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Reçu aujourd’hui — 15 janvier 2026LWN

Running Debian on the OpenWrt One (Collabora Blog)

Par :jzb
15 janvier 2026 à 18:57

Sjoerd Simons has published a blog post about running Debian on the OpenWrt One router hardware:

With openwrt-one-debian, you can now install and run a full Debian system leveraging the OpenWrt One's NVMe storage, enabling everything from custom services and containers to development tools and lightweight server workloads, all on open hardware.

This project provides a rust-based flasher to install Debian on the OpenWrt One, opening the door to standard Debian tooling, packages, and workflows. For developers and power users, it transforms the OpenWrt One from a network appliance into a compact, general-purpose Linux system.

See the GitHub repository for the code and latest build. LWN reviewed the device in November 2024, and covered Denver Gingerich's talk at SCALE 22x about the making of the router in March 2025.

[$] Removing a pointer dereference from slab allocations

Par :corbet
15 janvier 2026 à 14:49
Al Viro does not often stray outside of the core virtual filesystem area; when he does, it is usually worthy of note. Recently, he wandered into memory management with this patch series to the slab allocator and some of its users. Kernel developers will often put considerable effort into small optimizations, but it is still interesting to look at just how much effort has gone toward the purpose of avoiding a single pointer dereference in some memory-allocation hot paths.

A note for MXroute users

Par :jzb
15 janvier 2026 à 14:29

We have recently noticed that email from LWN.net seems to be blocked by MXroute. Unfortunately, the company also does not seem to have a way for non-customers to report problems in mail delivery, so we have no good way to get ourselves unblocked.

As a result, readers who have subscribed to an LWN mailing list from a domain hosted with MXroute will probably not receive our mailings. We have not yet unsubscribed addresses that are being blocked by MXroute, but will soon if the problem persists. Please accept our apologies for the inconvenience; it is unfortunate that it is becoming so difficult to send legitimate email as a small business.

Security updates for Thursday

Par :jzb
15 janvier 2026 à 14:04
Security updates have been issued by Debian (chromium, gnupg2, and mongo-c-driver), Fedora (firefox, gpsd, linux-firmware, and seamonkey), Mageia (net-snmp), Oracle (kernel, podman, postgresql16, postgresql:13, postgresql:15, postgresql:16, and uek-kernel), Red Hat (libpq, net-snmp, and transfig), Slackware (libpng and mozilla), SUSE (avahi, bluez, capstone, curl, dpdk, firefox, firefox-esr, fluidsynth, glib2, kernel, kernel-devel, libmicrohttpd, libpcap, libpng16, libsoup, libsoup-3_0-0, libtasn1, libvirt, mcphost, openvswitch, ovmf, podman, poppler, python-tornado6, python311, qemu, rsync, and valkey), and Ubuntu (erlang, klibc, libpng1.6, and ruby-rack).

[$] LWN.net Weekly Edition for January 15, 2026

Par :jzb
15 janvier 2026 à 00:03
Inside this week's LWN.net Weekly Edition:

  • Front: SFC v. VIZIO; GPLv2 requirements; Debian and GTK 2; OpenZL; kernel scheduler QoS; Rust concurrent data access; Asciinema.
  • Briefs: OpenSSL and Python; LSFMM+BPF 2026; Fedora elections; Gentoo retrospective; EU lawmaking; Git data model; Firefox 147; Radicle 1.6.0; Quotes; ...
  • Announcements: Newsletters, conferences, security updates, patches, and more.

The State of OpenSSL for pyca/cryptography

Par :jake
14 janvier 2026 à 23:16
Paul Kehrer and Alex Gaynor, maintainers of the Python cryptography module, have put out some strongly worded criticism of OpenSSL. It comes from a talk they gave at the OpenSSL conference in October 2025 (YouTube video). The post goes into a lot of detail about the problems with the OpenSSL code base and testing, which has led the cryptography team to reconsider using the library. "The mistakes we see in OpenSSL's development have become so significant that we believe substantial changes are required — either to OpenSSL, or to our reliance on it." They go further in the conclusion:
First, we will no longer require OpenSSL implementations for new functionality. Where we deem it desirable, we will add new APIs that are only on LibreSSL/BoringSSL/AWS-LC. Concretely, we expect to add ML-KEM and ML-DSA APIs that are only available with LibreSSL/BoringSSL/AWS-LC, and not with OpenSSL.

Second, we currently statically link a copy of OpenSSL in our wheels (binary artifacts). We are beginning the process of looking into what would be required to change our wheels to link against one of the OpenSSL forks.

If we are able to successfully switch to one of OpenSSL's forks for our binary wheels, we will begin considering the circumstances under which we would drop support for OpenSSL entirely.

Reçu hier — 14 janvier 2026LWN

[$] Format-specific compression with OpenZL

Par :jake
14 janvier 2026 à 17:51
Lossless data compression is an important tool for reducing the storage requirements of the world's ever-growing data sets. Yann Collet developed the LZ4 algorithm and designed the Zstandard (or Zstd) algorithm; he came to the 2025 Open Source Summit Japan in Tokyo to talk about where data compression goes from here. It turns out that we have reached a point where general-purpose algorithms are only going to provide limited improvement; for significant increases in compression, while keeping computation costs within reason for data-center use, turning to format-specific techniques will be needed.

[$] Debian discusses removing GTK 2 for forky

Par :jzb
14 janvier 2026 à 16:08

The Debian GNOME team would like to remove the GTK 2 graphics toolkit, which has been unmaintained upstream for more than five years, and ship Debian 14 ("forky") without it. As one might expect, however, there are those who would like to find a way to keep it. Despite its age and declared obsolescence, quite a few Debian packages still depend on GTK 2. Many of those applications are unlikely to be updated, and users are not eager to give them up. Discussion about how to handle this is ongoing; it seems likely that Debian developers will find some way to continue supporting applications that require GTK 2, but users may have to look outside official Debian repositories.

