The page owner feature doesn't work with UEFI secure boot enabled.

Solution Verified - Updated -

Issue

  • Trying to read the page_owner debugfs file fails with error:
# cat /sys/kernel/debug/page_owner
cat: /sys/kernel/debug/page_owner: Operation not permitted

Environment

  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • UEFI Secure Boot Enabled

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