diff --git a/components/bt/controller/bt.c b/components/bt/controller/bt.c
index 5c6637030..00172ecbc 100644
--- a/components/bt/controller/bt.c
+++ b/components/bt/controller/bt.c
@@ -972,7 +972,7 @@ static esp_err_t try_heap_caps_add_region(intptr_t start, intptr_t end)
 esp_err_t esp_bt_controller_mem_release(esp_bt_mode_t mode)
 {
     bool update = true;
-    intptr_t mem_start, mem_end;
+    intptr_t mem_start=(intptr_t) NULL, mem_end=(intptr_t) NULL;
 
     if (btdm_controller_status != ESP_BT_CONTROLLER_STATUS_IDLE) {
         return ESP_ERR_INVALID_STATE;
diff --git a/components/bt/host/bluedroid/bta/av/bta_av_api.c b/components/bt/host/bluedroid/bta/av/bta_av_api.c
index 2876fb1e2..284cd8c52 100644
--- a/components/bt/host/bluedroid/bta/av/bta_av_api.c
+++ b/components/bt/host/bluedroid/bta/av/bta_av_api.c
@@ -116,7 +116,7 @@ void BTA_AvRegister(tBTA_AV_CHNL chnl, const char *p_service_name, UINT8 app_id,
         p_buf->hdr.layer_specific   = chnl;
         p_buf->hdr.event = BTA_AV_API_REGISTER_EVT;
         if (p_service_name) {
-            BCM_STRNCPY_S(p_buf->p_service_name, sizeof(p_buf->p_service_name), p_service_name, BTA_SERVICE_NAME_LEN);
+            BCM_STRNCPY_S(p_buf->p_service_name, p_service_name, BTA_SERVICE_NAME_LEN);
             p_buf->p_service_name[BTA_SERVICE_NAME_LEN - 1] = 0;
         } else {
             p_buf->p_service_name[0] = 0;
diff --git a/components/bt/host/bluedroid/bta/av/bta_av_main.c b/components/bt/host/bluedroid/bta/av/bta_av_main.c
index f66936526..77d43c042 100644
--- a/components/bt/host/bluedroid/bta/av/bta_av_main.c
+++ b/components/bt/host/bluedroid/bta/av/bta_av_main.c
@@ -483,8 +483,7 @@ static void bta_av_api_sink_enable(tBTA_AV_DATA *p_data)
     activate_sink = p_data->hdr.layer_specific;
     APPL_TRACE_DEBUG("bta_av_api_sink_enable %d \n", activate_sink)
     char p_service_name[BTA_SERVICE_NAME_LEN + 1];
-    BCM_STRNCPY_S(p_service_name, sizeof(p_service_name),
-                  BTIF_AVK_SERVICE_NAME, BTA_SERVICE_NAME_LEN);
+    BCM_STRNCPY_S(p_service_name, BTIF_AVK_SERVICE_NAME, BTA_SERVICE_NAME_LEN);
 
     if (activate_sink) {
         AVDT_SINK_Activate();
@@ -526,7 +525,7 @@ static void bta_av_api_register(tBTA_AV_DATA *p_data)
     tBTA_UTL_COD    cod;
     UINT8           index = 0;
     char p_avk_service_name[BTA_SERVICE_NAME_LEN + 1];
-    BCM_STRNCPY_S(p_avk_service_name, sizeof(p_avk_service_name), BTIF_AVK_SERVICE_NAME, BTA_SERVICE_NAME_LEN);
+    BCM_STRNCPY_S(p_avk_service_name, BTIF_AVK_SERVICE_NAME, BTA_SERVICE_NAME_LEN);
 
     memset(&cs, 0, sizeof(tAVDT_CS));
 
diff --git a/components/bt/host/bluedroid/bta/dm/bta_dm_act.c b/components/bt/host/bluedroid/bta/dm/bta_dm_act.c
index c597b23ce..1a96c5f85 100644
--- a/components/bt/host/bluedroid/bta/dm/bta_dm_act.c
+++ b/components/bt/host/bluedroid/bta/dm/bta_dm_act.c
@@ -1879,7 +1879,7 @@ void bta_dm_sdp_result (tBTA_DM_MSG *p_data)
                         if (SDP_FindServiceUUIDInRec(p_sdp_rec, &service_uuid)) {
                             /* send result back to app now, one by one */
                             bdcpy (result.disc_ble_res.bd_addr, bta_dm_search_cb.peer_bdaddr);
-                            BCM_STRNCPY_S((char *)result.disc_ble_res.bd_name, sizeof(BD_NAME), bta_dm_get_remname(), (BD_NAME_LEN));
+                            BCM_STRNCPY_S((char *)result.disc_ble_res.bd_name, bta_dm_get_remname(), (BD_NAME_LEN));
                             result.disc_ble_res.bd_name[BD_NAME_LEN] = 0;
                             result.disc_ble_res.service.len = service_uuid.len;
                             result.disc_ble_res.service.uu.uuid16 = service_uuid.uu.uuid16;
@@ -2020,8 +2020,7 @@ void bta_dm_sdp_result (tBTA_DM_MSG *p_data)
 
