[Bug 217402] Changing LAG settings with iohyve VMs running causes kernel panic

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=217402

            Bug ID: 217402
           Summary: Changing LAG settings with iohyve VMs running causes
                    kernel panic
           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: finlon at gmail.com

Created attachment 180345
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=180345&action=edit
info and textdump files

Creating/Modifying/Deleting LAG interface while iohyve VM is running causes
kernel panic.

I've been running two ioyhve VMs for a while, and I just got a new Intel dual
gig port pci express card to set up a LAG.

As soon as I created a LAG the system went in to a crash/dump/reboot loop.

It appears that if you try to configure or even just create and not use a LAG
interface, and then start a Iohyve VM, the system immediately crashes and
reboots. If a LAG is configured, and the Iohyve VM is set to auto boot, the
system goes in to a dump/reboot loop.

I ended up reinstalling, and loading a backup config. I can either run with a
LAG set up and no iohyve VM's or run iohyve VMs and no LAG.

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