test_unconfined_userns from ubuntu_qrt_apparmor ApparmorTest failed with N-oem-6.10

[Po-Hsu Lin]

Issue found with N-oem-6.10.0-1004.4

ubuntu@ivysaur:~/autotest/client/tmp/ubuntu_qrt_apparmor/src/qa-regression-testing/scripts$ sudo python3 ./test-apparmor.py -v ApparmorTest.test_unconfined_userns
Running test: './test-apparmor.py' distro: 'Ubuntu 24.04' kernel: '6.10.0-1005.5 (Ubuntu 6.10.0-1005.5-oem 6.10.0-rc4)' arch: 'amd64' init: 'systemd' uid: 0/0 SUDO_USER: 'ubuntu')
Skipping private tests
test_unconfined_userns (__main__.ApparmorTest.test_unconfined_userns)
Test that unconfined userns restrictions are applied ... (enabling userns restrictions) FAIL

======================================================================
FAIL: test_unconfined_userns (__main__.ApparmorTest.test_unconfined_userns)
Test that unconfined userns restrictions are applied
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Traceback (most recent call last):
  File "/home/ubuntu/autotest/client/tmp/ubuntu_qrt_apparmor/src/qa-regression-testing/scripts/./test-apparmor.py", line 1492, in test_unconfined_userns
    self.assertEqual(expected, rc, result + report)
AssertionError: 0 != 1 : Got exit code 1, expected 0
sysctl: cannot stat /proc/sys/kernel/apparmor_restrict_unprivileged_userns: No such file or directory

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Ran 1 test in 0.114s

FAILED (failures=1)

[Georgia Garcia (georgiag)]

As in Bug 2071305, the apparmor kernel patches were not yet applied on -rc4, so this test will fail on this version. They are only present in -rc7 or Ubuntu-unstable-6.10.0-14.14