From: Hannes Frederic Sowa <hannes@stressinduktion.org>
Date: Wed, 7 Aug 2013 00:34:31 +0000 (+0200)
Subject: ipv6: don't stop backtracking in fib6_lookup_1 if subtree does not match
X-Git-Tag: v3.11-rc6~11^2~36
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3e3be275851bc6fc90bfdcd732cd95563acd982b;p=pandora-kernel.git

ipv6: don't stop backtracking in fib6_lookup_1 if subtree does not match

In case a subtree did not match we currently stop backtracking and return
NULL (root table from fib_lookup). This could yield in invalid routing
table lookups when using subtrees.

Instead continue to backtrack until a valid subtree or node is found
and return this match.

Also remove unneeded NULL check.

Reported-by: Teco Boot <teco@inf-net.nl>
Cc: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Cc: David Lamparter <equinox@diac24.net>
Cc: <boutier@pps.univ-paris-diderot.fr>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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