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current->group_leader is stable, no need to take rcu_read_lock() and do get/put_task_struct(). Signed-off-by: Oleg Nesterov <oleg@redhat.com> Link: https://lore.kernel.org/r/20250219161417.GA20851@redhat.com Signed-off-by: Kees Cook <kees@kernel.org>