Subject: [patch 1/1] [PATCH BUG_FIX] ipv6: fix refcnt problem related to POSTDAD state
From: Ursula Braun <ursula.braun@xxxxxxxxxx>
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@xxxxxxxxxx>
Cc: David S. Miller <davem@xxxxxxxxxxxxx>
Cc: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
---
net/ipv6/addrconf.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -1426,8 +1426,10 @@ void addrconf_dad_failure(struct inet6_i
{
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",
--
To unsubscribe from this list: send the line "unsubscribe linux-s390" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
