Hi Chris, There are few observations we made while testing.
1. On baseline Ubuntu, we see a PCR7 mismatch. Could you please confirm if this is a known issue and what is the reason for this mismatch? 2. We were able to validate that there were duplicate entries in the TCG logs with the test kernel and extending those entries in the PCR matched the TCG log PCR values. But the same is not true for the baseline Ubuntu, we did not see duplicate values in the baseline Ubuntu measurements. Does the test kernel try to fix the PCR7 mismatch too and also introduces a regression because of duplicate entries? 3. We also noticed that there are no bios measurements exposed by the kernel when secure boot is turned off. Is it possible to get bios measurements in that scenario, indicating that secure boot is turned off? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-azure in Ubuntu. https://bugs.launchpad.net/bugs/1838796 Title: TPM event log does not contain events measured after ExitBootServices Status in linux package in Ubuntu: Won't Fix Status in linux-azure package in Ubuntu: In Progress Status in linux source package in Xenial: Won't Fix Status in linux-azure source package in Xenial: In Progress Status in linux source package in Disco: Won't Fix Status in linux-azure source package in Disco: In Progress Bug description: The TPM event log (/sys/kernel/security/tpm0/binary_bios_measurements) does not contain any events that are measured by UEFI after the kernel's EFI Boot stub calls ExitBootServices(). This means that PCR values calculated from the event log will not match the actual PCR values on the machine for PCR indices into which these events are measured. There are upstream patches to fix this in the mainline kernel tree: https://lore.kernel.org/lkml/20190520205501.177637-1-matthewgarr...@google.com/ --- ProblemType: Bug ApportVersion: 2.20.9-0ubuntu7.5 Architecture: amd64 AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found. CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 18.04 InstallationDate: Installed on 2019-06-20 (43 days ago) InstallationMedia: Ubuntu-Server 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210) IwConfig: eth0 no wireless extensions. lo no wireless extensions. Lspci: Lsusb: Error: command ['lsusb'] failed with exit code 1: MachineType: Microsoft Corporation Virtual Machine Package: linux (not installed) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 hyperv_fb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-22-generic root=UUID=fcb8dc9d-4dd3-490f-9f1c-fa6364770bb0 ro ProcVersionSignature: Ubuntu 4.18.0-22.23~18.04.1-generic 4.18.20 RelatedPackageVersions: linux-restricted-modules-4.18.0-22-generic N/A linux-backports-modules-4.18.0-22-generic N/A linux-firmware 1.173.3 RfKill: Tags: bionic Uname: Linux 4.18.0-22-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 01/30/2019 dmi.bios.vendor: Microsoft Corporation dmi.bios.version: Hyper-V UEFI Release v4.0 dmi.board.asset.tag: None dmi.board.name: Virtual Machine dmi.board.vendor: Microsoft Corporation dmi.board.version: Hyper-V UEFI Release v4.0 dmi.chassis.asset.tag: 8486-4870-7514-9524-5524-7794-69 dmi.chassis.type: 3 dmi.chassis.vendor: Microsoft Corporation dmi.chassis.version: Hyper-V UEFI Release v4.0 dmi.modalias: dmi:bvnMicrosoftCorporation:bvrHyper-VUEFIReleasev4.0:bd01/30/2019:svnMicrosoftCorporation:pnVirtualMachine:pvrHyper-VUEFIReleasev4.0:rvnMicrosoftCorporation:rnVirtualMachine:rvrHyper-VUEFIReleasev4.0:cvnMicrosoftCorporation:ct3:cvrHyper-VUEFIReleasev4.0: dmi.product.family: Virtual Machine dmi.product.name: Virtual Machine dmi.product.sku: None dmi.product.version: Hyper-V UEFI Release v4.0 dmi.sys.vendor: Microsoft Corporation To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1838796/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
