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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


pathological enshittification achieved

RE: https://hachyderm.io/@molly0xfff/113539381334735295
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1️⃣9️⃣ Here's the 19th post highlighting key new features of the upcoming v257 release of systemd.

A relatively basic feature of systemd's service management is the ability to automatically restart a service in case it terminates unexpectedly, configurable via the Restart= setting.

In v254 we added the RestartMode= setting that allows to fine tune the mechanism to use for restarting the service, i.e. it adds a logic to optionally avoid marking the service as failed between…

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@spacetelescope definitely worth clicking through: the image holds a second discovery that’s easier to overlook. Examine the white elliptical galaxy at left. A faint red arc appears in the inset at 10 o’clock. This is a very distant galaxy whose light is bent by the gravity of the elliptical foreground galaxy – and its appearance is duplicated. The stretched red arc is warped where it reappears – as a dot – at 4 o’clock. These images of the lensed galaxy are so faint and so red that they went unrecognized in Hubble data, but are unmistakable in Webb’s near-infrared image.

RE: https://astrodon.social/@spacetelescope/113568009758709150

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I've been seeing slow downloads from #Fedora mirrors yesterday & today, pretty sure my Internet connection is ok. Anyone else seeing this?
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8️⃣ Here's the 8th post highlighting key new features of the upcoming v257 release of systemd.

A longer time ago systemd introduced JSON based user records as an extension of classic UNIX `struct passwd`. These records can be provided via Varlink IPC or via drop-in files. The much richer set of account settings is documented here:

https://systemd.io/USER_RECORD/

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Had fun in at in Tokyo yesterday demonstrating a TPM interposer attack obtaining the systemd cryptenroll boot keys

https://sched.co/1jKCe

And also explaining how the new Linux Kernel TPM patches can help defeat this

For those who asked, my python3 interposer designed to steal the keys is here:

https://git.kernel.org/pub/scm/linux/kernel/git/jejb/tpm2-interposer.git/

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@n6utc that is the minimum number of antennas a vehicle should have

RE: https://mastodon.radio/@n6utc/113403164147476662
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Just learned about gnome-kiosk (via the particleos repo): https://gitlab.gnome.org/GNOME/gnome-kiosk
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Adding uchar.h to picolibc today. Instead of providing useful conversions between UTF-8, UTF-16 and UTF-32, all C23 provides is conversions between those and the awful "multibyte" representations. I can understand why they'd *also* want to connect UTF encodings to the legacy C APIs, but the most important thing we need is a way to validate UTF-8 input which has some pretty tricky corner cases involving missing bytes, overlong encodings, and surrogates. https://github.com/picolibc/picolibc/pull/861

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Imagine the world today if Google did not kill blogging. Would it be different?
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Edited 1 month ago
10 GHz beacon testing around Seattle on the weekend. Frank AG6QV (https://ag6qv.com/Blog/uhrc) was able to receive via reflection from Puget Sound ferries. Now thinking about a proper mobile-mounted setup for quick 2-way contacts.

https://youtube.com/shorts/n0ZXhANwGXc?feature=share

#hamradio #amateurradio #microwave
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6m (50 MHz) FT8 over the past 15 minutes on pskreporter.info, strong TEP (transequatorial propagation)


#vhf #ft8 #hamradio #amateurradio #6m
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Calibrating the PID controller of a DIY reflow hot plate. Mistakes were made.
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The lack of threading here is diabolical.
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Hi folks, I've just posted an edited version of one of the presentations I gave remotely at Microwave Update 2024 Vancouver. It's about some of the techniques I've been experimenting with for manufacturing antennas and feeds now I have a tame 5000-pound killer robot in my workshop, otherwise known as a SYIL X5 CNC mill.
https://youtu.be/ZDQyhEpxXmA

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Linux Security Summit 🐧

Edited 1 month ago
📢 Videos from Linux Security Summit Europe 2024 (LSS-EU) are up:

https://www.youtube.com/watch?v=S1r94G8yJMs&list=PLbzoR-pLrL6pXwGwbAmhi3DgsaPKJTLde
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