From: David Howells <dhowells@redhat.com>
Date: Thu, 30 Jun 2016 10:34:30 +0000 (+0100)
Subject: rxrpc: Check the source of a packet to a client conn
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=689f4c646d6a8f0730eec11e06e5909de0b5d5d2;p=linux-beck.git

rxrpc: Check the source of a packet to a client conn

When looking up a client connection to which to route a packet, we need to
check that the packet came from the correct source so that a peer can't try
to muck around with another peer's connection.

Signed-off-by: David Howells <dhowells@redhat.com>
---

diff --git a/net/rxrpc/conn_object.c b/net/rxrpc/conn_object.c
index c86a3cff7585..2c2456ff2853 100644
--- a/net/rxrpc/conn_object.c
+++ b/net/rxrpc/conn_object.c
@@ -508,7 +508,9 @@ struct rxrpc_connection *rxrpc_find_connection(struct rxrpc_local *local,
 		}
 	} else {
 		conn = idr_find(&rxrpc_client_conn_ids, cid >> RXRPC_CIDSHIFT);
-		if (conn && conn->proto.epoch == epoch)
+		if (conn &&
+		    conn->proto.epoch == epoch &&
+		    conn->params.peer == peer)
 			goto found;
 	}