this post was submitted on 18 Dec 2023
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The rabbit hole of unsafe Rust bugs – notgull – The world's number one source of notgull (notgull.net)
submitted 10 months ago by snaggen to c/rust
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[–] [email protected] 5 points 10 months ago

I believe you are correct; if the unsafe code can cause undefined behavior if input data is not following a specific contract, then the entire function should be labeled unsafe so the caller knows that.

The other option is to check to make sure the contract is valid, and return an error or panic if it is not. That function would be sound, as no inputs cause undefined behavior.