diff --git a/kernel/time/timer.c b/kernel/time/timer.c
index d111adf4a0cb..9c68832163f4 100644
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -636,6 +636,7 @@ static bool timer_fixup_init(void *addr, enum debug_obj_state state)
 
 	switch (state) {
 	case ODEBUG_STATE_ACTIVE:
+		pr_info("DC %s: del_timer_sync: %p\n", __func__, timer);
 		del_timer_sync(timer);
 		debug_object_init(timer, &timer_debug_descr);
 		return true;
diff --git a/lib/debugobjects.c b/lib/debugobjects.c
index 9e14ae02306b..88553311ec3a 100644
--- a/lib/debugobjects.c
+++ b/lib/debugobjects.c
@@ -585,7 +585,7 @@ __debug_object_init(void *addr, const struct debug_obj_descr *descr, int onstack
 	case ODEBUG_STATE_ACTIVE:
 		state = obj->state;
 		raw_spin_unlock_irqrestore(&db->lock, flags);
-		debug_print_object(obj, "init");
+		//debug_print_object(obj, "init");
 		debug_object_fixup(descr->fixup_init, addr, state);
 		return;
 
diff --git a/net/ipv4/netfilter/arp_tables.c b/net/ipv4/netfilter/arp_tables.c
index cf20316094d0..c63bc4fdc2f3 100644
--- a/net/ipv4/netfilter/arp_tables.c
+++ b/net/ipv4/netfilter/arp_tables.c
@@ -1560,6 +1560,10 @@ void arpt_unregister_table_pre_exit(struct net *net, const char *name,
 				    const struct nf_hook_ops *ops)
 {
 	struct xt_table *table = xt_find_table(net, NFPROTO_ARP, name);
+	pr_info("DC %s: name: %s\n", __func__, name);
+
+	if (strcmp(name, "filter") == 0)
+		return;
 
 	if (table)
 		nf_unregister_net_hooks(net, ops, hweight32(table->valid_hooks));
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 7a99892e5aba..bf8fae3127c2 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -154,6 +154,7 @@ static int ieee80211_change_iface(struct wiphy *wiphy,
 	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 	int ret;
 
+	pr_info("DC %s: type: %d\n", __func__, type);
 	ret = ieee80211_if_change_type(sdata, type);
 	if (ret)
 		return ret;
diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index a7ac53a2f00d..c83e93f1bc45 100644
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -1731,6 +1731,7 @@ void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata)
 {
 	struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
 
+	pr_info("DC %s: timer_setup: %p\n", __func__, &ifibss->timer);
 	timer_setup(&ifibss->timer, ieee80211_ibss_timer, 0);
 	INIT_LIST_HEAD(&ifibss->incomplete_stations);
 	spin_lock_init(&ifibss->incomplete_lock);
@@ -1886,6 +1887,7 @@ int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata)
 	skb_queue_purge(&sdata->skb_queue);
 
 	del_timer_sync(&sdata->u.ibss.timer);
+	pr_info("DC %s: del_timer_sync: %p\n", __func__, &sdata->u.ibss.timer);
 
 	return 0;
 }
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 7032a2b59249..9fde78f4d0bb 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -1494,6 +1494,7 @@ static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
 
 	/* clear type-dependent union */
 	memset(&sdata->u, 0, sizeof(sdata->u));
+	pr_info("DC %s: type:(%d) memset(sdata->u): %p\n", __func__, type, &sdata->u);
 
 	/* and set some type-dependent values */
 	sdata->vif.type = type;
@@ -1655,6 +1656,7 @@ static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
 	 */
 	ieee80211_check_queues(sdata, type);
 
+	pr_info("DC %s: calling ieee80211_setup_sdata\n", __func__);
 	ieee80211_setup_sdata(sdata, type);
 	ieee80211_set_vif_encap_ops(sdata);
 