                 }
                 bdcpy (p_msg->disc_result.result.disc_res.bd_addr, bta_dm_search_cb.peer_bdaddr);
-                BCM_STRNCPY_S((char *)p_msg->disc_result.result.disc_res.bd_name, sizeof(BD_NAME),
-                              bta_dm_get_remname(), (BD_NAME_LEN - 1));
+                BCM_STRNCPY_S((char *)p_msg->disc_result.result.disc_res.bd_name, bta_dm_get_remname(), (BD_NAME_LEN - 1));
 
                 /* make sure the string is null terminated */
                 p_msg->disc_result.result.disc_res.bd_name[BD_NAME_LEN - 1] = 0;
@@ -2047,8 +2046,7 @@ void bta_dm_sdp_result (tBTA_DM_MSG *p_data)
             p_msg->disc_result.result.disc_res.result = BTA_FAILURE;
             p_msg->disc_result.result.disc_res.services = bta_dm_search_cb.services_found;
             bdcpy (p_msg->disc_result.result.disc_res.bd_addr, bta_dm_search_cb.peer_bdaddr);
-            BCM_STRNCPY_S((char *)p_msg->disc_result.result.disc_res.bd_name, sizeof(BD_NAME),
-                          bta_dm_get_remname(), (BD_NAME_LEN - 1));
+            BCM_STRNCPY_S((char *)p_msg->disc_result.result.disc_res.bd_name,bta_dm_get_remname(), (BD_NAME_LEN - 1));
 
             /* make sure the string is null terminated */
             p_msg->disc_result.result.disc_res.bd_name[BD_NAME_LEN - 1] = 0;
@@ -2432,8 +2430,7 @@ static void bta_dm_find_services ( BD_ADDR bd_addr)
             p_msg->hdr.event = BTA_DM_DISCOVERY_RESULT_EVT;
             p_msg->disc_result.result.disc_res.services = bta_dm_search_cb.services_found;
             bdcpy (p_msg->disc_result.result.disc_res.bd_addr, bta_dm_search_cb.peer_bdaddr);
-            BCM_STRNCPY_S((char *)p_msg->disc_result.result.disc_res.bd_name, sizeof(BD_NAME),
-                          bta_dm_get_remname(), (BD_NAME_LEN - 1));
+            BCM_STRNCPY_S((char *)p_msg->disc_result.result.disc_res.bd_name,bta_dm_get_remname(), (BD_NAME_LEN - 1));
 
             /* make sure the string is terminated */
             p_msg->disc_result.result.disc_res.bd_name[BD_NAME_LEN - 1] = 0;
@@ -2618,8 +2615,7 @@ static void bta_dm_discover_device(BD_ADDR remote_bd_addr)
         p_msg->disc_result.result.disc_res.result = BTA_SUCCESS;
         p_msg->disc_result.result.disc_res.services = bta_dm_search_cb.services_found;
         bdcpy (p_msg->disc_result.result.disc_res.bd_addr, bta_dm_search_cb.peer_bdaddr);
-        BCM_STRNCPY_S((char *)p_msg->disc_result.result.disc_res.bd_name,  sizeof(BD_NAME),
-                      (char *)bta_dm_search_cb.peer_name, (BD_NAME_LEN - 1));
+        BCM_STRNCPY_S((char *)p_msg->disc_result.result.disc_res.bd_name,(char *)bta_dm_search_cb.peer_name, (BD_NAME_LEN - 1));
 
         /* make sure the string is terminated */
         p_msg->disc_result.result.disc_res.bd_name[BD_NAME_LEN - 1] = 0;
@@ -2763,7 +2759,7 @@ static void bta_dm_service_search_remname_cback (BD_ADDR bd_addr, DEV_CLASS dc,
             rem_name.length = (BD_NAME_LEN - 1);
             rem_name.remote_bd_name[(BD_NAME_LEN - 1)] = 0;
         }
-        BCM_STRNCPY_S((char *)rem_name.remote_bd_name,  sizeof(BD_NAME), (char *)bd_name, (BD_NAME_LEN - 1));
+        BCM_STRNCPY_S((char *)rem_name.remote_bd_name, (char *)bd_name, (BD_NAME_LEN - 1));
         rem_name.status = BTM_SUCCESS;
 
         bta_dm_remname_cback(&rem_name);
@@ -2805,7 +2801,7 @@ static void bta_dm_remname_cback (tBTM_REMOTE_DEV_NAME *p_remote_name)
                      p_remote_name->remote_bd_name);
     /* remote name discovery is done but it could be failed */
     bta_dm_search_cb.name_discover_done = TRUE;
-    BCM_STRNCPY_S((char *)bta_dm_search_cb.peer_name, sizeof(BD_NAME), (char *)p_remote_name->remote_bd_name, (BD_NAME_LEN));
+    BCM_STRNCPY_S((char *)bta_dm_search_cb.peer_name, (char *)p_remote_name->remote_bd_name, (BD_NAME_LEN));
     bta_dm_search_cb.peer_name[BD_NAME_LEN] = 0;
 
