netdev - Re: [RFC PATCH] net: cgroup: null ptr dereference in netprio cgroup during init

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Date:	Wed, 18 Jul 2012 08:53:03 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	nhorman@...driver.com
Cc:	john.r.fastabend@...el.com, gaofeng@...fujitsu.com,
	mark.d.rustad@...el.com, netdev@...r.kernel.org,
	eric.dumazet@...il.com
Subject: Re: [RFC PATCH] net: cgroup: null ptr dereference in netprio
 cgroup during init

From: Neil Horman <nhorman@...driver.com>
Date: Wed, 18 Jul 2012 11:25:20 -0400

> Yeah, I see what you mean.  Seems like what we need is to either:
> 1) move cgroup_init to later in the boot process.  If you're not early_init,
> then I don't see why the subsystem can't wait until later in the boot process
> (i.e. make cgroup_init a late_initcall or some such).
> 
> or
> 
> 2) Allow module based cgroups to flag themselves as needing late init after the
> rest of the kernel has booted.

These are way too complicated compared to John's currently proposed
fix for this recently introduced regression.

I want a one liner which I can prove is going to remove the crash.

All of this talk of rearranging initcall ordering for cgroup stuff
is too ambitious this late in the -rc.
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