Add fuzzing targets for ReadStat (#2093)

* Add ReadStat project

* Add fuzzing targets for new project ReadStat

Adding fuzzers for six file formats supported by ReadStat. A corpus
is generated in each case from example data in the test suite.

Tested locally on Linux, which check_build passing in all six cases.

projects/readstat/Dockerfile

@@ -0,0 +1,23 @@
+# Copyright 2019 Evan Miller
+#
+# 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.
+#
+################################################################################
+
+FROM gcr.io/oss-fuzz-base/base-builder
+MAINTAINER emmiller@gmail.com
+RUN apt-get update && apt-get install -y make autoconf automake libtool zip zlib1g-dev
+
+RUN git clone --depth 1 https://github.com/WizardMac/ReadStat readstat
+WORKDIR readstat
+COPY build.sh $SRC/

projects/readstat/build.sh

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+# Copyright 2019 Evan Miller
+#
+# 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.
+#
+################################################################################
+
+#!/bin/bash -eu
+
+./autogen.sh
+./configure --enable-static
+make clean
+
+make
+make generate_corpus
+./generate_corpus
+
+zip $OUT/fuzz_format_dta_seed_corpus.zip corpus/dta*/test-case-*
+zip $OUT/fuzz_format_por_seed_corpus.zip corpus/por/test-case-*
+zip $OUT/fuzz_format_sav_seed_corpus.zip corpus/sav*/test-case-* corpus/zsav/test-case-*
+zip $OUT/fuzz_format_sas7bcat_seed_corpus.zip corpus/sas7bcat/test-case-*
+zip $OUT/fuzz_format_sas7bdat_seed_corpus.zip corpus/sas7bdat*/test-case-*
+zip $OUT/fuzz_format_xport_seed_corpus.zip corpus/xpt*/test-case-*
+
+READSTAT_FUZZERS="
+    fuzz_format_dta \
+    fuzz_format_por \
+    fuzz_format_sav \
+    fuzz_format_sas7bcat \
+    fuzz_format_sas7bdat \
+    fuzz_format_xport"
+
+for fuzzer in $READSTAT_FUZZERS; do
+    make ${fuzzer}
+    cp ${fuzzer} $OUT/${fuzzer}
+done