netdev - Re: [net-next PATCH] fib_trie: Correctly handle case of key == 0 in leaf_walk

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Date:	Tue, 10 Mar 2015 16:14:26 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	sd@...asysnail.net
Cc:	alexander.h.duyck@...hat.com, netdev@...r.kernel.org
Subject: Re: [net-next PATCH] fib_trie: Correctly handle case of key == 0
 in leaf_walk_rcu

From: Sabrina Dubroca <sd@...asysnail.net>
Date: Tue, 10 Mar 2015 19:48:39 +0100

> 2015-03-10, 11:25:41 -0700, Alexander Duyck wrote:
>> In the case of a trie that had no tnodes with a key of 0 the initial
>> look-up would fail resulting in an out-of-bounds cindex on the first tnode.
>> This resulted in an entire trie being skipped.
>> 
>> In order resolve this I have updated the cindex logic in the initial
>> look-up so that if the key is zero we will always traverse the child zero
>> path.
>> 
>> Fixes: 8be33e95 ("fib_trie: Fib walk rcu should take a tnode and key instead of a trie and a leaf")
>> Reported-by: Sabrina Dubroca <sd@...asysnail.net>
>> Signed-off-by: Alexander Duyck <alexander.h.duyck@...hat.com>
>> ---
> 
> Tested-by: Sabrina Dubroca <sd@...asysnail.net>

Applied, thanks everyone.
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