Backtrace

Tag: kernel

Performance Improvements for FreeBSD kernel debugging

We previously explored FreeBSD userspace coredumps. Backtrace’s debugging platform supports FreeBSD kernel coredumps too, and their traces share many features. They are constructed somewhat differently, and in the process of adding support for them, we found a way to improve performance for automated programs accessing them. Read on to learn how information is extracted from… Read More

Exploiting ELF Expansion Variables

ELF security is somewhat esoteric, and the related vulnerabilities are often very interesting. Today we will be discussing a security issue that lives within the ELF loading code of unpatched IllumOS kernels, and is not specific to any given architecture. The vulnerability may very likely extend to other operating systems which support ELF, and have… Read More