linux-kernel - Re: NULL pointer dereference in mainline and next

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Message-ID: <20111128143558.GC2911@mudshark.cambridge.arm.com>
Date:	Mon, 28 Nov 2011 14:35:58 +0000
From:	Will Deacon <will.deacon@....com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	"mmaruseac@...acom.com" <mmaruseac@...acom.com>,
	"davem@...emloft.net" <davem@...emloft.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: NULL pointer dereference in mainline and next

On Mon, Nov 28, 2011 at 02:33:24PM +0000, Eric Dumazet wrote:
> Le lundi 28 novembre 2011 à 14:18 +0000, Will Deacon a écrit :
> > Hello,
> > 
> > Commit f04565dd ("dev: use name hash for dev_seq_ops") requires a struct
> > dev_iter_state to be allocated for the seq_file->private member, as that is
> > used to implement the name hash.
> > 
> > Unfortunately, the dev_mcast code wasn't updated and so only allocates space
> > for a seq_net_private, leading to the following NULL dereference (removed
> > static inline annotations to get sane backtrace):

[...]

> Anton Blanchard already provided a fix for this problem.
> 
> http://patchwork.ozlabs.org/patch/127931/

Ok, great - as long as it gets fixed!

Will
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