([CVE-2021-29536](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29536))
*   Fixes a division by zero in `Conv2DBackpropFilter`
    ([CVE-2021-29538](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29538))
*   Fixes a heap buffer overflow in `Conv2DBackpropFilter`
    ([CVE-2021-29540](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29540))
*   Fixes a heap buffer overflow in `StringNGrams`

    // InferTypeOpInterface:
    static bool isCompatibleReturnTypes(TypeRange l, TypeRange r) {
      return ArraysAreCastCompatible(l, r);
    }
  }];
}

def TF_Conv2DBackpropFilterOp : TF_Op<"Conv2DBackpropFilter", [Pure, TF_LayoutSensitiveInterface]> {
  let summary = [{
Computes the gradients of convolution with respect to the filter.
  }];

  let arguments = (ins