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| author | Ursula Braun <ursula.braun@de.ibm.com> | 2010-10-24 23:06:43 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-10-27 11:37:30 -0700 |
| commit | 853dc2e03ddd0c49885ed55c48755d2b1073122a (patch) | |
| tree | 04269eb6d7e502ee4db2b3658b0eef22c67d34eb | |
| parent | 66c68bcc489fadd4f5e8839e966e3a366e50d1d5 (diff) | |
| download | linux-853dc2e03ddd0c49885ed55c48755d2b1073122a.tar.bz2 | |
ipv6: fix refcnt problem related to POSTDAD state
After running this bonding setup script
modprobe bonding miimon=100 mode=0 max_bonds=1
ifconfig bond0 10.1.1.1/16
ifenslave bond0 eth1
ifenslave bond0 eth3
on s390 with qeth-driven slaves, modprobe -r fails with this message
unregister_netdevice: waiting for bond0 to become free. Usage count = 1
due to twice detection of duplicate address.
Problem is caused by a missing decrease of ifp->refcnt in addrconf_dad_failure.
An extra call of in6_ifa_put(ifp) solves it.
Problem has been introduced with commit f2344a131bccdbfc5338e17fa71a807dee7944fa.
Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv6/addrconf.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index ef6fc16ae5d9..e048ec62d109 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -1427,8 +1427,10 @@ void addrconf_dad_failure(struct inet6_ifaddr *ifp) { struct inet6_dev *idev = ifp->idev; - if (addrconf_dad_end(ifp)) + if (addrconf_dad_end(ifp)) { + in6_ifa_put(ifp); return; + } if (net_ratelimit()) printk(KERN_INFO "%s: IPv6 duplicate address %pI6c detected!\n", |