- wlug - list.wlug.org.nz

Decentralized Operating System - GRIDNET OS
by john 18 Jul '23

18 Jul '23

This post just arrived at a forum I use, It seems a bit above my pay level. https://www.cybertechhelp.com/showthread.php?p=1312176#post1312176 Cheers John..

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Is Wayland Becoming the Favored Way to Get a GUI on Linux?
by Peter Reutemann 18 Jul '23

18 Jul '23

'The Register shares its collection of "signs that Wayland is becoming the favored way to get a GUI on Linux." - The team developing Linux for Apple Silicon Macs said they didn't have the manpower to work on X.org support. - A year ago, the developers of the Gtk toolkit used by many Linux apps and desktops said that the next version may drop support for X11... - One of the developers of the Budgie desktop, Campbell Jones, recently published a blog post with a wildly controversial title that made The Reg FOSS desk smile: "Wayland is pretty good, actually." He lays out various benefits that Wayland brings to developers, and concludes: "Primarily, what I've learned is that Wayland is actually really well-designed. The writing is on the wall for X, and Wayland really is the future." Partly as a result of this, it looks likely that the next version of the Budgie desktop, Budgie 11, will only support Wayland, completely dropping support for X11. The team point out that this is not such a radical proposition: there was a proposal to make KDE 6 sessions default to Wayland as long ago as last October... - The GNOME spin of Fedora has defaulted to Wayland since version 25 in 2017, and the GNOME flavor of Ubuntu since 21.04. - [T]here's now an experimental effort to get Wayland working on OpenBSD. The effort happened at the recent OpenBSD hackathon in Tallinn, Estonia, and the developer's comments are encouraging. It's already available as part of FreeBSD.' -- source: https://linux.slashdot.org/story/23/07/17/0159246 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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WordPress plugin installed on 1 million+ sites logged plaintext passwords
by Peter Reutemann 17 Jul '23

17 Jul '23

'All-In-One Security, a WordPress security plugin installed on more than 1 million websites, has issued a security update after being caught three weeks ago logging plaintext passwords and storing them in a database accessible to website admins. The passwords were logged when users of a site using the plugin, typically abbreviated as AIOS, logged in, the developer of AIOS said Thursday. The developer said the logging was the result of a bug introduced in May in version 5.1.9. Version 5.2.0 released Thursday fixes the bug and also “deletes the problematic data from the database.” The database was available to people with administrative access to the website.' -- source: https://arstechnica.com/security/2023/07/wordpress-plugin-installed-on-1-mi… Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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AlmaLinux No Longer Aims For 1:1 Compatibility With RHEL
by Peter Reutemann 17 Jul '23

17 Jul '23

'Phoronix: With Red Hat now restricting access to the RHEL source repositories, AlmaLinux and other downstreams that have long provided "community" rebuilds of Red Hat Enterprise Linux with 1:1 compatibility to upstream RHEL have been left sorting out what to do. Benny Vasquez, Chair of the Board for the AlmaLinux OS Foundation, wrote in a blog post yesterday: After much discussion, the AlmaLinux OS Foundation board today has decided to drop the aim to be 1:1 with RHEL. AlmaLinux OS will instead aim to be Application Binary Interface (ABI) compatible*. We will continue to aim to produce an enterprise-grade, long-term distribution of Linux that is aligned and ABI compatible with RHEL in response to our community's needs, to the extent it is possible to do, and such that software that runs on RHEL will run the same on AlmaLinux. For a typical user, this will mean very little change in your use of AlmaLinux. Red Hat-compatible applications will still be able to run on AlmaLinux OS, and your installs of AlmaLinux will continue to receive timely security updates. The most remarkable potential impact of the change is that we will no longer be held to the line of "bug-for-bug compatibility" with Red Hat, and that means that we can now accept bug fixes outside of Red Hat's release cycle. While that means some AlmaLinux OS users may encounter bugs that are not in Red Hat, we may also accept patches for bugs that have not yet been accepted upstream, or shipped downstream." ' -- source: https://linux.slashdot.org/story/23/07/14/215209 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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When Open Becomes Opaque: the Changing Face of Open-Source Hardware Companies
by Peter Reutemann 17 Jul '23

17 Jul '23

'A thoughtful post on the Adafruit Blog chronicles the problems facing open-source hardware companies, and how more and more companies, including Sparkfun, Arduino and Prusa, are becoming more and more proprietary. In Arduino's case, they are deliberately trying to stamp out the clones undercutting them. The new Arduino Pro is not open source in any way, and the web site has now removed references to being an open source company. As always there are subtleties and nuances. In the case of Prusa, not only are Chinese companies taking Prusa designs and source to make proprietary, closed-source products, they are also actively patenting designs and algorithms they've taken from open source. The original submission ends with a question. "With Red Hat recently taking a step towards becoming a proprietary software company (which happens to use and work on open source projects) and now these reports, what are Slashdotters' thoughts on the future? "Are truly open source companies doomed to failure, especially when overseas companies do not respect or even understand the principles of open source development?"' -- source: https://news.slashdot.org/story/23/07/15/1853247 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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Speed Versus Bandwidth
by Lawrence D'Oliveiro 16 Jul '23

16 Jul '23

Love the (original) opening sentence of this article <https://arstechnica.com/gadgets/2023/07/light-based-lifi-promises-amazing-w…>: Light is almost certainly the fastest thing around. So it makes sense that "light-based wireless communications," or LiFi, could blow the theoretical doors off existing radio-wave wireless standards, to the tune of a maximum 224GB per second. A correction/clarification immediately follows, but it’s clear the writer didn’t quite grasp that both visible light and radio waves are propagated by exactly the same particles--photons--travelling at exactly the same speed. What is true is that, as the frequency of the photons increases, so does their information-carrying capacity. This is why we have digital broadcasts (TV particularly), mobile phone/data services and our own wi-fi networks all moving to higher and higher frequencies. The downside is, as the frequency of a photon increases, so does its energy. And so it tends to react more and more with (i.e. be absorbed by) various bits of matter that it might encounter--such as the walls of buildings, or even the air itself. This tends to limit the useful range of these communication bands.

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Torvalds Calls For Calm as Bcachefs Filesystem Doesn't Make Linux 6.5
by Peter Reutemann 11 Jul '23

11 Jul '23

'Linus Torvalds has delivered the first release candidate for version 6.5 of the Linux kernel, but warned this release may not go entirely smoothly. From a report: Torvalds's headline assessment of rc1 is "none of it looks hugely unusual." "The biggest single mention probably goes to what wasn't merged, with the bcachefs pull request resulting in a long thread (we didn't hit a hundred emails yet, but it's not far away)." As The Register reported in 2022, bcachefs is a filesystem that's been in development for nigh on a decade without being added to the kernel. Kernel-watching outlet Phoronix on Sunday wrote that the filesystem is in good shape but debate over "code changes needed to the kernel outside of the kernel module itself" have proved contentious. As a result, conversation on the Linux kernel mailing list is "often becoming heated" when the topic turns to bcachefs. In his announcement post for rc1, Torvalds wrote "Let's calm this party down."' -- source: https://linux.slashdot.org/story/23/07/10/2042253 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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Fairphone 3 Gets Seven Years of Updates, Besting Every Other Android OEM
by Peter Reutemann 11 Jul '23

