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AI Helping To Improve Linux's AMD Zen CPU Microarchitecture Detection

A request for comments (RFC) was sent out last night on the Linux kernel mailing list in seeking to clean-up the AMD Zen microarchitecture detection within the kernel. This is for enhancing the kernel where there are code paths specific to a certain generation of AMD Zen processors or select generations such as Zen 3 through Zen 5 CPUs. AI was leveraged in helping to clean-up this AMD Zen code in the Linux kernel...
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x86 Kernel Shadow Stacks Being Worked On For Linux As Powerful Control Flow Protection

Linux user-space for several years had shadow stack support for hardware-enforced control-flow enforcement in defending against return oriented programming (ROP) attacks. Intel Tigerlake and newer CPUs or AMD Zen 3 and newer have the necessary hardware shadow stacks support. Shadow stacks have been effective for helping user-space software fend ROP attacks while now there is new work toward bringing shadow stack support for kernel space on Linux...
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Several Linux Kernel Vulnerabilities Accidentally Posted To Public Kernel Mailing List

Seemingly as an accident, overnight several new Linux kernel vulnerability reports were posted to the public Linux kernel mailing list rather than the private security mailing list. The vulnerabilities have yet to be patched on mainline but at least in some cases there are patches undergoing testing or queued in "-next" branches. The CVSS scores are as high as 9.0...
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AMD Working On Ryzen Overclocking Driver For Linux

AMD recently published patches for the Linux kernel to implement AOD, an AMD Overclocking driver for Ryzen processors. Linux enthusiasts have long sought an official AMD Ryzen CPU overclocking driver for Linux akin to Ryzen Master on Windows and it's finally coming, at least from the kernel driver perspective...
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Meta Makes Improvements To Kernfs Scalability With Linux 7.4

Kernfs as the functions/frameworks used for creating pseudo file-systems on Linux like sysfs and configfs have seen some nice scalability work carried out by Meta. After Meta engineers discovered some system daemons getting stuck for minutes on their massive fleet of servers, they uncovered some scalability bottlenecks within Kernfs that now look to be resolved for Linux 7.4...
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