net: qrtr: Broadcast messages only from control port

[ Upstream commit fdf5fd3975666804118e62c69de25dc85cc0909c ]

The broadcast node id should only be sent with the control port id.

Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/qrtr/qrtr.c b/net/qrtr/qrtr.c
index ae5ac17..7b670a9 100644 (file)
--- a/net/qrtr/qrtr.c
+++ b/net/qrtr/qrtr.c
@@ -621,6 +621,10 @@ 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 {