18 hours
A Basil Plant
InfoSec Person | Alt-Account#2
- 3 posts
- 5 comments
Joined 3 years ago
Cake day: September 28th, 2023
You are not logged in. If you use a Fediverse account that is able to follow users, you can follow this user.
I bought a Bill Evans record (Moon Beams - jazz, piano), and another one by a Hungarian jazz pianist: Gonda János - Vonzások És Választások. The stores were Wave Records (the one in this picture) and Soul Cure Records (Google Maps Link). Highly recommend Soul Cure Records if you’re into jazz.
Recently went to Budapest, Hungary and captured it on film. It’s just a beautiful city to walk around (only the cobblestones suck sometimes, but that’s a lot of European cities). Used my Minolta X-700 with Dubblefilm Treat 400 ISO, Dubblefilm 800 ISO, and Cinestill 800 ISO.
I had some issues with one roll though… it got jammed in the first shot and I took 35 subsequent shots thinking I was progressing the film, but I wasn’t. Feel terrible about it since I was really looking forward to the photos of Fisherman’s Bastion.
My other photos are at: https://fotos.snee.la/budapest/
My website’s the one linked in this post: https://snee.la/
My email is at the contact page: https://snee.la/contact/
sneela [at] tugraz [dot] at
I’ll be sure to reach out if I find myself being unable to replicate it.
No worries, and good luck! My email can be found on my website if you want it :D
I wasn’t even talking about tikzplotlib. It’s just that pgf backend is now supported by matplotlib and you can produce pgf files with.
Ah… I’ve think I’ve heard of it, but I never really registered that. Thanks for the info :D
I could give you the tikz source of Fig 2 if you’d like. The patterns and colors of the plots took me almost a day to choose. I wanted to go for a color-blind friendly pallette and keep it looking still snazzy. (https://github.com/simon-pfahler/colorblind)
I’m familiar with matplotlib -> PGFplots (using the Python tikzplotlib library). Unfortunately, I’ve decided against using it for the paper as it produces quite unmanageable outputs. Especially if I rerun experiments + with new data, and later want to change patterns, colors… It was always more of a hassle. I used it for my Master’s thesis.
Instead, Python program -> show plot -> if okay, generate CSV.
In LaTeX, have PGFplot code which reads CSV file and generates the data that way. Much, much easier to maintain.
Thanks for your words!
Yes! We use TikZ for the diagrams, which can be a nightmare sometimes… but it gets better the more I use it.
Regarding the plots, we use PGFplots. I often use matplotlib for quick plots while running experiments, but the paper itself uses PGFplots with the data in a CSV for that sweet, sweet scaling when you zoom in.
7 months
Hi everyone! I’m happy to share that my first first-author paper has been accepted to a conference recently about side-channel attacks on the Linux page cache.
Side-channel attacks on the page cache (first shown in 2019 by my PhD advisor et al.) were thought to have been mitigated since 2019 or thought to be impractical for a long time. Work that I (+my co-authors) did over the past year showed that such attacks were very possible, but also way more severe than initially thought.
It started out with me randomly encountering the cachestat syscall, introduced in kernel 6.5 (2022) to query the state of OS pages in the page cache. After a bit of investigation, we found that it leaks whether pages are in the page cache, including of globally-readable files not owned by that user.
I have a few examples of what attacks are possible on the linked blog post, but the tl;dr is you can detect whether binaries are run (like pkexec, which is the GUI that pops up for password prompts), infer which websites a different local-user visits on Firefox (via the libxul shared library), infer user and system behavior across docker containers, and a few more.
We also found a few more interesting stuff, like the posix_fadvise syscall with the POSIX_FADV_DONTNEED can deterministically remove pages from cache. The other fine grained details are available in the paper: https://snee.la/pdf/pubs/eviction-notice.pdf, but a general write up is in the blog post.
The cachestat vulnerability was assigned CVE-2025-21691 and was fixed by Linus Torvalds himself (first time interacting with him!)
Since I know Lemmy loves Linux (as much as I do, or even more), I thought I’d share it here :D. Feel free to ask any questions if you have any!
There’s also a Github repository of our code which has been peer-reviewed to be reproducible here: https://github.com/isec-tugraz/Eviction-Notice