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

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Message-ID: <19f34abd0811211726h143c83f6obdfcb97e71fa595f@mail.gmail.com>
Date:	Sat, 22 Nov 2008 02:26:52 +0100
From:	"Vegard Nossum" <vegard.nossum@...il.com>
To:	"Brian Phelps" <lm317t@...il.com>,
	"Mauro Carvalho Chehab" <mchehab@...radead.org>
Cc:	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

[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.
>
>
> Vegard
>
> --
> "The animistic metaphor of the bug that maliciously sneaked in while
> the programmer was not looking is intellectually dishonest as it
> disguises that the error is the programmer's own creation."
>        -- E. W. Dijkstra, EWD1036
>
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