Where does arena allocator fail, when it comes to memory safety?

I’ve recently come across arena allocator, and I can already see how they are a big improvement to the standard heap allocator present in C.

What are the other areas it fails to address, when it comes to memory safety?

CameronDev , 3 months ago

Is this homework?

One possible example I can think of, is if there is a struct of a known size, and you want to find it, you can allocate a block of the same size, and get a ptr that is near it?

Also, if you know of a function vulnerable to buffer overruns, you can place data near the input for a given buffer as long as you know its size and therefore control what the vulnerable function reads.,

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