Recently, Somebody Somewhere wrote these words
> Hi JPS,
>
> >When I last had this problem (kernel panic), everything that I
> >thought might be useful scrolled past the console too quickly
> >to reliably see, and when I wrote in what was left, I was told
> >it was insufficient.
> Hear, hear.
> >Running on the "real box", I see more/textual data from the
> >panic, but I'm not sure if that is sufficiently useful, either
> >- and I don't want to waste anyone's time (and be more annoying
> >than I've so far managed) with more useless data. Or is there
> >some way to capture the data, if the panic happens before
> >logging to disk works, short of redirecting
> the
> >console to a serial port and capturing it from another box?
> I'd like to know that as well - otherwise, it seems I could
> simply cut'n'paste from your earlier mail ;-). Some registers
> may be different, but the error is essentially the same.
>
> Next question:
>
> How do I find the grsecurity patch for kernel 2.6.14.3? I have a
> strong suspicion that 2.6.14.6 might be the real problem.
>
I have both patches on disk. Mail me off list if you want them. I
never tried 2.6.14.6.
What I really wanted to see was
Kernel Panic!! <Error> or
Error
Kernel Panic!!
If you don't get that, the kernel is borked and you don't have to
think. I presume init=/bin/bash has been tried, so it doesn't even
get that far? That's pretty fundemental.
As for capturing them, surely you could do it on either box by
booting in with another system and making /dev/stdout or /dev/tty1
a file, or a serial port or some such?
There is/was a 'pause' feature used in Dos at these moments to
sort what was borked. The pause button remains on the keyboard,
needing Ctrl as well in some implementations.
Then
dd if=/dev/ttySx of=big_file bs=1 count=10000 grabs the first
10k :-D.
This is an idea, not a tested trick btw.
--
With best Regards,
Declan Moriarty.
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