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=-3.0 required=3.0 tests=BAYES_00,HK_RANDOM_FROM, MAILING_LIST_MULTI,SPF_HELO_NONE,URIBL_BLOCKED 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 2F434C433E0 for ; Mon, 8 Mar 2021 03:53:10 +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 A63E464E31 for ; Mon, 8 Mar 2021 03:53:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A63E464E31 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]:57760 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lJ6xA-0000cU-Ko for qemu-devel@archiver.kernel.org; Sun, 07 Mar 2021 22:53:08 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:58570) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lJ6wR-0008Tu-DI for qemu-devel@nongnu.org; Sun, 07 Mar 2021 22:52:24 -0500 Received: from relay68.bu.edu ([128.197.228.73]:37547) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lJ6wM-0006XM-UT for qemu-devel@nongnu.org; Sun, 07 Mar 2021 22:52:20 -0500 X-Envelope-From: alxndr@bu.edu X-BU-AUTH: mozz.bu.edu [128.197.127.33] Received: from BU-AUTH (localhost.localdomain [127.0.0.1]) (authenticated bits=0) by relay68.bu.edu (8.14.3/8.14.3) with ESMTP id 1283q0MW026652 (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256 verify=NO); Sun, 7 Mar 2021 22:52:03 -0500 Date: Sun, 7 Mar 2021 22:52:00 -0500 From: Alexander Bulekov To: Yan Zhiqiang Subject: Re: About libfuzzer in qemu Message-ID: <20210308035200.averk4yfddkqttyf@mozz.bu.edu> References: <20210304152326.6fqgrncqgsvlrxhc@mozz.bu.edu> <20210306051010.rfg3ox2yo3hwmn2c@mozz.bu.edu> <20210308034253.m6rjohwqcuynsaip@mozz.bu.edu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210308034253.m6rjohwqcuynsaip@mozz.bu.edu> Received-SPF: pass client-ip=128.197.228.73; envelope-from=alxndr@bu.edu; helo=relay68.bu.edu X-Spam_score_int: -15 X-Spam_score: -1.6 X-Spam_bar: - X-Spam_report: (-1.6 / 5.0 requ) BAYES_00=-1.9, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=0.999, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=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: qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 210307 2242, Alexander Bulekov wrote: > My basic workflow for that is: > QEMU_FUZZ_TIMEOUT=0 QTEST_LOG=1 FUZZ_SERIALIZE_QTEST=1 \ > ./qemu-fuzz-target \ > --fuzz-target=generic-fuzz-virtio-vga ./crash-... > /tmp/out ^ Oops that should be 2> or &> > ./scripts/oss-fuzz/reorder_fuzzer_qtest_trace.py /tmp/out > /tmp/repro > > # In /tmp/out find the line "Starting qemu with Arguments:" and copy the > # args ( without -qtest /dev/null) > less /tmp/out > > export QEMU_ARGS="-display none -machine accel=qtest, -m 512M -machine q35 -nodefaults -device virtio-vga" > > # Reproduce the crash on a non-fuzz binary > ./qemu-system-i386 $QEMU_ARGS -qtest stdio < /tmp/repro