From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754042AbeD2RAu (ORCPT ); Sun, 29 Apr 2018 13:00:50 -0400 Received: from mail-io0-f197.google.com ([209.85.223.197]:39146 "EHLO mail-io0-f197.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753855AbeD2RAD (ORCPT ); Sun, 29 Apr 2018 13:00:03 -0400 X-Google-Smtp-Source: AB8JxZqOf6DUtdpfqSSGZ5H5zjAj4OTgdn67f3HZ1ED/4aIENgG3GsBZrStg7i6auPtWd4P8D9Nc4XGK5LZqALP1TNMWMJN+gLcH MIME-Version: 1.0 Date: Sun, 29 Apr 2018 10:00:03 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000170595056affab1c@google.com> Subject: WARNING in __mutex_unlock_slowpath From: syzbot To: hpa@zytor.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, mingo@redhat.com, pbonzini@redhat.com, rkrcmar@redhat.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, x86@kernel.org Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot hit the following crash on upstream commit bf8f5de17442bba5f811e7e724980730e079ee11 (Sat Apr 28 17:05:04 2018 +0000) MAINTAINERS: add myself as maintainer of AFFS syzbot dashboard link: https://syzkaller.appspot.com/bug?extid=35666cba7f0a337e2e79 C reproducer: https://syzkaller.appspot.com/x/repro.c?id=5686569910403072 syzkaller reproducer: https://syzkaller.appspot.com/x/repro.syz?id=5767017265102848 Raw console output: https://syzkaller.appspot.com/x/log.txt?id=6346308495343616 Kernel config: https://syzkaller.appspot.com/x/.config?id=7043958930931867332 compiler: gcc (GCC) 8.0.1 20180413 (experimental) IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+35666cba7f0a337e2e79@syzkaller.appspotmail.com It will help syzbot understand when the bug is fixed. See footer for details. If you forward the report, please keep this part and the footer. ------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(__owner_task(owner) != current) WARNING: CPU: 0 PID: 4525 at kernel/locking/mutex.c:1032 __mutex_unlock_slowpath+0x62e/0x8a0 kernel/locking/mutex.c:1032 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 4525 Comm: syz-executor809 Not tainted 4.17.0-rc2+ #22 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+0x1b9/0x294 lib/dump_stack.c:113 panic+0x22f/0x4de kernel/panic.c:184 __warn.cold.8+0x163/0x1b3 kernel/panic.c:536 report_bug+0x252/0x2d0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x1de/0x490 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:992 RIP: 0010:__mutex_unlock_slowpath+0x62e/0x8a0 kernel/locking/mutex.c:1032 RSP: 0018:ffff8801cf31f138 EFLAGS: 00010286 RAX: 0000000000000033 RBX: 1ffff10039e63e30 RCX: ffffffff8160b82d RDX: 0000000000000000 RSI: ffffffff816104e1 RDI: 0000000000000001 RBP: ffff8801cf31f2a8 R08: ffff8801d9042180 R09: fffffbfff11b0974 R10: fffffbfff11b0974 R11: ffffffff88d84ba3 R12: ffffffff8a713a20 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8801989d6b08 mutex_unlock+0xd/0x10 kernel/locking/mutex.c:614 kvm_hv_eventfd_deassign arch/x86/kvm/hyperv.c:1434 [inline] kvm_vm_ioctl_hv_eventfd+0x1ea/0x24b arch/x86/kvm/hyperv.c:1451 kvm_arch_vm_ioctl+0x155e/0x2690 arch/x86/kvm/x86.c:4563 kvm_vm_ioctl+0x246/0x1d90 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3100 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x1cf/0x16a0 fs/ioctl.c:684 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701 __do_sys_ioctl fs/ioctl.c:708 [inline] __se_sys_ioctl fs/ioctl.c:706 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:706 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4401f9 RSP: 002b:00007ffcd5727a48 EFLAGS: 00000217 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 6d766b2f7665642f RCX: 00000000004401f9 RDX: 0000000020000140 RSI: 000000004018aebd RDI: 00000000000000ee RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 R10: 00000000004002c8 R11: 0000000000000217 R12: 0000000000401720 R13: 00000000004017b0 R14: 0000000000000000 R15: 0000000000000000 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds.. --- This bug is generated by a dumb bot. 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