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mm, hwpoison: fix page refcnt leaking in unpoison_memory()

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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.

Link: https://lkml.kernel.org/r/20220818130016.45313-3-linmiaohe@huawei.com
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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Miaohe Lin 2022-08-18 21:00:12 +08:00 • committed by Andrew Morton
parent f36a5543a7
commit 6bbabd041d
1 changed files with 1 additions and 0 deletions
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mm/memory-failure.c
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@ -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;
}
}