The quilt patch titled
Subject: mm: memory-failure: ensure moving HWPoison flag to the raw error pages
has been removed from the -mm tree. Its filename was
mm-memory-failure-ensure-moving-hwpoison-flag-to-the-raw-error-pages.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: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Subject: mm: memory-failure: ensure moving HWPoison flag to the raw error pages
Date: Tue, 11 Jul 2023 13:50:10 +0800
If hugetlb_vmemmap_optimized is enabled, folio_clear_hugetlb_hwpoison()
called from try_memory_failure_hugetlb() won't transfer HWPoison flag to
subpages while folio's HWPoison flag is cleared. So when trying to free
this hugetlb page into buddy, folio_clear_hugetlb_hwpoison() is not called
to move HWPoison flag from head page to the raw error pages even if now
hugetlb_vmemmap_optimized is cleared. This will results in HWPoisoned
page being used again and raw_hwp_page leak.
Link: https://lkml.kernel.org/r/20230711055016.2286677-3-linmiaohe@xxxxxxxxxx
Fixes: ac5fcde0a96a ("mm, hwpoison: make unpoison aware of raw error info in hwpoisoned hugepage")
Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Acked-by: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory-failure.c | 2 ++
1 file changed, 2 insertions(+)
--- a/mm/memory-failure.c~mm-memory-failure-ensure-moving-hwpoison-flag-to-the-raw-error-pages
+++ a/mm/memory-failure.c
@@ -1908,6 +1908,8 @@ void folio_clear_hugetlb_hwpoison(struct
{
if (folio_test_hugetlb_raw_hwp_unreliable(folio))
return;
+ if (folio_test_hugetlb_vmemmap_optimized(folio))
+ return;
folio_clear_hwpoison(folio);
folio_free_raw_hwp(folio, true);
}
_
Patches currently in -mm which might be from linmiaohe@xxxxxxxxxx are
mm-memory-failure-fix-unexpected-return-value-in-soft_offline_page.patch
mm-memory-failure-fix-potential-page-refcnt-leak-in-memory_failure.patch
mm-memcg-fix-obsolete-function-name-in-mem_cgroup_protection.patch
mm-memory-failure-add-pageoffline-check.patch
mm-page_alloc-avoid-unneeded-alike_pages-calculation.patch
mm-memcg-update-obsolete-comment-above-parent_mem_cgroup.patch
mm-page_alloc-remove-unneeded-variable-base.patch
mm-memcg-fix-wrong-function-name-above-obj_cgroup_charge_zswap.patch
mm-memory-failure-use-helper-macro-llist_for_each_entry_safe.patch
mm-mm_init-use-helper-macro-bits_per_long-and-bits_per_byte.patch
