@Douglas-Kryder i tested at around 7~8 times changing SSID back and forth; and the result was consistent. Anyway, agreed that, may be, my case is not applied for all the case as you said. I just wonder maybe someone try the SSID "하이네켄인증포어러2.4G" (without quotes) and see if the SSID triggers any kernel panic like me
the panic seems to be occurred in the wifi scan stage during the boot-time.