No, it's just a bit of defensive programming against silliness and misconfiguration. Not every errant connection is an attacker trying to pwn you, some are just

No, it's just a bit of defensive programming against silliness and misconfiguration. Not every errant connection is an attacker trying to pwn you, some are just going to be honest mistakes. Picking up on wrong magic numbers and logging "missing magic from <ip>" would help immensely debugging this issue. All the other advice about avoiding mallocing an unsanitised amount of memory still stands, but this would just make it all easier to figure out