------------[ cut here ]------------
WARNING: CPU: 1 PID: 22026 at fs/io_uring.c:1164 req_ref_get fs/io_uring.c:1164 [inline]
WARNING: CPU: 1 PID: 22026 at fs/io_uring.c:1164 io_wq_submit_work+0x272/0x300 fs/io_uring.c:6733
Modules linked in:
CPU: 1 PID: 22026 Comm: syz-executor.0 Not tainted 5.14.0-next-20210908-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:req_ref_get fs/io_uring.c:1164 [inline]
RIP: 0010:io_wq_submit_work+0x272/0x300 fs/io_uring.c:6733
Code: e8 23 37 93 ff 83 fb 7f 76 1b e8 d9 2f 93 ff be 04 00 00 00 4c 89 ef e8 fc 57 d9 ff f0 ff 45 a4 e9 41 fe ff ff e8 be 2f 93 ff <0f> 0b eb dc e8 b5 2f 93 ff 4c 89 e7 e8 ed db fb ff 48 85 c0 49 89
RSP: 0018:ffffc90004f47898 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 000000000000007f RCX: 0000000000000000
RDX: ffff888078531c80 RSI: ffffffff81e2dda2 RDI: 0000000000000003
RBP: ffff888062c32978 R08: 000000000000007f R09: ffff888062c3291f
R10: ffffffff81e2dd7d R11: 0000000000000000 R12: ffff888062c328c0
R13: ffff888062c3291c R14: ffff888062c32918 R15: 0000000000100000
FS:  00007ffa38d28700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4c3d719028 CR3: 000000001ded0000 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+0x2a9/0x5e0 fs/io-wq.c:950
 io_wqe_cancel_pending_work+0x98/0x130 fs/io-wq.c:968
 io_wq_destroy fs/io-wq.c:1185 [inline]
 io_wq_put_and_exit+0x7d1/0xc70 fs/io-wq.c:1198
 io_uring_clean_tctx fs/io_uring.c:9609 [inline]
 io_uring_cancel_generic+0x5fe/0x740 fs/io_uring.c:9689
 io_uring_files_cancel include/linux/io_uring.h:16 [inline]
 do_exit+0x265/0x2a30 kernel/exit.c:780
 do_group_exit+0x125/0x310 kernel/exit.c:922
 get_signal+0x47f/0x2160 kernel/signal.c:2868
 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:865
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:209
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffa38d28188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 0000000000000001 RBX: 000000000056c0f0 RCX: 00000000004665f9
RDX: 0000000000000000 RSI: 0000000000000304 RDI: 0000000000000003
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0f0
R13: 00007ffe1bbeeb3f R14: 00007ffa38d28300 R15: 0000000000022000