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efi/preinstall: Permit pre-OS application launches from SPI flash in PCR4#530

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chrisccoulson merged 1 commit intocanonical:masterfrom
chrisccoulson:preinstall-fix-pcr4-tests-on-hp
Mar 27, 2026
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efi/preinstall: Permit pre-OS application launches from SPI flash in PCR4#530
chrisccoulson merged 1 commit intocanonical:masterfrom
chrisccoulson:preinstall-fix-pcr4-tests-on-hp

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@chrisccoulson
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We currently consider any pre-OS EV_EFI_BOOT_SERVICES_APPLICATION event
that isn't Absolute to be a sysprep app. However, ignore any events
loaded from flash. This should fix compatibility with some HP systems
which measure multiple EV_EFI_BOOT_SERVICES_APPLICATION events
associated with various firmware components during normal boots.

Fixes: FR-12927
Fixes: #509

…PCR4

We currently consider any pre-OS EV_EFI_BOOT_SERVICES_APPLICATION event
that isn't Absolute to be a sysprep app. However, ignore any events
loaded from flash. This should fix compatibility with some HP systems
which measure multiple EV_EFI_BOOT_SERVICES_APPLICATION events
associated with various firmware components during normal boots.

Fixes: FR-12927
Fixes: canonical#509
@chrisccoulson chrisccoulson requested a review from pedronis March 26, 2026 14:36
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thank you

@chrisccoulson chrisccoulson merged commit 8fe54af into canonical:master Mar 27, 2026
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PCR_UNUSABLE on hardware (intel xeon + nvidia)

2 participants