------------[ cut here ]------------
WARNING: io_uring/io_uring.c:3026 at io_ring_exit_work+0x26c/0xc60 io_uring/io_uring.c:3026, CPU#1: kworker/u8:5/1014
Modules linked in:
CPU: 1 UID: 0 PID: 1014 Comm: kworker/u8:5 Not tainted syzkaller #0 PREEMPT 
Hardware name: linux,dummy-virt (DT)
Workqueue: iou_exit io_ring_exit_work
pstate: 80000005 (Nzcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : io_ring_exit_work+0x26c/0xc60 io_uring/io_uring.c:3026
lr : class_mutex_destructor include/linux/mutex.h:253 [inline]
lr : io_req_caches_free io_uring/io_uring.c:2837 [inline]
lr : io_ring_exit_work+0x250/0xc60 io_uring/io_uring.c:3024
sp : ffff80008ef97940
x29: ffff80008ef97940 x28: 0000000000000005 x27: ffff800085974480
x26: 000000010001179a x25: 1fffe000043a6c00 x24: ffff800087320280
x23: dfff800000000000 x22: ffff000021d36040 x21: ffff000021d366d0
x20: 0000000000000000 x19: ffff000021d36000 x18: 0000000000000000
x17: ffff7fffe2d65000 x16: ffff00006a050504 x15: 0000000000001574
x14: 0000000000001570 x13: 0000000000000000 x12: ffff700011df2f17
x11: 1ffff00011df2f16 x10: ffff700011df2f16 x9 : dfff800000000000
x8 : ffff80008ef978b7 x7 : 0000000000000001 x6 : ffff700011df2f16
x5 : ffff80008ef978b0 x4 : ffff700011df2f17 x3 : ffff8000855d2fb0
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 000000010001179b
Call trace:
 io_ring_exit_work+0x26c/0xc60 io_uring/io_uring.c:3026 (P)
 process_one_work+0x7cc/0x18d4 kernel/workqueue.c:3257
 process_scheduled_works kernel/workqueue.c:3340 [inline]
 worker_thread+0x734/0xb84 kernel/workqueue.c:3421
 kthread+0x348/0x5fc kernel/kthread.c:463
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860
irq event stamp: 1270616
hardirqs last  enabled at (1270615): [<ffff80008021dabc>] flush_delayed_work+0x30/0xd8 kernel/workqueue.c:4319
hardirqs last disabled at (1270616): [<ffff8000855bd81c>] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:412
softirqs last  enabled at (1270038): [<ffff8000801c9b20>] softirq_handle_end kernel/softirq.c:468 [inline]
softirqs last  enabled at (1270038): [<ffff8000801c9b20>] handle_softirqs+0x88c/0xdb4 kernel/softirq.c:650
softirqs last disabled at (1270029): [<ffff8000800107c0>] __do_softirq+0x14/0x20 kernel/softirq.c:656
---[ end trace 0000000000000000 ]---