When trying to offline pages, HWPoisoned hugepage is migrated without
checking PageHWPoison first. So corrupted data could be consumed. Fix
it by deferring isolate_huge_page until PageHWPoison is handled.
Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
---
mm/memory_hotplug.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 4c6065e5d274..093f85ec5c5c 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1600,11 +1600,9 @@ do_migrate_range(unsigned long start_pfn, unsigned long end_pfn)
folio = page_folio(page);
head = &folio->page;
- if (PageHuge(page)) {
+ if (PageHuge(page))
pfn = page_to_pfn(head) + compound_nr(head) - 1;
- isolate_huge_page(head, &source);
- continue;
- } else if (PageTransHuge(page))
+ else if (PageTransHuge(page))
pfn = page_to_pfn(head) + thp_nr_pages(page) - 1;
/*
@@ -1622,6 +1620,11 @@ do_migrate_range(unsigned long start_pfn, unsigned long end_pfn)
continue;
}
+ if (PageHuge(page)) {
+ isolate_huge_page(head, &source);
+ continue;
+ }
+
if (!get_page_unless_zero(page))
continue;
/*
--
2.23.0
