------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(class_idx > MAX_LOCKDEP_KEYS)
WARNING: CPU: 1 PID: 0 at kernel/locking/lockdep.c:3673 __lock_acquire+0x1887/0x3fb0 kernel/locking/lockdep.c:3673
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.1.0-rc5+ #73
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 panic+0x2cb/0x65c kernel/panic.c:214
 __warn.cold+0x20/0x45 kernel/panic.c:571
 report_bug+0x263/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:291
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973
RIP: 0010:__lock_acquire+0x1887/0x3fb0 kernel/locking/lockdep.c:3673
Code: d2 0f 85 7b 1f 00 00 44 8b 3d 29 0d 07 08 45 85 ff 0f 85 20 f3 ff ff 48 c7 c6 80 3f 6b 87 48 c7 c7 c0 15 6b 87 e8 67 e3 eb ff <0f> 0b e9 09 f3 ff ff 0f 0b e9 41 f1 ff ff 8b 1d c5 32 05 09 85 db
RSP: 0018:ffff8880ae907a98 EFLAGS: 00010086
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000100 RSI: ffffffff815afcb6 RDI: ffffed1015d20f45
RBP: ffff8880ae907bd0 R08: ffff8880aa28c340 R09: fffffbfff11335fd
R10: fffffbfff11335fc R11: ffffffff8899afe3 R12: 0000000066c4c36e
R13: 0000000000000023 R14: 00000000000c236e R15: 0000000000000000
 lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:4211
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:144
 spin_lock include/linux/spinlock.h:329 [inline]
 __queue_work+0x99f/0x10e0 kernel/workqueue.c:1446
 delayed_work_timer_fn+0x5d/0x90 kernel/workqueue.c:1616
 call_timer_fn+0x190/0x720 kernel/time/timer.c:1325
 expire_timers kernel/time/timer.c:1358 [inline]
 __run_timers kernel/time/timer.c:1681 [inline]
 __run_timers kernel/time/timer.c:1649 [inline]
 run_timer_softirq+0x44c/0x1700 kernel/time/timer.c:1694
 __do_softirq+0x266/0x95a kernel/softirq.c:293
 invoke_softirq kernel/softirq.c:374 [inline]
 irq_exit+0x180/0x1d0 kernel/softirq.c:414
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x14a/0x570 arch/x86/kernel/apic/apic.c:1062
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
 </IRQ>
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x54/0x90 kernel/locking/spinlock.c:192
Code: c0 c0 96 92 88 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 33 48 83 3d 45 1a 82 01 00 74 20 fb 66 0f 1f 44 00 00 <bf> 01 00 00 00 e8 62 5c 3d fa 65 8b 05 fb 70 f1 78 85 c0 74 06 41
RSP: 0018:ffff8880aa29fc70 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff11252d8 RBX: ffff8880aa28c340 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffff8880aa28cbbc
RBP: ffff8880aa29fc78 R08: ffff8880aa28c340 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880ae92cf80
R13: ffff8880a680c540 R14: 0000000000000000 R15: 0000000000000001
 finish_lock_switch kernel/sched/core.c:2627 [inline]
 finish_task_switch+0x146/0x780 kernel/sched/core.c:2727
 context_switch kernel/sched/core.c:2880 [inline]
 __schedule+0x81b/0x1cc0 kernel/sched/core.c:3518
 schedule_idle+0x58/0x80 kernel/sched/core.c:3589
 do_idle+0x192/0x560 kernel/sched/idle.c:286
 cpu_startup_entry+0x1b/0x20 kernel/sched/idle.c:353
 start_secondary+0x360/0x4d0 arch/x86/kernel/smpboot.c:267
 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243
Kernel Offset: disabled
Rebooting in 86400 seconds..