Linux Kernel Journey

Nov 12, 2024 · Operations

eBPF Talk: Fixing a 7‑Year‑Old Bug in bpftool

The article details how a long‑standing bug that displayed incorrect call‑address information in bpftool’s JIT disassembly was reproduced, analyzed, and fixed by correcting the PC parameter to use the function’s kernel symbol address, with patches applied to both LLVM and libbfd back‑ends.