【CPU】Intel Skylake/Kaby Lakeに深刻な欠陥 Hyper-Threadingでシステムが予測不能な動作､データ損失などの可能性すべてのOSに影響

trick ★

[WARNING] Intel Skylake/Kaby Lake processors: broken hyper-threading
https://lists.debian.org/debian-devel/2017/06/msg00308.html

SO, WHAT IS THIS ALL ABOUT?
の項目より

IntelのSkylake(第6世代)とKabylake(第7世代)とCPUでハイパースレッディング(hyper-threading)を行うと
システムが予測不能な挙動を示し、アプリやシステムにデータの破損や損失を含むエラーが起こる可能性があります。

Debian projectで注目を集めたこの欠陥はDebianの安定動作に直接影響することが知られています。

これは、全てのOSに影響を及ぼす可能性があります（DebianなどLinuxベースのシステムに限らない）。
回避策としては、マイクロコードが修正されるまでハイパースレッディングをBIOSからOFFにすることで回避できます。

潜在的に影響を受けるソフトウェアの検出は困難です。全ての上記CPUユーザーはハイパースレッディングのOFFが強く推奨されます。

原文

This warning advisory is relevant for users of systems with the Intel
processors code-named "Skylake" and "Kaby Lake". These are: the 6th and
7th generation Intel Core processors (desktop, embedded, mobile and
HEDT), their related server processors (such as Xeon v5 and Xeon v6), as
well as select Intel Pentium processor models.

TL;DR: unfixed Skylake and Kaby Lake processors could, in some
situations, dangerously misbehave when hyper-threading is enabled.
Disable hyper-threading immediately in BIOS/UEFI to work around the
problem. Read this advisory for instructions about an Intel-provided
fix.

SO, WHAT IS THIS ALL ABOUT?
---------------------------

This advisory is about a processor/microcode defect recently identified
on Intel Skylake and Intel Kaby Lake processors with hyper-threading
enabled. This defect can, when triggered, cause unpredictable system
behavior: it could cause spurious errors, such as application and system
misbehavior, data corruption, and data loss.

It was brought to the attention of the Debian project that this defect
is known to directly affect some Debian stable users (refer to the end
of this advisory for details), thus this advisory.

Please note that the defect can potentially affect any operating system
(it is not restricted to Debian, and it is not restricted to Linux-based
systems). It can be either avoided (by disabling hyper-threading), or
fixed (by updating the processor microcode).

Due to the difficult detection of potentially affected software, and the
unpredictable nature of the defect, all users of the affected Intel
processors are strongly urged to take action as recommended by this
advisory.
（一部抜粋、翻訳しました。続きはソースで）

【CPU】Intel Skylake/Kaby Lakeに深刻な欠陥 Hyper-Threadingでシステムが予測不能な動作､データ損失などの可能性 すべてのOSに影響

【CPU】Intel Skylake/Kaby Lakeに深刻な欠陥 Hyper-Threadingでシステムが予測不能な動作､データ損失などの可能性すべてのOSに影響