------------[ cut here ]------------
WARNING: CPU: 0 PID: 28011 at lib/percpu-refcount.c:113 __percpu_ref_exit+0x30/0x54 lib/percpu-refcount.c:113
Modules linked in:
CPU: 0 PID: 28011 Comm: kworker/u4:2 Not tainted 5.12.0-rc5-syzkaller #0
Hardware name: linux,dummy-virt (DT)
Workqueue: events_unbound io_ring_exit_work
pstate: 00400009 (nzcv daif +PAN -UAO -TCO BTYPE=--)
pc : __percpu_ref_exit+0x30/0x54 lib/percpu-refcount.c:113
lr : percpu_ref_exit+0x20/0x6c lib/percpu-refcount.c:134
sp : ffff800015eebc90
x29: ffff800015eebc90 x28: f6ff0000132355d0 
x27: ffff800011d01c80 x26: f6ff000013235410 
x25: f6ff0000132350c0 x24: f6ff0000132355b0 
x23: f6ff000013235000 x22: ffff8000126b7980 
x21: fdff000015c78c00 x20: f0ff000015c2d000 
x19: f6ff000013235000 x18: 0000000000000000 
x17: 0000000000000000 x16: 0000000000000000 
x15: 000002e5c1f3917c x14: 0000000000000000 
x13: 0000000000000030 x12: 0101010101010101 
x11: 7f7f7f7f7f7f7f7f x10: f1ff0000123ab000 
x9 : 000000000091eea3 x8 : 0000000080000000 
x7 : ffff00007fbf9690 x6 : ffff800012932400 
x5 : ffff800012932400 x4 : fffffc00001f0008 
x3 : dead000000000122 x2 : ffff00007fbf9750 
x1 : ffff80001054eb60 x0 : 00007bff82ab2eb8 
Call trace:
 __percpu_ref_exit+0x30/0x54 lib/percpu-refcount.c:113
 percpu_ref_exit+0x20/0x6c lib/percpu-refcount.c:134
 io_ring_ctx_free fs/io_uring.c:8452 [inline]
 io_ring_exit_work+0x370/0x540 fs/io_uring.c:8589
 process_one_work+0x1d8/0x364 kernel/workqueue.c:2275
 worker_thread+0x70/0x434 kernel/workqueue.c:2421
 kthread+0x174/0x180 kernel/kthread.c:292
 ret_from_fork+0x10/0x34 arch/arm64/kernel/entry.S:958
---[ end trace 82bc12ddacee4463 ]---