[Bug 1527460] Re: fwts PCIe ASPM tests are throwing Segmentation fault

[Chris J Arges]

** Also affects: fwts (Ubuntu Trusty)
   Importance: Undecided
       Status: New

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Title:
  fwts PCIe ASPM tests are throwing Segmentation fault

Status in fwts package in Ubuntu:
  In Progress
Status in fwts source package in Trusty:
  New

Bug description:
  Problem Description
  ===================
  while running fwts Test in Firestone system on ubuntu14.04.3(3.19.0-25-generic) Failed

  Steps to Reproduce
  ===================
  1- Install Firestone system with ubuntu14.04.3(3.19.0-25-generic)
  2-install fwts user space tool
  3- run test

  LOG:
  ===========
  root at system :~# fwts --batch --interactive --power-states
  Running 14 tests, results appended to results.log
  Test: Gather kernel system information.
    Gather kernel signature.                                1 info only
    Gather kernel system information.                       1 info only
    Gather kernel boot command line.                        1 info only
    Gather ACPI driver version.                             1 info only
  Test: Scan kernel log for Oopses.
    Kernel log oops check.                                  2 passed
  Test: Scan kernel log for errors and warnings.
    Kernel log error check.                                 1 passed
  Test: General ACPI information test.
    Determine Kernel ACPI version.                          1 info only
    Determine machine's ACPI version.
    Determine AML compiler.                                 1 info only
  Test: UEFI secure boot test.
   Test aborted..
  Test: Test firmware has set PCI Express MaxReadReq to a higher value on n..
    Test firmware settings MaxReadReq for PCI Express de..  1 passed
  Test: PCIe ASPM test.
  Segmentation faultest.                                                                                                                                               :  42.9% /
  root at system:~#


  
  [SRU Justification][Trusty]

  fwts segfaults because the ASPM test on this machine is returning no
  ACPI tables and the test is not checking for a NULL table and hence
  dereferencing it causing the segfault While debugging this I also
  noticed that if /dev/mem is not available then two /dev/mem mmaps may
  also cause a segfault, so I've added fixes for this too.

  [Fix]
  Upstream fix 9992dcca169282ab967177cc8bdac94eee66c93
  https://lists.ubuntu.com/archives/fwts-devel/2015-December/007215.html
  https://lists.ubuntu.com/archives/fwts-devel/2015-December/007217.html

  [Testcase]
  Run fwts on a system without ACPI tables. Will segfault. With the fix, it runs w/o a segfault

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