11 Jul '23

'Ars Technica: No one in the Android ecosystem can hold a candle to Apple's software support timeline for the iPhone, but there is one company that comes the closest: Fairphone. Following in the footsteps of the Fairphone 2, the Fairphone 3 is also getting an Android-industry-best seven years of OS support. Fairphone continues to run circles around giant tech companies that have a lot more resources than it does, and it's doing this even in the face of component vendors like Qualcomm dropping support for the phone's core components. The company announced today that the Fairphone 3, which was released in 2019, has had its support extended to 2026, making for seven years of updates. The company also just released Android 13 for the Fairphone 3. Google's own 2019 phone, the Pixel 4, shut down support in October 2022. Fairphone strives to make sustainable smartphones, designing its products to be repairable and also offering replacement parts for sale online. Part of that sustainability mission is an absolutely herculean effort to keep the Android updates flowing, even when Qualcomm drops critical software support for the SoC. Fairphone says the Snapdragon 632 SoC in the Fairphone 3 was only supported up to Android 11, so continuing to support the Fairphone 3 meant doing the upgrades all by itself.' -- source: https://tech.slashdot.org/story/23/07/10/213256 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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CERT To Be Merged Into GCSB?
by Lawrence D'Oliveiro 10 Jul '23

10 Jul '23

Couple of local items here <https://www.theregister.com/2023/07/10/asia_tech_news_roundup/> that I hadn’t heard of before: Andrew Little is considering bringing CERT under the control of the Government Communications Security Bureau, and also Microsoft is raising cloud prices, though not those for on-prem products, in NZ.

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Mastodon fixes critical “TootRoot” vulnerability allowing node hijacking
by Peter Reutemann 10 Jul '23

10 Jul '23

'The maintainers of the open source software that powers the Mastodon social network published a security update on Thursday that patches a critical vulnerability making it possible for hackers to backdoor the servers that push content to individual users. Mastodon is based on a federated model. The federation comprises thousands of separate servers known as "instances." Individual users create an account with one of the instances, which in turn exchange content to and from users of other instances. To date, Mastodon has more than 12,000 instances and 14.5 million users, according to fedidb.org/, a site that tracks statistics related to Mastodon. A critical bug tracked as CVE-2023-36460 was one of two vulnerabilities rated as critical that were fixed on Thursday. In all, Mastodon on Thursday patched five vulnerabilities. So far, Mastodon gGmbH, the nonprofit that maintains the software instances uses to operate the social network, has released few details about CVE-2023-36460 other than to describe it as an “arbitrary file creation through media attachments” flaw. “Using carefully crafted media files, attackers can cause Mastodon's media processing code to create arbitrary files at any location," Mastodon said. "This allows attackers to create and overwrite any file Mastodon has access to, allowing Denial of Service and arbitrary Remote Code Execution.” In a Mastodon post, independent security researcher Kevin Beaumont went a step further, writing that exploiting the vulnerability allowed someone “to send a toot which makes a webshell on instances that process said toot.” He coined the name #TootRoot because user posts, known as toots, allowed hackers to potentially gain root access to instances.' -- source: https://arstechnica.com/security/2023/07/mastodon-fixes-critical-tootroot-v… Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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Researchers Discovered a New Linux Kernel 'StackRot' Privilege Escalation Vulnerability
by Peter Reutemann 10 Jul '23

10 Jul '23

'Wednesday Greg Kroah-Hartman announced the release of the 6.4.2 kernel. "All users of the 6.4 kernel series must upgrade." The Hacker News reports: Details have emerged about a newly identified security flaw in the Linux kernel that could allow a user to gain elevated privileges on a target host. Dubbed StackRot (CVE-2023-3269, CVSS score: 7.8), the flaw impacts Linux versions 6.1 through 6.4. There is no evidence that the shortcoming has been exploited in the wild to date. "As StackRot is a Linux kernel vulnerability found in the memory management subsystem, it affects almost all kernel configurations and requires minimal capabilities to trigger," Peking University security researcher Ruihan Li said. "However, it should be noted that maple nodes are freed using RCU callbacks, delaying the actual memory deallocation until after the RCU grace period. Consequently, exploiting this vulnerability is considered challenging." Following responsible disclosure on June 15, 2023, it has been addressed in stable versions 6.1.37, 6.3.11, and 6.4.1 as of July 1, 2023, after a two-week effort led by Linus Torvalds. A proof-of-concept (PoC) exploit and additional technical specifics about the bug are expected to be made public by the end of the month. ZDNet points out that Linux 6.4 "offers improved hardware enablement for ARM boards" and does a better job with the power demands of Steam Deck gaming devices. And "On the software side, the Linux 6.4 release includes more upstreamed Rust code. We're getting ever closer to full in-kernel Rust language support." The Register also notes that Linux 6.4 also includes "the beginnings of support for Apple's M2 processors," along with support for hibernation of RISC-V CPUs, "a likely presage to such silicon powering laptop computers."' -- source: https://linux.slashdot.org/story/23/07/09/0131210 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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Undocumented Raspberry Pi
by Lawrence D'Oliveiro 10 Jul '23

10 Jul '23

This little project <https://github.com/cariboulabs/cariboulite> for an SDR (Software-Defined Radio) addon card for a Raspberry Pi popped up on my feed. What caught my eye was that it made use of something called “SMI” (the “Secondary Memory Interface”) which exists on the GPIO connector but is not properly documented. There is a link to this blog post <https://iosoft.blog/2020/07/16/raspberry-pi-smi/> in which the writer reports some investigations into the details of this interface. Speed tests in that article give results of 25 16-bit samples per second or more, depending on the Raspberry Pi model; though note there are some odd glitches sometimes, as well as high bus contention (clearly pushing the Pi hardware to its limits). Maybe this is why the interface is not documented: because it is not considered production-ready ...

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AMD CPU Use Among Linux Gamers Approaching 70% Marketshare
by Peter Reutemann 05 Jul '23

05 Jul '23

'The June Steam Survey results show that AMD CPUs have gained significant popularity among Linux gamers, with a market share of 67% -- a remarkable 7% increase from the previous month. Phoronix reports: In part that's due to the Steam Deck being powered by an AMD SoC but it's been a trend building for some time of AMD's increasing Ryzen CPU popularity among Linux users to their open-source driver work and continuing to build more good will with the community. In comparison, last June the AMD CPU Linux gaming marketshare came in at 45% while Intel was at 54%. Or at the start of 2023, AMD CPUs were at a 55% marketshare among Linux gamers. Or if going back six years, AMD CPU use among Linux gamers was a mere 18% during the early Ryzen days. It's also the direct opposite on the Windows side. When looking at the Steam Survey results for June limited to Windows, there Intel has a 68% marketshare to AMD at 32%. Beyond the Steam Deck, it's looking like AMD's efforts around open-source drivers, AMD expanding their Linux client (Ryzen) development efforts over the past two years, promises around OpenSIL, and other efforts commonly covered on Phoronix are paying off for AMD in wooing over their Linux gaming customer base.' -- source: https://hardware.slashdot.org/story/23/07/03/2233208 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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Firefox 115 Released
by Peter Reutemann 05 Jul '23

05 Jul '23

'Today, Mozilla released Firefox 115. Changes most visible to users include: * Hardware video decoding is now enabled for Intel GPUs on Linux.. * Migrating from another browser? Now you can bring over payment methods you've saved in Chrome-based browsers to Firefox. * The Tab Manager dropdown now features close buttons, so you can close tabs more quickly. * The Firefox for Android address bar's new search button allows you to easily switch between search engines and search your bookmarks and browsing history. * We've refreshed and streamlined the user interface for importing data in from other browsers. * Users without platform support for H264 video decoding can now fallback to Cisco's OpenH264 plugin for playback. But the most important feature is that this release is the new ESR. Why this is important? y'all ask, well: * Many a "downstream" project depends on Firefox ESR, for example the famous email client Thunderbird, or KaiOS (a mobile OS very popular in India, SE Asia, Africa and LatAm), so, for better or worse, whatever made it to (or is lacking from) this version of the browser, those projects have to use for the next year. * Firefox ESR is the default browser of many distros, like Debian and Kali Linux, so, whatever made it to this version will be there for next year, ditto to whatever is lacking. * If you are on old -- unsupported OSs, like Windows 7, 8-8.1 or MacOS 10.14 (Mojave, the last MacOS with support for 32 Bit Apps), 10.13 or 10.12 you will automatically be migrated to Firefox ESR, so this will be your browser until Sept. 2024.' -- source: https://news.slashdot.org/story/23/07/04/189258 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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Linux Foundation's Yocto Project Expands LTS to 4 Years
by Peter Reutemann 03 Jul '23

