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: 0 PID: 4336 Comm: kworker/u5:8 Not tainted 6.1.148-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
 __stack_depot_save+0x1c4/0x4b8 lib/stackdepot.c:479
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x64/0x80 mm/kasan/common.c:52
 kasan_save_alloc_info+0x28/0x34 mm/kasan/generic.c:505
 __kasan_slab_alloc+0x70/0x88 mm/kasan/common.c:328
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook+0x74/0x43c mm/slab.h:737
 slab_alloc_node mm/slub.c:3398 [inline]
 slab_alloc mm/slub.c:3406 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3413 [inline]
 kmem_cache_alloc+0x234/0x318 mm/slub.c:3422
 radix_tree_node_alloc+0x180/0x340 lib/radix-tree.c:251
 idr_get_free+0x240/0x8ac lib/radix-tree.c:1504
 idr_alloc_u32 lib/idr.c:46 [inline]
 idr_alloc_cyclic+0x154/0x468 lib/idr.c:125
 __kernfs_new_node+0x120/0x5d8 fs/kernfs/dir.c:620
 kernfs_new_node+0x11c/0x230 fs/kernfs/dir.c:690
 kernfs_create_link+0x98/0x1e0 fs/kernfs/symlink.c:39
 sysfs_do_create_link_sd+0x8c/0x120 fs/sysfs/symlink.c:44
 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:3439 [inline]
 device_add+0x7a0/0xf94 drivers/base/core.c:3645
 hci_conn_add_sysfs+0xbc/0x1cc net/bluetooth/hci_sysfs.c:46
 le_conn_complete_evt+0xa24/0xf8c net/bluetooth/hci_event.c:5812
 hci_le_conn_complete_evt+0x114/0x3f8 net/bluetooth/hci_event.c:5861
 hci_le_meta_evt+0x2c0/0x4a4 net/bluetooth/hci_event.c:7031
 hci_event_func net/bluetooth/hci_event.c:7342 [inline]
 hci_event_packet+0x6ac/0xf08 net/bluetooth/hci_event.c:7397
 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:849