Public bug reported:
[Impact]
To include the missing upstream patches to the 4.15 and 5.4 kernel.
* x86/entry/64: Do not use RDPID in paranoid entry to accommodate KVM:
- occasional random failure when running KVM
* x86/fsgsbase/64: Fix NULL deref in 86_fsgsbase_read_task
- Google folks found this when running their fuzzy test cases. Don't know how
realistic this can hit.
* x86/fsgsbase: Fix Xen PV support
* x86/process/64: Make save_fsgs_for_kvm() ready for FSGSBASE
- these two are for VMMs.
Some of these are already included in our azure kernels. 5.8 doesn't
need them because we already synced with upstream while preparing it.
[Test Case]
Since we are syncing with mainline a boot test and a regression test in
ACC instances should be enough to confirm the changes are working.
Since these instances are not publicly available yet, Msft is helping us
to test this changes.
[Where problems could occur]
This affects the SGX driver that is only available on ACC instances
(which is not widely used yet).
** Affects: linux-azure (Ubuntu)
Importance: Medium
Assignee: Marcelo Cerri (mhcerri)
Status: In Progress
** Affects: linux-azure-4.15 (Ubuntu)
Importance: Medium
Assignee: Marcelo Cerri (mhcerri)
Status: In Progress
** Affects: linux-azure (Ubuntu Bionic)
Importance: Undecided
Assignee: Marcelo Cerri (mhcerri)
Status: Invalid
** Affects: linux-azure-4.15 (Ubuntu Bionic)
Importance: Medium
Assignee: Marcelo Cerri (mhcerri)
Status: In Progress
** Affects: linux-azure (Ubuntu Focal)
Importance: Medium
Assignee: Marcelo Cerri (mhcerri)
Status: In Progress
** Affects: linux-azure-4.15 (Ubuntu Focal)
Importance: Undecided
Assignee: Marcelo Cerri (mhcerri)
Status: Invalid
** Affects: linux-azure (Ubuntu Groovy)
Importance: Undecided
Assignee: Marcelo Cerri (mhcerri)
Status: Invalid
** Affects: linux-azure-4.15 (Ubuntu Groovy)
Importance: Undecided
Assignee: Marcelo Cerri (mhcerri)
Status: Invalid
** Also affects: linux-azure-4.15 (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux-azure (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux-azure-4.15 (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux-azure (Ubuntu Groovy)
Importance: Undecided
Status: New
** Also affects: linux-azure-4.15 (Ubuntu Groovy)
Importance: Undecided
Status: New
** Also affects: linux-azure (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: linux-azure-4.15 (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: linux-azure (Ubuntu Groovy)
Status: New => Invalid
** Changed in: linux-azure-4.15 (Ubuntu Groovy)
Status: New => Invalid
** Changed in: linux-azure-4.15 (Ubuntu Focal)
Status: New => Invalid
** Changed in: linux-azure-4.15 (Ubuntu Bionic)
Status: New => In Progress
** Changed in: linux-azure-4.15 (Ubuntu Bionic)
Importance: Undecided => Medium
** Changed in: linux-azure (Ubuntu)
Importance: Undecided => Medium
** Changed in: linux-azure-4.15 (Ubuntu)
Importance: Undecided => Medium
** Changed in: linux-azure (Ubuntu Bionic)
Status: New => Invalid
** Changed in: linux-azure (Ubuntu Focal)
Status: New => In Progress
** Changed in: linux-azure-4.15 (Ubuntu)
Status: New => In Progress
** Changed in: linux-azure (Ubuntu Focal)
Assignee: (unassigned) => Marcelo Cerri (mhcerri)
** Changed in: linux-azure-4.15 (Ubuntu Bionic)
Assignee: (unassigned) => Marcelo Cerri (mhcerri)
** Changed in: linux-azure-4.15 (Ubuntu)
Assignee: (unassigned) => Marcelo Cerri (mhcerri)
** Changed in: linux-azure (Ubuntu Bionic)
Assignee: (unassigned) => Marcelo Cerri (mhcerri)
** Changed in: linux-azure (Ubuntu Groovy)
Assignee: (unassigned) => Marcelo Cerri (mhcerri)
** Changed in: linux-azure-4.15 (Ubuntu Focal)
Assignee: (unassigned) => Marcelo Cerri (mhcerri)
** Changed in: linux-azure-4.15 (Ubuntu Groovy)
Assignee: (unassigned) => Marcelo Cerri (mhcerri)
** Changed in: linux-azure (Ubuntu Focal)
Importance: Undecided => Medium
** Description changed:
[Impact]
To include the missing upstream patches to the 4.15 and 5.4 kernel.
* x86/entry/64: Do not use RDPID in paranoid entry to accommodate KVM:
- occasional random failure when running KVM
* x86/fsgsbase/64: Fix NULL deref in 86_fsgsbase_read_task
- Google folks found this when running their fuzzy test cases. Don't know how
realistic this can hit.
* x86/fsgsbase: Fix Xen PV support
* x86/process/64: Make save_fsgs_for_kvm() ready for FSGSBASE
- these two are for VMMs.
- (Some of those are already included in our azure kernels)
+ Some of these are already included in our azure kernels. 5.8 doesn't
+ need them because we already synced with upstream while preparing it.
[Test Case]
Since we are syncing with mainline a boot test and a regression test in
ACC instances should be enough to confirm the changes are working.
Since these instances are not publicly available yet, Msft is helping us
to test this changes.
[Where problems could occur]
This affects the SGX driver that is only available on ACC instances
(which is not widely used yet).
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https://bugs.launchpad.net/bugs/1913294
Title:
Sync FSGSBASE patches in azure kernel with mainline
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