[$] The difficulty of safe path traversal

Aleksa Sarai, as the maintainer of therunc container runtime, faces aconstant battle against security problems. Recently, runc has seenanotherinstance of a security vulnerability that can be traced back to the difficultyof handling file paths on Linux. Sarai spoke at the 2025Linux Plumbers Conference(slides;video)aboutsome of the problems runc has had with path-traversal vulnerabilities, and toask people to please uselibpathrs, the library that he has been developing forsafe path traversal.