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Linux Kernel Security and Booting

Submitted by Roy Schestowitz on Sunday 12th of December 2021 02:09:08 AM Filed under
Linux
  • x86 Straight-Line Speculation Mitigation On Track For Linux 5.17 - Phoronix

    The recent activity around x86 (x86_64 included) straight-line speculation mitigation handling is set to culminate with this security feature being set for mainline with the upcoming Linux 5.17 cycle.

    Recent weeks have seen x86 straight-line speculation mitigations underway by compiler developers and the Linux kernel folks. This is similar to the Arm straight-line speculation "SLS" vulnerability and mitigation of last year but now seeing similar activity on the x86/x86_64 front for Intel and AMD.

    The issue at hand is over processors speculatively executing instructions linearly in memory past an unconditional change in control flow. GCC 12 landed its compiler mitigation option and LLVM Clang is doing the same. The compilers are introducing a "-mharden-sls" option to add INT3 instructions after function returns and indirect branches to protect against possible straight-line speculation.

  • Linux boot times are about to get a whole lot faster on monster AMD EPYC and Intel Xeon rigs - Neowin

    A patch to improve the boot times on massively parallel Linux systems is currently being prepared and initial performance numbers are extremely impressive. The patch isn't exactly new though and has been in the making since at least February of this year.

    It will improve the effective utilization of many-core/thread server and workstation processor systems, like those based on AMD's EPYC / Ryzen Threadripper, and Intel's Xeon, while booting. On a 96-threaded Skylake system, the patch reduced the Bringup time (wake up time) for the cores from 500ms down to just 34ms, which is around a factor of 15.

  • [libreboot] Translations wanted

    The libreboot website is currently only available in English.

    I’ve recently added support for translations to the Untitled Static Site Generator, which the Libreboot website uses. Pages on libreboot.org are written in Markdown, and this software generates HTML pages.

    This very page that you are reading was created this way!

  • SeaBIOS 1.15 Released With Better NVMe & USB Device Support - Phoronix

    SeaBIOS 1.15 is the open-source project's first release in sixteen months. Highlights of SeaBIOS 1.15 include better support for USB devices with multiple interfaces, support for USB xHCI devices using direct MMIO access, NVMe support improvements, and increased "f-segment" RAM allocations for BIOS tables. Plus there is the usual assortment of bug fixes and code clean-ups that have come about over the past year.

»

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today's howtos

  • How to install go1.19beta on Ubuntu 22.04 – NextGenTips

    In this tutorial, we are going to explore how to install go on Ubuntu 22.04 Golang is an open-source programming language that is easy to learn and use. It is built-in concurrency and has a robust standard library. It is reliable, builds fast, and efficient software that scales fast. Its concurrency mechanisms make it easy to write programs that get the most out of multicore and networked machines, while its novel-type systems enable flexible and modular program constructions. Go compiles quickly to machine code and has the convenience of garbage collection and the power of run-time reflection. In this guide, we are going to learn how to install golang 1.19beta on Ubuntu 22.04. Go 1.19beta1 is not yet released. There is so much work in progress with all the documentation.

  • molecule test: failed to connect to bus in systemd container - openQA bites

    Ansible Molecule is a project to help you test your ansible roles. I’m using molecule for automatically testing the ansible roles of geekoops.

  • How To Install MongoDB on AlmaLinux 9 - idroot

    In this tutorial, we will show you how to install MongoDB on AlmaLinux 9. For those of you who didn’t know, MongoDB is a high-performance, highly scalable document-oriented NoSQL database. Unlike in SQL databases where data is stored in rows and columns inside tables, in MongoDB, data is structured in JSON-like format inside records which are referred to as documents. The open-source attribute of MongoDB as a database software makes it an ideal candidate for almost any database-related project. This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you the step-by-step installation of the MongoDB NoSQL database on AlmaLinux 9. You can follow the same instructions for CentOS and Rocky Linux.

  • An introduction (and how-to) to Plugin Loader for the Steam Deck. - Invidious
  • Self-host a Ghost Blog With Traefik

    Ghost is a very popular open-source content management system. Started as an alternative to WordPress and it went on to become an alternative to Substack by focusing on membership and newsletter. The creators of Ghost offer managed Pro hosting but it may not fit everyone's budget. Alternatively, you can self-host it on your own cloud servers. On Linux handbook, we already have a guide on deploying Ghost with Docker in a reverse proxy setup. Instead of Ngnix reverse proxy, you can also use another software called Traefik with Docker. It is a popular open-source cloud-native application proxy, API Gateway, Edge-router, and more. I use Traefik to secure my websites using an SSL certificate obtained from Let's Encrypt. Once deployed, Traefik can automatically manage your certificates and their renewals. In this tutorial, I'll share the necessary steps for deploying a Ghost blog with Docker and Traefik.

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