This is a note to let you know that I've just added the patch titled
ipv6: don't stop backtracking in fib6_lookup_1 if subtree does not match
to the 3.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ipv6-don-t-stop-backtracking-in-fib6_lookup_1-if-subtree-does-not-match.patch
and it can be found in the queue-3.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 40d36e4b306f4f316723c31758b1ad7a473b3de1 Mon Sep 17 00:00:00 2001
From: Hannes Frederic Sowa <hannes@xxxxxxxxxxxxxxxxxxx>
Date: Wed, 7 Aug 2013 02:34:31 +0200
Subject: ipv6: don't stop backtracking in fib6_lookup_1 if subtree does not match
From: Hannes Frederic Sowa <hannes@xxxxxxxxxxxxxxxxxxx>
[ 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@xxxxxxxxxx>
Cc: YOSHIFUJI Hideaki <yoshfuji@xxxxxxxxxxxxxx>
Cc: David Lamparter <equinox@xxxxxxxxxx>
Cc: <boutier@xxxxxxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Hannes Frederic Sowa <hannes@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/ipv6/ip6_fib.c | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -866,14 +866,22 @@ static struct fib6_node * fib6_lookup_1(
if (ipv6_prefix_equal(&key->addr, args->addr, key->plen)) {
#ifdef CONFIG_IPV6_SUBTREES
- if (fn->subtree)
- fn = fib6_lookup_1(fn->subtree, args + 1);
+ if (fn->subtree) {
+ struct fib6_node *sfn;
+ sfn = fib6_lookup_1(fn->subtree,
+ args + 1);
+ if (!sfn)
+ goto backtrack;
+ fn = sfn;
+ }
#endif
- if (!fn || fn->fn_flags & RTN_RTINFO)
+ if (fn->fn_flags & RTN_RTINFO)
return fn;
}
}
-
+#ifdef CONFIG_IPV6_SUBTREES
+backtrack:
+#endif
if (fn->fn_flags & RTN_ROOT)
break;
Patches currently in stable-queue which might be from hannes@xxxxxxxxxxxxxxxxxxx are
queue-3.0/ipv6-don-t-stop-backtracking-in-fib6_lookup_1-if-subtree-does-not-match.patch
queue-3.0/ipv6-remove-max_addresses-check-from-ipv6_create_tempaddr.patch
queue-3.0/icmpv6-treat-dest-unreachable-codes-5-and-6-as-eacces-not-eproto.patch
queue-3.0/net-bridge-convert-mldv2-query-mrc-into-msecs_to_jiffies-for-max_delay.patch
queue-3.0/ipv6-don-t-depend-on-per-socket-memory-for-neighbour-discovery-messages.patch
queue-3.0/ipv6-drop-packets-with-multiple-fragmentation-headers.patch
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