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[Po-Hsu Lin <1949645@xxxxxxxxxxxxxxxxxx>]

** Tags added: jammy oracle sru-s20240205

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https://bugs.launchpad.net/bugs/1949645

Title:
  test_ulimit_stack_small from ubuntu_qrt_kernel_security fails on I/J/M
  arm64k

Status in QA Regression Testing:
  New
Status in ubuntu-kernel-tests:
  New

Bug description:
  Note: I decided to split this report into two, let's track the
  test_030_mmap_min failure in bug 1931393 - PHLin

  Test test_ulimit_stack_small from ubuntu_qrt_kernel_security is
  failing on Impish / Jammy ARM64k with:

    FAIL: test_ulimit_stack_small (__main__.KernelNonSecurityTest)
    Ensure small stack limits are enforced
    ----------------------------------------------------------------------
    Traceback (most recent call last):
      File "./test-kernel-security.py", line 3020, in test_ulimit_stack_small
        self.assertShellExitIn(expected, self._unpriv_cmd(["sh", "-c", "ulimit -s 1 && /bin/true"]))
      File "/home/ubuntu/autotest/client/tmp/ubuntu_qrt_kernel_security/src/qa-regression-testing/scripts/testlib.py", line 1218, in assertShellExitIn
        self.assertIn(rc, expected, msg + result + report)
    AssertionError: Got exit code 0, expected one of 139
    Command: 'sudo', '-u', 'ubuntu', 'sh', '-c', 'ulimit -s 1 && /bin/true'
    Output:

    ----------------------------------------------------------------------
    Ran 1 test in 0.016s

  This is not failing on ARM64, but failing with generic-64k flavour
  instead.

  [Original Bug Report]
  Finding two failures in test-kernel-security.py from ubuntu_qrt_kernel_security fails on impish (test_ulimit_stack_small / test_030_mmap_min). These are found on previous kernels from Impish, so not considered a regression.

  hosts: generic-64k dazzle and helo-kernel

  test_ulimit_stack_small (__main__.KernelNonSecurityTest)
  Ensure small stack limits are enforced ... FAIL

  .....

  test_030_mmap_min (__main__.KernelSecurityTest)
  10/22 01:49:47 ERROR|     utils:0153| [stderr] Low memory allocation respects mmap_min_addr ... (arm kernel with 64K pages configured (LP:#1931393) (65536) FAIL

  .....

  ======================================================================
  FAIL: test_ulimit_stack_small (__main__.KernelNonSecurityTest)
  Ensure small stack limits are enforced
  ----------------------------------------------------------------------
  Traceback (most recent call last):
    File "./test-kernel-security.py", line 3014, in test_ulimit_stack_small
      self.assertShellExitIn(expected, self._unpriv_cmd(["sh", "-c", "ulimit -s 1 && /bin/true"]))
    File "/home/ubuntu/autotest/client/tmp/ubuntu_qrt_kernel_security/src/qa-regression-testing/scripts/testlib.py", line 1218, in assertShellExitIn
      self.assertIn(rc, expected, msg + result + report)
  AssertionError: Got exit code 0, expected one of 139
  Command: 'sudo', '-u', 'ubuntu', 'sh', '-c', 'ulimit -s 1 && /bin/true'
  Output:

  ======================================================================
  FAIL: test_030_mmap_min (__main__.KernelSecurityTest)
  Low memory allocation respects mmap_min_addr
  ----------------------------------------------------------------------
  Traceback (most recent call last):
    File "./test-kernel-security.py", line 285, in test_030_mmap_min
      mmap_limit = self._test_sysctl_value('vm/mmap_min_addr', wanted, "is wine or qemu-kvm-extras-static installed?")
    File "/home/ubuntu/autotest/client/tmp/ubuntu_qrt_kernel_security/src/qa-regression-testing/scripts/testlib.py", line 1269, in _test_sysctl_value
      self.assertEqual(value, expected, report)
  AssertionError: /proc/sys/vm/mmap_min_addr is not 65536: 32768 (is wine or qemu-kvm-extras-static installed?)

  ----------------------------------------------------------------------
  Ran 125 tests in 26.120s

  FAILED (failures=2)

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