About Me

Woojin Ji / 지우진

  • A university student in South Korea
  • Job hunting with the goal of becoming a kernel developer
  • I used to study systems hacking, mostly pwn, and was a DEFCON 33 Finalist

Interests

  • eBPF
  • Linux kernel
  • How BPF works internally
  • Reading kernel code
  • Following mailing lists

I still care about security, but these days kernel work is just more fun.

This blog is for

  • eBPF-related kernel code analysis
  • Notes on kernel mailing lists
  • Study logs on BPF and the kernel
  • Write-ups on patches I send and future contributions

I run this blog mostly to write things down in my own words, so I do not end up pretending I understood something after skimming it once.

What I have been working on

  • Systems hacking, especially pwn
  • Not just solving things, but digging into why they break and why they work
  • Getting pulled deeper into the kernel through eBPF
  • Preferring code and internal flow over surface-level usage
  • I have sent patch mail to the kernel before, though it ended up being marked as duplicate and was not merged

In short, I tend to care more about how things work underneath than how nice the interface looks from above.

How I work

I barely use GitHub.

Most of my work lives on a self-hosted private Git server, so judging my activity by GitHub alone would be a little misleading.

Contact

Goal

To become someone who can send kernel patches without feeling out of place.

Still learning, but I am at least keeping a log of how far I have dug.