Fuzz introspector: ZydisFuzzDecoder
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
2 2 1 :

['fputs']

2 2 ZydisFuzzerInit call site: 00000 /src/zydis/build/../tools/ZydisFuzzShared.c:528
0 7 1 :

['ZydisFormatterBufferAppendPredefined']

0 82 ZydisFormatterATTPrintMnemonic call site: 00000 /src/zydis/src/FormatterATT.c:285
0 0 None 12 40 ZydisFormatterATTFormatInstruction call site: 00000 /src/zydis/src/FormatterATT.c:85
0 0 None 12 40 ZydisFormatterATTFormatInstruction call site: 00000 /src/zydis/src/FormatterATT.c:116
0 0 None 12 40 ZydisFormatterATTFormatInstruction call site: 00000 /src/zydis/src/FormatterATT.c:126
0 0 None 12 12 ZydisFormatterIntelFormatInstruction call site: 00000 /src/zydis/src/FormatterIntel.c:85
0 0 None 12 12 ZydisFormatterIntelFormatInstruction call site: 00000 /src/zydis/src/FormatterIntel.c:116
0 0 None 12 12 ZydisFormatterIntelFormatInstruction call site: 00000 /src/zydis/src/FormatterIntel.c:126
0 0 None 0 817 ZydisDecoderDecodeInstruction call site: 00008 /src/zydis/src/Decoder.c:5031
0 0 None 0 45 ZydisFormatterBasePrintPrefixes call site: 00000 /src/zydis/src/FormatterBase.c:505
0 0 None 0 45 ZydisFormatterBasePrintPrefixes call site: 00000 /src/zydis/src/FormatterBase.c:520
0 0 None 0 0 ZydisDecodeInstruction call site: 00157 /src/zydis/src/Decoder.c:4816

Fuzzer calltree

0 LLVMFuzzerTestOneInput [function] [call site] 00000
1 ZydisFuzzTarget [function] [call site] 00001
2 ZydisDecoderInit [function] [call site] 00002
2 ZydisDecoderEnableMode [function] [call site] 00003
2 ZydisFormatterInit [function] [call site] 00004
2 ZydisFormatterSetProperty [function] [call site] 00005
3 strlen [call site] 00006
2 ZydisDecoderDecodeFull [function] [call site] 00007
3 ZydisDecoderDecodeInstruction [function] [call site] 00008
4 ZydisCollectOptionalPrefixes [function] [call site] 00009
5 __assert_fail [call site] 00010
5 ZydisInputPeek [function] [call site] 00011
6 __assert_fail [call site] 00012
5 __assert_fail [call site] 00013
5 ZydisInputSkip [function] [call site] 00014
6 __assert_fail [call site] 00015
5 ZydisDecodeREX [function] [call site] 00016
6 __assert_fail [call site] 00017
4 ZydisDecodeInstruction [function] [call site] 00018
5 __assert_fail [call site] 00019
5 ZydisNodeHandlerXOP [function] [call site] 00020
6 __assert_fail [call site] 00021
6 __assert_fail [call site] 00022
6 __assert_fail [call site] 00023
5 ZydisNodeHandlerVEX [function] [call site] 00024
6 __assert_fail [call site] 00025
6 __assert_fail [call site] 00026
6 __assert_fail [call site] 00027
5 ZydisNodeHandlerEMVEX [function] [call site] 00028
6 __assert_fail [call site] 00029
6 __assert_fail [call site] 00030
6 __assert_fail [call site] 00031
6 __assert_fail [call site] 00032
5 ZydisNodeHandlerOpcode [function] [call site] 00033
6 __assert_fail [call site] 00034
6 ZydisInputNext [function] [call site] 00035
7 __assert_fail [call site] 00036
6 ZydisInputPeek [function] [call site] 00037
6 __assert_fail [call site] 00038
6 ZydisInputNextBytes [function] [call site] 00039
7 __assert_fail [call site] 00040
6 __assert_fail [call site] 00041
6 ZydisInputNext [function] [call site] 00042
6 __assert_fail [call site] 00043
6 __assert_fail [call site] 00044
6 ZydisInputNextBytes [function] [call site] 00045
6 __assert_fail [call site] 00046
6 ZydisDecodeVEX [function] [call site] 00047
7 __assert_fail [call site] 00048
7 __assert_fail [call site] 00049
7 __assert_fail [call site] 00050
7 __assert_fail [call site] 00051
6 ZydisDecodeMVEX [function] [call site] 00052
7 __assert_fail [call site] 00053
7 __assert_fail [call site] 00054
