From: Andrew Morton <akpm@linux-foundation.org> mainline inclusion from mainline-v6.11-rc1 commit d40f74ab9d6158979a20957ead0e0dec7040ec37 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IAIHQO Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... -------------------------------- Fix used-uninitialized of `page'. Fixes: dce7d10be4bb ("mm/madvise: optimize lazyfreeing with mTHP in madvise_free") Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202406260514.SLhNM9kQ-lkp@intel.com Cc: Lance Yang <ioworker0@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Liu Shixin <liushixin2@huawei.com> --- mm/huge_memory.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 429b9cacbaa6..4c9111c70d65 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -2879,7 +2879,6 @@ static bool __discard_anon_folio_pmd_locked(struct vm_area_struct *vma, struct mm_struct *mm = vma->vm_mm; int ref_count, map_count; pmd_t orig_pmd = *pmdp; - struct page *page; if (folio_test_dirty(folio) || pmd_dirty(orig_pmd)) return false; @@ -2915,7 +2914,7 @@ static bool __discard_anon_folio_pmd_locked(struct vm_area_struct *vma, return false; } - folio_remove_rmap_pmd(folio, page, vma); + folio_remove_rmap_pmd(folio, pmd_page(orig_pmd), vma); zap_deposited_table(mm, pmdp); add_mm_counter(mm, MM_ANONPAGES, -HPAGE_PMD_NR); if (vma->vm_flags & VM_LOCKED) -- 2.25.1