From: Michal Wrobel <xmxwx@asn.pl>
Date: Thu, 8 Mar 2007 07:38:52 +0000 (+0100)
Subject: [IPV6]: anycast refcnt fix
X-Git-Tag: v2.6.16.44-rc1~14
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6ba50d10b7b7d8d0b6ef7150b705897dbfd05507;p=thirdparty%2Fkernel%2Fstable.git

[IPV6]: anycast refcnt fix

This patch fixes a bug in Linux IPv6 stack which caused anycast address
to be added to a device prior DAD has been completed. This led to
incorrect reference count which resulted in infinite wait for
unregister_netdevice completion on interface removal.

Signed-off-by: Michal Wrobel <xmxwx@asn.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
---

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index e8f144171880d..e9e9894d2cab7 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -449,6 +449,8 @@ static void dev_forward_change(struct inet6_dev *idev)
 			ipv6_dev_mc_dec(dev, &addr);
 	}
 	for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
+		if (ifa->flags&IFA_F_TENTATIVE)
+			continue;
 		if (idev->cnf.forwarding)
 			addrconf_join_anycast(ifa);
 		else