------------[ cut here ]------------
WARNING: CPU: 1 PID: 11905 at fs/io_uring.c:1164 req_ref_get fs/io_uring.c:1164 [inline]
WARNING: CPU: 1 PID: 11905 at fs/io_uring.c:1164 io_wq_submit_work+0x272/0x300 fs/io_uring.c:6731
Modules linked in:
CPU: 1 PID: 11905 Comm: kworker/u4:12 Not tainted 5.14.0-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:1164 [inline]
RIP: 0010:io_wq_submit_work+0x272/0x300 fs/io_uring.c:6731
Code: e8 a3 9b 91 ff 83 fb 7f 76 1b e8 e9 92 91 ff be 04 00 00 00 4c 89 ef e8 1c 60 d8 ff f0 ff 45 a4 e9 41 fe ff ff e8 ce 92 91 ff <0f> 0b eb dc e8 c5 92 91 ff 4c 89 e7 e8 ad dc fb ff 48 85 c0 49 89
RSP: 0018:ffffc900033ef8c0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 000000000000007f RCX: 0000000000000000
RDX: ffff888073e62180 RSI: ffffffff81e3c242 RDI: 0000000000000003
RBP: ffff8880400045b8 R08: 000000000000007f R09: ffff88804000455f
R10: ffffffff81e3c21d R11: 0000000000000000 R12: ffff888040004500
R13: ffff88804000455c R14: ffff888040004558 R15: 0000000000100000
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd2557c8ac8 CR3: 000000007ba4f000 CR4: 00000000001526e0
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+0x2a9/0x5e0 fs/io-wq.c:950
 io_wqe_cancel_pending_work+0x6c/0x130 fs/io-wq.c:968
 io_wq_cancel_cb+0x162/0x5d0 fs/io-wq.c:1003
 io_uring_try_cancel_iowq fs/io_uring.c:9471 [inline]
 io_uring_try_cancel_requests+0x881/0xc30 fs/io_uring.c:9491
 io_ring_exit_work+0x137/0x1980 fs/io_uring.c:9291
 process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295