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mm/damon/vaddr: fix missing pte_unmap_unlock in damos_va_migrate_pmd_entry()

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If the PTE page table lock is acquired by pte_offset_map_lock(), the lock
must be released via pte_unmap_unlock().

However, in damos_va_migrate_pmd_entry(), if damos_va_filter_out() returns
true, it immediately returns without releasing the lock.

This fixes the issue by not stopping page table traversal when
damos_va_filter_out() returns true and ensuring that the lock is released.

Link: https://lkml.kernel.org/r/20251209151034.77221-1-akinobu.mita@gmail.com
Fixes: 09efc56a3b1c ("mm/damon/vaddr: consistently use only pmd_entry for damos_migrate")
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Akinobu Mita 2025-12-10 00:10:34 +09:00 committed by Andrew Morton
parent 612b595e08
commit 02129e623c
1 changed files with 1 additions and 1 deletions
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2
mm/damon/vaddr.c
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@ -743,7 +743,7 @@ huge_out:
if (!folio)
continue;
if (damos_va_filter_out(s, folio, walk->vma, addr, pte, NULL))
return 0;
continue;
damos_va_migrate_dests_add(folio, walk->vma, addr, dests,
migration_lists);
nr = folio_nr_pages(folio);