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 343FCC07E98 for ; Mon, 5 Jul 2021 04:34:14 +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 C8953613CB for ; Mon, 5 Jul 2021 04:34:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C8953613CB 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]:56746 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m0GJB-0007ZL-0P for qemu-devel@archiver.kernel.org; Mon, 05 Jul 2021 00:34:13 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:39064) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m0GBj-0004UE-3Q for qemu-devel@nongnu.org; Mon, 05 Jul 2021 00:26:31 -0400 Received: from indium.canonical.com ([91.189.90.7]:49408) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1m0GBh-0002wd-3K for qemu-devel@nongnu.org; Mon, 05 Jul 2021 00:26:30 -0400 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.93 #5 (Debian)) id 1m0GBS-0004SE-Fy for ; Mon, 05 Jul 2021 04:26:14 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id 470D92E81DD for ; Mon, 5 Jul 2021 04:26:03 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Mon, 05 Jul 2021 04:17:32 -0000 From: Launchpad Bug Tracker <1818483@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-Tags: linux-user X-Launchpad-Bug-Information-Type: Public X-Launchpad-Bug-Private: no X-Launchpad-Bug-Security-Vulnerability: no X-Launchpad-Bug-Commenters: janitor lpeng pmaydell th-huth wzssyqa X-Launchpad-Bug-Reporter: Luyou Peng (lpeng) X-Launchpad-Bug-Modifier: Launchpad Janitor (janitor) References: <155168800961.29550.2360664198558693792.malonedeb@chaenomeles.canonical.com> Message-Id: <162545865297.12677.16700330462575304585.malone@loganberry.canonical.com> Subject: [Bug 1818483] Re: qemu user mode does not support binfmt_misc config with flags include "P" 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="c7d3f30bfe7d7b488c7f9d3c8d7880184b1d065e"; Instance="production" X-Launchpad-Hash: 29a4f561bc62cd0ca6615c39e9be3e513f686fb5 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=0.25, 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 1818483 <1818483@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/1818483 Title: qemu user mode does not support binfmt_misc config with flags include "P" Status in QEMU: Expired Bug description: Hi Sir: During our test in chroot environment with qemu-user-static, we got some = test cases failed because of program output warning with unexpected full pa= th name. For example in test module "Devscripts" the test item for broken tarball expected the warning info: but the output was: the cause is the config file of binfmt_misc was set not to send argv0, fo= r example: type command "tar" after chroot: =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D lpeng@lpeng-VirtualBox:~/projects_lpeng/qemu/mips_2/sid$ sudo chroot . [sudo] password for lpeng: = root@lpeng-VirtualBox:/# tar /bin/tar: You must specify one of the '-Acdtrux', '--delete' or '--test-l= abel' options Try '/bin/tar --help' or '/bin/tar --usage' for more information. root@lpeng-VirtualBox:/# = =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D by adding output log in main()@qemu/Linux-user/main.c we found the original input command was changed, and qemu do not know tha= t, we got the input args: argv_0----/usr/bin/qemu-mips64el-static--- argv_1----/bin/tar--- argv_2----NULL--- Next step we modified the flags=3DP in the corresponding config under fol= der /proc/sys/fs/binfmt_misc, then binfmt_misc sent argv[0] to qemu. But chroot could not start bash because in current qemu dose not consider= about this unexpected one more"argv[0]" = After modified qemu code temporary to handle the new argv list we got the= input args, and from argv[2] is the original input command argv_0----/usr/bin/qemu-mips64el-static--- argv_1----/bin/tar--- argv_2----tar--- We need the original input from command line, so is it possible that let = binfmt_misc to pass one more additional args or env to qemu as a token of t= he binfmt_misc flag, then qemu can judge how to parse the input args by it? looking forward your suggestions. Thanks luyou To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1818483/+subscriptions