7 __assert_fail [call site] 00055
6 ZydisDecodeEVEX [function] [call site] 00056
7 __assert_fail [call site] 00057
7 __assert_fail [call site] 00058
7 __assert_fail [call site] 00059
6 __assert_fail [call site] 00060
6 ZydisInputPeek [function] [call site] 00061
6 ZydisInputNextBytes [function] [call site] 00062
6 ZydisDecodeXOP [function] [call site] 00063
7 __assert_fail [call site] 00064
7 __assert_fail [call site] 00065
7 __assert_fail [call site] 00066
6 __assert_fail [call site] 00067
6 ZydisInputNext [function] [call site] 00068
5 ZydisNodeHandlerMode [function] [call site] 00069
6 __assert_fail [call site] 00070
6 __assert_fail [call site] 00071
5 ZydisNodeHandlerModeCompact [function] [call site] 00072
6 __assert_fail [call site] 00073
5 ZydisNodeHandlerModrmMod [function] [call site] 00074
6 __assert_fail [call site] 00075
6 ZydisInputNext [function] [call site] 00076
6 ZydisDecodeModRM [function] [call site] 00077
7 __assert_fail [call site] 00078
7 __assert_fail [call site] 00079
5 ZydisNodeHandlerModrmModCompact [function] [call site] 00080
6 ZydisNodeHandlerModrmMod [function] [call site] 00081
5 ZydisNodeHandlerModrmReg [function] [call site] 00082
6 __assert_fail [call site] 00083
6 ZydisInputNext [function] [call site] 00084
6 ZydisDecodeModRM [function] [call site] 00085
5 ZydisNodeHandlerModrmRm [function] [call site] 00086
6 __assert_fail [call site] 00087
6 ZydisInputNext [function] [call site] 00088
6 ZydisDecodeModRM [function] [call site] 00089
5 ZydisNodeHandlerMandatoryPrefix [function] [call site] 00090
6 __assert_fail [call site] 00091
5 ZydisDecoderTreeGetChildNode [function] [call site] 00092
6 __assert_fail [call site] 00093
6 __assert_fail [call site] 00094
6 __assert_fail [call site] 00095
6 __assert_fail [call site] 00096
6 __assert_fail [call site] 00097
6 __assert_fail [call site] 00098
6 __assert_fail [call site] 00099
6 __assert_fail [call site] 00100
6 __assert_fail [call site] 00101
6 __assert_fail [call site] 00102
6 __assert_fail [call site] 00103
6 __assert_fail [call site] 00104
6 __assert_fail [call site] 00105
6 __assert_fail [call site] 00106
6 __assert_fail [call site] 00107
6 __assert_fail [call site] 00108
6 __assert_fail [call site] 00109
6 __assert_fail [call site] 00110
6 __assert_fail [call site] 00111
6 __assert_fail [call site] 00112
6 __assert_fail [call site] 00113
6 __assert_fail [call site] 00114
6 __assert_fail [call site] 00115
6 __assert_fail [call site] 00116
6 __assert_fail [call site] 00117
6 __assert_fail [call site] 00118
6 __assert_fail [call site] 00119
6 __assert_fail [call site] 00120
6 __assert_fail [call site] 00121
6 __assert_fail [call site] 00122
5 ZydisNodeHandlerOperandSize [function] [call site] 00123
6 __assert_fail [call site] 00124
6 __assert_fail [call site] 00125
5 ZydisNodeHandlerAddressSize [function] [call site] 00126
6 __assert_fail [call site] 00127
6 __assert_fail [call site] 00128
5 ZydisNodeHandlerVectorLength [function] [call site] 00129
6 __assert_fail [call site] 00130
6 __assert_fail [call site] 00131
6 __assert_fail [call site] 00132
6 __assert_fail [call site] 00133
6 __assert_fail [call site] 00134
6 __assert_fail [call site] 00135
6 __assert_fail [call site] 00136
5 ZydisNodeHandlerRexW [function] [call site] 00137
6 __assert_fail [call site] 00138
6 __assert_fail [call site] 00139
6 __assert_fail [call site] 00140
6 __assert_fail [call site] 00141
6 __assert_fail [call site] 00142
6 __assert_fail [call site] 00143
6 __assert_fail [call site] 00144
5 ZydisNodeHandlerRexB [function] [call site] 00145
6 __assert_fail [call site] 00146
