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Kernel: AMD and Security

Submitted by Roy Schestowitz on Sunday 30th of January 2022 06:33:40 PM Filed under
Linux
  • AMD Publishes Latest Linux Patches For Enabling SEV-SNP Guest Support - Phoronix

    One of the additions with EPYC 7003 "Milan" processors introduced last year was SEV-SNP as the "Secure Nested Paging" addition to AMD's Secure Encrypted Virtualization found with EPYC processors. While they have maintained an out-of-tree Linux source repository with the SEV-SNP patches, the mainline kernel is still lacking support for these latest security features but the code continues to undergo revisions and review for its eventual upstreaming.

    Over SEV and SEV-ES "Encrypted State" introduced with prior EPYC processors, SEV-SNP is able to offer greater integrity with replay protection, data corruption safeguards, and fend off a variety of other possible attacks to VMs.

  • AMD Cooking Up A "PAN" Feature That Can Help Boost Linux Performance

    The proposed PAN is Process Adaptive autoNUMA and is an adaptive algorithm calculating the AutoNUMA scan period. AMD's Bharata B Rao further explained in the request for comments (RFC) Linux kernel patch series, "In this new approach (Process Adaptive autoNUMA or PAN), we gather NUMA fault stats at per-process level which allows for capturing the application behaviour better. In addition, the algorithm learns and adjusts the scan rate based on remote fault rate. By not sticking to a static threshold, the algorithm can respond better to different workload behaviours. Since the threads of a processes are already considered as a group, we add a bunch of metrics to the task's [memory management] to track the various types of faults and derive the scan rate from them. The new per-process fault stats contribute only to the per-process scan period calculation, while the existing per-thread stats continue to contribute towards the numa_group stats which eventually determine the thresholds for migrating memory and threads across nodes."

  • Enterprise Linux Security Episode 17 - Polkit & LUKS CVE's

    The New Year is just beginning, and we already have a few important CVE's to discuss, this time around Polkit and LUKS. The CVE numbers for these vulnerabilities are CVE-2021-4034 and CVE-2021-4122 respectively. In this episode, Jay and Joao discuss these vulnerabilities.

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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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