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| author | MarcoFalke <falke.marco@gmail.com> | 2021-06-07 09:03:40 +0200 |
|---|---|---|
| committer | MarcoFalke <falke.marco@gmail.com> | 2021-06-07 09:03:44 +0200 |
| commit | 912cb594901b1a5dd99aa4c00be34ae36512bc57 (patch) | |
| tree | da416303718462096655a454016e153e3056019a /src | |
| parent | 791f985a60726febca3053453c2710407529fd0a (diff) | |
| parent | 3737d35fee283968f12e0772aa27aee4981fce41 (diff) | |
Merge bitcoin/bitcoin#21795: fuzz: Terminate immediately if a fuzzing harness tries to perform a DNS lookup (belt and suspenders)
3737d35fee283968f12e0772aa27aee4981fce41 fuzz: Terminate immediately if a fuzzing harness ever tries to perform a DNS lookup (belts and suspenders) (practicalswift)
Pull request description:
Terminate immediately if a fuzzing harness tries to perform a DNS lookup (belt and suspenders).
Obviously this _should_ never happen, but if it _does_ happen we want immediate termination instead of a DNS lookup :)
ACKs for top commit:
MarcoFalke:
review ACK 3737d35fee283968f12e0772aa27aee4981fce41
Tree-SHA512: 51cd2d32def7f9f052e02f99c354656af1f807cc9fdf592ab765e620bfe660f1ed26e0484763f94aba650424b44959eafaf352bfd0f81aa273e350510e97356e
Diffstat (limited to 'src')
| -rw-r--r-- | src/test/fuzz/fuzz.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/test/fuzz/fuzz.cpp b/src/test/fuzz/fuzz.cpp index 631c861bb6..a33297e0ed 100644 --- a/src/test/fuzz/fuzz.cpp +++ b/src/test/fuzz/fuzz.cpp @@ -13,6 +13,7 @@ #include <cstdint> #include <exception> #include <memory> +#include <string> #include <unistd.h> #include <vector> @@ -37,6 +38,14 @@ 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. + g_dns_lookup = [](const std::string& name, bool allow_lookup) { + if (allow_lookup) { + std::terminate(); + } + return WrappedGetAddrInfo(name, false); + }; + bool should_abort{false}; if (std::getenv("PRINT_ALL_FUZZ_TARGETS_AND_ABORT")) { for (const auto& t : FuzzTargets()) { |