Hacker News with Generative AI: Kernel

Fiwix: Small Unix-Like Kernel (fiwix.org)
Fiwix is an operating system kernel written from scratch, based on the UNIX architecture and fully focused on being POSIX compatible.
Operating Systems, Unix, Kernel
79 points by coolcoder613 16 days ago | 40 comments
Geico Developing TuxTape – A New Linux Kernel Livepatching Solution (phoronix.com)
Prominent US insurance company GEICO has been working on TuxTape as a new Linux kernel livepatching toolkit.
Linux, Open Source, Security, Software, Kernel
12 points by LorenDB 17 days ago | 0 comments
Resistance to Rust abstractions for DMA mapping (lwn.net)
While the path toward the ability to write device drivers in Rust has been anything but smooth, steady progress has been made and that goal is close to being achieved — for some types of drivers at least. Device drivers need to be able to set up memory areas for direct memory access (DMA) transfers, though; that means Rust drivers will need a set of abstractions to interface with the kernel's DMA-mapping subsystem.
Rust, Device Drivers, Kernel, DMA, Programming
95 points by mustache_kimono 18 days ago | 93 comments
Resistance to Rust abstractions for DMA mapping (lwn.net)
While the path toward the ability to write device drivers in Rust has been anything but smooth, steady progress has been made and that goal is close to being achieved — for some types of drivers at least. Device drivers need to be able to set up memory areas for direct memory access (DMA) transfers, though; that means Rust drivers will need a set of abstractions to interface with the kernel's DMA-mapping subsystem.
Rust, Device Drivers, DMA, Operating Systems, Kernel
12 points by ZeroCool2u 18 days ago | 1 comments
Susctl CVE-2024-54507: A particularly 'sus' sysctl in the XNU kernel (jprx.io)
Every time Apple releases a new version of XNU, I run a custom suite of tests under an address sanitizer to see if I can spot any regressions, or even possibly new bugs.
Security, Apple, XNU, Kernel, Bugs
148 points by jprx 29 days ago | 41 comments
Why is my CPU usage always 100%? (downtowndougbrown.com)
If you’re new to this series, I’ve been documenting the process I went through upgrading my old PXA166-based Chumby 8’s 2.6.28 Linux kernel to a modern 6.x version.
Troubleshooting, Linux, Kernel, Hardware
537 points by pncnmnp 43 days ago | 142 comments
Failing Randomly: Linux Seccomp and Kernel Hacking (mejedi.dev)
Seccomp filters system calls with cBPF code. One can blacklist certain system call numbers or even make a decision based on call arguments. Both Docker and Chromium use seccomp to protect host from malicious or misbehaving programs.
Security, Linux, Kernel, Programming, Security
9 points by rapidlua 65 days ago | 0 comments
Linux 6.13 Staging Clears 107k Lines of Code from Old and Unmaintained Drivers (phoronix.com)
Just a quick reminder this "Black Friday" if you would like to help show your support.
Linux, Operating Systems, Software Development, Kernel, Open Source
4 points by ksec 84 days ago | 1 comments
The Case for a High-Level Kernel-Bypass I/O Abstraction (irenezhang.net)
After chatting with people at HotOS, I was inspired to write this blog post summarizing my HotOS paper. At a high-level, the HotOS paper advocates for a new high-level I/O abstraction for kernel-bypass.
Operating Systems, Kernel, I/O
16 points by thunderbong 90 days ago | 1 comments
How to build a custom kernel for WSL in 2025 (boxofcables.dev)
Thanks to the WSL System Distro, we no longer need distro-specific instructions to build a WSL custom kernel.
Windows, Linux, Kernel, WSL
5 points by pengwinhayden 90 days ago | 3 comments
Linux Kernel 6.12 Has Landed – and It's a Big One (omgubuntu.co.uk)
Linus Torvalds has announced the release of Linux kernel 6.12, and an eclectic assortment of changes contained within make it one of the most biggest kernel releases for a while.
Linux, Kernel, Software Releases, Open Source
11 points by signa11 96 days ago | 2 comments
Linux Fixes Hosts Randomly Rebooting During Virtualization with Ryzen 7000/8000 (phoronix.com)
Ahead of the Linux 6.12 kernel release expected today there is a last minute "x86/urgent" pull request.
Linux, Virtualization, Ryzen, Kernel, Hardware
4 points by LinuxBender 96 days ago | 3 comments
Linux 6.12 Released with Real-Time Capabilities, Sched_Ext, AMD RDNA4 and More (phoronix.com)
As expected, minutes ago Linus Torvalds just released the Linux 6.12 kernel as stable. Linux 6.12 brings many new features, new hardware support, and is rounded out by the fact of expected to become this year's Long Term Support (LTS) kernel version.
Linux, Kernel, Hardware, Software, Real-time
10 points by sandwichsphinx 96 days ago | 1 comments
An attempt to backdoor the kernel (2003) (lwn.net)
Someone recently made an attempt to add a local root backdoor to the Linux kernel, by making a checkin to the subsidiary CVS repository under someone else's name. Fortunately, the master repository is on Linus' computer, behind a firewall, and the automated tracking of BitKeeper, the source control system, caught the illegal change.
Security, Linux, Kernel, Open Source
32 points by pbrowne011 101 days ago | 0 comments
Intel Spots 3888.9% Performance Improvement in Linux Kernel from 1 Line of Code (phoronix.com)
Intel's Linux kernel test robot has reported a 3888.9% performance improvement in the mainline Linux kernel as of this past week.
