From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:53826 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754537AbbIKWtl (ORCPT ); Fri, 11 Sep 2015 18:49:41 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Wanpeng Li , Naoya Horiguchi , Andrew Morton , Linus Torvalds Subject: [PATCH 3.14 03/18] mm/hwpoison: fix page refcount of unknown non LRU page Date: Fri, 11 Sep 2015 15:49:21 -0700 Message-Id: <20150911224628.409914263@linuxfoundation.org> In-Reply-To: <20150911224628.222793657@linuxfoundation.org> References: <20150911224628.222793657@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Sender: stable-owner@vger.kernel.org List-ID: 3.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Wanpeng Li commit 4f32be677b124a49459e2603321c7a5605ceb9f8 upstream. After trying to drain pages from pagevec/pageset, we try to get reference count of the page again, however, the reference count of the page is not reduced if the page is still not on LRU list. Fix it by adding the put_page() to drop the page reference which is from __get_any_page(). Signed-off-by: Wanpeng Li Acked-by: Naoya Horiguchi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Greg Kroah-Hartman --- mm/memory-failure.c | 2 ++ 1 file changed, 2 insertions(+) --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1510,6 +1510,8 @@ static int get_any_page(struct page *pag */ ret = __get_any_page(page, pfn, 0); if (!PageLRU(page)) { + /* Drop page reference which is from __get_any_page() */ + put_page(page); pr_info("soft_offline: %#lx: unknown non LRU page type %lx\n", pfn, page->flags); return -EIO;