     BTM_SecDeleteRmtNameNotifyCallback(&bta_dm_service_search_remname_cback);
@@ -2818,7 +2814,7 @@ static void bta_dm_remname_cback (tBTM_REMOTE_DEV_NAME *p_remote_name)
 
     if ((p_msg = (tBTA_DM_REM_NAME *) osi_malloc(sizeof(tBTA_DM_REM_NAME))) != NULL) {
         bdcpy (p_msg->result.disc_res.bd_addr, bta_dm_search_cb.peer_bdaddr);
-        BCM_STRNCPY_S((char *)p_msg->result.disc_res.bd_name, sizeof(BD_NAME), (char *)p_remote_name->remote_bd_name, (BD_NAME_LEN));
+        BCM_STRNCPY_S((char *)p_msg->result.disc_res.bd_name, (char *)p_remote_name->remote_bd_name, (BD_NAME_LEN));
 
         /* make sure the string is null terminated */
         p_msg->result.disc_res.bd_name[BD_NAME_LEN] = 0;
@@ -2849,7 +2845,7 @@ static UINT8 bta_dm_authorize_cback (BD_ADDR bd_addr, DEV_CLASS dev_class, BD_NA
     bdcpy(sec_event.authorize.bd_addr, bd_addr);
     memcpy(sec_event.authorize.dev_class, dev_class, DEV_CLASS_LEN);
 
-    BCM_STRNCPY_S((char *)sec_event.authorize.bd_name, sizeof(BD_NAME), (char *)bd_name, (BD_NAME_LEN - 1));
+    BCM_STRNCPY_S((char *)sec_event.authorize.bd_name, (char *)bd_name, (BD_NAME_LEN - 1));
 
     /* make sure the string is null terminated */
     sec_event.authorize.bd_name[BD_NAME_LEN - 1] = 0;
@@ -2963,7 +2959,7 @@ static UINT8 bta_dm_pin_cback (BD_ADDR bd_addr, DEV_CLASS dev_class, BD_NAME bd_
 
     bdcpy(sec_event.pin_req.bd_addr, bd_addr);
     BTA_COPY_DEVICE_CLASS(sec_event.pin_req.dev_class, dev_class);
-    BCM_STRNCPY_S((char *)sec_event.pin_req.bd_name, sizeof(BD_NAME), (char *)bd_name, (BD_NAME_LEN - 1));
+    BCM_STRNCPY_S((char *)sec_event.pin_req.bd_name, (char *)bd_name, (BD_NAME_LEN - 1));
     sec_event.pin_req.bd_name[BD_NAME_LEN - 1] = 0;
     sec_event.pin_req.min_16_digit = min_16_digit;
 
@@ -3134,8 +3130,7 @@ static UINT8 bta_dm_sp_cback (tBTM_SP_EVT event, tBTM_SP_EVT_DATA *p_data)
                    copy these values into key_notif from cfm_req */
                 bdcpy(sec_event.key_notif.bd_addr, p_data->cfm_req.bd_addr);
                 BTA_COPY_DEVICE_CLASS(sec_event.key_notif.dev_class, p_data->cfm_req.dev_class);
-                BCM_STRNCPY_S((char *)sec_event.key_notif.bd_name, sizeof(BD_NAME),
-                              (char *)p_data->cfm_req.bd_name, (BD_NAME_LEN - 1));
+                BCM_STRNCPY_S((char *)sec_event.key_notif.bd_name, (char *)p_data->cfm_req.bd_name, (BD_NAME_LEN - 1));
                 sec_event.key_notif.bd_name[BD_NAME_LEN - 1] = 0;
             }
         }
@@ -3156,8 +3151,7 @@ static UINT8 bta_dm_sp_cback (tBTM_SP_EVT event, tBTM_SP_EVT_DATA *p_data)
             } else {
                 bdcpy(sec_event.key_notif.bd_addr, p_data->key_notif.bd_addr);
                 BTA_COPY_DEVICE_CLASS(sec_event.key_notif.dev_class, p_data->key_notif.dev_class);
-                BCM_STRNCPY_S((char *)sec_event.key_notif.bd_name, sizeof(BD_NAME),
-                              (char *)p_data->key_notif.bd_name, (BD_NAME_LEN - 1));
+                BCM_STRNCPY_S((char *)sec_event.key_notif.bd_name, (char *)p_data->key_notif.bd_name, (BD_NAME_LEN - 1));
                 sec_event.key_notif.bd_name[BD_NAME_LEN - 1] = 0;
             }
         }
@@ -3178,8 +3172,7 @@ static UINT8 bta_dm_sp_cback (tBTM_SP_EVT event, tBTM_SP_EVT_DATA *p_data)
             } else {
                 bdcpy(sec_event.key_notif.bd_addr, p_data->key_notif.bd_addr);
                 BTA_COPY_DEVICE_CLASS(sec_event.key_notif.dev_class, p_data->key_notif.dev_class);
-                BCM_STRNCPY_S((char *)sec_event.key_notif.bd_name, sizeof(BD_NAME),
-                              (char *)p_data->key_notif.bd_name, (BD_NAME_LEN - 1));
+                BCM_STRNCPY_S((char *)sec_event.key_notif.bd_name,(char *)p_data->key_notif.bd_name, (BD_NAME_LEN - 1));
                 sec_event.key_notif.bd_name[BD_NAME_LEN - 1] = 0;
             }
         }
@@ -3208,7 +3201,7 @@ static UINT8 bta_dm_sp_cback (tBTM_SP_EVT event, tBTM_SP_EVT_DATA *p_data)
 
