You also need to modify the pthread deletion code to free the memory,…

… otherwise it would be leaked.

components/pthread/pthread.c

@@ -38,6 +38,8 @@ typedef struct esp_pthread_entry {
     bool                        detached;       ///< True if pthread is detached
     void                       *retval;         ///< Value supplied to calling thread during join
     void                       *task_arg;       ///< Task arguments
+    StackType_t                *stack_for_task; ///< Task stack
+    StaticTask_t               *taskTC;         ///< Task taskTC
 } esp_pthread_t;
 
 /** pthread wrapper task arg */
@@ -121,6 +123,9 @@ static esp_pthread_t *pthread_find(TaskHandle_t task_handle)
 static void pthread_delete(esp_pthread_t *pthread)
 {
     SLIST_REMOVE(&s_threads_list, pthread, esp_pthread_entry, list_node);
+    free(pthread->task_arg);
+    free(pthread->stack_for_task);
+    free(pthread->taskTC);
     free(pthread);
 }
 
@@ -289,6 +294,7 @@ int pthread_create(pthread_t *thread, const pthread_attr_t *attr,
         free(task_arg);
     	return ENOMEM;
     }
+    pthread->stack_for_task = stack_for_task;
     StaticTask_t *taskTC =  (StaticTask_t *) heap_caps_calloc(1, sizeof(StaticTask_t), MALLOC_CAP_INTERNAL|MALLOC_CAP_8BIT);
     if (taskTC == NULL) {
         ESP_LOGE(TAG, "Failed to create task!");
@@ -297,6 +303,7 @@ int pthread_create(pthread_t *thread, const pthread_attr_t *attr,
         free(stack_for_task);
     	return ENOMEM;
     }
+    pthread->taskTC = taskTC;
     xHandle = xTaskCreateStaticPinnedToCore(&pthread_task_func,
                                              task_name,
 											 size_stack,