[Zesty][PATCH 2/2] UBUNTU: SAUCE: net sched actions: decrement module refcount earlier

[Fabian Grünbichler]

From: Wolfgang Bumiller <w.bumiller at proxmox.com>

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1682368

Whether the reference count has to be decremented depends
on whether the policy was created. If TCA_ACT_COOKIE is
passed and an error occurs there, the same condition still
has to be honored.

Signed-off-by: Wolfgang Bumiller <w.bumiller at proxmox.com>
(cherry-picked from http://marc.info/?l=linux-netdev&m=149200742616349)
Signed-off-by: Fabian Grünbichler <f.gruenbichler at proxmox.com>
---
 net/sched/act_api.c | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index 32f12f5..07068ca 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -607,28 +607,29 @@ struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla,
 	if (err < 0)
 		goto err_mod;
 
+	/* module count goes up only when brand new policy is created
+	 * if it exists and is only bound to in a_o->init() then
+	 * ACT_P_CREATED is not returned (a zero is).
+	 */
+	if (err != ACT_P_CREATED)
+		module_put(a_o->owner);
+
 	if (name == NULL && tb[TCA_ACT_COOKIE]) {
 		int cklen = nla_len(tb[TCA_ACT_COOKIE]);
 
 		if (cklen > TC_COOKIE_MAX_SIZE) {
 			err = -EINVAL;
 			tcf_hash_release(a, bind);
-			goto err_mod;
+			goto err_out;
 		}
 
 		if (nla_memdup_cookie(a, tb) < 0) {
 			err = -ENOMEM;
 			tcf_hash_release(a, bind);
-			goto err_mod;
+			goto err_out;
 		}
 	}
 
-	/* module count goes up only when brand new policy is created
-	 * if it exists and is only bound to in a_o->init() then
-	 * ACT_P_CREATED is not returned (a zero is).
-	 */
-	if (err != ACT_P_CREATED)
-		module_put(a_o->owner);
 
 	return a;
 
-- 
2.1.4