This bug is awaiting verification that the linux-
riscv-5.15/5.15.0-1034.38~20.04.1 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-focal' to
'verification-done-focal'. If the problem still exists, change the tag
'verification-needed-focal' to 'verification-failed-focal'.

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-focal-linux-riscv-5.15 verification-needed-focal

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https://bugs.launchpad.net/bugs/2013603

Title:
  Kernel livepatch ftrace graph fix

Status in Ubuntu on IBM z Systems:
  Fix Released
Status in linux package in Ubuntu:
  Invalid
Status in linux source package in Jammy:
  Fix Released

Bug description:
  [Impact]
  * Additional patch required to support Livepatch for s390x
  * Fixes Livepatch transition issues when using ftrace graph tracing

  [Test Case]
  * Compile test
  * Boot test
  * Test a Livepatch (patch to /proc/meminfo module)
  * Test Livepatch from ftrace graphed function (via 
https://github.com/SUSE/qa_test_klp/, klp_tc_10.sh)

  [Where things could go wrong]
  * Functionality already exists upstream, once kernel is boot and Livepatch 
tested - should have no regressions

  [Other info]
  * Additional required patch was identified 
(https://github.com/dynup/kpatch/commit/324a43714b1227b5688e22966a5ee4414c8861d1)
 due to ftrace graph livepatch transition issue 
(https://github.com/SUSE/qa_test_klp/issues/17).

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