output: #fixed code
                               @PreAuthorize("hasPermission(#user, 'edit')")
  	@Validated(BaseUser.UpdateValidation.class)
  	@Transactional(propagation=Propagation.REQUIRED, readOnly=false)
  	public U updateUser(U user, @Valid U updatedUser) {
  		
  		SaUtil.validate(user != null, "userNotFound");
  		SaUtil.validateVersion(user, updatedUser);
  
  		U loggedIn = SaUtil.getLoggedInUser();
  
  		updateUserFields(user, updatedUser, loggedIn);
  		
  		userRepository.save(user);		
  		return userForClient(loggedIn);
  		
  	}
input: #vulnerable code 
                               @PreAuthorize("hasPermission(#user, 'edit')")
  	@Validated(BaseUser.UpdateValidation.class)
  	@Transactional(propagation=Propagation.REQUIRED, readOnly=false)
  	public U updateUser(U user, @Valid U updatedUser) {
  		
  		SaUtil.validate(user != null, "userNotFound");
  		user.setName(updatedUser.getName());
  		
  		if (user.isRolesEditable()) {
  			
  			Set<String> roles = user.getRoles();
  			
  			if (updatedUser.isUnverified())
  				roles.add(Role.UNVERIFIED);
  			else
  				roles.remove(Role.UNVERIFIED);
  			
  			if (updatedUser.isAdmin())
  				roles.add(Role.ADMIN);
  			else
  				roles.remove(Role.ADMIN);
  			
  			if (updatedUser.isBlocked())
  				roles.add(Role.BLOCKED);
  			else
  				roles.remove(Role.BLOCKED);
  		}
  		//user.setVersion(updatedUser.getVersion());
  		userRepository.save(user);
  		
  		U loggedIn = SaUtil.getLoggedInUser();
  		if (loggedIn.equals(user)) {
  			loggedIn.setName(user.getName());
  			loggedIn.setRoles(user.getRoles());
  		}
  		
  		return userForClient(loggedIn);
  		
  	} 
                              #location 32 
                              #vulnerability type NULL_DEREFERENCE