03 Jul '23

'Wikipedia defines the Yocto Project as "a Linux Foundation collaborative open source project whose goal is to produce tools and processes that enable the creation of Linux distributions for embedded and IoT software that are independent of the underlying architecture of the embedded hardware." This week the Linux Foundation shared an update on the 12-year-old Yocto Project: In an effort to support the community, The Yocto Project announced the first Long Term Support (LTS) release in October 2020. Today, we are delighted to announce that we are expanding the LTS release and extending the lifecycle from 2 to 4 years as standard. The continued growth of the Yocto Project coincides with the welcomed addition of Exein as a Platinum Member, joining AMD/Xilinx, Arm, AWS, BMW Group, Cisco, Comcast, Intel, Meta and WindRiver. As a Member, Exein brings its embedded security expertise across billions of devices to the core of the Yocto Project... "The Yocto Project has been at the forefront of OS technologies for over a decade," said Andrew Wafaa, Yocto Project Chairperson. "The adaptability and variety of the tooling provided are clearly making a difference to the community. We are delighted to welcome Exein as a member as their knowledge and experience in providing secure Yocto Project based builds to customers will enable us to adapt to the modern landscape being set by the US Digital Strategy and the EU Cyber Resilience Act." "We're extremely excited to become a Platinum Partner of the Yocto Project," said Gianni Cuozzo, founder and CEO of Exein. "The Yocto Project is the most important project in the embedded Linux space, powering billions of devices every year. We take great pride in contributing our extensive knowledge and expertise in embedded security to foster a future that is both enhanced and secure for Yocto-powered devices. We are dedicated to supporting the growth of the Yocto Project as a whole, aiming to improve its support for modern languages like Rust, and assist developers and OEMs in aligning with the goals outlined in the EU Cyber Resilience Act." ' -- source: https://linux.slashdot.org/story/23/07/01/0346241 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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Brave aims to curb practice of websites that port scan visitors
by Peter Reutemann 30 Jun '23

30 Jun '23

'The Brave browser will take action against websites that snoop on visitors by scanning their open Internet ports or accessing other network resources that can expose personal information. Starting in version 1.54, Brave will automatically block website port scanning, a practice that a surprisingly large number of sites were found engaging in a few years ago. According to this list compiled in 2021 by a researcher who goes by the handle G666g1e, 744 websites scanned visitors’ ports, most or all without providing notice or seeking permission in advance. eBay, Chick-fil-A, Best Buy, Kroger, and Macy's were among the offending websites.' -- source: https://arstechnica.com/security/2023/06/brave-will-soon-control-which-site… Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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A Comprehensive Analysis of the GPL Issues With the Red Hat Enterprise Linux (RHEL) Business Mode
by Peter Reutemann 30 Jun '23

30 Jun '23

'For approximately twenty years, Red Hat (now a fully owned subsidiary of IBM) has experimented with building a business model for operating system deployment and distribution that looks, feels, and acts like a proprietary one, but nonetheless complies with the GPL and other standard copyleft terms. Software rights activists, including SFC, have spent decades talking to Red Hat and its attorneys about how the Red Hat Enterprise Linux (RHEL) business model courts disaster and is actively unfriendly to community-oriented Free and Open Source Software (FOSS). These pleadings, discussions, and encouragements have, as far as we can tell, been heard and seriously listened to by key members of Red Hat's legal and OSPO departments, and even by key C-level executives, but they have ultimately been rejected and ignored — sometimes even with a “fine, then sue us for GPL violations” attitude. Activists have found this discussion frustrating, but kept the nature and tenure of these discussions as an “open secret” until now because we all had hoped that Red Hat's behavior would improve. Recent events show that the behavior has simply gotten worse, and is likely to get even worse.' -- source: https://sfconservancy.org/blog/2023/jun/23/rhel-gpl-analysis/ Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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A Potted History Of 60 Years Of Computer Networking
by Lawrence D'Oliveiro 29 Jun '23

29 Jun '23

These guys, Larry Peterson and Bruce Davie, have done a whole series of open-source books all around the common theme of “A Systems Approach”. Here <https://www.theregister.com/2023/06/28/60_years_of_networking/> one of them offers a summary of the origins of the Internet, going back to the invention of packet switching and “best effort” delivery, and how that turned out to be such an important change from the traditional telephone network. He also takes the credit/blame for a long-standing myth about the Internet: I feel obligated to point out that there is no mention in this paper of the internet being designed to withstand nuclear attack. Unfortunately, I was responsible for perpetuating that misconception in an early edition of Computer Networks: A Systems Approach. Leiner et al debunk this myth and explain its origins in their paper, but it’s a remarkably persistent one. “[C]ontinue despite loss of networks or gateways” is as close as it gets. But now, cracks are starting to show in the trend toward centralization of popular Internet services. Not only is the “Fediverse” providing alternatives to Twitter and Facebook, but it is now also offering choices to those fed up with recent developments at Reddit, as well.

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The ReactOS Project Suddenly Shows Signs of Life
by Peter Reutemann 29 Jun '23

29 Jun '23

'ReactOS is an open-source operating system that aims to replicate Microsoft Windows, and can already run many Windows applications without modification. ReactOS published a new (infrequent) newsletter to outline recent work. It reveals that progress has slowed down recently, but the project definitely isn't dead. The newsletter also acknowledges the team hasn't put out a new version since the end of 2021, although progress continues. Due to shifting focuses to quality releases, they are no longer on a quarterly release cadence. The date of the next release is not set yet, but according to a huge list of already-implemented changes they aim for it to be a substantial update. The last update to ReactOS was version 0.4.14, released on December 2021. While developers were previously committed to releasing updates every three months, that has since changed and updates will now be focused on quality rather than quantity. For the ReactOS team to be confident enough to release something, it needs to have less than 20 known unfixed regressions while adding new features and functions. Behind the scenes, it looks like things are spinning well. The team specifically highlighted its progress on the x64 port of ReactOS, which went from being a non-booting mess to an operating system that boots up and mostly works. It doesn't run any x86 programs since it doesn't have WoW64, but it's going well.' -- source: https://tech.slashdot.org/story/23/06/28/212238 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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Microsoft's GitHub Under Fire For DDoSing Crucial Open Source Project Website
by Peter Reutemann 29 Jun '23