         bdcpy(sec_event.rmt_oob.bd_addr, p_data->rmt_oob.bd_addr);
         BTA_COPY_DEVICE_CLASS(sec_event.rmt_oob.dev_class, p_data->rmt_oob.dev_class);
-        BCM_STRNCPY_S((char *)sec_event.rmt_oob.bd_name, sizeof(BD_NAME), (char *)p_data->rmt_oob.bd_name, (BD_NAME_LEN - 1));
+        BCM_STRNCPY_S((char *)sec_event.rmt_oob.bd_name, (char *)p_data->rmt_oob.bd_name, (BD_NAME_LEN - 1));
         sec_event.rmt_oob.bd_name[BD_NAME_LEN - 1] = 0;
 
         bta_dm_cb.p_sec_cback(BTA_DM_SP_RMT_OOB_EVT, &sec_event);
@@ -4616,8 +4609,7 @@ static UINT8 bta_dm_ble_smp_cback (tBTM_LE_EVT event, BD_ADDR bda, tBTM_LE_EVT_D
         bdcpy(sec_event.ble_req.bd_addr, bda);
         p_name = BTM_SecReadDevName(bda);
         if (p_name != NULL) {
-            BCM_STRNCPY_S((char *)sec_event.ble_req.bd_name,
-                          sizeof(BD_NAME), p_name, (BD_NAME_LEN));
+            BCM_STRNCPY_S((char *)sec_event.ble_req.bd_name,p_name, (BD_NAME_LEN));
         } else {
             sec_event.ble_req.bd_name[0] = 0;
         }
@@ -4629,8 +4621,7 @@ static UINT8 bta_dm_ble_smp_cback (tBTM_LE_EVT event, BD_ADDR bda, tBTM_LE_EVT_D
         bdcpy(sec_event.key_notif.bd_addr, bda);
         p_name = BTM_SecReadDevName(bda);
         if (p_name != NULL) {
-            BCM_STRNCPY_S((char *)sec_event.key_notif.bd_name,
-                          sizeof(BD_NAME), p_name, (BD_NAME_LEN));
+            BCM_STRNCPY_S((char *)sec_event.key_notif.bd_name, p_name, (BD_NAME_LEN));
         } else {
             sec_event.key_notif.bd_name[0] = 0;
         }
@@ -4651,7 +4642,7 @@ static UINT8 bta_dm_ble_smp_cback (tBTM_LE_EVT event, BD_ADDR bda, tBTM_LE_EVT_D
 
     case BTM_LE_NC_REQ_EVT:
         bdcpy(sec_event.key_notif.bd_addr, bda);
-        BCM_STRNCPY_S((char *)sec_event.key_notif.bd_name, sizeof(BD_NAME), bta_dm_get_remname(), (BD_NAME_LEN));
+        BCM_STRNCPY_S((char *)sec_event.key_notif.bd_name,bta_dm_get_remname(), (BD_NAME_LEN));
         sec_event.ble_req.bd_name[BD_NAME_LEN] = 0;
         sec_event.key_notif.passkey = p_data->key_notif;
         bta_dm_cb.p_sec_cback(BTA_DM_BLE_NC_REQ_EVT, &sec_event);
@@ -4671,8 +4662,7 @@ static UINT8 bta_dm_ble_smp_cback (tBTM_LE_EVT event, BD_ADDR bda, tBTM_LE_EVT_D
 #endif
         p_name = BTM_SecReadDevName(bda);
         if (p_name != NULL) {
-            BCM_STRNCPY_S((char *)sec_event.auth_cmpl.bd_name,
-                          sizeof(BD_NAME), p_name, (BD_NAME_LEN));
+            BCM_STRNCPY_S((char *)sec_event.auth_cmpl.bd_name, p_name, (BD_NAME_LEN));
         } else {
             sec_event.auth_cmpl.bd_name[0] = 0;
         }
@@ -5962,7 +5952,7 @@ static void bta_dm_gatt_disc_result(tBTA_GATT_ID service_id)
 
         /* send result back to app now, one by one */
         bdcpy (result.disc_ble_res.bd_addr, bta_dm_search_cb.peer_bdaddr);
-        BCM_STRNCPY_S((char *)result.disc_ble_res.bd_name, sizeof(BD_NAME), bta_dm_get_remname(), (BD_NAME_LEN - 1));
+        BCM_STRNCPY_S((char *)result.disc_ble_res.bd_name, bta_dm_get_remname(), (BD_NAME_LEN - 1));
         result.disc_ble_res.bd_name[BD_NAME_LEN] = 0;
         memcpy(&result.disc_ble_res.service, &service_id.uuid, sizeof(tBT_UUID));
 
@@ -6005,8 +5995,7 @@ static void bta_dm_gatt_disc_complete(UINT16 conn_id, tBTA_GATT_STATUS status)
             p_msg->disc_result.result.disc_res.num_uuids = 0;
             p_msg->disc_result.result.disc_res.p_uuid_list = NULL;
             bdcpy (p_msg->disc_result.result.disc_res.bd_addr, bta_dm_search_cb.peer_bdaddr);
-            BCM_STRNCPY_S((char *)p_msg->disc_result.result.disc_res.bd_name, sizeof(BD_NAME),
-                          bta_dm_get_remname(), (BD_NAME_LEN - 1));
+            BCM_STRNCPY_S((char *)p_msg->disc_result.result.disc_res.bd_name,bta_dm_get_remname(), (BD_NAME_LEN - 1));
 
