kgzip(1) is broken

[Ian Lepore]

On Tue, 2013-01-15 at 13:27 -0800, dteske at freebsd.org wrote:
> Hello,
> 
> I have been sad of-late because kgzip(1) no longer produces a usable kernel.
> 
> All versions of 9.x suffer this.
> 
> And somewhere between 8.3-RELEASE-p1 and 8.3-RELEASE-p5 this recently broke in
> the 8.x series.
> 
> I haven't tried the 7 series lately, but if whatever is making the rounds gets
> MFC'd that far back, I expect the problem to percolate there too.
> 
> The symptom is that the machine reboots immediately and unexpectedly the moment
> the kernel is executed by the loader.
> 
> This is quite troubling and I am looking for someone to help find the culprit. I
> don't know where to start looking.

Here are some possible candidates from the things that were MFC'd to 8
in that timeframe.  I haven't looked at what these do, they're just
changes that affect files related to booting.

r233211
r233377
r233469
r234563

-- Ian