29 Jun '23

'The servers used by the GMP project, an open source arithmetic library at the heart of GCC and other programs, slowed to a crawl earlier this month due to a large amount of network traffic originating from Microsoft servers. The Register reports: Torbjorn Granlund, principal author of GMP, raised the alarm in a note to the project's mailing list. "The GMP servers are under attack by several hundred IP addresses owned by Microsoft Corporation," he wrote. "We do not know if this is made with malice by Microsoft, if it is some sort of mistake, or if [it is one] of their cloud customers ... running the attack. The attack targets the GMP repo, with thousands of identical requests. The requests are cleverly chosen as to cause heavy system load. "We're firewalling off all of Microsoft's IP addresses as an emergency response." The following day, Mike Blacker, director of threat hunting, operations, and response at Microsoft's GitHub, had identified the culprit: a GitHub Actions Workflow that clones a Mercurial repo and has been forked more than 700 of times. "Microsoft and GitHub have investigated the issue and determined that a GitHub user updated a script within the FFmpeg-Builds project that pulled content from https://gmplib.org," explained Blacker. "This build was configured to run parallel simultaneous tests on 100 different types of computers/architectures. This activity does not appear to be nefarious. [GMP] appears to have limited infrastructure that could not sustain the limited, yet simultaneous requests." [...] As of last week, the excessive traffic was still an issue. "Our servers are fully available again, but that's the result of us adding all participating Microsoft network ranges to our firewall," the GMP project explains on its webpage. "We understand that we are far from the first project to take such measures against Github." The Register asked Granlund whether he was satisfied with Microsoft-GitHub's response, and he told us he had only heard once from Blacker. "I blocked about 40 IP ranges from accessing our web server," he explained. "A week after this started, there was still intensive traffic from the same IP addresses, perhaps 100 different Microsoft addresses all in all, belonging to about 40 ranges. The difference was that that traffic just caused minuscule load, and a log line in the firewall." "Problem solved. I cannot care less if they no longer can access gmplib.org. I find it interesting how little responsibility Github/Microsoft assume here. They seem to think that they are entitled to bash away at smaller sites." ' -- source: https://tech.slashdot.org/story/23/06/28/2045228 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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Let’s Encrypt Outage--Did Anybody Notice?
by Lawrence D'Oliveiro 29 Jun '23

29 Jun '23

Just noticed a mention in passing in this article <https://www.theregister.com/2023/06/28/microsofts_github_gmp_project/> that Let’s Encrypt was issuing bad certificates over a period of about an hour earlier this month <https://letsencrypt.status.io/pages/incident/55957a99e800baa4470002da/648b3…>. An explanation of what went wrong (from a third party who does monitoring of CA (mis)behaviour as part of his job) is here <https://www.agwa.name/blog/post/last_weeks_lets_encrypt_downtime>. Seems like many of the people affected were still using their bad certificates a week after the incident. Did you have one of the bad certificates? That article mentions a new addition to the ACME auto-renewal protocols that would allow clients to resolve a glitch like this in future without any manual intervention.

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The Linux coders turning the ROG Ally and other handhelds into Steam Deck clones
by Peter Reutemann 28 Jun '23

28 Jun '23

'As soon as I was done with my review of the Asus ROG Ally, I grabbed my best USB stick and started looking for ISOs to download. Windows is, of course, the main highway to most PC gaming, but it's also (as detailed in the review) not yet built to work well on a 7-inch gaming handheld. The ROG Ally ships with Windows (Home) installed and a bunch of Asus software, but it is still, at heart, a PC. With effort, you can get into the BIOS, disable Secure Boot, plug in a USB stick, and boot a USB stick with a live Linux distribution on it. [...] With Ubuntu 23.04 installed, I could run the Phoronix Test Suite and run glxgears, which showed that at least some kind of 3D acceleration was happening. I installed Cyberpunk 2077 through Steam's Proton compatibility tool, benchmarked it, and got, well, very sad numbers. Cyberpunk saw that my GPU was the Ally's key feature—an AMD Ryzen Z1 Extreme. But it ran at 17 and 23 frames per second averages on "Medium" and "Steam Deck" settings, respectively (at 720p resolution and 60 Hz refresh rate). With nothing to lose, I installed the latest AMD Linux drivers, ran those benchmarks again, and lo and behold, improvement: 30.8 and 27.32 fps on "Medium" and "Steam Deck." That's notably shy of the 38 and 34 frames per second I clocked on the same benchmark in Windows. Then again, I'm guessing at drivers, and I can't do much to control thermals or power draw.' -- source: https://arstechnica.com/gadgets/2023/06/the-linux-coders-turning-the-rog-al… Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

2 1

Kart - git for geospatial data
by Peter Reutemann 27 Jun '23

27 Jun '23

Hi everyone Just came across this interesting project on my Mastodon feed (https://cloudisland.nz/@dznz/110613146633504731) Kart - Distributed version-control for geospatial and tabular data "stores geospatial and tabular data in Git, providing version control at the row and cell level." https://kartproject.org/ Is being developed by local company Koordinates and released under GPLv2 with linking exception. Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

2 1

Linux Foundation Celebrates Zephyr Project's Small Real-Time Operating System
by Peter Reutemann 27 Jun '23

27 Jun '23

'This week the Linux Foundation shared an update on the Zephyr Project, a small real-time operating system for connected, resource-constrained and embedded devices: The project recently achieved several milestones including surpassing 80,000 commits since it was released in open source in 2015. This is an average of almost 2 commits per hour, which was made recently by 490 individuals, including 166 first-timers, who contributed to the 3.4 release. Zephyr RTOS supports over 450 boards running embedded microcontrollers from Arm and RISC-V to Tensilica, NIOS, ARC and x86 as single and multicore systems... Zephyr RTOS has a growing set of software libraries that can be used across various applications and industry sectors such as Industrial IoT, wearables, machine learning and more. It is built with an emphasis on broad chipset support, security, dependability, long-term support releases and a growing open source ecosystem... The Zephyr community will be at the Zephyr Developer Summit, which takes place on June 27-30 in Prague, Czech Republic, and virtually as part of the first-ever Embedded Open Source Summit. [Register here for virtual attendance.] Arduino will be joining Zephyr's Technical Steering Committee, along with Technology Innovation Institute and the American multinational semiconductor company Analog Devices (or ADI, who will also be joining its governing board). Arduino's CEO said "We believe that Zephyr OS is a truly special project that will play a significant role in the Arduino ecosystem and will be a big priority for us." As a "Platinum"-level sponsor, ADI joins Antmicro, Baumer, Google, Intel, Meta, Nordic Semiconductor, NXP, Oticon, Qualcomm Innovation Center and T-Mobile.' -- source: https://news.slashdot.org/story/23/06/26/0234245 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

1 0

GCC Steering Committee Announces a Code of Conduct
by Peter Reutemann 26 Jun '23

26 Jun '23

'GCC is the GNU project's free and open-source cross-platform compiler collection. Now an anonymous reader shared this announcement from the mailing list for GCC: The GCC Steering Committee has decided to adopt a Code of Conduct for interactions in GCC project spaces, including mailing lists, bugzilla, and IRC. The vast majority of the time, the GCC community is a very civil, cooperative space. On the rare occasions that it isn't, it's helpful to have something to point to to remind people of our expectations. It's also good for newcomers to have something to refer to, for both how they are expected to conduct themselves and how they can expect to be treated... At this time the CoC is preliminary: the code itself should be considered active, but the CoC committee (and so the reporting and response procedures) are not yet in place. There's also an official FAQ, and GCC's Code of Conduct begins with this introduction. "Like the free software community as a whole, the GCC community is made up of a mixture of professionals and volunteers from all over the world, working on every aspect of the project — including mentorship, teaching, and connecting people." Where this leads to issues and unhappiness, "we have a few ground rules that we ask people to adhere to... [T]ake it in the spirit in which it's intended — a guide to make it easier to enrich all of us, the project, and the broader communities in which we participate."' -- source: https://news.slashdot.org/story/23/06/25/2255253 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

1 0

PipeWire Versus PulseAudio+JACK
by Lawrence D'Oliveiro 25 Jun '23

25 Jun '23

Came across this PipeWire FAQ <https://gitlab.freedesktop.org/pipewire/pipewire/-/wikis/FAQ>, which among other things explains why there is a need to replace both PulseAudio and JACK. Briefly, it started from a wish to manage video inputs and outputs in a similar way to audio inputs and outputs, and also fix some performance/configuration limitations in the older specs. And if you are wondering why all your sound devices have suddenly acquired a “Pro Audio” option in their settings, this explains that as well. Also, for those complaining that Wayland’s stricter security model breaks basic functionality like screen recording and sharing, it appears PipeWire is the basis for the solution to that problem.

