Dear Red Hat-team,

please backport the following commit into all maintained RHEL-versions, as it avoids a potential malloc null pointer issue potentially critical for validation:

nss: Missing checks in __nss_configure_lookup, __nss_database_get (bug 28940)
This avoids a null pointer dereference in the
nss_database_check_reload_and_get function, and assertion failures.

Thank you
Alexander