6 __assert_fail [call site] 00147
6 __assert_fail [call site] 00148
6 __assert_fail [call site] 00149
6 __assert_fail [call site] 00150
6 __assert_fail [call site] 00151
6 __assert_fail [call site] 00152
5 ZydisNodeHandlerEvexB [function] [call site] 00153
6 __assert_fail [call site] 00154
6 __assert_fail [call site] 00155
6 __assert_fail [call site] 00156
5 ZydisNodeHandlerMvexE [function] [call site] 00157
6 __assert_fail [call site] 00158
6 __assert_fail [call site] 00159
6 __assert_fail [call site] 00160
5 ZydisGetInstructionDefinition [function] [call site] 00161
6 __assert_fail [call site] 00162
5 ZydisSetEffectiveOperandWidth [function] [call site] 00163
6 __assert_fail [call site] 00164
6 __assert_fail [call site] 00165
5 ZydisSetEffectiveAddressWidth [function] [call site] 00166
6 __assert_fail [call site] 00167
6 __assert_fail [call site] 00168
5 ZydisGetInstructionEncodingInfo [function] [call site] 00169
6 __assert_fail [call site] 00170
6 __assert_fail [call site] 00171
5 ZydisDecodeOptionalInstructionParts [function] [call site] 00172
6 __assert_fail [call site] 00173
6 ZydisInputNext [function] [call site] 00174
6 ZydisDecodeModRM [function] [call site] 00175
6 __assert_fail [call site] 00176
6 __assert_fail [call site] 00177
6 __assert_fail [call site] 00178
6 ZydisInputNext [function] [call site] 00179
6 ZydisDecodeSIB [function] [call site] 00180
7 __assert_fail [call site] 00181
7 __assert_fail [call site] 00182
7 __assert_fail [call site] 00183
7 __assert_fail [call site] 00184
6 ZydisReadDisplacement [function] [call site] 00185
7 __assert_fail [call site] 00186
7 ZydisInputNext [function] [call site] 00187
7 ZydisInputNextBytes [function] [call site] 00188
7 ZydisInputNextBytes [function] [call site] 00189
7 ZydisInputNextBytes [function] [call site] 00190
7 __assert_fail [call site] 00191
6 ZydisReadDisplacement [function] [call site] 00192
6 ZydisReadImmediate [function] [call site] 00193
7 __assert_fail [call site] 00194
7 __assert_fail [call site] 00195
7 ZydisInputNext [function] [call site] 00196
7 ZydisInputNextBytes [function] [call site] 00197
7 ZydisInputNextBytes [function] [call site] 00198
7 ZydisInputNextBytes [function] [call site] 00199
7 __assert_fail [call site] 00200
6 __assert_fail [call site] 00201
6 ZydisReadImmediate [function] [call site] 00202
5 ZydisCheckErrorConditions [function] [call site] 00203
6 __assert_fail [call site] 00204
6 __assert_fail [call site] 00205
6 __assert_fail [call site] 00206
6 __assert_fail [call site] 00207
6 ZydisPopulateRegisterIds [function] [call site] 00208
7 __assert_fail [call site] 00209
7 __assert_fail [call site] 00210
6 __assert_fail [call site] 00211
6 __assert_fail [call site] 00212
6 __assert_fail [call site] 00213
6 __assert_fail [call site] 00214
6 __assert_fail [call site] 00215
6 __assert_fail [call site] 00216
6 __assert_fail [call site] 00217
5 ZydisInputNext [function] [call site] 00218
5 ZydisDecoderTreeGetChildNode [function] [call site] 00219
5 ZydisDecoderTreeGetChildNode [function] [call site] 00220
5 ZydisDecoderTreeGetChildNode [function] [call site] 00221
5 __assert_fail [call site] 00222
5 ZydisDecoderTreeGetChildNode [function] [call site] 00223
5 __assert_fail [call site] 00224
5 ZydisGetInstructionDefinition [function] [call site] 00225
5 __assert_fail [call site] 00226
5 ZydisSetAttributes [function] [call site] 00227
6 __assert_fail [call site] 00228
6 __assert_fail [call site] 00229
6 __assert_fail [call site] 00230
6 __assert_fail [call site] 00231
5 ZydisSetAVXInformation [function] [call site] 00232
6 __assert_fail [call site] 00233
