Swedes don't seem to use dormitories in the North American sense. No bunks or rows of beds with shared bathroom facilities down the hallway.
'Korridor' involves several (5 to ten seems common) separate rooms along a 'corridor' (or what I'd call a hallway) each with their own bathroom but where they all share a kitchen and dinning area -- what the reference calls 'student room' in the header and 'corridor room' in the text. Where you can lock your own door.

One son lived in a student apartment with two bedrooms on opposite sides a larger room with kitchen, eating, and living room spaces, and with its own bathroom. This would be a 'student flat,'

Thing is, the university doesn't usually get involved in building or running these things and most are owned by property companies, like the reference. So 'residence hall' is slightly misleading where in university town Uppsala there are student corridor buildings miles away from campus, owned by private builders, and which are treated like regular apartment buildings, not university halls of residence. They simply have different rules for who can rent and such.