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Linux 5.13 and More

Submitted by Roy Schestowitz on Wednesday 28th of April 2021 04:29:19 PM Filed under
Linux
  • Linux 5.13 Introducing Misc Cgroup Controller - Phoronix

    The Linux 5.13 development kernel is introducing a new "misc" cgroup controller. The misc cgroup controller is to be used for resources that are controlled by simply counting / limiting the number of resource instances in a scalar manner.

    This cgroup controller can be used for purposes like tracking/limiting the number of enclaves on the system based upon hardware constraints, The initial user of this misc cgroup controller is for address space IDs used for virtual machine memory encryption.

  • Linux 5.13 Lands Support For Randomizing Stack Offsets Per Syscall - Phoronix

    One of the new security features in Linux 5.13 is the ability to randomize kernel stack offsets at each system call. This optional feature is now mainlined.

    Randomizing the kernel stack offset per-system-call is intended to make it more challenging for rogue actors to carry out stack-based attacks on the Linux kernel. This has been in the works for over two years and was inspired by PaX's "RANDKSTACK" feature but the actual implementation has taken a different approach. Simply put though this randomizing of the kernel stack at each system call is to fend off exploits relying on kernel stack determinism.

  • Linux is Turning 30 Years Old & Printk Is Still Being Refined - Phoronix

    The printk() function dates all the way back to the original Linux kernel release and even with Linux turning thirty years old this week, work on printk is not over.

    Back during Linux 5.10 last year a long overdue revamp of printk() began to land and now with Linux 5.13 more of that work is crossing the finish line. In 5.10 the ring-buffer became fully lock-less but still relying on a log buffer lock.

  • Linux kernel vulnerability exposes stack memory, causes data leaks | ZDNet

    Disclosed by Cisco Talos researchers on Tuesday, the bug is described as an information disclosure vulnerability "that could allow an attacker to view Kernel stack memory."

    The kernel is a key component of the open source Linux operating system. The vulnerability, tracked as CVE-2020-28588, was found in the proc/pid/syscall functionality of 32-bit ARM devices running the OS.

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today's howtos

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    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.

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