6 __assert_fail [call site] 00234
6 __assert_fail [call site] 00235
6 __assert_fail [call site] 00236
6 __assert_fail [call site] 00237
6 __assert_fail [call site] 00238
6 __assert_fail [call site] 00239
6 __assert_fail [call site] 00240
6 __assert_fail [call site] 00241
6 __assert_fail [call site] 00242
6 __assert_fail [call site] 00243
6 __assert_fail [call site] 00244
6 __assert_fail [call site] 00245
6 __assert_fail [call site] 00246
6 __assert_fail [call site] 00247
6 __assert_fail [call site] 00248
6 __assert_fail [call site] 00249
6 __assert_fail [call site] 00250
6 __assert_fail [call site] 00251
6 __assert_fail [call site] 00252
6 __assert_fail [call site] 00253
6 __assert_fail [call site] 00254
6 __assert_fail [call site] 00255
6 __assert_fail [call site] 00256
6 __assert_fail [call site] 00257
6 __assert_fail [call site] 00258
6 __assert_fail [call site] 00259
6 __assert_fail [call site] 00260
6 __assert_fail [call site] 00261
6 __assert_fail [call site] 00262
6 __assert_fail [call site] 00263
6 __assert_fail [call site] 00264
6 __assert_fail [call site] 00265
6 __assert_fail [call site] 00266
6 __assert_fail [call site] 00267
6 __assert_fail [call site] 00268
6 __assert_fail [call site] 00269
6 __assert_fail [call site] 00270
6 __assert_fail [call site] 00271
6 __assert_fail [call site] 00272
6 __assert_fail [call site] 00273
6 __assert_fail [call site] 00274
6 __assert_fail [call site] 00275
6 __assert_fail [call site] 00276
6 __assert_fail [call site] 00277
6 __assert_fail [call site] 00278
6 __assert_fail [call site] 00279
6 __assert_fail [call site] 00280
6 __assert_fail [call site] 00281
6 __assert_fail [call site] 00282
6 __assert_fail [call site] 00283
6 __assert_fail [call site] 00284
6 __assert_fail [call site] 00285
6 __assert_fail [call site] 00286
6 __assert_fail [call site] 00287
6 __assert_fail [call site] 00288
6 __assert_fail [call site] 00289
6 __assert_fail [call site] 00290
6 __assert_fail [call site] 00291
6 __assert_fail [call site] 00292
5 ZydisGetAccessedFlags [function] [call site] 00293
6 __assert_fail [call site] 00294
5 __assert_fail [call site] 00295
5 ZydisDecoderTreeGetChildNode [function] [call site] 00296
3 ZydisDecoderDecodeOperands [function] [call site] 00297
4 ZydisDecodeOperands [function] [call site] 00298
5 __assert_fail [call site] 00299
5 __assert_fail [call site] 00300
5 __assert_fail [call site] 00301
5 ZydisGetOperandDefinitions [function] [call site] 00302
5 ZydisDecodeOperandImplicitRegister [function] [call site] 00303
6 __assert_fail [call site] 00304
6 __assert_fail [call site] 00305
6 ZydisRegisterEncode [function] [call site] 00306
6 ZydisRegisterEncode [function] [call site] 00307
6 ZydisRegisterEncode [function] [call site] 00308
6 __assert_fail [call site] 00309
5 ZydisDecodeOperandImplicitMemory [function] [call site] 00310
6 __assert_fail [call site] 00311
6 __assert_fail [call site] 00312
6 ZydisCalcRegisterId [function] [call site] 00313
7 __assert_fail [call site] 00314
6 ZydisRegisterEncode [function] [call site] 00315
6 ZydisCalcRegisterId [function] [call site] 00316
6 ZydisRegisterEncode [function] [call site] 00317
6 ZydisRegisterEncode [function] [call site] 00318
6 ZydisRegisterEncode [function] [call site] 00319
6 ZydisRegisterEncode [function] [call site] 00320
6 ZydisRegisterEncode [function] [call site] 00321
6 ZydisRegisterEncode [function] [call site] 00322
6 ZydisRegisterEncode [function] [call site] 00323
6 ZydisRegisterEncode [function] [call site] 00324
6 __assert_fail [call site] 00325
6 ZydisRegisterEncode [function] [call site] 00326
6 __assert_fail [call site] 00327
