HITCON CTF 2020 — Linux kernel tasks

There were two kernel-related tasks: spark and atoms. spark required exploiting a memory corruption (see the writeups). atoms required causing a soft lockup and triggering the watchdog.

Sources and solutions: https://github.com/david942j/ctf-writeups/tree/master/hitcon-2020/
Mini-writeup and exploit for spark #1: https://github.com/BrieflyX/ctf-pwns/tree/master/kernel/spark
Mini-writeup (at the end) and exploit for spark #2: https://gist.github.com/sampritipanda/9fb8f1f92aef6591246e74ed5847c910