@@ -111,6 +111,15 @@ int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt
ipv6_addr_loopback(&hdr->daddr))
goto err;
+ /* RFC4291 2.7
+ * Nodes must not originate a packet to a multicast address whose scope
+ * field contains the reserved value 0; if such a packet is received, it
+ * must be silently dropped.
+ */
+ if (ipv6_addr_is_multicast(&hdr->daddr) &&
+ IPV6_ADDR_MC_SCOPE(&hdr->daddr) == 0)
+ goto err;
+
/*
* RFC4291 2.7
* Multicast addresses must not be used as source addresses in IPv6
This is a note to let you know that I have just added a patch titled ipv6: don't accept multicast traffic with scope 0 to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.5.y.z tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Luis ------ From f8c161ee7246233ddfb110499d3174d8f093a425 Mon Sep 17 00:00:00 2001 From: Hannes Frederic Sowa <hannes@stressinduktion.org> Date: Sun, 10 Feb 2013 05:35:22 +0000 Subject: [PATCH] ipv6: don't accept multicast traffic with scope 0 commit 20314092c1b41894d8c181bf9aa6f022be2416aa upstream. v2: a) moved before multicast source address check b) changed comment to netdev style Cc: Erik Hugne <erik.hugne@ericsson.com> Cc: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Acked-by: 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> Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- net/ipv6/ip6_input.c | 9 +++++++++ 1 file changed, 9 insertions(+) -- 1.8.1.2