From: Naoya Horiguchi <naoya.horiguchi@xxxxxxx> In already hwpoisoned case, memory_failure() is supposed to return with releasing the page refcount taken for error handling. But currently the refcount is not released when called with MF_COUNT_INCREASED, which makes page refcount inconsistent. This should be rare and non-critical, but it might be inconvenient in testing (unpoison doesn't work). Suggested-by: Miaohe Lin <linmiaohe@xxxxxxxxxx> Signed-off-by: Naoya Horiguchi <naoya.horiguchi@xxxxxxx> --- mm/memory-failure.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 2020944398c9..b2e32cdc3823 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1811,6 +1811,8 @@ int memory_failure(unsigned long pfn, int flags) res = -EHWPOISON; if (flags & MF_ACTION_REQUIRED) res = kill_accessing_process(current, pfn, flags); + if (flags & MF_COUNT_INCREASED) + put_page(p); goto unlock_mutex; } -- 2.25.1