             /* make sure the string is terminated */
             p_msg->disc_result.result.disc_res.bd_name[BD_NAME_LEN - 1] = 0;
diff --git a/components/bt/host/bluedroid/bta/dm/bta_dm_api.c b/components/bt/host/bluedroid/bta/dm/bta_dm_api.c
index d429edaab..17695ad21 100644
--- a/components/bt/host/bluedroid/bta/dm/bta_dm_api.c
+++ b/components/bt/host/bluedroid/bta/dm/bta_dm_api.c
@@ -174,7 +174,7 @@ void BTA_DmSetDeviceName(const char *p_name)
     if ((p_msg = (tBTA_DM_API_SET_NAME *) osi_malloc(sizeof(tBTA_DM_API_SET_NAME))) != NULL) {
         p_msg->hdr.event = BTA_DM_API_SET_NAME_EVT;
         /* truncate the name if needed */
-        BCM_STRNCPY_S((char *)p_msg->name, sizeof(p_msg->name), p_name, BD_NAME_LEN - 1);
+        BCM_STRNCPY_S((char *)p_msg->name, p_name, BD_NAME_LEN - 1);
         p_msg->name[BD_NAME_LEN - 1] = 0;
 
         bta_sys_sendmsg(p_msg);
diff --git a/components/bt/host/bluedroid/bta/hf_ag/bta_ag_api.c b/components/bt/host/bluedroid/bta/hf_ag/bta_ag_api.c
index 1d1e62cc1..37925be26 100644
--- a/components/bt/host/bluedroid/bta/hf_ag/bta_ag_api.c
+++ b/components/bt/host/bluedroid/bta/hf_ag/bta_ag_api.c
@@ -122,7 +122,7 @@ void BTA_AgRegister(tBTA_SERVICE_MASK services, tBTA_SEC sec_mask,tBTA_AG_FEAT f
         p_buf->app_id = app_id;
         for (i = 0; i < BTA_AG_NUM_IDX; i++) {
             if(p_service_names[i]) {
-                BCM_STRNCPY_S(p_buf->p_name[i], BTA_SERVICE_NAME_LEN+1, p_service_names[i], BTA_SERVICE_NAME_LEN);
+                BCM_STRNCPY_S(p_buf->p_name[i], p_service_names[i], BTA_SERVICE_NAME_LEN);
                 p_buf->p_name[i][BTA_SERVICE_NAME_LEN] = 0;
             } else {
                 p_buf->p_name[i][0] = 0;
diff --git a/components/bt/host/bluedroid/bta/hf_ag/bta_ag_cmd.c b/components/bt/host/bluedroid/bta/hf_ag/bta_ag_cmd.c
index fe7100f19..78b989802 100644
--- a/components/bt/host/bluedroid/bta/hf_ag/bta_ag_cmd.c
+++ b/components/bt/host/bluedroid/bta/hf_ag/bta_ag_cmd.c
@@ -356,7 +356,7 @@ static void bta_ag_send_result(tBTA_AG_SCB *p_scb, UINT8 code, char *p_arg, INT1
     *p++ = '\n';
 
     /* copy result code string */
-    BCM_STRCPY_S(p, sizeof(buf), bta_ag_result_tbl[code].p_res);
+    BCM_STRCPY_S(p, bta_ag_result_tbl[code].p_res);
 #if defined(BTA_HSP_RESULT_REPLACE_COLON) && (BTA_HSP_RESULT_REPLACE_COLON == TRUE)
     if(p_scb->conn_service == BTA_AG_HSP) {
         /* If HSP then ":"symbol should be changed as "=" for HSP compatibility */
@@ -382,7 +382,7 @@ static void bta_ag_send_result(tBTA_AG_SCB *p_scb, UINT8 code, char *p_arg, INT1
     if (bta_ag_result_tbl[code].fmt == BTA_AG_RES_FMT_INT) {
         p += utl_itoa((UINT16) int_arg, p);
     } else if (bta_ag_result_tbl[code].fmt == BTA_AG_RES_FMT_STR) {
-        BCM_STRCPY_S(p, sizeof(buf), p_arg);
+        BCM_STRCPY_S(p, p_arg);
         p += strlen(p_arg);
     }
     /* finish with \r\n */
@@ -426,14 +426,14 @@ static void bta_ag_send_multi_result(tBTA_AG_SCB *p_scb, tBTA_AG_MULTI_RESULT_CB
         *p++ = '\n';
 
         /* copy result code string */
-        BCM_STRCPY_S(p, sizeof(buf), bta_ag_result_tbl[m_res_cb->res_cb[res_idx].code].p_res);
+        BCM_STRCPY_S(p, bta_ag_result_tbl[m_res_cb->res_cb[res_idx].code].p_res);
         p += strlen(bta_ag_result_tbl[m_res_cb->res_cb[res_idx].code].p_res);
 
