net_sched: fix a NULL pointer deref in ipt action
The net pointer in struct xt_tgdtor_param is not explicitly
initialized therefore is still NULL when dereferencing it.
So we have to find a way to pass the correct net pointer to
ipt_destroy_target().
The best way I find is just saving the net pointer inside the per
netns struct tcf_idrinfo, which could make this patch smaller.
Fixes: 0c66dc1ea3f0 ("netfilter: conntrack: register hooks in netns when needed by ruleset")
Reported-and-tested-by: itugrok@yahoo.com
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/act_ctinfo.c b/net/sched/act_ctinfo.c
index 06ef74b..0dbcfd1 100644
--- a/net/sched/act_ctinfo.c
+++ b/net/sched/act_ctinfo.c
@@ -376,7 +376,7 @@ static __net_init int ctinfo_init_net(struct net *net)
{
struct tc_action_net *tn = net_generic(net, ctinfo_net_id);
- return tc_action_net_init(tn, &act_ctinfo_ops);
+ return tc_action_net_init(net, tn, &act_ctinfo_ops);
}
static void __net_exit ctinfo_exit_net(struct list_head *net_list)
