[IRDA]: Check error return from memcpy_fromiovec()

net/irda/af_irda.c

@@ -1307,7 +1307,11 @@ static int irda_sendmsg(struct kiocb *iocb, struct socket *sock,
 	skb_reserve(skb, self->max_header_size + 16);
 
 	asmptr = skb->h.raw = skb_put(skb, len);
-	memcpy_fromiovec(asmptr, msg->msg_iov, len);
+	err = memcpy_fromiovec(asmptr, msg->msg_iov, len);
+	if (err) {
+		kfree_skb(skb);
+		return err;
+	}
 
 	/*
 	 * Just send the message to TinyTP, and let it deal with possible
@@ -1550,7 +1554,11 @@ static int irda_sendmsg_dgram(struct kiocb *iocb, struct socket *sock,
 
 	IRDA_DEBUG(4, "%s(), appending user data\n", __FUNCTION__);
 	asmptr = skb->h.raw = skb_put(skb, len);
-	memcpy_fromiovec(asmptr, msg->msg_iov, len);
+	err = memcpy_fromiovec(asmptr, msg->msg_iov, len);
+	if (err) {
+		kfree_skb(skb);
+		return err;
+	}
 
 	/*
 	 * Just send the message to TinyTP, and let it deal with possible
@@ -1613,7 +1621,11 @@ static int irda_sendmsg_ultra(struct kiocb *iocb, struct socket *sock,
 
 	IRDA_DEBUG(4, "%s(), appending user data\n", __FUNCTION__);
 	asmptr = skb->h.raw = skb_put(skb, len);
-	memcpy_fromiovec(asmptr, msg->msg_iov, len);
+	err = memcpy_fromiovec(asmptr, msg->msg_iov, len);
+	if (err) {
+		kfree_skb(skb);
+		return err;
+	}
 
 	err = irlmp_connless_data_request(self->lsap, skb);
 	if (err) {