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=-8.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 E016BC4741F for ; Thu, 1 Oct 2020 20:18:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A23962074B for ; Thu, 1 Oct 2020 20:18:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733059AbgJAUSa (ORCPT ); Thu, 1 Oct 2020 16:18:30 -0400 Received: from mail-il1-f207.google.com ([209.85.166.207]:47671 "EHLO mail-il1-f207.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726671AbgJAUS1 (ORCPT ); Thu, 1 Oct 2020 16:18:27 -0400 Received: by mail-il1-f207.google.com with SMTP id s18so2243864ili.14 for ; Thu, 01 Oct 2020 13:18:24 -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=OXIZsSnUOlc4gw4iyjdMyg6484OMYqcylRmSwR+4wSw=; b=Y8rJSGfuTSmkmbS+VJTHBuQuOLbCPNb8uW0ncjJCsTZKkzxQA2pn37q/3y0Io7OwM2 k7xRsDEzNPiol5ztOju7dGM6jCvBNujdmZ08lnDe6GJM2BjD7Ivplw9ixJ+NcRG9awqA qfYgrnlnOPNe4yQN1Qex6UhBxvQgjS4Q0vHQc8TNccTS63QbWZW2D6oXedIJj+HbU1Lg TN+/MwcZGGK/fcatC8yzJ9tWaBYn53bnLKVJ3MHUfTM6EmbLG6HWEuFt8gRO3feOs4WT 0yqHjcN1KA2HzjdriL+CHAJsPUXGFV3almZEjvXvTK8wtGFWe52LbQV+0x0PBnM0scrp Eyhg== X-Gm-Message-State: AOAM533ApRlfYWLQnuGm38BoK0dDV44xuhZNODOwf3uFhg+lprYbJkF5 xR10EKe5B9+6Yibpq+6tmxyzkVRw4AD/5vUX7JANbRw6vyaQ X-Google-Smtp-Source: ABdhPJwT/dpYIRCW3/PoHCOUt9O1bS/nQ9SMyEkaCehe2TanjqOnWqQbBKb5eZrQlzsed5b2jOZsjZDiHJWLKEX47Ksdg2cuvdi/ MIME-Version: 1.0 X-Received: by 2002:a5e:820d:: with SMTP id l13mr6866782iom.3.1601583504502; Thu, 01 Oct 2020 13:18:24 -0700 (PDT) Date: Thu, 01 Oct 2020 13:18:24 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000dd392b05b0a1b7ac@google.com> Subject: WARNING in handle_exception_nmi 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" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: fb0155a0 Merge tag 'nfs-for-5.9-3' of git://git.linux-nfs... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11a7329d900000 kernel config: https://syzkaller.appspot.com/x/.config?x=adebb40048274f92 dashboard link: https://syzkaller.appspot.com/bug?extid=4e78ae6b12b00b9d1042 compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=173937ad900000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1041373d900000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+4e78ae6b12b00b9d1042@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: 1 PID: 6854 at arch/x86/kvm/vmx/vmx.c:4809 handle_exception_nmi+0x1051/0x12a0 arch/x86/kvm/vmx/vmx.c:4809 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 6854 Comm: syz-executor665 Not tainted 5.9.0-rc7-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+0x1d6/0x29e lib/dump_stack.c:118 panic+0x2c0/0x800 kernel/panic.c:231 __warn+0x227/0x250 kernel/panic.c:600 report_bug+0x1b1/0x2e0 lib/bug.c:198 handle_bug+0x42/0x80 arch/x86/kernel/traps.c:234 exc_invalid_op+0x16/0x40 arch/x86/kernel/traps.c:254 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536 RIP: 0010:handle_exception_nmi+0x1051/0x12a0 arch/x86/kvm/vmx/vmx.c:4809 Code: fd 98 00 e9 17 f1 ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c da f0 ff ff 48 89 df e8 a9 fd 98 00 e9 cd f0 ff ff e8 1f 19 59 00 <0f> 0b e9 e0 f6 ff ff 89 d1 80 e1 07 80 c1 03 38 c1 0f 8c f4 f1 ff RSP: 0018:ffffc90000e979b0 EFLAGS: 00010293 RAX: ffffffff811be461 RBX: fffffffffffffff8 RCX: ffff888091f42200 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001 RBP: 0000000000000000 R08: ffffffff811bdb3a R09: ffffed1014faf071 R10: ffffed1014faf071 R11: 0000000000000000 R12: ffff8880a7d78380 R13: 1ffff11014faf026 R14: ffff8880a7d78040 R15: 0000000000000002 vcpu_enter_guest+0x6725/0x8a50 arch/x86/kvm/x86.c:8655 vcpu_run+0x332/0xc00 arch/x86/kvm/x86.c:8720 kvm_arch_vcpu_ioctl_run+0x451/0x8f0 arch/x86/kvm/x86.c:8937 kvm_vcpu_ioctl+0x64f/0xa50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3230 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:739 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x443bb9 Code: e8 dc a3 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 db 00 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fff4f9aff08 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000443bb9 RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 RBP: 00000000006ce018 R08: 0000000000000000 R09: 00000000004002c8 R10: 0000000000000012 R11: 0000000000000246 R12: 0000000000404120 R13: 00000000004041b0 R14: 0000000000000000 R15: 0000000000000000 Kernel Offset: disabled Rebooting in 86400 seconds.. --- This report 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 issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches