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=-6.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,HK_RANDOM_FROM,MAILING_LIST_MULTI, MSGID_FROM_MTA_HEADER,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 DA1B5C43465 for ; Mon, 21 Sep 2020 02:41:34 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 560F52078E for ; Mon, 21 Sep 2020 02:41:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=bushare.onmicrosoft.com header.i=@bushare.onmicrosoft.com header.b="vYgxnJxy" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 560F52078E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bu.edu Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:49334 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kKBll-0003s8-Eg for qemu-devel@archiver.kernel.org; Sun, 20 Sep 2020 22:41:33 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:43458) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kKBkk-0003Ma-DC for qemu-devel@nongnu.org; Sun, 20 Sep 2020 22:40:30 -0400 Received: from mail-co1nam11on2133.outbound.protection.outlook.com ([40.107.220.133]:31457 helo=NAM11-CO1-obe.outbound.protection.outlook.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kKBkf-00039Q-7E for qemu-devel@nongnu.org; Sun, 20 Sep 2020 22:40:28 -0400 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=VqC98MzAJnRd0EOKR3rAwLJcvvm976/VGFCRCjapuDgwVYGVS9EYJRjO3yWuCIr3+qVnRHp4tAJuyNlgEU38VtAdC+SJS+lGYxdQttkRkZE1qIKCYKXA8qLU3Q1VTmeJLsfkPubPAcdZ6Hw6Q/EmldNsnijlNEQOeAjX3cHPkUD634PKYuH9v8BObAope7bOioWLTzu2YJZnj/PlNyPdgOq7UxmFs1fztioFH+lKD9HRvasjSu4+FrDzKP4yfuCd2OpG98vUVNdhl1pCnyPFaYXVgxHkW2xZU41ySmQ3lrJMEOQcNFUFrjfMvK9/gHR57E/l9dD6311cCE2v4kEIbw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=6OoJB9jrz2YdMM1ULMIcRzUCg32MxdWxLiMW7Le64qk=; b=TP75GTIdczKZyyYd0dwkyn8zK+YSJhVFaTHOkCjtW7neFdf/+v5qq84dsJbliD7lUU2A0YDQ02B46TIegohWni8JuyO55IX6y+241953RKhIOOAAQuRwCDsQMK+5qH71f18ZVGege+9TwWrVcoio//ZHyDFRrbIUwuWGHblMD0S1QyghT3tO4OnBdEGsqjmCApboo3oEhNgM7H1hZuLgVITYYRePlNCShPAcDI0ArqJw8NuARstN3ZtMYsQtNE5oPLKijdc/08s781b77dduLufHfVcGI4aW4dRN4kBgjR7vlwKpzFTe4I9WdTX0+yDKbsjzicJHe/sBEHD8DNFB/A== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=bu.edu; dmarc=pass action=none header.from=bu.edu; dkim=pass header.d=bu.edu; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bushare.onmicrosoft.com; s=selector2-bushare-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=6OoJB9jrz2YdMM1ULMIcRzUCg32MxdWxLiMW7Le64qk=; b=vYgxnJxyKQeaVsZ1pa7M/n6W+d6b5idBT8SJeRLK9SKVjkxV6DvvgbcQVGU7w3+n9XlXOCua9X2+3e95z78xYEM7rWwA5TBltcm2Y049GSKzCXokYJ7eXpHAPsY477skrR6nVqtyOauRWL+akn1Xi6iR9ZexL1ixrGJJxfKsovA= Authentication-Results: nongnu.org; dkim=none (message not signed) header.d=none;nongnu.org; dmarc=none action=none header.from=bu.edu; Received: from SN6PR03MB3871.namprd03.prod.outlook.com (2603:10b6:805:6d::32) by SN2PR03MB2237.namprd03.prod.outlook.com (2603:10b6:804:e::27) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3391.11; Mon, 21 Sep 2020 02:25:19 +0000 Received: from SN6PR03MB3871.namprd03.prod.outlook.com ([fe80::61ae:93a8:b26c:77b8]) by SN6PR03MB3871.namprd03.prod.outlook.com ([fe80::61ae:93a8:b26c:77b8%4]) with mapi id 15.20.3391.024; Mon, 21 Sep 2020 02:25:19 +0000 From: Alexander Bulekov To: qemu-devel@nongnu.org Subject: [PATCH v3 00/16] Add a General Virtual Device Fuzzer Date: Sun, 20 Sep 2020 22:24:50 -0400 Message-Id: <20200921022506.873303-1-alxndr@bu.edu> X-Mailer: git-send-email 2.28.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: BL0PR1501CA0034.namprd15.prod.outlook.com (2603:10b6:207:17::47) To SN6PR03MB3871.namprd03.prod.outlook.com (2603:10b6:805:6d::32) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from stormtrooper.vrmnet (72.93.72.163) by BL0PR1501CA0034.namprd15.prod.outlook.com (2603:10b6:207:17::47) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3391.14 via Frontend Transport; Mon, 21 Sep 2020 02:25:18 +0000 X-Mailer: git-send-email 2.28.0 X-Originating-IP: [72.93.72.163] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 580b04ef-de9a-4e79-4c25-08d85dd5955c X-MS-TrafficTypeDiagnostic: SN2PR03MB2237: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:8882; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: mk3RGY1PnFNHT0XdNVcgGMkZc0bPzsKHlKwF/OCztWuUKrlarmeXdvybuj1HteYb/mCX6EsQFSs+/0I7CxgufJVPHN+Yy7UAiGz4LvLYfyv6zAm3iNbc4ofSDHCCG/8mbz/Ktd9URhY0eiQ3sQtaZyll7qgENKN06Bnt6L8mH83ftG8NoM8+IXiyZni+uVrldru3LnoZRyw5KNBGPiaIhZtCoIcgBA12N5EQExSlHBBqNq9L0d3Dmg4PcntBrUSUJDEvWtfD8OG7w/QHZYoZ2ewjXL24rntEfQkjuAsE+dnMEASjNOv7BgcB5xTR0ZKMne+AN602eD576al9IJOhcJAT9JnnsqCAYDpTiZrfnzcJV4l5vjiGXtSdCFu1tMCIaKvQZ+FckOjUvHciAq3aGLZJlxKyXkQ+Za5NPTpz+PiShT2h3iVR+pAOIJPYXcb0eK13NsQRaDsGYhpkCgyytg== X-Forefront-Antispam-Report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:SN6PR03MB3871.namprd03.prod.outlook.com; PTR:; CAT:NONE; SFS:(4636009)(396003)(366004)(376002)(136003)(346002)(39860400002)(2616005)(956004)(4326008)(83380400001)(26005)(478600001)(16526019)(6666004)(8936002)(316002)(966005)(6486002)(66476007)(1076003)(6512007)(186003)(6916009)(86362001)(66946007)(5660300002)(36756003)(75432002)(2906002)(6506007)(8676002)(66556008)(52116002)(786003); DIR:OUT; SFP:1102; X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: bu.edu X-MS-Exchange-CrossTenant-Network-Message-Id: 580b04ef-de9a-4e79-4c25-08d85dd5955c X-MS-Exchange-CrossTenant-AuthSource: SN6PR03MB3871.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Sep 2020 02:25:19.0375 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: d57d32cc-c121-488f-b07b-dfe705680c71 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: cd3/xltmynvULm8D+EfKiOTrTHd6EKMuRBLTAubNPrI65Ctow4bvLBkJrJ49o/xF X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN2PR03MB2237 Received-SPF: pass client-ip=40.107.220.133; envelope-from=alxndr@bu.edu; helo=NAM11-CO1-obe.outbound.protection.outlook.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/20 22:40:23 X-ACL-Warn: Detected OS = Windows NT kernel [generic] [fuzzy] X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=0.001, MSGID_FROM_MTA_HEADER=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: darren.kenny@oracle.com, bsd@redhat.com, philmd@redhat.com, stefanha@redhat.com, Alexander Bulekov Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" v3: - Use flatviews to help select regions for fuzzing - Meson-related changes - Add some documentation - Improve minimalization script to trim write{bwlq} commands v2: - Remove QOS dependency. - Add a custom crossover function - Fix broken minimization scripts - Fixes to the IO region and DMA handling code This is a general virtual-device fuzzer, designed to fuzz devices over Port IO, MMIO, and DMA. To get started with this: 1. Build the fuzzers (see docs/devel/fuzzing.txt) Note: Build with --enable-sanitizers, or create a "dictionary file": echo kw1=\"FUZZ\" > dict and pass it as an argument to libFuzzer with -dict=./dict This magic value is a command separator that lets the fuzzer perform multiple IO actions with a single input. 