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[Jian Hui Lee <2025638@xxxxxxxxxxxxxxxxxx>]

i've seen the same failure on mediatek arm64 board if lxd snap is
installed. if cgroup has been remounted without nsdelegate option, the
test case will fail due to open cgroup.proc without permission.

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https://bugs.launchpad.net/bugs/2025638

Title:
  cgroup_core02 in ubuntu_ltp_controller failed on J-5.15 s390x

Status in ubuntu-kernel-tests:
  New

Bug description:
  This is a new test case added with recent LTP update [1]

  Test failed with Jammy 5.15.0-77.84 in sru-20230612 on s390x instances:
  INFO: Test start time: Thu Jun 29 05:19:55 AM UTC 2023
  COMMAND:    /opt/ltp/bin/ltp-pan -q  -e -S   -a 44140     -n 44140  -f /tmp/ltp-ftOnhDzsv1/alltests -l /dev/null  -C /dev/null -T /dev/null
  LOG File: /dev/null
  FAILED COMMAND File: /dev/null
  TCONF COMMAND File: /dev/null
  Running tests.......
  tst_test.c:1558: TINFO: Timeout per run is 0h 00m 30s
  cgroup_core02.c:82: TFAIL: test_lesser_ns_open failed

  HINT: You _MAY_ be missing kernel fixes:

  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e57457641613

  HINT: You _MAY_ be vulnerable to CVE(s):

  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4197

  Summary:
  passed   0
  failed   1
  broken   0
  skipped  0
  warnings 0
  INFO: ltp-pan reported some tests FAIL
  LTP Version: 20230516
  INFO: Test end time: Thu Jun 29 05:19:55 AM UTC 2023

  [1] https://lists.ubuntu.com/archives/kernel-
  team/2023-June/140734.html

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