CVE-2021-46939

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A vulnerability in the Linux kernel has been resolved, related to the tracing feature. The issue occurred when a fix to the ring buffer recursion detection caused a hung machine during suspend/resume testing. The problem arose from the trace clock global() function taking a spin lock and then trying to take it again, resulting in a dead lock. To address this, the trace clock global() code was restructured to never block, using a trylock to grab the lock for updating the prev time and retrying if it fails.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.