@@ -1683,6 +1685,7 @@ int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
 	} else {
 		/* Purge and reset type-dependent state. */
 		ieee80211_teardown_sdata(sdata);
+		pr_info("DC %s: calling ieee80211_setup_sdata\n", __func__);
 		ieee80211_setup_sdata(sdata, type);
 	}
 
@@ -1972,6 +1975,7 @@ int ieee80211_if_add(struct ieee80211_local *local, const char *name,
 	sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
 
 	/* setup type-dependent data */
+	pr_info("DC %s: calling ieee80211_setup_sdata\n", __func__);
 	ieee80211_setup_sdata(sdata, type);
 
 	if (ndev) {
diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index 97095b7c9c64..15c7e12b3d5c 100644
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -1091,6 +1091,7 @@ void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata)
 	local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf);
 	skb_queue_purge(&ifmsh->ps.bc_buf);
 
+	pr_info("DC %s: del_timer_sync housekeeping_timer: %p\n", __func__, &sdata->u.mesh.housekeeping_timer);
 	del_timer_sync(&sdata->u.mesh.housekeeping_timer);
 	del_timer_sync(&sdata->u.mesh.mesh_path_root_timer);
 	del_timer_sync(&sdata->u.mesh.mesh_path_timer);
@@ -1605,6 +1606,7 @@ void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata)
 	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 	static u8 zero_addr[ETH_ALEN] = {};
 
+	pr_info("DC %s: timer_setup housekeeping: %p\n", __func__, &ifmsh->housekeeping_timer);
 	timer_setup(&ifmsh->housekeeping_timer,
 		    ieee80211_mesh_housekeeping_timer, 0);
 
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 2480bd0577bb..2667a131f76e 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -2456,6 +2456,7 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
 
 	del_timer_sync(&sdata->u.mgd.conn_mon_timer);
 	del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
+	pr_info("DC %s: del_timer_sync: %p\n", __func__, &sdata->u.mgd.timer);
 	del_timer_sync(&sdata->u.mgd.timer);
 	del_timer_sync(&sdata->u.mgd.chswitch_timer);
 
@@ -2895,6 +2896,7 @@ static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
 		 * running is the timeout for the authentication response which
 		 * which is not relevant anymore.
 		 */
+		pr_info("DC %s: del_timer_sync: %p\n", __func__, &sdata->u.mgd.timer);
 		del_timer_sync(&sdata->u.mgd.timer);
 		sta_info_destroy_addr(sdata, auth_data->bss->bssid);
 
@@ -2924,6 +2926,7 @@ static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
 		 * running is the timeout for the association response which
 		 * which is not relevant anymore.
 		 */
+		pr_info("DC %s: del_timer_sync: %p\n", __func__, &sdata->u.mgd.timer);
 		del_timer_sync(&sdata->u.mgd.timer);
 		sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
 
@@ -4381,6 +4384,8 @@ static void ieee80211_sta_timer(struct timer_list *t)
 	struct ieee80211_sub_if_data *sdata =
 		from_timer(sdata, t, u.mgd.timer);
 
+	pr_info("DC %s: sta_timer\n", __func__);
+
 	ieee80211_queue_work(&sdata->local->hw, &sdata->work);
 }
 
@@ -4842,6 +4847,7 @@ void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
 	INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
 	INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
 			  ieee80211_tdls_peer_del_work);
+	pr_info("DC %s: timer_setup: %p\n", __func__, &ifmgd->timer);
 	timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0);
 	timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0);
 	timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0);
@@ -5969,6 +5975,7 @@ void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
 	ifmgd->assoc_req_ies = NULL;
 	ifmgd->assoc_req_ies_len = 0;
 	spin_unlock_bh(&ifmgd->teardown_lock);
+	pr_info("DC %s: del_timer_sync: %p\n", __func__, &ifmgd->timer);
 	del_timer_sync(&ifmgd->timer);
 	sdata_unlock(sdata);
 }
diff --git a/net/mac80211/ocb.c b/net/mac80211/ocb.c
index 7c1a735b9eee..b62de86381bf 100644
--- a/net/mac80211/ocb.c
+++ b/net/mac80211/ocb.c
@@ -163,6 +163,7 @@ void ieee80211_ocb_setup_sdata(struct ieee80211_sub_if_data *sdata)
 {
 	struct ieee80211_if_ocb *ifocb = &sdata->u.ocb;
 
