6.0-REL problems with ISA ed0 and ancient hardware

[Matt Emmerton]

On Sun, Mar 19, 2006 at 04:39:19PM -0500, Matt Emmerton wrote:
> On Sun, Mar 19, 2006 at 11:28:45AM -0500, Matt Emmerton wrote:
> > [ Asked on -questions on Friday; re-asking now on -stable without
> > cross-post]
> >
> > I recently upgraded a 4.11-REL machine to 6.0-REL and have run into some
> > snags.  While the installation from CD went fine, after configuring and
> > enabling my ed0 NIC, bad things start to happen.
> >
> > FWIW, this machine is an ancient (hardware circa 1991, BIOS circa 1994)
> > dual-Pentium 133 MHz machine, with EISA/PCI and onboard SCSI.
> >
> > So far I can reliably reproduce two panics, one appears to be a ed
driver
> > bug (based on reports of similar panics with different NICs, notably
nge)
> > and one is a filesystem corruption problem.
> >
> > Here's the process that I go through to reliably reproduce both
problems.
> > 1) Boot machine in multi-user mode
> > 2) After ifconfig ed0, machine panics with a trap 12 in ithread_loop.
> > 3) In debugger, reset (or panic to get vmcore)

The panic doesn't happen during the ifconfig -- it happens shortly after
"hostname" is run.

The details of this panic are in the attached typescript output.

>From what I can see, it looks like the stack is smashed hence ih is bogus,
so we fail on the deref.

Regards,
--
Matt Emmerton
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