What is Hackers' Pub?

Hackers' Pub is a place for software engineers to share their knowledge and experience with each other. It's also an ActivityPub-enabled social network, so you can follow your favorite hackers in the fediverse and get their latest posts in your feed.

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An important PSA for people who are active on and who, upon hearing that the ICE account was officially verified, are saying: "I will just block it."

Blocking on Bluesky is NOT PRIVATE: it's very easy to see who is blocking any account by visiting sites that list that information.

I took a screenshot from clearsky.app, listing all the accounts that are blocking ICE (I pixelated avatars and usernames for privacy purposes).

The safest bet is to mute (that info is private) 😫

a screenshot of the site ClearSky updating in real time the Bluesky accounts that are blocking ICE. The page reads "U.S. immigration and customs enforcement" blocked by 72233 (accounts) with the date of the block... some seconds ago
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데리다의 그램과 흔적에 관한 문제계는 STS의 기술적 각본, 각인의 문제계와 꽤 잘 공명하는 교역지대가 있는듯 하다 그런 맥락에서 베르나르 스티글레르 등의 작업이 그램화, 인지적 프롤레타리아화 같은 개념의 망을 통해 2010년대의 기술 미디어 연구에 데리다나 라캉의 문제계를 접속시켜 주었던 것이고

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A glimpse into what a kernel engineer debugs for enterprise customers.

A bank is running a "security" solution that installs kprobes to intercept, among other things, calls to do_execveat_common(), and monitors all the arguments that could have been passed to execveat(). As do_execveat_common() can be triggered not only by userspace, but also by call_usermodehelper_exec(), a kprobe crafted with poor assumptions may result in an erroneous double dereference of what it thinks points to argv**, causing a General Protection Fault.

The kernel is not dumb however. If a GPF is triggered by a kprobe, it is handled gracefully, and nothing happens, and kprobe just returns a safe value. For a GPF to be triggered however, the CPU has to really try to read the wrong memory address first. The address is pretty random each time, meaning it can point to memory regions that are not mapped by kernel, but have some special meaning for a platform.

Enter the platform. It is configured by the hardware vendor in such a way that if an unaligned access to an MMIO region happens, an MCE is generated. And it is not some MCE for a correctable error, but an MCE indicating process context corruption, in other words, it's fatal. So, once it happens, the system dies with a kernel panic.

And this is exactly what the customer experienced. A socket() syscall caused modprobe to be invoked via call_usermodehelper_exec() → do_execveat_common() chain to load the ipv6 module. This triggered a kprobe that dereferenced wrong memory pointer twice provoking a GPF. The kernel began to gracefully handle the GPF, but the platform saw that the second dereference resulted in accessing the MMIO region, and this was an unaligned access, hence the platform threw MCE. And the system died.

It was fun to investigate this and to explain to the customer that three legitimate things in their system being hit together can trigger a crash.

And of course we joked we should have moved the whole case to the networking team, because it's always IPv6.

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"Nimm einen Direktzug, haben sie gesagt. Da ist alles einfacher, haben sie gesagt".

Deutsche Bahn: Nope!

Der Leyrer strandet jetzt mal in Frankfurt (Main) und darf sich einen neuen Zug suchen.

OIDA!

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In exactly one month my debut novel, , will publish!
And one month after that, will complete the duology. 🥹

I am a little nervous, but mostly extremely excited!
This has been a long time coming, and I think it'll be bitter-sweet to be done with this story. To say goodbye to the characters
I hope others may enjoy the story as well.

You can pre-order the ebook now, and I'll get the paperback approved and up soon.
books2read.com/fatesalight

A promo/informational image for my upcoming book.
The background is dark blue with light blue crackly lines.
All the text in the image is a deep yellow.

