From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 96511C433EF for ; Mon, 9 Sep 2019 08:53:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6F89121920 for ; Mon, 9 Sep 2019 08:53:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389557AbfIIIxv (ORCPT ); Mon, 9 Sep 2019 04:53:51 -0400 Received: from mailgw01.mediatek.com ([210.61.82.183]:64173 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S2389047AbfIIIxu (ORCPT ); Mon, 9 Sep 2019 04:53:50 -0400 X-UUID: 0052279582b546f0bf7107861527c82a-20190909 X-UUID: 0052279582b546f0bf7107861527c82a-20190909 Received: from mtkcas06.mediatek.inc [(172.21.101.30)] by mailgw01.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.10 Build 0809 with TLS) with ESMTP id 1143796525; Mon, 09 Sep 2019 16:53:42 +0800 Received: from mtkcas08.mediatek.inc (172.21.101.126) by mtkmbs07n1.mediatek.inc (172.21.101.16) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 9 Sep 2019 16:53:40 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas08.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Mon, 9 Sep 2019 16:53:40 +0800 From: Walter Wu To: Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , Matthias Brugger , Andrew Morton , Martin Schwidefsky , Will Deacon , Andrey Konovalov , Arnd Bergmann , Thomas Gleixner , Michal Hocko , Qian Cai CC: , , , , , , Walter Wu Subject: [PATCH v2 1/2] mm/page_ext: support to record the last stack of page Date: Mon, 9 Sep 2019 16:53:39 +0800 Message-ID: <20190909085339.25350-1-walter-zh.wu@mediatek.com> X-Mailer: git-send-email 2.18.0 MIME-Version: 1.0 Content-Type: text/plain X-MTK: N Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org KASAN will record last stack of page in order to help programmer to see memory corruption caused by page. What is difference between page_owner and our patch? page_owner records alloc stack of page, but our patch is to record last stack(it may be alloc or free stack of page). Signed-off-by: Walter Wu --- mm/page_ext.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/mm/page_ext.c b/mm/page_ext.c index 5f5769c7db3b..7ca33dcd9ffa 100644 --- a/mm/page_ext.c +++ b/mm/page_ext.c @@ -65,6 +65,9 @@ static struct page_ext_operations *page_ext_ops[] = { #if defined(CONFIG_IDLE_PAGE_TRACKING) && !defined(CONFIG_64BIT) &page_idle_ops, #endif +#ifdef CONFIG_KASAN + &page_stack_ops, +#endif }; static unsigned long total_usage; -- 2.18.0