Reference binding to nullptr in `MatrixSetDiagV*` ops

Impact An attacker can cause undefined behavior via binding a reference to null pointer in all operations of type tf.rawops.MatrixSetDiagV: python import tensorflow as tf tf.rawops.MatrixSetDiagV3 input=1,2,3, diagonal=1,1, k=, align='RIGHTLEFT' The implementation has incomplete validation that t...