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 22648C433DB for ; Sun, 10 Jan 2021 04:27:36 +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 9E8B9224DE for ; Sun, 10 Jan 2021 04:27:35 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9E8B9224DE 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]:45474 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kySKD-000122-Iz for qemu-devel@archiver.kernel.org; Sat, 09 Jan 2021 23:27:33 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:45280) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kySIk-0007ks-Et for qemu-devel@nongnu.org; Sat, 09 Jan 2021 23:26:02 -0500 Received: from indium.canonical.com ([91.189.90.7]:40382) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kySIh-0000g0-PC for qemu-devel@nongnu.org; Sat, 09 Jan 2021 23:26:02 -0500 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.86_2 #2 (Debian)) id 1kySIf-0000Dj-Lw for ; Sun, 10 Jan 2021 04:25:57 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id A45582E8147 for ; Sun, 10 Jan 2021 04:25:57 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Sun, 10 Jan 2021 04:17:33 -0000 From: Launchpad Bug Tracker <1761153@bugs.launchpad.net> To: qemu-devel@nongnu.org X-Launchpad-Notification-Type: bug X-Launchpad-Bug: product=qemu; status=Expired; importance=Undecided; assignee=None; X-Launchpad-Bug-Information-Type: Public X-Launchpad-Bug-Private: no X-Launchpad-Bug-Security-Vulnerability: no X-Launchpad-Bug-Commenters: janitor mgautierfr th-huth X-Launchpad-Bug-Reporter: Matthieu Gautier (mgautierfr) X-Launchpad-Bug-Modifier: Launchpad Janitor (janitor) References: <152284551397.28710.6742910020765706357.malonedeb@chaenomeles.canonical.com> Message-Id: <161025225373.18863.12111676248942722411.malone@loganberry.canonical.com> Subject: [Bug 1761153] Re: qemu-user incorrect mmap for large files on 64bits host and 32bits executable. 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="fd9c5a87183d01004404fa6027cd262eaa7f6fcf"; Instance="production" X-Launchpad-Hash: 45fc62b23d126ecc10ca99f2f9629ca95364a25d Received-SPF: none client-ip=91.189.90.7; envelope-from=bounces@canonical.com; helo=indium.canonical.com X-Spam_score_int: -65 X-Spam_score: -6.6 X-Spam_bar: ------ X-Spam_report: (-6.6 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.25, RCVD_IN_DNSWL_HI=-5, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, 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 1761153 <1761153@bugs.launchpad.net> Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" [Expired for QEMU because there has been no activity for 60 days.] ** Changed in: qemu Status: Incomplete =3D> Expired -- = You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1761153 Title: qemu-user incorrect mmap for large files on 64bits host and 32bits executable. Status in QEMU: Expired Bug description: qemu-user seems to incorrectly mmap a file if the offset is > 4GiB and guest binary is 32 bits elf. See attached test program `test_mmap.c`. ``` $ gcc -g -m32 -march=3Di386 test_mmap.c -o test_mmap $ file test_mmap test_mmap: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dyna= mically linked, interpreter /lib/ld-linux.so.2, for GNU/Linux 3.2.0, BuildI= D[sha1]=3De36db05f4dfd8a9cfde8a969214a242c1f5a4b49, with debug_info, not st= ripped $ uname -a Linux localhost.localdomain 4.15.10-300.fc27.x86_64 #1 SMP Thu Mar 15 17:= 13:04 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux $ qemu-i386 --version qemu-i386 version 2.10.1(qemu-2.10.1-2.fc27) Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers $ ./test_mmap $ qemu-i386 test_mmap Incorrect data 1 ``` Tested with qemu-i386 packaged in Fedora 27 and qemu-i386 compiled from git master (094b62cd9c) The issue was firstly detected on (more complex program) using qemu- arm (with 32bits binary) so it is probably a 32/64bits problem independently of the cpu family. 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