group.of.nepali.translators team mailing list archive

[Thadeu Lima de Souza Cascardo <2023220@xxxxxxxxxxxxxxxxxx>]

** Changed in: linux (Ubuntu Mantic)
       Status: Incomplete => Fix Released

** Changed in: linux (Ubuntu Lunar)
       Status: Incomplete => In Progress

** Changed in: linux (Ubuntu Kinetic)
       Status: Incomplete => In Progress

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https://bugs.launchpad.net/bugs/2023220

Title:
  Some INVLPG implementations can leave Global translations unflushed
  when PCIDs are enabled

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Trusty:
  Incomplete
Status in linux source package in Xenial:
  Incomplete
Status in linux source package in Bionic:
  Incomplete
Status in linux source package in Focal:
  Incomplete
Status in linux source package in Jammy:
  Incomplete
Status in linux source package in Kinetic:
  In Progress
Status in linux source package in Lunar:
  In Progress
Status in linux source package in Mantic:
  Fix Released

Bug description:
  [Impact]
  When PCIDs are enabled on Alder Lake and Raptor Lake, INVLPG will not flush the global TLB entries. This can lead to info leak or undefined behavior.

  [Mitigation]
  Boot with nopcid on affected systems.

  [Test case]
  There is no particular test case.

  [Potential regressions]
  This affects performance on the affected systems. TLB behavior could also be affected.

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