BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 PID: 4454 Comm: kworker/u5:3 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/26/2026
Workqueue: hci63 hci_rx_work
Call trace:
 dump_backtrace+0x1c0/0x1ec 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+0xf4/0x15c 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+0x1864/0x6800 kernel/locking/lockdep.c:5049
 lock_acquire+0x20c/0x63c kernel/locking/lockdep.c:5662
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x54/0x6c kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:351 [inline]
 sysfs_do_create_link_sd+0x40/0x120 fs/sysfs/symlink.c:34
 sysfs_do_create_link fs/sysfs/symlink.c:80 [inline]
 sysfs_create_link+0x74/0x94 fs/sysfs/symlink.c:92
 device_add_class_symlinks drivers/base/core.c:3419 [inline]
 device_add+0x5a8/0xf90 drivers/base/core.c:3645
 hci_conn_add_sysfs+0xbc/0x1c8 net/bluetooth/hci_sysfs.c:46
 hci_conn_complete_evt+0x790/0x1068 net/bluetooth/hci_event.c:3215
 hci_event_func net/bluetooth/hci_event.c:7415 [inline]
 hci_event_packet+0x700/0xf18 net/bluetooth/hci_event.c:7467
 hci_rx_work+0x328/0xa84 net/bluetooth/hci_core.c:4109
 process_one_work+0x7f8/0x13a4 kernel/workqueue.c:2292
 worker_thread+0x8c4/0xfec kernel/workqueue.c:2439
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850
Bluetooth: hci63: command 0x0409 tx timeout
Bluetooth: hci64: unexpected cc 0x0c03 length: 249 > 1
Bluetooth: hci64: unexpected cc 0x1003 length: 249 > 9
Bluetooth: hci64: unexpected cc 0x1001 length: 249 > 9
Bluetooth: hci64: unexpected cc 0x0c23 length: 249 > 4
Bluetooth: hci64: unexpected cc 0x0c25 length: 249 > 3
Bluetooth: hci64: unexpected cc 0x0c38 length: 249 > 2
Bluetooth: hci62: command 0x0419 tx timeout
Bluetooth: hci65: unexpected cc 0x0c03 length: 249 > 1
Bluetooth: hci65: unexpected cc 0x1003 length: 249 > 9
Bluetooth: hci65: unexpected cc 0x1001 length: 249 > 9
Bluetooth: hci65: unexpected cc 0x0c23 length: 249 > 4
Bluetooth: hci65: unexpected cc 0x0c25 length: 249 > 3
Bluetooth: hci65: unexpected cc 0x0c38 length: 249 > 2
Bluetooth: hci63: command 0x040f tx timeout
Bluetooth: hci65: command 0x0409 tx timeout
Bluetooth: hci64: command 0x041b tx timeout
Bluetooth: hci66: unexpected cc 0x0c03 length: 249 > 1
Bluetooth: hci66: unexpected cc 0x1003 length: 249 > 9
Bluetooth: hci66: unexpected cc 0x1001 length: 249 > 9
Bluetooth: hci66: unexpected cc 0x0c23 length: 249 > 4
Bluetooth: hci66: unexpected cc 0x0c25 length: 249 > 3
Bluetooth: hci66: unexpected cc 0x0c38 length: 249 > 2
Bluetooth: hci63: command 0x0419 tx timeout