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=-0.5 required=3.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, 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 DDA72C433C1 for ; Fri, 26 Mar 2021 06:42:03 +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 1D4666193C for ; Fri, 26 Mar 2021 06:42:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1D4666193C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:34140 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lPgAT-0000lB-4S for qemu-devel@archiver.kernel.org; Fri, 26 Mar 2021 02:42:01 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42400) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lPg8t-0000AV-Na for qemu-devel@nongnu.org; Fri, 26 Mar 2021 02:40:23 -0400 Received: from mail-oi1-x231.google.com ([2607:f8b0:4864:20::231]:45937) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lPg8r-0002Wl-O7 for qemu-devel@nongnu.org; Fri, 26 Mar 2021 02:40:23 -0400 Received: by mail-oi1-x231.google.com with SMTP id d12so4706000oiw.12 for ; Thu, 25 Mar 2021 23:40:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=2tPvoiOyFYmG1E446ar9VKpqxfwhwekKrth2b1MDMPI=; b=HUlj9EEI3wMSSqdxGqAbMfwmDHCBDW3B2IDV6JbjW4SHNC+gwzlNaOync4A98rb2Ow jbRAhZ6nlT9SONDFdEjgd1BLLWnjfbglPbzLtrVbuT/sghUPSU7tlqNNdIKk6fbulNk6 YMUxQx7lc97pRvXaIMT1hE1epMUSSfgje9Sf6tIfpkdHXsUmwEMM7/QFusaV2tr4xB9Q YaEa+5KkRE64miZiWvFyIggkdsPa6kN+txv7XwkVT0jAPQlLPoYeyGOB1W2DIRnyow9D g2TFwbAu0mejIs9G27Lj7yOfvk60g8V7jp6nBuOZ1Kak5/WKIaFDALaJxyfu35Jelzqj R4wA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=2tPvoiOyFYmG1E446ar9VKpqxfwhwekKrth2b1MDMPI=; b=msIan79z4ELCCFKBdFr9spWcqT1ruQd6qZbSWAQr6xnpPDaoLPBFkFDLzvioyjmtnc FlB7P2uJDt76lSF1J1M5jh72j8bxcmxPgK9ZNIJ50YJ9H5QQBnmxT2y03KGYuqc1P3s2 Ky1fuYOZE9EorOEl+4O+QZH7DSw+SXcS8J7e1XuvI87uvhASKB5Nea+ErltRcKuhU/pT pcKAfUYOlIuvNCoE4hGrqa72F/3hPVrRP4L1GCDCVk5hIr/I1pwe8PxtryPVhfPgXiOP FclSxc7WGSGUCNSVxWbMetcCmqNIwz/4bKzGN/nYicqf49Ar97msoLzqhbkDeQ0VRkow 2+Jw== X-Gm-Message-State: AOAM532xqrEC7xMal82PidPBf+WdGotA9Ocf8WVFytVDeT8KXo6e3+31 DfVl5PY+mMolldkx/miy/EUD5KyJVmlzHyrCjrA= X-Google-Smtp-Source: ABdhPJxdxKVA7edX2PYYDViQhKyaZXIMIRG8twxoLkExV5tS1lRz/ywKKjiQhzsIUwRvdYTgx2ghEWoIueLBznwopN0= X-Received: by 2002:aca:5d82:: with SMTP id r124mr8674738oib.59.1616740820196; Thu, 25 Mar 2021 23:40:20 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Howard Spoelstra Date: Fri, 26 Mar 2021 07:40:09 +0100 Message-ID: Subject: Re: Bug with Windows tap network when running qemu-system-ppc with Mac OS 9 guest To: Bin Meng Content-Type: text/plain; charset="UTF-8" Received-SPF: pass client-ip=2607:f8b0:4864:20::231; envelope-from=hsp.cat7@gmail.com; helo=mail-oi1-x231.google.com X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham 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: Peter Maydell , Jason Wang , qemu-devel qemu-devel Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Fri, Mar 26, 2021 at 2:50 AM Bin Meng wrote: > > Hi Howard, > > On Fri, Mar 26, 2021 at 1:35 AM Peter Maydell wrote: > > > > (adding the relevant people to the cc list) > > > > On Thu, 25 Mar 2021 at 17:26, Howard Spoelstra wrote: > > > > > > Hi, > > > > > > When running qemu-system-ppc with Mac OS guest, the guest crashes when > > > using a tap network connection. Openvpn 2.4.9-I601-win10 is installed > > > with TAP-Windows 9.24.2. A tap connection called TapQemu is bridged > > > with the default ethernet connection. It gets activated when I start > > > qemu. > > > > > > To reproduce, compile qemu-system-ppc from current source and run: > > > > > > qemu-system-ppc.exe ^ > > > -L pc-bios ^ > > > -M mac99 ^ > > > -m 128 ^ > > > -sdl -serial stdio ^ > > > -boot c ^ > > > -drive file=C:\Mac-disks\9.2.img,format=raw,media=disk ^ > > > -device sungem,netdev=network01 -netdev tap,ifname=TapQemu,id=network01 > > > > > > I bisected to the commit below. Thanks for looking into this. > > Thanks for reporting. > > Can you please provide some further information: > > 1. Does "-net user" work on Windows? > 2. If running QEMU under Linux, does "-net tap" or "-net user" work? > > Regards, > Bin Hello Bin, Thanks for getting back to me. I forgot to mention that reverting the above patch restores functionality. And that other applications using the same tap device work correctly. In answer to your questions: 1. Yes, slirp works on Windows 10 with this setup. 2. Yes, in Linux both tap and slirp work. My Windows build is done with a fully up to date msys2 installation. I tried to debug in Windows: (gdb) run Starting program: c:\qemu-master-msys2\qemu-system-ppc.exe -L pc-bios -M mac99 -m 128 -sdl -serial stdio -boot c -drive "file=C:\Mac-disks\9.2-usb-pci-ddk.img,format=raw,media=disk" -device "sungem,netdev=network01" -netdev "tap,ifname=TapQemu,id=network01" -S [New Thread 13304.0x1f00] [New Thread 13304.0x2f84] [New Thread 13304.0x3524] [New Thread 13304.0x2b8c] [New Thread 13304.0x368c] [New Thread 13304.0x3668] [New Thread 13304.0xf4c] [New Thread 13304.0x49c] [New Thread 13304.0x1d4c] [New Thread 13304.0x7fc] [Thread 13304.0x7fc exited with code 0] [New Thread 13304.0x357c] [New Thread 13304.0x7c0] [New Thread 13304.0x3564] [New Thread 13304.0x26f4] [New Thread 13304.0x2f68] Program received signal SIGSEGV, Segmentation fault. 0x00007ffb9edea991 in ?? () from c:\qemu-master-msys2\libglib-2.0-0.dll (gdb) bt #0 0x00007ffb9edea991 in ?? () from c:\qemu-master-msys2\libglib-2.0-0.dll #1 0x000800000480bf50 in ?? () Backtrace stopped: previous frame inner to this frame (corrupt stack?) (gdb) Even before I could attach to the process. Best, Howard