A Batch Of x86 Speculation Fixes Headed To The Linux 4.19 Kernel
Written by Michael Larabel in Linux Kernel on 2 September 2018 at 11:24 AM EDT. 4 Comments
LINUX KERNEL --
Thomas Gleixner has submitted a batch of x86 fixes today to the Linux 4.19 kernel, which include several changes around the speculative execution vulnerability mitigations.

The x86 speculation fixes for Linux 4.19 include making some checks more robust, a fix for the Foreshadow / L1 Terminal Fault (L1TF) mitigation so it doesn't get disabled on systems utilizing the full physical address space, a fix for the new 32-bit PTI support for Meltdown, and also another fix.

There are also several other more general x86 fixes too around the Kernel Address Sanitizer (KASAN), preventing kernel memory dumps based on user-mode RIP, and other items.

The complete list of changes can be found via this pull request. The pull will presumably be honored ahead of today's expected Linux 4.19-rc2 kernel release.
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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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