linux-kernel - Re: [uml-devel] Fwd: Re: UML kernel crash of v2.6.36-rcX kernel

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Message-ID: <AANLkTikDc+Gv=L-38cTUzZHWSib5tabvxAjR7GLAMU9c@mail.gmail.com>
Date:	Mon, 18 Oct 2010 11:16:10 +0200
From:	richard -rw- weinberger <richard.weinberger@...il.com>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	Toralf Förster <toralf.foerster@....de>,
	Christoph Hellwig <hch@....de>,
	Richard Weinberger <richard@....at>,
	linux-kernel@...r.kernel.org,
	user-mode-linux-devel@...ts.sourceforge.net,
	Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [uml-devel] Fwd: Re: UML kernel crash of v2.6.36-rcX kernel

2010/10/18 Geert Uytterhoeven <geert@...ux-m68k.org>:
> 2010/10/18 Toralf Förster <toralf.foerster@....de>:
>> Well, in addition to my last mail the following patch isn't a fix, but it
>> might point to the culprit.
>> If I apply this patch against latest tree, then the crash doesn't occur :
>>
>> diff --git a/include/linux/statfs.h b/include/linux/statfs.h
>> index 0166d32..e336e70 100644
>> --- a/include/linux/statfs.h
>> +++ b/include/linux/statfs.h
>> @@ -15,8 +15,8 @@ struct kstatfs {
>>        __kernel_fsid_t f_fsid;
>>        long f_namelen;
>>        long f_frsize;
>> -   long f_flags;
>>        long f_spare[4];
>> + long f_flags;
>>  };
>
> So it probably is accessing f_spare[4] somewhere...

fs/hostfs/hostfs_user.c does so.
I'll look at this when I'm at home.

Toralf, are you using hostfs?

> Gr{oetje,eeting}s,
>
>                         Geert
>
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org
>
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                 -- Linus Torvalds
> --
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-- 
Thanks,
//richard
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