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Date:      Wed, 18 Feb 1998 03:15:14 +0100
From:      Eivind Eklund <eivind@yes.no>
To:        Mike Smith <mike@smith.net.au>
Cc:        hackers@FreeBSD.ORG
Subject:   Re: ed overwrite clue?
Message-ID:  <19980218031514.22415@follo.net>
In-Reply-To: <199802180017.QAA03678@dingo.cdrom.com>; from Mike Smith on Tue, Feb 17, 1998 at 04:17:47PM -0800
References:  <19980218002852.55010@follo.net> <199802180017.QAA03678@dingo.cdrom.com>

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On Tue, Feb 17, 1998 at 04:17:47PM -0800, Mike Smith wrote:
> > > > I'm about to start trigging some crashdumps on purpose now, so I can
> > > > get a good look at how a dump for an OK case is.
> > > 
> > > Do you have any custom code in the kernel?
> > 
> > Yes.  And the system won't boot without it, so ripping it out is
> > really not an option.  I could try to revert as much as possible, but
> > it really doesn't look like any of the code that is revertible is at
> > fault; almost none of it has been excersised yet.
> 
> The only reason I asked was inre: stack overflow.

Yeah, I understand.  I can't see anything that could have triggered that;
none of the other code even being run, AFAIK.

I've also just added stack guards - they're not triggered...

> > And the exact same kernel run fine with another NE2000-clone (on
> > another port and IRQ, though, but there are no IRQ-conflicts).
> 
> 8(  Try matching the two, just in case this is a real heisenbug...

That's going to be difficult.  I'd introduce other differences if I was to
get the other cards to this address - we're talking PnP-cards.

Eivind.

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