From: Sabrina Dubroca <sd@queasysnail.net>
Date: Wed, 4 Nov 2015 13:47:53 +0000 (+0100)
Subject: ipv6: clean up dev_snmp6 proc entry when we fail to initialize inet6_dev
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=2a189f9e57650e9f310ddf4aad75d66c1233a064;p=linux-beck.git

ipv6: clean up dev_snmp6 proc entry when we fail to initialize inet6_dev

In ipv6_add_dev, when addrconf_sysctl_register fails, we do not clean up
the dev_snmp6 entry that we have already registered for this device.
Call snmp6_unregister_dev in this case.

Fixes: a317a2f19da7d ("ipv6: fail early when creating netdev named all or default")
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index d72fa90d6feb..d84742f003a9 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -418,6 +418,7 @@ static struct inet6_dev *ipv6_add_dev(struct net_device *dev)
 	if (err) {
 		ipv6_mc_destroy_dev(ndev);
 		del_timer(&ndev->regen_timer);
+		snmp6_unregister_dev(ndev);
 		goto err_release;
 	}
 	/* protected by rtnl_lock */