This patch moves the security_netlink_send() LSM hook after the user copy, so
that LSM modules can safely examine skb payload content.  For SELinux, we need
to look at the Netlink message type.

Cc: David S. Miller <davem@redhat.com>
Signed-off-by: James Morris <jmorris@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>