------------[ cut here ]------------
WARNING: CPU: 0 PID: 23760 at lib/percpu-refcount.c:113 __percpu_ref_exit+0x30/0x54 lib/percpu-refcount.c:113
Modules linked in:
CPU: 0 PID: 23760 Comm: kworker/u4:2 Tainted: G        W         5.12.0-rc7-syzkaller-00058-g2f7b98d1e55c #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 : ffff800012da3c90
x29: ffff800012da3c90 x28: f1ff00001a06a5d0 
x27: ffff800011d01e90 x26: f1ff00001a06a410 
x25: f1ff00001a06a0c0 x24: f1ff00001a06a5b0 
x23: f1ff00001a06a000 x22: ffff8000126b7980 
x21: f3ff0000169be300 x20: f6ff000018e5a600 
x19: f1ff00001a06a000 x18: 0000000000000000 
x17: 0000000000000000 x16: 0000000000000000 
x15: 0000000000000002 x14: 0000000000000000 
x13: 0000000000000030 x12: 0101010101010101 
x11: 7f7f7f7f7f7f7f7f x10: fdff0000162c2000 
x9 : 00000000005d4dac x8 : 0000000080000000 
x7 : ffff00007fbf9690 x6 : ffff800012932400 
x5 : ffff800012932400 x4 : fffffc00006c0008 
x3 : dead000000000122 x2 : ffff00007fbf9750 
x1 : ffff80001054ef40 x0 : 00007bff82a264f8 
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 0f5876bd1e833358 ]---