Hello,

it looks like there is a bug in kldunload that can
easily crash the whole OS. It's easy to reproduce it:

1. kldload snd -- loads all sound drivers and probes
hardware;

2. kldunload snd -- boom, kernel panics.

Modules cannot be unloaded separately. Of course
that's stupid to kldload all of them together, but
that shouldn't crash OS on unload, right?

I have no sound related stuff in my kernel, and of
course I didn't load any _snd.ko modules prior to
kldload snd.

FreeBSD 4.7-RC1 i386

Rhett


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