------------[ cut here ]------------
WARNING: CPU: 1 PID: 2133 at io_uring/io_uring.c:2982 io_ring_exit_work+0x144/0x5bc io_uring/io_uring.c:2982
Modules linked in:
CPU: 1 UID: 0 PID: 2133 Comm: kworker/u8:9 Not tainted syzkaller #0 PREEMPT 
Hardware name: linux,dummy-virt (DT)
Workqueue: iou_exit io_ring_exit_work
pstate: 80402009 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : io_ring_exit_work+0x144/0x5bc io_uring/io_uring.c:2982
lr : class_mutex_destructor include/linux/mutex.h:228 [inline]
lr : io_req_caches_free io_uring/io_uring.c:2781 [inline]
lr : io_ring_exit_work+0x134/0x5bc io_uring/io_uring.c:2980
sp : ffff80008860bcc0
x29: ffff80008860bcc0 x28: f9f000000a6f6c40 x27: f9f000000a6eec10
x26: f9f000000a6f683f x25: 0000000000000000 x24: 0000000000000005
x23: ffff8000829089c0 x22: 000000010000b199 x21: f9f000000a6f6c10
x20: f9f000000a6f6840 x19: f9f000000a6f6800 x18: 0000000000000000
x17: fff07ffffcffa000 x16: ffff800080008000 x15: 0000000000000002
x14: 00000000000002af x13: 0000000000000000 x12: ffff800082911258
x11: 00000000000000c0 x10: 6083c7a34b324cb4 x9 : 3ce6f1e1c5d80b71
x8 : f0f00000062636f8 x7 : 0000000000000004 x6 : ffff80008293d7f0
x5 : 0000000000000002 x4 : fbffff3fffffffff x3 : 0000000000000000
x2 : f0f0000006262500 x1 : f0f0000006262500 x0 : 000000010000b1af
Call trace:
 io_ring_exit_work+0x144/0x5bc io_uring/io_uring.c:2982 (P)
 process_one_work+0x178/0x2cc kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x250/0x358 kernel/workqueue.c:3400
 kthread+0x130/0x1fc kernel/kthread.c:463
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860
---[ end trace 0000000000000000 ]---