------------[ cut here ]------------ WARNING: CPU: 0 PID: 12 at kernel/locking/lockdep.c:4820 remove_class_from_lock_chain kernel/locking/lockdep.c:4800 [inline] WARNING: CPU: 0 PID: 12 at kernel/locking/lockdep.c:4820 remove_class_from_lock_chains kernel/locking/lockdep.c:4840 [inline] WARNING: CPU: 0 PID: 12 at kernel/locking/lockdep.c:4820 zap_class+0x76b/0xe60 kernel/locking/lockdep.c:4880 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.4.0-rc2-next-20191009 #0 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+0x2e3/0x75c kernel/panic.c:221 __warn.cold+0x2f/0x35 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:1028 RIP: 0010:remove_class_from_lock_chain kernel/locking/lockdep.c:4820 [inline] RIP: 0010:remove_class_from_lock_chains kernel/locking/lockdep.c:4840 [inline] RIP: 0010:zap_class+0x76b/0xe60 kernel/locking/lockdep.c:4880 Code: c1 e8 03 42 0f b6 14 30 4c 89 e0 83 e0 07 83 c0 01 38 d0 7c 80 84 d2 0f 84 78 ff ff ff 4c 89 e7 e8 ca 39 56 00 e9 6b ff ff ff <0f> 0b e8 2e 13 e7 01 e9 4e fb ff ff 48 89 4d a8 48 89 55 c0 e8 ec RSP: 0018:ffff8880a9907c00 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffffffff8a10fce0 RCX: 0000000000005a77 RDX: 0000000000000000 RSI: ffffffff8341558a RDI: 0000000000000006 RBP: ffff8880a9907c68 R08: ffff8880a98fe300 R09: fffffbfff14eece2 R10: fffffbfff14eece1 R11: ffffffff8a77670f R12: ffffffff8a759c78 R13: ffffffff8a2e2788 R14: dffffc0000000000 R15: ffffffff8a2e2780 __lockdep_free_key_range+0x64/0x120 kernel/locking/lockdep.c:5003 lockdep_unregister_key+0x201/0x4c0 kernel/locking/lockdep.c:5195 wq_unregister_lockdep kernel/workqueue.c:3455 [inline] pwq_unbound_release_workfn+0x233/0x2f0 kernel/workqueue.c:3675 process_one_work+0x9af/0x1740 kernel/workqueue.c:2269 worker_thread+0x98/0xe40 kernel/workqueue.c:2415 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Kernel Offset: disabled Rebooting in 86400 seconds..