Re: Huge Intel CPU Bug Allegedly Causes Kernel Memory Vulnerability With Up To 30% Performance Hit

From	Waylon Robertson <wrobertson1981@gmail.com>
Newsgroups	linux.debian.security
Subject	Re: Huge Intel CPU Bug Allegedly Causes Kernel Memory Vulnerability With Up To 30% Performance Hit
Date	2018-01-04 00:40 +0100
Message-ID	<v40Nz-5GZ-5@gated-at.bofh.it> (permalink)
References	<v3OW5-63u-5@gated-at.bofh.it> <v3TCq-IV-15@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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oh crud. there goes playing games on this laptop. 30% loss where it
can only just play some games... oh fun. <div
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On Thu, Jan 4, 2018 at 4:20 AM, Pavel Alyev <aliech@aliech.ru> wrote:
>
> It's main reason why coreboot developers recommend to include LATEST
> microcode patch in build of BIOS image.
>
> And if this can't be fixed... Nothing happened. There is many bugs in CPUs.
> And kernel have workarounds for this. Look on non x86 sources. Look on huge
> errata's lists of ARM, for example. It's normal practice.
>
>
> 03.01.2018 13:43, Vincent Deffontaines пишет:
>
>> Greetings,
>>
>> And happy new year.
>>
>> This is hitting all of us soon.
>> In short : a huge (and long lasting) hardware bug, present in about all
>> Intel CPUs that have been sold for the last 10 years.
>> It is not fixable by microcode, and requires ugly patching from the kernel
>> layer. Other OSes such as Microsoft are concerned as well.
>>
>> Nice overview of the thing :
>>
>> https://hothardware.com/news/intel-cpu-bug-kernel-memory-isolation-linux-windows-macos
>>
>> More detail :
>>
>> http://pythonsweetness.tumblr.com/post/169166980422/the-mysterious-case-of-the-linux-page-table
>>
>> Linus' patch :
>>
>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5aa90a84589282b87666f92b6c3c917c8080a9bf
>>
>>
>> Vincent Deffontaines
>>
>
> --
> With best regards
>

Thread

Huge Intel CPU Bug Allegedly Causes Kernel Memory Vulnerability With  Up To 30% Performance Hit Vincent Deffontaines <vincent@gryzor.com> - 2018-01-03 12:00 +0100
  Re: Huge Intel CPU Bug Allegedly Causes Kernel Memory Vulnerability  With  Up To 30% Performance Hit Henrique de Moraes Holschuh <hmh@debian.org> - 2018-01-03 15:10 +0100
  Re: Huge Intel CPU Bug Allegedly Causes Kernel Memory Vulnerability  With Up To 30% Performance Hit Pavel Alyev <aliech@aliech.ru> - 2018-01-03 17:00 +0100
    Re: Huge Intel CPU Bug Allegedly Causes Kernel Memory Vulnerability  With Up To 30% Performance Hit Waylon Robertson <wrobertson1981@gmail.com> - 2018-01-04 00:40 +0100
    Re: Huge Intel CPU Bug Allegedly Causes Kernel Memory Vulnerability With Up To 30% Performance Hit Rushan <debsec@irush.su> - 2018-01-04 12:40 +0100

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