BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 4764 Comm: kworker/u9:2 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Workqueue: hci5 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 add_chain_cache kernel/locking/lockdep.c:-1 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3855 [inline]
 validate_chain kernel/locking/lockdep.c:3876 [inline]
 __lock_acquire+0xf88/0x2f44 kernel/locking/lockdep.c:5237
 lock_acquire+0x140/0x368 kernel/locking/lockdep.c:5868
 __mutex_lock_common kernel/locking/mutex.c:646 [inline]
 __mutex_lock+0x160/0xef8 kernel/locking/mutex.c:820
 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:873
 device_pm_add+0x80/0x310 drivers/base/power/main.c:152
 device_add+0x488/0x9e4 drivers/base/core.c:3654
 hci_conn_add_sysfs+0xc0/0x1f4 net/bluetooth/hci_sysfs.c:48
 hci_conn_complete_evt+0x6f0/0xde0 net/bluetooth/hci_event.c:3200
 hci_event_func net/bluetooth/hci_event.c:7796 [inline]
 hci_event_packet+0x5c4/0xa00 net/bluetooth/hci_event.c:7847
 hci_rx_work+0x2fc/0xd1c net/bluetooth/hci_core.c:4077
 process_one_work kernel/workqueue.c:3314 [inline]
 process_scheduled_works+0x79c/0x1098 kernel/workqueue.c:3397
 worker_thread+0x754/0xba0 kernel/workqueue.c:3478
 kthread+0x2f8/0x3c8 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
Bluetooth: hci5: command tx timeout
Bluetooth: hci5: command tx timeout
Bluetooth: hci5: command tx timeout
Bluetooth: hci5: command tx timeout