2. Pick the qemu arguments you wish to fuzz: export QEMU_FUZZ_ARGS="-M q35 -device virtio-balloon" 3. Tell the fuzzer which QOM objects or MemoryRegion names to fuzz. I find the "info qom-tree", "info qtree" and "info mtree" commands useful for identifying these. Supports globbing. Here I will try to simultaneously fuzz(for no good reason) virtio-balloon and e1000e, which is included by default in the q35: export QEMU_FUZZ_OBJECTS='virtio* e1000*' You can also try to fuzz the whole machine: export QEMU_FUZZ_OBJECTS='*' 4. Run the fuzzer for 0 inputs. The fuzzer should output a list of MemoryRegions/PCI Devices it will try to fuzz. Confirm that these match your expectations. ./i386-softmmu/qemu-fuzz-i386 --fuzz-target=general-fuzz -runs=0 5. Run the fuzzer: ./i386-softmmu/qemu-fuzz-i386 --fuzz-target=general-fuzz Basically, at the core, this fuzzer is an interpreter that splits the input into a series of commands, such as mmio_write, pio_write, etc. We structure these commands to hit only MemoryRegions that are associated with the devices specified in QEMU_FUZZ_OBJECTS. Additionally, these patches add "hooks" to functions that are typically used by virtual-devices to read from RAM (DMA). These hooks attempt to populate these DMA regions with fuzzed data, just in time. Some of the issues I have found or reproduced with this fuzzer: https://bugs.launchpad.net/bugs/1525123 https://bugs.launchpad.net/bugs/1681439 https://bugs.launchpad.net/bugs/1777315 https://bugs.launchpad.net/bugs/1878034 https://bugs.launchpad.net/bugs/1878043 https://bugs.launchpad.net/bugs/1878054 https://bugs.launchpad.net/bugs/1878057 https://bugs.launchpad.net/bugs/1878067 https://bugs.launchpad.net/bugs/1878134 https://bugs.launchpad.net/bugs/1878136 https://bugs.launchpad.net/bugs/1878253 https://bugs.launchpad.net/bugs/1878255 https://bugs.launchpad.net/bugs/1878259 https://bugs.launchpad.net/bugs/1878263 https://bugs.launchpad.net/bugs/1878323 https://bugs.launchpad.net/bugs/1878641 https://bugs.launchpad.net/bugs/1878642 https://bugs.launchpad.net/bugs/1878645 https://bugs.launchpad.net/bugs/1878651 https://bugs.launchpad.net/bugs/1879223 https://bugs.launchpad.net/bugs/1879227 https://bugs.launchpad.net/bugs/1879531 https://bugs.launchpad.net/bugs/1880355 https://bugs.launchpad.net/bugs/1880539 https://bugs.launchpad.net/bugs/1884693 https://bugs.launchpad.net/bugs/1886362 https://bugs.launchpad.net/bugs/1887303 https://bugs.launchpad.net/bugs/1887309 https://bugs.launchpad.net/bugs/697510 Alexander Bulekov (16): memory: Add FlatView foreach function fuzz: Add general virtual-device fuzzer fuzz: Add PCI features to the general fuzzer fuzz: Add DMA support to the generic-fuzzer fuzz: Declare DMA Read callback function fuzz: Add fuzzer callbacks to DMA-read functions fuzz: Add support for custom crossover functions fuzz: add a DISABLE_PCI op to general-fuzzer fuzz: add a crossover function to generic-fuzzer scripts/oss-fuzz: Add wrapper program for generic fuzzer scripts/oss-fuzz: Add general-fuzzer build script scripts/oss-fuzz: Add general-fuzzer configs for oss-fuzz scripts/oss-fuzz: build the general-fuzzer configs scripts/oss-fuzz: Add script to reorder a general-fuzzer trace scripts/oss-fuzz: Add crash trace minimization script fuzz: Add instructions for using general-fuzz docs/devel/fuzzing.txt | 38 + exec.c | 2 + include/exec/memory.h | 21 + include/exec/memory_ldst_cached.h.inc | 3 + memory_ldst.c.inc | 4 + scripts/oss-fuzz/build.sh | 7 + scripts/oss-fuzz/build_general_fuzzers.py | 69 ++ scripts/oss-fuzz/general_fuzzer_configs.yml | 103 +++ scripts/oss-fuzz/minimize_qtest_trace.py | 157 ++++ .../oss-fuzz/reorder_fuzzer_qtest_trace.py | 94 ++ scripts/oss-fuzz/target_template.c | 40 + softmmu/memory.c | 23 + tests/qtest/fuzz/fuzz.c | 13 + tests/qtest/fuzz/fuzz.h | 27 + tests/qtest/fuzz/general_fuzz.c | 854 ++++++++++++++++++ tests/qtest/fuzz/meson.build | 1 + 16 files changed, 1456 insertions(+) create mode 100755 scripts/oss-fuzz/build_general_fuzzers.py create mode 100644 scripts/oss-fuzz/general_fuzzer_configs.yml create mode 100755 scripts/oss-fuzz/minimize_qtest_trace.py create mode 100755 scripts/oss-fuzz/reorder_fuzzer_qtest_trace.py create mode 100644 scripts/oss-fuzz/target_template.c create mode 100644 tests/qtest/fuzz/general_fuzz.c -- 2.28.0