Wanted to download an ISO, ended up writing a kernel exploit
Summary
A detailed, first-person writeup about diagnosing and exploiting a DMA/cache coherence bug on a TP-Link EAP770 v1 Wi‑Fi access point. The author shows how offload features can corrupt large downloads, traces the root cause to Qualcomm’s SFE/PPE offload and a DMA bug, and uses CVE-2022-0185 to craft an exploit chain to gain root, while noting that disabling the offload fixes the issue at the expense of performance.