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[AceLan Kao <1884159@xxxxxxxxxxxxxxxxxx>]

** Also affects: linux-oem-osp1 (Ubuntu)
   Importance: Undecided
       Status: New

** No longer affects: linux-oem-osp1 (Ubuntu Xenial)

** No longer affects: linux-oem-osp1 (Ubuntu Eoan)

** No longer affects: linux-oem-osp1 (Ubuntu Focal)

** Changed in: linux-oem-osp1 (Ubuntu)
       Status: New => Invalid

** Changed in: linux-oem-osp1 (Ubuntu Bionic)
       Status: New => Fix Committed

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https://bugs.launchpad.net/bugs/1884159

Title:
  Update lockdown patches

Status in linux package in Ubuntu:
  Fix Committed
Status in linux-oem-osp1 package in Ubuntu:
  Invalid
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Bionic:
  Fix Committed
Status in linux-oem-osp1 source package in Bionic:
  Fix Committed
Status in linux source package in Eoan:
  Fix Committed
Status in linux source package in Focal:
  Fix Committed

Bug description:
  Impact: The lockdown patches have evolved over time, and part of this
  was restricting more areas of the kernel. Not all of these additions
  were backported, and some can lead to lockdown bypasses, see [1] and
  [2].

  Fix: Backport newer lockdown restrictions to older releases.

  Test Case: Test cases for most of the backports can be found at [3],
  and [4] is another test case. Some which need e.g. specific hardware
  to test have not been tested.

  Regression Potential: Most of these are small, simple fixes with low
  potential for regression. Users may also lose access to some
  functionality previously accissible under secure boot. Some changes
  are more substantial, especially the hw_param and debugfs changes for
  xenial, but they are based on well-tested upstream code. The xmon
  backports also carry a more moderate risk of regression.

  [1] https://lists.ubuntu.com/archives/kernel-team/2020-June/111050.html
  [2] https://lore.kernel.org/lkml/20200615104332.901519-1-Jason@xxxxxxxxx/
  [3] https://git.launchpad.net/~sforshee/+git/lockdown-tests
  [4] https://git.zx2c4.com/american-unsigned-language/tree/american-unsigned-language.sh

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