net: qrtr: Broadcast messages only from control port

The broadcast node id should only be sent with the control port id. Signed-off-by: Arun Kumar Neelakantam <[email protected]> Signed-off-by: David S. Miller <[email protected]>
gibsson · Jul 5, 2018 · fdf5fd3 · fdf5fd3
1 parent a9ba23d
commit fdf5fd3
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/net/qrtr/qrtr.c b/net/qrtr/qrtr.c
@@ -764,6 +764,10 @@ static int qrtr_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
 	node = NULL;
 	if (addr->sq_node == QRTR_NODE_BCAST) {
 		enqueue_fn = qrtr_bcast_enqueue;
+		if (addr->sq_port != QRTR_PORT_CTRL) {
+			release_sock(sk);
+			return -ENOTCONN;
+		}
 	} else if (addr->sq_node == ipc->us.sq_node) {
 		enqueue_fn = qrtr_local_enqueue;
 	} else {