[Bug 214419] ipfw coredump when try to add rule with table of IPv6 addresses

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=214419

            Bug ID: 214419
           Summary: ipfw coredump when try to add rule with table of IPv6
                    addresses
           Product: Base System
           Version: 11.0-STABLE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: bin
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: erohin.konstantin.88 at yandex.ru
                CC: freebsd-amd64 at FreeBSD.org
                CC: freebsd-amd64 at FreeBSD.org

Created attachment 176891
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=176891&action=edit
steps, logs, backtrace

Trying to add rule into ipfw with table of IPv6 addresses produces coredump.
But if I add single rule for IPv6 address ipfw acts normal.
Machine has IPv6 address on interface? but it does not matter. Without IPv6 on
any interface I got the same coredump.


How to reproduce:
     kldload ipfw
     ipfw table 1 create
     ipfw table 1 add 2a03:2480::/32
     ipfw add allow ip6 from 'table(1)' to me6 keep-state

Expected result:
     00XXX allow ip6 from table(1) to me6 keep-state

Actual result:
     Segmentation fault (core dumped)

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