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=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,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 E3708C00307 for ; Mon, 9 Sep 2019 08:53:55 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B9AF521920 for ; Mon, 9 Sep 2019 08:53:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="C2rnmCu6" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B9AF521920 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=YhSf3n2ZTz5GwslNxMhm/zCTqbVen6p536b4lb3UU9k=; b=C2rnmCu64QVVLS /Iwa8NqBh9nzuH35XgI63w+YAttM8geJzsewLT4OXJBfiIuQpGYB2IBLi8RLzn5ogYAum759pxdZG xYKkG5RyCLfq9TBHoSKKth4hhLSiW+C5XE+lSNjmda55DFfkGRz6TrgDp9ejW2k1uxJivxTd3GKVP nBFn4fTSQfjVj9UC27gt4E3lnStDuHBJFjD4PgNSWoNEcZns1McbT9zrwmrFA0UMN5yT1kQO2YHo0 mwcLEgaigHrj9b4+J+90RB+YhT1uZ9nTCaVMcDKXpqOeXs3vj3pTDEl5VErLs1g2z72qwSC7QCuPA WwzgOWs6gHmCmRWerYzg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1i7FQk-0003N0-LK; Mon, 09 Sep 2019 08:53:50 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1i7FQf-0003LX-Sc; Mon, 09 Sep 2019 08:53:47 +0000 X-UUID: 861095aafaba4060b8a88ce07922ab73-20190909 X-UUID: 861095aafaba4060b8a88ce07922ab73-20190909 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 1742872989; Mon, 09 Sep 2019 00:53:43 -0800 Received: from mtkmbs07n1.mediatek.inc (172.21.101.16) by MTKMBS62N1.mediatek.inc (172.29.193.41) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 9 Sep 2019 01:53:42 -0700 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 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 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190909_015345_923975_D1E86500 X-CRM114-Status: UNSURE ( 9.27 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Walter Wu , wsd_upstream@mediatek.com, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, linux-mm@kvack.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.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 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel