Bluetooth: hci2: unexpected cc 0x1001 length: 249 > 9
Bluetooth: hci2: unexpected cc 0x0c23 length: 249 > 4
Bluetooth: hci2: unexpected cc 0x0c25 length: 249 > 3
Bluetooth: hci2: unexpected cc 0x0c38 length: 249 > 2
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 PID: 4328 Comm: kworker/u5:4 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Workqueue: hci2 hci_rx_work
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 add_chain_cache kernel/locking/lockdep.c:-1 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3772 [inline]
 validate_chain kernel/locking/lockdep.c:3793 [inline]
 __lock_acquire+0x1b40/0x6544 kernel/locking/lockdep.c:5049
 lock_acquire+0x20c/0x644 kernel/locking/lockdep.c:5662
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x6c/0xb4 kernel/locking/spinlock.c:162
 device_pm_check_callbacks+0x30/0x8e8 drivers/base/power/main.c:2011
 device_pm_add+0x70/0x2ec drivers/base/power/main.c:137
 device_add+0x80c/0xf94 drivers/base/core.c:3657
 hci_conn_add_sysfs+0xbc/0x1cc net/bluetooth/hci_sysfs.c:46
 hci_conn_complete_evt+0x71c/0xf94 net/bluetooth/hci_event.c:3201
 hci_event_func net/bluetooth/hci_event.c:7361 [inline]
 hci_event_packet+0x6f4/0xf08 net/bluetooth/hci_event.c:7413
 hci_rx_work+0x324/0xaa0 net/bluetooth/hci_core.c:4083
 process_one_work+0x7f4/0x13a8 kernel/workqueue.c:2292
 worker_thread+0x8c8/0xfbc kernel/workqueue.c:2439
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850