix swap_info_struct race between swapoff and get_swap_pages()
  nilfs2: fix sysfs interface lifetime
  mm: take a page reference when removing device exclusive entries
  mm: vmalloc: avoid warn_alloc noise caused by fatal signal
  nilfs2: initialize "struct nilfs_binfo_dat"->bi_pad field
  nilfs2: fix potential UAF of struct nilfs_sc_info in nilfs_segctor_thread()
  zsmalloc: document freeable stats
  zsmalloc: document new fullness grouping
  fsdax: force clear dirty mark if CoW
  mm/hugetlb: fix uffd wr-protection for CoW optimization path
  mm: enable maple tree RCU mode by default
  maple_tree: add RCU lock checking to rcu callback functions
  maple_tree: add smp_rmb() to dead node detection
  maple_tree: fix write memory barrier of nodes once dead for RCU mode
  maple_tree: remove extra smp_wmb() from mas_dead_leaves()
  maple_tree: fix freeing of nodes in rcu mode
  maple_tree: detect dead nodes in mas_start()
  maple_tree: be more cautious about dead nodes
  ...

1 files changed, 16 insertions, 0 deletions

diff --git a/tools/testing/radix-tree/maple.c b/tools/testing/radix-tree/maple.c
index 958ee9bdb316..4c89ff333f6f 100644
--- a/tools/testing/radix-tree/maple.c
+++ b/tools/testing/radix-tree/maple.c
@@ -108,6 +108,7 @@ static noinline void check_new_node(struct maple_tree *mt)
 	MT_BUG_ON(mt, mn->slot[1] != NULL);
 	MT_BUG_ON(mt, mas_allocated(&mas) != 0);
 
+	mn->parent = ma_parent_ptr(mn);
 	ma_free_rcu(mn);
 	mas.node = MAS_START;
 	mas_nomem(&mas, GFP_KERNEL);
@@ -160,6 +161,7 @@ static noinline void check_new_node(struct maple_tree *mt)
 		MT_BUG_ON(mt, mas_allocated(&mas) != i);
 		MT_BUG_ON(mt, !mn);
 		MT_BUG_ON(mt, not_empty(mn));
+		mn->parent = ma_parent_ptr(mn);
 		ma_free_rcu(mn);
 	}
 
@@ -192,6 +194,7 @@ static noinline void check_new_node(struct maple_tree *mt)
 		MT_BUG_ON(mt, not_empty(mn));
 		MT_BUG_ON(mt, mas_allocated(&mas) != i - 1);
 		MT_BUG_ON(mt, !mn);
+		mn->parent = ma_parent_ptr(mn);
 		ma_free_rcu(mn);
 	}
 
