------------[ cut here ]------------
WARNING: CPU: 1 PID: 8 at fs/io_uring.c:1135 req_ref_get fs/io_uring.c:1137 [inline]
WARNING: CPU: 1 PID: 8 at fs/io_uring.c:1135 io_wq_submit_work+0x1e8/0x270 fs/io_uring.c:6520
Modules linked in:
CPU: 1 PID: 8 Comm: kworker/u4:0 Not tainted 5.14.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound io_ring_exit_work
RIP: 0010:req_ref_get fs/io_uring.c:1135 [inline]
RIP: 0010:io_wq_submit_work+0x1e8/0x270 fs/io_uring.c:6520
Code: 03 38 d0 7c 04 84 d2 75 50 8b 43 a4 83 c0 7f 83 f8 7f 76 16 be 04 00 00 00 4c 89 e7 e8 91 27 de ff f0 ff 43 a4 e9 a9 fe ff ff <0f> 0b eb e6 48 89 ef e8 5c 6d fc ff 48 85 c0 48 89 c7 0f 84 bc fe
RSP: 0018:ffffc90000cd78e0 EFLAGS: 00010246
RAX: 000000000000007f RBX: ffff888045a0f978 RCX: ffffffff81c82cb1
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff888045a0f91c
RBP: ffff888045a0f8c0 R08: 0000000000000000 R09: ffff888045a0f91f
R10: ffffed1008b41f23 R11: 0000000000000002 R12: ffff888045a0f91c
R13: ffff888045a0f918 R14: ffffed1008b41802 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9c2b3f0000 CR3: 000000000a88e000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 io_run_cancel fs/io-wq.c:809 [inline]
 io_acct_cancel_pending_work.isra.0+0x23f/0x5c0 fs/io-wq.c:950
 io_wqe_cancel_pending_work+0x73/0xe0 fs/io-wq.c:968
 io_wq_cancel_cb+0x185/0x410 fs/io-wq.c:1003
 io_uring_try_cancel_iowq fs/io_uring.c:9260 [inline]
 io_uring_try_cancel_requests+0x725/0xb80 fs/io_uring.c:9280
 io_ring_exit_work+0x117/0x1610 fs/io_uring.c:9080
 process_one_work+0x84c/0x13d0 kernel/workqueue.c:2276
 worker_thread+0x598/0x1040 kernel/workqueue.c:2422
 kthread+0x38b/0x460 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295