"sched/fair: Use RCU accessors consistently for ->numa_group The old code used RCU annotations and accessors inconsistently for ->numa_group, which can lead to use-after-frees and NULL dereferences. Let all accesses to ->numa_group use proper RCU helpers to prevent such issues." upstream commit: [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cb361d8cdef69990f6b4504dc1fd9a594d983c97]