Marshall Pierce

@[email protected]
20 Followers
244 Following
92 Posts
Software & security
Marshall PierceMar 17
Ritesh Oedayrajsingh VarmaMar 17

New article! A user *cough* @aras *cough* is reporting full system freezes while using Superluminal on Linux. What do you do? Cry? Well, we did a little bit.

But we also dove into the kernel...again, this time finding & fixing several issues in eBPF's spinlock implementation. Read all about it:

https://rovarma.com/articles/a-tale-about-fixing-ebpf-spinlock-issues-in-the-linux-kernel/

A tale about fixing eBPF spinlock issues in the Linux kernel | Ritesh Oedayrajsingh Varma

A system freeze led us deep into Linux spinlock internals, where we helped find not one but three bugs in the kernel's resilient locking code used by eBPF.

Show threadMarshall PierceJan 24
@cliffle ah well. Hopefully the ecosystem will figure it out. In the mean time perhaps abusing rayon to iterate over messages from the channel might be easy, if not elegant?
Show threadMarshall PierceJan 23
@cliffle caniuse.com indicates threads are pretty well supported. Or, commit crimes handing buffers back and forth between web workers, which I did some time ago squishing a logo impl into wasm.
Show threadMarshall PierceNov 27
@arclight Perhaps an RPi running Kodi via OSMC or similar is what you’re after.
Show threadMarshall PierceNov 19

@neilmadden Thus leading to the following : https://docs.oracle.com/javase/specs/jls/se7/html/jls-5.html

The behavior on signed bytes is … interesting.

Chapter 5. Conversions and Promotions

Show threadMarshall PierceOct 15
@sophieschmieg but can the benefits of training a promising junior dev justify a trillion dollars of capex? 🤪
Show threadMarshall PierceOct 2, 2025
@lcamtuf this seems like a job for FUSE
Marshall PierceSep 30, 2025
@lcamtuf I just wanted to see how it handled overflow of the displayable max number
Show threadMarshall PierceSep 30, 2025
@nrc pretty much anything that mutates Vec can panic due to allocation failure. Probably other collections are similar.
Show threadMarshall PierceSep 14, 2025
@lcamtuf if it’s still exposed, consider adding foil tape to indicate buried power? Unfortunately I couldn’t find it in lengths less than about a parsec last time I needed some.