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
106 10 ...dulwich.fuzzing.fuzz-targets.fuzz_bundle.TestOneInput call site: 00010 dulwich.pack.pack_objects_to_data
61 128 dulwich.file.GitFile call site: 00128 dulwich.bundle.write_bundle
24 190 ...dulwich.fuzzing.fuzz-targets.fuzz_bundle.TestOneInput call site: 00190 dulwich.bundle._read_bundle
7 1 ...dulwich.fuzzing.fuzz-targets.fuzz_bundle.TestOneInput call site: 00001 test_utils.EnhancedFuzzedDataProvider.PickValueInList
4 117 ...dulwich.fuzzing.fuzz-targets.fuzz_bundle.TestOneInput call site: 00117 dulwich.pack.PackData.from_file
1 125 dulwich.file._GitFile.__init__ call site: 00125 .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.deltas_from_sorted_objects [function] [call site] 00014
5 collections.deque [function] [call site] 00015
5 <builtin>.enumerate [function] [call site] 00016
5 o.as_raw_chunks [function] [call site] 00017
5 <builtin>.map [function] [call site] 00018
5 <builtin>.sum [function] [call site] 00019
5 dulwich.pack.create_delta [function] [call site] 00020
6 <builtin>.isinstance [function] [call site] 00021
6 <builtin>.isinstance [function] [call site] 00022
6 <builtin>.isinstance [function] [call site] 00023
6 <builtin>.isinstance [function] [call site] 00024
6 <builtin>.len [function] [call site] 00025
6 dulwich.pack._delta_encode_size [function] [call site] 00026
7 <builtin>.bytearray [function] [call site] 00027
7 ret.append [function] [call site] 00028
7 ret.append [function] [call site] 00029
7 <builtin>.bytes [function] [call site] 00030
6 <builtin>.len [function] [call site] 00031
6 dulwich.pack._delta_encode_size [function] [call site] 00032
6 cdifflib.CSequenceMatcher [function] [call site] 00033
6 difflib.SequenceMatcher [function] [call site] 00034
6 cdifflib.CSequenceMatcher.get_opcodes [function] [call site] 00035
6 <builtin>.min [function] [call site] 00036
6 dulwich.pack._encode_copy_operation [function] [call site] 00037
7 <builtin>.bytearray [function] [call site] 00038
7 <builtin>.range [function] [call site] 00039
7 scratch.append [function] [call site] 00040
7 <builtin>.range [function] [call site] 00041
7 scratch.append [function] [call site] 00042
7 <builtin>.bytes [function] [call site] 00043
6 <builtin>.bytes [function] [call site] 00044
6 <builtin>.memoryview [function] [call site] 00045
6 <builtin>.bytes [function] [call site] 00046
6 <builtin>.memoryview [function] [call site] 00047
5 <builtin>.len [function] [call site] 00048
5 delta.append [function] [call site] 00049
5 dulwich.pack.UnpackedObject.__init__ [function] [call site] 00050
6 <builtin>.map [function] [call site] 00051
6 <builtin>.sum [function] [call site] 00052
5 possible_bases.appendleft [function] [call site] 00055
5 <builtin>.len [function] [call site] 00056
5 possible_bases.pop [function] [call site] 00057
4 dulwich.pack.deltify_pack_objects.objects_with_hints [function] [call site] 00058
5 <builtin>.isinstance [function] [call site] 00059
4 dulwich.pack.sort_objects_for_delta [function] [call site] 00060
5 <builtin>.isinstance [function] [call site] 00061
5 obj.raw_length [function] [call site] 00062
5 magic.append [function] [call site] 00063
5 magic.sort [function] [call site] 00064
3 <builtin>.iter [function] [call site] 00065
3 dulwich.pack.pack_objects_to_data.iter_without_path [function] [call site] 00066
4 <builtin>.isinstance [function] [call site] 00067
4 dulwich.pack.full_unpacked_object [function] [call site] 00068
5 dulwich.pack.UnpackedObject.__init__ [function] [call site] 00069
5 o.as_raw_chunks [function] [call site] 00070
4 dulwich.pack.full_unpacked_object [function] [call site] 00072
2 dulwich.pack.write_pack_data [function] [call site] 00073
