From: Hannes Frederic Sowa <hannes@stressinduktion.org>
Date: Fri, 8 Mar 2013 02:07:23 +0000 (+0000)
Subject: ipv6: stop multicast forwarding to process interface scoped addresses
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ddf64354af4a702ee0b85d0a285ba74c7278a460;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

ipv6: stop multicast forwarding to process interface scoped addresses

v2:
a) used struct ipv6_addr_props

v3:
a) reverted changes for ipv6_addr_props

v4:
a) do not use __ipv6_addr_needs_scope_id

Cc: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
index b1876e52091e..e33fe0ab2568 100644
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -281,7 +281,8 @@ int ip6_mc_input(struct sk_buff *skb)
 	 *      IPv6 multicast router mode is now supported ;)
 	 */
 	if (dev_net(skb->dev)->ipv6.devconf_all->mc_forwarding &&
-	    !(ipv6_addr_type(&hdr->daddr) & IPV6_ADDR_LINKLOCAL) &&
+	    !(ipv6_addr_type(&hdr->daddr) &
+	      (IPV6_ADDR_LOOPBACK|IPV6_ADDR_LINKLOCAL)) &&
 	    likely(!(IP6CB(skb)->flags & IP6SKB_FORWARDED))) {
 		/*
 		 * Okay, we try to forward - split and duplicate