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[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>
hifive-unleashed-5.1
Herbert Xu 2005-04-19 22:48:59 -07:00 committed by David S. Miller
parent c7f905f0f6
commit 4d78b6c78a
1 changed files with 2 additions and 0 deletions
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net/ipv4/udp.c
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@ -955,6 +955,8 @@ static int udp_encap_rcv(struct sock * sk, struct sk_buff *skb)
* header and optional ESP marker bytes) and then modify the
* protocol to ESP, and then call into the transform receiver.
*/
if (skb_cloned(skb) && pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
return 0;
/* Now we can update and verify the packet length... */
iph = skb->nh.iph;