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Commit d4f2fa6a authored by Denis Kirjanov's avatar Denis Kirjanov Committed by David S. Miller
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ipv4: ip_forward: perform skb->pkt_type check at the beginning 



Packets which have L2 address different from ours should be
already filtered before entering into ip_forward().

Perform that check at the beginning to avoid processing such packets.

Signed-off-by: default avatarDenis Kirjanov <kda@linux-powerpc.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 2045ceae

net/ipv4/ip_forward.c

+4 −3
Original line number Diff line number Diff line
@@ -59,6 +59,10 @@ int ip_forward(struct sk_buff *skb) 
	struct rtable *rt;	/* Route we use */

	struct ip_options *opt	= &(IPCB(skb)->opt);



	/* that should never happen */

	if (skb->pkt_type != PACKET_HOST)

		goto drop;



	if (skb_warn_if_lro(skb))

		goto drop;
@@ -68,9 +72,6 @@ int ip_forward(struct sk_buff *skb) 
	if (IPCB(skb)->opt.router_alert && ip_call_ra_chain(skb))

		return NET_RX_SUCCESS;



	if (skb->pkt_type != PACKET_HOST)

		goto drop;



	skb_forward_csum(skb);



	/*