BUG: MAX_LOCKDEP_KEYS too low!
turning off the locking correctness validator.
CPU: 0 PID: 9043 Comm: kworker/u5:2 Not tainted 5.6.0-rc3-next-20200228-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: hci2841 hci_power_on
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x188/0x20d lib/dump_stack.c:118
 register_lock_class.cold+0x18/0x21 kernel/locking/lockdep.c:1225
 __lock_acquire+0xfa/0x5270 kernel/locking/lockdep.c:4072
 lock_acquire+0x197/0x420 kernel/locking/lockdep.c:4720
 flush_workqueue+0x126/0x14c0 kernel/workqueue.c:2777
 drain_workqueue+0x1a7/0x3c0 kernel/workqueue.c:2942
 hci_dev_do_close+0x23a/0xf70 net/bluetooth/hci_core.c:1714
 hci_power_on+0x1aa/0x610 net/bluetooth/hci_core.c:2211
 process_one_work+0x94b/0x1690 kernel/workqueue.c:2266
 worker_thread+0x96/0xe20 kernel/workqueue.c:2412
 kthread+0x357/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352