This bug is awaiting verification that the linux-azure- fips/5.15.0-1058.66+fips1 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-jammy-linux-azure-fips' to 'verification-done-jammy-linux-azure-fips'. If the problem still exists, change the tag 'verification-needed-jammy-linux-azure-fips' to 'verification-failed-jammy-linux-azure-fips'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: kernel-spammed-jammy-linux-azure-fips-v2 verification-needed-jammy-linux-azure-fips -- 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/2042568 Title: Azure - Kernel crashes when removing gpu from pci Status in linux-azure package in Ubuntu: Invalid Status in linux-azure source package in Jammy: Fix Released Status in linux-azure source package in Lunar: Fix Committed Bug description: [Description] On a VM on Azure with a Tesla gpu it was noticed that when removing the gpu from the pci the vm would crash. In case the nvidia drivers are loaded, the machine won't crash. Instead the removing process will hang and the machine will crash on reboot. This is related to bug [1]. The bug reported in [1] regards another driver but the root cause is the same. It is still investigated whether this is a bug in pci, or it is a bug of various drivers on how they use pci. For this case we have identified that removing commit [2] prevents the kernel crashes. Azure has requested to revert this commit, at least for the time being. This commit is not in upstream, so it just need to be reverted from Ubuntu kernels. [Test Case] On an Azure vm with a gpu : # echo '1' > /sys/bus/pci/devices/0001:00:00.0/remove where '0001:00:00.0' the pci address of the gpu. The vm will crash. [Where things could go wrong] The commit to be reverted was included in a patchset to address lp bugs https://bugs.launchpad.net/bugs/2023071 and https://bugs.launchpad.net/bugs/2023594 However this commit just reduces boot time and removing shall not introduce any regressions. Side effects will be increase in the boot time. [Other] Only Ubuntu azure kernels are affected : - Jammy 5.15 - Lunar 6.2 Focal is also affected since it's using 5.15 kernel. This commit does not appear in Mantic 6.5 kernel. [1] https://bugzilla.kernel.org/show_bug.cgi?id=215515 [2] https://git.launchpad.net/~canonical-kernel/ubuntu/+source/linux-azure/+git/jammy/commit/?h=Ubuntu-azure-5.15.0-1043.50&id=75af0c10b3703400890d314d1d91d25294234a81 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-azure/+bug/2042568/+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
