linux-kernel - Re: tty-related oops in latest kernel(s)?

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Message-ID: <Pine.LNX.4.64.0705300854570.11432@jalava.cc.jyu.fi>
Date:	Wed, 30 May 2007 09:00:34 +0300 (EEST)
From:	Tero Roponen <teanropo@....fi>
To:	Pekka Enberg <penberg@...helsinki.fi>
cc:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Andy Whitcroft <apw@...dowen.org>
Subject: Re: tty-related oops in latest kernel(s)?

On Wed, 30 May 2007, Pekka Enberg wrote:

> On 5/30/07, Tero Roponen <teanropo@....fi> wrote:
> > Hmmm, I just found something interesting. In 2.6.21.3 the /sbin/init
> > gets corrupted when I watch the video!
> >
> > $ cp /sbin/init init.before
> > $ mplayer kiwi.flv
> > $ cp /sbin/init init.after
> >
> > The sha1sums are here:
> >
> > 52c8d643057619cbe137b8e69d4709ce3bdd832d  init.after
> > 8efc7864a5b535a9e336fa82e9d7f112f3d956c1  init.before
> >
> > It seems that something corrupts memory somewhere...
> 
> To debug this a bit further:
> 
> $ od -a -t x1 -v init.after > init.after.dump
> $ od -a -t x1 -v init.before > init.before.dump
> $ diff -u init.before.dump init.after.dump | less
> 
> -0011340  nul nul nul  e9  f0  fe  ff  ff  ff   %   < soh enq  bs   h  80
> -           00  00  00  e9  f0  fe  ff  ff  ff  25  3c  01  05  08  68  80
> +0010000    y ack nul nul   y ack nul nul   y ack nul nul   y ack nul nul
> +           79  06  00  00  79  06  00  00  79  06  00  00  79  06  00  00
> +0010020    y ack nul nul   y ack nul nul   y ack nul nul   y ack nul nul
> +           79  06  00  00  79  06  00  00  79  06  00  00  79  06  00  00
> +0011340    y ack nul nul   y ack nul nul  ff   %   < soh enq  bs   h  80
> +           79  06  00  00  79  06  00  00  ff  25  3c  01  05  08  68  80
> 
> The file at offset 0010000 - 0011348 is overwritten with the byte
> pattern 79 06 00 00.
> 
> Do you see anything in the logs or is this a silent corruption? Did
> you see this corruption with 2.6.19 or 2.6.22-rc3?

2.6.19.2 has been very stable for me.
2.6.21.3 has this silent corruption (nothing in logs)
2.6.22-rc3 oopses when watching videos.

-- 
Tero Roponen
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