         /* copy argument if any */
         if (bta_ag_result_tbl[m_res_cb->res_cb[res_idx].code].fmt == BTA_AG_RES_FMT_INT) {
             p += utl_itoa((UINT16) m_res_cb->res_cb[res_idx].int_arg, p);
         } else if (bta_ag_result_tbl[m_res_cb->res_cb[res_idx].code].fmt == BTA_AG_RES_FMT_STR) {
-            BCM_STRCPY_S(p, sizeof(buf), m_res_cb->res_cb[res_idx].p_arg);
+            BCM_STRCPY_S(p, m_res_cb->res_cb[res_idx].p_arg);
             p += strlen(m_res_cb->res_cb[res_idx].p_arg);
         }
         /* finish with \r\n */
@@ -716,7 +716,7 @@ static void bta_ag_process_unat_res(char *unat_result)
         /* Add EOF */
         trim_data[j] = '\0';
         str_leng = str_leng - 4;
-        BCM_STRNCPY_S(unat_result, BTA_AG_AT_MAX_LEN+1, trim_data,str_leng+1);
+        BCM_STRNCPY_S(unat_result, trim_data, BTA_AG_AT_MAX_LEN);
         i=0;
         j=0;
         if(str_leng <4) {
@@ -797,7 +797,7 @@ void bta_ag_at_hsp_cback(tBTA_AG_SCB *p_scb, UINT16 cmd, UINT8 arg_type,
     val.hdr.handle = bta_ag_scb_to_idx(p_scb);
     val.hdr.app_id = p_scb->app_id;
     val.num = (UINT16) int_arg;
-    BCM_STRNCPY_S(val.str, sizeof(val.str), p_arg, BTA_AG_AT_MAX_LEN);
+    BCM_STRNCPY_S(val.str, p_arg, BTA_AG_AT_MAX_LEN);
     val.str[BTA_AG_AT_MAX_LEN] = 0;
     /* call callback with event */
     (*bta_ag_cb.p_cback)(bta_ag_hsp_cb_evt[cmd], (tBTA_AG *) &val);
@@ -835,7 +835,7 @@ void bta_ag_at_hfp_cback(tBTA_AG_SCB *p_scb, UINT16 cmd, UINT8 arg_type,
     val.hdr.app_id = p_scb->app_id;
     val.num = int_arg;
     bdcpy(val.bd_addr, p_scb->peer_addr);
-    BCM_STRNCPY_S(val.str, sizeof(val.str), p_arg, BTA_AG_AT_MAX_LEN);
+    BCM_STRNCPY_S(val.str, p_arg, BTA_AG_AT_MAX_LEN);
     val.str[BTA_AG_AT_MAX_LEN] = 0;
     event = bta_ag_hfp_cb_evt[cmd];
 
@@ -1211,7 +1211,7 @@ void bta_ag_at_err_cback(tBTA_AG_SCB *p_scb, BOOLEAN unknown, char *p_arg)
         val.hdr.handle = bta_ag_scb_to_idx(p_scb);
         val.hdr.app_id = p_scb->app_id;
         val.num = 0;
-        BCM_STRNCPY_S(val.str, sizeof(val.str), p_arg, BTA_AG_AT_MAX_LEN);
+        BCM_STRNCPY_S(val.str, p_arg, BTA_AG_AT_MAX_LEN);
         val.str[BTA_AG_AT_MAX_LEN] = 0;
         (*bta_ag_cb.p_cback)(BTA_AG_AT_UNAT_EVT, (tBTA_AG *) &val);
     } else {
diff --git a/components/bt/host/bluedroid/bta/hf_client/bta_hf_client_api.c b/components/bt/host/bluedroid/bta/hf_client/bta_hf_client_api.c
index 434b2b520..ea51879c2 100644
--- a/components/bt/host/bluedroid/bta/hf_client/bta_hf_client_api.c
+++ b/components/bt/host/bluedroid/bta/hf_client/bta_hf_client_api.c
@@ -141,7 +141,7 @@ void BTA_HfClientRegister(tBTA_SEC sec_mask, tBTA_HF_CLIENT_FEAT features,
         p_buf->features = features;
         p_buf->sec_mask = sec_mask;
         if (p_service_name) {
-            BCM_STRNCPY_S(p_buf->name, BTA_SERVICE_NAME_LEN + 1, p_service_name, BTA_SERVICE_NAME_LEN);
+            BCM_STRNCPY_S(p_buf->name, p_service_name, BTA_SERVICE_NAME_LEN);
             p_buf->name[BTA_SERVICE_NAME_LEN] = 0;
         } else {
             p_buf->name[0] = '\0';
diff --git a/components/bt/host/bluedroid/stack/avdt/avdt_api.c b/components/bt/host/bluedroid/stack/avdt/avdt_api.c
index c0adc07e6..1d1637108 100644
--- a/components/bt/host/bluedroid/stack/avdt/avdt_api.c
+++ b/components/bt/host/bluedroid/stack/avdt/avdt_api.c
@@ -1195,7 +1195,7 @@ UINT16 AVDT_SendReport(UINT8 handle, AVDT_REPORT_TYPE type,
                     len = AVDT_MAX_CNAME_SIZE;
                 }
                 *p++ = (UINT8)len;
-                BCM_STRNCPY_S((char *)p, len + 1, (char *)p_data->cname, len + 1);
+                BCM_STRNCPY_S((char *)p, (char *)p_data->cname, AVDT_MAX_CNAME_SIZE + 1);
                 p += len;
                 break;
             }
diff --git a/components/bt/host/bluedroid/stack/btm/btm_ble.c b/components/bt/host/bluedroid/stack/btm/btm_ble.c
index c2000d8d5..a0ab1d30d 100644
--- a/components/bt/host/bluedroid/stack/btm/btm_ble.c
+++ b/components/bt/host/bluedroid/stack/btm/btm_ble.c
@@ -119,8 +119,7 @@ BOOLEAN BTM_SecAddBleDevice (BD_ADDR bd_addr, BD_NAME bd_name, tBT_DEVICE_TYPE d
 
