io_uring: ensure that send/sendmsg and recv/recvmsg check sqe->ioprio

commit 7391142 upstream.

All other opcodes correctly check if this is set and -EINVAL if it is
and they don't support that field, for some reason the these were
forgotten.

This was unified a bit differently in the upstream tree, but had the
same effect as making sure we error on this field. Rather than have
a painful backport of the upstream commit, just fixup the mentioned
opcodes.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

fs/io_uring.c

@@ -4366,6 +4366,8 @@ static int io_sendmsg_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
 
 	if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL))
 		return -EINVAL;
+	if (unlikely(sqe->addr2 || sqe->splice_fd_in || sqe->ioprio))
+		return -EINVAL;
 
 	sr->msg_flags = READ_ONCE(sqe->msg_flags);
 	sr->umsg = u64_to_user_ptr(READ_ONCE(sqe->addr));
@@ -4601,6 +4603,8 @@ static int io_recvmsg_prep(struct io_kiocb *req,
 
 	if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL))
 		return -EINVAL;
+	if (unlikely(sqe->addr2 || sqe->splice_fd_in || sqe->ioprio))
+		return -EINVAL;
 
 	sr->msg_flags = READ_ONCE(sqe->msg_flags);
 	sr->umsg = u64_to_user_ptr(READ_ONCE(sqe->addr));