Ai - Category - Rivit's bloghttps://rivit.dev/categories/ai/Ai - Category - Rivit's blogHugo -- gohugo.ioenWed, 01 Apr 2026 12:00:00 +0000Fuzzing libfyamlhttps://rivit.dev/posts/fuzzing-libfyaml/Wed, 01 Apr 2026 12:00:00 +0000Rivithttps://rivit.dev/posts/fuzzing-libfyaml/I spent some time fuzzing libfyaml, a feature-rich YAML parser/emitter written in C. The first campaign ended with 68 reported bugs, all of which were fixed by the maintainer. I kept going after that, and the approach changed a lot - see the update at the end of the article.

libfyaml is a YAML library that supports YAML 1.2. It provides a pretty extensive API - parsing, emitting, path expressions, document manipulation, a reflection/type system, and more. It’s written in C, which makes it a great candidate for fuzzing with sanitizers.

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