netdev - Re: [PATCH] ipv6: fix null pointer dereference in __ip6addrlbl

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Message-Id: <20130904.141301.41040920905693536.davem@davemloft.net>
Date:	Wed, 04 Sep 2013 14:13:01 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	hannes@...essinduktion.org
Cc:	michele@...syn.org, netdev@...r.kernel.org,
	yoshfuji@...ux-ipv6.org, sasha.levin@...cle.com
Subject: Re: [PATCH] ipv6: fix null pointer dereference in __ip6addrlbl_add

From: Hannes Frederic Sowa <hannes@...essinduktion.org>
Date: Tue, 3 Sep 2013 02:13:31 +0200

> Hi!
> 
> On Mon, Sep 02, 2013 at 10:31:28PM +0100, Michele Baldessari wrote:
>> with the latest linux master git tree from Linus
>> (248d296d6d9df384996c2ed95676b367d876d48c - 2 Sep) I can reproduceably oops 
>> the kernel with the following commands:
>> ip addrlabel flush
>> ip addrlabel add prefix ::1/128              label 0
>> ip addrlabel add prefix ::/0                 label 1
> 
> Thanks for the report! This patch should fix this issue:
> 
> [PATCH] ipv6: fix null pointer dereference in __ip6addrlbl_add
> 
> Commit b67bfe0d42cac56c512dd5da4b1b347a23f4b70a ("hlist: drop
> the node parameter from iterators") changed the behavior of
> hlist_for_each_entry_safe to leave the p argument NULL.
> 
> Fix this up by tracking the last argument.
> 
> Reported-by: Michele Baldessari <michele@...syn.org>
> Cc: Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>
> Cc: Sasha Levin <sasha.levin@...cle.com>
> Signed-off-by: Hannes Frederic Sowa <hannes@...essinduktion.org>

Applied.
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