3 dulwich.pack.PackChunkGenerator.__iter__ [function] [call site] 00074
3 dulwich.pack.PackChunkGenerator.__init__ [function] [call site] 00075
4 hashlib.sha1 [function] [call site] 00076
4 dulwich.pack.PackChunkGenerator._pack_data_chunks [function] [call site] 00077
5 <builtin>.len [function] [call site] 00078
5 dulwich.pack.pack_header_chunks [function] [call site] 00079
6 struct.pack [function] [call site] 00080
6 struct.pack [function] [call site] 00081
5 hashlib.sha1.update [function] [call site] 00082
5 <builtin>.len [function] [call site] 00083
5 <builtin>.enumerate [function] [call site] 00084
5 <builtin>.isinstance [function] [call site] 00085
5 dulwich.pack.pack_object_chunks [function] [call site] 00086
6 <builtin>.isinstance [function] [call site] 00087
6 <builtin>.isinstance [function] [call site] 00088
6 <builtin>.isinstance [function] [call site] 00089
6 <builtin>.isinstance [function] [call site] 00090
6 object.as_raw_chunks [function] [call site] 00091
6 <builtin>.map [function] [call site] 00092
6 <builtin>.sum [function] [call site] 00093
6 dulwich.pack.pack_object_header [function] [call site] 00094
7 header.append [function] [call site] 00095
7 header.append [function] [call site] 00096
7 <builtin>.isinstance [function] [call site] 00097
7 ret.insert [function] [call site] 00098
7 header.extend [function] [call site] 00099
7 <builtin>.isinstance [function] [call site] 00100
7 <builtin>.len [function] [call site] 00101
7 <builtin>.bytearray [function] [call site] 00102
6 <builtin>.bytes [function] [call site] 00103
6 zlib.compressobj [function] [call site] 00104
6 compressor.compress [function] [call site] 00105
6 compressor.flush [function] [call site] 00106
5 binascii.crc32 [function] [call site] 00107
5 hashlib.sha1.update [function] [call site] 00108
5 <builtin>.len [function] [call site] 00109
5 unpacked.sha [function] [call site] 00110
5 hashlib.sha1.digest [function] [call site] 00111
3 sys.stdout.buffer.write [function] [call site] 00112
3 functools.partial [function] [call site] 00113
3 io.BytesIO.write [function] [call site] 00114
3 dulwich.pack.PackChunkGenerator.sha1digest [function] [call site] 00115
4 hashlib.sha1.digest [function] [call site] 00116
1 io.BytesIO.seek [function] [call site] 00117
1 dulwich.pack.PackData.from_file [function] [call site] 00118
2 <builtin>.str [function] [call site] 00119
2 dulwich.pack.PackData.__init__ [function] [call site] 00120
3 dulwich.file.GitFile [function] [call site] 00121
4 dulwich.file._GitFile.__init__ [function] [call site] 00122
5 os.fspath [function] [call site] 00123
5 <builtin>.isinstance [function] [call site] 00124
5 <builtin>.getattr [function] [call site] 00126
5 os.fdopen [function] [call site] 00127
4 <builtin>.open [function] [call site] 00128
3 dulwich.pack.read_pack_header [function] [call site] 00129
4 dulwich.file._GitFile.read [function] [call site] 00130
4 tempfile.SpooledTemporaryFile.read [function] [call site] 00131
4 dulwich.contrib.swift.SwiftPackReader.read [function] [call site] 00132
5 <builtin>.len [function] [call site] 00133
5 dulwich.contrib.swift.SwiftPackReader._read [function] [call site] 00134
6 <builtin>.min [function] [call site] 00135
6 <builtin>.isinstance [function] [call site] 00136
5 dulwich.contrib.swift.SwiftPackReader.read [function] [call site] 00138
4 typing.cast.read [function] [call site] 00139
4 dulwich.pack.PackStreamReader.read [function] [call site] 00140
5 dulwich.pack.PackStreamReader._buf_len [function] [call site] 00141
6 io.BytesIO.tell [function] [call site] 00142
6 io.BytesIO.seek [function] [call site] 00143
6 io.BytesIO.tell [function] [call site] 00144
