Who’s Mark Mossberg?

I’m an engineer living in Berlin, where I work on software for musical instruments at Ableton. I previously worked in Infosec, on emulators, operating systems, and compilers. I found a memory corruption bug in LLDB once and also have a small patch in the Linux kernel.

I also produce music. (And have been for longer than I’ve been programming). I used to make metal, but now make wave and did a one-off emo EP once.

In 2020, I took a gap year and created Timestamps, a workflow product for DJs, which I grew to a humble $50 MRR before making it free. I then spent the fall working at a fast food restaurant. I also discovered an interest in writing during this time, which is when I wrote many of the posts on this blog.


Open Source

  • file(1) – Reported ELF coredump parsing bug
  • Linux man-pages – Reported undocumented inaccuracy in /proc memory statistics
  • Linux Kernel – Discovered & patched misleading error logging during OOM conditions
  • LLDB – Discovered & patched memory corruption bug in “finish” command
  • osquery – Significant improvements to coverage of local certificate stores on Windows (via Trail of Bits)
  • DMTCP – Implemented filesystem path virtualization for checkpointed applications

Public Speaking

Academic Papers

  • ASE 2019: “Manticore: A User-Friendly Symbolic Execution Framework for Binaries and Smart Contracts”

Press

  • HYPEBEAST covered the release of “DANGER” which I produced for YAOKAI & Sleet Mage.

Projects