+ mm-mmap-remove-__vma_adjust-fix.patch added to mm-unstable branch

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

The patch titled
     Subject: mm/mmap: fix vma_merge() offset when expanding the next vma
has been added to the -mm mm-unstable branch.  Its filename is
     mm-mmap-remove-__vma_adjust-fix.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-mmap-remove-__vma_adjust-fix.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 R. Howlett" <Liam.Howlett@oracle.com>
Subject: mm/mmap: fix vma_merge() offset when expanding the next vma
Date: Mon, 30 Jan 2023 14:57:13 -0500

The vm_pgoff was being set incorrectly when expanding the next VMA to a
lower address.  Fix the issue by using the mid->vm_pgoff value for this
merge case (aka case 8).  Note that this does not change case 3's vm_pgoff
as next and mid are the same VMA.

Link: https://lkml.kernel.org/r/20230130195713.2881766-1-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Reported-by: Sanan Hasanov <sanan.hasanov@knights.ucf.edu>
  Link: https://lore.kernel.org/linux-mm/IA1PR07MB983017D2FBA174D2FF78CEB6ABCE9@IA1PR07MB9830.namprd07.prod.outlook.com/
Cc: Matthew Wilcox <willy@infradead.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---


--- a/mm/mmap.c~mm-mmap-remove-__vma_adjust-fix
+++ a/mm/mmap.c
@@ -977,7 +977,7 @@ struct vm_area_struct *vma_merge(struct
 			vma = next;			/* case 3 */
 			vma_start = addr;
 			vma_end = next->vm_end;
-			vma_pgoff = next->vm_pgoff;
+			vma_pgoff = mid->vm_pgoff;
 			err = 0;
 			if (mid != next) {		/* case 8 */
 				remove = mid;
_

Patches currently in -mm which might be from Liam.Howlett@oracle.com are

maple_tree-fix-handle-of-invalidated-state-in-mas_wr_store_setup.patch
maple_tree-fix-mas_prev-and-mas_find-state-handling.patch
ipc-shm-introduce-new-do_vma_munmap-to-munmap.patch
nommu-pass-through-vma-iterator-to-shrink_vma.patch
mm-damon-vaddr-testh-stop-using-vma_mas_store-for-maple-tree-store.patch
madvise-use-split_vma-instead-of-__split_vma-fix.patch
mm-change-munmap-splitting-order-and-move_vma-fix.patch
mm-mremap-convert-vma_adjust-to-vma_expand.patch
mm-mmap-remove-__vma_adjust-fix.patch