I'm seeing a Kernel Panic (in ctl_enqueuedata call).
Yet:
The ctl_ref looks OK, no ENOTCONN error.
The len looks OK, no EMSGSIZE error.
flags is set to 0.
And data is pointing to a local struct with no indirection within it.
And I didn't get an EINVAL error.
------------
* Does the data need to be copyout before calling ctl_enqueuedata?
* The Kern_control does not have a ctl_write (or equivalent) callback.
Does it need to have one to make this work?
* ctl_sendsize and ctl_recvsize (or equivalents) sizes are set to 0
(default values) but since the len is ok, I don't think the error is
coming from this.
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