Add fuzzer for DecodeCSV Op.

We fix to only 4 columns in the fuzzer for now.

PiperOrigin-RevId: 274923013
Change-Id: I734d102b278e4f6098650f8a4fc2596c21be9bd9

tensorflow/core/kernels/fuzzing/BUILD

@@ -72,3 +72,7 @@ tf_ops_fuzz_target_lib("one_hot")
 tf_ops_fuzz_target_lib("scatter_nd")
 
 tf_oss_fuzz_corpus("scatter_nd")
+
+tf_ops_fuzz_target_lib("decode_csv")
+
+tf_oss_fuzz_corpus("decode_csv")

tensorflow/core/kernels/fuzzing/corpus/decode_csv/283a87da22c3e0e7cdf53a6828f629254fe53ebb

@@ -0,0 +1,9 @@
+圹圹圹圹圹圹圹圹圹圹圹圹,,,,,,,,aa,圹,,,aa,"x","x(,",
+,"x(,","x(,",a,"x","x(,",
+,"x(,","xb",,,,,詾駻,,,,,,,,,,,,,,,,"x","x(,",
+,"x(,","x(,",a,"x","x(,",
+,"x(,","xb",圹圹圹圹圹圹圹圹,,,,,,,,aa,"x","x(,",
+,"x(,","x(,",a,"x","x(,",
+,"x(,","xb",,,,,詾駻,,,,,,,,,,,,,,,,"x","x(,",
+,"x(,","x(,",a,"x","x(,",
+,"x(,","xb",,,,,詾駻,,,,,,,,,,,,,,,,,,<,,,,,,,,,,,,,,,,<2C>,

tensorflow/core/kernels/fuzzing/corpus/decode_csv/44acc2aba022cada4f6f6745232b6d76749e54a9

@@ -0,0 +1,2 @@
+a¨,b",
+,a,xd",,

tensorflow/core/kernels/fuzzing/corpus/decode_csv/61317d2434a1af0da4e8ae7cdbd213b23572f9a5

@@ -0,0 +1,2 @@
+a,,b,,,
+a&x",d,

tensorflow/core/kernels/fuzzing/corpus/decode_csv/7331d2616685f209d090e1ccb83e97a779a96f75

@@ -0,0 +1,2 @@
+cx""x",@@@À@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@Àº@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@Àº@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
+,"a

tensorflow/core/kernels/fuzzing/corpus/decode_csv/a6ef373bd6b4fa6eb22ef1bd2fe48b932c94a688

@@ -0,0 +1,4 @@
+,,bD
+Db
+a,,,fa;x",
+,

tensorflow/core/kernels/fuzzing/corpus/decode_csv/eaf97dfae78a3f435c7f376be52e5c7be203571d

@@ -0,0 +1 @@
+f,,,,b,",t,f,,b,b,",t,f,,b,"

tensorflow/core/kernels/fuzzing/decode_csv_fuzz.cc

@@ -0,0 +1,38 @@
+/* Copyright 2016 Google Inc. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+==============================================================================*/
+
+#include "tensorflow/cc/ops/standard_ops.h"
+#include "tensorflow/core/kernels/fuzzing/fuzz_session.h"
+
+namespace tensorflow {
+namespace fuzzing {
+
+class FuzzDecodeCsv : public FuzzStringInputOp {
+  void BuildGraph(const Scope& scope) override {
+    auto input =
+        tensorflow::ops::Placeholder(scope.WithOpName("input"), DT_STRING);
+    // For now, assume we want CSVs with 4 columns, as we need a refactoring
+    // of the entire infrastructure to support the more complex usecase due to
+    // the fact that graph generation and fuzzing data are at separate steps.
+    InputList defaults = {Input("a"), Input("b"), Input("c"), Input("d")};
+    (void)tensorflow::ops::DecodeCSV(scope.WithOpName("output"), input,
+                                     defaults);
+  }
+};
+
+STANDARD_TF_FUZZ_FUNCTION(FuzzDecodeCsv);
+
+}  // end namespace fuzzing
+}  // end namespace tensorflow