From f81b2e7d8cf8c6a52b7a5224c3b89cee5aeb6811 Mon Sep 17 00:00:00 2001
From: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Date: Wed, 25 Jun 2008 16:55:26 +0900
Subject: [PATCH] ipv6: Do not forward packets with the unspecified source
address.
RFC4291 2.5.2.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
---
net/ipv6/ip6_output.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index fd7cd1bfe151..871bdec09edb 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -498,7 +498,8 @@ int ip6_forward(struct sk_buff *skb)
int addrtype = ipv6_addr_type(&hdr->saddr);
/* This check is security critical. */
- if (addrtype & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LOOPBACK))
+ if (addrtype == IPV6_ADDR_ANY ||
+ addrtype & (IPV6_ADDR_MULTICAST | IPV6_ADDR_LOOPBACK))
goto error;
if (addrtype & IPV6_ADDR_LINKLOCAL) {
icmpv6_send(skb, ICMPV6_DEST_UNREACH,
--
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