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@xxxxxxxxxx>
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@xxxxxxxxxx
Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Reported-by: Sanan Hasanov <sanan.hasanov@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/linux-mm/IA1PR07MB983017D2FBA174D2FF78CEB6ABCE9@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- 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@xxxxxxxxxx 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
