to #28170604

commit 10bea96dcc13ad841d53bdcc9d8e731e9e0ad58f upstream

Add it to pair with prepare_to_wait() in an attempt to avoid
anything weird in the field.

Fixes: b41e98524e42 ("io_uring: add per-task callback handler")
Reported-by: syzbot+0c3370f235b74b3cfd97@syzkaller.appspotmail.com
Signed-off-by: NHillf Danton <hdanton@sina.com>
Signed-off-by: NJens Axboe <axboe@kernel.dk>
Acked-by: NJoseph Qi <joseph.qi@linux.alibaba.com>
Signed-off-by: NXiaoguang Wang <xiaoguang.wang@linux.alibaba.com>