1 files changed, 32 insertions, 23 deletions

diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index b70aa57319ea..e05b924618a0 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -529,20 +529,20 @@ errout:
 	return err;
 }
 
-static int nla_memdup_cookie(struct tc_action *a, struct nlattr **tb)
+static struct tc_cookie *nla_memdup_cookie(struct nlattr **tb)
 {
-	a->act_cookie = kzalloc(sizeof(*a->act_cookie), GFP_KERNEL);
-	if (!a->act_cookie)
-		return -ENOMEM;
+	struct tc_cookie *c = kzalloc(sizeof(*c), GFP_KERNEL);
+	if (!c)
+		return NULL;
 
-	a->act_cookie->data = nla_memdup(tb[TCA_ACT_COOKIE], GFP_KERNEL);
-	if (!a->act_cookie->data) {
-		kfree(a->act_cookie);
-		return -ENOMEM;
+	c->data = nla_memdup(tb[TCA_ACT_COOKIE], GFP_KERNEL);
+	if (!c->data) {
+		kfree(c);
+		return NULL;
 	}
-	a->act_cookie->len = nla_len(tb[TCA_ACT_COOKIE]);
+	c->len = nla_len(tb[TCA_ACT_COOKIE]);
 
-	return 0;
+	return c;
 }
 
 struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla,
@@ -551,6 +551,7 @@ struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla,
 {
 	struct tc_action *a;
 	struct tc_action_ops *a_o;
+	struct tc_cookie *cookie = NULL;
 	char act_name[IFNAMSIZ];
 	struct nlattr *tb[TCA_ACT_MAX + 1];
 	struct nlattr *kind;
@@ -566,6 +567,18 @@ struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla,
 			goto err_out;
 		if (nla_strlcpy(act_name, kind, IFNAMSIZ) >= IFNAMSIZ)
 			goto err_out;
+		if (tb[TCA_ACT_COOKIE]) {
+			int cklen = nla_len(tb[TCA_ACT_COOKIE]);
+
+			if (cklen > TC_COOKIE_MAX_SIZE)
+				goto err_out;
+
+			cookie = nla_memdup_cookie(tb);
+			if (!cookie) {
+				err = -ENOMEM;
+				goto err_out;
+			}
+		}
 	} else {
 		err = -EINVAL;
 		if (strlcpy(act_name, name, IFNAMSIZ) >= IFNAMSIZ)
@@ -604,20 +617,12 @@ struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla,
 	if (err < 0)
 		goto err_mod;
 
-	if (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;
-		}
-
-		if (nla_memdup_cookie(a, tb) < 0) {
-			err = -ENOMEM;
-			tcf_hash_release(a, bind);
-			goto err_mod;
+	if (name == NULL && tb[TCA_ACT_COOKIE]) {
+		if (a->act_cookie) {
+			kfree(a->act_cookie->data);
+			kfree(a->act_cookie);
 		}
+		a->act_cookie = cookie;
 	}
 
 	/* module count goes up only when brand new policy is created
@@ -632,6 +637,10 @@ struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla,
 err_mod:
 	module_put(a_o->owner);
 err_out:
+	if (cookie) {
+		kfree(cookie->data);
+		kfree(cookie);
+	}
 	return ERR_PTR(err);
 }