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Kernel: Intel SGX, Swapfile Problem, and Security Fixes

     
  • Intel Sends Out KVM SGX Virtualization Patches For Linux - Phoronix

    Intel SGX support finally landed in Linux 5.11 after going through 40+ rounds of review that took years for bringing up Software Guard Extensions in the mainline kernel. But that trek isn't yet over as Intel is now working on KVM SGX virtualization support to be upstreamed.  Intel earlier sent out a "request for comments" on KVM SGX virtualization support while on Monday they sent out the first formal (non-RFC) patch series with this support for handling Software Guard Extensions in the context of KVM virtualization. Basically this allows for a portion of the system memory to be encrypted with an SGX enclave exclusively for a KVM guest virtual machine that can't be accessed outside of the secure enclave. Separate from SGX enclaves, Intel also has coming out with future CPUs the Total Memory Encryption (TME) feature. AMD meanwhile has been working on Secure Encrypted Virtualization (SEV) with Secure Memory Encryption (SME) as their EPYC approach for securing guest VM memory from other VMs or the host. 

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  • Linux 5.12 Lands Fix For File-System Corruption Caused By Swapfile Issue - Phoronix

    For those wanting to help in testing out the Linux 5.12 kernel, at least it should no longer eat your data now if you rely on a swapfile.  The file-system corruption issue on Linux 5.12 Git noted last week and then followed up on yesterday when the corruption hit Intel's graphics CI systems and narrowed down to a set of swap-related changes, has now been resolved with today's latest Git code.  [...] With that fix now in, we can get back to looking at Linux 5.12 performance changes and other more interesting testing than worrying about data loss.

  • High severity Linux network security holes found, fixed | ZDNet

    Young and rising Linux security developer Alexander Popov of Russia's Positive Technologies discovered and fixed a set of five security holes in the Linux kernel's virtual socket implementation. An attacker could use these vulnerabilities (CVE-2021-26708) to gain root access and knock out servers in a Denial of Service (DoS) attack.

Games: Drova - Forsaken Kin, Core Defense, and Proton Stuff

  • Drova - Forsaken Kin is an upcoming pixel-art RPG with 'high player agency'

    Ready to try another demo of a promising upcoming game? The developer of Drova - Forsaken Kin emailed in about their pixel-art RPG and it sounds pretty promising. They mention that it's a pixel art RPG that "focuses on investigative exploration and combat with high player agency", with you choosing a side in a changing world "devoured by Ether, the essence of creation itself getting out of control when an ancient threat returns". So what they're saying is the world is dynamic, it changes and you have an effect on things - something like that. [...] The developer, Just2D, mentioned how they've put "a lot of effort into Linux compatibility" so hopefully that works out well for them.

  • Top 6 New Games You Can Play With Proton Since Feb. 2021

    Valheim is a bit of a different beast in that list. It has a Linux client in the first place, but there’s apparently enough people who had trouble with it not working properly that they ended up falling back on Proton (and it looks like it works perfectly under Proton). So, do not take this as a recommendation to play the game on Proton, but simply as an alternative in case you have issues.

  • Tower Defense with deck-building 'Core Defense' set to get an expansion

    Core Defense, a positively rated tower defense game by users (and one we enjoyed) from developer ehmprah that sprinkles in a little deck-building is getting an expansion with a Beta you can try. Quite different to most tower defense games, as the placement of almost everything is down to you. You're building up a maze for enemy units to travel through, and then each round you pick from a set of cards that can give you new towers, abilities and more. It was a success too, earning the developer over $20K in the first week on Steam, clearly hit a mark.

  • Another Proton Experimental update is out improving VR and controllers

    Proton Experimental is the extra special testing area where new fixes and features enter the Steam Play Proton compatibility layer before going out to everyone and there's a new update out. If you're not clear on what Proton and Steam Play are, be sure to check out our constantly updated dedicated page. It's a special compatibility layer for running Windows games and apps from Steam on Linux.

today's howtos

  • How to install Kali Linux 2021.1

    In this video, I am going to show how to install Kali Linux 2021.1.

  • Arch Linux: Full Installation Guide - A complete tutorial/walkthrough in one video!

    "I run Arch!" You hear everyone else saying it, now you can say it too! In this video, we'll go through the process of setting up Arch Linux from scratch. It'll start at the command-line, and we'll build the installation all the way up to a full desktop environment!

  • How To Set Up Redis as a Cache for MySQL with PHP on Ubuntu 20.04

    Redis is an open-source and in-memory data structure store that can be used for caching, real-time analytics, searching, and machine learning. Integrate Redis with PHP and MySQL will improve your application performance because Redis stores data in RAM. You can use it with databases like MySQL or MariaDB. Redis provides a mechanism to cache your queries. For example, when a user requests your application page the first time, a MySQL query is performed on the server, and Redis caches this query to RAM. When another user requests the same page, you don’t need to query the database again.

  • 7 Ways to Customize Cinnamon Desktop in Linux

    Linux Mint is one the best Linux distributions for beginners. Especially Windows users that want to switch to Linux, will find its flagship Cinnamon desktop environment very familiar. Cinnamon gives a traditional desktop experience and many users like it as it is. It doesn’t mean you have to content with what it provides. Cinnamon provides several ways for customizing the desktop.

  • How to install Toontown Rewritten on a Chromebook

    Today we are looking at how to install Toontown Rewritten on a Chromebook. Please follow the video/audio guide as a tutorial where we explain the process step by step and use the commands below.

  • How to install the Brave Beta Browser on Linux Mint 20.1 - YouTube

    In this video, we are looking at how to install the Brave Beta Browser on Linux Mint 20.1.

Security Patches and Bugs

  • Security updates for Wednesday [LWN.net]

    Security updates have been issued by CentOS (bind), Debian (adminer, grub2, spip, and wpa), Mageia (openjpeg2, wpa_supplicant, and xterm), openSUSE (avahi, bind, firefox, ImageMagick, java-1_8_0-openjdk, nodejs10, and webkit2gtk3), Red Hat (container-tools:1.0, container-tools:2.0, grub2, and virt:rhel and virt-devel:rhel), SUSE (bind, gnome-autoar, grub2, and nodejs8), and Ubuntu (python2.7 and wpa).

  • Now-fixed Linux kernel vulnerabilities enabled local privilege escalation (CVE-2021-26708)

    The vulnerabilities could be exploited for local privilege escalation, as confirmed in experiments on Fedora 33 Server. The vulnerabilities, known together as CVE-2021-26708, have received a CVSS v3 base score of 7.0 (high severity). These vulnerabilities result from race conditions that were implicitly added with virtual socket multi-transport support. They appeared in Linux kernel version 5.5 in November 2019. The vulnerable kernel drivers (CONFIG_VSOCKETS and CONFIG_VIRTIO_VSOCKETS) are shipped as kernel modules in all major GNU/Linux distributions. The vulnerable modules are automatically loaded when an AF_VSOCK socket is created. This ability is available to unprivileged users.

  • Researchers discover and patch Linux kernel vulnerabilities | 2021-03-03