[PATCH 4.17 195/324] net: qrtr: Broadcast messages only from control port

Greg Kroah-Hartman
2018-08-23T09:00:00Z

From: Arun Kumar Neelakantam <aneela@codeaurora.org>

[ 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>
---
net/qrtr/qrtr.c | 4 ++++
1 file changed, 4 insertions(+)

--- a/net/qrtr/qrtr.c
+++ b/net/qrtr/qrtr.c
@@ -764,6 +764,10 @@ static int qrtr_sendmsg(struct socket *s
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 {