libFuzzer has functions that can be implemented by the end-user like this:
size_t LLVMFuzzerCustomMutator(
uint8_t* data, size_t size, size_t max_size, unsigned int seed)
Am I free to sometimes insert some bytes in data thereby making it larger; I assume max_size may not be exceeded? If I needed more bytes than max_bytes to perform the necessary insertion how would I do that? Do I return the new size?