>> 	sys/netinet/in_gre.c:gre_mobile_input() assumes that GRE header
>> 	and IP header are continuous on a single mbuf, but the assumption
>> 	does not hold for ESP case i guess.  i guess we need to fix
>> 	gre_mobile_input() to perform m_pullup().
>
>Oh, but hang on: I'm not using mobile encapsulation. Is it really
>gre_input2 that's making this assumption?

	oops, i was wrong about where.
	gre_input2() makes assumption that m->m_len =< sizeof(struct greip)
	it needs to be fixed.

itojun