Fatal Kernel Trap 12 after changing firewall rules

  • Dear Community,

    I see that Trap 12 has been discussed here before, but only in the ocntext of VLANs from what I can tell.

    I have pfSense 2.0-RC1 (i386) built on Tue Apr 19 23:03:17 EDT 2011 running in a HyperV virtual machine with two legacy (de0/de1) adapters.
    I changed a firewall rule on the LAN interface today from PASS to REJECT and hit apply, and the VM got a Kernel Trap 12.
    I though maybe something went awry, so I reset the machine, and from then on it would trap every time on bootup at the "Setting up gateway monitors" step. It did that three times. I unrolled the VHD snapshot and everything was well again.
    It may be inside the de ethernet driver, since "current process" was irq11: de0 de1". I didn't backtrace at the prompt.
    Does anyone have any idea? Again, I'm not using VLANs or the em driver.

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