------------[ cut here ]------------
WARNING: CPU: 1 PID: 8 at lib/percpu-refcount.c:113 __percpu_ref_exit+0x30/0x54 lib/percpu-refcount.c:113
Modules linked in:
CPU: 1 PID: 8 Comm: kworker/u4:0 Not tainted 5.12.0-rc7-syzkaller-00032-g7f75285ca572 #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 : ffff800012ac3c90
x29: ffff800012ac3c90 x28: f5ff0000212e75d0 
x27: ffff800011d01e90 x26: f5ff0000212e7410 
x25: f5ff0000212e70c0 x24: f5ff0000212e75b0 
x23: f5ff0000212e7000 x22: ffff8000126b7980 
x21: f2ff000021234500 x20: f6ff000021338600 
x19: f5ff0000212e7000 x18: 0000000000000014 
x17: 000000000d3b1ced x16: 0000000028f6f62a 
x15: 0000345d756ba78e x14: 00000000000002bb 
x13: 00000000000002bb x12: 0000000000000001 
x11: ffff800011d0a788 x10: f2ff00001fe6c000 
x9 : 0000000000085115 x8 : 0000000080000000 
x7 : ffff00007fbf95c0 x6 : ffff800012932400 
x5 : 00000000f0000000 x4 : fffffc000092c008 
x3 : 0000000000000001 x2 : ffff00007fbf9680 
x1 : ffff80001054ef40 x0 : 00007bff82ab2d68 
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:8480 [inline]
 io_ring_exit_work+0x370/0x540 fs/io_uring.c:8617
 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:960
---[ end trace 742210e773536b9e ]---