Branch data     Line data    Source code

       1                 :            : // Copyright (c) 2020-2022 The Bitcoin Core developers
       2                 :            : // Distributed under the MIT software license, see the accompanying
       3                 :            : // file COPYING or http://www.opensource.org/licenses/mit-license.php.
       4                 :            : 
       5                 :            : #include <banman.h>
       6                 :            : #include <common/args.h>
       7                 :            : #include <netaddress.h>
       8                 :            : #include <test/fuzz/FuzzedDataProvider.h>
       9                 :            : #include <test/fuzz/fuzz.h>
      10                 :            : #include <test/fuzz/util.h>
      11                 :            : #include <test/fuzz/util/net.h>
      12                 :            : #include <test/util/setup_common.h>
      13                 :            : #include <util/fs.h>
      14                 :            : #include <util/readwritefile.h>
      15                 :            : 
      16                 :            : #include <cassert>
      17         [ +  - ]:          2 : #include <cstdint>
      18         [ +  - ]:          2 : #include <limits>
      19                 :            : #include <string>
      20                 :            : #include <vector>
      21                 :            : 
      22                 :            : namespace {
      23                 :          0 : int64_t ConsumeBanTimeOffset(FuzzedDataProvider& fuzzed_data_provider) noexcept
      24                 :            : {
      25                 :            :     // Avoid signed integer overflow by capping to int32_t max:
      26                 :            :     // banman.cpp:137:73: runtime error: signed integer overflow: 1591700817 + 9223372036854775807 cannot be represented in type 'long'
      27         [ #  # ]:          0 :     return fuzzed_data_provider.ConsumeIntegralInRange<int64_t>(std::numeric_limits<int64_t>::min(), std::numeric_limits<int32_t>::max());
      28                 :            : }
      29                 :            : } // namespace
      30                 :            : 
      31                 :          0 : void initialize_banman()
      32                 :            : {
      33 [ #  # ][ #  # ]:          0 :     static const auto testing_setup = MakeNoLogFileContext<>();
                 [ #  # ]
      34                 :          0 : }
      35                 :            : 
      36                 :          0 : static bool operator==(const CBanEntry& lhs, const CBanEntry& rhs)
      37                 :            : {
      38         [ #  # ]:          0 :     return lhs.nVersion == rhs.nVersion &&
      39         [ #  # ]:          0 :            lhs.nCreateTime == rhs.nCreateTime &&
      40                 :          0 :            lhs.nBanUntil == rhs.nBanUntil;
      41                 :            : }
      42                 :            : 
      43         [ +  - ]:          4 : FUZZ_TARGET(banman, .init = initialize_banman)
      44                 :            : {
      45                 :          0 :     FuzzedDataProvider fuzzed_data_provider{buffer.data(), buffer.size()};
      46                 :          0 :     SetMockTime(ConsumeTime(fuzzed_data_provider));
      47         [ #  # ]:          0 :     fs::path banlist_file = gArgs.GetDataDirNet() / "fuzzed_banlist";
      48                 :            : 
      49         [ #  # ]:          0 :     const bool start_with_corrupted_banlist{fuzzed_data_provider.ConsumeBool()};
      50                 :          0 :     bool force_read_and_write_to_err{false};
      51         [ #  # ]:          0 :     if (start_with_corrupted_banlist) {
      52 [ #  # ][ #  # ]:          0 :         assert(WriteBinaryFile(banlist_file + ".json",
         [ #  # ][ #  # ]
                 [ #  # ]
      53                 :            :                                fuzzed_data_provider.ConsumeRandomLengthString()));
      54                 :          0 :     } else {
      55         [ #  # ]:          0 :         force_read_and_write_to_err = fuzzed_data_provider.ConsumeBool();
      56         [ #  # ]:          0 :         if (force_read_and_write_to_err) {
      57 [ #  # ][ #  # ]:          0 :             banlist_file = fs::path{"path"} / "to" / "inaccessible" / "fuzzed_banlist";
         [ #  # ][ #  # ]
      58                 :          0 :         }
      59                 :            :     }
      60                 :            : 
      61                 :            :     {
      62 [ #  # ][ #  # ]:          0 :         BanMan ban_man{banlist_file, /*client_interface=*/nullptr, /*default_ban_time=*/ConsumeBanTimeOffset(fuzzed_data_provider)};
      63                 :            :         // The complexity is O(N^2), where N is the input size, because each call
      64                 :            :         // might call DumpBanlist (or other methods that are at least linear
      65                 :            :         // complexity of the input size).
