int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
				   struct kvm_userspace_memory_region *mem)
{
	if (mem->slot >= KVM_USER_MEM_SLOTS)
		return -EINVAL;
	return kvm_set_memory_region(kvm, mem);
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.