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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 81C79C433B4 for ; Sun, 9 May 2021 21:51:30 +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 9DF9B613C2 for ; Sun, 9 May 2021 21:51:29 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9DF9B613C2 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bugs.launchpad.net Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:47204 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lfrKi-00043u-CV for qemu-devel@archiver.kernel.org; Sun, 09 May 2021 17:51:28 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:46140) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lfrJs-0003C0-Kq for qemu-devel@nongnu.org; Sun, 09 May 2021 17:50:36 -0400 Received: from indium.canonical.com ([91.189.90.7]:50456) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lfrJq-0007qo-TG for qemu-devel@nongnu.org; Sun, 09 May 2021 17:50:36 -0400 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.93 #5 (Debian)) id 1lfrJo-0007BP-L0 for ; Sun, 09 May 2021 21:50:32 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id 9D3742E804B for ; Sun, 9 May 2021 21:50:32 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Sun, 09 May 2021 21:42:55 -0000 From: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= <1920602@bugs.launchpad.net> To: qemu-devel@nongnu.org X-Launchpad-Notification-Type: bug X-Launchpad-Bug: product=qemu; status=Confirmed; importance=Undecided; assignee=None; X-Launchpad-Bug-Tags: i386 tcg X-Launchpad-Bug-Information-Type: Public X-Launchpad-Bug-Private: no X-Launchpad-Bug-Security-Vulnerability: no X-Launchpad-Bug-Commenters: aaro-koskinen philmd X-Launchpad-Bug-Reporter: Aaro Koskinen (aaro-koskinen) X-Launchpad-Bug-Modifier: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9_=28philmd?= =?utf-8?q?=29?= References: <161624570188.19824.1091833072893020317.malonedeb@wampee.canonical.com> Message-Id: <162059657583.16724.10333572444964791151.malone@soybean.canonical.com> Subject: [Bug 1920602] Re: QEMU crash after a QuickBASIC program integer overflow X-Launchpad-Message-Rationale: Subscriber (QEMU) @qemu-devel-ml X-Launchpad-Message-For: qemu-devel-ml Precedence: bulk X-Generated-By: Launchpad (canonical.com); Revision="dccd804998035922efb3da0a725ecc923e2255f3"; Instance="production" X-Launchpad-Hash: 9e676eb24abea4bd9d76c302202a17931fba1cb1 Received-SPF: none client-ip=91.189.90.7; envelope-from=bounces@canonical.com; helo=indium.canonical.com X-Spam_score_int: -66 X-Spam_score: -6.7 X-Spam_bar: ------ X-Spam_report: (-6.7 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_HI=-5, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Bug 1920602 <1920602@bugs.launchpad.net> Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Since commit 975af797f1e helper_fist_ST0() sets float_flag_invalid. -- = You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1920602 Title: QEMU crash after a QuickBASIC program integer overflow Status in QEMU: Confirmed Bug description: A trivial program compiled with QuickBASIC 4.5 with integer overflow will crash QEMU when ran under MS-DOS 5.0 or FreeDOS 1.2: C:\KILLER>type killer.bas A% =3D VAL("99999"):PRINT A% C:\KILLER>killer.exe ** =C2=A0=C2=A0ERROR:../qemu-5.2.0/accel/tcg/tcg-cpus.c:541:tcg_handle_inter= rupt: assertion failed: (qemu_mutex_iothread_locked()) Aborted QEMU version v5.2, compiler for ARM, and started with command line: qemu-system-i386 -curses -cpu 486 -m 1 -drive dos.img The same test under Ubuntu QEMU and KVM/x86_64 (QEMU emulator version 4.2.1 (Debian 1:4.2-3ubuntu6.14)) will just silently hang the QEMU. On DOSBOX, the machine does not die and program outputs the value -31073. The EXE to reproduce the issue is attached. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1920602/+subscriptions