1 files changed, 43 insertions, 0 deletions
diff --git a/src/test/fuzz/addrdb.cpp b/src/test/fuzz/addrdb.cpp
new file mode 100644
index 0000000000..f21ff3fac3
--- /dev/null
+++ b/src/test/fuzz/addrdb.cpp
@@ -0,0 +1,43 @@
+// Copyright (c) 2020 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <addrdb.h>
+#include <optional.h>
+#include <test/fuzz/FuzzedDataProvider.h>
+#include <test/fuzz/fuzz.h>
+#include <test/fuzz/util.h>
+
+#include <cassert>
+#include <cstdint>
+#include <string>
+#include <vector>
+
+void test_one_input(const std::vector<uint8_t>& buffer)
+{
+    FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
+
+    const CBanEntry ban_entry = [&] {
+        switch (fuzzed_data_provider.ConsumeIntegralInRange<int>(0, 3)) {
+        case 0:
+            return CBanEntry{fuzzed_data_provider.ConsumeIntegral<int64_t>()};
+            break;
+        case 1:
+            return CBanEntry{fuzzed_data_provider.ConsumeIntegral<int64_t>(), fuzzed_data_provider.PickValueInArray<BanReason>({
+                                                                                  BanReason::BanReasonUnknown,
+                                                                                  BanReason::BanReasonNodeMisbehaving,
+                                                                                  BanReason::BanReasonManuallyAdded,
+                                                                              })};
+            break;
+        case 2: {
+            const Optional<CBanEntry> ban_entry = ConsumeDeserializable<CBanEntry>(fuzzed_data_provider);
+            if (ban_entry) {
+                return *ban_entry;
+            }
+            break;
+        }
+        }
+        return CBanEntry{};
+    }();
+    assert(!ban_entry.banReasonToString().empty());
+}