[merged mm-stable] mm-write-lock-vmas-before-removing-them-from-vma-tree.patch removed from -mm tree

[merged mm-stable] mm-write-lock-vmas-before-removing-them-from-vma-tree.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm: write-lock VMAs before removing them from VMA tree
has been removed from the -mm tree.  Its filename was
     mm-write-lock-vmas-before-removing-them-from-vma-tree.patch

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

------------------------------------------------------
From: Suren Baghdasaryan <surenb@google.com>
Subject: mm: write-lock VMAs before removing them from VMA tree
Date: Mon, 27 Feb 2023 09:36:17 -0800

Write-locking VMAs before isolating them ensures that page fault handlers
don't operate on isolated VMAs.

[surenb@google.com: mm/nommu: remove unnecessary VMA locking]
  Link: https://lkml.kernel.org/r/20230301190457.1498985-1-surenb@google.com
  Link: https://lore.kernel.org/all/Y%2F8CJQGNuMUTdLwP@localhost/
Link: https://lkml.kernel.org/r/20230227173632.3292573-19-surenb@google.com
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/mmap.c |    1 +
 1 file changed, 1 insertion(+)

--- a/mm/mmap.c~mm-write-lock-vmas-before-removing-them-from-vma-tree
+++ a/mm/mmap.c
@@ -2270,6 +2270,7 @@ int split_vma(struct vma_iterator *vmi,
 static inline int munmap_sidetree(struct vm_area_struct *vma,
 				   struct ma_state *mas_detach)
 {
+	vma_start_write(vma);
 	mas_set_range(mas_detach, vma->vm_start, vma->vm_end - 1);
 	if (mas_store_gfp(mas_detach, vma, GFP_KERNEL))
 		return -ENOMEM;
_

Patches currently in -mm which might be from surenb@google.com are