------------[ cut here ]------------
WARNING: CPU: 1 PID: 24 at lib/percpu-refcount.c:113 __percpu_ref_exit+0x78/0xe0 lib/percpu-refcount.c:113
Modules linked in:
CPU: 1 PID: 24 Comm: kworker/u4:1 Not tainted 5.12.0-rc1-syzkaller-00022-gf69d02e37a85 #0
Hardware name: linux,dummy-virt (DT)
Workqueue: events_unbound io_ring_exit_work
pstate: 00000005 (nzcv daif -PAN -UAO -TCO BTYPE=--)
pc : __percpu_ref_exit+0x78/0xe0 lib/percpu-refcount.c:113
lr : percpu_ref_exit+0x44/0x134 lib/percpu-refcount.c:134
sp : ffff00000cca7ae0
x29: ffff00000cca7ae0 x28: ffff00000c733380 
x27: 1fffe000018f40c3 x26: 1fffe00001887801 
x25: ffff00001bfe4008 x24: ffff0000194f5c00 
x23: ffff00001bfe46f8 x22: ffff0000194f5c00 
x21: 1fffe000037fc800 x20: 00007bff9ed7e6f8 
x19: ffff00001bfe4000 x18: ffff00006a377b48 
x17: 0000000000000000 x16: 0000000000000000 
x15: ffff80001b0d9810 x14: 1fffe00001994ee6 
x13: 0000000000000016 x12: ffff600001994f3b 
x11: 1fffe00001994f3a x10: 1fffe000018e679b 
x9 : dfff800000000000 x8 : ffff00000c733cd8 
x7 : ffff80001b0ed6e0 x6 : 00000000f3f3f3f3 
x5 : 00000000f2f2f200 x4 : ffff600001994f16 
x3 : 1fffe000018e6671 x2 : 1fffe0000329eb82 
x1 : 0000000000000000 x0 : ffff800012255c30 
Call trace:
 __percpu_ref_exit+0x78/0xe0 lib/percpu-refcount.c:113
 percpu_ref_exit+0x44/0x134 lib/percpu-refcount.c:134
 io_ring_ctx_free fs/io_uring.c:8445 [inline]
 io_ring_exit_work+0x210/0x390 fs/io_uring.c:8552
 process_one_work+0x798/0x1764 kernel/workqueue.c:2275
 worker_thread+0x3d4/0xcd0 kernel/workqueue.c:2421
 kthread+0x320/0x3bc kernel/kthread.c:292
 ret_from_fork+0x10/0x3c arch/arm64/kernel/entry.S:958