dxjones

Computational Expert, Entrepreneur, Visual Neuroscientist, Algorithmic Artist

[0xor0ne @0xor0ne]

Single-stepping attack on TrustZone-M via interrupt-latency leakage (Usenix paper)

https://t.co/Y1e8PRK18s

#infosec

[dxjones @dxjones]

floor(x) is the greatest integer less than OR EQUAL TO x

[Andrzej Kukla @Mathinity_]

The floor strikes again, in this 5 years old open* problem 🗿 have fun solving it! NYEH HEH HEH!

* there is nothing open about this problem, I’m just kidding. In fact, even the set of solutions isn’t open.

[Clandestine @akaclandestine]

#bot

[remy🐀 @_mattata]

My IP was too clean on https://t.co/j9MJwKtzz9, they wouldn’t let me hang with the console cowboys in cyberspace, so I bought this pre-infected android TV box at Walmart for black Friday to join a residential IP botnet that’s whitelabeled and used by commercial AI data scrapers

[dxjones @dxjones]

Root cause was a bug in newish Rust code. The larger config file merely triggered that bug. Don’t blame the input. The Rust code should have handled it gracefully.

[Florian Roth ⚡️ @cyb3rops]

Cloudflare went down because a ClickHouse change made a metadata query return duplicate columns. That blew up the size of a config file, it spread across the network and one module couldn’t handle the larger file and crashed. Everything after that was basically fallout from this chain reaction 😅

https://t.co/R4IPMw05ig

[dxjones @dxjones]

… and what if the file does not exist? Needs proper error handling.

[trish @TrisH0x2A]

File Stats with Syscall

Get detailed file information using stat syscall:

[dxjones @dxjones]

no error checking

[trish @TrisH0x2A]

File Copy with Syscalls

no stdio, using direct kernel calls:

[Wayne Blake @GlamaWayne]

THE BLUE JAYS DID IT!!💙💙💙
#WorldSeries @BlueJays

[OwnersBox @OwnersBox]

THE BLUE JAYS ARE HEADED TO THE WORLD SERIES 🔥🔥🔥

[Toronto Star @TorontoStar]

Blue Jays beat Mariners 6-2 to force Game 7 in ALCS https://t.co/RtcVn6TjzT

[dog @Dog__Dog0]

BRUTUS is 14 and can't get around like he used to. But he was adopted all the same and is living the good life now.

[The Wolf Man @iTheWolfman]

🤣🤣🤣

[Owen @kostekcanu]

OH MY GOD VICTORIA MBOKO 🔥

[dxjones @dxjones]

Mboko 🇨🇦

[dxjones @dxjones]

Mboko 🇨🇦

[dxjones @dxjones]

Your display has 5 rows of dots moving right, 5 rows moving left, etc. CM5 display in Jurassic Park simulated two sheets of dots moving across each other, with dot patterns combined using “OR”. Each row had a pattern of dots moving right, and another pattern of dots moving left.

[Dave W Plummer @davepl1968]

Remember the Thinking Machines CM5 in the background of Jurassic Park? I wanted to copy the CM5 LED effect for my VAX, so I reached out to one of the original designers, Tamiko.

He said that Thinking Machines' president, Sheryl Handler, had asked if the CM lights could be made to blink in a "Random and Pleasing manner". Apparently, Don Aronson wrote the R&P effect for the CM-2, but I'm still waiting to hear back from him!

In the meantime, I did my best take based on what you see in the movie...

[dxjones @dxjones]

There’s no reason to assign ptr=NULL on Line 17 just before return.

[reaperai @reaperaix]

Safe Pointer Handling in C (Easy)

Null pointer dereferences are a classic C gotcha, killing your program if you don’t watch out.
Always initialize pointers to NULL and check them before use. Here’s a tight, secure C snippet to handle pointers like a pro, keeping crashes at bay.

[Justin Tunney @jartine]

1/ The most powerful hacker in the world right now is femboy·cat who is able to control 5% of Internet hosts, making them the all-time champion of the IPv4 Games.

[pikuma.com @pikuma]

This IOCCC winner entry (International Obfuscated C Code Contest) made me smile. The code draws the current moon phase to the console.