Hard crash on 6.x -- reproducible, multiple people affected

Bill Moran wmoran at collaborativefusion.com
Mon Apr 10 10:55:25 UTC 2006

Peter Thoenen <eol1 at yahoo.com> wrote:

> --- Kris Kennaway <kris at obsecurity.org> wrote:
> > On Sun, Apr 02, 2006 at 04:09:30PM -0400, Anish Mistry wrote:
> > > > It's not clear what he means by "hard crash", but he also says
> > > > power off", which is the part that is most confusing to me.
> > > Hmmm...I missed that part.  Yeah, if it powers off then I'm not
> > sure what you can do to debug it.
> By hard crash I mean the box just instantly powers off.  No shutdown
> syncs, no error, panic's, or dump generated, nothing logged in syslog,
> and I have a serial cable hooked up to another another dumb terminal
> hoping to maybe catch a panic or some debug message dumped out over
> serial as it goes down but nothing there also.  It just stops. 
> Also note that this didn't happen on 5.x.  And when not running those
> particular ports the box stays up just fine for weeks on end.  Just
> tried again with 6.1 PRERELEASE and same issue.
> > About all I can think of is to try to reproduce the problem with
> > enough logging enabled (e.g. running the binary under ktrace), with
> > sync-mounted filesystem, and hope that the last few entries give the
> > software developer enough of a clue what the process was doing at the
> > time of shutdown (the operation itself probably will not be logged)
> > that he can focus the investigation further.
> Want to walk me through this and will do.  As I said, reproducible.

You could also install the setup under Bochs and enable full logging.

Bill Moran
Potential Technologies

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