WARNING: CPU: 1 PID: 27729 at kernel/locking/lockdep.c:4548 remove_class_from_lock_chain kernel/locking/lockdep.c:4528 [inline]
WARNING: CPU: 1 PID: 27729 at kernel/locking/lockdep.c:4548 remove_class_from_lock_chains kernel/locking/lockdep.c:4568 [inline]
WARNING: CPU: 1 PID: 27729 at kernel/locking/lockdep.c:4548 zap_class+0x745/0xde0 kernel/locking/lockdep.c:4607
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 27729 Comm: kworker/1:0 Not tainted 5.1.0-rc6 #79
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events pwq_unbound_release_workfn
Call Trace:
 __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:remove_class_from_lock_chain kernel/locking/lockdep.c:4548 [inline]
RIP: 0010:remove_class_from_lock_chains kernel/locking/lockdep.c:4568 [inline]
RIP: 0010:zap_class+0x745/0xde0 kernel/locking/lockdep.c:4607
Code: 0f b6 14 30 4c 89 e0 83 e0 07 83 c0 01 38 d0 0f 8c 79 ff ff ff 84 d2 0f 84 71 ff ff ff 4c 89 e7 e8 20 04 52 00 e9 64 ff ff ff <0f> 0b e8 64 de d6 01 e9 4e fb ff ff 48 89 55 c0 4c 89 4d c8 e8 42
RSP: 0018:ffff8880a879fc10 EFLAGS: 00010012
RAX: 0000000000010000 RBX: 2182072b7ff0736e RCX: ffffffff832f5b3e
RDX: 00000000000068ee RSI: ffffffff832f5b8a RDI: 0000000000000006
RBP: ffff8880a879fc68 R08: ffff88804e6243c0 R09: ffffffff8a0a3e90
R10: 0000000000000393 R11: 0000000003930a26 R12: ffffffff89bf1d88
R13: 0000000000000000 R14: dffffc0000000000 R15: ffffffff89bf1d80
 __lockdep_free_key_range+0x64/0x120 kernel/locking/lockdep.c:4730
 lockdep_unregister_key+0x201/0x4c0 kernel/locking/lockdep.c:4922
 wq_unregister_lockdep kernel/workqueue.c:3455 [inline]
 pwq_unbound_release_workfn+0x233/0x2f0 kernel/workqueue.c:3675
 process_one_work+0x98e/0x1790 kernel/workqueue.c:2269
 worker_thread+0x98/0xe40 kernel/workqueue.c:2415
 kthread+0x357/0x430 kernel/kthread.c:253
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..