     if (bd_name && bd_name[0]) {
         p_dev_rec->sec_flags |= BTM_SEC_NAME_KNOWN;
-        BCM_STRNCPY_S ((char *)p_dev_rec->sec_bd_name, sizeof (p_dev_rec->sec_bd_name),
-                       (char *)bd_name, BTM_MAX_REM_BD_NAME_LEN);
+        BCM_STRNCPY_S ((char *)p_dev_rec->sec_bd_name, (char *)bd_name, BTM_MAX_REM_BD_NAME_LEN);
     }
     p_dev_rec->device_type |= dev_type;
     p_dev_rec->ble.ble_addr_type = addr_type;
diff --git a/components/bt/host/bluedroid/stack/btm/btm_dev.c b/components/bt/host/bluedroid/stack/btm/btm_dev.c
index 2280ed080..b1002baa5 100644
--- a/components/bt/host/bluedroid/stack/btm/btm_dev.c
+++ b/components/bt/host/bluedroid/stack/btm/btm_dev.c
@@ -108,8 +108,7 @@ BOOLEAN BTM_SecAddDevice (BD_ADDR bd_addr, DEV_CLASS dev_class, BD_NAME bd_name,
 
     if (bd_name && bd_name[0]) {
         p_dev_rec->sec_flags |= BTM_SEC_NAME_KNOWN;
-        BCM_STRNCPY_S ((char *)p_dev_rec->sec_bd_name, sizeof (p_dev_rec->sec_bd_name),
-                       (char *)bd_name, BTM_MAX_REM_BD_NAME_LEN);
+        BCM_STRNCPY_S ((char *)p_dev_rec->sec_bd_name, (char *)bd_name, BTM_MAX_REM_BD_NAME_LEN);
     }
 
     p_dev_rec->num_read_pages = 0;
diff --git a/components/bt/host/bluedroid/stack/btm/btm_devctl.c b/components/bt/host/bluedroid/stack/btm/btm_devctl.c
index 1f85dcf5a..bef3eb627 100644
--- a/components/bt/host/bluedroid/stack/btm/btm_devctl.c
+++ b/components/bt/host/bluedroid/stack/btm/btm_devctl.c
@@ -457,7 +457,7 @@ tBTM_STATUS BTM_SetLocalDeviceName (char *p_name)
     /* Save the device name if local storage is enabled */
     p = (UINT8 *)btm_cb.cfg.bd_name;
     if (p != (UINT8 *)p_name) {
-        BCM_STRNCPY_S(btm_cb.cfg.bd_name, sizeof(btm_cb.cfg.bd_name), p_name, BTM_MAX_LOC_BD_NAME_LEN);
+        BCM_STRNCPY_S(btm_cb.cfg.bd_name, p_name, BTM_MAX_LOC_BD_NAME_LEN);
         btm_cb.cfg.bd_name[BTM_MAX_LOC_BD_NAME_LEN] = '\0';
     }
 #else
diff --git a/components/bt/host/bluedroid/stack/btm/btm_sec.c b/components/bt/host/bluedroid/stack/btm/btm_sec.c
index c7099747d..a52fadfdb 100644
--- a/components/bt/host/bluedroid/stack/btm/btm_sec.c
+++ b/components/bt/host/bluedroid/stack/btm/btm_sec.c
@@ -585,7 +585,7 @@ static BOOLEAN btm_sec_set_security_level (CONNECTION_TYPE conn_type, const char
     if (is_originator) {
         p_srec->orig_mx_chan_id = mx_chan_id;
 #if BTM_SEC_SERVICE_NAME_LEN > 0
-        BCM_STRNCPY_S ((char *)p_srec->orig_service_name, sizeof(p_srec->orig_service_name), p_name, BTM_SEC_SERVICE_NAME_LEN);
+        BCM_STRNCPY_S ((char *)p_srec->orig_service_name, p_name, BTM_SEC_SERVICE_NAME_LEN);
 #endif
         /* clear out the old setting, just in case it exists */
 #if (L2CAP_UCD_INCLUDED == TRUE)
@@ -630,7 +630,7 @@ static BOOLEAN btm_sec_set_security_level (CONNECTION_TYPE conn_type, const char
     } else {
         p_srec->term_mx_chan_id = mx_chan_id;
 #if BTM_SEC_SERVICE_NAME_LEN > 0
-        BCM_STRNCPY_S ((char *)p_srec->term_service_name, sizeof(p_srec->term_service_name), p_name, BTM_SEC_SERVICE_NAME_LEN);
+        BCM_STRNCPY_S ((char *)p_srec->term_service_name, p_name, BTM_SEC_SERVICE_NAME_LEN);
 #endif
         /* clear out the old setting, just in case it exists */
 #if (L2CAP_UCD_INCLUDED == TRUE)
@@ -3024,7 +3024,7 @@ void btm_sec_rmt_name_request_complete (UINT8 *p_bd_addr, UINT8 *p_bd_name, UINT
     if (p_dev_rec) {
         old_sec_state = p_dev_rec->sec_state;
         if (status == HCI_SUCCESS) {
-            BCM_STRNCPY_S ((char *)p_dev_rec->sec_bd_name, sizeof (p_dev_rec->sec_bd_name), (char *)p_bd_name, BTM_MAX_REM_BD_NAME_LEN);
+            BCM_STRNCPY_S ((char *)p_dev_rec->sec_bd_name, (char *)p_bd_name, BTM_MAX_REM_BD_NAME_LEN);
             p_dev_rec->sec_flags |= BTM_SEC_NAME_KNOWN;
             BTM_TRACE_EVENT ("setting BTM_SEC_NAME_KNOWN sec_flags:0x%x\n", p_dev_rec->sec_flags);
         } else {
@@ -3520,7 +3520,7 @@ void btm_proc_sp_req_evt (tBTM_SP_EVT event, UINT8 *p)
         memcpy (evt_data.cfm_req.bd_addr, p_dev_rec->bd_addr, BD_ADDR_LEN);
         memcpy (evt_data.cfm_req.dev_class, p_dev_rec->dev_class, DEV_CLASS_LEN);
 