1 0

DuckDuckGo browser beta for Windows bakes in a lot of privacy tools
by Peter Reutemann 23 Jun '23

23 Jun '23

'Privacy-focused firm DuckDuckGo has released a public beta of its browser for Windows, offering more default privacy protections and an assortment of Duck-made browsing tools. More than a year after debuting its browser for Mac in private beta, the search engine and tracking antagonist offers many of those same features to a much wider audience. Like its Mac browser, DuckDuckGo (DDG) uses "the underlying operating system rendering API" rather than its own forked browser code. That's "a Windows WebView2 call that utilizes the Blink rendering engine underneath," according to DuckDuckGo's blog post. Fittingly, the browser reports itself as Microsoft Edge at most header-scanning sites.' -- source: https://arstechnica.com/gadgets/2023/06/duckduckgo-offers-its-privacy-cente… Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

1 0

The Art Of Refurbishing Old Computers
by Lawrence D'Oliveiro 22 Jun '23

22 Jun '23

Interesting report <https://www.theregister.com/2023/06/21/pc_officina_positive_trashware/> on an Italian organization, which mentions some points which could be useful to those doing the same thing here: how to salvage and refurbish old PCs for donation to those who can’t afford something new. Note that they won’t take any old rubbish: they will no longer accept 32-bit machines or those needing DDR2 RAM, for example. Their current recommended OS is Linux Mint 21 with XFCE, but they will source Microsoft Windows for those who really want it (at what cost?).

1 0

Latest SUSE Linux Enterprise Goes All in With Confidential Computing
by Peter Reutemann 21 Jun '23

21 Jun '23

'SUSE's latest release of SUSE Linux Enterprise 15 Service Pack 5 (SLE 15 SP5) has a focus on security, claiming it as the first distro to offer full support for confidential computing to protect data. From a report: According to SUSE, the latest version of its enterprise platform is designed to deliver high-performance computing capabilities, with an inevitable mention of AI/ML workloads, plus it claims to have extended its live-patching capabilities. The release also comes just weeks after the community release openSUSE Leap 15.5 was made available, with the two sharing a common core. The Reg's resident open source guru noted that Leap 15.6 has now been confirmed as under development, which implies that a future SLE 15 SP6 should also be in the pipeline. SUSE announced the latest version at its SUSECON event in Munich, along with a new report on cloud security issues claiming that more than 88 percent of IT teams have reported at least one cloud security incident over the the past year. This appears to be the justification for the claim that SLE 15 SP5 is the first Linux distro to support "the entire spectrum" of confidential computing, allowing customers to run fully encrypted virtual machines on their infrastructure to protect applications and their associated data. Confidential computing relies on hardware-based security mechanisms in the processor to provide this protection, so enterprises hoping to take advantage of this will need to ensure their servers have the necessary support, such as AMD's Secure Encrypted Virtualization-Secure Nested Paging (SEV-SNP) and Intel's Trust Domain Extensions (TDX).' -- source: https://linux.slashdot.org/story/23/06/20/1846203 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

1 0

PostgreSQL Reconsiders Its Process-Based Model
by Peter Reutemann 20 Jun '23

20 Jun '23

'Jonathan Corbet, writing at LWN: In the fast-moving open-source world, programs can come and go quickly; a tool that has many users today can easily be eclipsed by something better next week. Even in this environment, though, some programs endure for a long time. As an example, consider the PostgreSQL database system, which traces its history back to 1986. Making fundamental changes to a large code base with that much history is never an easy task. As fundamental changes go, moving PostgreSQL away from its process-oriented model is not a small one, but it is one that the project is considering seriously. A PostgreSQL instance runs as a large set of cooperating processes, including one for each connected client. These processes communicate through a number of shared-memory regions using an elaborate library that enables the creation of complex data structures in a setting where not all processes have the same memory mapped at the same address. This model has served the project well for many years, but the world has changed a lot over the history of this project. As a result, PostgreSQL developers are increasingly thinking that it may be time to make a change.' -- source: https://tech.slashdot.org/story/23/06/19/1723259 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

2 1

KDE Plasma 6 Is Now 'Fairly Livable'
by Peter Reutemann 20 Jun '23

20 Jun '23

'Prominent KDE developer Nate Graham believes that Plasma 6 is now "fairly livable" and recommends KDE developers and power users / enthusiasts start giving it a try. Phoronix reports: He characterized Plasma 6 as: "Basically everything in Plasma compiles with Qt 6, and at this point Plasma 6 is fairly livable. To give you a sense of how livable, it's good enough that over the past 2 months, I've gone on three KDE-related trips from the USA to Europe, with my only computer running Plasma 6 in "current git master" state, with work-in-progress merge requests applied! Its stability has been good enough that this has caused me no apprehension, and indeed, it's been totally fine on each trip. So seriously, if you're a KDE developer or an adventurous user, start living on Plasma 6! Jump right in, the water's fine. :)" He went on to write more about the current development activities around Plasma 6. He also shared his personal beliefs around Plasma 6.0 release timing although no official release schedule is yet to be determined. Nate's belief is that Plasma 6.0 will likely be ready for release sometime between December and March.' -- source: https://developers.slashdot.org/story/23/06/19/212256 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

1 0

The State Of Linux Music Production
by Lawrence D'Oliveiro 17 Jun '23

17 Jun '23

Been messing about with my old MIDI keyboard again, after a long while putting it aside. It now complains about a “low battery” warning, but I think that only affects the onboard sound settings, which I’m not particularly fussed about. I got a USB-MIDI interface a few years back, and I can use that with the keyboard to drive sound sources on my main machine. But things have changed in the Linux music world since the last time I tried this (at least on Debian). JACK and PulseAudio have both been replaced by this new thing, PipeWire, which is supposed to handle video, audio and MIDI routing through a common architecture. So I no longer have to start up jackd when I want to switch to music-production mode (in fact, trying to run jackd under PipeWire will screw up your audio something awful). Instead, patching between sources and sinks is done via WirePlumber, for which a convenient GUI frontend is available in the form of qpwgraph. All the main PipeWire-related processes are managed as user-level services via systemd. One thing hasn’t changed, and that is the incompatibility between ALSA MIDI ports and JACK MIDI ports: that USB-MIDI interface only appears to the system as ports of the ALSA kind, whereas JACK-aware apps want to accept MIDI data via ports of the JACK kind. So I still have to start up the old “a2jmidid” program to provide a bridge between these two. qpwgraph shows all these different kinds of entities, each labelled with its type: “ALSA”, “PW” (PipeWire) or “JACK”. The latter two can be connected directly to one another, while ALSA ports can only be connected to ALSA ports. The colour-coding--purple for ALSA MIDI ports, red for JACK/PipeWire MIDI, green for JACK/PipeWire audio--is a hint that you can only connect matching colours. Some JACK-aware apps still have trouble running under PipeWire; for these, there is the “pw-jack” tool, which substitutes the JACK dynamic libraries with ones that hook directly into PipeWire before launching the specified app. E.g. I had to run a2jmidid with pw-jack a2jmidid Also, the command pw-jack zynaddsubfx -O jack tells ZynAddSubFX to run with its JACK interface active, and I can route events from my keyboard to it via the intermediary nodes automatically created by a2jmidid. Don’t forget to hook up its audio output terminals to the box representing my speakers, and voilà, I can make sound.

