------------[ cut here ]------------ WARNING: CPU: 0 PID: 252 at fs/io_uring.c:1164 req_ref_get fs/io_uring.c:1164 [inline] WARNING: CPU: 0 PID: 252 at fs/io_uring.c:1164 io_wq_submit_work+0x272/0x300 fs/io_uring.c:6731 Modules linked in: CPU: 0 PID: 252 Comm: kworker/u4:5 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 d3 21 91 ff 83 fb 7f 76 1b e8 89 1a 91 ff be 04 00 00 00 4c 89 ef e8 bc 62 d8 ff f0 ff 45 a4 e9 41 fe ff ff e8 6e 1a 91 ff <0f> 0b eb dc e8 65 1a 91 ff 4c 89 e7 e8 ad dc fb ff 48 85 c0 49 89 RSP: 0018:ffffc9000153f8c0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 000000000000007f RCX: 0000000000000000 RDX: ffff888012bd8000 RSI: ffffffff81e506d2 RDI: 0000000000000003 RBP: ffff8880ae9da478 R08: 000000000000007f R09: ffff8880ae9da41f R10: ffffffff81e506ad R11: 0000000000000000 R12: ffff8880ae9da3c0 R13: ffff8880ae9da41c R14: ffff8880ae9da418 R15: 0000000000100000 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000970004 CR3: 00000000a4d55000 CR4: 0000000000350ee0 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