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authorDenis Kirjanov <kda@linux-powerpc.org>2014-02-13 08:58:56 +0400
committerDavid S. Miller <davem@davemloft.net>2014-02-13 18:35:56 -0500
commitd4f2fa6ad61ec1db713569a179183df4d0fc6ae7 (patch)
treebeb6710f7ffb43a00ba26da9e02b3f4feab9532a /net/ipv4/ip_forward.c
parent2045ceaed4d54e6e698874d008be727ee5b2a01c (diff)
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: Denis Kirjanov <kda@linux-powerpc.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ip_forward.c')
-rw-r--r--net/ipv4/ip_forward.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/net/ipv4/ip_forward.c b/net/ipv4/ip_forward.c
index e9f1217a8afd..d9d929042a89 100644
--- a/net/ipv4/ip_forward.c
+++ b/net/ipv4/ip_forward.c
@@ -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);
/*

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