The Chinese are the only ones capable of ending this madness.
They already started to pressure the rocket man: shutting down NK business interests in China. China accounts for over 80% of NK trade. If they call home the Chinese businesses from NK will cut most of funding for Kim's projects.
Ofcourse, the Chinese can be behind this whole drama only to come out as the savior. 
Problem is drying Kim's funding also means little food, medicine getting into NK so the already suffering north Koreans will bear the brunt of it.