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=-8.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS autolearn=ham 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 71564C433B4 for ; Mon, 10 May 2021 08:52:33 +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 C2DA860FD9 for ; Mon, 10 May 2021 08:52:32 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C2DA860FD9 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]:40116 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lg1eR-0006ao-IL for qemu-devel@archiver.kernel.org; Mon, 10 May 2021 04:52:31 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:54474) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lg1dC-0003zq-NB for qemu-devel@nongnu.org; Mon, 10 May 2021 04:51:14 -0400 Received: from indium.canonical.com ([91.189.90.7]:33874) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lg1dA-0008Ob-DI for qemu-devel@nongnu.org; Mon, 10 May 2021 04:51:14 -0400 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.93 #5 (Debian)) id 1lg1d4-0002f2-Lc for ; Mon, 10 May 2021 08:51:07 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id 245162E8206 for ; Mon, 10 May 2021 08:51:01 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Mon, 10 May 2021 08:41:20 -0000 From: Thomas Huth <1874888@bugs.launchpad.net> To: qemu-devel@nongnu.org X-Launchpad-Notification-Type: bug X-Launchpad-Bug: product=qemu; status=Incomplete; 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: skotik th-huth X-Launchpad-Bug-Reporter: Konstantin (skotik) X-Launchpad-Bug-Modifier: Thomas Huth (th-huth) References: <158775385817.8537.12364422091879172270.malonedeb@gac.canonical.com> Message-Id: <162063608031.7066.15020787991607606635.malone@gac.canonical.com> Subject: [Bug 1874888] Re: certain programs make QEMU crash with "tcg fatal error" 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: 6e89dcbfdd57117482f5cc0f27b467d9489fd81e 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 1874888 <1874888@bugs.launchpad.net> Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" The QEMU project is currently moving its bug tracking to another system. For this we need to know which bugs are still valid and which could be closed already. Thus we are setting the bug state to "Incomplete" now. If the bug has already been fixed in the latest upstream version of QEMU, then please close this ticket as "Fix released". If it is not fixed yet and you think that this bug report here is still valid, then you have two options: 1) If you already have an account on gitlab.com, please open a new ticket for this problem in our new tracker here: https://gitlab.com/qemu-project/qemu/-/issues and then close this ticket here on Launchpad (or let it expire auto- matically after 60 days). Please mention the URL of this bug ticket on Launchpad in the new ticket on GitLab. 2) If you don't have an account on gitlab.com and don't intend to get one, but still would like to keep this ticket opened, then please switch the state back to "New" or "Confirmed" within the next 60 days (other- wise it will get closed as "Expired"). We will then eventually migrate the ticket automatically to the new system (but you won't be the reporter of the bug in the new system and thus you won't get notified on changes anymore). Thank you and sorry for the inconvenience. ** Tags added: i386 tcg ** Changed in: qemu Status: New =3D> Incomplete -- = You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1874888 Title: certain programs make QEMU crash with "tcg fatal error" Status in QEMU: Incomplete Bug description: The following code snippet crashes qemu with .../tcg/tcg.c:3279: tcg fatal error qemu-x86_64: /usr/local/google/home/kostik/qemu-5.0.0-rc4/accel/tcg/cpu-e= xec.c:701: int cpu_exec(CPUState *): Assertion `!have_mmap_lock()' failed. =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D int main() { /* 00000000 <.data>: 0: 2e 45 71 ff cs rex.RB jno 0x3 4: e9 00 00 f0 00 jmp 0xf00009 9: c4 42 7d 31 3e vpmovzxbd ymm15,QWORD PTR [r14] e: c4 a3 7d 08 64 82 44 vroundps ymm4,YMMWORD PTR [rdx+r8*4+0x44]= ,0x0 15: 00 = 16: 0f 1e 0a nop DWORD PTR [rdx] 19: 43 0f ec 20 rex.XB paddsb mm4,QWORD PTR [r8] 1d: 66 47 0f 3a 0c 3d 00 rex.RXB blendps xmm15,XMMWORD PTR [rip+0x= 8000],0x0 # 0x8028 24: 80 00 00 00 = 28: c4 e3 f9 df 5f 86 0d vaeskeygenassist xmm3,XMMWORD PTR [rdi-0x= 7a],0xd 2f: c4 e2 55 92 74 fc 0a vgatherdps ymm6,DWORD PTR [rsp+ymm7*8+0xa= ],ymm5 36: c4 e2 f9 17 9a 01 00 vptest xmm3,XMMWORD PTR [rdx+0x1] 3d: 00 00 = */ char buf[] =3D { 0x2E, 0x45, 0x71, 0xFF, 0xE9, 0x00, 0x00, 0xF0, 0x00, 0xC4, 0x42, 0x7= D, 0x31, 0x3E, 0xC4, 0xA3, 0x7D, 0x08, 0x64, 0x82, 0x44, 0x00, 0x0F, 0x1E, = 0x0A, 0x43, 0x0F, 0xEC, 0x20, 0x66, 0x47, 0x0F, 0x3A, 0x0C, 0x3D, 0x00, 0x8= 0, 0x00, 0x00, 0x00, 0xC4, 0xE3, 0xF9, 0xDF, 0x5F, 0x86, 0x0D, 0xC4, 0xE2, = 0x55, 0x92, 0x74, 0xFC, 0x0A, 0xC4, 0xE2, 0xF9, 0x17, 0x9A, 0x01, 0x00, 0x0= 0, 0x00 }; void (*f)(void) =3D (void (*) (void))buf; f(); return 0; } =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D Steps to reproduce: 1) clang -static repro.c -o repro 2) qemu-x86_64-static repro Tested with 4.2.0 and 5.0.0-rc4. Both -user and -system variants are affected. A few more snippets that cause the same sort of behavior: 1) 0x64, 0x46, 0x7D, 0xFF, 0xDF, 0x27, 0x46, 0x0F, 0xD4, 0x83, 0x5E, 0x00= , 0x00, 0x00, 0x3E, 0x0F, 0x6A, 0xEF, 0x0F, 0x05, 0xC4, 0x42, 0xFD, 0x1E, 0= xCF, 0x46, 0x18, 0xE3, 0x47, 0xCD, 0x4E, 0x6E, 0x0F, 0x0F, 0x16, 0x8A 2) 0x67, 0x45, 0xDB, 0xD0, 0xAA, 0xC4, 0xE2, 0xB1, 0x01, 0x57, 0x00, 0xF3, 0x6F, 0xF3, 0x42, 0x0F, 0x1E, 0xFD, 0x64, 0x2E, 0xF2, 0x45, 0xD9, 0xC4, 0x3E, 0xF3, 0x0F, 0xAE, 0xF4, 0x3E, 0x47, 0x0F, 0x1C, 0x22, 0x42, 0x73, 0xFF, 0xD9, 0xFD To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1874888/+subscriptions