Jonathan Gray - Developer at OpenBSD

Jonathan Gray

Developer at OpenBSD

Greater Melbourne Area Australia

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Summary

👤

Senior

🎓

Top School

Jonathan Gray is a seasoned developer with 33 years of experience specializing in OpenBSD kernel and userspace programming, device drivers, and reliable systems with openly documented interfaces. Based in Greater Melbourne, he has been a long-term contributor to the OpenBSD project since 2004 and has driven multiple DRM/KMS ports, bringing Linux graphics subsystems to OpenBSD and advancing Mesa/LLVM userspace support. His open-source security work includes vulnerability fixes for the widely used OpenSSH portable codebase, and he has improved portability and build systems for projects like the GLSL optimizer once used in Unity. Jonathan combines low-level systems expertise with release engineering and build-infrastructure experience across commercial and open-source environments, and he has a track record of making system software both more secure and more portable.

33 years of coding experience

14 years of employment as a software developer

Computer Science, Computer Science at La Trobe University

Github Skills (20)

debug10

vulnerability10

architecture10

memory-management10

glsl10

c1110

openbsd10

automake10

security10

c1710

system10

cryptography10

compile10

compiler10

vulnerabilities10

Programming languages (7)

C++CMakefileM4PHPHTMLAssembly

Github contributions (5)

openssh/openssh-portable

Feb 2020 - Oct 2022

Portable OpenSSH

Role in this project:

Security Engineer

Contributions:8 commits in 2 years 8 months

Contributions summary:Jonathan's contributions primarily focus on fixing vulnerabilities and addressing potential security issues within the OpenSSH codebase. They identified and corrected memory leaks in various error paths, resolved issues that could lead to crashes via fuzzing, and addressed vulnerabilities by reintroducing crucial code sections. Moreover, the user's involvement included fixing potential incorrect precedence in code, which could impact security.

cryptographykeychainsecuritysshfile-sharing

aras-p/glsl-optimizer

Mar 2014 - Sep 2014

GLSL optimizer based on Mesa's GLSL compiler. Used to be used in Unity for mobile shader optimization.

Role in this project:

System Architect / Software Architect

Contributions:16 commits in 6 months

Contributions summary:Jonathan primarily focused on improving the compatibility of the GLSL optimizer with different operating systems, particularly OpenBSD. Their contributions involved modifying build configurations to avoid issues with OpenBSD's specific design, such as the lack of DT_NEEDED entries for libc and the handling of device paths. They also corrected build processes and simplified code to be more portable.

metalshadersoptimizationgame-developmentcompiler

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