kern/42030: panic when zebra works on detaching tun interface

[Ted Mittelstaedt]

I am not saying a kernel flaw should be left in place.  I am saying
that if someone fixes the FreeBSD kernel that it will not help you
to get Zebra to do what you want it to do.  Presumably you filed the
bug because you have a problem that you would like fixed, and
presumably the problem is that you want to be able to detach the
tun interface and have Zebra make an adjustment without a panic.
You will not get this to happen by beating the FreeBSD kernel
people over the head, because even if someone fixes the FreeBSD kernel
problem, the Zebra application will still be broken.

I think you are frustrated because you can't get the Zebra/Quagga
people to fix the bug in Zebra.  I am sorry and I understand your
frustration,
being a Quagga user myself.  But, I posted followup on this bug
because the FreeBSD kernel people have limited time to fix bugs, and
must prioritize them and fix the FreeBSD kernel bugs that affect the
most people first.  The fact that the Linux kernel also panics when
Zebra does this is a good indication that the application program has
a serious bug in it.  If no other application programs on FreeBSD
trigger this particular bug in the kernel, then the FreeBSD kernel
developers are not likely to take this up, without input from
the Zebra development team saying what they are doing wrong that is
causing the panic.  As I said before, your best bet on getting
this problem resolved is to start with the Zebra/Quagga development
team.

Ted