GSD-2022-1004866 cipso: Fix data-races around sysctl.

cipso: Fix data-races around sysctl. This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v4.14.289 by commit c321e99d2725d11f7e6a4ebd9ce752259f0bae8...