Linux Kernel Daily: KVM Hardening and Power Supply Fixes
Six merges land with no new features, centered on KVM x86 correctness and power measurement reliability. The highest impact is KVM plugging a use-after-free, a memory-tracking bypass, and host warnings on newer Hyper-V guests.
Duration: PT2M10S
Episode overview
This episode is a short developer briefing from Linux Kernel Daily.
It explains recent repository work in plain language.
- Show: Linux Kernel Daily
- Published: 2026-10-14T06:01:01Z
- Audio duration: PT2M10S
Transcript excerpt
This excerpt keeps the crawler page concise. Listen to the episode or use the RSS feed for the full update.
Good morning, it's October 14th, 2026.
The throughline today is defensive correctness. Virtualization closes small holes that could crash hosts or misclassify guest memory, while power and tooling fixes target wrong readings and resource leaks.
First, KVM on x86, in merge zero-three-seven-four-one-b-c. Four fixes stand out for host operators. One handles the shadow stack bit being set in nested page faults, seen now that Hyper-V guests use control-flow protection alongside guest memory features. Without it, hosts hit warnings. Another clears the virtual…
Second, power reporting accuracy, in merge d-seven-seven-b-d-zero-d and turbostat merge c-b-c-zero-eight-c-two. The power supply core now prevents unregistering a device while a callback is running, a classic removal race. Battery drivers fix temperature conversion, raw capacity values, and a swapped minimum versus…
Finally, two build correctness items. The Nios two checksum fold fix, in commit b-nine-six-three-f-two-three, casts to avoid type degradation caught by sparse. Bootconfig adds a message to its footer size check for compilers before C twenty-three.
What's next: test device removal paths and update KVM hosts running Hyper-V…
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