Incomplete validation in signal ops leads to crashes in TensorFlow
### Impact
The `tf.compat.v1.signal.rfft2d` and `tf.compat.v1.signal.rfft3d` lack input validation and under certain condition can result in crashes (due to `CHECK`-failures).
### Patches
We have patched the issue in GitHub commit 0a8a781e597b18ead006d19b7d23d0a369e9ad73
https://github.com/tensorflow/tensorflow/commit/0a8a781e597b18ead006d19b7d23d0a369e9ad73 (merging GitHub PR #55274
https://github.com/tensorflow/tensorflow/pull/55274)
The fix will be included in TensorFlow 2.9.0. We will also cherrypick this commit on TensorFlow 2.8.1, TensorFlow 2.7.2, and TensorFlow 2.6.4, 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 externally via a GitHub issue
https://github.com/tensorflow/tensorflow/issues/55263.