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=-9.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED 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 08A3EC433DB for ; Wed, 3 Feb 2021 18:32:47 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 9B81B64F61 for ; Wed, 3 Feb 2021 18:32:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9B81B64F61 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+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=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:To:Subject:Message-ID:Date:From:In-Reply-To: References:MIME-Version:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=Gjri1RwfbA0qMlG8XCIl41zfkJ1fed9EVyUPjW1Gay4=; b=gC4j/flIAWiv2Sldv3Zh4xWTW vM405DEfe6koIiGWsd72Iz7Zffo5qED/at5ugAv2CqtDRWi22dOwg9SVudg63R18B6VKf6nI/Yw/h pvUbRzJTHxuBadVW0nJ5pihMhdnys0jBdlZgThLoJ8+2N6lBf78f7KYLE3UznxfXFQl/aWvbE+8mu VWcLcNANbVIO5mDWuuvezeaETNMjfJR0ehzBuVqKRhoNfAWHeQKK4vlSlWXR5oVRLSGu6GoqA5zq+ vJUGKxDTTzE7a2mkHs3mX1uhkuIVBzK3j+HRcizhkSCtlaJdE5yfR942HTPYMbNaH0P3HsMbVyYSL 6EIdaqwyg==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l7Mvx-0005Od-FX; Wed, 03 Feb 2021 18:31:21 +0000 Received: from mail.kernel.org ([198.145.29.99]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1l7Mvv-0005Nz-6O; Wed, 03 Feb 2021 18:31:20 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id 8C53A64E4A; Wed, 3 Feb 2021 18:31:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1612377076; bh=qgQXHCOO+dJ+yb7nrlrPLjaNfhwMNTK/2D37AWkM2GU=; h=References:In-Reply-To:From:Date:Subject:To:Cc:From; b=b4uhGDj52vIKbtPiEWqq6RhUatbEdurtjYlGgyr7LWPklmvbj2u1z3+Lx/k8RQt1T HZyqx68WLYsu0TznjDJ4lHXrDYntGoKDBbhRJbobky+2Wimi2VREIb0PAqlN2675og yel0vm/LPzBvVmayjkxbnfd1aLeDkst1I/ksdo8xNE7QQiN++Vk5S9f6/rE0g7RxVW CNsnE3vQA9eiJdh+dYpOaM1CJzZRrh8QDUsYjDhbx83MMfxkt4LlijKd+Ye5miJ6dO 32WsIbWjST/lwfcIqaPl5Q31R+Sr31uywgKs8ywZ/frDesQ3LJQKNykE3EdgTCIbqe qcRKP1h0Vzd9w== Received: by mail-oo1-f52.google.com with SMTP id y21so105147oot.12; Wed, 03 Feb 2021 10:31:16 -0800 (PST) X-Gm-Message-State: AOAM533+E+EaGZpg4WoV74ujzmhPB06eHZtFxzAEYCZC8ff2vDBBUNMy +3gjrpC4C1PJsvggOWQvAGU0S/og3UAZtKG5DO8= X-Google-Smtp-Source: ABdhPJzwd5KGkhGPt/OEU87BbYt91cpEEmblkRtD+YcxL6JmFSvKeQgDP7VxawLeDkwKP+ZjxzWQ0TT7IuF1t2mYdTQ= X-Received: by 2002:a05:6820:283:: with SMTP id q3mr2987191ood.13.1612377075690; Wed, 03 Feb 2021 10:31:15 -0800 (PST) MIME-Version: 1.0 References: <20210109103252.812517-1-lecopzer@gmail.com> In-Reply-To: <20210109103252.812517-1-lecopzer@gmail.com> From: Ard Biesheuvel Date: Wed, 3 Feb 2021 19:31:04 +0100 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH v2 0/4] arm64: kasan: support CONFIG_KASAN_VMALLOC To: Lecopzer Chen X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210203_133119_413874_9FC0306C X-CRM114-Status: GOOD ( 14.09 ) 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: Lecopzer Chen , Catalin Marinas , "Gustavo A. R. Silva" , Linux Memory Management List , Tyler Hicks , Alexander Potapenko , Vincenzo Frascino , Will Deacon , yj.chiang@mediatek.com, kasan-dev , Linux ARM , Andrey Ryabinin , Guenter Roeck , Andrey Konovalov , Mark Brown , linux-mediatek@lists.infradead.org, Dan Williams , Dmitry Vyukov , Linux Kernel Mailing List , Andrew Morton , Robin Murphy , Mike Rapoport Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Sat, 9 Jan 2021 at 11:33, Lecopzer Chen wrote: > > Linux supports KAsan for VMALLOC since commit 3c5c3cfb9ef4da9 > ("kasan: support backing vmalloc space with real shadow memory") > > Acroding to how x86 ported it [1], they early allocated p4d and pgd, > but in arm64 I just simulate how KAsan supports MODULES_VADDR in arm64 > by not to populate the vmalloc area except for kimg address. > > Test environment: > 4G and 8G Qemu virt, > 39-bit VA + 4k PAGE_SIZE with 3-level page table, > test by lib/test_kasan.ko and lib/test_kasan_module.ko > > It also works in Kaslr with CONFIG_RANDOMIZE_MODULE_REGION_FULL > and randomize module region inside vmalloc area. > > > [1]: commit 0609ae011deb41c ("x86/kasan: support KASAN_VMALLOC") > > Signed-off-by: Lecopzer Chen > Acked-by: Andrey Konovalov > Tested-by: Andrey Konovalov > > > v2 -> v1 > 1. kasan_init.c tweak indent > 2. change Kconfig depends only on HAVE_ARCH_KASAN > 3. support randomized module region. > > v1: > https://lore.kernel.org/lkml/20210103171137.153834-1-lecopzer@gmail.com/ > > Lecopzer Chen (4): > arm64: kasan: don't populate vmalloc area for CONFIG_KASAN_VMALLOC > arm64: kasan: abstract _text and _end to KERNEL_START/END > arm64: Kconfig: support CONFIG_KASAN_VMALLOC > arm64: kaslr: support randomized module area with KASAN_VMALLOC > I failed to realize that VMAP_STACK and KASAN are currently mutually exclusive on arm64, and that this series actually fixes that, which is a big improvement, so it would make sense to call that out. This builds and runs fine for me on a VM running under KVM. Tested-by: Ard Biesheuvel _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel