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

Fuzz blockers

The followings are the branches where fuzzer fails to bypass.

Unique non-covered Complexity Unique Reachable Complexities Unique Reachable Functions All non-covered Complexity All Reachable Complexity Function Name Function Callsite Blocked Branch
0 0 None 0 9 FUZZ_dataProducer_int32Range call site: 00005 /src/zstd/tests/fuzz/fuzz_data_producer.c:60
0 0 None 0 0 HUF_DEltX1_set4 call site: 00107 /src/zstd/lib/decompress/huf_decompress.c:337
0 0 None 0 0 HUF_buildDEltX2U32 call site: 00129 /src/zstd/lib/decompress/huf_decompress.c:968
0 0 None 0 0 HUF_decompress4X2_usingDTable_internal_fast call site: 00247 /src/zstd/lib/decompress/huf_decompress.c:1710
0 0 None 0 0 HUF_DecompressFastArgs_init call site: 00220 /src/zstd/lib/decompress/huf_decompress.c:203
0 0 None 0 0 HUF_initRemainingDStream call site: 00243 /src/zstd/lib/decompress/huf_decompress.c:284
0 0 None 0 0 FUZZ_dataProducer_uint32Range call site: 00007 /src/zstd/tests/fuzz/fuzz_data_producer.c:44

Fuzzer calltree

0 LLVMFuzzerTestOneInput [function] [call site] 00000
1 FUZZ_dataProducer_create [function] [call site] 00001
2 FUZZ_malloc [function] [call site] 00002
3 fprintf [call site] 00003
1 FUZZ_dataProducer_int32Range [function] [call site] 00004
2 fprintf [call site] 00005
2 FUZZ_dataProducer_uint32Range [function] [call site] 00006
3 fprintf [call site] 00007
2 FUZZ_dataProducer_uint32Range [function] [call site] 00008
1 FUZZ_dataProducer_int32Range [function] [call site] 00009
1 ZSTD_cpuid [function] [call site] 00010
1 FUZZ_dataProducer_int32Range [function] [call site] 00011
1 FUZZ_dataProducer_int32Range [function] [call site] 00012
1 FUZZ_dataProducer_int32Range [function] [call site] 00013
1 FUZZ_dataProducer_int32Range [function] [call site] 00014
1 FUZZ_dataProducer_int32Range [function] [call site] 00015
1 FUZZ_dataProducer_int32Range [function] [call site] 00016
1 FUZZ_dataProducer_uint32Range [function] [call site] 00017
1 FUZZ_dataProducer_uint32Range [function] [call site] 00018
1 FUZZ_malloc [function] [call site] 00019
1 FUZZ_malloc [function] [call site] 00020
1 FUZZ_malloc [function] [call site] 00021
1 FUZZ_dataProducer_remainingBytes [function] [call site] 00022
1 HUF_readDTableX1_wksp [function] [call site] 00023
2 HUF_readStats_wksp [function] [call site] 00024
3 HUF_readStats_body_bmi2 [function] [call site] 00025
4 FSE_decompress_wksp_bmi2 [function] [call site] 00026
5 FSE_decompress_wksp_body_bmi2 [function] [call site] 00027
6 FSE_readNCount_bmi2 [function] [call site] 00028
7 FSE_readNCount_body_bmi2 [function] [call site] 00029
8 FSE_readNCount [function] [call site] 00030
9 FSE_readNCount_bmi2 [function] [call site] 00031
10 FSE_readNCount_body_default [function] [call site] 00032
11 FSE_readNCount [function] [call site] 00033
11 MEM_readLE32 [function] [call site] 00034
12 MEM_isLittleEndian [function] [call site] 00035
12 MEM_read32 [function] [call site] 00036
12 MEM_read32 [function] [call site] 00037
11 __assert_fail [call site] 00038
11 ZSTD_countTrailingZeros32 [function] [call site] 00039
12 __assert_fail [call site] 00040
8 MEM_readLE32 [function] [call site] 00041
8 __assert_fail [call site] 00042
8 ZSTD_countTrailingZeros32 [function] [call site] 00043
6 ERR_isError [function] [call site] 00044
6 __assert_fail [call site] 00045
