CVE-2022-49634 Information

Description

In the Linux kernel the following vulnerability has been resolved:

sysctl: Fix data-races in proc_dou8vec_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_dou8vec_minmax() to use READ_ONCE() and WRITE_ONCE() internally to fix data-races on the sysctl side. For now proc_dou8vec_minmax() itself is tolerant to a data-race but we still need to add annotations on the other subsystem’s side.

Reference

https://git.kernel.org/stable/c/5f776daef0b5354615ec4b4234cd9539ca05f273 https://git.kernel.org/stable/c/7dee5d7747a69aa2be41f04c6a7ecfe3ac8cdf18 https://git.kernel.org/stable/c/e58b02e445463065b4078bf621561da75197853f https://git.kernel.org/stable/c/f177b382c33900d0e5a9766493c11a1074076f78