Fix potential CORRUPT HEAP problem on libraries/BLE/src/BLEDevice.cpp (espressif#7597)

* Update BLEDevice.cpp

fix potential CORRUPT HEAP problem

* move mux to BLEDevice class

Author: CurryEx

libraries/BLE/src/BLEDevice.cpp

@@ -629,10 +629,15 @@ void BLEDevice::addPeerDevice(void* peer, bool _client, uint16_t conn_id) {
 	m_connectedClientsMap.insert(std::pair<uint16_t, conn_status_t>(conn_id, status));
 }
 
+//there may have some situation that invoking this function simultaneously, that will cause CORRUPT HEAP
+//let this function serializable
+portMUX_TYPE BLEDevice::mux = portMUX_INITIALIZER_UNLOCKED;
 void BLEDevice::removePeerDevice(uint16_t conn_id, bool _client) {
+	portENTER_CRITICAL(&mux);
 	log_i("remove: %d, GATT role %s", conn_id, _client?"client":"server");
 	if(m_connectedClientsMap.find(conn_id) != m_connectedClientsMap.end())
 		m_connectedClientsMap.erase(conn_id);
+	portEXIT_CRITICAL(&mux);
 }
 
 /* multi connect support */

libraries/BLE/src/BLEDevice.h

@@ -73,6 +73,7 @@ class BLEDevice {
 	static BLEAdvertising* m_bleAdvertising;
 	static esp_gatt_if_t getGattcIF();
 	static std::map<uint16_t, conn_status_t> m_connectedClientsMap;	
+	static portMUX_TYPE mux;
 
 	static void gattClientEventHandler(
 		esp_gattc_cb_event_t      event,