linux-kernel - Re: kernel BUG at mm/slab.c:601

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Date:	Mon, 24 Nov 2008 08:39:01 -0200
From:	Mauro Carvalho Chehab <mchehab@...radead.org>
To:	"Vegard Nossum" <vegard.nossum@...il.com>
Cc:	"Brian Phelps" <lm317t@...il.com>, linux-kernel@...r.kernel.org,
	"Al Viro" <viro@...iv.linux.org.uk>,
	"Mikael Pettersson" <mikpe@...uu.se>,
	"Alexander Shaduri" <ashaduri@...il.com>,
	"Alexey Dobriyan" <adobriyan@...il.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: kernel BUG at mm/slab.c:601

On Sat, 22 Nov 2008 02:26:52 +0100
"Vegard Nossum" <vegard.nossum@...il.com> wrote:

> [Resend with (I hope) working e-mail address for Mauro]
> 
> On Sat, Nov 22, 2008 at 2:25 AM, Vegard Nossum <vegard.nossum@...il.com> wrote:
> > On Sat, Nov 22, 2008 at 2:10 AM, Vegard Nossum <vegard.nossum@...il.com> wrote:
> >>> [  527.562373]  ffffffff8043b157 0000000000200200 ffffffffa02810d4
> >>> ffff88001e13c600
> >>
> >> LIST_POISON2 on the stack:
> >>
> >> include/linux/poison.h:#define LIST_POISON2  ((void *) 0x00200200)
> >
> > So looking at bttv source code, I wonder what the codes like these are
> > trying to do:
> >
> >                        if (set->top->vb.queue.next)
> >                                list_del(&set->top->vb.queue);
> >
> > Code is ancient, I'll ask Mauro.

Your patch seemed correct. I'll test it later. Better alto to wait for Brian
updates, since I never saw this bug on my environment.

Cheers,
Mauro
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