linux 4.4.0-139.165 ADT test failure with linux 4.4.0-139.165

[Khaled El Mously]

Testing failed on:
    amd64: https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-xenial/xenial/amd64/l/linux/20181031_081513_a6a49@/log.gz
    i386: https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-xenial/xenial/i386/l/linux/20181031_104204_a6a49@/log.gz
    ppc64el: https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-xenial/xenial/ppc64el/l/linux/20181031_062840_a6a49@/log.gz
    s390x: https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-xenial/xenial/s390x/l/linux/20181031_055910_a6a49@/log.gz

[Khaled El Mously (kmously)]

The commit "c714676a1 proc: restrict kernel stack dumps to root" (part of the update to linux-stable 4.4.160) has changed the permissions of /proc/self/stack to be root- and CAP_SYS_ADMIN-only which is causing test_095_kernel_symbols_missing_proc_self_stack to fail

[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 1800976

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.

[Po-Hsu Lin (cypressyew)]

It looks like there is a nbd related failure in the test report.
I will split the kernel_security one first to nail them down one by one:
https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/1802069