This is a note to let you know that I've just added the patch titled
ipv6: don't accept multicast traffic with scope 0
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-don-t-accept-multicast-traffic-with-scope-0.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 89fabcb0892eea1d8d547f7bc4e883e87b9eb970 Mon Sep 17 00:00:00 2001
From: Hannes Frederic Sowa <hannes@xxxxxxxxxxxxxxxxxxx>
Date: Sun, 10 Feb 2013 05:35:22 +0000
Subject: ipv6: don't accept multicast traffic with scope 0
From: Hannes Frederic Sowa <hannes@xxxxxxxxxxxxxxxxxxx>
[ Upstream commit 20314092c1b41894d8c181bf9aa6f022be2416aa ]
v2:
a) moved before multicast source address check
b) changed comment to netdev style
Cc: Erik Hugne <erik.hugne@xxxxxxxxxxxx>
Cc: YOSHIFUJI Hideaki <yoshfuji@xxxxxxxxxxxxxx>
Acked-by: YOSHIFUJI Hideaki <yoshfuji@xxxxxxxxxxxxxx>
Signed-off-by: Hannes Frederic Sowa <hannes@xxxxxxxxxxxxxxxxxxx>
Acked-by: YOSHIFUJI Hideaki <yoshfuji@xxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/ipv6/ip6_input.c | 9 +++++++++
1 file changed, 9 insertions(+)
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -111,6 +111,15 @@ int ipv6_rcv(struct sk_buff *skb, struct
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
Patches currently in stable-queue which might be from hannes@xxxxxxxxxxxxxxxxxxx are
queue-3.4/atl1e-drop-pci-msi-support-because-of-packet-corruption.patch
queue-3.4/ipv6-don-t-accept-multicast-traffic-with-scope-0.patch
queue-3.4/ipv6-don-t-accept-node-local-multicast-traffic-from-the-wire.patch
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