ipv6: don't stop backtracking in fib6_lookup_1 if subtree does not match
authorHannes Frederic Sowa <hannes@stressinduktion.org>
Wed, 7 Aug 2013 00:34:31 +0000 (02:34 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sat, 14 Sep 2013 12:50:48 +0000 (05:50 -0700)
commit24e6771d4fce7c77b2569fa33131c871a2c5642e
treef88a069753ea62d24fe25b34127767cf8a8fe4a3
parentdd3004635fe0607f64ca9ceca51f209fbc0a09a6
ipv6: don't stop backtracking in fib6_lookup_1 if subtree does not match

[ Upstream commit 3e3be275851bc6fc90bfdcd732cd95563acd982b ]

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
net/ipv6/ip6_fib.c