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This is a use-after-free read bug. > > Correct fix is to remove a commit which adds "free_cpumask_var(prof_cpu_mas= k);". You're right, the flag check races with the free. v2 will just remove the free_cpumask_var() call instead. > Which tree are you talking about? This is for stable (6.1.y, 6.6.y, 6.8.y) where prof_cpu_mask still exists. Thanks, Tristan