6 FSE_buildDTable_internal [function] [call site] 00046
7 MEM_write64 [function] [call site] 00047
7 MEM_write64 [function] [call site] 00048
7 __assert_fail [call site] 00049
7 __assert_fail [call site] 00050
7 ZSTD_highbit32 [function] [call site] 00051
8 __assert_fail [call site] 00052
8 ZSTD_countLeadingZeros32 [function] [call site] 00053
9 __assert_fail [call site] 00054
6 BIT_initDStream [function] [call site] 00055
7 MEM_readLEST [function] [call site] 00056
8 MEM_32bits [function] [call site] 00057
8 MEM_readLE32 [function] [call site] 00058
8 MEM_readLE64 [function] [call site] 00059
9 MEM_isLittleEndian [function] [call site] 00060
9 MEM_read64 [function] [call site] 00061
9 MEM_read64 [function] [call site] 00062
7 ZSTD_highbit32 [function] [call site] 00063
7 ZSTD_highbit32 [function] [call site] 00064
6 ERR_isError [function] [call site] 00065
6 FSE_initDState [function] [call site] 00066
7 __assert_fail [call site] 00067
7 __assert_fail [call site] 00068
7 BIT_reloadDStream_internal [function] [call site] 00069
8 __assert_fail [call site] 00070
8 __assert_fail [call site] 00071
8 MEM_readLEST [function] [call site] 00072
7 MEM_readLEST [function] [call site] 00073
6 __assert_fail [call site] 00074
6 BIT_reloadDStream_internal [function] [call site] 00075
6 MEM_readLEST [function] [call site] 00076
6 __assert_fail [call site] 00077
6 BIT_reloadDStream_internal [function] [call site] 00078
6 MEM_readLEST [function] [call site] 00079
6 __assert_fail [call site] 00080
6 BIT_reloadDStream_internal [function] [call site] 00081
6 MEM_readLEST [function] [call site] 00082
6 __assert_fail [call site] 00083
6 BIT_reloadDStream_internal [function] [call site] 00084
6 MEM_readLEST [function] [call site] 00085
6 __assert_fail [call site] 00086
6 BIT_initDStream [function] [call site] 00087
6 ERR_isError [function] [call site] 00088
6 FSE_initDState [function] [call site] 00089
6 __assert_fail [call site] 00090
5 FSE_decompress_wksp_body_default [function] [call site] 00091
6 FSE_readNCount_bmi2 [function] [call site] 00092
6 ERR_isError [function] [call site] 00093
6 __assert_fail [call site] 00094
6 FSE_buildDTable_internal [function] [call site] 00095
4 FSE_isError [function] [call site] 00096
5 ERR_isError [function] [call site] 00097
4 ZSTD_highbit32 [function] [call site] 00098
3 HUF_readStats_body_default [function] [call site] 00099
4 FSE_decompress_wksp_bmi2 [function] [call site] 00100
4 FSE_isError [function] [call site] 00101
4 ZSTD_highbit32 [function] [call site] 00102
2 ERR_isError [function] [call site] 00103
2 HUF_getDTableDesc [function] [call site] 00104
2 HUF_rescaleStats [function] [call site] 00105
2 HUF_DEltX1_set4 [function] [call site] 00106
3 MEM_isLittleEndian [function] [call site] 00107
3 __assert_fail [call site] 00108
2 MEM_write64 [function] [call site] 00109
2 HUF_DEltX1_set4 [function] [call site] 00110
2 MEM_write64 [function] [call site] 00111
2 MEM_write64 [function] [call site] 00112
2 HUF_DEltX1_set4 [function] [call site] 00113
2 MEM_write64 [function] [call site] 00114
2 MEM_write64 [function] [call site] 00115
2 MEM_write64 [function] [call site] 00116
2 MEM_write64 [function] [call site] 00117
2 __assert_fail [call site] 00118
1 ZSTD_isError [function] [call site] 00119
2 ERR_isError [function] [call site] 00120
1 HUF_readDTableX2_wksp [function] [call site] 00121
2 HUF_getDTableDesc [function] [call site] 00122
2 HUF_readStats_wksp [function] [call site] 00123
2 ERR_isError [function] [call site] 00124
2 HUF_fillDTableX2 [function] [call site] 00125
3 HUF_fillDTableX2Level2 [function] [call site] 00126
4 HUF_buildDEltX2U64 [function] [call site] 00127
5 HUF_buildDEltX2U32 [function] [call site] 00128
6 MEM_isLittleEndian [function] [call site] 00129
4 __assert_fail [call site] 00130
4 __assert_fail [call site] 00131
4 __assert_fail [call site] 00132
4 __assert_fail [call site] 00133
4 HUF_fillDTableX2ForWeight [function] [call site] 00134
5 __assert_fail [call site] 00135
5 HUF_buildDEltX2 [function] [call site] 00136
6 HUF_buildDEltX2U32 [function] [call site] 00137
5 HUF_buildDEltX2 [function] [call site] 00138
5 HUF_buildDEltX2U64 [function] [call site] 00139
5 HUF_buildDEltX2U64 [function] [call site] 00140
5 HUF_buildDEltX2U64 [function] [call site] 00141
3 HUF_fillDTableX2ForWeight [function] [call site] 00142
1 ZSTD_isError [function] [call site] 00143
1 HUF_decompress1X_usingDTable [function] [call site] 00144
2 HUF_getDTableDesc [function] [call site] 00145
2 HUF_decompress1X2_usingDTable_internal [function] [call site] 00146
3 HUF_decompress1X2_usingDTable_internal_bmi2 [function] [call site] 00147
4 BIT_initDStream [function] [call site] 00148
5 MEM_readLEST [function] [call site] 00149
6 MEM_32bits [function] [call site] 00150
6 MEM_readLE32 [function] [call site] 00151
7 MEM_isLittleEndian [function] [call site] 00152
7 MEM_read32 [function] [call site] 00153
7 MEM_read32 [function] [call site] 00154
6 MEM_readLE64 [function] [call site] 00155
7 MEM_isLittleEndian [function] [call site] 00156
7 MEM_read64 [function] [call site] 00157
7 MEM_read64 [function] [call site] 00158
5 ZSTD_highbit32 [function] [call site] 00159
6 ZSTD_countLeadingZeros32 [function] [call site] 00160
5 ZSTD_highbit32 [function] [call site] 00161
4 ERR_isError [function] [call site] 00162
4 ZSTD_maybeNullPtrAdd [function] [call site] 00163
4 MEM_64bits [function] [call site] 00164
4 __assert_fail [call site] 00165
4 BIT_reloadDStream_internal [function] [call site] 00166
5 MEM_readLEST [function] [call site] 00167
4 MEM_readLEST [function] [call site] 00168
4 BIT_lookBitsFast [function] [call site] 00169
5 __assert_fail [call site] 00170
4 BIT_lookBitsFast [function] [call site] 00171
4 BIT_lookBitsFast [function] [call site] 00172
4 BIT_lookBitsFast [function] [call site] 00173
4 BIT_lookBitsFast [function] [call site] 00174
4 __assert_fail [call site] 00175
4 BIT_reloadDStream_internal [function] [call site] 00176
4 MEM_readLEST [function] [call site] 00177
4 BIT_lookBitsFast [function] [call site] 00178
4 BIT_lookBitsFast [function] [call site] 00179
4 BIT_lookBitsFast [function] [call site] 00180
4 BIT_lookBitsFast [function] [call site] 00181
4 __assert_fail [call site] 00182
4 BIT_reloadDStream_internal [function] [call site] 00183
4 MEM_readLEST [function] [call site] 00184
4 __assert_fail [call site] 00185
4 BIT_reloadDStream_internal [function] [call site] 00186
4 MEM_readLEST [function] [call site] 00187
4 BIT_lookBitsFast [function] [call site] 00188
4 BIT_lookBitsFast [function] [call site] 00189
4 BIT_lookBitsFast [function] [call site] 00190
2 HUF_decompress1X1_usingDTable_internal [function] [call site] 00191
3 HUF_decompress1X1_usingDTable_internal_bmi2 [function] [call site] 00192
