------------[ cut here ]------------
WARNING: CPU: 1 PID: 5621 at fs/io_uring.c:1183 req_ref_put_and_test fs/io_uring.c:1183 [inline]
WARNING: CPU: 1 PID: 5621 at fs/io_uring.c:1183 req_ref_put_and_test fs/io_uring.c:1178 [inline]
WARNING: CPU: 1 PID: 5621 at fs/io_uring.c:1183 io_put_req_find_next fs/io_uring.c:2392 [inline]
WARNING: CPU: 1 PID: 5621 at fs/io_uring.c:1183 io_poll_task_func+0x81d/0x9f0 fs/io_uring.c:5412
Modules linked in:
CPU: 1 PID: 5621 Comm: syz-executor.2 Not tainted 5.15.0-rc7-next-20211029-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:req_ref_put_and_test fs/io_uring.c:1183 [inline]
RIP: 0010:req_ref_put_and_test fs/io_uring.c:1178 [inline]
RIP: 0010:io_put_req_find_next fs/io_uring.c:2392 [inline]
RIP: 0010:io_poll_task_func+0x81d/0x9f0 fs/io_uring.c:5412
Code: e8 e8 f3 da ff f0 ff 8d 80 00 00 00 0f 94 c3 31 ff 89 de e8 15 33 94 ff 84 db 0f 84 47 f8 ff ff e9 a4 fa ff ff e8 23 2f 94 ff <0f> 0b eb c5 e8 4a f0 da ff e9 0e f8 ff ff 4c 89 f7 e8 0d f0 da ff
RSP: 0018:ffffc90002dffd98 EFLAGS: 00010212
RAX: 0000000000023faf RBX: 000000000000007f RCX: ffffc90017592000
RDX: 0000000000040000 RSI: ffffffff81e39d0d RDI: 0000000000000003
RBP: ffff888077f0b3c0 R08: 000000000000007f R09: ffff888077f0b443
R10: ffffffff81e39cd1 R11: 0000000000000000 R12: ffff888077f0b440
R13: ffff888030f00000 R14: 00000000000002c8 R15: ffff8880188e43c0
FS:  00007f16aea17700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31d22000 CR3: 000000008741c000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 tctx_task_work+0x1b3/0x630 fs/io_uring.c:2207
 task_work_run+0xdd/0x1a0 kernel/task_work.c:164
 tracehook_notify_signal include/linux/tracehook.h:214 [inline]
 handle_signal_work kernel/entry/common.c:146 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0x256/0x290 kernel/entry/common.c:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f16b14c2ae9
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:00007f16aea17188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 00000000000002ff RBX: 00007f16b15d6020 RCX: 00007f16b14c2ae9
RDX: 0000000000000000 RSI: 00000000000002ff RDI: 0000000000000003
RBP: 00007f16b151cf25 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffee46546f R14: 00007f16aea17300 R15: 0000000000022000
 </TASK>