In the Linux kernel, the following vulnerability has been resolved:
s390/perf_cpum_cf: Add missing array_index_nospec() to __hw_perf_event_init()
ev variable is userspace controlled via event->attr.config and used
as an array index after bounds checking, but without speculation
barriers.
Add the missing array_index_nospec() call to prevent speculative
execution.
References 6
https://git.kernel.org/stable/c/27206bb57c47bdbe33bccc78fa7f7e2a719a06b9
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/49145bce539117db4b6e9e83c0e5ef528e361050
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/a21f3615c88421df81060b6ff89220fd34094c4d
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/f79dff8c721bbb1f3fc312ea55e0551c2cc28801
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/fa1ebae4206e6afc8caa642e9eb1bbe39a9a724f
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/4c249b214c686f9a1c4cf4f32893b59b189e897a
416baaa9-dc9f-4396-8d5f-8c081fb06d67