diff options
authorHerbert Xu <herbert@gondor.apana.org.au>2005-04-19 22:48:59 -0700
committerDavid S. Miller <davem@davemloft.net>2005-04-19 22:48:59 -0700
commit4d78b6c78ae6d87e4c1c8072f42efa716f04afb9 (patch)
parentc7f905f0f6d49ed8c1aa4566c31f0383a0ba0c9d (diff)
[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>
1 files changed, 2 insertions, 0 deletions
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 6baddfbedca3..8a213238f287 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -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;

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