Security updates for Wednesday

Par :jzb
14 janvier 2026 à 14:05
Security updates have been issued by AlmaLinux (sssd), Debian (linux-6.1 and python-parsl), Fedora (chezmoi, complyctl, composer, and firefox), Oracle (kernel), Red Hat (buildah, libpq, podman, postgresql, postgresql16, postgresql:13, postgresql:15, and postgresql:16), SUSE (avahi, curl, ffmpeg-4, ffmpeg-7, firefox, istioctl, k6, kubelogin, libmicrohttpd, libpcap-devel, libpng16, libtasn1-6-32bit, matio, ovmf, python-tornado6, python311-Authlib, and teleport), and Ubuntu (angular.js, python-urllib3, and webkit2gtk).
Reçu avant avant-hierLWN

[$] A high-level quality-of-service interface

Par :daroc
13 janvier 2026 à 19:04

Quality-of-service (QoS) mechanisms attempt to prioritize some processes (or network traffic, disk I/O, etc.) over others in order to meet a system's performance goals. This is a difficult topic to handle in the world of Linux, where workloads, hardware, and user expectations vary wildly. Qais Yousef spoke at the 2025 Linux Plumbers Conference, alongside his collaborators John Stultz, Steven Rostedt, and Vincent Guittot, about their plans for introducing a high-level QoS API for Linux in a way that leaves end users in control of its configuration. The talk focused specifically on a QoS mechanism for the scheduler, to prioritize access to CPU resources differently for different kinds of processes. (slides; video)

Firefox 147 released

Par :jzb
13 janvier 2026 à 15:13

Version 147.0 of the Firefox web browser has been released. Notable changes in this release include support for the XDG Base Directory specification, enabling local network access restrictions for users with enhanced tracking protection (ETP) set to "Strict", and a fix that improves Firefox's rendering with GNOME on fractionally scaled displays. Firefox 147 also includes a number of security fixes, including several sandbox-escape vulnerabilities.

Security updates for Tuesday

Par :jzb
13 janvier 2026 à 14:03
Security updates have been issued by AlmaLinux (mariadb10.11, mariadb:10.11, mariadb:10.3, mariadb:10.5, and tar), Debian (net-snmp), Fedora (coturn, NetworkManager-l2tp, openssh, and tuxanci), Mageia (libtasn1), Oracle (buildah, cups, httpd, kernel, libpq, libsoup, libsoup3, mariadb:10.11, mariadb:10.3, openssl, and podman), SUSE (cpp-httplib, ImageMagick, libtasn1, python-cbor2, util-linux, valkey, and wget2), and Ubuntu (google-guest-agent, linux-iot, and python-urllib3).

[$] Asciinema: making movies at the command-line

Par :jzb
12 janvier 2026 à 17:30

In open-source circles there are many situations, such as bug reports, demos, and tutorials, when one might want to provide a play-by-play of a session in one's terminal. The asciinema project provides a set of tools to do just that. Its tools let users record, edit, and share terminal sessions in a text-based format that has quite a few advantages compared to making and sharing videos of terminal sessions. For example, it is easy to use, offers the ability to search text from recorded sessions, and allows users to copy and paste directly from the recording.

Security updates for Monday

Par :jzb
12 janvier 2026 à 14:14
Security updates have been issued by Debian (chromium and sogo), Fedora (chromium, foomuuri, libpng, libsodium, mariadb10.11, musescore, nginx, python-pdfminer, python-urllib3, python3.12, seamonkey, wasmedge, and wget2), Mageia (curl, libpcap, sodium, wget2, and zlib), Slackware (lcms2), SUSE (chromedriver, chromium, noopenh264, coredns, curl, dcmtk, fontforge, gdk-pixbuf-loader-libheif, gimp, kernel, libheif, libpng16, libsoup-2_4-1, libvirt, mariadb, php8, poppler, python-filelock, python-tornado6, python311-aiohttp, qemu, sssd, and traefik), and Ubuntu (libheif, libtasn1-6, linux-azure-nvidia, linux-kvm, linux-raspi, linux-raspi-realtime, and php7.2, php7.4, php8.1, php8.3, php8.4).

Evans: A data model for Git (and other docs updates)

Par :jake
10 janvier 2026 à 01:06
On her blog, Julia Evans writes about improving Git documentation, including a new data model man page she wrote with Marie LeBlanc Flanagan, and updates to the pages for several other Git sub-commands (add, checkout, push, and pull). As part of the process, she asked Git users to describe problems they had run into in the documentation, which helped guide the changes that she made.
I'm excited about this because understanding how Git organizes its commit and branch data has really helped me reason about how Git works over the years, and I think it's important to have a short (1600 words!) version of the data model that's accurate.

The "accurate" part turned out to not be that easy: I knew the basics of how Git's data model worked, but during the review process I learned some new details and had to make quite a few changes (for example how merge conflicts are stored in the staging area).

[$] READ_ONCE(), WRITE_ONCE(), but not for Rust

Par :corbet
9 janvier 2026 à 15:47
The READ_ONCE() and WRITE_ONCE() macros are heavily used within the kernel; there are nearly 8,000 call sites for READ_ONCE(). They are key to the implementation of many lockless algorithms and can be necessary for some types of device-memory access. So one might think that, as the amount of Rust code in the kernel increases, there would be a place for Rust versions of these macros as well. The truth of the matter, though, is that the Rust community seems to want to take a different approach to concurrent data access.
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