CVE-2024-38569: drivers/perf: hisi_pcie: Fix out-of-bound access when valid event group

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

drivers/perf: hisipcie: Fix out-of-bound access when valid event group

The perf tool allows users to create event groups through following cmd [1], but the driver does not check whether the array index is out of bounds when writing data to the eventgroup array. If the number of events in an eventgroup is greater than HISIPCIEMAXCOUNTERS, the memory write overflow of eventgroup array occurs.

Add array index check to fix the possible array out of bounds violation, and return directly when write new events are written to array bounds.

There are 9 different events in an eventgroup. [1] perf stat -e '{pmu/event1/, ... ,pmu/event9/}'