I added the code reference for the wpad-mini package on github. https://github.com/kukulo2011/Openwrt_CC_Krack_wpad-mini
If you are too afraid to install, you can still build a single package according to Openwrt wiki or wait for an official update.
The build of the wpad-mini took me around 1 hour on core i5 running ubuntu. Pushing and updating the router took 5 mins.