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 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 990EFC33CA1 for ; Wed, 8 Jan 2020 20:03:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 77F4E20705 for ; Wed, 8 Jan 2020 20:03:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726641AbgAHUDL (ORCPT ); Wed, 8 Jan 2020 15:03:11 -0500 Received: from mail-il1-f198.google.com ([209.85.166.198]:50400 "EHLO mail-il1-f198.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725920AbgAHUDK (ORCPT ); Wed, 8 Jan 2020 15:03:10 -0500 Received: by mail-il1-f198.google.com with SMTP id z12so2901750ilh.17 for ; Wed, 08 Jan 2020 12:03:10 -0800 (PST) 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=QQ9jOivQ5dWlzW4Uw5qGquEM4NzrI4svewZeUOhhorU=; b=SwwkEbI0J85tIZIzLiPiud2RQTZTw4TQDW+FRVG3ImBFmmPODtCuBjpGkBRp0nmIOB nTsIOhgyneH7LmIbrL5dhvw0hLYDYlEg9419gU7O1vFOwFe/bAdsxDhX8WKI700Bmys8 vdVNop7SWFtroGuJZlqGuaLNYfgqlNUDsxROT9NMBs8VbrE/qOWnualaiMKuJVCLOQ2t QqXe+d18PIkybhXxKoi/drm+BwpQk1UCfvnFbKoTwz3ROGmjDX0dzZYyDlRYV+YUzIkW I2ysFfr09k59OX34jfA7FNp+7z8Zq4ms1L6UNzGK142BCiN5DmveN9vMSxv+ZaaAs7i8 HkSg== X-Gm-Message-State: APjAAAVxkZlkIDWUT7Nu9rfKbXf6gnGxttDKiSIPGhHMCnX6YXuHhzi6 34WFR/l3zfkyHAGnuG7p4Sv9BbsWSmSre4sVMmOGrdTDuz3i X-Google-Smtp-Source: APXvYqz0BI05gYGVmIHHEvl+gsQDHnvqHHzmwZlsd320DiZ+LMJUChh+kqDODJf2mW1P003T7f2zAqVujnPBE/0HiLWSqTd4jZ3W MIME-Version: 1.0 X-Received: by 2002:a6b:731a:: with SMTP id e26mr4600874ioh.254.1578513789740; Wed, 08 Jan 2020 12:03:09 -0800 (PST) Date: Wed, 08 Jan 2020 12:03:09 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000b5eb9e059ba66172@google.com> Subject: WARNING in cleanup_srcu_struct 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"; format=flowed; delsp=yes 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: 3a562aee Merge tag 'for-5.5-rc4-tag' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13672869e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=f2f3ef188b7e16cf dashboard link: https://syzkaller.appspot.com/bug?extid=1b1043fa771618e68377 compiler: gcc (GCC) 9.0.0 20181231 (experimental) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+1b1043fa771618e68377@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 0 PID: 18326 at kernel/rcu/srcutree.c:376 cleanup_srcu_struct+0x248/0x2d0 kernel/rcu/srcutree.c:395 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 18326 Comm: syz-executor.1 Not tainted 5.5.0-rc4-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+0x197/0x210 lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:221 __warn.cold+0x2f/0x3e kernel/panic.c:582 report_bug+0x289/0x300 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:174 [inline] fixup_bug arch/x86/kernel/traps.c:169 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:267 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:286 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:cleanup_srcu_struct+0x248/0x2d0 kernel/rcu/srcutree.c:376 Code: 84 24 48 04 00 00 00 00 00 00 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 0b 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 <0f> 0b e9 3c ff ff ff 48 8b 7d c0 e8 48 4c 51 00 e9 bd fe ff ff 48 RSP: 0018:ffffc900019a7b60 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000004 RCX: ffffc90004ed9000 RDX: 000000000000b393 RSI: ffffffff839b22b7 RDI: 0000000000000006 RBP: ffffc900019a7bb0 R08: ffff8880a6bdc580 R09: 0000000000000040 R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90001ee9c48 R13: 0000000000000000 R14: ffffc90001ee19f0 R15: dffffc0000000000 kvm_page_track_cleanup+0x19/0x20 arch/x86/kvm/mmu/page_track.c:167 kvm_arch_destroy_vm+0x4aa/0x5f0 arch/x86/kvm/x86.c:9667 kvm_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:758 [inline] kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:3519 [inline] kvm_dev_ioctl+0x11af/0x17d0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3571 vfs_ioctl fs/ioctl.c:47 [inline] file_ioctl fs/ioctl.c:545 [inline] do_vfs_ioctl+0x977/0x14e0 fs/ioctl.c:732 ksys_ioctl+0xab/0xd0 fs/ioctl.c:749 __do_sys_ioctl fs/ioctl.c:756 [inline] __se_sys_ioctl fs/ioctl.c:754 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:754 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45af49 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fe9be746c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045af49 RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe9be7476d4 R13: 00000000004c44c7 R14: 00000000004da970 R15: 00000000ffffffff 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.