Fuzz introspector: fuzz_bundle
For issues and ideas: https://github.com/ossf/fuzz-introspector/issues

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked Calltree index Parent function Callsite Largest blocked function
114 10 ...dulwich.fuzzing.fuzz-targets.fuzz_bundle.TestOneInput call site: 00010 dulwich.pack.pack_objects_to_data
62 136 dulwich.file.GitFile call site: 00136 dulwich.bundle.write_bundle
24 199 ...dulwich.fuzzing.fuzz-targets.fuzz_bundle.TestOneInput call site: 00199 dulwich.bundle._read_bundle
7 1 ...dulwich.fuzzing.fuzz-targets.fuzz_bundle.TestOneInput call site: 00001 test_utils.EnhancedFuzzedDataProvider.PickValueInList
4 125 ...dulwich.fuzzing.fuzz-targets.fuzz_bundle.TestOneInput call site: 00125 dulwich.pack.PackData.from_file
1 133 dulwich.file._GitFile.__init__ call site: 00133 .getattr

Fuzzer calltree

0 ...dulwich.fuzzing.fuzz-targets.fuzz_bundle.TestOneInput [function] [call site] 00000
1 test_utils.EnhancedFuzzedDataProvider [function] [call site] 00001
1 test_utils.EnhancedFuzzedDataProvider.PickValueInList [function] [call site] 00002
1 test_utils.EnhancedFuzzedDataProvider.ConsumeRandomString [function] [call site] 00003
1 test_utils.EnhancedFuzzedDataProvider.ConsumeBytes [function] [call site] 00004
1 test_utils.EnhancedFuzzedDataProvider.ConsumeBytes [function] [call site] 00005
1 test_utils.EnhancedFuzzedDataProvider.ConsumeRandomBytes [function] [call site] 00006
1 test_utils.EnhancedFuzzedDataProvider.ConsumeRandomString [function] [call site] 00007
1 test_utils.EnhancedFuzzedDataProvider.ConsumeRandomString [function] [call site] 00008
1 io.BytesIO [function] [call site] 00009
1 dulwich.pack.write_pack_objects [function] [call site] 00010
2 dulwich.pack.pack_objects_to_data [function] [call site] 00011
3 <builtin>.len [function] [call site] 00012
3 dulwich.pack.deltify_pack_objects [function] [call site] 00013
4 dulwich.pack.deltify_pack_objects.objects_with_hints [function] [call site] 00014
5 <builtin>.isinstance [function] [call site] 00015
4 dulwich.pack.sort_objects_for_delta [function] [call site] 00016
5 <builtin>.isinstance [function] [call site] 00017
5 obj.raw_length [function] [call site] 00018
5 magic.append [function] [call site] 00019
5 magic.sort [function] [call site] 00020
4 dulwich.pack.deltas_from_sorted_objects [function] [call site] 00021
5 collections.deque [function] [call site] 00022
5 <builtin>.enumerate [function] [call site] 00023
5 o.as_raw_chunks [function] [call site] 00024
5 <builtin>.map [function] [call site] 00025
5 <builtin>.sum [function] [call site] 00026
5 dulwich.pack.create_delta [function] [call site] 00027
6 <builtin>.isinstance [function] [call site] 00028
6 <builtin>.isinstance [function] [call site] 00029
6 <builtin>.isinstance [function] [call site] 00030
6 <builtin>.isinstance [function] [call site] 00031
6 <builtin>.len [function] [call site] 00032
6 dulwich.pack._delta_encode_size [function] [call site] 00033
7 <builtin>.bytearray [function] [call site] 00034
7 ret.append [function] [call site] 00035
7 ret.append [function] [call site] 00036
7 <builtin>.bytes [function] [call site] 00037
6 <builtin>.len [function] [call site] 00038
6 dulwich.pack._delta_encode_size [function] [call site] 00039
6 difflib.SequenceMatcher [function] [call site] 00040
6 cdifflib.CSequenceMatcher [function] [call site] 00041
6 difflib.SequenceMatcher.get_opcodes [function] [call site] 00042
6 <builtin>.min [function] [call site] 00043
6 dulwich.pack._encode_copy_operation [function] [call site] 00044
7 <builtin>.bytearray [function] [call site] 00045
7 <builtin>.range [function] [call site] 00046
7 scratch.append [function] [call site] 00047
7 <builtin>.range [function] [call site] 00048
7 scratch.append [function] [call site] 00049
7 <builtin>.bytes [function] [call site] 00050
6 <builtin>.bytes [function] [call site] 00051
6 <builtin>.memoryview [function] [call site] 00052
6 <builtin>.bytes [function] [call site] 00053
6 <builtin>.bytes [function] [call site] 00054
6 <builtin>.memoryview [function] [call site] 00055
6 <builtin>.bytes [function] [call site] 00056
5 <builtin>.len [function] [call site] 00057
5 delta.append [function] [call site] 00058
5 dulwich.pack.UnpackedObject.__init__ [function] [call site] 00059
6 <builtin>.map [function] [call site] 00060
6 <builtin>.sum [function] [call site] 00061
5 possible_bases.appendleft [function] [call site] 00064
5 <builtin>.len [function] [call site] 00065
5 possible_bases.pop [function] [call site] 00066
3 <builtin>.iter [function] [call site] 00067
3 dulwich.pack.pack_objects_to_data.iter_without_path [function] [call site] 00068
4 <builtin>.isinstance [function] [call site] 00069
4 dulwich.pack.full_unpacked_object [function] [call site] 00070
5 dulwich.pack.UnpackedObject.__init__ [function] [call site] 00071
5 o.as_raw_chunks [function] [call site] 00072
4 dulwich.pack.full_unpacked_object [function] [call site] 00074
2 dulwich.pack.write_pack_data [function] [call site] 00075
3 dulwich.pack.PackChunkGenerator.__iter__ [function] [call site] 00076
3 dulwich.pack.PackChunkGenerator.__init__ [function] [call site] 00077
4 hashlib.sha1 [function] [call site] 00078
4 <builtin>.iter [function] [call site] 00079
4 dulwich.pack.PackChunkGenerator._pack_data_chunks [function] [call site] 00080
5 <builtin>.len [function] [call site] 00081
5 dulwich.pack.pack_header_chunks [function] [call site] 00082
6 struct.pack [function] [call site] 00083
6 struct.pack [function] [call site] 00084
5 hashlib.sha1.update [function] [call site] 00085
5 <builtin>.len [function] [call site] 00086
5 <builtin>.enumerate [function] [call site] 00087
5 <builtin>.isinstance [function] [call site] 00088
5 <builtin>.type [function] [call site] 00089
5 <builtin>.isinstance [function] [call site] 00090
5 dulwich.pack.pack_object_chunks [function] [call site] 00091
6 <builtin>.isinstance [function] [call site] 00092
6 <builtin>.isinstance [function] [call site] 00093
6 <builtin>.isinstance [function] [call site] 00094
6 <builtin>.isinstance [function] [call site] 00095
6 object.as_raw_chunks [function] [call site] 00096
6 <builtin>.map [function] [call site] 00097
6 <builtin>.sum [function] [call site] 00098
6 dulwich.pack.pack_object_header [function] [call site] 00099
7 header.append [function] [call site] 00100
7 header.append [function] [call site] 00101
7 <builtin>.isinstance [function] [call site] 00102
7 ret.insert [function] [call site] 00103
7 header.extend [function] [call site] 00104
7 <builtin>.isinstance [function] [call site] 00105
7 <builtin>.len [function] [call site] 00106
7 <builtin>.bytearray [function] [call site] 00107
6 <builtin>.bytes [function] [call site] 00108
6 zlib.compressobj [function] [call site] 00109
6 compressor.compress [function] [call site] 00110
6 compressor.flush [function] [call site] 00111
5 binascii.crc32 [function] [call site] 00112
5 hashlib.sha1.update [function] [call site] 00113
5 <builtin>.len [function] [call site] 00114
5 unpacked.sha [function] [call site] 00115
5 hashlib.sha1.digest [function] [call site] 00116
3 <builtin>.callable [function] [call site] 00117
3 dulwich.server.UploadPackHandler._start_pack_send_phase.write_data [function] [call site] 00118
3 typing.cast [function] [call site] 00119
3 dulwich.client.AbstractHttpGitClient.fetch_pack.write_fn [function] [call site] 00120
3 io.BytesIO.write [function] [call site] 00121
3 typing.cast.write [function] [call site] 00122
3 dulwich.pack.PackChunkGenerator.sha1digest [function] [call site] 00123
4 hashlib.sha1.digest [function] [call site] 00124
1 io.BytesIO.seek [function] [call site] 00125
1 dulwich.pack.PackData.from_file [function] [call site] 00126
2 <builtin>.str [function] [call site] 00127
2 dulwich.pack.PackData.__init__ [function] [call site] 00128
3 dulwich.file.GitFile [function] [call site] 00129
4 dulwich.file._GitFile.__init__ [function] [call site] 00130
5 os.fspath [function] [call site] 00131
5 <builtin>.isinstance [function] [call site] 00132
5 <builtin>.getattr [function] [call site] 00134
5 os.fdopen [function] [call site] 00135
4 <builtin>.open [function] [call site] 00136
3 dulwich.pack.read_pack_header [function] [call site] 00137
4 dulwich.contrib.swift.SwiftPackReader.read [function] [call site] 00138
5 <builtin>.len [function] [call site] 00139
5 dulwich.contrib.swift.SwiftPackReader._read [function] [call site] 00140
6 <builtin>.min [function] [call site] 00141
6 <builtin>.isinstance [function] [call site] 00142
