Language Selection

English French German Italian Portuguese Spanish

LWN

Syndicate content
LWN.net is a comprehensive source of news and opinions from and about the Linux community. This is the main LWN.net feed, listing all articles which are posted to the site front page.
Updated: 2 weeks 1 day ago

[$] Designing ELF modules

Tuesday 13th of March 2018 08:26:24 PM
The bpfilter proposal posted in February included a new type of kernel module that would run as a user-space program; its purpose is to parse and translate iptables rules under the kernel's control but in a contained, non-kernel setting. These "ELF modules" were reposted for review as a standalone patch set in early March. That review has happened; it is a good example of how community involvement can improve a special-purpose patch and turn it into a more generally useful feature.

An important Samba 4 security release

Tuesday 13th of March 2018 06:33:39 PM
Anybody running Samba 4 servers probably wants to take a look at this alert and upgrade their systems. "CVE-2018-1057: On a Samba 4 AD DC the LDAP server in all versions of Samba from 4.0.0 onwards incorrectly validates permissions to modify passwords over LDAP allowing authenticated users to change any other users' passwords, including administrative users."

Numerous vulnerabilities in AMD processors

Tuesday 13th of March 2018 06:30:27 PM
A company called CTS has disclosed a long series of vulnerabilities in AMD processors. "The chipset is a central component on Ryzen and Ryzen Pro workstations: it links the processor with hardware devices such as WiFi and network cards, making it an ideal target for malicious actors. The Ryzen chipset is currently being shipped with exploitable backdoors that could let attackers inject malicious code into the chip, providing them with a safe haven to operate from." See the associated white paper for more details.

Update: there are a lot of questions circulating about the actual severity of these vulnerabilities and the motivations of the people reporting them. It may not be time to panic quite yet.

Firefox 59 released

Tuesday 13th of March 2018 05:38:09 PM
Mozilla has released Firefox 59, the next iteration of Firefox Quantum. From the release notes: "On Firefox for desktop, we’ve improved page load times, added tools to annotate and crop your Firefox Screenshots, and made it easier to arrange your Top Sites on the Firefox Home page. On Firefox for Android, we’ve added support for sites that stream video using the HLS protocol."

[$] JupyterLab: ready for users

Tuesday 13th of March 2018 02:54:58 PM

In the recent article about Jupyter and its notebooks, we mentioned that a new interface, called JupyterLab, existed in what its developers described as an "early preview" stage. About two weeks after that article appeared, Project Jupyter made a significant announcement: JupyterLab is "ready for users". Users will find a more integrated environment for scientific computation that is also more easily extended. JupyterLab takes the Jupyter Notebook to a level of functionality that will propel it well into the next decade—and beyond.

Security updates for Tuesday

Tuesday 13th of March 2018 02:49:23 PM
Security updates have been issued by Debian (samba), Fedora (tor), openSUSE (glibc, mysql-connector-java, and shadow), Oracle (dhcp), Red Hat (bind, chromium-browser, and dhcp), Scientific Linux (dhcp), and SUSE (java-1_7_0-openjdk, java-1_8_0-ibm, and java-1_8_0-openjdk).

[$] Variable-length arrays and the max() mess

Monday 12th of March 2018 09:37:50 PM
Variable-length arrays (VLAs) have a non-constant size that is determined (and which can vary) at run time; they are supported by the ISO C99 standard. Use of VLAs in the kernel has long been discouraged but not prohibited, so there are naturally numerous VLA instances to be found. A recent push to remove VLAs from the kernel entirely has gained momentum, but it ran into an interesting snag on the way.

More in Tux Machines

today's howtos

Graphics: VC4 and AMDVLK Driver

  • VC4 display, VC5 kernel submitted
    For VC5, I renamed the kernel driver to “v3d” and submitted it to the kernel. Daniel Vetter came back right away with a bunch of useful feedback, and next week I’m resolving that feedback and continuing to work on the GMP support. On the vc4 front, I did the investigation of the HDL to determine that the OLED matrix applies before the gamma tables, so we can expose it in the DRM for Android’s color correction. Stefan was also interested in reworking his fencing patches to use syncobjs, so hopefully we can merge those and get DRM HWC support in mainline soon. I also pushed Gustavo’s patch for using the new core DRM infrastructure for async cursor updates. This doesn’t simplify our code much yet, but Boris has a series he’s working on that gets rid of a lot of custom vc4 display code by switching more code over to the new async support.
  • V3D DRM Driver Revised As It Works To Get Into The Mainline Kernel
    Eric Anholt of Broadcom has sent out his revised patches for the "V3D" DRM driver, which up until last week was known as the VC5 DRM driver. As explained last week, the VC5 driver components are being renamed to V3D since it ends up supporting more than just VC5 with Broadcom VC6 hardware already being supported too. Eric is making preparations to get this VideoCore driver into the mainline Linux kernel and he will then also rename the VC5 Gallium3D driver to V3D Gallium3D.
  • AMDVLK Driver Gets Fixed For Rise of the Tomb Raider Using Application Profiles
    With last week's release of Rise of the Tomb Raider on Linux ported by Feral Interactive, when it came to Radeon GPU support for this Vulkan-only Linux game port the Mesa RADV driver was supported while the official AMDVLK driver would lead to GPU hangs. That's now been fixed. With the latest AMDVLK/XGL source code as of today, the GPU hang issue for Rise of the Tomb Raider should now be resolved.

AMD Ryzen 7 2700X Linux Performance Boosted By Updated BIOS/AGESA

With last week's initial launch-day Linux benchmarks of the Ryzen 5 2600X / Ryzen 7 2700X some found the Linux performance to be lower than Windows. While the root cause is undetermined, a BIOS/AGESA update does appear to help the Linux performance significantly at least with the motherboard where I've been doing most of my tests with the Ryzen 7 2700X. Here are the latest benchmark numbers. Read more

GNU: The GNU C Library 2.28 and Guix on Android

  • Glibc 2.28 Upstream Will Build/Run Cleanly On GNU Hurd
    While Linux distributions are still migrating to Glibc 2.27, in the two months since the release changes have continued building up for what will eventually become the GNU C Library 2.28. The Glibc 2.28 work queued thus far isn't nearly as exciting as all the performance optimizations and more introduced with Glibc 2.27, but it's a start. Most notable at this point for Glibc 2.28 is that it will now build and run cleanly on GNU/Hurd without requiring any out-of-tree patches. There has been a ton of Hurd-related commits to Glibc over the past month.
  • Guix on Android!
    Last year I thought to myself: since my phone is just a computer running an operating system called Android (or Replicant!), and that Android is based on a Linux kernel, it's just another foreign distribution I could install GNU Guix on, right? It turned out it was absolutely the case. Today I was reminded on IRC of my attempt last year at installing GNU Guix on my phone. Hence this blog post. I'll try to give you all the knowledge and commands required to install it on your own Android device.
  • GNU Guix Wrangled To Run On Android
    The GNU Guix transactional package manager can be made to run on Android smartphones/tablets, but not without lots of hoops to jump through first.