BUG: MAX_LOCKDEP_CHAINS too low! turning off the locking correctness validator. CPU: 0 PID: 7325 Comm: kworker/u5:15 Not tainted 5.7.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: hci1681 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:3082 [inline] lookup_chain_cache_add kernel/locking/lockdep.c:3181 [inline] validate_chain kernel/locking/lockdep.c:3202 [inline] __lock_acquire.cold+0x11/0x3f8 kernel/locking/lockdep.c:4355 lock_acquire+0x1f2/0x8f0 kernel/locking/lockdep.c:4934 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x8c/0xbf kernel/locking/spinlock.c:159 prepare_to_wait_event+0x5b/0x650 kernel/sched/wait.c:280 __hci_req_sync+0x67a/0x830 net/bluetooth/hci_request.c:236 __hci_init net/bluetooth/hci_core.c:893 [inline] hci_dev_do_open+0xfa5/0x18b0 net/bluetooth/hci_core.c:1551 hci_power_on+0x11d/0x610 net/bluetooth/hci_core.c:2221 process_one_work+0x965/0x16a0 kernel/workqueue.c:2268 worker_thread+0x96/0xe20 kernel/workqueue.c:2414 kthread+0x388/0x470 kernel/kthread.c:268 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351