** Changed in: linux-oem-6.1 (Ubuntu Jammy)
Status: New => Fix Committed
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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-oem-6.1 package in Ubuntu:
Invalid
Status in linux source package in Trusty:
Incomplete
Status in linux-oem-6.1 source package in Trusty:
Invalid
Status in linux source package in Xenial:
Incomplete
Status in linux-oem-6.1 source package in Xenial:
Invalid
Status in linux source package in Bionic:
Incomplete
Status in linux-oem-6.1 source package in Bionic:
Invalid
Status in linux source package in Focal:
Fix Committed
Status in linux-oem-6.1 source package in Focal:
Invalid
Status in linux source package in Jammy:
Fix Committed
Status in linux-oem-6.1 source package in Jammy:
Fix Committed
Status in linux source package in Kinetic:
Fix Committed
Status in linux-oem-6.1 source package in Kinetic:
Invalid
Status in linux source package in Lunar:
Fix Committed
Status in linux-oem-6.1 source package in Lunar:
Invalid
Status in linux source package in Mantic:
Fix Released
Status in linux-oem-6.1 source package in Mantic:
Invalid
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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