i am actually experiencing the same error, except my kworker is kworker/4:1+pm
I see the same thing, with or without safe mode, with or without the array started, and I have unplugged just about everything as well but no avail to me.
The article that @JorgeB pointed out, i have looked at it as well but i am not sure if the results that come out of that are the problem or not, i.e