Intel cpu flaw - kernel memory leaking

Discussion in 'Intel x86 CPUs and chipsets' started by argent, Jan 3, 2018.

  1. argent

    argent Member

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  2. mesaoz

    mesaoz Member

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    "5 to 30 per cent slow down"

    Wow...
     
  3. self_slaughter

    self_slaughter Member

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    Had to laugh at this bit...

     
  4. RnR

    RnR Member

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    AMD cpu's not affected.
     
  5. hvalac

    hvalac Member

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    So which generations and or models are affected by this or is it just every intel cpu ever made?
     
  6. mesaoz

    mesaoz Member

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    Anything in the last 10 years apparently, but slow downs won't be as bad in the more recent chips.
     
  7. RnR

    RnR Member

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  8. GumbyNoTalent

    GumbyNoTalent Member

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  9. RnR

    RnR Member

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  10. cvidler

    cvidler Member

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    Anyone examined the kernel changes?
    Are they likely to be backportable for those on LTS/RHEL style distros (RHEL still being on 3.10)?
     
  11. VirtualNinja

    VirtualNinja Member

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    golf clap @ Intel. First the IME vulnerability now this. Court Jester will need to be put on suicide watch, his god is flawed.
     
    connico, Linkin, Bertross and 2 others like this.
  12. luke o

    luke o Member

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    Should be optional really, a tick box yes I understand my computer could be compromised but please let it run 30% faster in some workloads. Especially for those either not online permanently, not running virtualisation etc.

    Good games don't seem impacted.
     
  13. adamsleath

    adamsleath Member

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    yet
     
  14. cvidler

    cvidler Member

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    It's a kernel boot option on Linux, as for Windows... Well knowing MS these days, it'll be forced down your throat whether you like it or not.
     
  15. itsmydamnation

    itsmydamnation Member

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    AMD engineer has stated that they dont allow ring 3 based speculation to pull ring 0 data, permissions are checked first.

    It appears that Intel allows this type of speculation and then invalidates once it fails permission check, but this opens up a window where there is a cache line/tlb entry that shouldn't be there and that can then be exploited.

    Given that its still under NDA's we will just have to wait and see what the exact exploit is......
     
  16. RnR

    RnR Member

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    Fair point. Seems validation at Intel have slipped to make schedules. Commentary from various ex-Intel folk - https://news.ycombinator.com/item?id=16058920 - but could also be happening at AMD.
     
  17. adamsleath

    adamsleath Member

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    redesign the chip
     
  18. OJR

    OJR Member

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    Yup SSM passed, Intel fucks up monumentally (again). CJ will be tearing his hair out. We all knew this day would come though.
     
  19. Court Jester

    Court Jester Member

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    exactly i suspect we are not far off the bad news
     
  20. RnR

    RnR Member

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    Based on what?
     

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