1 0

Analysis Of The GMail Fake Email Exploit
by Lawrence D'Oliveiro 15 Jun '23

15 Jun '23

You may have heard about an interesting hack a few days ago <https://www.theregister.com/2023/06/09/google_bimi_email_authentication/>, where some low-lifes figured out how to send fraudulent emails to GMail users that showed a “verified” blue BIMI checkmark, indicating that the recipient could trust the from-address as authentic. But of course it was not. The details of how the hack was perpetrated are quite intricate, and involve some subtle interplay between the mail-processing policies of GMail (where the recipients had their accounts, and which implements the BIMI check), Microsoft (which ran the Exchange servers where the fraudsters got accounts, and from which the fraudulent messages were sent) and UPS (the purported sender of the fake emails). Of course, all three parties have since taken action to ensure this particular scenario will not happen again. ThioJoe offers up a good explanation of how it all worked here <https://www.youtube.com/watch?v=Czc0F_A82rE>. If your eyes glaze over at the mention of SPF versus DKIM versus DMARC--well, you’re not alone. When I looked at whether I should implement something like this on my own mail server to try to ensure that spammers could not send out fake emails under my name, I felt the same way. So I just decided not to bother. For now ...

1 0

Question re: Desktop computer running Ubuntu is slow, mouse and keyboard missing commands
by Michael James 14 Jun '23

14 Jun '23

Can anyone please assist with this Ubuntu desktop severely slowed down, mouse and keyboard severely delayed, skipping and or typing multiple letters/numbers with the problem progressively getting worse. Internet speed is at standard mark. Thanks, Noho ora mai, All the best, Michael James __________________________________________________________________________________________ MICHAEL JAMES PASTROFF phone: inside New Zealand 021 115 3713 outside New Zealand 64 21 115 3713

2 2

Edge Sends Images You View Online To Microsoft
by Peter Reutemann 13 Jun '23

13 Jun '23

'Not so long ago, Microsoft Edge ended up in hot waters after users discovered a bug leaking your browser history to Bing. Now you may want to toggle off another feature to ensure Edge is not sending every picture you view online to Microsoft. Edge has a built-in image enhancement tool that, according to Microsoft, can use "super-resolution to improve clarity, sharpness, lighting, and contrast in images on the web." Although the feature sounds exciting, recent Microsoft Edge Canary updates have provided more information on how image enhancement works. The browser now warns that it sends image links to Microsoft instead of performing on-device enhancements.' -- source: https://yro.slashdot.org/story/23/06/12/182216 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

1 0

Debian 12 'Bookworm' Released
by Peter Reutemann 12 Jun '23

12 Jun '23

'Slashdot reader e065c8515d206cb0e190 shared the big announcement from Debian.org: After 1 year, 9 months, and 28 days of development, the Debian project is proud to present its new stable version 12 (code name bookworm). bookworm will be supported for the next 5 years thanks to the combined work of the Debian Security team and the Debian Long Term Support team... This release contains over 11,089 new packages for a total count of 64,419 packages, while over 6,296 packages have been removed as obsolete. 43,254 packages were updated in this release. The overall disk usage for bookworm is 365,016,420 kB (365 GB), and is made up of 1,341,564,204 lines of code. bookworm has more translated man pages than ever thanks to our translators who have made man-pages available in multiple languages such as: Czech, Danish, Greek, Finnish, Indonesian, Macedonian, Norwegian (Bokmål), Russian, Serbian, Swedish, Ukrainian, and Vietnamese. All of the systemd man pages are now completely available in German. The Debian Med Blend introduces a new package: shiny-server which simplifies scientific web applications using R. We have kept to our efforts of providing Continuous Integration support for Debian Med team packages. Install the metapackages at version 3.8.x for Debian bookworm. The Debian Astro Blend continues to provide a one-stop solution for professional astronomers, enthusiasts, and hobbyists with updates to almost all versions of the software packages in the blend. astap and planetary-system-stacker help with image stacking and astrometry resolution. openvlbi, the open source correlator, is now included. Support for Secure Boot on ARM64 has been reintroduced: users of UEFI-capable ARM64 hardware can boot with Secure Boot mode enabled to take full advantage of the security feature. 9to5Linux has screenshots, and highlights some new features: Debian 12 also brings read/write support for APFS (Apple File System) with the apfsprogs and apfs-dkms utilities, a new tool called ntfs2btrfs that lets you convert NTFS drives to Btrfs, a new malloc implementation called mimalloc, a new kernel SMB server called ksmbd-tools, and support for the merged-usr root file system layout... This release also includes completely new artwork called Emerald, designed (once again) by Juliette Taka. New fonts are also present in this major Debian release, along with a new fnt command-line tool for accessing 1,500 DFSG-compliant fonts. Debian 12 "bookworm" ships with several desktop environments, including: - Gnome 43, - KDE Plasma 5.27, - LXDE 11, - LXQt 1.2.0, - MATE 1.26, - Xfce 4.18' -- source: https://linux.slashdot.org/story/23/06/11/0333242 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

1 0

Microsoft Excel Has Become A Threat To Democracy
by Lawrence D'Oliveiro 07 Jun '23

07 Jun '23

Austria’s Social Democratic Party recently held an election for a new leader, according to <https://www.theregister.com/2023/06/06/austria_election_excel_blunder/>. Trouble was, two days after announcing the result had gone one way, they then had to report that in fact it was the other way round, owing to a stuffup involving an Excel spreadsheet. I suppose the only good news is that this was strictly an in-party election, not something involving any level of Government.

1 0

The State Of Fibre Broadband In The USA
by Lawrence D'Oliveiro 07 Jun '23

07 Jun '23

Came across this report <https://arstechnica.com/tech-policy/2023/06/internet-users-love-fiber-servi…>, which is interesting to compare with conditions in NZ: In terms of availability, the Federal Communications Commission broadband map indicates that about 38 percent of US residents can get fiber. The percentage drops to 29 percent when including only fiber services that offer gigabit download speeds and at least 100Mbps upload speeds. Basically, US broadband is dominated by companies with heavy investments in cable (and some ADSL), who have no interest in obsoleting that investment any sooner than they have to. Moral: there are places where a free market works, but strategic infrastructure buildouts is not one of them.

1 0

Trouble Accessing .nz Sites, Anybody?
by Lawrence D'Oliveiro 30 May '23

30 May '23

Seems some people have had trouble accessing various .nz sites since last night, and into this morning <https://www.nzherald.co.nz/business/banking-apps-some-websites-down-as-inte…>. The explanation at the end seems to indicate that InternetNZ is rolling out DNS security, and caching inconsistencies on ISPs’ servers are leading to hiccups for users. Hopefully this will be resolved soon as the outdated DNS entries get flushed.

2 1

Microsoft Releases Azure Linux
by Lawrence D'Oliveiro 26 May '23

26 May '23

Microsoft has announced a commercially-supported product it calls “Azure Linux” <https://devclass.com/2023/05/25/azure-linux-released-at-build-where-microso…>. This is essentially the same code as its custom “CBL-Mariner” distro that it runs internally on its Azure servers. While this is RPM-based (the same package manager used in Red Hat), it is not a fork of Red Hat, but is built specially from the ground up. Project lead Jim Perrin explains why: “The reason we chose not to fork a different distro … Microsoft has kind of a history with Linux. … I think the Balmer quote is from 2001, but a lot of the sentiment still lingers even today. Part of the reason we did not choose to start with a distribution and then fork it for our needs is we didn’t want to be seen as doing the embrace and extend thing again, we didn’t want to wake any of that up, we figured, build it from scratch, we can tailor it to our needs … we’re scratching an itch we had and offering the solution back to the community.” The “Ballmer quote” being the infamous phrase “Linux is a cancer” that then-CEO Steve Ballmer uttered back in 2001. Yes, nice to see some past sins are still kept in mind, at least in some corners of Microsoft ...

