ipvs: null check of net->ipvs in lblc(r) shedulers

Avoid crash when registering shedulers after
the IPVS core initialization for netns fails. Do this by
checking for present core (net->ipvs).

Signed-off-by: Hans Schillstrom <hans.schillstrom@ericsson.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>

2 files changed, 6 insertions, 0 deletions

diff --git a/net/netfilter/ipvs/ip_vs_lblc.c b/net/netfilter/ipvs/ip_vs_lblc.c
index 0f16283fd058..caa43704e55e 100644
--- a/net/netfilter/ipvs/ip_vs_lblc.c
+++ b/net/netfilter/ipvs/ip_vs_lblc.c
@@ -551,6 +551,9 @@ static int __net_init __ip_vs_lblc_init(struct net *net)
 {
         struct netns_ipvs *ipvs = net_ipvs(net);
 
+        if (!ipvs)
+                return -ENOENT;
+
         if (!net_eq(net, &init_net)) {
                 ipvs->lblc_ctl_table = kmemdup(vs_vars_table,
                                                 sizeof(vs_vars_table),
diff --git a/net/netfilter/ipvs/ip_vs_lblcr.c b/net/netfilter/ipvs/ip_vs_lblcr.c
index eec797f8cce7..548bf37aa29e 100644
--- a/net/netfilter/ipvs/ip_vs_lblcr.c
+++ b/net/netfilter/ipvs/ip_vs_lblcr.c
@@ -745,6 +745,9 @@ static int __net_init __ip_vs_lblcr_init(struct net *net)
 {
         struct netns_ipvs *ipvs = net_ipvs(net);
 
+        if (!ipvs)
+                return -ENOENT;
+
         if (!net_eq(net, &init_net)) {
                 ipvs->lblcr_ctl_table = kmemdup(vs_vars_table,
                                                 sizeof(vs_vars_table),