https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=292193

            Bug ID: 292193
           Summary: ipfw kernel panic on interface creation/removal
           Product: Base System
           Version: 16.0-CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: kern
          Assignee: [email protected]
          Reporter: [email protected]

Created attachment 266835
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=266835&action=edit
Patch to resolve reported issue.

Commit 349fcf079ca32d5c93e45366d2b27638747affeb changed ipfw_kifhandler in
sys/netpfil/ipfw_fw_iface.c to handle more options. Unfortunately the
processing of the 'arg' argument is mishandled, it's a (void *)mapped value not
a pointer to the value. 

Triggered by having ipfw enabled and creating or removing an interface.

Attached patch resolves the issue.

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