Vue normale

Reçu hier — 5 juin 2025LWN

[$] Zero-copy for FUSE

Par :jake
5 juin 2025 à 22:12
In a combined storage and filesystem session at the 2025 Linux Storage, Filesystem, Memory Management, and BPF Summit (LSFMM+BPF), Keith Busch led a discussion about zero-copy operations for the Filesystem in Userspace (FUSE) subsystem. The session was proposed by his colleague, David Wei, who could not make it to the summit, so Busch filled in, though he noted that "I do not really know FUSE so well". The idea is to eliminate data copies in the data path to and from the FUSE server in user space.

[$] Open source and the Cyber Resilience Act

Par :daroc
5 juin 2025 à 18:32

The European Union's Cyber Resilience Act (CRA) has caused a stir in the software-development world. Thanks to advocacy by the Eclipse Foundation, Open Source Initiative, Linux Foundation, Mozilla, and others, open-source software projects generally have minimal requirements under the CRA — but nothing to do with law is ever quite so simple. Marta Rybczyńska spoke at Linaro Connect 2025 about the impact of the CRA on the open-source ecosystem, with an emphasis on the importance of understanding a project's role under the CRA. She later participated in a panel discussion with Joakim Bech, Kate Stewart, and Mike Bursell about how the CRA would impact embedded open-source development.

[$] Fending off unwanted file descriptors

Par :corbet
5 juin 2025 à 13:52
One of the more obscure features provided by Unix-domain sockets is the ability to pass a file descriptor from one process to another. This feature is often used to provide access to a specific file or network connection to a process running in a relatively unprivileged context. But what if the recipient doesn't want a new file descriptor? A feature added for the 6.16 release makes it possible to refuse that offer.

Security updates for Thursday

Par :jake
5 juin 2025 à 13:36
Security updates have been issued by Debian (chromium and mariadb-10.5), Oracle (firefox, ghostscript, git, go-toolset:ol8, golang, kernel, krb5, mingw-freetype and spice-client-win, nodejs:20, nodejs:22, perl-CPAN, python36:3.6, rsync, varnish, and varnish:6), Red Hat (firefox, thunderbird, and webkit2gtk3), Slackware (curl and python3), SUSE (apache-commons-beanutils, apache2-mod_security2, avahi, buildkit, ca-certificates-mozilla, cloud-regionsrv-client, cloud-regionsrv-client, python-toml, containerd, containerized-data-importer, cups, curl, dnsmasq, docker, elemental-operator, elemental-toolkit, expat, firefox, freetype2, gdk-pixbuf, git, glib2, glibc, gnuplot, gnutls, gpg2, gstreamer, gstreamer-plugins-base, gtk3, haproxy, helm, java-17-openjdk, java-1_8_0-openjdk, keepalived, kernel, kernel-firmware, krb5, kubevirt, less, libarchive, libcryptopp, libdb-4_8, libndp, libpcap, libsoup, libtasn1, libvirt, libX11, libxml2, libxslt, Mesa, mozilla-nss, nghttp2, nvidia-open-driver-G06-signed, opensc, openssh, openssl-3, openssl-3, libpulp, ulp-macros, orc, pam, pam_pkcs11, pam_u2f, patch, pcp, pcr-oracle, shim, perl-Crypt-OpenSSL-RSA, podman, postgresql16, procps, protobuf, python-dnspython, python-Jinja2, python-requests, python-setuptools, python-tornado6, python-urllib3, python311, python311, python-rpm-macros, qemu, rsync, runc, rust-keylime, selinux-policy, sevctl, skopeo, sssd, SUSE Manager Client Tools, systemd, thunderbird, tiff, tpm2.0-tools, tpm2-0-tss, u-boot, ucode-intel, unbound, util-linux, vim, wget, and wpa_supplicant), and Ubuntu (linux-nvidia, python-django, twitter-bootstrap3, twitter-bootstrap4, and wireshark).

