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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9F709C43334 for ; Wed, 13 Jul 2022 21:11:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237312AbiGMVLl (ORCPT ); Wed, 13 Jul 2022 17:11:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33742 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231409AbiGMVLk (ORCPT ); Wed, 13 Jul 2022 17:11:40 -0400 Received: from mail-pg1-x532.google.com (mail-pg1-x532.google.com [IPv6:2607:f8b0:4864:20::532]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 91E2B33369 for ; Wed, 13 Jul 2022 14:11:39 -0700 (PDT) Received: by mail-pg1-x532.google.com with SMTP id s206so11548281pgs.3 for ; Wed, 13 Jul 2022 14:11:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=Gm6WM9hDERFO+8ASfgwNqGJkZQjABrHSoY+dp8PEOqA=; b=A0tW7cBYVTBbk4/OGxo7p7TX9vbmu3nihl3xRQxabibyWP8JCSwapJDOv0U5ez/B7q 9ZpqLuxj222EyJrfebfx83YvFysxF3AVeuBHvPoeneEz/dTgdIO78Ap47jLgPAJ1C2u0 C68Ct0nJvS/dKmykmI5xJMtsvxiG6MkYcMz5U+Hrpm6KCK/7kNFuBKnvG9/u0M3U9QDb a9bHLWC1DOgGxxnPa7Gl5ygccxj6S3DKTjsKmGQqRdg/F6+wDEFTMfJVzwx+WgvUzLj7 PsD+5WvkpayUOB/XoYR/kHDArYhHqmfv3m71jkg88AIbOYpkZJHQy+0W+8y/Gjbr6Pb5 ttAw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=Gm6WM9hDERFO+8ASfgwNqGJkZQjABrHSoY+dp8PEOqA=; b=iTaXfHGqJBcQf5zmK2pK5udSY2sCKWh7+vtqjW6OTvwXZ/fgvm6f3dYPUuM9C+OhNL 6unA7V9Bnr8D3FPy7EFlcW2WcwIFNf7JU1q9TSeUIaZwpDejR6uf0pnDiyNBOIweVapo kkfE0Qy/2qy0VJE/8njW1AFzm/YDjptELzBgbZLkpfXUY5WgTmta4hIjA7u8wz3AJC2d nG4GbS7+dObf0B/ByY8q5YVzSEZC8ovpFe6C5j4HoOj13YS+FyQUkykJpdf86J3w29fe AvEoD4ABKneKzEe02uS9kAItx0L9+KwLW7yHQYbYgMobX4LIUfgF9d1weZedbfGpXY0N /Jgg== X-Gm-Message-State: AJIora94b1+bexsiMIrg3LwCWOEjXeTpGAbqWwe6rLVB9GxX1m7WoHez wvfDSA9mAAw5U80krr1FDPDpoQ== X-Google-Smtp-Source: AGRyM1vnNMUj1Yojr03HQ23q3BKKyDBLNwlrE0ptf5QVzHWvINAz08pbCRuFm0bnJQpWgleIKveIiQ== X-Received: by 2002:a63:854a:0:b0:419:64c6:5f9e with SMTP id u71-20020a63854a000000b0041964c65f9emr4628625pgd.139.1657746698979; Wed, 13 Jul 2022 14:11:38 -0700 (PDT) Received: from google.com (123.65.230.35.bc.googleusercontent.com. [35.230.65.123]) by smtp.gmail.com with ESMTPSA id z9-20020aa79e49000000b005253bf1e4d0sm9303668pfq.24.2022.07.13.14.11.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 13 Jul 2022 14:11:38 -0700 (PDT) Date: Wed, 13 Jul 2022 21:11:34 +0000 From: Sean Christopherson To: Jinpu Wang Cc: Greg Kroah-Hartman , stable , Sasha Levin , kvm@vger.kernel.org Subject: Re: 5.10.131-rc1 crash with int3: RIP 0010:xaddw_ax_dx+0x9/0x10 [kvm] Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org On Wed, Jul 13, 2022, Jinpu Wang wrote: > On Wed, Jul 13, 2022 at 3:01 PM Greg Kroah-Hartman > wrote: > > > > On Wed, Jul 13, 2022 at 02:26:44PM +0200, Jinpu Wang wrote: > > > On Wed, Jul 13, 2022 at 12:49 PM Jinpu Wang wrote: > > > > #5.10.131-1+feature+linux+5.10.y+20220712.1850+30f4172c~deb11 ... > > > > [ 1895.979325] Call Trace: > > > > [ 1895.979325] ? fastop+0x59/0xa0 [kvm] > > > > [ 1895.979326] ? x86_emulate_insn+0x73a/0xe00 [kvm] > > > > [ 1895.979326] ? x86_emulate_instruction+0x2d0/0x750 [kvm] > > > > [ 1895.979326] ? vmx_vcpu_load+0x21/0x70 [kvm_intel] > > > > [ 1895.979327] ? complete_emulated_mmio+0x236/0x310 [kvm] > > > > [ 1895.979327] ? kvm_arch_vcpu_ioctl_run+0x1744/0x1920 [kvm] > > > > [ 1895.979327] ? kvm_vcpu_ioctl+0x211/0x5a0 [kvm] > > > > [ 1895.979328] ? __fget_files+0x79/0xb0 > > > > [ 1895.979328] ? __fget_files+0x79/0xb0 > > > > [ 1895.979328] ? __x64_sys_ioctl+0x8b/0xc0 > > > > [ 1895.979329] ? do_syscall_64+0x33/0x40 > > > > [ 1895.979329] ? entry_SYSCALL_64_after_hwframe+0x61/0xc6 ... > > > > Is this bug known, any hint how to fix it? > > > I did more tests on different Servers, so far all the machine > > > checked(Skylake/Icelake/Haswell/Broadwell/EPYC) crash immediately > > > except AMD Opteron. > > > kvm-unit-tests succeeded without regression. > > > > Same issue on Linus's tree right now as well? Or does that pass just > > fine? > > Hi Greg, > > I haven't try linus tree, but just tried 5.15.55-rc1 on Intel Skylake, > it crashed the same. > > I will give Linus tree a try. Looks like fastop() got broken by the retbleed mitigations, i.e. this isn't unique to stable trees. https://lore.kernel.org/all/20220713171241.184026-1-cascardo@canonical.com