BUG: MAX_LOCKDEP_CHAINS too low! turning off the locking correctness validator. CPU: 1 PID: 4355 Comm: kworker/u5:2 Not tainted 6.1.119-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: hci51 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 lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 lookup_chain_cache_add kernel/locking/lockdep.c:3772 [inline] validate_chain kernel/locking/lockdep.c:3793 [inline] __lock_acquire+0x1b88/0x7680 kernel/locking/lockdep.c:5049 lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5662 local_lock_acquire+0x3c/0x98 include/linux/local_lock_internal.h:29 ___slab_alloc+0x1c8/0xee0 mm/slub.c:3099 __slab_alloc mm/slub.c:3279 [inline] slab_alloc_node mm/slub.c:3364 [inline] __kmem_cache_alloc_node+0x2c8/0x388 mm/slub.c:3437 kmalloc_trace+0x48/0x94 mm/slab_common.c:1026 kmalloc include/linux/slab.h:557 [inline] kzalloc include/linux/slab.h:693 [inline] hci_chan_create+0xb0/0x2b0 net/bluetooth/hci_conn.c:2665 l2cap_conn_add+0x78/0x974 net/bluetooth/l2cap_core.c:7892 l2cap_connect_cfm+0x12c/0xe5c net/bluetooth/l2cap_core.c:8293 hci_connect_cfm+0xa0/0x138 include/net/bluetooth/hci_core.h:1787 le_conn_complete_evt+0xa88/0xfe0 net/bluetooth/hci_event.c:5864 hci_le_conn_complete_evt+0x114/0x404 net/bluetooth/hci_event.c:5890 hci_le_meta_evt+0x2b8/0x47c net/bluetooth/hci_event.c:7059 hci_event_func net/bluetooth/hci_event.c:7370 [inline] hci_event_packet+0x6f8/0x109c net/bluetooth/hci_event.c:7425 hci_rx_work+0x318/0xa68 net/bluetooth/hci_core.c:4085 process_one_work+0x7ac/0x1404 kernel/workqueue.c:2292 worker_thread+0x8e4/0xfec kernel/workqueue.c:2439 kthread+0x250/0x2d8 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864 Bluetooth: hci51: command 0x0409 tx timeout Bluetooth: hci51: command 0x040f tx timeout Bluetooth: hci52: command 0x040f tx timeout Bluetooth: hci52: command 0x0419 tx timeout