fuzzer: limit input size to avoid useless testing of huge proj strings

OSGeo · Mar 24, 2019 · e658bbc · e658bbc
1 parent 36beda5
commit e658bbc
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diff --git a/test/fuzzers/build_google_oss_fuzzers.sh b/test/fuzzers/build_google_oss_fuzzers.sh
@@ -32,3 +32,6 @@ build_fuzzer()
 }
 
 build_fuzzer standard_fuzzer $(dirname $0)/standard_fuzzer.cpp
+
+echo "[libfuzzer]" > $OUT/standard_fuzzer.options
+echo "max_len = 10000" >> $OUT/standard_fuzzer.options
diff --git a/test/fuzzers/standard_fuzzer.cpp b/test/fuzzers/standard_fuzzer.cpp
@@ -64,6 +64,14 @@ int LLVMFuzzerInitialize(int* /*argc*/, char*** argv)
 
 int LLVMFuzzerTestOneInput(const uint8_t *buf, size_t len)
 {
+    if( len > 1000 )
+    {
+#ifdef STANDALONE
+        fprintf(stderr, "Input too large\n");
+#endif
+        return 0;
+    }
+
     /* We expect the blob to be 3 lines: */
     /* source proj string\ndestination proj string\nx y */
     char* buf_dup = (char*)malloc(len+1);