[Bug 220830] STABLE/11 (11.1-RC3, with ZFS bootstrap loader r1.1) kernel (GENERIC) panic; integer divide fault, trap number 18, current process 16 (pf purge)

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=220830

            Bug ID: 220830
           Summary: STABLE/11 (11.1-RC3, with ZFS bootstrap loader r1.1)
                    kernel (GENERIC) panic; integer divide fault, trap
                    number 18, current process 16 (pf purge)
           Product: Base System
           Version: 11.0-STABLE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: egypcio at googlemail.com

Created attachment 184470
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=184470&action=edit
freebsd 11.1-rc3 (generic) with zfs boostrap loader, kernel panic. pf purge.

how to reproduce?

  1) get a FreeBSD 11.1-RC3/amd64 install ISO;
  2) install it following its defaults;
        use "Auto ZFS" for disk partitions;
  3) boot into your new FreeBSD box;
  4) as root, run "sysrc -f /boot/loader.conf pf_load=YES";
  5) reboot.

it might be the case that previous revisions are also affected. first noticed
this behavior on r320730. kernel panic reproduced in a virtual environment, and
on bare metal.

  *) changing "boot options" to enable verbose (option number 6) is a
workaround, and the machine boots without panic.

I'm building a DEBUG kernel to attach more details and info ASAP; if one can
build and reproduce it too add more data, feel free.

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