------------[ cut here ]------------
WARNING: CPU: 0 PID: 11925 at fs/io-wq.c:244 io_wqe_wake_worker fs/io-wq.c:244 [inline]
WARNING: CPU: 0 PID: 11925 at fs/io-wq.c:244 io_wqe_enqueue+0x7fe/0x920 fs/io-wq.c:751
Modules linked in:
CPU: 0 PID: 11925 Comm: syz-executor.0 Not tainted 5.13.0-rc2-next-20210518-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:io_wqe_wake_worker fs/io-wq.c:244 [inline]
RIP: 0010:io_wqe_enqueue+0x7fe/0x920 fs/io-wq.c:751
Code: ef e8 a6 5c d8 ff e9 25 f9 ff ff 4c 89 ef e8 99 5c d8 ff e9 4b f9 ff ff 48 89 ef e8 8c 5c d8 ff e9 97 fa ff ff e8 62 fa 92 ff <0f> 0b e9 00 fb ff ff 48 8b 3c 24 e8 82 5c d8 ff e9 99 fd ff ff 4c
RSP: 0018:ffffc900164bfc78 EFLAGS: 00010212
RAX: 000000000002e671 RBX: 0000000000000001 RCX: ffffc900016d1000
RDX: 0000000000040000 RSI: ffffffff81e2d96e RDI: 0000000000000003
RBP: ffff88802a20d810 R08: 0000000000000000 R09: ffff88802a20d8a3
R10: ffffffff81e2d46c R11: 0000000000000000 R12: ffff88802a20d800
R13: ffff88802a20d898 R14: ffff88802a20d8e8 R15: 0000000000000000
FS:  00007f477a9f9700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2cc26000 CR3: 000000001815f000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 io_queue_async_work+0x2d0/0x5f0 fs/io_uring.c:1274
 __io_queue_sqe+0x806/0x10f0 fs/io_uring.c:6438
 __io_req_task_submit+0x103/0x120 fs/io_uring.c:2039
 io_async_task_func+0x23e/0x4c0 fs/io_uring.c:5074
 __tctx_task_work fs/io_uring.c:1910 [inline]
 tctx_task_work+0x144/0x560 fs/io_uring.c:1924
 task_work_run+0xdd/0x1a0 kernel/task_work.c:164
 tracehook_notify_signal include/linux/tracehook.h:212 [inline]
 handle_signal_work kernel/entry/common.c:145 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
 exit_to_user_mode_prepare+0x247/0x280 kernel/entry/common.c:208
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:301
 do_syscall_64+0x3e/0xb0 arch/x86/entry/common.c:57
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
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:00007f477a9f9218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000056bf88 RCX: 00000000004665d9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000056bf88
RBP: 000000000056bf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf8c
R13: 00007ffec10a1fef R14: 00007f477a9f9300 R15: 0000000000022000