netdev - [PATCH 1/2] net: qrtr: Broadcast messages only from control port

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Message-Id: <1530713973-26696-2-git-send-email-aneela@codeaurora.org>
Date:   Wed,  4 Jul 2018 19:49:32 +0530
From:   Arun Kumar Neelakantam <aneela@...eaurora.org>
To:     davem@...emloft.net, bjorn.andersson@...aro.org
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org,
        Arun Kumar Neelakantam <aneela@...eaurora.org>,
        Florian Westphal <fw@...len.de>,
        Nicolas Dechesne <nicolas.dechesne@...aro.org>,
        Denys Vlasenko <dvlasenk@...hat.com>
Subject: [PATCH 1/2] 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 <aneela@...eaurora.org>
---
 net/qrtr/qrtr.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/net/qrtr/qrtr.c b/net/qrtr/qrtr.c
index 2aa07b5..7ffc9a3 100644
--- 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 {
-- 
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