You're getting an avc denial for this. Probably an SELinux policy problem. Let's see what they have to say.
-- Unit systemd-sysctl.service has begun starting up.
Aug 24 16:58:44 fedora audit[4157]: <audit-1400> avc: denied { sys_ptrace } for pid=4157 comm="systemd-sysctl" capability=19 scontext=system_u:system_r:systemd_sysctl_t:s0 tcontext=system_u:system_r:systemd_sysctl_t:s0 tclass=capability permissive=0
Aug 24 16:58:44 fedora systemd-sysctl[4157]: Failed to write '0' to '/proc/sys/kernel/yama/ptrace_scope': Operation not permitted
Aug 24 16:58:44 fedora systemd[1]: systemd-sysctl.service: main process exited, code=exited, status=1/FAILURE
Aug 24 16:58:44 fedora systemd[1]: Failed to start Apply Kernel Variables.
-- Subject: Unit systemd-sysctl.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit systemd-sysctl.service has failed.
Description of problem: Failed to start Apply Kernel Variables. systemd-sysctl.service fails to load Version-Release number of selected component (if applicable): kernel-4.1.4-200.fc22.x86_64 systemd-219-21.fc22.x86_64 How reproducible: Always Steps to Reproduce: 1. 2. 3. Actual results: Expected results: Additional info: systemctl status systemd-sysctl.service ● systemd-sysctl.service - Apply Kernel Variables Loaded: loaded (/usr/lib/systemd/system/systemd-sysctl.service; static; vendor preset: disabled) Active: failed (Result: exit-code) since Mon 2015-08-24 16:49:14 IST; 7min ago Docs: man:systemd-sysctl.service(8) man:sysctl.d(5) Process: 3569 ExecStart=/usr/lib/systemd/systemd-sysctl (code=exited, status=1/FAILURE) Main PID: 3569 (code=exited, status=1/FAILURE) Aug 24 16:49:14 fedora systemd[1]: Starting Apply Kernel Variables... Aug 24 16:49:14 fedora systemd[1]: systemd-sysctl.service: main process exited, code=exited, status=1/FAILURE Aug 24 16:49:14 fedora systemd[1]: Failed to start Apply Kernel Variables. Aug 24 16:49:14 fedora systemd[1]: Unit systemd-sysctl.service entered failed state. Aug 24 16:49:14 fedora systemd[1]: systemd-sysctl.service failed.