[PATCH net] net/sched: fix refcnt leak in the error path of tcf_vlan_init()

[Davide Caratti]

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>
---
 net/sched/act_vlan.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/sched/act_vlan.c b/net/sched/act_vlan.c
index 853604685965..1fb39e1f9d07 100644
--- a/net/sched/act_vlan.c
+++ b/net/sched/act_vlan.c
@@ -161,6 +161,8 @@ static int tcf_vlan_init(struct net *net, struct nlattr 
*nla,
                        case htons(ETH_P_8021AD):
                                break;
                        default:
+                               if (exists)
+                                       tcf_idr_release(*a, bind);
                                return -EPROTONOSUPPORT;
                        }
                } else {
-- 
2.17.0