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 1A40EC7618B for ; Fri, 26 Jul 2019 13:19:36 +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 E2AFD218D4 for ; Fri, 26 Jul 2019 13:19:35 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="Y7Vp6u4j" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E2AFD218D4 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=IQgg55yE2p7zA0zBSomoUfudBG2R6ws9nBwx6zGMKS0=; b=Y7Vp6u4jZaNx0d FfvjlYhB7Pm770ut7NnTGWbJ3iNMasAoqqZZ22rBhpFckkXJVhKtItAnwwLpdikU0xshPdZEmmj+6 crvbM3FRaTCD9godNN7Xq7c/Cms2FgH18FgH2GZjoGFA52J2wZXRTW8CikyakOuyTq0FuDiFLMSPJ gN4Yx4PMQIDAAneL5hIfptTb9KT1zHc54talMALwD3fZzoDyMUxuT9PD9NZdrSbPH8muhVL0BIPNS imEll+8PPY3gopKS085WLl93iqNvPSf0wpXecwisNuEK9sz0CmfG2RIGdFfmwVTV4XX9aSiT3/Qnk rXWE+oa4s1EhSBg4Nf6Q==; 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 1hr08F-0001Mv-1n; Fri, 26 Jul 2019 13:19:35 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hr08A-0001L5-Bn; Fri, 26 Jul 2019 13:19:31 +0000 X-UUID: 2c774dd78dd846319f53ef16bec69147-20190726 X-UUID: 2c774dd78dd846319f53ef16bec69147-20190726 Received: from mtkcas67.mediatek.inc [(172.29.193.45)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 1418355721; Fri, 26 Jul 2019 05:19:27 -0800 Received: from MTKMBS06N1.mediatek.inc (172.21.101.129) by MTKMBS62DR.mediatek.inc (172.29.94.18) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Fri, 26 Jul 2019 06:19:26 -0700 Received: from mtkcas08.mediatek.inc (172.21.101.126) by mtkmbs06n1.mediatek.inc (172.21.101.129) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Fri, 26 Jul 2019 21:19:24 +0800 Received: from [172.21.84.99] (172.21.84.99) by mtkcas08.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Fri, 26 Jul 2019 21:19:24 +0800 Message-ID: <1564147164.515.10.camel@mtksdccf07> Subject: Re: [PATCH v3] kasan: add memory corruption identification for software tag-based mode From: Walter Wu To: Andrey Ryabinin Date: Fri, 26 Jul 2019 21:19:24 +0800 In-Reply-To: <71df2bd5-7bc8-2c82-ee31-3f68c3b6296d@virtuozzo.com> References: <20190613081357.1360-1-walter-zh.wu@mediatek.com> <1560447999.15814.15.camel@mtksdccf07> <1560479520.15814.34.camel@mtksdccf07> <1560744017.15814.49.camel@mtksdccf07> <1560774735.15814.54.camel@mtksdccf07> <1561974995.18866.1.camel@mtksdccf07> <1562640832.9077.32.camel@mtksdccf07> <1562839579.5846.12.camel@mtksdccf07> <37897fb7-88c1-859a-dfcc-0a5e89a642e0@virtuozzo.com> <1563160001.4793.4.camel@mtksdccf07> <9ab1871a-2605-ab34-3fd3-4b44a0e17ab7@virtuozzo.com> <1563789162.31223.3.camel@mtksdccf07> <1564144097.515.3.camel@mtksdccf07> <71df2bd5-7bc8-2c82-ee31-3f68c3b6296d@virtuozzo.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-20190726_061930_410814_BE383FD5 X-CRM114-Status: GOOD ( 11.08 ) 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 , "Jason A . Donenfeld" , Vasily Gorbik , Arnd Bergmann , Linux-MM , Andrey Konovalov , LKML , kasan-dev , Pekka Enberg , Martin Schwidefsky , Miles Chen , Alexander Potapenko , Linux ARM , David Rientjes , Matthias Brugger , linux-mediatek@lists.infradead.org, Christoph Lameter , Joonsoo Kim , 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 Fri, 2019-07-26 at 15:52 +0300, Andrey Ryabinin wrote: > > On 7/26/19 3:28 PM, Walter Wu wrote: > > On Fri, 2019-07-26 at 15:00 +0300, Andrey Ryabinin wrote: > >> > > > >>> > >>> > >>> I remember that there are already the lists which you concern. Maybe we > >>> can try to solve those problems one by one. > >>> > >>> 1. deadlock issue? cause by kmalloc() after kfree()? > >> > >> smp_call_on_cpu() > > > >>> 2. decrease allocation fail, to modify GFP_NOWAIT flag to GFP_KERNEL? > >> > >> No, this is not gonna work. Ideally we shouldn't have any allocations there. > >> It's not reliable and it hurts performance. > >> > > I dont know this meaning, we need create a qobject and put into > > quarantine, so may need to call kmem_cache_alloc(), would you agree this > > action? > > > > How is this any different from what you have now? I originally thought you already agreed the free-list(tag-based quarantine) after fix those issue. If no allocation there, i think maybe only move generic quarantine into tag-based kasan, but its memory consumption is more bigger our patch. what do you think? _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel