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=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 B151FC433E0 for ; Thu, 4 Jun 2020 08:50:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 84294206C3 for ; Thu, 4 Jun 2020 08:50:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728259AbgFDIuT (ORCPT ); Thu, 4 Jun 2020 04:50:19 -0400 Received: from mail-io1-f71.google.com ([209.85.166.71]:44336 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728228AbgFDIuS (ORCPT ); Thu, 4 Jun 2020 04:50:18 -0400 Received: by mail-io1-f71.google.com with SMTP id y14so3182149ion.11 for ; Thu, 04 Jun 2020 01:50:16 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=A2HBUdAMpWbKBpNbzC++zcPeQhDXmhmI0aCAyr/UXfk=; b=Ck+8vYRPbFPbJUWf9k/CWlUDrqwgrVInb+eE8Np1e30GWRTP5cId0mmxqdD/GoY4EV KPPEK7e/AVy2JGrH9fn7n57ebJ4HHc3RqHv4e+AmAVOexB5//nlsUFGs2qGn9WGsHfLE r9CXnqviP//oTHQqJ2WB1qoqZnMB5Sy+YoGkeuZ+rmJ+OCsWGTsDnSk+Sb5Yn33P3Frz X8nBWJbTTQsCGmqsQBeM49xhU9Pa5pYGL4wo/nt+TFiawWC/5GLWHSNNfOfYmOYtjMMo U6MpQ80WbQITESRrznvxUAv6TQaMsB5QQPeQ/Ut5KI5BhbUVK/9QwtvX8HWUtkk3DfBA 0z8Q== X-Gm-Message-State: AOAM530sZ5Hdgps7Zv0LC/4xEb27zyigyC/5sGep7rR71Q2iCL8PdPGm 2OdbTHNYjnp4Ntb0Izmf6YFwh8iYvLBXU6I5E4QaPeCiWmHz X-Google-Smtp-Source: ABdhPJwhHXrd9hyDDeUrOTmPuneHcL4rL4S3D/rQ5xbu/pyI62sptAnY0k9viO1BJbH1sfUlGLIwZjG+dQp3Xr5rsc6hyuJWuFxn MIME-Version: 1.0 X-Received: by 2002:a92:b00e:: with SMTP id x14mr2918527ilh.219.1591260616368; Thu, 04 Jun 2020 01:50:16 -0700 (PDT) Date: Thu, 04 Jun 2020 01:50:16 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000c8a76e05a73e3be3@google.com> Subject: WARNING in kvm_inject_emulated_page_fault From: syzbot To: bp@alien8.de, hpa@zytor.com, jmattson@google.com, joro@8bytes.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, mingo@redhat.com, pbonzini@redhat.com, sean.j.christopherson@intel.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, vkuznets@redhat.com, wanpengli@tencent.com, x86@kernel.org Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: cb8e59cc Merge git://git.kernel.org/pub/scm/linux/kernel/g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14dedfe2100000 kernel config: https://syzkaller.appspot.com/x/.config?x=a16ddbc78955e3a9 dashboard link: https://syzkaller.appspot.com/bug?extid=2a7156e11dc199bdbd8a compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=134ca2de100000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=178272f2100000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+2a7156e11dc199bdbd8a@syzkaller.appspotmail.com L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details. ------------[ cut here ]------------ WARNING: CPU: 0 PID: 6819 at arch/x86/kvm/x86.c:618 kvm_inject_emulated_page_fault+0x210/0x290 arch/x86/kvm/x86.c:618 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 6819 Comm: syz-executor268 Not tainted 5.7.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x188/0x20d lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:221 __warn.cold+0x2f/0x35 kernel/panic.c:582 report_bug+0x27b/0x2f0 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:105 [inline] fixup_bug arch/x86/kernel/traps.c:100 [inline] do_error_trap+0x12b/0x220 arch/x86/kernel/traps.c:197 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:216 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:kvm_inject_emulated_page_fault+0x210/0x290 arch/x86/kvm/x86.c:618 Code: 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 79 48 8b 53 08 4c 89 f6 48 89 ef e8 fa 04 0c 00 e9 10 ff ff ff e8 10 ac 68 00 <0f> 0b e9 3a fe ff ff 4c 89 e7 e8 21 74 a7 00 e9 5d fe ff ff 48 89 RSP: 0018:ffffc90000f87968 EFLAGS: 00010293 RAX: ffff888095202540 RBX: ffffc90000f879e0 RCX: ffffffff810ae417 RDX: 0000000000000000 RSI: ffffffff810ae5e0 RDI: 0000000000000001 RBP: ffff888088ce0040 R08: ffff888095202540 R09: fffff520001f0f58 R10: ffffc90000f87abf R11: fffff520001f0f57 R12: 0000000000000000 R13: 0000000000000001 R14: ffffc90000f87ab8 R15: ffff888088ce0380 nested_vmx_get_vmptr+0x1f9/0x2a0 arch/x86/kvm/vmx/nested.c:4638 handle_vmon arch/x86/kvm/vmx/nested.c:4767 [inline] handle_vmon+0x168/0x3a0 arch/x86/kvm/vmx/nested.c:4728 vmx_handle_exit+0x29c/0x1260 arch/x86/kvm/vmx/vmx.c:6067 vcpu_enter_guest arch/x86/kvm/x86.c:8604 [inline] vcpu_run arch/x86/kvm/x86.c:8669 [inline] kvm_arch_vcpu_ioctl_run+0x2723/0x68a0 arch/x86/kvm/x86.c:8890 kvm_vcpu_ioctl+0x46a/0xe20 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3163 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0x11a/0x180 fs/ioctl.c:771 __do_sys_ioctl fs/ioctl.c:780 [inline] __se_sys_ioctl fs/ioctl.c:778 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:778 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x443569 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 1b 0c fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffece6351a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ffece6351b0 RCX: 0000000000443569 RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000006 RBP: 0000000000000000 R08: 0000000020003800 R09: 0000000000400eb0 R10: 00007ffece633610 R11: 0000000000000246 R12: 0000000000404610 R13: 00000000004046a0 R14: 0000000000000000 R15: 0000000000000000 Kernel Offset: disabled Rebooting in 86400 seconds.. --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches