Merge pull request #51328 from tensorflow/mm-cp-15691e456c7dc9bd6be20…

…3b09765b063bf4a380c-on-r2.3

Prevent dereferencing of null pointers in TFLite's `add.cc`.

tensorflow/lite/kernels/internal/optimized/optimized_ops.h

@@ -304,7 +304,7 @@ inline void BinaryBroadcastFiveFold(const ArithmeticParams& unswitched_params,
       // We have broadcast y2*y3*y4 of input2 data y1 times, and now move on.
       input2_data_reset = input2_data_ptr;
     }
-  } else {
+  } else if (input1_data_ptr != nullptr) {
     // Special case of y4 == 1, in which the innermost loop is a single
     // element and can be combined with the next (y3) as an inner broadcast.
     //