I would set this to at least 11 because you are using sprintf to create an unsigned integer string (max is 10 digits + 1 zero terminator) and we want to make sure we give sprintf a large enough buf...
I would set this to at least 11 because you are using sprintf to create an unsigned integer string (max is 10 digits + 1 zero terminator) and we want to make sure we give sprintf a large enough buffer to populate - otherwise it will overwrite memory.