[merged mm-stable] selftests-mm-fix-bug_on-checking-wrong-variable-in-mremap_dontunmap.patch removed from -mm tree

The quilt patch titled
     Subject: selftests/mm: fix BUG_ON checking wrong variable in mremap_dontunmap
has been removed from the -mm tree.  Its filename was
     selftests-mm-fix-bug_on-checking-wrong-variable-in-mremap_dontunmap.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: Hongfu Li <[email protected]>
Subject: selftests/mm: fix BUG_ON checking wrong variable in mremap_dontunmap
Date: Fri, 17 Jul 2026 15:02:51 +0800

In mremap_dontunmap_partial_mapping_overwrite(), mremap() stores its
returned remapped address into remapped_mapping, while the BUG_ON
incorrectly checks dest_mapping instead.

If mremap() fails, dest_mapping still holds a valid pointer obtained from
the prior mmap() call, making this BUG_ON never trigger at all.  Correct
the check to validate the actual mremap() return value stored in
remapped_mapping.

Link: https://lore.kernel.org/[email protected]
Signed-off-by: Hongfu Li <[email protected]>
Reviewed-by: SJ Park <[email protected]>
Cc: David Hildenbrand <[email protected]>
Cc: Liam R. Howlett <[email protected]>
Cc: Lorenzo Stoakes <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Mike Rapoport <[email protected]>
Cc: Shuah Khan <[email protected]>
Cc: Suren Baghdasaryan <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---

 tools/testing/selftests/mm/mremap_dontunmap.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/tools/testing/selftests/mm/mremap_dontunmap.c~selftests-mm-fix-bug_on-checking-wrong-variable-in-mremap_dontunmap
+++ a/tools/testing/selftests/mm/mremap_dontunmap.c
@@ -313,7 +313,7 @@ static void mremap_dontunmap_partial_map
 	    mremap(source_mapping, 5 * page_size,
 		   5 * page_size,
 		   MREMAP_DONTUNMAP | MREMAP_MAYMOVE | MREMAP_FIXED, dest_mapping);
-	BUG_ON(dest_mapping == MAP_FAILED, "mremap");
+	BUG_ON(remapped_mapping == MAP_FAILED, "mremap");
 	BUG_ON(dest_mapping != remapped_mapping, "expected to remap to dest_mapping");
 
 	BUG_ON(check_region_contains_byte(source_mapping, 5 * page_size, 0) !=
_

Patches currently in -mm which might be from [email protected] are

mm-swap-fix-swap_cluster_lock-config_swap-stub-signature-mismatch.patch
ksm-update-comments-and-docs-to-reference-folio-mapping.patch
mm-use-a-folio-in-the-softleaf_is_device_private-path.patch
selftests-mm-drop-duplicate-test_seal_mprotect_two_vma_with_gap-call.patch
selftests-prctl-fix-non-anonymous-vma-mapping-in-set-anon-vma-name-test.patch