BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 PID: 8529 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: hci1507 hci_power_on
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x188/0x20d lib/dump_stack.c:118
 add_chain_cache kernel/locking/lockdep.c:3048 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3147 [inline]
 validate_chain kernel/locking/lockdep.c:3168 [inline]
 __lock_acquire.cold+0x11/0x2c1 kernel/locking/lockdep.c:4190
 lock_acquire+0x197/0x420 kernel/locking/lockdep.c:4720
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
 vprintk_emit+0x11a/0x710 kernel/printk/printk.c:1974
 vprintk_func+0x79/0x17e kernel/printk/printk_safe.c:386
 printk+0xba/0xed kernel/printk/printk.c:2054
 hci_dev_hold include/net/bluetooth/hci_core.h:1041 [inline]
 hci_dev_do_open+0x628/0x1920 net/bluetooth/hci_core.c:1544
 hci_power_on+0x11d/0x610 net/bluetooth/hci_core.c:2193
 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