Linux Kernel cpufreq Policy Reference Counting Vulnerability in amd-pstate

A vulnerability in the Linux kernel's cpufreq policy handling for the amd-pstate driver has been addressed. The issue arose because the function amd_pstate_update_limits() improperly managed reference counting for cpufreq_policy. It took a reference but failed to decrement it in one of the exit paths, leading to a potential memory management issue.

Impact

The vulnerability could lead to a memory leak or improper memory management by not correctly decrementing the reference count, potentially causing issues in resource allocation or leading to use-after-free vulnerabilities.