Someone said:
"I love all things music."
Is something missing between "things" and "music"?
Effectively, it should say "all things to do with music" but it's a fairly well-used construction where "to do with" is not really necessary.
He loves all things film.
She loves all things fashion.
I love all things music.
It's not great, I'm sure lots of people don't like it and I certainly wouldn't recommend using it in any kind of formal test, written or oral, but you will hear it from native speakers occasionally.