linux-kernel - Re: 2.6.18 Nasty Lockup

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 27 Sep 2006 08:02:45 +1000
From:	Greg Schafer <gschafer@....com.au>
To:	john stultz <johnstul@...ibm.com>
Cc:	linux-kernel@...r.kernel.org,
	James Puthukattukaran <James.Puthukattukaran@....COM>,
	Michael Obster <lkm@...ter.org>,
	S.Ça??lar Onur <caglar@...dus.org.tr>
Subject: Re: 2.6.18 Nasty Lockup

On Tue, Sep 26, 2006 at 01:15:51PM -0700, john stultz wrote:
> On Tue, 2006-09-26 at 22:36 +1000, Greg Schafer wrote:
> > This is a _hard_ lockup. No oops, no magic sysrq, no nuthin, just a
> > completely dead machine with only option the reset button. Usually happens
> > within a couple of minutes of desktop use but is 100% reproducible. Problem
> > is still there in a fresh checkout of current Linus git tree (post 2.6.18).
> > 
> > Dual Athlon-MP 2200's on a Tyan S2466 Tiger MPX. Config attached.
> > 
> > I used git-bisect and arrived at the apparent culprit below. Anything else I
> > should do to gather more info?
> 
> Quick test: Does enabling CONFIG_ACPI change the behavior?

Yes. It doesn't lockup now, at least it hasn't yet. Should I always
configure with CONFIG_ACPI? I've usually avoided it.


On Tue, Sep 26, 2006 at 11:18:02AM -0700, john stultz wrote:
> Thanks for narrowing this down. Could you send me full dmesg output?

Sure, attached (non CONFIG_ACPI case).


On Tue, Sep 26, 2006 at 01:20:54PM -0400, James Puthukattukaran wrote:
> Did you try asserting an NMI via "nmi_watchdog" kernel boot argument?

I gave it a try on your advice (added nmi_watchdog=1 to boot args). No dice
I'm afraid (no oops data). But I did notice in the dmesg output something
possibly strange:

Testing NMI watchdog ... CPU#0: NMI appears to be stuck (0->0)!


On Tue, Sep 26, 2006 at 03:56:46PM +0200, Michael Obster wrote:
> what do you mean with desktop use? X11-System? Then please add also your
> used grafic card and the X11 driver. I see this behaviour with lots of
> binary only driver like from NVIDIA or ATI (perhaps they have problems
> with the new 2.6.18 kernel).

No binary-only drivers here. Matrox card. In fact, the lockup sometimes
happens before X is even loaded (I suspect ntpdate in my bootscripts).


Regards
Greg

Download attachment "dmesg.out.gz" of type "application/x-gunzip" (3579 bytes)