Comment # 1 on bug 965356 from Marcus Meissner

these changed look related.

commit 3836c309b5c1bfa8de5d74dfa3e7025a9a684bb3
Author: Jiri Slaby <jslaby@suse.cz>
Date:   Fri Nov 27 12:21:19 2015 +0100

    userns: Only allow the creator of the userns unprivileged
    mappings (bnc#906545 CVE-2014-8989).

commit acfa70b8c9980b5657484caf3b577689bcae4eb9
Author: Jiri Slaby <jslaby@suse.cz>
Date:   Fri Nov 27 12:21:19 2015 +0100

    userns: Check euid no fsuid when establishing an unprivileged
    uid mapping (bnc#906545 CVE-2014-8989).

commit 5cc48d70925926667576ca885da0251bea9d76b9
Author: Jiri Slaby <jslaby@suse.cz>
Date:   Fri Nov 27 12:21:19 2015 +0100

    userns: Don't allow unprivileged creation of gid mappings
    (bnc#906545 CVE-2014-8989).