How to repeat symptoms:
boot -c
<make some changes, quit and come up normally>
kget
Watch your system panic when kget does a:
sysctlbyname("machdep.uc_devlist", buf, &len, NULL, NULL);
where len has been properly fetched in a previous syctlbyname()
call (1526 bytes, in my test case) and buf allocated appropriately.
System will panic with a supervisor read, page not present.
In fact, I've just proven the hard way that trying to read
machdep.uc_devlist in any way, including sysctl -a, does the same
thing. Wurgh. :)
- Jordan
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