Hi all,
I believe I'm suffering from this bug (ipfw_chk() does m_pullup() and barfs on vrrp as it shares a protocol number with CARP).
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=234207
It appears that a fix has been committed to freebsd recently (Jan 18, 2019).
I was curious to know...