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=-2.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,UNPARSEABLE_RELAY,URIBL_BLOCKED,USER_AGENT_SANE_2 autolearn=no 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 AFAC1C3A5A7 for ; Wed, 4 Sep 2019 14:16:53 +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 83FD722CED for ; Wed, 4 Sep 2019 14:16:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="irKMrayW" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 83FD722CED 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:References:In-Reply-To: Date:To:From:Subject:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=B+NkVG4wxAWdysMRRRZ2hAul/1r73HmOLPDIZcSbpg0=; b=irKMrayWtjff4F MFk8cWZ813x66FUu4BUtD3xDcds7iNSK5AErG1IwEMgoeRBVRbJ9GGyJmL9QNPdKPDdqG6pNwQt7h xv/lBtEL/APBc0l22BkDOPOHbccQHSxUe1A043DCiIuiT1niLSkVMhzyqwPt6Wyqygh48s/HWB0Cj eADrlGJsyP3T65ZXLnsgPjJ5v2YEf1ECosC/ywVsMLyVD5bmRM6eONwgCr13rLc8ZQnHXrqBXax7f JzVB/07Bx+zWY21kXfHK9Np5sdS8Yzea/bue+zGpjJThxLIsanOuJz6lO3y+CCnKinP3q3kuG5ysR n8wNqDGGHnzaZQYJ8dsg==; 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 1i5W5Z-0000bY-FQ; Wed, 04 Sep 2019 14:16:49 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1i5W5V-0000ZC-Dc; Wed, 04 Sep 2019 14:16:46 +0000 X-UUID: 02821038e83e4a5eb2d3a1d6bbd2757e-20190904 X-UUID: 02821038e83e4a5eb2d3a1d6bbd2757e-20190904 Received: from mtkcas67.mediatek.inc [(172.29.193.45)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 1552694937; Wed, 04 Sep 2019 06:16:40 -0800 Received: from mtkmbs07n1.mediatek.inc (172.21.101.16) by MTKMBS62DR.mediatek.inc (172.29.94.18) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Wed, 4 Sep 2019 07:16:39 -0700 Received: from mtkcas09.mediatek.inc (172.21.101.178) by mtkmbs07n1.mediatek.inc (172.21.101.16) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Wed, 4 Sep 2019 22:16:38 +0800 Received: from [172.21.84.99] (172.21.84.99) by mtkcas09.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Wed, 4 Sep 2019 22:16:30 +0800 Message-ID: <1567606591.32522.21.camel@mtksdccf07> Subject: Re: [PATCH 1/2] mm/kasan: dump alloc/free stack for page allocator From: Walter Wu To: Andrey Konovalov Date: Wed, 4 Sep 2019 22:16:31 +0800 In-Reply-To: References: <20190904065133.20268-1-walter-zh.wu@mediatek.com> X-Mailer: Evolution 3.2.3-0ubuntu6 MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190904_071645_465614_22FA2BD9 X-CRM114-Status: GOOD ( 13.27 ) 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: wsd_upstream@mediatek.com, Arnd Bergmann , Linux Memory Management List , linux-mediatek@lists.infradead.org, LKML , kasan-dev , Martin Schwidefsky , Alexander Potapenko , Linux ARM , Matthias Brugger , Andrey Ryabinin , Andrew Morton , Dmitry Vyukov 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 On Wed, 2019-09-04 at 15:44 +0200, Andrey Konovalov wrote: > On Wed, Sep 4, 2019 at 8:51 AM Walter Wu wrote: > > +config KASAN_DUMP_PAGE > > + bool "Dump the page last stack information" > > + depends on KASAN && PAGE_OWNER > > + help > > + By default, KASAN doesn't record alloc/free stack for page allocator. > > + It is difficult to fix up page use-after-free issue. > > + This feature depends on page owner to record the last stack of page. > > + It is very helpful for solving the page use-after-free or out-of-bound. > > I'm not sure if we need a separate config for this. Is there any > reason to not have this enabled by default? PAGE_OWNER need some memory usage, it is not allowed to enable by default in low RAM device. so I create new feature option and the person who wants to use it to enable it. Thanks. Walter _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel