Bugzilla: 1074471

Upstream-status: queued for 3.14

From c88507fbad8055297c1d1e21e599f46960cbee39 Mon Sep 17 00:00:00 2001

From: Sabrina Dubroca <sd@queasysnail.net>

Date: Thu, 06 Mar 2014 16:51:57 +0000

Subject: ipv6: don't set DST_NOCOUNT for remotely added routes

DST_NOCOUNT should only be used if an authorized user adds routes

locally. In case of routes which are added on behalf of router

advertisments this flag must not get used as it allows an unlimited

number of routes getting added remotely.

Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>

Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>

Signed-off-by: David S. Miller <davem@davemloft.net>

---

diff --git a/net/ipv6/route.c b/net/ipv6/route.c

index 11dac21..fba54a4 100644

--- a/net/ipv6/route.c

+++ b/net/ipv6/route.c

@@ -1513,7 +1513,7 @@ int ip6_route_add(struct fib6_config *cfg)

 	if (!table)

 		goto out;

-	rt = ip6_dst_alloc(net, NULL, DST_NOCOUNT, table);

+	rt = ip6_dst_alloc(net, NULL, (cfg->fc_flags & RTF_ADDRCONF) ? 0 : DST_NOCOUNT, table);

 	if (!rt) {

 		err = -ENOMEM;

--

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