5 dulwich.contrib.swift.SwiftPackReader.read [function] [call site] 00144
4 tempfile.SpooledTemporaryFile.read [function] [call site] 00145
4 typing.cast.read [function] [call site] 00146
4 dulwich.file._GitFile.read [function] [call site] 00147
4 io.BytesIO.read [function] [call site] 00148
4 dulwich.pack.PackStreamReader.read [function] [call site] 00149
5 dulwich.pack.PackStreamReader._buf_len [function] [call site] 00150
6 io.BytesIO.tell [function] [call site] 00151
6 io.BytesIO.seek [function] [call site] 00152
6 io.BytesIO.tell [function] [call site] 00153
6 io.BytesIO.seek [function] [call site] 00154
5 io.BytesIO.read [function] [call site] 00155
5 io.BytesIO.read [function] [call site] 00156
5 io.BytesIO [function] [call site] 00157
5 dulwich.pack.PackStreamReader._read [function] [call site] 00158
6 <builtin>.len [function] [call site] 00159
6 <builtin>.len [function] [call site] 00160
6 <builtin>.max [function] [call site] 00161
6 hashlib.sha1.update [function] [call site] 00162
6 <builtin>.range [function] [call site] 00163
6 <builtin>.bytearray [function] [call site] 00164
6 <builtin>.bytes [function] [call site] 00165
6 hashlib.sha1.update [function] [call site] 00166
5 dulwich.pack.PackStreamCopier._read [function] [call site] 00167
6 <builtin>.super [function] [call site] 00168
4 struct.unpack_from [function] [call site] 00169
4 struct.unpack_from [function] [call site] 00170
1 <builtin>.repr [function] [call site] 00171
1 io.BytesIO [function] [call site] 00172
1 dulwich.bundle.write_bundle [function] [call site] 00173
2 sys.stdout.buffer.write [function] [call site] 00174
2 io.BytesIO.write [function] [call site] 00175
2 sys.stdout.buffer.write [function] [call site] 00176
2 io.BytesIO.write [function] [call site] 00177
2 bundle.capabilities.items [function] [call site] 00178
2 key.encode [function] [call site] 00179
2 sys.stdout.buffer.write [function] [call site] 00180
2 io.BytesIO.write [function] [call site] 00181
2 value.encode [function] [call site] 00182
2 sys.stdout.buffer.write [function] [call site] 00183
2 io.BytesIO.write [function] [call site] 00184
2 sys.stdout.buffer.write [function] [call site] 00185
2 io.BytesIO.write [function] [call site] 00186
2 sys.stdout.buffer.write [function] [call site] 00187
2 io.BytesIO.write [function] [call site] 00188
2 bundle.references.items [function] [call site] 00189
2 sys.stdout.buffer.write [function] [call site] 00190
2 io.BytesIO.write [function] [call site] 00191
2 sys.stdout.buffer.write [function] [call site] 00192
2 io.BytesIO.write [function] [call site] 00193
2 dulwich.pack.write_pack_data [function] [call site] 00194
2 typing.cast [function] [call site] 00195
2 <builtin>.len [function] [call site] 00196
2 dulwich.bundle.create_bundle_from_repo._BundlePackData.iter_unpacked [function] [call site] 00197
3 <builtin>.iter [function] [call site] 00198
1 dulwich.bundle.read_bundle [function] [call site] 00199
2 <builtin>.hasattr [function] [call site] 00200
2 io.BytesIO.readline [function] [call site] 00201
2 sys.stdin.buffer.readline [function] [call site] 00202
2 dulwich.bundle._read_bundle [function] [call site] 00203
3 io.BytesIO.readline [function] [call site] 00204
3 sys.stdin.buffer.readline [function] [call site] 00205
3 line.startswith [function] [call site] 00206
3 line.split [function] [call site] 00207
3 value_bytes.decode [function] [call site] 00208
3 key.decode [function] [call site] 00209
3 io.BytesIO.readline [function] [call site] 00210
3 sys.stdin.buffer.readline [function] [call site] 00211
3 line.startswith [function] [call site] 00212
3 prerequisites.append [function] [call site] 00213
3 io.BytesIO.readline [function] [call site] 00214
3 sys.stdin.buffer.readline [function] [call site] 00215
3 line.rstrip [function] [call site] 00216
3 io.BytesIO.readline [function] [call site] 00217
3 sys.stdin.buffer.readline [function] [call site] 00218
3 sys.stdin.buffer.read [function] [call site] 00219
3 io.BytesIO.read [function] [call site] 00220
3 io.BytesIO [function] [call site] 00221
3 dulwich.pack.PackData.from_file [function] [call site] 00222
2 dulwich.bundle._read_bundle [function] [call site] 00223
1 test_utils.is_expected_exception [function] [call site] 00224