1 0

Fast Restart For Java Apps
by Lawrence D'Oliveiro 23 May '23

23 May '23

Java continues to be popular for server-side apps. But one problem is that starting a Java app can be slow. So if you have some Java code that performs a service on demand, runs for a short while and then shuts down again, that hurts performance. Enter “CRaC”, or “Coordinated Restore at Checkpoint” <https://devclass.com/2023/05/22/azul-makes-openjdk-with-fast-start-crac-gen…>, from a company called Azul, which seems to centre its entire business around OpenJDK <https://www.azul.com/about/>. This system lets the app dump its state to disk in a form that allows for quick resumption. This state cannot include things like open files/network connections, so the app itself needs to implement handlers to close these before the dump and reopen them after the restore, saving enough state as part of the dump to allow this to happen with minimal impact on the rest of the application. Interestingly, this system is built on another piece of software called “CRIU” or “Checkpoint/Restore In Userspace” <https://criu.org/Main_Page>, which is Linux-only. As Azul’s CTO says: “We submitted CRaC to OpenJDK as an idea for a project … and they’ve included it as one of the many project they have. The reason it isn’t in the mainstream yet, and I’m not even sure it will make it into the mainstream, is that we rely on the CRIU technology underneath on Linux, and there isn’t an equivalent that we’re aware of on Windows or on Mac. So you lose that cross-platform functionality … ” But as the article says, that may not such a big showstopper any more: Java applications are often developed on Windows or Mac, but most often deployed to Linux, suggesting that the lack of cross-platform support is not a deal-breaker for everyone.

1 0

Fibre Connection -- Separating Modem & Router Functions
by Lawrence D'Oliveiro 16 May '23

16 May '23

Most people probably have their internet connection provided through a single box. There are two separate functions going on: * “Modem” (layer 2) -- handling the low-level signalling with whatever is at the other end of the wire (whether copper or glass); * “Router” (layer 3) -- routing TCP/IP packets between your house LAN and your ISP, which provides the connection between there and the rest of the Internet. At one point I was running a cheap little Conexant AccessRunner USB box (bought from Dick Smith) on my ADSL connection; while this could also perform both functions in one, I found a version of the firmware that implemented only the modem function. Plugging this into a Linux box caused it to appear like an additional network interface (the drivers are already in the standard kernel). I could then control this via the “ppp” package <https://ppp.samba.org/>, using its PPP-over-ATM plugin to implement the correct low-level signalling (just VPI/VCI selection, really). I could then exploit the full power of the Linux network stack on that box to manage the connection to the rest of my house LAN. Anyway, as my own house gets wired up for fibre (soon...), I was curious as to whether something equivalent could be done for a fibre connection. And the information I’ve found so far (e.g. <https://www.geekzone.co.nz/forums.asp?forumid=81&topicid=274586>) indicates it might actually be simpler than this. The “ONT” (“Optical Network Terminator”) box that gets installed in your house has phone ports and Ethernet ports on it, and it appears that (once you have your ISP connection up and running) the Ethernet connection behaves just like a regular LAN connection, with a DHCP server (and ISP’s router) listening on the other end. So instead of an Internet router at your end, you can plug a regular PC directly into that port, pick up an allocated address, and have it immediately connected to the Internet. In short, there is nothing fibre-specific about the Internet router that the ISP provides to you at all. However, there might be issues with VLAN-tagging of the Ethernet frames, and this is not standardized between ISPs. (By the way, I see several folks claiming there is no “modem” in a fibre connection. Of course there is.) Not sure whether I’ll try this right away. Might be safest to do things the ISP-provided way, at least to begin with.

4 8

Unkillable UEFI Malware Bypassing Secure Boot Enabled By Unpatchable Windows Flaw
by Peter Reutemann 12 May '23

12 May '23

'Researchers have announced a major cybersecurity find -- the world's first-known instance of real-world malware that can hijack a computer's boot process even when Secure Boot and other advanced protections are enabled and running on fully updated versions of Windows. From a report: Dubbed BlackLotus, the malware is what's known as a UEFI bootkit. These sophisticated pieces of malware hijack the UEFI -- short for Unified Extensible Firmware Interface -- the low-level and complex chain of firmware responsible for booting up virtually every modern computer. As the mechanism that bridges a PC's device firmware with its operating system, the UEFI is an OS in its own right. It's located in an SPI-connected flash storage chip soldered onto the computer motherboard, making it difficult to inspect or patch. Because the UEFI is the first thing to run when a computer is turned on, it influences the OS, security apps, and all other software that follows. These traits make the UEFI the perfect place to run malware. When successful, UEFI bootkits disable OS security mechanisms and ensure that a computer remains infected with stealthy malware that runs at the kernel mode or user mode, even after the operating system is reinstalled or a hard drive is replaced. As appealing as it is to threat actors to install nearly invisible and unremovable malware that has kernel-level access, there are a few formidable hurdles standing in their way. One is the requirement that they first hack the device and gain administrator system rights, either by exploiting one or more vulnerabilities in the OS or apps or by tricking a user into installing trojanized software. Only after this high bar is cleared can the threat actor attempt an installation of the bootkit. The second thing standing in the way of UEFI attacks is UEFI Secure Boot, an industry-wide standard that uses cryptographic signatures to ensure that each piece of software used during startup is trusted by a computer's manufacturer. Secure Boot is designed to create a chain of trust that will prevent attackers from replacing the intended bootup firmware with malicious firmware. If a single firmware link in that chain isn't recognized, Secure Boot will prevent the device from starting.' -- source: https://it.slashdot.org/story/23/03/06/1854200 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

2 2

OpenOffice: The One FOSS Project That Deserves To Die, But Won’t
by Lawrence D'Oliveiro 06 May '23

06 May '23

The ever-dependable Brodie Robertson has a look at the ongoing (!) development history of OpenOffice here <https://www.youtube.com/watch?v=xdpMxmFvGBA>. Those of us on FOSS platforms moved to LibreOffice years ago. But among some sectors (my guess is, predominantly Microsoft Windows users?), OpenOffice still has the dominant name recognition. And just to add to the fun, the project actually continues putting out updates! Though these are just minor ones -- I don’t think there have been any major functional changes in the better part of a decade. The source code commit history also continues to bubble over, though a lot of the patches are tiny, almost trivial things, like fixing typos and making random-looking changes to whitespace.