[$] LWN.net Weekly Edition for June 5, 2025

Par :corbet
5 juin 2025 à 01:11
Inside this week's LWN.net Weekly Edition:

  • Front: OpenH264 in Fedora; Wallabag; Safety certification; 6.16 Merge window; Bounce buffering; Hardening repository problems; Device-initiated I/O; Faster networking; OSPM 2025; Free software in science.
  • Briefs: Kea vulnerabilities; Alpine Linux 3.22.0; Fedora strategy; Quotes; ...
  • Announcements: Newsletters, conferences, security updates, patches, and more.
Reçu avant avant-hierLWN

[$] Device-initiated I/O

Par :jake
4 juin 2025 à 17:39
Peer-to-peer DMA (P2PDMA) has been part of the kernel since the 4.20 release in 2018; it provides a framework that allows devices to transfer data between themselves directly, without using system RAM for the transfer. At the 2025 Linux Storage, Filesystem, Memory Management, and BPF Summit (LSFMM+BPF), Stephen Bates led a combined storage, filesystems, and memory-management session on device-initiated I/O, which is perhaps what P2PDMA is evolving toward. Two years ago, he led a session on P2PDMA at the summit; this year's session was a brief update on P2PDMA with a look at where it may be heading.

Strategy 2028 update (Fedora Community Blog)

Par :jzb
4 juin 2025 à 14:54

Outgoing Fedora Project Leader Matthew Miller has posted an update on Fedora's high-level plan through 2028:

[Fedora] Council members identified potential Initiatives that we believe are important to work on next. We came up with a list of thirteen — which is way more than we can handle at once. We previously set a limit of four Initiatives at a time. We decided to keep to that rule, and are planning to launch four initiatives in the next months

The initiatives are: making Fedora releases block on accessibility issues, experimenting with a "GitOps" workflow for packaging, migrating from Pagure to Forgejo, and "making sure Fedora Linux is ready for people who want to work on machine learning and AI development".

[$] Two sessions on faster networking

Par :daroc
4 juin 2025 à 14:21

Cong Wang and Daniel Borkmann each led session at the 2025 Linux Storage, Filesystem, Memory Management, and BPF Summit about their respective plans to speed up networking in the Linux kernel. Both sessions described ways to remove unnecessary operations in the networking stack, but they focused on different areas. Wang spoke about using BPF to speed up socket operations, while Borkmann spoke about eliminating the overhead of networking operations on virtual machines.

[$] The importance of free software to science

Par :jake
4 juin 2025 à 14:16
Free software plays a critical role in science, both in research and in disseminating it. Aspects of software freedom are directly relevant to simulation, analysis, document preparation and preservation, security, reproducibility, and usability. Free software brings practical and specific advantages, beyond just its ideological roots, to science, while proprietary software comes with equally specific risks. As a practicing scientist, I would like to help others—scientists or not—see the benefits from free software in science.

Security updates for Wednesday

Par :jzb
4 juin 2025 à 13:13
Security updates have been issued by AlmaLinux (git, krb5, perl-CPAN, and rsync), Debian (tcpdf), Fedora (libmodsecurity, lua-http, microcode_ctl, and nextcloud), Red Hat (osbuild-composer), SUSE (389-ds, avahi, ca-certificates-mozilla, docker, expat, freetype2, glib2, gnuplot, gnutls, golang-github-teddysun-v2ray-plugin, golang-github-v2fly-v2ray-core, govulncheck-vulndb, helm, iperf, kernel, kernel-livepatch-MICRO-6-0_Update_2, kernel-livepatch-MICRO-6-0_Update_4, krb5, libarchive, libsoup, libsoup2, libtasn1, libX11, libxml2, libxslt, orc, podman, python-Jinja2, python-requests, python3-setuptools, python310, python311, python39, rubygem-rack, sslh, SUSE Manager Client Tools, SUSE Manager Client Tools and Salt Bundle, ucode-intel, util-linux, and wget), and Ubuntu (libvpx, linux, linux-aws, linux-aws-hwe, linux-gcp, linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle, linux, linux-aws, linux-azure, linux-gcp, linux-gke, linux-gkeop, linux-ibm, linux-intel-iotg, linux-kvm, linux-lowlatency, linux-nvidia-tegra, linux-oracle, linux, linux-aws, linux-kvm, linux-aws, linux-lts-xenial, linux-aws-fips, linux-azure-fips, linux-fips, linux-gcp-fips, linux-aws-fips, linux-gcp-fips, linux-azure-fde, linux-fips, and linux-intel-iot-realtime, linux-realtime).

