3.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Hannes Frederic Sowa <hannes@xxxxxxxxxxxxxxxxxxx> [ Upstream commit 20314092c1b41894d8c181bf9aa6f022be2416aa ] v2: a) moved before multicast source address check b) changed comment to netdev style Acked-by: YOSHIFUJI Hideaki <yoshfuji@xxxxxxxxxxxxxx> Cc: Erik Hugne <erik.hugne@xxxxxxxxxxxx> Cc: 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 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html