This is a note to let you know that I've just added the patch titled
ipv6: use rt6_get_dflt_router to get default router in rt6_route_rcv
to the 3.4-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-use-rt6_get_dflt_router-to-get-default-router-in-rt6_route_rcv.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From fd70e6c7a132571d378dba0bd4addea348d00317 Mon Sep 17 00:00:00 2001
From: Duan Jiong <duanj.fnst@xxxxxxxxxxxxxx>
Date: Fri, 8 Nov 2013 09:56:53 +0800
Subject: ipv6: use rt6_get_dflt_router to get default router in rt6_route_rcv
From: Duan Jiong <duanj.fnst@xxxxxxxxxxxxxx>
[ Upstream commit f104a567e673f382b09542a8dc3500aa689957b4 ]
As the rfc 4191 said, the Router Preference and Lifetime values in a
::/0 Route Information Option should override the preference and lifetime
values in the Router Advertisement header. But when the kernel deals with
a ::/0 Route Information Option, the rt6_get_route_info() always return
NULL, that means that overriding will not happen, because those default
routers were added without flag RTF_ROUTEINFO in rt6_add_dflt_router().
In order to deal with that condition, we should call rt6_get_dflt_router
when the prefix length is 0.
Signed-off-by: Duan Jiong <duanj.fnst@xxxxxxxxxxxxxx>
Acked-by: Hannes Frederic Sowa <hannes@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/ipv6/route.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -617,8 +617,11 @@ int rt6_route_rcv(struct net_device *dev
prefix = &prefix_buf;
}
- rt = rt6_get_route_info(net, prefix, rinfo->prefix_len, gwaddr,
- dev->ifindex);
+ if (rinfo->prefix_len == 0)
+ rt = rt6_get_dflt_router(gwaddr, dev);
+ else
+ rt = rt6_get_route_info(net, prefix, rinfo->prefix_len,
+ gwaddr, dev->ifindex);
if (rt && !lifetime) {
ip6_del_rt(rt);
Patches currently in stable-queue which might be from duanj.fnst@xxxxxxxxxxxxxx are
queue-3.4/ipv6-use-rt6_get_dflt_router-to-get-default-router-in-rt6_route_rcv.patch
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