1 0

I used System76’s Pangolin for weeks, and Linux was not the biggest problem
by Peter Reutemann 05 May '23

05 May '23

'After using System76’s Pangolin as my primary work laptop for nearly six weeks, I can tell you this: If you need a 15-inch Linux-focused laptop, this is the one to get. The Pangolin is a solid device, designed more for dependability and convenience than ultrabook portability or cutting-edge parts, but it still has reasonably modern hardware (especially its 144 Hz screen). The Pangolin and its native Pop!_OS are a showcase for how remarkably normal Linux can feel as a daily driver in 2023. Normal, and with lots of ports. It’s hard to do a nuts-and-bolts comparison of the Pangolin to most other laptops, due largely to benchmark comparability between Linux and most laptops running Windows or macOS. But it’s also not entirely necessary. There’s only one real version of the Pangolin available—one processor, one amount of RAM, then variable, user-expandable storage. We’ll show you how the Pangolin did on a couple tests. But how this laptop works for you is much more about what you’re bringing to it and what you're willing to put into customizing it to your liking. I came to the Pangolin as someone who has made a few attempts at using Linux as a daily driver. I know enough command line, vim, and Unix-based architecture to be conversant, and I have two Raspberry Pis that are constantly being improved. Still, I'm more hobbyist than practitioner. And yet the Pangolin presented no real problems as I used it for almost any task I needed to get done. Its combination of solid software and practical hardware choices make it an easy system to recommend, so long as you know you need Linux. Its maker-made operating system, Pop!_OS, almost never gave me problems, except when I was trying to make it run benchmarks. Starting with a rock-solid Linux install, where every bit of hardware is supported and functional, made me more eager to poke at the edges and see what I could customize.' -- source: https://arstechnica.com/gadgets/2023/05/review-system76-pangolin-is-a-solid… Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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'sudo' and 'su' Are Being Rewritten In Rust For Memory Safety
by Peter Reutemann 02 May '23

02 May '23

'Phoronix reports: With the financial backing of Amazon Web Services, sudo and su are being rewritten in the Rust programming language in order to increase the memory safety for the widely relied upon software... to further enhance Linux/open-source security. "[B]ecause it's written in C, sudo has experienced many vulnerabilities related to memory safety issues," according to a blog post announcing the project: It's important that we secure our most critical software, particularly from memory safety vulnerabilities. It's hard to imagine software that's much more critical than sudo and su. This work is being done by a joint team from Ferrous Systems and Tweede Golf with generous support from Amazon Web Services. The work plan is viewable here. The GitHub repository is here. ' -- source: https://linux.slashdot.org/story/23/05/01/0020239 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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Linux Foundation Announces DentOS 3.0, an Open Source Network OS for Disaggregated Networks
by Peter Reutemann 01 May '23

01 May '23

'This month the Linux Foundation announced version 3.0 of DentOS, an open source network operating system using the Linux kernel, Switchdev, and other Linux-based projects for a standardized network operating system "without abstractions or overhead," according to the project's web page. "All underlying infrastructure — including ASIC and Silicon for networking and datapath — is treated equally; while existing abstractions, APIs, drivers, low-level overhead, and other open software are simplified. DENT unites silicon vendors, ODMs, SIs, OEMs, and end users across all verticals to enable the transition to disaggregated networks." Or, as the Linux Foundation, the operating system provides "a flexible and customizable platform for network administrators to manage their networks." DENT provides access to open source-based switches at a lower cost and with more flexibility compared to proprietary switches with locked ecosystems. Network wiring closets in many facilities--including retail stores, warehousing, remote locations, enterprises, and small and mid-sized businesses--are often small, requiring a compact solution for network management. Additionally, staff expertise may be limited, and branch-office switches from leading suppliers can require costly contracts. DENT can be easily deployed on white-box hardware in small spaces, providing an efficient and cost-effective solution for network management. As a result, DENT deployment can significantly enhance network management in a wide range of environments, providing greater efficiency, reliability, and scalability... DentOS enables Amazon's Just Walk Out Technology to connect and manage thousands of devices like cameras, sensors, entry and exit gates, and access points on the network edge. ' -- source: https://tech.slashdot.org/story/23/04/30/010222 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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Not-So-Stupid(?) Linux Trick
by Lawrence D'Oliveiro 28 Apr '23

28 Apr '23

Here’s a command that can sometimes look a bit unnerving in operation, but is actually quite safe: rmdir -p «dir» where «dir» is some directory. Or to watch the whole process in action, add the option to give progress messages: rmdir -pv «dir» Background: the basic command rmdir «dir» deletes the named directory, but only if it is empty. The “-p” option takes this further, by then trying to delete the parent of «dir», and if that succeeds, the parent of that, and so on. It stops only when it gets to a nonempty directory, or when it has done all components of «dir». So if, for example, you try this on an absolute path, this will mean the command always stops on an error. And the error could quite likely be on a directory which contains important stuff that you care about. But, as I said, it’s quite safe, since it won’t delete that stuff. But I told you it could be unnerving, didn’t I?

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New Intel Linux Graphics Driver Patches Released, Up To 10-15% Better Performance
by Peter Reutemann 28 Apr '23

28 Apr '23

'A new set of patches have been released for the Intel Linux graphics driver that "can provide 10-15% better performance when operating in the tuned mode," reports Phoronix. From the report: The set of Intel i915 Linux kernel graphics driver patches are about exposing the Intel RPS (Requested Power State) up/down thresholds. Right now the Intel Linux kernel driver has static values set for the up/down thresholds between power states while these patches would make them dynamically configurable by user-space. Google engineer Syed Faaiz Hussain raised the issue that they experimented with the Intel RPS tuning and were able to manage up to 15% better performance. With Counter-Strike: Global Offensive with OpenGL was a 14.5% boost, CS:GO with Vulkan was 12.9% faster, and Civilization VI with OpenGL was 11% faster while Strange Brigade was unchanged. No other game numbers were provided. But as this is about changing the threshold for how aggressively the Intel graphics hardware switches power states, the proposed patches leave it up to user-space to adjust the thresholds as they wish. Google engineers are interested in hooking this into Feral's GameMode so that the values could be automatically tuned when launching games and then returning to their former state when done gaming, in order to maximize battery life / power efficiency. The only downside with these current patches are that they work only for non-GuC based platforms... So the latest Alder/Raptor Lake notebooks as well as Intel DG2/Alchemist discrete graphics currently aren't able to make use of this tuning option. ' -- source: https://tech.slashdot.org/story/23/04/27/1927209 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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Linux Kernel 6.3 Released
by Peter Reutemann 27 Apr '23

27 Apr '23

'A report from ZDNet, written by Steven Vaughan-Nichols: The latest Linux kernel is out with a slew of new features -- and, for once, this release has been nice and easy. [...] Speaking of Rust, everyone's favorite memory-safe language, the new kernel comes with user-mode Linux support for Rust code. Miguel Ojeda, the Linux kernel developer, who's led the efforts to bring Rust to Linux, said the additions mean we're, "getting closer to a point where the first Rust modules can be upstreamed." Other features in the Linux 6.3 kernel include support and enablement for upcoming and yet-to-be-released Intel and AMD CPUs and graphics hardware. While these updates will primarily benefit future hardware, several changes in this release directly impact today's users' day-to-day experience. The kernel now supports AMD's automatic Indirect Branch Restricted Speculation (IBRS) feature for Spectre mitigation, providing a less performance-intensive alternative to the retpoline speculative execution. Linux 6.3 also includes new power management drivers for ARM and RISC-V architectures. RISC-V has gained support for accelerated string functions via the Zbb bit manipulation extension, while ARM received support for scalable matrix extension 2 instructions. For filesystems, Linux 6.3 brings AES-SHA2-based encryption support for NFS, optimizations for EXT4 direct I/O performance, low-latency decompression for EROFS, and a faster Brtfs file-system driver. Bottom line: many file operations will be a bit more secure and faster. For gamers, the new kernel provides a native Steam Deck controller interface in HID. It also includes compatibility for the Logitech G923 Xbox edition racing wheel and improvements to the 8BitDo Pro 2 wired game controllers. Who says you can't game on Linux? Single-board computers, such as BannaPi R3, BPI-M2 Pro, and Orange Pi R1 Plus, also benefit from updated drivers in this release. There's also support for more Wi-Fi adapters and chipsets. These include: Realtek RTL8188EU Wi-Fi adapter support; Qualcomm Wi-Fi 7 wireless chipset support; and Ethernet support for NVIDIA BlueField 3 DPU. For users dealing with complex networks that have both old-school and modern networks, the new kernel can also handle multi-path TCP handling mixed flows with IPv4 and IPv6.' -- source: https://linux.slashdot.org/story/23/04/26/0023238 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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