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c91589dc2d
fae0f836befuzz: Speed up banman fuzz target (MarcoFalke) Pull request description: Hopefully fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=34463 ACKs for top commit: practicalswift: cr ACKfae0f836be: patch looks correct and touches only `src/test/fuzz/banman.cpp` Tree-SHA512: edbad168c607d09a5f4a29639f2d0b852605dd61403334356ad35a1eac667b6ce3922b1b316fdf37a991195fbc24e947df9e37359231663f8a364e5889e28417
84 lines
3.1 KiB
C++
84 lines
3.1 KiB
C++
// Copyright (c) 2020-2021 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <banman.h>
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#include <fs.h>
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#include <netaddress.h>
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#include <test/fuzz/FuzzedDataProvider.h>
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#include <test/fuzz/fuzz.h>
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#include <test/fuzz/util.h>
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#include <test/util/setup_common.h>
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#include <util/system.h>
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#include <cstdint>
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#include <limits>
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#include <string>
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#include <vector>
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namespace {
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int64_t ConsumeBanTimeOffset(FuzzedDataProvider& fuzzed_data_provider) noexcept
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{
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// Avoid signed integer overflow by capping to int32_t max:
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// banman.cpp:137:73: runtime error: signed integer overflow: 1591700817 + 9223372036854775807 cannot be represented in type 'long'
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return fuzzed_data_provider.ConsumeIntegralInRange<int64_t>(std::numeric_limits<int64_t>::min(), std::numeric_limits<int32_t>::max());
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}
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} // namespace
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void initialize_banman()
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{
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static const auto testing_setup = MakeNoLogFileContext<>();
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}
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FUZZ_TARGET_INIT(banman, initialize_banman)
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{
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// The complexity is O(N^2), where N is the input size, because each call
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// might call DumpBanlist (or other methods that are at least linear
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// complexity of the input size).
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int limit_max_ops{300};
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FuzzedDataProvider fuzzed_data_provider{buffer.data(), buffer.size()};
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SetMockTime(ConsumeTime(fuzzed_data_provider));
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const fs::path banlist_file = gArgs.GetDataDirNet() / "fuzzed_banlist.dat";
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fs::remove(banlist_file);
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{
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BanMan ban_man{banlist_file, nullptr, ConsumeBanTimeOffset(fuzzed_data_provider)};
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while (--limit_max_ops >= 0 && fuzzed_data_provider.ConsumeBool()) {
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CallOneOf(
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fuzzed_data_provider,
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[&] {
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ban_man.Ban(ConsumeNetAddr(fuzzed_data_provider),
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ConsumeBanTimeOffset(fuzzed_data_provider), fuzzed_data_provider.ConsumeBool());
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},
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[&] {
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ban_man.Ban(ConsumeSubNet(fuzzed_data_provider),
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ConsumeBanTimeOffset(fuzzed_data_provider), fuzzed_data_provider.ConsumeBool());
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},
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[&] {
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ban_man.ClearBanned();
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},
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[&] {
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ban_man.IsBanned(ConsumeNetAddr(fuzzed_data_provider));
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},
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[&] {
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ban_man.IsBanned(ConsumeSubNet(fuzzed_data_provider));
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},
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[&] {
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ban_man.Unban(ConsumeNetAddr(fuzzed_data_provider));
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},
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[&] {
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ban_man.Unban(ConsumeSubNet(fuzzed_data_provider));
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},
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[&] {
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banmap_t banmap;
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ban_man.GetBanned(banmap);
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},
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[&] {
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ban_man.DumpBanlist();
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},
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[&] {
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ban_man.Discourage(ConsumeNetAddr(fuzzed_data_provider));
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});
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}
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}
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fs::remove(banlist_file);
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}
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