linux-kernel - Re: [3.4-rc1 crash]: NULL pointer deref in fs/sysfs/group.c:create

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Message-ID: <20120403060252.GA27084@gmail.com>
Date:	Tue, 3 Apr 2012 08:02:52 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Bruno Prémont <bonbons@...ux-vserver.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	linux-kernel@...r.kernel.org, Greg KH <gregkh@...uxfoundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [3.4-rc1 crash]: NULL pointer deref in
 fs/sysfs/group.c:create_files -- sysctl related?


* Peter Zijlstra <peterz@...radead.org> wrote:

> On Mon, 2012-04-02 at 23:24 +0200, Peter Zijlstra wrote:
> > On Mon, 2012-04-02 at 21:34 +0200, Bruno Prémont wrote:
> > > > >> [    0.996198] Pid: 1, comm: swapper/0 Not tainted 3.4.0-rc1-x86_64 #3 HP ProLiant DL360 G4
> > 
> > Is this a netburst based space heater?
> 
> In particular, does: https://lkml.org/lkml/2012/3/27/182 , sort it?
> 
> Ingo, could you pick that one up and route it Linus wards?

Will do - but the underlying generic bug should be fixed as 
well: we must not crash just because some attributes are missing 
in a rarely used sub-driver ...

We should WARN_ON(), etc. - but not crash.

Thanks,

	Ingo
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