From 393992b049d3bcf0b2a3439be128d13d6567f0b1 Mon Sep 17 00:00:00 2001
From: practicalswift <practicalswift@users.noreply.github.com>
Date: Thu, 20 May 2021 19:01:46 +0000
Subject: fuzz: Terminate immediately if a fuzzing harness ever tries to create
 a TCP socket (belt and suspenders)

---
 src/test/fuzz/fuzz.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/test/fuzz/fuzz.cpp b/src/test/fuzz/fuzz.cpp
index 0d8d960d56..631c861bb6 100644
--- a/src/test/fuzz/fuzz.cpp
+++ b/src/test/fuzz/fuzz.cpp
@@ -4,10 +4,15 @@
 
 #include <test/fuzz/fuzz.h>
 
+#include <netaddress.h>
+#include <netbase.h>
 #include <test/util/setup_common.h>
 #include <util/check.h>
+#include <util/sock.h>
 
 #include <cstdint>
+#include <exception>
+#include <memory>
 #include <unistd.h>
 #include <vector>
 
@@ -29,6 +34,9 @@ static TypeTestOneInput* g_test_one_input{nullptr};
 
 void initialize()
 {
+    // Terminate immediately if a fuzzing harness ever tries to create a TCP socket.
+    CreateSock = [](const CService&) -> std::unique_ptr<Sock> { std::terminate(); };
+
     bool should_abort{false};
     if (std::getenv("PRINT_ALL_FUZZ_TARGETS_AND_ABORT")) {
         for (const auto& t : FuzzTargets()) {
-- 
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