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LWN.net

[$] Implicit arguments for BPF kfuncs

The kernel's "kfunc" mechanism is a way of exporting kernel functions so that they can be called directly from BPF programs. There are over 300 kfuncs in current kernels, ranging in functionality from string processing (bpf_strnlen()) to custom schedulers (scx_bpf_kick_cpu()) and beyond. Sometimes these kfuncs need access to context information that is not directly available to BPF programs, and which thus cannot be passed in as arguments. The implicit arguments patch set from Ihor Solodrai is the latest attempt to solve this problem.

LWN.net

Xfwl4: the roadmap for a Xfce Wayland compositor

The Xfce team has announced that it will be providing funding to Brian Tarricone to work on xfwl4, a Wayland compositor for Xfce: Xfwl4 will not be based on the existing xfwm4 code. Instead, it will be written from scratch in rust, using smithay building blocks. The first attempt at creating an Xfce Wayland compositor involved modifying the existing xfwm4 code to support both X11 and Wayland in parallel. However, this approach turned out to be the wrong path forward for several reasons: Xfwm4 is architected in a way that makes it very difficult to put the window management behavior behind generic interfaces that don't include X11 specifics. Refactoring Xfwm4 is risky, since it might introduce new bugs to X11. Having two parallel code bases will allow for rapid development and experimentation with the Wayland compositor, with zero risk to break xfwm4. Some X11 window management concepts just aren't available or supported by Wayland protocols at this time, and dealing with those differen

LWN.net

Security updates for Tuesday

Security updates have been issued by AlmaLinux (kernel, kernel-rt, python-urllib3, python3.11-urllib3, and python3.12-urllib3), Debian (imagemagick, openjdk-11, openjdk-17, and openjdk-21), Fedora (bind, bind-dyndb-ldap, chromium, ghostscript, glibc, mingw-glib2, mingw-harfbuzz, mingw-libsoup, mingw-openexr, and qownnotes), Mageia (kernel-linus), Red Hat (osbuild-composer), SUSE (go1.24-openssl, go1.25-openssl, govulncheck-vulndb, kernel, nodejs22, openCryptoki, openvswitch3, python-pyasn1, python311, and qemu), and Ubuntu (git-lfs, node-form-data, and screen).