drivers/perf: hisi: hns3: Fix out-of-bound access when valid event group

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: drivers/perf: hisi: hns3: 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 event_group array. If the number of events in an event_group is greater than HNS3_PMU_MAX_HW_EVENTS, the memory write overflow of event_group 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 event_group. [1] perf stat -e '{pmu/event1/, ... ,pmu/event9/}

References

• https://git.kernel.org/stable/c/3669baf308308385a2ab391324abdde5682af5aa
• https://git.kernel.org/stable/c/be1fa711e59c874d049f592aef1d4685bdd22bdf
• https://git.kernel.org/stable/c/b5120d322763c15c978bc47beb3b6dff45624304
• https://git.kernel.org/stable/c/aa2d3d678895c8eedd003f1473f87d3f06fe6ec7
• https://git.kernel.org/stable/c/81bdd60a3d1d3b05e6cc6674845afb1694dd3a0e