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Subject[PATCH v2 2/6] mm, hwpoison: fix page refcnt leaking in unpoison_memory()
Date
When free_raw_hwp_pages() fails its work, the refcnt of the hugetlb page
would have been incremented if ret > 0. Using put_page() to fix refcnt
leaking in this case.

Fixes: debb6b9c3fdd ("mm, hwpoison: make unpoison aware of raw error info in hwpoisoned hugepage")
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Acked-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
---
mm/memory-failure.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 9d1ebfef04ee..ecd42d717c6f 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -2378,6 +2378,7 @@ int unpoison_memory(unsigned long pfn)
count = free_raw_hwp_pages(page, false);
if (count == 0) {
ret = -EBUSY;
+ put_page(page);
goto unlock_mutex;
}
}
--
2.23.0
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