Patch "tipc: ignore requests when the connection state is not CONNECTED" has been added to the 4.9-stable tree

This is a note to let you know that I've just added the patch titled

tipc: ignore requests when the connection state is not CONNECTED

to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
tipc-ignore-requests-when-the-connection-state-is-not-connected.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Parthasarathy Bhuvaragan <[email protected]>
Date: Tue, 24 Jan 2017 13:00:47 +0100
Subject: tipc: ignore requests when the connection state is not CONNECTED

From: Parthasarathy Bhuvaragan <[email protected]>

[ Upstream commit 4c887aa65d38633885010277f3482400681be719 ]

In tipc_conn_sendmsg(), we first queue the request to the outqueue followed by the connection state check. If the connection is not connected, we should not queue this message.

In this commit, we reject the messages if the connection state is not CF_CONNECTED.

---
 net/tipc/server.c |   13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

@@ -458,6 +458,11 @@ int tipc_conn_sendmsg(struct tipc_server
 	if (!con)
 		return -EINVAL;
 
+	if (!test_bit(CF_CONNECTED, &con->flags)) {
+		conn_put(con);
+		return 0;
+	}
+
 	e = tipc_alloc_entry(data, len);
 	if (!e) {
 		conn_put(con);

@@ -471,12 +476,8 @@ int tipc_conn_sendmsg(struct tipc_server
 	list_add_tail(&e->list, &con->outqueue);
 	spin_unlock_bh(&con->outqueue_lock);
 
-	if (test_bit(CF_CONNECTED, &con->flags)) {
-		if (!queue_work(s->send_wq, &con->swork))
-			conn_put(con);
-	} else {
+	if (!queue_work(s->send_wq, &con->swork))
 		conn_put(con);
-	}
 	return 0;
 }
 

@@ -500,7 +501,7 @@ static void tipc_send_to_sock(struct tip
 	int ret;
 
 	spin_lock_bh(&con->outqueue_lock);
-	while (1) {
+	while (test_bit(CF_CONNECTED, &con->flags)) {
 		e = list_entry(con->outqueue.next, struct outqueue_entry,
 			       list);
 		if ((struct list_head *) e == &con->outqueue)

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/tipc-fix-connection-refcount-error.patch queue-4.9/tipc-fix-nametbl_lock-soft-lockup-at-node-link-events.patch queue-4.9/tipc-ignore-requests-when-the-connection-state-is-not-connected.patch queue-4.9/tipc-add-subscription-refcount-to-avoid-invalid-delete.patch