# address-sanitizer

> Claude/Codex skill by [@trailofbits](https://omgskills.com/library/trailofbits/index.md) · 8.1k stars · Updated 2026-11-06

Builds and runs code under AddressSanitizer to catch buffer overflows, use-after-free, and other memory errors during fuzzing or tests. Covers -fsanitize=address builds, ASAN\_OPTIONS, reading the crash report, LeakSanitizer, and the overhead and platform trade-offs. Use when fuzzing C/C++ or Rust that has unsafe blocks or FFI, when debugging a memory corruption crash, or when reading an ASan stack trace.

Tags: agent-skills

## Install

```sh
git clone https://github.com/trailofbits/skills /tmp/skills && ln -s /tmp/skills/plugins/testing-handbook-skills/skills/address-sanitizer ~/.claude/skills/address-sanitizer
```

## From README

AddressSanitizer (ASan) AddressSanitizer (ASan) is a widely adopted memory error detection tool used extensively during software testing, particularly fuzzing. It helps detect memory corruption bugs that might otherwise go unnoticed, such as buffer overflows, use-after-free errors, and other memory safety violations. Overview ASan is a standard practice in fuzzing due to its effectiveness in identifying memory vulnerabilities. It instruments code at compile time to track memory allocations and accesses, detecting illegal operations at runtime.

## Links

- HTML page: https://omgskills.com/library/trailofbits/skills/address-sanitizer/
- GitHub: https://github.com/trailofbits/skills
- Author: [@trailofbits](https://omgskills.com/library/trailofbits/index.md)

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