c
struct hci_dev { 
  // ... other fields ...
  int data_length;
  int buffer_size;   // Add a field to track the actual buffer size
  uint8_t *data_buffer;
};

static void qca_tlv_check_data(struct hci_dev *hdev, ...) {
  // ... other code ... 

  if (hdev->data_length >= 0 && hdev->data_length <= hdev->buffer_size) {
    // Safe to access data
    // ... process data ... 
  } else {
    // Handle error 
  }

  // ... rest of the function ... 
}
