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| author | Patrick McHardy <kaber@trash.net> | 2007-07-09 15:33:40 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-07-10 22:19:05 -0700 |
| commit | cfbba49d80be6cf8d3872b66fc5421f119843b36 (patch) | |
| tree | 2e2a966d43b6cd80c2ae7c8d5e37ab4c8a0262ad /net/ipv6/sit.c | |
| parent | 4839c52b01ca91be1c62761e08fb3deb3881e857 (diff) | |
| download | linux-cfbba49d80be6cf8d3872b66fc5421f119843b36.tar.gz linux-cfbba49d80be6cf8d3872b66fc5421f119843b36.tar.bz2 linux-cfbba49d80be6cf8d3872b66fc5421f119843b36.zip | |
[NET]: Avoid copying writable clones in tunnel drivers
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/sit.c')
| -rw-r--r-- | net/ipv6/sit.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c index 1efa95a99f45..eb20bb690abd 100644 --- a/net/ipv6/sit.c +++ b/net/ipv6/sit.c @@ -532,7 +532,8 @@ static int ipip6_tunnel_xmit(struct sk_buff *skb, struct net_device *dev) */ max_headroom = LL_RESERVED_SPACE(tdev)+sizeof(struct iphdr); - if (skb_headroom(skb) < max_headroom || skb_cloned(skb) || skb_shared(skb)) { + if (skb_headroom(skb) < max_headroom || skb_shared(skb) || + (skb_cloned(skb) && !skb_clone_writable(skb, 0))) { struct sk_buff *new_skb = skb_realloc_headroom(skb, max_headroom); if (!new_skb) { ip_rt_put(rt); |