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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>
This commit is contained in:
Jon Maloy 2019-07-17 23:43:44 +02:00 committed by David S. Miller
parent 7b379472bc
commit 866e5fd8a7
1 changed files with 1 additions and 0 deletions
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1
net/tipc/node.c
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@ -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);