Rock music, especially punk, has strong political and social connotations that were controversial even in the west and yet I've heard of many instances of rock in communist countries in eastern Europe. Elton John famously toured the Soviet Union in 1979. Frank Zappa was apparently very popular in Czechoslovakia and was even designated a cultural ambassador. Moreover I've listened to many punk bands from Poland (Siekiera, Klaus Mittfoch, Brygada Kryzys) who were active and released albums in the 80's while Poland was still communist.
How was rock recorded, performed, or distributed behind the Iron Curtain? Was it censored or lead to political repercussions? How accepting were various communist countries to western style rock music?
I answered a fairly similar question, about why Elton toured the Soviet Union in 1979, with some context and explanation of the situation, here - hope that helps!
In Czechoslovakia most of it was allowed since the 1960s. Czechoslovakia had a thriving "Big Beat" music scene in the 60s and prog rock in the 70s, second one being a very Slovak, as opposed to Czech, phenomenon. Western records were allowed to be sold since 1980 or so, my dad has Van Halen's 1984 on LP pressed by Supraphon in Czechoslovakia, along with a lot of Western pop music.