diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
index 1298d723c0e0..12e9294b02e0 100644
--- a/net/bluetooth/hci_sock.c
+++ b/net/bluetooth/hci_sock.c
@@ -1048,6 +1048,7 @@ static int hci_sock_recvmsg(struct socket *sock, struct msghdr *msg,
 	struct sock *sk = sock->sk;
 	struct sk_buff *skb;
 	int copied, err;
+	unsigned int skblen;
 
 	BT_DBG("sock %p, sk %p", sock, sk);
 
@@ -1064,6 +1065,7 @@ static int hci_sock_recvmsg(struct socket *sock, struct msghdr *msg,
 	if (!skb)
 		return err;
 
+	skblen = skb->len;
 	copied = skb->len;
 	if (len < copied) {
 		msg->msg_flags |= MSG_TRUNC;
@@ -1089,6 +1091,9 @@ static int hci_sock_recvmsg(struct socket *sock, struct msghdr *msg,
 
 	skb_free_datagram(sk, skb);
 
+	if (msg->msg_flags & MSG_TRUNC)
+		copied = skblen;
+
 	return err ? : copied;
 }