+	pr_info("DC %s: timer_setup housekeeping: %p\n", __func__, &ifocb->housekeeping_timer);
 	timer_setup(&ifocb->housekeeping_timer,
 		    ieee80211_ocb_housekeeping_timer, 0);
 	INIT_LIST_HEAD(&ifocb->incomplete_stations);
@@ -233,6 +234,7 @@ int ieee80211_ocb_leave(struct ieee80211_sub_if_data *sdata)
 
 	skb_queue_purge(&sdata->skb_queue);
 
+	pr_info("DC %s: del_timer_sync: %p\n",  __func__, &sdata->u.ocb.housekeeping_timer);
 	del_timer_sync(&sdata->u.ocb.housekeeping_timer);
 	/* If the timer fired while we waited for it, it will have
 	 * requeued the work. Now the work will be running again
diff --git a/net/netfilter/core.c b/net/netfilter/core.c
index 63d032191e62..0eb280ad1c1f 100644
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -477,7 +477,7 @@ static void __nf_unregister_net_hook(struct net *net, int pf,
 #endif
 		nf_static_key_dec(reg, pf);
 	} else {
-		WARN_ONCE(1, "hook not found, pf %d num %d", pf, reg->hooknum);
+		WARN_ONCE(1, "hook not found, pf %d num %d, device name:%s", pf, reg->hooknum, reg->dev->name);
 	}
 
 	p = __nf_hook_entries_try_shrink(p, pp);
diff --git a/net/wireless/ibss.c b/net/wireless/ibss.c
index 8f98e546becf..0730ffd92f1d 100644
--- a/net/wireless/ibss.c
+++ b/net/wireless/ibss.c
@@ -162,8 +162,10 @@ static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext)
 
 	ASSERT_WDEV_LOCK(wdev);
 
-	kfree_sensitive(wdev->connect_keys);
-	wdev->connect_keys = NULL;
+	if(wdev->connect_keys) {
+		kfree_sensitive(wdev->connect_keys);
+		wdev->connect_keys = NULL;
+	}
 
 	rdev_set_qos_map(rdev, dev, NULL);
 
@@ -207,9 +209,6 @@ int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
 
 	ASSERT_WDEV_LOCK(wdev);
 
-	if (!wdev->ssid_len)
-		return -ENOLINK;
-
 	err = rdev_leave_ibss(rdev, dev);
 
 	if (err)
diff --git a/net/wireless/mlme.c b/net/wireless/mlme.c
index 3aa69b375a10..c1354e245160 100644
--- a/net/wireless/mlme.c
+++ b/net/wireless/mlme.c
@@ -362,12 +362,14 @@ int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
 	};
 
 	ASSERT_WDEV_LOCK(wdev);
+	pr_info("DC %s: \n", __func__);
 
 	if (local_state_change &&
 	    (!wdev->current_bss ||
 	     !ether_addr_equal(wdev->current_bss->pub.bssid, bssid)))
 		return 0;
 
+	pr_info("DC %s: A\n", __func__);
 	if (ether_addr_equal(wdev->disconnect_bssid, bssid) ||
 	    (wdev->current_bss &&
 	     ether_addr_equal(wdev->current_bss->pub.bssid, bssid)))
@@ -415,15 +417,17 @@ void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	u8 bssid[ETH_ALEN];
 
+	pr_info("DC %s: \n", __func__);
 	ASSERT_WDEV_LOCK(wdev);
 
 	if (!rdev->ops->deauth)
 		return;
 
-	if (!wdev->current_bss)
-		return;
+	pr_info("DC %s: A\n", __func__);
+	if (wdev->current_bss)
+		memcpy(bssid, wdev->current_bss->pub.bssid, ETH_ALEN);
 
