================================
WARNING: inconsistent lock state
5.10.0-syzkaller #0 Not tainted
--------------------------------
inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
ksoftirqd/1/16 [HC0[0]:SC1[1]:HE1:SE0] takes:
ffff888021b960a8 (&file_data->lock){+.?.}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline]
ffff888021b960a8 (&file_data->lock){+.?.}-{2:2}, at: io_file_data_ref_zero+0x6a/0x3a0 fs/io_uring.c:7361
{SOFTIRQ-ON-W} state was registered at:
  lock_acquire+0x114/0x5e0 kernel/locking/lockdep.c:5437
  __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
  _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
  spin_lock include/linux/spinlock.h:354 [inline]
  io_sqe_files_register fs/io_uring.c:7496 [inline]
  __io_uring_register fs/io_uring.c:9665 [inline]
  __do_sys_io_uring_register fs/io_uring.c:9755 [inline]
  __se_sys_io_uring_register+0x2416/0x2850 fs/io_uring.c:9737
  do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
  entry_SYSCALL_64_after_hwframe+0x44/0xa9
irq event stamp: 27605044
hardirqs last  enabled at (27605044): [<ffffffff8945fe2e>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
hardirqs last  enabled at (27605044): [<ffffffff8945fe2e>] _raw_spin_unlock_irqrestore+0x2e/0x60 kernel/locking/spinlock.c:191
hardirqs last disabled at (27605043): [<ffffffff8945fc8d>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline]
hardirqs last disabled at (27605043): [<ffffffff8945fc8d>] _raw_spin_lock_irqsave+0x4d/0xa0 kernel/locking/spinlock.c:159
softirqs last  enabled at (27605016): [<ffffffff8146c5e3>] run_ksoftirqd+0x63/0xa0 kernel/softirq.c:653
softirqs last disabled at (27605021): [<ffffffff8146c5e3>] run_ksoftirqd+0x63/0xa0 kernel/softirq.c:653

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&file_data->lock);
  <Interrupt>
    lock(&file_data->lock);

 *** DEADLOCK ***

2 locks held by ksoftirqd/1/16:
 #0: ffffffff8bce8680 (rcu_callback){....}-{0:0}, at: rcu_lock_acquire+0x0/0x20 kernel/rcu/tree.c:1374
 #1: ffffffff8bce85c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:252

stack backtrace:
CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.10.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x137/0x1be lib/dump_stack.c:120
 print_usage_bug+0xbfe/0x1080 kernel/locking/lockdep.c:3740
 mark_lock_irq kernel/locking/lockdep.c:3751 [inline]
 mark_lock+0x182d/0x1ef0 kernel/locking/lockdep.c:4411
 mark_usage kernel/locking/lockdep.c:4306 [inline]
 __lock_acquire+0xbe6/0x5e90 kernel/locking/lockdep.c:4786
 lock_acquire+0x114/0x5e0 kernel/locking/lockdep.c:5437
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
 spin_lock include/linux/spinlock.h:354 [inline]
 io_file_data_ref_zero+0x6a/0x3a0 fs/io_uring.c:7361
 percpu_ref_put_many include/linux/percpu-refcount.h:322 [inline]
 percpu_ref_put+0x1cb/0x1d0 include/linux/percpu-refcount.h:338
 rcu_do_batch kernel/rcu/tree.c:2489 [inline]
 rcu_core+0x7db/0x10c0 kernel/rcu/tree.c:2723
 __do_softirq+0x307/0x6be kernel/softirq.c:298
 run_ksoftirqd+0x63/0xa0 kernel/softirq.c:653
 smpboot_thread_fn+0x572/0x970 kernel/smpboot.c:165
 kthread+0x39a/0x3c0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296