The patch titled
Subject: mm/mmap: fix copy_vma() new_vma check
has been added to the -mm mm-unstable branch. Its filename is
mm-remove-the-vma-linked-list-fix-3.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-remove-the-vma-linked-list-fix-3.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Liam Howlett <liam.howlett@xxxxxxxxxx>
Subject: mm/mmap: fix copy_vma() new_vma check
Date: Wed, 6 Jul 2022 00:35:33 +0000
When checking new_vma limits to ensure they are not within where the copy
of the vma will be placed, ensure new_vma is not NULL.
Link: https://lkml.kernel.org/r/20220706003522.1827240-1-Liam.Howlett@xxxxxxxxxx
Fixes: ded0cf440d9b (mm: remove the vma linked list)
Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Reported-by: Yu Zhao <yuzhao@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/mmap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/mmap.c~mm-remove-the-vma-linked-list-fix-3
+++ a/mm/mmap.c
@@ -3347,7 +3347,7 @@ struct vm_area_struct *copy_vma(struct v
}
new_vma = find_vma_prev(mm, addr, &prev);
- if (new_vma->vm_start < addr + len)
+ if (new_vma && new_vma->vm_start < addr + len)
return NULL; /* should never get here */
new_vma = vma_merge(mm, prev, addr, addr + len, vma->vm_flags,
_
Patches currently in -mm which might be from liam.howlett@xxxxxxxxxx are
android-binder-fix-lockdep-check-on-clearing-vma.patch
maple-tree-add-new-data-structure-fix.patch
maple-tree-add-new-data-structure-fix-2.patch
maple-tree-add-new-data-structure-fix-3.patch
lib-test_maple_tree-add-testing-for-maple-tree-fix.patch
lib-test_maple_tree-add-testing-for-maple-tree-fix-2.patch
mm-remove-the-vma-linked-list-fix-3.patch
mm-mlock-drop-dead-code-in-count_mm_mlocked_page_nr.patch