6 io.BytesIO.seek [function] [call site] 00145
5 io.BytesIO.read [function] [call site] 00146
5 io.BytesIO.read [function] [call site] 00147
5 io.BytesIO [function] [call site] 00148
5 dulwich.pack.PackStreamReader._read [function] [call site] 00149
6 <builtin>.len [function] [call site] 00150
6 <builtin>.len [function] [call site] 00151
6 <builtin>.max [function] [call site] 00152
6 hashlib.sha1.update [function] [call site] 00153
6 <builtin>.range [function] [call site] 00154
6 <builtin>.bytearray [function] [call site] 00155
6 <builtin>.bytes [function] [call site] 00156
6 hashlib.sha1.update [function] [call site] 00157
5 dulwich.pack.PackStreamCopier._read [function] [call site] 00158
6 <builtin>.super [function] [call site] 00159
4 io.BytesIO.read [function] [call site] 00160
4 struct.unpack_from [function] [call site] 00161
4 struct.unpack_from [function] [call site] 00162
1 <builtin>.repr [function] [call site] 00163
1 io.BytesIO [function] [call site] 00164
1 dulwich.bundle.write_bundle [function] [call site] 00165
2 sys.stdout.buffer.write [function] [call site] 00166
2 io.BytesIO.write [function] [call site] 00167
2 sys.stdout.buffer.write [function] [call site] 00168
2 io.BytesIO.write [function] [call site] 00169
2 bundle.capabilities.items [function] [call site] 00170
2 key.encode [function] [call site] 00171
2 sys.stdout.buffer.write [function] [call site] 00172
2 io.BytesIO.write [function] [call site] 00173
2 value.encode [function] [call site] 00174
2 sys.stdout.buffer.write [function] [call site] 00175
2 io.BytesIO.write [function] [call site] 00176
2 sys.stdout.buffer.write [function] [call site] 00177
2 io.BytesIO.write [function] [call site] 00178
2 sys.stdout.buffer.write [function] [call site] 00179
2 io.BytesIO.write [function] [call site] 00180
2 bundle.references.items [function] [call site] 00181
2 sys.stdout.buffer.write [function] [call site] 00182
2 io.BytesIO.write [function] [call site] 00183
2 sys.stdout.buffer.write [function] [call site] 00184
2 io.BytesIO.write [function] [call site] 00185
2 dulwich.pack.write_pack_data [function] [call site] 00186
2 <builtin>.len [function] [call site] 00187
2 dulwich.bundle.create_bundle_from_repo._BundlePackData.iter_unpacked [function] [call site] 00188
3 <builtin>.iter [function] [call site] 00189
1 dulwich.bundle.read_bundle [function] [call site] 00190
2 <builtin>.hasattr [function] [call site] 00191
2 sys.stdin.buffer.readline [function] [call site] 00192
2 io.BytesIO.readline [function] [call site] 00193
2 dulwich.bundle._read_bundle [function] [call site] 00194
3 sys.stdin.buffer.readline [function] [call site] 00195
3 io.BytesIO.readline [function] [call site] 00196
3 line.startswith [function] [call site] 00197
3 line.split [function] [call site] 00198
3 value_bytes.decode [function] [call site] 00199
3 key.decode [function] [call site] 00200
3 sys.stdin.buffer.readline [function] [call site] 00201
3 io.BytesIO.readline [function] [call site] 00202
3 line.startswith [function] [call site] 00203
3 prerequisites.append [function] [call site] 00204
3 sys.stdin.buffer.readline [function] [call site] 00205
3 io.BytesIO.readline [function] [call site] 00206
3 line.rstrip [function] [call site] 00207
3 sys.stdin.buffer.readline [function] [call site] 00208
3 io.BytesIO.readline [function] [call site] 00209
3 io.BytesIO.read [function] [call site] 00210
3 sys.stdin.buffer.read [function] [call site] 00211
3 io.BytesIO [function] [call site] 00212
3 dulwich.pack.PackData.from_file [function] [call site] 00213
2 dulwich.bundle._read_bundle [function] [call site] 00214
1 test_utils.is_expected_exception [function] [call site] 00215