From 2c12a74cc4aeaebc378aa40ee11c7761a8ed05e0 Mon Sep 17 00:00:00 2001
From: Michal Wrobel <xmxwx@asn.pl>
Date: Mon, 26 Feb 2007 15:36:10 -0800
Subject: [PATCH] [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>
---
net/ipv6/addrconf.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index f6ac65d36559..e16f1bba5dff 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -400,6 +400,8 @@ 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
--
2.34.1