From KAME freebsd4/sys/netinet/ip_input.c rev 1.42:
authorJeffrey Hsu <hsu@dragonflybsd.org>
Sat, 16 Oct 2004 23:20:00 +0000 (23:20 +0000)
committerJeffrey Hsu <hsu@dragonflybsd.org>
Sat, 16 Oct 2004 23:20:00 +0000 (23:20 +0000)
commit52560a13d667762996823135b94a2da794a6eb92
tree8295432899122a36b21d3f1e47d25c1118b29f1e
parent661ed2bb41fb0f2f81f8ff02105e523ff7849939
From KAME freebsd4/sys/netinet/ip_input.c rev 1.42:

  Set m->m_pkthdr.len for the saved mbuf (mcopy) to make
  ipsec4_getpolicybyaddr() successful.

Same as FreeBSD rev 1.273 fix to FreeBSD PR kern/42727.
sys/netinet/ip_input.c