sysctl: Fix data races in proc_douintvec().
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 v5.15.56 by commit d335db59f7fb3353f56e52371f1ee796ae9c8f09, it was introduced in version v4.8 by commit e7d316a02f683864a12389f8808570e37fb90aa3. For more details please see the references link.