On Wed, Sep 12, 2018 at 11:07:31PM +0900, Taehee Yoo wrote: > __nf_nat_mangle_tcp_packet() and nf_nat_mangle_udp_packet() call > mangle_contents(). and __nf_nat_mangle_tcp_packet() > and mangle_contents() call skb_is_nonlinear(). so that > skb_is_nonlinear() in __nf_nat_mangle_tcp_packet() is unnecessary. Applied, thanks.