Linux, Kernel, Performance, Optimization, Intel
7 points by croes 102 days ago | 0 comments
Intel Spots a 3888% Performance Improvement in the Linux Kernel (phoronix.com)
Intel's Linux kernel test robot has reported a 3888.9% performance improvement in the mainline Linux kernel as of this past week.
Linux, Performance, Kernel, Intel
19 points by redbell 104 days ago | 3 comments
x86 Early Kernel Boot Process with Microcode, ACPI Overrides, and Initrd (labcsmart.com)
In this third installment of our x86 Platforms series, following Part 2: UEFI Bootloader Management and Integration with Yocto, we’re going to explore the early kernel boot process in more depth. Specifically, we’ll cover how x86 systems handle microcode updates, ACPI table overrides, and the initrd (initial RAM disk). These elements are critical for configuring the CPU, hardware, and the system during the boot process.
Operating Systems, x86 Architecture, Boot Process, Kernel, Hardware
12 points by transpute 119 days ago | 2 comments
SELinux bypasses (klecko.github.io)
This post aims at giving an overview of what SELinux is, how it is implemented, and how to bypass it, from the point of view of Android kernel exploitation.
Security, Android, Exploitation, Kernel
185 points by voxadam 119 days ago | 56 comments
A deep dive into Linux's new mseal syscall (trailofbits.com)
If you love exploit mitigations, you may have heard of a new system call named mseal landing into the Linux kernel’s 6.10 release, providing a protection called “memory sealing.” Beyond notes from the authors, very little information about this mitigation exists. In this blog post, we’ll explain what this syscall is, including how it’s different from prior memory protection schemes and how it works in the kernel to protect virtual memory.
Linux, Security, Kernel, Operating Systems, Memory Management
252 points by todsacerdoti 119 days ago | 54 comments
ReiserFS File-System Expected to Be Removed with Linux 6.13 (phoronix.com)
With ReiserFS having been deprecated for two years with plans to remove it in 2025, the upcoming Linux 6.13 cycle for what will be the first major kernel release of the new year and past the Linux 6.12 LTS kernel is expected to do just that... ReiserFS is set to be stripped from the mainline kernel codebase.
Linux, Operating Systems, Kernel, File Systems
6 points by mfiguiere 124 days ago | 1 comments
The Case for a High-Level Kernel-Bypass I/O Abstraction (irenezhang.net)
After chatting with people at HotOS, I was inspired to write this blog post summarizing my HotOS paper. At a high-level, the HotOS paper advocates for a new high-level I/O abstraction for kernel-bypass.
Operating Systems, Kernel, I/O
16 points by adamch 137 days ago | 2 comments
Real-Time "Preempt_rt" Support Merged for Linux 6.12 (phoronix.com)
After many years in the making, it finally was merged overnight... The real-time "PREEMPT_RT" kernel support was merged a few hours ago into Linux Git for this year's Linux 6.12 kernel!
Linux, Operating Systems, Kernel, Real-Time
10 points by marcodiego 154 days ago | 0 comments
Real-time Linux is officially part of the kernel (arstechnica.com)
As is so often the case, a notable change in an upcoming Linux kernel is both historic and no big deal.
Linux, Operating Systems, Kernel
503 points by jonbaer 155 days ago | 138 comments
CrowdStrike outage leads Microsoft plan security capabilities outside of kernel (scmagazine.com)
In light of the CrowdStrike outage incident in July, Microsoft is planning to develop more options for security solutions to operate outside of kernel mode, according to a post on the Windows Experience Blog published Thursday.
Cybersecurity, Microsoft, Kernel, CrowdStrike, Security Solutions
4 points by LinuxBender 159 days ago | 0 comments
Linux 6.11 Released (lwn.net)
Linus has released the 6.11 kernel.
Linux, Operating Systems, Software, Kernel
299 points by jrepinc 159 days ago | 119 comments
Updated Patches Allow Compiling the Linux Kernel from Within macOS (phoronix.com)
Updated patches allow compiling the Linux kernel from within macOS.
macOS, Linux, Kernel, Software Development, Operating Systems
6 points by jamesy0ung 168 days ago | 1 comments
AmpereOne Performance on Linux 6.11 Kernel, 4K vs. 64K Page Size Comparison (phoronix.com)
Continuing on with the AmpereOne performance benchmarking while having the AmpereOne A192-32X in the lab within a Supermicro ARS-211M-NR R13SPD server, the next set of benchmarks is looking at the performance when using the near-final Linux 6.11 kernel. Additionally, quantifying the performance impact of using the ARM64 64K page size kernel as an alternative to the default 4K page size.
Linux, Kernel, Performance, Benchmarking, Server
6 points by rbanffy 169 days ago | 0 comments
Linux 6.12 to Optionally Display a QR Code During Kernel Panics (phoronix.com)
Linux, Operating Systems, Kernel, QR Codes
27 points by LinuxBender 176 days ago | 3 comments
How we found and fixed an eBPF Linux kernel vulnerability (bughunters.google.com)
Security, Linux, Kernel, Vulnerability
268 points by xxmarkuski 197 days ago | 65 comments
New SLUBStick Attack Makes Linux Kernel Vulnerabilities More Dangerous (securityweek.com)
Security, Linux, Kernel, Vulnerabilities
5 points by LinuxBender 200 days ago | 0 comments