[$] Safety certification for open-source systems

Par :daroc
3 juin 2025 à 14:41

This year's Linaro Connect in Lisbon, Portugal featured a number of talks about the use of open-source components in safety-critical systems. Kate Stewart gave a keynote on the topic on the first day of the conference. In it, she highlighted several projects that have been working to pursue safety certification and spoke about the importance of being able to trace software's origins to safety. In a talk on the second day, Roberto Bagnara shared his experience with working on one of those projects, the Xen hypervisor, to conform to a formal set of rules for safety-critical code.

Security updates for Tuesday

Par :corbet
3 juin 2025 à 13:14
Security updates have been issued by AlmaLinux (varnish), Debian (asterisk and roundcube), Fedora (systemd), Mageia (golang), Red Hat (ghostscript, perl-CPAN, python36:3.6, and rsync), SUSE (govulncheck-vulndb, libsoup-2_4-1, and postgresql, postgresql16, postgresql17), and Ubuntu (mariadb, open-vm-tools, php-twig, and python-tornado).

[$] Hardening fixes lead to hard questions

Par :corbet
2 juin 2025 à 16:55
Kees Cook's "hardening fixes" pull request for the 6.16 merge window looked like a straightforward exercise; it only contained four commits. So just about everybody was surprised when it resulted in Cook being temporarily blocked from his kernel.org account among fears of malicious activity. When the dust settled, though, the red alert was canceled. It turns out, surprisingly, that Git is a tool with which one can inflict substantial self-harm in a moment of inattention.

[$] OpenH264 induces headaches for Fedora

Par :jzb
2 juin 2025 à 15:57

Software patents and workarounds for them are, once again, causing headaches for open-source projects and users. This time around, Fedora users have been vulnerable to a serious flaw in the OpenH264 library for months—not for want of a fix, but because of the Rube Goldberg machine methodology of distributing the library to Fedora users. The software is open source under a two-clause BSD license; the RPMs are built and signed by Fedora, but the final product is distributed by Cisco, so the company can pick up the tab for license fees. Unfortunately, a breakdown in the process of handing RPMs to Cisco for distribution has left Fedora users vulnerable, and inaction on Fedora's part has left users unaware that they are at risk.

Security updates for Monday

Par :jake
2 juin 2025 à 13:39
Security updates have been issued by Debian (espeak-ng, kitty, kmail-account-wizard, krb5, libreoffice, libvpx, net-tools, python-flask-cors, symfony, tcpdf, thunderbird, and twitter-bootstrap3), Fedora (chromium, dropbear, firefox, gstreamer1-plugins-bad-free, python-tornado, systemd, and thunderbird), Mageia (coreutils, deluge, glib2.0, and redis), Oracle (firefox, kernel, and systemd), Red Hat (firefox, kernel, kernel-rt, varnish, varnish:6, and zlib), SUSE (bind, curl, dnsdist, docker, ffmpeg-7, firefox, glibc, golang-github-prometheus-alertmanager, govulncheck-vulndb, icinga2, iputils, java-11-openjdk, java-1_8_0-ibm, kea, kernel, libopenssl-3-devel, libsoup, libxml2, nodejs-electron, open-vm-tools, openbao, perl-Net-Dropbox-API, pluto, poppler, postgresql14, postgresql15, postgresql16, postgresql17, python312-setuptools, runc, s390-tools, skopeo, sqlite3, thunderbird, and unbound), and Ubuntu (apport and libphp-adodb).

[$] Out of Pocket and into the wallabag

Par :jzb
30 mai 2025 à 12:52

Mozilla has decided to throw in the towel on Pocket, a social-bookmarking service that it acquired in 2017. This has left many users scrambling for a replacement for Pocket before its shutdown in July. One possible option is wallabag, a self-hostable, MIT-licensed project for saving web content for later reading. It can import saved data from services like Pocket, share content on the web, export to various formats, and more. Even better, it puts users in control of their data long-term.

❌