This is a note to let you know that I've just added the patch titled
ipv6: del unreachable route when an addr is deleted on lo
to the 3.5-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-del-unreachable-route-when-an-addr-is-deleted-on-lo.patch
and it can be found in the queue-3.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 820c6de05d0bd6d77eea64fa26316185db1ea87a Mon Sep 17 00:00:00 2001
From: Nicolas Dichtel <[email protected]>
Date: Wed, 26 Sep 2012 00:04:55 +0000
Subject: ipv6: del unreachable route when an addr is deleted on lo
From: Nicolas Dichtel <[email protected]>
[ Upstream commit 64c6d08e6490fb18cea09bb03686c149946bd818 ]
When an address is added on loopback (ip -6 a a 2002::1/128 dev lo), two routes
are added:
- one in the local table:
local 2002::1 via :: dev lo proto none metric 0
- one the in main table (for the prefix):
unreachable 2002::1 dev lo proto kernel metric 256 error -101
When the address is deleted, the route inserted in the main table remains
because we use rt6_lookup(), which returns NULL when dst->error is set, which
is the case here! Thus, it is better to use ip6_route_lookup() to avoid this
kind of filter.
Signed-off-by: Nicolas Dichtel <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/ipv6/addrconf.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -793,10 +793,16 @@ static void ipv6_del_addr(struct inet6_i
struct in6_addr prefix;
struct rt6_info *rt;
struct net *net = dev_net(ifp->idev->dev);
+ struct flowi6 fl6 = {};
+
ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
- rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1);
+ fl6.flowi6_oif = ifp->idev->dev->ifindex;
+ fl6.daddr = prefix;
+ rt = (struct rt6_info *)ip6_route_lookup(net, &fl6,
+ RT6_LOOKUP_F_IFACE);
- if (rt && addrconf_is_prefix_route(rt)) {
+ if (rt != net->ipv6.ip6_null_entry &&
+ addrconf_is_prefix_route(rt)) {
if (onlink == 0) {
ip6_del_rt(rt);
rt = NULL;
Patches currently in stable-queue which might be from [email protected]
are
queue-3.5/ipv6-del-unreachable-route-when-an-addr-is-deleted-on-lo.patch
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