------------[ cut here ]------------
WARNING: CPU: 1 PID: 2890 at kernel/locking/lockdep.c:4816 remove_class_from_lock_chain kernel/locking/lockdep.c:4796 [inline]
WARNING: CPU: 1 PID: 2890 at kernel/locking/lockdep.c:4816 remove_class_from_lock_chains kernel/locking/lockdep.c:4836 [inline]
WARNING: CPU: 1 PID: 2890 at kernel/locking/lockdep.c:4816 zap_class+0x76b/0xe60 kernel/locking/lockdep.c:4876
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 2890 Comm: kworker/1:38 Not tainted 5.5.0-rc6-syzkaller #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+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:remove_class_from_lock_chain kernel/locking/lockdep.c:4816 [inline]
RIP: 0010:remove_class_from_lock_chains kernel/locking/lockdep.c:4836 [inline]
RIP: 0010:zap_class+0x76b/0xe60 kernel/locking/lockdep.c:4876
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 9a c5 58 00 e9 6b ff ff ff <0f> 0b e8 de 03 3f 02 e9 4e fb ff ff 48 89 4d a8 48 89 55 c0 e8 bc
RSP: 0018:ffffc9000838fc00 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffffffff8acab5a0 RCX: 00000000000063f6
RDX: 0000000000000000 RSI: ffffffff839ad1aa RDI: 0000000000000006
RBP: ffffc9000838fc68 R08: ffff88809f3b00c0 R09: fffffbfff165e392
R10: fffffbfff165e391 R11: ffffffff8b2f1c8f R12: ffffffff8b2d9bf0
R13: ffffffff8ae7dcc8 R14: dffffc0000000000 R15: ffffffff8ae7dcc0
 __lockdep_free_key_range+0x64/0x120 kernel/locking/lockdep.c:4999
 lockdep_unregister_key+0x201/0x4c0 kernel/locking/lockdep.c:5191
 wq_unregister_lockdep kernel/workqueue.c:3456 [inline]
 pwq_unbound_release_workfn+0x233/0x2f0 kernel/workqueue.c:3676
 process_one_work+0x9af/0x1740 kernel/workqueue.c:2264
 worker_thread+0x98/0xe40 kernel/workqueue.c:2410
 kthread+0x361/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Shutting down cpus with NMI
Kernel Offset: disabled
Rebooting in 86400 seconds..