tipc: initialize 'validated' field of received packets

The tipc_msg_validate() function leaves a boolean flag 'validated' in
the validated buffer's control block, to avoid performing this action
more than once. However, at reception of new packets, the position of
this field may already have been set by lower layer protocols, so
that the packet is erroneously perceived as already validated by TIPC.

We fix this by initializing the said field to 'false' before performing
the initial validation.

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/tipc/node.c b/net/tipc/node.c
index 324a1f91b394ec95f0e2bf2bda7d5f27aea359a7..3a5be1d7e572a0eb4a5ea0e90bcfaff5ee155791 100644 (file)
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -1807,6 +1807,7 @@ void tipc_rcv(struct net *net, struct sk_buff *skb, struct tipc_bearer *b)
        __skb_queue_head_init(&xmitq);
 
        /* Ensure message is well-formed before touching the header */
+       TIPC_SKB_CB(skb)->validated = false;
        if (unlikely(!tipc_msg_validate(&skb)))
                goto discard;
        hdr = buf_msg(skb);