-        BCM_STRNCPY_S ((char *)evt_data.cfm_req.bd_name, sizeof(evt_data.cfm_req.bd_name), (char *)p_dev_rec->sec_bd_name, BTM_MAX_REM_BD_NAME_LEN);
+        BCM_STRCPY_S ((char *)evt_data.cfm_req.bd_name,(char *)p_dev_rec->sec_bd_name);
 
         switch (event) {
         case BTM_SP_CFM_REQ_EVT:
@@ -3745,7 +3745,7 @@ void btm_rem_oob_req (UINT8 *p)
             btm_cb.api.p_sp_callback) {
         memcpy (evt_data.bd_addr, p_dev_rec->bd_addr, BD_ADDR_LEN);
         memcpy (evt_data.dev_class, p_dev_rec->dev_class, DEV_CLASS_LEN);
-        BCM_STRNCPY_S((char *)evt_data.bd_name, sizeof(evt_data.bd_name), (char *)p_dev_rec->sec_bd_name, BTM_MAX_REM_BD_NAME_LEN + 1);
+        BCM_STRNCPY_S((char *)evt_data.bd_name, (char *)p_dev_rec->sec_bd_name, BTM_MAX_REM_BD_NAME_LEN);
         evt_data.bd_name[BTM_MAX_REM_BD_NAME_LEN] = 0;
 
         btm_sec_change_pairing_state(BTM_PAIR_STATE_WAIT_LOCAL_OOB_RSP);
diff --git a/components/bt/host/bluedroid/stack/gatt/gatt_utils.c b/components/bt/host/bluedroid/stack/gatt/gatt_utils.c
index 611f5bed2..d6f339cf3 100644
--- a/components/bt/host/bluedroid/stack/gatt/gatt_utils.c
+++ b/components/bt/host/bluedroid/stack/gatt/gatt_utils.c
@@ -2325,7 +2325,7 @@ void gatt_dbg_display_uuid(tBT_UUID bt_uuid)
                 bt_uuid.uu.uuid128[3], bt_uuid.uu.uuid128[2],
                 bt_uuid.uu.uuid128[1], bt_uuid.uu.uuid128[0]);
     } else {
-        BCM_STRNCPY_S(str_buf, sizeof(str_buf), "Unknown UUID 0", 15);
+        BCM_STRNCPY_S(str_buf, "Unknown UUID 0", 15);
     }
 
     GATT_TRACE_DEBUG ("UUID=[%s]", str_buf);
diff --git a/components/bt/host/bluedroid/stack/include/stack/bt_types.h b/components/bt/host/bluedroid/stack/include/stack/bt_types.h
index e5f716d6e..e30f6b705 100644
--- a/components/bt/host/bluedroid/stack/include/stack/bt_types.h
+++ b/components/bt/host/bluedroid/stack/include/stack/bt_types.h
@@ -36,8 +36,8 @@ typedef bool BOOLEAN;
 #define PACKED  __packed
 // #define INLINE  __inline
 
-#define BCM_STRCPY_S(x1,x2,x3)      strcpy((x1),(x3))
-#define BCM_STRNCPY_S(x1,x2,x3,x4)  strncpy((x1),(x3),(x4))
+#define BCM_STRCPY_S(x1,x2)      strcpy((x1),(x2))
+#define BCM_STRNCPY_S(x1,x2,x3)  strncpy((x1),(x2),(x3))
 
 /* READ WELL !!
 **