fuzz: add fuzzers to test bitmap64 and domain_classify data structures (#2082)

1 files changed, 54 insertions, 0 deletions

diff --git a/fuzz/fuzz_ds_bitmap64.cpp b/fuzz/fuzz_ds_bitmap64.cpp
new file mode 100644
index 000000000..18a3fcb34
--- /dev/null
+++ b/fuzz/fuzz_ds_bitmap64.cpp
@@ -0,0 +1,54 @@
+#include "ndpi_api.h"
+#include "fuzz_common_code.h"
+
+#include <stdint.h>
+#include "fuzzer/FuzzedDataProvider.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+  FuzzedDataProvider fuzzed_data(data, size);
+  u_int16_t i, num_iteration, is_added = 0;
+  ndpi_bitmap64 *b;
+  bool rc;
+  u_int64_t value, value_added;
+
+  /* To allow memory allocation failures */
+  fuzz_set_alloc_callbacks_and_seed(size);
+
+  b = ndpi_bitmap64_alloc();
+
+  if(fuzzed_data.ConsumeBool())
+    ndpi_bitmap64_compress(b);
+
+  num_iteration = fuzzed_data.ConsumeIntegral<u_int16_t>();
+  for (i = 0; i < num_iteration; i++) {
+    value = fuzzed_data.ConsumeIntegral<u_int64_t>();
+
+    rc = ndpi_bitmap64_set(b, value);
+    /* Keep one random entry really added */
+    if (rc == true && is_added == 0 && fuzzed_data.ConsumeBool()) {
+      value_added = value;
+      is_added = 1;
+    }
+  }
+
+  if(fuzzed_data.ConsumeBool())
+    ndpi_bitmap64_compress(b);
+
+  /* "Random" search */
+  num_iteration = fuzzed_data.ConsumeIntegral<u_int8_t>();
+  for (i = 0; i < num_iteration; i++) {
+    value = fuzzed_data.ConsumeIntegral<u_int64_t>();
+
+    ndpi_bitmap64_isset(b, value);
+  }
+  /* Search of an added entry */
+  if (is_added) {
+    ndpi_bitmap64_isset(b, value_added);
+  }
+
+  ndpi_bitmap64_size(b);
+
+  ndpi_bitmap64_free(b);
+
+  return 0;
+}