Increase LOCKDEP_CIRCULAR_QUEUE_BITS to avoid this warning: ------------[ cut here ]------------ lockdep bfs error:-1 WARNING: CPU: 1 PID: 37 at kernel/locking/lockdep.c:2059 print_bfs_bug+0x29/0x50 kernel/locking/lockdep.c:2059 Modules linked in: CPU: 1 UID: 0 PID: 37 Comm: kworker/u8:2 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Workqueue: events_unbound fsnotify_mark_destroy_workfn RIP: 0010:print_bfs_bug+0x29/0x50 kernel/locking/lockdep.c:2059 Code: 90 55 53 89 fb e8 a7 d4 d9 02 89 c5 e8 00 a6 ff ff 85 ed 74 19 83 fb ff 74 1c 90 48 c7 c7 f9 ff d9 8c 89 de e8 c8 d9 e6 ff 90 <0f> 0b 90 90 5b 5d c3 cc cc cc cc cc 48 c7 c7 ed 42 eb 8c e8 df 10 RSP: 0018:ffffc90000ae7320 EFLAGS: 00010046 RAX: 8083d3d14a752800 RBX: 00000000ffffffff RCX: ffff88801d2f0000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed101712487b R12: ffffffff95555778 R13: ffffffff955557e8 R14: ffff88801d2f0bd8 R15: 000000000000001c FS: 0000000000000000(0000) GS:ffff888126efc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055555e50d808 CR3: 0000000023346000 CR4: 00000000003526f0 Call Trace: check_irq_usage kernel/locking/lockdep.c:-1 [inline] check_prev_add kernel/locking/lockdep.c:3169 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain+0x1a4b/0x2140 kernel/locking/lockdep.c:3908 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5237 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 _raw_spin_lock_nested+0x32/0x50 kernel/locking/spinlock.c:378 raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:638 raw_spin_rq_lock kernel/sched/sched.h:1546 [inline] __task_rq_lock+0xc1/0x470 kernel/sched/core.c:714 ttwu_runnable kernel/sched/core.c:3765 [inline] try_to_wake_up+0x102/0x12b0 kernel/sched/core.c:4211 rt_mutex_wake_up_q kernel/locking/rtmutex.c:566 [inline] rt_mutex_slowunlock+0x5ae/0x8a0 kernel/locking/rtmutex.c:1469 spin_unlock_irqrestore include/linux/spinlock_rt.h:122 [inline] srcu_funnel_gp_start kernel/rcu/srcutree.c:1097 [inline] srcu_gp_start_if_needed+0xb11/0x10b0 kernel/rcu/srcutree.c:1356 __call_srcu kernel/rcu/srcutree.c:1401 [inline] __synchronize_srcu+0x2fa/0x390 kernel/rcu/srcutree.c:1453 fsnotify_mark_destroy_workfn+0x101/0x2f0 fs/notify/mark.c:996 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245