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[Po-Hsu Lin <2072460@xxxxxxxxxxxxxxxxxx>]

** Description changed:

  Issue found on Google N2D instances since sru-20240429 with Noble
  6.8.0-32.32
  
  KernelNonSecurityTest.test_10_bad_syscall_returns_ENOSYS failed with:
   Running 'python3 ./test-kernel-security.py -v KernelNonSecurityTest.test_10_bad_syscall_returns_ENOSYS'
   Running test: './test-kernel-security.py' distro: 'Ubuntu 24.04' kernel: '6.8.0-36.36.1 (Ubuntu 6.8.0-36.36.1-lowlatency 6.8.4)' arch: 'amd64' init: 'systemd' uid: 0/0 SUDO_USER: 'ubuntu')
   test_10_bad_syscall_returns_ENOSYS (__main__.KernelNonSecurityTest.test_10_bad_syscall_returns_ENOSYS)
   syscall(666666) returns ENOSYS (LP: #339743) ... FAIL
  
   ======================================================================
   FAIL: test_10_bad_syscall_returns_ENOSYS (__main__.KernelNonSecurityTest.test_10_bad_syscall_returns_ENOSYS)
   syscall(666666) returns ENOSYS (LP: #339743)
   ----------------------------------------------------------------------
   Traceback (most recent call last):
     File "/home/ubuntu/autotest/client/tmp/ubuntu_qrt_kernel_security/src/qa-regression-testing/scripts/./test-kernel-security.py", line 3036, in test_10_bad_syscall_returns_ENOSYS
       self.assertShellExitEquals(expected, self._unpriv_cmd(["./bad-syscall"]))
     File "/home/ubuntu/autotest/client/tmp/ubuntu_qrt_kernel_security/src/qa-regression-testing/scripts/testlib.py", line 1331, in assertShellExitEquals
       self.assertEqual(expected, rc, msg + result + report)
   AssertionError: 0 != -11 : Got exit code -11, expected 0
   Command: 'sudo', '-u', 'ubuntu', './bad-syscall'
   Output:
  
   ----------------------------------------------------------------------
   Ran 1 test in 0.187s
  
   FAILED (failures=1)
  
+ $ sudo -u ubuntu ./bad-syscall
+ Segmentation fault
+ $ echo $?
+ 139
+ 
  And this failure will trigger:
  2024-07-08T03:47:09.719619+00:00 n-l-gen-6-8-n2dstd2-u-qrt-krn-security kernel: traps: bad-syscall[5430] general protection fault ip:5e0f965b80aa sp:7ffdf3cf71d0 error:402 in bad-syscall[5e0f965b8000+1000]
  
  Which leads to the sut-scan failure as the "kernel: traps:" pattern was
  found.

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https://bugs.launchpad.net/bugs/2072460

Title:
  KernelNonSecurityTest.test_10_bad_syscall_returns_ENOSYS from
  ubuntu_qrt_kernel_security failed on Noble GCP N2D instances

Status in ubuntu-kernel-tests:
  New

Bug description:
  Issue found on Google N2D instances since sru-20240429 with Noble
  6.8.0-32.32

  KernelNonSecurityTest.test_10_bad_syscall_returns_ENOSYS failed with:
   Running 'python3 ./test-kernel-security.py -v KernelNonSecurityTest.test_10_bad_syscall_returns_ENOSYS'
   Running test: './test-kernel-security.py' distro: 'Ubuntu 24.04' kernel: '6.8.0-36.36.1 (Ubuntu 6.8.0-36.36.1-lowlatency 6.8.4)' arch: 'amd64' init: 'systemd' uid: 0/0 SUDO_USER: 'ubuntu')
   test_10_bad_syscall_returns_ENOSYS (__main__.KernelNonSecurityTest.test_10_bad_syscall_returns_ENOSYS)
   syscall(666666) returns ENOSYS (LP: #339743) ... FAIL

   ======================================================================
   FAIL: test_10_bad_syscall_returns_ENOSYS (__main__.KernelNonSecurityTest.test_10_bad_syscall_returns_ENOSYS)
   syscall(666666) returns ENOSYS (LP: #339743)
   ----------------------------------------------------------------------
   Traceback (most recent call last):
     File "/home/ubuntu/autotest/client/tmp/ubuntu_qrt_kernel_security/src/qa-regression-testing/scripts/./test-kernel-security.py", line 3036, in test_10_bad_syscall_returns_ENOSYS
       self.assertShellExitEquals(expected, self._unpriv_cmd(["./bad-syscall"]))
     File "/home/ubuntu/autotest/client/tmp/ubuntu_qrt_kernel_security/src/qa-regression-testing/scripts/testlib.py", line 1331, in assertShellExitEquals
       self.assertEqual(expected, rc, msg + result + report)
   AssertionError: 0 != -11 : Got exit code -11, expected 0
   Command: 'sudo', '-u', 'ubuntu', './bad-syscall'
   Output:

   ----------------------------------------------------------------------
   Ran 1 test in 0.187s

   FAILED (failures=1)

  $ sudo -u ubuntu ./bad-syscall
  Segmentation fault
  $ echo $?
  139

  And this failure will trigger:
  2024-07-08T03:47:09.719619+00:00 n-l-gen-6-8-n2dstd2-u-qrt-krn-security kernel: traps: bad-syscall[5430] general protection fault ip:5e0f965b80aa sp:7ffdf3cf71d0 error:402 in bad-syscall[5e0f965b8000+1000]

  Which leads to the sut-scan failure as the "kernel: traps:" pattern
  was found.

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