inet: Call skb_orphan before tproxy activates

inet: Call skb_orphan before tproxy activates

[ Upstream commit 71f9dacd2e4d233029e9e956ca3f79531f411827 ]

As transparent proxying looks up the socket early and assigns
it to the skb for later processing, we must drop any existing
socket ownership prior to that in order to distinguish between
the case where tproxy is active and where it is not.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>