In the Linux kernel, the following vulnerability has been resolved:
sysctl: Fix data races in proc_douintvec().
A sysctl variable is accessed concurrently, and there is always a chance of data-race. So, all readers and writers need some basic protection to avoid load/store-tearing.
This patch changes procdouintvec() to use READONCE() and WRITEONCE() internally to fix data-races on the sysctl side. For now, procdouintvec() itself is tolerant to a data-race, but we still need to add annotations on the other subsystem's side.