In the Linux kernel, the following vulnerability has been resolved:

sysctl: Fix data races in proc_douintvec_minmax().

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 proc_douintvec_minmax() to use READ_ONCE() and
WRITE_ONCE() internally to fix data-races on the sysctl side. For now,
proc_douintvec_minmax() itself is tolerant to a data-race, but we still
need to add annotations on the other subsystem's side.

References

• https://nvd.nist.gov/vuln/detail/CVE-2022-49640
• https://git.kernel.org/stable/c/2d3b559df3ed39258737789aae2ae7973d205bc1
• https://git.kernel.org/stable/c/40e0477a7371d101c55b69d9c32a7a1ed82ab5ea
• https://git.kernel.org/stable/c/b60eddf98b9716651069dfda296c91311a7a6293
• https://git.kernel.org/stable/c/e3a2144b3b6bf9ecafd91087c8b8b48171ec19df