From 283283c4da91adc44b03519f434ee1e7e91d6fdb Mon Sep 17 00:00:00 2001 From: Julian Anastasov Date: Sat, 7 Jul 2012 20:30:11 +0300 Subject: ipvs: fix oops in ip_vs_dst_event on rmmod After commit 39f618b4fd95ae243d940ec64c961009c74e3333 (3.4) "ipvs: reset ipvs pointer in netns" we can oops in ip_vs_dst_event on rmmod ip_vs because ip_vs_control_cleanup is called after the ipvs_core_ops subsys is unregistered and net->ipvs is NULL. Fix it by exiting early from ip_vs_dst_event if ipvs is NULL. It is safe because all services and dests for the net are already freed. Signed-off-by: Julian Anastasov Signed-off-by: Simon Horman Signed-off-by: Pablo Neira Ayuso --- net/netfilter/ipvs/ip_vs_ctl.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'net/netfilter/ipvs/ip_vs_ctl.c') diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c index d43e3c122f7b..84444dda194b 100644 --- a/net/netfilter/ipvs/ip_vs_ctl.c +++ b/net/netfilter/ipvs/ip_vs_ctl.c @@ -1521,11 +1521,12 @@ static int ip_vs_dst_event(struct notifier_block *this, unsigned long event, { struct net_device *dev = ptr; struct net *net = dev_net(dev); + struct netns_ipvs *ipvs = net_ipvs(net); struct ip_vs_service *svc; struct ip_vs_dest *dest; unsigned int idx; - if (event != NETDEV_UNREGISTER) + if (event != NETDEV_UNREGISTER || !ipvs) return NOTIFY_DONE; IP_VS_DBG(3, "%s() dev=%s\n", __func__, dev->name); EnterFunction(2); @@ -1551,7 +1552,7 @@ static int ip_vs_dst_event(struct notifier_block *this, unsigned long event, } } - list_for_each_entry(dest, &net_ipvs(net)->dest_trash, n_list) { + list_for_each_entry(dest, &ipvs->dest_trash, n_list) { __ip_vs_dev_reset(dest, dev); } mutex_unlock(&__ip_vs_mutex); -- cgit v1.2.3-55-g7522