@@ -210,6 +213,7 @@ static noinline void check_new_node(struct maple_tree *mt)
 			mn = mas_pop_node(&mas);
 			MT_BUG_ON(mt, not_empty(mn));
 			MT_BUG_ON(mt, mas_allocated(&mas) != j - 1);
+			mn->parent = ma_parent_ptr(mn);
 			ma_free_rcu(mn);
 		}
 		MT_BUG_ON(mt, mas_allocated(&mas) != 0);
@@ -233,6 +237,7 @@ static noinline void check_new_node(struct maple_tree *mt)
 			MT_BUG_ON(mt, mas_allocated(&mas) != i - j);
 			mn = mas_pop_node(&mas);
 			MT_BUG_ON(mt, not_empty(mn));
+			mn->parent = ma_parent_ptr(mn);
 			ma_free_rcu(mn);
 			MT_BUG_ON(mt, mas_allocated(&mas) != i - j - 1);
 		}
@@ -269,6 +274,7 @@ static noinline void check_new_node(struct maple_tree *mt)
 			mn = mas_pop_node(&mas); /* get the next node. */
 			MT_BUG_ON(mt, mn == NULL);
 			MT_BUG_ON(mt, not_empty(mn));
+			mn->parent = ma_parent_ptr(mn);
 			ma_free_rcu(mn);
 		}
 		MT_BUG_ON(mt, mas_allocated(&mas) != 0);
@@ -294,6 +300,7 @@ static noinline void check_new_node(struct maple_tree *mt)
 			mn = mas_pop_node(&mas2); /* get the next node. */
 			MT_BUG_ON(mt, mn == NULL);
 			MT_BUG_ON(mt, not_empty(mn));
+			mn->parent = ma_parent_ptr(mn);
 			ma_free_rcu(mn);
 		}
 		MT_BUG_ON(mt, mas_allocated(&mas2) != 0);
@@ -334,10 +341,12 @@ static noinline void check_new_node(struct maple_tree *mt)
 	MT_BUG_ON(mt, mas_allocated(&mas) != MAPLE_ALLOC_SLOTS + 2);
 	mn = mas_pop_node(&mas);
 	MT_BUG_ON(mt, not_empty(mn));
+	mn->parent = ma_parent_ptr(mn);
 	ma_free_rcu(mn);
 	for (i = 1; i <= MAPLE_ALLOC_SLOTS + 1; i++) {
 		mn = mas_pop_node(&mas);
 		MT_BUG_ON(mt, not_empty(mn));
+		mn->parent = ma_parent_ptr(mn);
 		ma_free_rcu(mn);
 	}
 	MT_BUG_ON(mt, mas_allocated(&mas) != 0);
@@ -375,6 +384,7 @@ static noinline void check_new_node(struct maple_tree *mt)
 		mas_node_count(&mas, i); /* Request */
 		mas_nomem(&mas, GFP_KERNEL); /* Fill request */
 		mn = mas_pop_node(&mas); /* get the next node. */
+		mn->parent = ma_parent_ptr(mn);
 		ma_free_rcu(mn);
 		mas_destroy(&mas);
 
@@ -382,10 +392,13 @@ static noinline void check_new_node(struct maple_tree *mt)
 		mas_node_count(&mas, i); /* Request */
 		mas_nomem(&mas, GFP_KERNEL); /* Fill request */
 		mn = mas_pop_node(&mas); /* get the next node. */
+		mn->parent = ma_parent_ptr(mn);
 		ma_free_rcu(mn);
 		mn = mas_pop_node(&mas); /* get the next node. */
+		mn->parent = ma_parent_ptr(mn);
 		ma_free_rcu(mn);
 		mn = mas_pop_node(&mas); /* get the next node. */
+		mn->parent = ma_parent_ptr(mn);
 		ma_free_rcu(mn);
 		mas_destroy(&mas);
 	}
@@ -35369,6 +35382,7 @@ static noinline void check_prealloc(struct maple_tree *mt)
 	MT_BUG_ON(mt, allocated != 1 + height * 3);
 	mn = mas_pop_node(&mas);
 	MT_BUG_ON(mt, mas_allocated(&mas) != allocated - 1);
+	mn->parent = ma_parent_ptr(mn);
 	ma_free_rcu(mn);
 	MT_BUG_ON(mt, mas_preallocate(&mas, GFP_KERNEL) != 0);
 	mas_destroy(&mas);
@@ -35386,6 +35400,7 @@ static noinline void check_prealloc(struct maple_tree *mt)
 	mas_destroy(&mas);
 	allocated = mas_allocated(&mas);
 	MT_BUG_ON(mt, allocated != 0);
+	mn->parent = ma_parent_ptr(mn);
 	ma_free_rcu(mn);
 
 	MT_BUG_ON(mt, mas_preallocate(&mas, GFP_KERNEL) != 0);
@@ -35756,6 +35771,7 @@ void farmer_tests(void)
 	tree.ma_root = mt_mk_node(node, maple_leaf_64);
 	mt_dump(&tree);
 
+	node->parent = ma_parent_ptr(node);
 	ma_free_rcu(node);
 
 	/* Check things that will make lockdep angry */