Description
The final Rust warm-up simply asks you to call an unsafe helper correctly by wrapping the FFI-style function in an `unsafe` block so the compiler agrees to execute it.
Extract the archive, enter the project directory, and run `cargo run` to see the compiler warning about unsafe code.
Open `src/main.rs` to inspect the commented hints around the unsafe block.
tar -xvf fixme3.tar.gz && cd fixme3
cargo run
Solution
- Step 1Wrap the unsafe callUncomment the `unsafe { ... }` block (lines 22 and 34) so the compiler allows the call into the unsafe helper. No other code changes are needed.
- Step 2Rebuild and runRe-run `cargo run` and the binary now prints the picoCTF flag immediately.
Flag
picoCTF{n0w_y0uv3_f1x3d_1h3m_...}
Rust requires explicit `unsafe` blocks around code that might violate safety guarantees, even when the code was provided by the challenge.