4.16-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Davide Caratti <dcara...@redhat.com>

[ Upstream commit 5a4931ae0193f8a4a97e8260fd0df1d705d83299 ]

Similarly to what was done with commit a52956dfc503 ("net sched actions:
fix refcnt leak in skbmod"), fix the error path of tcf_vlan_init() to avoid
refcnt leaks when wrong value of TCA_VLAN_PUSH_VLAN_PROTOCOL is given.

Fixes: 5026c9b1bafc ("net sched: vlan action fix late binding")
CC: Roman Mashak <m...@mojatatu.com>
Signed-off-by: Davide Caratti <dcara...@redhat.com>
Acked-by: Jamal Hadi Salim <j...@mojatatu.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 net/sched/act_vlan.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/net/sched/act_vlan.c
+++ b/net/sched/act_vlan.c
@@ -161,6 +161,8 @@ static int tcf_vlan_init(struct net *net
                        case htons(ETH_P_8021AD):
                                break;
                        default:
+                               if (exists)
+                                       tcf_idr_release(*a, bind);
                                return -EPROTONOSUPPORT;
                        }
                } else {


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