test_096_proc_entries_unreadable in kernel security test failed with 4.4 X-kvm

[Po-Hsu Lin]

The test failed with:
  ERROR: test_096_proc_entries_unreadable (__main__.KernelSecurityTest)
  sensitive files in /proc are not world readable
  ----------------------------------------------------------------------
  Traceback (most recent call last):
    File "./test-kernel-security.py", line 1584, in test_096_proc_entries_unreadable
      self.assertEqual(os.stat(name).st_mode & mask, expected, '%s is world readable' % (name))
  OSError: [Errno 2] No such file or directory: '/proc/slabinfo'

Steps to reproduce:
  Deploy the node with Xenial 4.4 kernel, install linux-kvm
  sudo apt-get install python-minimal
  git clone --depth=1 git://kernel.ubuntu.com/ubuntu/autotest-client-tests -b master-next
  git clone --depth=1 git://kernel.ubuntu.com/ubuntu/autotest
  rm -fr autotest/client/tests
  ln -sf ~/autotest-client-tests autotest/client/tests
  AUTOTEST_PATH=/home/ubuntu/autotest sudo -E autotest/client/autotest-local --verbose autotest/client/tests/ubuntu_qrt_kernel_security/control

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-1019-kvm 4.4.0-1019.24
ProcVersionSignature: User Name 4.4.0-1019.24-kvm 4.4.98
Uname: Linux 4.4.0-1019-kvm x86_64
NonfreeKernelModules: signpost
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
Date: Mon Apr 2 16:53:43 2018
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: linux-kvm
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1760642

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Steve Beattie (sbeattie)]

This was an error in the qrt test, that didn't ensure that /proc/slabinfo existed before checking its permissions (due to a different configuration of the kernel). I've fixed the script to not fail in this case in qrt commit https://git.launchpad.net/qa-regression-testing/commit/?id=b144f33031e759fec72dee2319f1daa44669b678.

Thanks.