linux-kernel - Re: edac: NULL deref when handling sysfs write

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Message-ID: <20130222143852.GF25473@pd.tnic>
Date:	Fri, 22 Feb 2013 15:38:52 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	Sasha Levin <sasha.levin@...cle.com>
Cc:	dougthompson@...ssion.com, linux-edac@...r.kernel.org,
	Dave Jones <davej@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: edac: NULL deref when handling sysfs write

On Fri, Feb 22, 2013 at 09:29:04AM -0500, Sasha Levin wrote:
> Hi all,
> 
> While fuzzing with trinity inside a KVM tools guest running latest -next kernel
> I've stumbled on the following spew:
> 
> 
> [ 2060.023557] Invalid bank value!

You're injecting into an invalid bank.

> [ 2060.029076] [Hardware Error]: MC0 Error:

This looks like a second write to the same sysfs file which passes the
first.

For now, do

rmmod mce_amd_inj

before running trinity.

This module needs to get converted to debugfs (I have patches) anyway.

Thanks.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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