The Soviet Union today publicly criticized the Polish Communist Party for failing to stop a recent "antisocialist" meeting at Warsaw University allegedly organized by the Committee for Social Self-Defense (KOR).

The unusual attack that openly called into question the vigilance of the Polish party coincided with the arrival here of West German Foreign Minister Hans-Dietrich Genscher for Kremlin talks on East-West relations and the Polish crisis.

In another indication of Soviet displeasure with the Polish government, the news agency Tass charged tonight that the independent Polish trade union Solidarity had fabricated a story about police beatings of unionists in Bydgoszcz as a pretext to launch a general strike.

Tass said "wounds" suffered in the incident by Solidarity official Jan Rulewski were incurred a day earlier when the car Rulewski was driving ran over and killed a pedestrian. The Polish government had publicly conceded that police were involved in the beating of unionists at Bydgoszcz.

Last week, as Poland's crisis over the threatened nationwide strike was gathering force, Tass indirectly criticized the government of party leader Stanislaw Kania for allowing strike instructions to the broadcast over Poland's state television.

But today, the authoritative daily Pravda took the Polish party to task over the Warsaw University meeting.

Pravda quoted speakers at the meeting as saying that Marxism in Poland had failed and singled out a professor named Krajewski as having said that fascism was superior to Marxism. Pravda also asserted that KOR leader Adam Michnik had launched "unbridled attacks on the socialist system in Poland" and called for a national, democratic government.

"The so-called scientific meeting was marked by a malaicious antiSoviet and antisocialist trend," Pravda said. "Its organizers sought to claim that socialism is not suited for Poland and declared that the only force that could become the leading one in society was not the Polish Communist Party but counterrevolutionaries from KOR."

Pravda continued: "It is noted here that the Warsaw party organizations did not make any kind of ideological rebuff to those who spoke at the meeting. Some in Poland still express doubts about the existence [in Poland] of antisocialist forces. But are further proofs of their life and activity required after [this meeting]?"

Genscher, here on a two-day visit, is the first major Western figure to meet with Kremlin leaders since President Reagan took office.

Relations between Moscow and Bonn are strained by Soviet anger over Chancellor Helmut Schmidt's quick rejection of a Soviet-proposed deployment freeze on medium-range missiles in Europe while talks begin on reducing each side's arsenal.