Worked on enhancing security controls in the yuwata/systemd repository by implementing SMACK security labeling for Unix sockets. This feature ensured that SMACK labels specified via configuration were consistently applied to both Unix socket paths and their associated file descriptors during socket creation and binding. The approach addressed a gap where labels were previously not propagated, thereby supporting more precise access control and policy enforcement. The work involved system programming and socket programming in C, focusing on the correct propagation of security attributes. This contribution improved the security posture of systemd’s socket activation by ensuring reliable and consistent SMACK label application.