Increase LOCKDEP_CIRCULAR_QUEUE_BITS to avoid this warning:
------------[ cut here ]------------
lockdep bfs error:-1
WARNING: kernel/locking/lockdep.c:2059 at print_bfs_bug+0x24/0x40 kernel/locking/lockdep.c:2059, CPU#1: kworker/u8:9/1112
Modules linked in:
CPU: 1 UID: 0 PID: 1112 Comm: kworker/u8:9 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Workqueue: events_unbound flush_to_ldisc
RIP: 0010:print_bfs_bug+0x26/0x40 kernel/locking/lockdep.c:2059
Code: 90 90 90 90 55 53 89 fb e8 37 44 35 03 89 c5 e8 20 ff ff ff 85 ed 74 17 83 fb ff 0f 84 e8 6d 3c ff 48 8d 3d fc 93 40 0f 89 de <67> 48 0f b9 3a 5b 5d c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00
RSP: 0018:ffffc90000a08368 EFLAGS: 00010082
RAX: 000000000000003b RBX: 00000000ffffffff RCX: 0000000000000000
RDX: 000000000000003b RSI: 00000000ffffffff RDI: ffffffff91261ab0
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000506 R11: fffffffffffe53a8 R12: ffffc90000a083e0
R13: ffff888026f3d850 R14: ffffc90000a08420 R15: ffff888026f3ca80
FS:  0000000000000000(0000) GS:ffff888123eda000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff823ded158 CR3: 0000000075f0f000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 check_irq_usage+0x332/0x810 kernel/locking/lockdep.c:2816
 check_prev_add+0xfe/0xe60 kernel/locking/lockdep.c:3169
 check_prevs_add kernel/locking/lockdep.c:3284 [inline]
 validate_chain kernel/locking/lockdep.c:3908 [inline]
 __lock_acquire+0x136c/0x1a40 kernel/locking/lockdep.c:5237
 lock_acquire kernel/locking/lockdep.c:5868 [inline]
 lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825
 __raw_spin_lock include/linux/spinlock_api_smp.h:158 [inline]
 _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:158
 class_raw_spinlock_constructor include/linux/spinlock.h:535 [inline]
 pcpu_alloc+0x1d4/0x350 lib/debugobjects.c:281
 alloc_object lib/debugobjects.c:475 [inline]
 lookup_object_or_alloc.part.0+0xc7/0x4f0 lib/debugobjects.c:702
 lookup_object_or_alloc lib/debugobjects.c:682 [inline]
 debug_object_activate+0x2fd/0x4b0 lib/debugobjects.c:875
 debug_rcu_head_queue kernel/rcu/rcu.h:236 [inline]
 __call_rcu_common.constprop.0+0x35/0x9b0 kernel/rcu/tree.c:3144
 xa_node_free lib/xarray.c:260 [inline]
 xas_delete_node lib/xarray.c:503 [inline]
 update_node lib/xarray.c:767 [inline]
 xas_store+0xccb/0x1a30 lib/xarray.c:852
 __xa_erase+0xb6/0x150 lib/xarray.c:1649
 xa_erase+0x24/0x40 lib/xarray.c:1670
 hsr_forget_seq_block net/hsr/hsr_framereg.c:319 [inline]
 hsr_get_seq_block+0x3f4/0x510 net/hsr/hsr_framereg.c:339
 hsr_check_duplicate.isra.0+0x7f/0x120 net/hsr/hsr_framereg.c:601
 hsr_forward_do net/hsr/hsr_forward.c:550 [inline]
 hsr_forward_skb+0xbb7/0x28d0 net/hsr/hsr_forward.c:743
 send_hsr_supervision_frame+0x696/0xbc0 net/hsr/hsr_device.c:364
 hsr_announce+0x169/0x3e0 net/hsr/hsr_device.c:421
 call_timer_fn+0x19a/0x610 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1799 [inline]
 __run_timers+0x757/0xb00 kernel/time/timer.c:2374
 __run_timer_base kernel/time/timer.c:2386 [inline]
 __run_timer_base kernel/time/timer.c:2378 [inline]
 run_timer_base+0x114/0x190 kernel/time/timer.c:2395
 run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405
 handle_softirqs+0x1ea/0x9b0 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1062
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:console_flush_one_record+0xac3/0xe50 kernel/printk/printk.c:3270
Code: 00 e8 71 25 2a 00 9c 5d 81 e5 00 02 00 00 31 ff 48 89 ee e8 bf d1 21 00 48 85 ed 0f 85 d7 01 00 00 e8 11 d7 21 00 fb 4c 89 e8 <48> c1 e8 03 42 80 3c 38 00 0f 85 64 03 00 00 48 8b 0c 24 48 8b 6b
RSP: 0018:ffffc900057c7660 EFLAGS: 00000293
RAX: ffffffff8f9ace58 RBX: ffffffff8f9ace00 RCX: ffffffff81e88ac1
RDX: ffff888026f3ca80 RSI: ffffffff81e88acf RDI: ffff888026f3ca80
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 00000000000028b5
R13: ffffffff8f9ace58 R14: ffffc900057c76e0 R15: dffffc0000000000
 console_flush_all kernel/printk/printk.c:3343 [inline]
 __console_flush_and_unlock kernel/printk/printk.c:3373 [inline]
 console_unlock+0x103/0x260 kernel/printk/printk.c:3413
 vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2479
 _printk+0xcf/0x110 kernel/printk/printk.c:2504
 bt_err+0xec/0x122 net/bluetooth/lib.c:293
 h4_recv+0x152/0x1d0 drivers/bluetooth/hci_h4.c:119
 hci_uart_tty_receive+0x254/0x750 drivers/bluetooth/hci_ldisc.c:660
 tty_ldisc_receive_buf+0x15a/0x1a0 drivers/tty/tty_buffer.c:398
 tty_port_default_receive_buf+0x70/0xb0 drivers/tty/tty_port.c:37
 receive_buf drivers/tty/tty_buffer.c:452 [inline]
 flush_to_ldisc+0x26b/0x730 drivers/tty/tty_buffer.c:502
 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322
 process_scheduled_works kernel/workqueue.c:3405 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
----------------
Code disassembly (best guess):
   0:	90                   	nop
   1:	90                   	nop
   2:	90                   	nop
   3:	90                   	nop
   4:	55                   	push   %rbp
   5:	53                   	push   %rbx
   6:	89 fb                	mov    %edi,%ebx
   8:	e8 37 44 35 03       	call   0x3354444
   d:	89 c5                	mov    %eax,%ebp
   f:	e8 20 ff ff ff       	call   0xffffff34
  14:	85 ed                	test   %ebp,%ebp
  16:	74 17                	je     0x2f
  18:	83 fb ff             	cmp    $0xffffffff,%ebx
  1b:	0f 84 e8 6d 3c ff    	je     0xff3c6e09
  21:	48 8d 3d fc 93 40 0f 	lea    0xf4093fc(%rip),%rdi        # 0xf409424
  28:	89 de                	mov    %ebx,%esi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	5b                   	pop    %rbx
  30:	5d                   	pop    %rbp
  31:	c3                   	ret
  32:	cc                   	int3
  33:	cc                   	int3
  34:	cc                   	int3
  35:	cc                   	int3
  36:	66                   	data16
  37:	66                   	data16
  38:	2e                   	cs
  39:	0f                   	.byte 0xf
  3a:	1f                   	(bad)
  3b:	84 00                	test   %al,(%rax)
  3d:	00 00                	add    %al,(%rax)