Created attachment 1261763 [details] reproducer gssproxy checks the contents of the GSS_USE_PROXY envvar in order to determine whether it should be used. rpc.gssd is causing secure_getenv() to return NULL on this variable, which breaks gssproxy.
Attached is a Vagrantfile helpfully provided by the original reporter on the gssproxy mailing list. To see the problem, break on gss_mech_interposer() and observe the return value from gp_getenv() (which wraps secure_getenv()).
Ok apparently this turns out to be a similar problem to https://bugzilla.redhat.com/show_bug.cgi?id=1174915 So reassigning to SELinuc Policy
Other similar bug: https://bugzilla.redhat.com/show_bug.cgi?id=1358476 Do we have a systemic issue ?
selinux-policy-3.13.1-225.13.fc25 has been submitted as an update to Fedora 25. https://bodhi.fedoraproject.org/updates/FEDORA-2017-0af0456dcc
selinux-policy-3.13.1-225.13.fc25 has been pushed to the Fedora 25 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-0af0456dcc
selinux-policy-3.13.1-225.13.fc25 has been pushed to the Fedora 25 stable repository. If problems still persist, please make note of it in this bug report.