CVE-2025-38055 perf/x86/intel: Fix segfault with PEBS-via-PT with sample_freq

In the Linux kernel, the following vulnerability has been resolved: perf/x86/intel: Fix segfault with PEBS-via-PT with samplefreq Currently, using PEBS-via-PT with a sample frequency instead of a sample period, causes a segfault. For example: BUG: kernel NULL pointer dereference, address:...