From: Sascha Hlusiak <contact@saschahlusiak.de>
Date: Tue, 19 May 2009 12:56:51 +0000 (+0000)
Subject: addrconf: refuse isatap eui64 for INADDR_ANY
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=9af28511be10e175eb0cabb2ba5cfafe77408d84;p=linux-beck.git

addrconf: refuse isatap eui64 for INADDR_ANY

A tunnel with no local ipv4 endpoint would otherwise use the
ISATAP linklocal address fe80::5efe:0:0, which is invalid. Rather not
add a linklocal address at all.

Signed-off-by: Sascha Hlusiak <contact@saschahlusiak.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 9eb61c7cae57..31938e5fb220 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -1520,6 +1520,8 @@ static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
 
 int __ipv6_isatap_ifid(u8 *eui, __be32 addr)
 {
+	if (addr == 0)
+		return -1;
 	eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
 		  ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
 		  ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||