Pavel Begunkov 7a27472770 io_uring: don't modify req->poll for rw
__io_queue_proc() is used by both poll and apoll, so we should not
access req->poll directly but selecting right struct io_poll_iocb
depending on use case.

Reported-and-tested-by: syzbot+a84b8783366ecb1c65d0@syzkaller.appspotmail.com
Fixes: ea6a693d862d ("io_uring: disable multishot poll for double poll add cases")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/4a6a1de31142d8e0250fe2dfd4c8923d82a5bbfc.1621251795.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-05-17 07:28:48 -06:00
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