io_uring: fail poll arm on queue proc failure
Check the ipt.error value, it must have been either cleared to zero or set to another error than the default -EINVAL if we don't go through the waitqueue proc addition. Just give up on poll at that point and return failure, this will fallback to async work. io_poll_add() doesn't suffer from this failure case, as it returns the error value directly. Cc: stable@vger.kernel.org # v5.7+ Reported-by:<syzbot+a730016dc0bdce4f6ff5@syzkaller.appspotmail.com> Reviewed-by:
Stefano Garzarella <sgarzare@redhat.com> Signed-off-by:
Jens Axboe <axboe@kernel.dk>
parent
6d816e08
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