You don't have a buffer overflow problem if you read it in a memory-safe way i.e. read it in chunks and realloc when you reach the size of your allocation.
What you will have is a potential denial-of-service attack - although this one isn't particularly great because there's zero amplification (they might as well just send garbage into your firewall)
What you will have is a potential denial-of-service attack - although this one isn't particularly great because there's zero amplification (they might as well just send garbage into your firewall)