Posts
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Following
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Followers
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Linux Kernel security developer, working for Microsoft. Also W7TXT. Views are my own.
Topics: #Linux #kernel #security, #amateurradio, #RF, #hamradio, #electronics, #science, #radioastronomy, #physics, #space, #arduino.

📡 https://w7txt.net/
🐧 https://blog.namei.org/
☠️ https://www.facebook.com/w7txt
jmorris

James Morris

@vilmibm people take it for granted now that you can just click on things, but it took decades for the idea to take hold & become ubiquitous. Most of it was utterly awful until the web came along.

RE: https://tiny.tilde.website/@vilmibm/115177383467463329
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jmorris

James Morris

Edited 3 days ago
Interesting paper: "Enter, Exit, Page Fault, Leak: Testing Isolation Boundaries for Microarchitectural Leaks"

https://www.microsoft.com/en-us/research/publication/enter-exit-page-fault-leak-testing-isolation-boundaries-for-microarchitectural-leaks/

"We found 4 new cross-domain leaks, successfully detected all 6 known leaks possible in the configurations that we tested and reproduced 6 known flaws in patches."

e.g.:

"We discovered a microarchitectural effect on AMD3 that allows an attacker VM to selectively infer any bit from the memory of another VM, provided the victim VM has previously accessed (i.e., cached) this bit. By repeatedly exploiting this effect, the attacker VM could read the victim’s memory one bit at a time, and thus learn the contents of an arbitrary memory range used by the victim. "
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jmorris
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LinuxSecSummit

Linux Security Summit 🐧

📢 🐧 The videos from LSS-EU 🇪🇺 2025 in Amsterdam 🇳🇱 are now up!

📺 Here is the playlist:

https://youtube.com/playlist?list=PLbzoR-pLrL6rSxIlgQx8OYw74Az63TpaB&si=6DEbDaY4GJMtIH1m
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jmorris

James Morris

Reply to @fustini
@fustini @kicad feel free to point out any issues if you see them.
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jmorris

James Morris

Learning KiCAD.



@kicad
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jmorris
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pid_eins@mastodon.social

Lennart Poettering

Edited 13 days ago

4️⃣9️⃣ Here's the 49th post highlighting key new features of the upcoming v258 release of systemd.

One of the key features of systemd from day 1 on is socket activation, i.e. a mechanism where systemd binds sockets on behalf of services, watches them and only activates the services themselves later, possibly only at the moment they are actively used.

This has various benefits, for example reduces ahead of time cost of running a large number of services (which improves boot times).

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jmorris

James Morris

Reply to @pdp7@fosstodon.org
@pdp7 coming to LSS-EU?
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jmorris
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allsystemsgo@fosstodon.org

All Systems Go!

📣 Reminder: Ticket prices go up in a few days for All Systems Go! 2025, the foundational user-space Linux technologies event in Berlin.
🎟️ Get yours today @ https://ti.to/all-systems-go/all-systems-go-2025
ℹ️ And more info @ https://all-systems-go.io/

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jmorris
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LinuxSecSummit

Linux Security Summit 🐧

LSS-EU kicks off today in Amsterdam, with conference chair Elena Reshetova presenting opening remarks.

https://lsseu2025.sched.com/list/simple
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jmorris

James Morris

Reply to @jmorris
Answer: Foam photography museum in Amsterdam.
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jmorris

James Morris

Reply to @Gina@fosstodon.org
@Gina yes, or you could replace the wires in that connector with longer ones. Looks like 240v? That is potentially deadly, FYI.
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jmorris

James Morris

Where am I? Wrong answers welcome.
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jmorris

James Morris

Got addicted to Severance on a recent flight, but I need to subscribe to 🍏 tv to see the full season now. This dystopia is getting very ~meta~ blobcatchefskiss
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jmorris

James Morris

Reply to @MLE_online@social.afront.org
@MLE_online should drown out the screaming for a while?
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jmorris

James Morris

Reply to @securepaul@hachyderm.io
@jann @securepaul yep, it was hit by spam bots and I haven’t had time to clean it up.
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jmorris
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l0kod@mastodon.social

Mickaël Salaün

Edited 1 month ago

AI agents can potentially gain extensive access to user data, and even write or execute arbitrary code.

OpenAI Codex CLI uses sandboxing to reduce the risk of buggy or malicious commands: https://github.com/openai/codex/pull/763

For now, it only blocks arbitrary file changes, but there’s room to strengthen protections further, and the ongoing rewrite in will help: https://github.com/openai/codex/pull/629

Landlock is designed for exactly this kind of use case, providing unprivileged and flexible access control.

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jmorris

James Morris

Reply to
@Geojoek no point wasting power if the signal only needs to go in a particular direction
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jmorris

James Morris

Reply to
@HopelessDemigod @brhfl is that legal?
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jmorris

James Morris

Reply to @brauner@mastodon.social
@brauner @jann How so?
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jmorris

James Morris

Reply to @david_chisnall@infosec.exchange
@david_chisnall @bradley @DavyJones also, the LLM you're using for all this might be compromised.
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