2023-09-13, 17:00–17:25 (Europe/Berlin), Dome
A walkthrough of an interesting use case for the
FICLONE ioctl: cloning file data into a tar archive, and cloning files out of it again. "Free" archiving and unarchiving at zero-copy speeds!
- Copy-on-write and the
- The ancient
- A trick for adding arbitrary padding to the
tarformat in order to force file system page alignment
- How to avoid symlink attacks and other TOCTOU issues, using the fairly recently introduced (linux 5.6)
- An interesting bug in GNU tar
At the end you'll receive a free autographed copy of deduptar to use for party tricks. 🥳
Computer forensic investigator turned software engineer.
I enjoy looking under the hood of pretty much anything.
Currently working as a backend engineer with Django+PostgreSQL, plus Android app development, network engineering, and any odd-size problems that come my way thrown in.