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Merge bitcoin/bitcoin#21936: fuzz: Terminate immediately if a fuzzing harness tries to create a TCP socket (belt and suspenders)

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393992b049d3bcf0b2a3439be128d13d6567f0b1 fuzz: Terminate immediately if a fuzzing harness ever tries to create a TCP socket (belt and suspenders) (practicalswift)

Pull request description:

  Terminate immediately if a fuzzing harness ever to create a TCP socket (belt and suspenders).

  Obviously this _should_ never happen, but if it _does_ happen we want immediate termination instead of a TCP socket :)

ACKs for top commit:
  MarcoFalke:
    ACK 393992b049d3bcf0b2a3439be128d13d6567f0b1

Tree-SHA512: 5bbff1f7e9a58b3eae24f742b7daf3fc870424c985f29bed5931e47a708d9c0984bfd8762f43658cffa9c69d32f86d56deb48bc7e43821e3398052174b6a160e
This commit is contained in:
MarcoFalke 2021-05-21 09:00:16 +02:00 committed by pasta
parent 26ff28a028
commit 6c242da723
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1 changed files with 8 additions and 0 deletions
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8
src/test/fuzz/fuzz.cpp
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@ -4,11 +4,16 @@
#include <test/fuzz/fuzz.h> #include <test/fuzz/fuzz.h>
#include <netaddress.h>
#include <netbase.h>
#include <test/util/setup_common.h> #include <test/util/setup_common.h>
#include <util/check.h> #include <util/check.h>
#include <util/sock.h>
#include <cstdint> #include <cstdint>
#include <string> #include <string>
#include <exception>
#include <memory>
#include <unistd.h> #include <unistd.h>
#include <vector> #include <vector>
@ -30,6 +35,9 @@ static TypeTestOneInput* g_test_one_input{nullptr};
void initialize() void initialize()
{ {
// Terminate immediately if a fuzzing harness ever tries to create a TCP socket.
CreateSock = [](const CService&) -> std::unique_ptr<Sock> { std::terminate(); };
// Terminate immediately if a fuzzing harness ever tries to perform a DNS lookup. // Terminate immediately if a fuzzing harness ever tries to perform a DNS lookup.
g_dns_lookup = [](const std::string& name, bool allow_lookup) { g_dns_lookup = [](const std::string& name, bool allow_lookup) {
if (allow_lookup) { if (allow_lookup) {