[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 Signed-off-by: David S. Miller --- commit 4d78b6c78ae6d87e4c1c8072f42efa716f04afb9 tree e04f156e8d74c28b925bf53e62d3e4b424a6ffb7 parent c7f905f0f6d49ed8c1aa4566c31f0383a0ba0c9d author Herbert Xu Tue, 19 Apr 2005 22:48:59 -0700 committer David S. Miller Tue, 19 Apr 2005 22:48:59 -0700 net/ipv4/udp.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -955,6 +955,8 @@ static int udp_encap_rcv(struct sock * s * 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;