netdev - Re: [PATCH net-next 2/2] ipv6: compare sernum when walking fib for /proc/net/ipv6

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Message-Id: <20130927.173313.1429984635743435628.davem@davemloft.net>
Date:	Fri, 27 Sep 2013 17:33:13 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	hannes@...essinduktion.org
Cc:	netdev@...r.kernel.org, greearb@...delatech.com, kaber@...sh.net,
	yoshfuji@...ux-ipv6.org
Subject: Re: [PATCH net-next 2/2] ipv6: compare sernum when walking fib for
 /proc/net/ipv6_route as safety net

From: Hannes Frederic Sowa <hannes@...essinduktion.org>
Date: Sat, 21 Sep 2013 16:56:10 +0200

> This patch provides an additional safety net against NULL
> pointer dereferences while walking the fib trie for the new
> /proc/net/ipv6_route walkers. I never needed it myself and am unsure
> if it is needed at all, but the same checks where introduced in
> 2bec5a369ee79576a3eea2c23863325089785a2c ("ipv6: fib: fix crash when
> changing large fib while dumping it") to fix NULL pointer bugs.
> 
> This patch is separated from the first patch to make it easier to revert
> if we are sure we can drop this logic.
> 
> Cc: Ben Greear <greearb@...delatech.com>
> Cc: Patrick McHardy <kaber@...sh.net>
> Cc: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
> Signed-off-by: Hannes Frederic Sowa <hannes@...essinduktion.org>

Applied.
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