In the center, an image of a book: Dark blue cover with blue and yellow flames on either side. A large blue gem in the middle with the silhouette of a couple holding hands in the gem. Big yellow letters above and below the gem reading FATES ALIGHT

At the top of the image: A Young- to New-Adult Romantic Fantasy.
Part 1 of a completed duology
And at the bottom of the image:
February 17th 2026

Around the book with squiggly arrows pointing at the cover: 
- Dual POV
- Childhood Best Friends*
	- * It's complicated 
- Strong, capable Female MC (also cinnamon-roll)
- Cinnamon-roll Male MC (also capable)
- Flying monsters (not dragons)
- Pirates
- (mostly) Mature, adult characters
- Magic (elemental with a twist)
- No (major) cliffhanger ending
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When designing Loops federation, I came up with a system of Validators, Handlers and Builders for each type of activity.

I borrowed this from my WIP Laravel ActivityPub library, and it leverages a simple activityMap to handle incoming activities by first validating them, then handling them in a clean and clear way

I will be abstracting this to the Laravel ActivityPub library to make it easier for laravel devs to add ActivityPub support, and will be using it in Pixelfed

github.com/joinloops/loops-ser

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:blob_vocal:ぼくはムキムキ♪ダンスベイビー
ほらこれみておしりをフリフリ
スーパーベイビーはパンチもすごい
おしりにパンチ それムキムキパンチ
わるいやつは ゆるさない⤴︎
:blobcat_sing:

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My husband and I are not "two people who have a pet cat." No.

She is not his pet, he is, I think her legal advocate.

"My client is registering a formal complaint about the lateness of breakfast."

"My client may start formal proceedings against you if this healthy low protein diet program continues."

"I do not know the current location of my client, but I would point out that for this hearing such information is not within the rights of the court."

Does she pay him? How?

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バターというトリッカルをサ終させようとしてるキャラがいる​:angry_shibe:

またトリッカルは続編であり、前作は人気低迷でサ終したが代表が自宅を担保に開発費を捻出したことで
:mochihoppe:が生まれる

なおキャラは指4本であり、主人公(教主)だけ指5本である
主人公が指5本を動かすのを見て、教主は指を5本も動かさないといけないのが可哀想と泣くキャラもいる


RE: https://misskey.io/notes/ahlwk2x73nzs09m4

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❗ 도움을 청합니다 ❗ 가격대가 적당해보이는 노트북을 찾아서 중요하게 생각하는 사양을 정리해봤는데 스라 여러분의 추천을 받고 싶습니다. 표에 없는 제품도 환영합니다. 저는 소프트웨어 전공이라서 하드웨어는 그렇게 잘 알지 못합니다...🥲 www.notion.so/eatchangmyeo... 🧵

RE: https://bsky.app/profile/did:plc:ppk763j7o2wkinvzuqx4orrb/post/3mbhfi4hvd22p

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okay, you + @styfle.dev@bsky.brid.gy have nerd-sniped me. I've added on-demand runtime discovery to cover the gap 👉 if the _newest_ post can't find a bsky post, we add some code to discover it automatically at runtime ... ... but, if the newest post is already shared on bluesky, we save those (few) kb! 🔥

feat: implement runtime discov...

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okay, you + @styfle.dev@bsky.brid.gy have nerd-sniped me. I've added on-demand runtime discovery to cover the gap 👉 if the _newest_ post can't find a bsky post, we add some code to discover it automatically at runtime ... ... but, if the newest post is already shared on bluesky, we save those (few) kb! 🔥

feat: implement runtime discov...

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バターというトリッカルをサ終させようとしてるキャラがいる​:angry_shibe:

またトリッカルは続編であり、前作は人気低迷でサ終したが代表が自宅を担保に開発費を捻出したことで
:mochihoppe:が生まれる

なおキャラは指4本であり、主人公(教主)だけ指5本である
主人公が指5本を動かすのを見て、教主は指を5本も動かさないといけないのが可哀想と泣くキャラもいる


RE: https://misskey.io/notes/ahlwk2x73nzs09m4

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It really bothers me when bigger accounts lift content from other accounts and don't credit. Like who's that for? Why not just boost the original to all the people who follow you instead of cutting off the legs of someone in your own community. Such a dick move. Fedi is about all of us and about lifting one another up. This ain't fuckn Bluesky or Twitter. If you're just after clout, go chase it somewhere else.

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