This option checks for a stack overrun on calls to schedule(). If the
stack end location is found to be over written always panic as the
content of the corrupted region can no longer be trusted. This is to
ensure no erroneous behaviour occurs which could result in data
corruption or a sporadic crash at a later stage once the region is
examined. The runtime overhead introduced is minimal.

Ref: https://cateee.net/lkddb/web-lkddb/SCHED_STACK_END_CHECK.html

Looks like this is debug related, not sure if we want this on KVM
kernels.

** Also affects: ubuntu-kernel-tests
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1812159

Title:
  SCHED_STACK_END_CHECK should be enabled in B-kvm

Status in ubuntu-kernel-tests:
  New
Status in linux-kvm package in Ubuntu:
  New

Bug description:
  The test_380_config_sched_stack_end_check test failed on the Bionic
  KVM kernel

        FAIL: test_380_config_sched_stack_end_check 
(__main__.KernelSecurityConfigTest)
        Ensure SCHED_STACK_END_CHECK is set
        ----------------------------------------------------------------------
        Traceback (most recent call last):
        File "./test-kernel-security.py", line 2628, in 
test_380_config_sched_stack_end_check
        self.assertKernelConfig('SCHED_STACK_END_CHECK', expected)
        File "./test-kernel-security.py", line 207, in assertKernelConfig
        self.assertKernelConfigSet(name)
        File "./test-kernel-security.py", line 194, in assertKernelConfigSet
        '%s option was expected to be set in the kernel config' % name)
        AssertionError: SCHED_STACK_END_CHECK option was expected to be set in 
the kernel config

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: linux-image-4.15.0-1028-kvm 4.15.0-1028.28
  ProcVersionSignature: User Name 4.15.0-1028.28-kvm 4.15.18
  Uname: Linux 4.15.0-1028-kvm x86_64
  ApportVersion: 2.20.9-0ubuntu7.5
  Architecture: amd64
  Date: Thu Jan 17 06:44:41 2019
  SourcePackage: linux-kvm
  UpgradeStatus: No upgrade log present (probably fresh install)

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