diff --git a/components/app_trace/app_trace.c b/components/app_trace/app_trace.c
index 445e0f7c2..84e39d7b1 100644
--- a/components/app_trace/app_trace.c
+++ b/components/app_trace/app_trace.c
@@ -929,6 +929,9 @@ esp_err_t esp_apptrace_read(esp_apptrace_dest_t dest, void *buf, uint32_t *size,
         ESP_APPTRACE_LOGE("Trace destinations other then TRAX are not supported yet!");
         return ESP_ERR_NOT_SUPPORTED;
     }
+    if (buf == NULL || size == NULL || *size == 0) {
+        return ESP_ERR_INVALID_ARG;
+    }
 
     //TODO: callback system
     esp_apptrace_tmo_init(&tmo, user_tmo);
@@ -963,8 +966,10 @@ uint8_t *esp_apptrace_down_buffer_get(esp_apptrace_dest_t dest, uint32_t *size,
         ESP_APPTRACE_LOGE("Trace destinations other then TRAX are not supported yet!");
         return NULL;
     }
+    if (size == NULL || *size == 0) {
+        return NULL;
+    }
 
-    // ESP_APPTRACE_LOGE("esp_apptrace_down_buffer_get %d", *size);
     esp_apptrace_tmo_init(&tmo, user_tmo);
     return hw->get_down_buffer(size, &tmo);
 }
@@ -985,6 +990,9 @@ esp_err_t esp_apptrace_down_buffer_put(esp_apptrace_dest_t dest, uint8_t *ptr, u
         ESP_APPTRACE_LOGE("Trace destinations other then TRAX are not supported yet!");
         return ESP_ERR_NOT_SUPPORTED;
     }
+    if (ptr == NULL) {
+        return ESP_ERR_INVALID_ARG;
+    }
 
     esp_apptrace_tmo_init(&tmo, user_tmo);
     return hw->put_down_buffer(ptr, &tmo);
@@ -1007,6 +1015,9 @@ esp_err_t esp_apptrace_write(esp_apptrace_dest_t dest, const void *data, uint32_
         ESP_APPTRACE_LOGE("Trace destinations other then TRAX are not supported yet!");
         return ESP_ERR_NOT_SUPPORTED;
     }
+    if (data == NULL || size == 0) {
+        return ESP_ERR_INVALID_ARG;
+    }
 
     esp_apptrace_tmo_init(&tmo, user_tmo);
     ptr = hw->get_up_buffer(size, &tmo);
@@ -1040,6 +1051,9 @@ int esp_apptrace_vprintf_to(esp_apptrace_dest_t dest, uint32_t user_tmo, const c
         ESP_APPTRACE_LOGE("Trace destinations other then TRAX are not supported yet!");
         return ESP_ERR_NOT_SUPPORTED;
     }
+    if (fmt == NULL) {
+        return ESP_ERR_INVALID_ARG;
+    }
 
     esp_apptrace_tmo_init(&tmo, user_tmo);
     ESP_APPTRACE_LOGD("fmt %x", fmt);
@@ -1101,6 +1115,9 @@ uint8_t *esp_apptrace_buffer_get(esp_apptrace_dest_t dest, uint32_t size, uint32
         ESP_APPTRACE_LOGE("Trace destinations other then TRAX are not supported yet!");
         return NULL;
     }
+    if (size == 0) {
+        return NULL;
+    }
 
     esp_apptrace_tmo_init(&tmo, user_tmo);
     return hw->get_up_buffer(size, &tmo);
@@ -1122,6 +1139,9 @@ esp_err_t esp_apptrace_buffer_put(esp_apptrace_dest_t dest, uint8_t *ptr, uint32
         ESP_APPTRACE_LOGE("Trace destinations other then TRAX are not supported yet!");
         return ESP_ERR_NOT_SUPPORTED;
     }
+    if (ptr == NULL) {
+        return ESP_ERR_INVALID_ARG;
+    }
 
     esp_apptrace_tmo_init(&tmo, user_tmo);
     return hw->put_up_buffer(ptr, &tmo);
diff --git a/components/app_trace/host_file_io.c b/components/app_trace/host_file_io.c
index b81844014..b59b837aa 100644
--- a/components/app_trace/host_file_io.c
+++ b/components/app_trace/host_file_io.c
@@ -145,6 +145,9 @@ void *esp_apptrace_fopen(esp_apptrace_dest_t dest, const char *path, const char
     esp_apptrace_fopen_args_t cmd_args;
 
     ESP_EARLY_LOGV(TAG, "esp_apptrace_fopen '%s' '%s'", path, mode);
+    if (path == NULL || mode == NULL) {
+        return 0;        
+    }
 
     cmd_args.path = path;
     cmd_args.path_len = strlen(path) + 1;
@@ -213,6 +216,10 @@ size_t esp_apptrace_fwrite(esp_apptrace_dest_t dest, const void *ptr, size_t siz
 
     ESP_EARLY_LOGV(TAG, "esp_apptrace_fwrite f %p l %d", stream, size*nmemb);
 
+    if (ptr == NULL) {
+        return 0;        
+    }
+
     cmd_args.buf = (void *)ptr;
     cmd_args.size = size * nmemb;
     cmd_args.file = stream;
@@ -248,6 +255,10 @@ size_t esp_apptrace_fread(esp_apptrace_dest_t dest, void *ptr, size_t size, size
 
     ESP_EARLY_LOGV(TAG, "esp_apptrace_fread f %p l %d", stream, size*nmemb);
 
+    if (ptr == NULL) {
+        return 0;        
+    }
+
     cmd_args.size = size * nmemb;
     cmd_args.file = stream;
     esp_err_t ret = esp_apptrace_file_cmd_send(dest, ESP_APPTRACE_FILE_CMD_FREAD, esp_apptrace_fread_args_prepare,