[IPSEC]: COW skb header in UDP decap
The following patch just makes the header part of the skb writeable. This is needed since we modify the IP headers just a few lines below. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -955,6 +955,8 @@ static int udp_encap_rcv(struct sock * sk, struct sk_buff *skb)
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* header and optional ESP marker bytes) and then modify the
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* protocol to ESP, and then call into the transform receiver.
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*/
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if (skb_cloned(skb) && pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
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return 0;
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/* Now we can update and verify the packet length... */
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iph = skb->nh.iph;
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