diff --git a/net/sched/cls_tcindex.c b/net/sched/cls_tcindex.c
index 1c9eeb98d826..1c0bee2544d9 100644
--- a/net/sched/cls_tcindex.c
+++ b/net/sched/cls_tcindex.c
@@ -338,6 +338,9 @@ tcindex_set_parms(struct net *net, struct tcf_proto *tp, unsigned long base,
 	struct tcf_result cr = {};
 	int err, balloc = 0;
 	struct tcf_exts e;
+#ifdef CONFIG_NET_CLS_ACT
+	struct tcf_exts old_e = {};
+#endif
 
 	err = tcf_exts_init(&e, net, TCA_TCINDEX_ACT, TCA_TCINDEX_POLICE);
 	if (err < 0)
@@ -479,6 +482,14 @@ tcindex_set_parms(struct net *net, struct tcf_proto *tp, unsigned long base,
 	}
 
 	if (old_r && old_r != r) {
+#ifdef CONFIG_NET_CLS_ACT
+		/* r->exts is not copied from old_r->exts, and
+		 * the following code will clears the old_r, so
+		 * we need to destroy it after update the tp->root,
+		 * to avoid memory leak bug.
+		 */
+		old_e = old_r->exts;
+#endif
 		err = tcindex_filter_result_init(old_r, cp, net);
 		if (err < 0) {
 			kfree(f);
@@ -510,6 +521,9 @@ tcindex_set_parms(struct net *net, struct tcf_proto *tp, unsigned long base,
 		tcf_exts_destroy(&new_filter_result.exts);
 	}
 
+#ifdef CONFIG_NET_CLS_ACT
+	tcf_exts_destroy(&old_e);
+#endif
 	if (oldp)
 		tcf_queue_work(&oldp->rwork, tcindex_partial_destroy_work);
 	return 0;