Public bug reported: [IMPACT]
When iommu is enabled crashdump fails to be collected because crash-kernel crashes with following trace [1]. Commits that address it : 1ddb32da4a62 iommu/vt-d: Simplify check in identity_mapping() 96d170f3b1a6 iommu/vt-d: Remove deferred_attach_domain() a11bfde9c77d iommu/vt-d: Do deferred attachment in iommu_need_mapping() 034d98cc0cdc iommu/vt-d: Move deferred device attachment into helper function 1d4615978f52 iommu/vt-d: Add attach_deferred() helper 1ee0186b9a12 iommu/vt-d: Refactor find_domain() helper [TEST CASE] Install a 5.4 kernel, add intel_iommu=on and iommu=pt to grub cmdline and trigger a crash. The crash kernel that boots will crash with trace [1]. [REGRESSION POTENTIAL] [OTHER] Kernel affected 5.4. [1] https://pastebin.ubuntu.com/p/FNxTxjg3DV/ ** Affects: linux (Ubuntu) Importance: Undecided Status: Incomplete ** Affects: linux (Ubuntu Focal) Importance: Medium Assignee: Ioanna Alifieraki (joalif) Status: Confirmed ** Also affects: linux (Ubuntu Focal) Importance: Undecided Status: New ** Changed in: linux (Ubuntu Focal) Status: New => Confirmed ** Changed in: linux (Ubuntu Focal) Importance: Undecided => Medium ** Changed in: linux (Ubuntu Focal) Assignee: (unassigned) => Ioanna Alifieraki (joalif) ** Description changed: + [IMPACT] + When iommu is enabled crashdump fails to be collected because crash-kernel crashes - with following trace [1]. + with following trace [1]. Commits that address it : 1ddb32da4a62 iommu/vt-d: Simplify check in identity_mapping() 96d170f3b1a6 iommu/vt-d: Remove deferred_attach_domain() - a11bfde9c77d iommu/vt-d: Do deferred attachment in iommu_need_mapping() + a11bfde9c77d iommu/vt-d: Do deferred attachment in iommu_need_mapping() 034d98cc0cdc iommu/vt-d: Move deferred device attachment into helper function 1d4615978f52 iommu/vt-d: Add attach_deferred() helper 1ee0186b9a12 iommu/vt-d: Refactor find_domain() helper + [TEST CASE] + + Install a 5.4 kernel, add intel_iommu=on and iommu=pt to grub cmdline + and trigger a crash. + The crash kernel that boots will crash with trace [1]. + + [REGRESSION POTENTIAL] + + [OTHER] + Kernel affected 5.4. [1] https://pastebin.ubuntu.com/p/FNxTxjg3DV/ -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1922738 Title: 5.4 kernel: when iommu is on crashdump fails Status in linux package in Ubuntu: Incomplete Status in linux source package in Focal: Confirmed Bug description: [IMPACT] When iommu is enabled crashdump fails to be collected because crash-kernel crashes with following trace [1]. Commits that address it : 1ddb32da4a62 iommu/vt-d: Simplify check in identity_mapping() 96d170f3b1a6 iommu/vt-d: Remove deferred_attach_domain() a11bfde9c77d iommu/vt-d: Do deferred attachment in iommu_need_mapping() 034d98cc0cdc iommu/vt-d: Move deferred device attachment into helper function 1d4615978f52 iommu/vt-d: Add attach_deferred() helper 1ee0186b9a12 iommu/vt-d: Refactor find_domain() helper [TEST CASE] Install a 5.4 kernel, add intel_iommu=on and iommu=pt to grub cmdline and trigger a crash. The crash kernel that boots will crash with trace [1]. [REGRESSION POTENTIAL] [OTHER] Kernel affected 5.4. [1] https://pastebin.ubuntu.com/p/FNxTxjg3DV/ To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1922738/+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
