Stealing, murdering, raping, you name it.
Food, clothes, tech, that's all related to logistic problems.
Crimes against civilians, well, that has happened in every single war.
Did anyone gave an order to shoot at civilians, or is it an individual (moral) choice of every soldier, that's another question.
One thing is clear tho, - any disobiedience, in Russian army, might be fatal, given the reports, that they're shooting their own 20 y.olds, for helping Ukrainian elders etc.