test_062_guard_page_split in ubuntu_qrt_kernel_security failed with T-i386

[Po-Hsu Lin]

This issue was only spotted on T-i386, works fine with AMD64 / ARM64 / P8

FAIL: test_062_guard_page_split (__main__.KernelSecurityTest)
Make sure the stack guard page does not split the stack on mlock
----------------------------------------------------------------------
Traceback (most recent call last):
File "./test-kernel-security.py", line 587, in test_062_guard_page_split
self.assertShellExitEquals(expected, self._unpriv_cmd(["./split-stack"]))
File "/home/ubuntu/autotest/client/tmp/ubuntu_qrt_kernel_security/src/qa-regression-testing/scripts/testlib.py", line 1140, in assertShellExitEquals
self.assertEqual(expected, rc, msg + result + report)
AssertionError: Got exit code 3, expected 0
Command: 'sudo', '-u', 'ubuntu', './split-stack'
Output:
Could not find '[stack]' in /proc/self/maps!

[Po-Hsu Lin (cypressyew)]

Can't see this when verifying this manually, re-triggered on the jenkins.

[Po-Hsu Lin (cypressyew)]

It's failing with another issue:
FAIL: test_ulimit_stack_small (__main__.KernelNonSecurityTest)

Kinda weird...
But as this issue does not exist anymore I will mark this as Invalid.

[Po-Hsu Lin (cypressyew)]

I can see this again, and just like what happened here a re-run make this go away.
Maybe the test is not very robust?

This will need some investigations.

[Po-Hsu Lin (cypressyew)]

This issue can be found on T-amd64 in this cycle (3.13.0-177.228) on two different amd64 node "onibi" and "kili"

Now retesting those.

[Po-Hsu Lin (cypressyew)]

This issue can be found on Precise 3.13.0-181.232~12.04.1 i386 with KVM node precise-i386

[Po-Hsu Lin (cypressyew)]

It looks like this was caused by ubuntu_qrt_kernel_panic test which was executed before the security test.

If you just run the ubuntu-qrt-kernel-security it will pass without any issue.