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bridge: Pull ip header into skb->data before looking into ip header. 

If lower layer driver leaves the ip header in the skb fragment, it needs to
be first pulled into skb->data before inspecting ip header length or ip version
number.

Signed-off-by: Sarveshwar Bandi <sarveshwar.bandi@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sarveshwar Bandi 2012-10-10 01:15:01 +00:00 committed by David S. Miller
parent 435f08a721
commit 6caab7b054
1 changed files with 3 additions and 0 deletions
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3
net/bridge/br_netfilter.c
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@ -265,6 +265,9 @@ static int br_parse_ip_options(struct sk_buff *skb)
struct net_device *dev = skb->dev; struct net_device *dev = skb->dev;
u32 len; u32 len;
if (!pskb_may_pull(skb, sizeof(struct iphdr)))
goto inhdr_error;
iph = ip_hdr(skb); iph = ip_hdr(skb);
opt = &(IPCB(skb)->opt); opt = &(IPCB(skb)->opt);