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The system crashes due to the cdev structure being invalid (as already freed) which is pointed to by the inode."},{"lang":"es","value":"Se presenta un uso de la memoria previamente liberada en kernel versiones anteriores a 5.5, debido a una condición de carrera entre la liberación de ptp_clock y cdev durante la desasignación de recursos. Cuando un proceso (muy privilegiado) asigna un archivo de dispositivo ptp (como /dev/ptpX) y voluntariamente se va a dormir. Durante este tiempo, si el dispositivo subyacente es removido, puede causar una condición explotable a medida que el proceso se activa para terminar y limpiar todos los archivos adjuntos. El sistema se bloquea debido a que la estructura cdev no está siendo válida (ya que se ha liberado), lo cual señala el 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