-	memcpy(bssid, wdev->current_bss->pub.bssid, ETH_ALEN);
+	pr_info("DC %s: B\n", __func__);
 	cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0,
 			     WLAN_REASON_DEAUTH_LEAVING, false);
 }
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index fc9286afe3c9..60f16f1f2b12 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -11072,6 +11072,7 @@ static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
 	if (!net_eq(wiphy_net(&rdev->wiphy), net))
 		err = cfg80211_switch_netns(rdev, net);
 
+	pr_info("DC %s: put_net\n", __func__);
 	put_net(net);
 	return err;
 }
diff --git a/net/wireless/ocb.c b/net/wireless/ocb.c
index 2d26a6d980bf..fe677f974d13 100644
--- a/net/wireless/ocb.c
+++ b/net/wireless/ocb.c
@@ -67,6 +67,7 @@ int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
 	if (!rdev->ops->leave_ocb)
 		return -EOPNOTSUPP;
 
+	pr_info("DC %s:\n", __func__);
 	err = rdev_leave_ocb(rdev, dev);
 	if (!err)
 		memset(&wdev->chandef, 0, sizeof(wdev->chandef));
@@ -80,6 +81,7 @@ int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	int err;
 
+	pr_info("DC %s:\n", __func__);
 	wdev_lock(wdev);
 	err = __cfg80211_leave_ocb(rdev, dev);
 	wdev_unlock(wdev);
diff --git a/net/wireless/rdev-ops.h b/net/wireless/rdev-ops.h
index 8b1358d04ca2..91a50986ca00 100644
--- a/net/wireless/rdev-ops.h
+++ b/net/wireless/rdev-ops.h
@@ -379,6 +379,7 @@ static inline int rdev_leave_ocb(struct cfg80211_registered_device *rdev,
 {
 	int ret;
 	trace_rdev_leave_ocb(&rdev->wiphy, dev);
+	pr_info("DC %s:\n", __func__);
 	ret = rdev->ops->leave_ocb(&rdev->wiphy, dev);
 	trace_rdev_return_int(&rdev->wiphy, ret);
 	return ret;
@@ -477,6 +478,7 @@ static inline int rdev_deauth(struct cfg80211_registered_device *rdev,
 {
 	int ret;
 	trace_rdev_deauth(&rdev->wiphy, dev, req);
+	pr_info("DC %s: ops->deauth \n", __func__);
 	ret = rdev->ops->deauth(&rdev->wiphy, dev, req);
 	trace_rdev_return_int(&rdev->wiphy, ret);
 	return ret;
diff --git a/net/wireless/util.c b/net/wireless/util.c
index 382c5262d997..71920af9a980 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -1033,6 +1033,7 @@ int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
 		return -EBUSY;
 
 	if (ntype != otype) {
+		pr_info("DC %s: from otype(%d) to ntype(%d)\n", __func__, otype, ntype);
 		dev->ieee80211_ptr->use_4addr = false;
 		dev->ieee80211_ptr->mesh_id_up_len = 0;
 		wdev_lock(dev->ieee80211_ptr);
@@ -1044,6 +1045,7 @@ int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
 			cfg80211_stop_ap(rdev, dev, true);
 			break;
 		case NL80211_IFTYPE_ADHOC:
+			pr_info("DC %s: cfg80211_leave_ibss\n", __func__);
 			cfg80211_leave_ibss(rdev, dev, false);
 			break;
 		case NL80211_IFTYPE_STATION:
@@ -1055,6 +1057,12 @@ int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
 			break;
 		case NL80211_IFTYPE_MESH_POINT:
 			/* mesh should be handled? */
+			pr_info("DC %s: cfg80211_leave_mesh\n", __func__);
+			cfg80211_leave_mesh(rdev, dev);
+			break;
+		case NL80211_IFTYPE_OCB:
+			pr_info("DC %s: cfg80211_leave_ocb\n", __func__);
+			cfg80211_leave_ocb(rdev, dev);
 			break;
 		default:
 			break;