diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index eaa61e2..3c68cf9 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -992,17 +992,13 @@ static int mptcp_sendmsg_frag(struct sock *sk, struct sock *ssk,
 		psize = min_t(size_t, dfrag->data_len, avail_size);
 	}
 
-	/* tell the TCP stack to delay the push so that we can safely
-	 * access the skb after the sendpages call
-	 */
-	ret = do_tcp_sendpages(ssk, page, offset, psize,
-			       msg->msg_flags | MSG_SENDPAGE_NOTLAST | MSG_DONTWAIT);
-	if (ret <= 0) {
-		if (!retransmission)
-			iov_iter_revert(&msg->msg_iter, psize);
-		return ret;
+	tail = tcp_build_frag(ssk, psize, msg->msg_flags, page, offset, &psize);
+	if (!tail) {
+		tcp_remove_empty_skb(sk, tcp_write_queue_tail(ssk));
+		return -ENOMEM;
 	}
 
+	ret = psize;
 	frag_truesize += ret;
 	if (!retransmission) {
 		if (unlikely(ret < psize))
@@ -1026,20 +1022,15 @@ static int mptcp_sendmsg_frag(struct sock *sk, struct sock *ssk,
 		sk->sk_forward_alloc -= frag_truesize;
 	}
 
-	/* if the tail skb extension is still the cached one, collapsing
-	 * really happened. Note: we can't check for 'same skb' as the sk_buff
-	 * hdr on tail can be transmitted, freed and re-allocated by the
-	 * do_tcp_sendpages() call
+	/* if the tail skb is still the cached one, collapsing really happened.
 	 */
-	tail = tcp_write_queue_tail(ssk);
-	if (mpext && tail && mpext == skb_ext_find(tail, SKB_EXT_MPTCP)) {
+	if (skb == tail) {
 		WARN_ON_ONCE(!can_collapse);
 		mpext->data_len += ret;
 		goto out;
 	}
 
-	skb = tcp_write_queue_tail(ssk);
-	mpext = __skb_ext_set(skb, SKB_EXT_MPTCP, msk->cached_ext);
+	mpext = __skb_ext_set(tail, SKB_EXT_MPTCP, msk->cached_ext);
 	msk->cached_ext = NULL;
 
 	memset(mpext, 0, sizeof(*mpext));