Process crash via zero-length embedding values

Division by zero in Google TensorFlow's TFLite EmbeddingLookup operator allows local users to crash a process with a crafted model. EvalSimple reads the value tensor's first dimension into row_size and divides the tensor's byte count by it without first rejecting zero. Exploitation requires the process to load and execute an attacker-crafted TFLite model with a zero-length first value dimension, and the documented consequence is process termination rather than data access or modification.