      66 [ #  # ][ #  # ]:          0 :         LIMITED_WHILE(fuzzed_data_provider.ConsumeBool(), 300)
                 [ #  # ]
      67                 :            :         {
      68         [ #  # ]:          0 :             CallOneOf(
      69                 :            :                 fuzzed_data_provider,
      70                 :          0 :                 [&] {
      71         [ #  # ]:          0 :                     ban_man.Ban(ConsumeNetAddr(fuzzed_data_provider),
      72         [ #  # ]:          0 :                                 ConsumeBanTimeOffset(fuzzed_data_provider), fuzzed_data_provider.ConsumeBool());
      73                 :          0 :                 },
      74                 :          0 :                 [&] {
      75         [ #  # ]:          0 :                     ban_man.Ban(ConsumeSubNet(fuzzed_data_provider),
      76         [ #  # ]:          0 :                                 ConsumeBanTimeOffset(fuzzed_data_provider), fuzzed_data_provider.ConsumeBool());
      77                 :          0 :                 },
      78                 :          0 :                 [&] {
      79                 :          0 :                     ban_man.ClearBanned();
      80                 :          0 :                 },
      81                 :          0 :                 [&] {
      82         [ #  # ]:          0 :                     ban_man.IsBanned(ConsumeNetAddr(fuzzed_data_provider));
      83         [ +  - ]:          2 :                 },
      84                 :          0 :                 [&] {
      85         [ #  # ]:          0 :                     ban_man.IsBanned(ConsumeSubNet(fuzzed_data_provider));
      86                 :          0 :                 },
      87                 :          0 :                 [&] {
      88         [ #  # ]:          0 :                     ban_man.Unban(ConsumeNetAddr(fuzzed_data_provider));
      89                 :          0 :                 },
      90                 :          0 :                 [&] {
      91         [ #  # ]:          0 :                     ban_man.Unban(ConsumeSubNet(fuzzed_data_provider));
      92                 :          0 :                 },
      93                 :          0 :                 [&] {
      94                 :          0 :                     banmap_t banmap;
      95         [ #  # ]:          0 :                     ban_man.GetBanned(banmap);
      96                 :          0 :                 },
      97                 :          0 :                 [&] {
      98                 :          0 :                     ban_man.DumpBanlist();
      99                 :          0 :                 },
     100                 :          0 :                 [&] {
     101         [ #  # ]:          0 :                     ban_man.Discourage(ConsumeNetAddr(fuzzed_data_provider));
     102                 :          0 :                 });
     103                 :          0 :         }
     104         [ #  # ]:          0 :         if (!force_read_and_write_to_err) {
     105         [ #  # ]:          0 :             ban_man.DumpBanlist();
     106         [ #  # ]:          0 :             SetMockTime(ConsumeTime(fuzzed_data_provider));
     107                 :          0 :             banmap_t banmap;
     108         [ #  # ]:          0 :             ban_man.GetBanned(banmap);
     109 [ #  # ][ #  # ]:          0 :             BanMan ban_man_read{banlist_file, /*client_interface=*/nullptr, /*default_ban_time=*/0};
     110                 :          0 :             banmap_t banmap_read;
     111         [ #  # ]:          0 :             ban_man_read.GetBanned(banmap_read);
     112 [ #  # ][ #  # ]:          0 :             assert(banmap == banmap_read);
     113                 :          0 :         }
     114                 :          0 :     }
     115 [ #  # ][ #  # ]:          0 :     fs::remove(fs::PathToString(banlist_file + ".json"));
         [ #  # ][ #  # ]
                 [ #  # ]
     116                 :          0 : }