4 ZSTD_maybeNullPtrAdd [function] [call site] 00193
4 BIT_initDStream [function] [call site] 00194
4 ERR_isError [function] [call site] 00195
4 __assert_fail [call site] 00196
4 BIT_reloadDStream_internal [function] [call site] 00197
4 MEM_readLEST [function] [call site] 00198
4 MEM_64bits [function] [call site] 00199
4 BIT_lookBitsFast [function] [call site] 00200
4 BIT_lookBitsFast [function] [call site] 00201
4 BIT_lookBitsFast [function] [call site] 00202
4 BIT_lookBitsFast [function] [call site] 00203
4 __assert_fail [call site] 00204
4 BIT_reloadDStream_internal [function] [call site] 00205
4 MEM_readLEST [function] [call site] 00206
4 __assert_fail [call site] 00207
4 BIT_reloadDStream_internal [function] [call site] 00208
4 MEM_readLEST [function] [call site] 00209
4 BIT_lookBitsFast [function] [call site] 00210
4 BIT_lookBitsFast [function] [call site] 00211
1 HUF_decompress4X_usingDTable [function] [call site] 00212
2 HUF_getDTableDesc [function] [call site] 00213
2 HUF_decompress4X2_usingDTable_internal [function] [call site] 00214
3 HUF_decompress4X2_usingDTable_internal_fast [function] [call site] 00215
4 ZSTD_maybeNullPtrAdd [function] [call site] 00216
4 HUF_DecompressFastArgs_init [function] [call site] 00217
5 HUF_getDTableDesc [function] [call site] 00218
5 ZSTD_maybeNullPtrAdd [function] [call site] 00219
5 MEM_isLittleEndian [function] [call site] 00220
5 __assert_fail [call site] 00221
5 MEM_readLE16 [function] [call site] 00222
6 MEM_isLittleEndian [function] [call site] 00223
6 MEM_read16 [function] [call site] 00224
5 MEM_readLE16 [function] [call site] 00225
5 MEM_readLE16 [function] [call site] 00226
5 HUF_initFastDStream [function] [call site] 00227
6 ZSTD_highbit32 [function] [call site] 00228
6 MEM_readLEST [function] [call site] 00229
6 __assert_fail [call site] 00230
5 HUF_initFastDStream [function] [call site] 00231
5 HUF_initFastDStream [function] [call site] 00232
5 HUF_initFastDStream [function] [call site] 00233
4 ERR_isError [function] [call site] 00234
4 __assert_fail [call site] 00235
4 __assert_fail [call site] 00236
4 __assert_fail [call site] 00237
4 __assert_fail [call site] 00238
4 __assert_fail [call site] 00239
4 __assert_fail [call site] 00240
4 __assert_fail [call site] 00241
4 __assert_fail [call site] 00242
4 HUF_initRemainingDStream [function] [call site] 00243
5 ZSTD_countTrailingZeros64 [function] [call site] 00244
6 __assert_fail [call site] 00245
4 ERR_isError [function] [call site] 00246
4 MEM_64bits [function] [call site] 00247
2 HUF_decompress4X1_usingDTable_internal [function] [call site] 00248
3 HUF_decompress4X1_usingDTable_internal_fast [function] [call site] 00249
4 ZSTD_maybeNullPtrAdd [function] [call site] 00250
4 HUF_DecompressFastArgs_init [function] [call site] 00251
4 ERR_isError [function] [call site] 00252
4 __assert_fail [call site] 00253
4 __assert_fail [call site] 00254
4 __assert_fail [call site] 00255
4 __assert_fail [call site] 00256
4 __assert_fail [call site] 00257
4 __assert_fail [call site] 00258
4 __assert_fail [call site] 00259
4 __assert_fail [call site] 00260
4 __assert_fail [call site] 00261
4 HUF_initRemainingDStream [function] [call site] 00262
4 ERR_isError [function] [call site] 00263
4 MEM_64bits [function] [call site] 00264
4 __assert_fail [call site] 00265
1 FUZZ_dataProducer_free [function] [call site] 00266