5 __assert_fail [call site] 00328
5 __assert_fail [call site] 00329
5 __assert_fail [call site] 00330
5 __assert_fail [call site] 00331
5 __assert_fail [call site] 00332
5 ZydisCalcRegisterId [function] [call site] 00333
5 ZydisDecodeOperandRegister [function] [call site] 00334
6 __assert_fail [call site] 00335
6 ZydisRegisterEncode [function] [call site] 00336
6 __assert_fail [call site] 00337
5 ZydisDecodeOperandMemory [function] [call site] 00338
6 __assert_fail [call site] 00339
6 __assert_fail [call site] 00340
6 __assert_fail [call site] 00341
6 __assert_fail [call site] 00342
6 __assert_fail [call site] 00343
6 ZydisCalcRegisterId [function] [call site] 00344
6 __assert_fail [call site] 00345
6 __assert_fail [call site] 00346
6 ZydisCalcRegisterId [function] [call site] 00347
6 ZydisRegisterEncode [function] [call site] 00348
6 ZydisCalcRegisterId [function] [call site] 00349
6 __assert_fail [call site] 00350
6 __assert_fail [call site] 00351
6 ZydisCalcRegisterId [function] [call site] 00352
6 ZydisRegisterEncode [function] [call site] 00353
6 __assert_fail [call site] 00354
6 __assert_fail [call site] 00355
5 ZydisDecodeOperandMemory [function] [call site] 00356
5 ZydisDecodeOperandMemory [function] [call site] 00357
5 ZydisDecodeOperandMemory [function] [call site] 00358
5 __assert_fail [call site] 00359
5 __assert_fail [call site] 00360
5 ZydisDecodeOperandMemory [function] [call site] 00361
5 __assert_fail [call site] 00362
5 ZydisDecodeOperandMemory [function] [call site] 00363
5 __assert_fail [call site] 00364
5 __assert_fail [call site] 00365
5 __assert_fail [call site] 00366
5 __assert_fail [call site] 00367
5 ZydisSetOperandSizeAndElementInfo [function] [call site] 00368
6 __assert_fail [call site] 00369
6 __assert_fail [call site] 00370
6 ZydisRegisterGetWidth [function] [call site] 00371
6 __assert_fail [call site] 00372
6 __assert_fail [call site] 00373
6 __assert_fail [call site] 00374
6 __assert_fail [call site] 00375
6 __assert_fail [call site] 00376
6 __assert_fail [call site] 00377
6 __assert_fail [call site] 00378
6 __assert_fail [call site] 00379
6 __assert_fail [call site] 00380
6 __assert_fail [call site] 00381
6 __assert_fail [call site] 00382
6 __assert_fail [call site] 00383
6 __assert_fail [call site] 00384
6 __assert_fail [call site] 00385
6 __assert_fail [call site] 00386
6 ZydisGetElementInfo [function] [call site] 00387
7 __assert_fail [call site] 00388
2 ZydisValidateEnumRanges [function] [call site] 00389
3 fprintf [call site] 00390
3 abort [call site] 00391
3 fprintf [call site] 00392
3 abort [call site] 00393
3 fprintf [call site] 00394
3 abort [call site] 00395
3 fprintf [call site] 00396
3 abort [call site] 00397
3 fprintf [call site] 00398
3 abort [call site] 00399
3 fprintf [call site] 00400
3 abort [call site] 00401
3 fprintf [call site] 00402
3 abort [call site] 00403
3 fprintf [call site] 00404
3 abort [call site] 00405
3 fprintf [call site] 00406
3 abort [call site] 00407
3 fprintf [call site] 00408
3 abort [call site] 00409
3 fprintf [call site] 00410
3 abort [call site] 00411
3 fprintf [call site] 00412
3 abort [call site] 00413
3 fprintf [call site] 00414
3 abort [call site] 00415
3 fprintf [call site] 00416
3 abort [call site] 00417
3 fprintf [call site] 00418
3 abort [call site] 00419
3 ZydisValidateImmediateSize [function] [call site] 00420
4 fprintf [call site] 00421
4 abort [call site] 00422
3 fprintf [call site] 00423
3 abort [call site] 00424
3 fprintf [call site] 00425
3 abort [call site] 00426
3 fprintf [call site] 00427
3 abort [call site] 00428
3 ZydisValidateImmediateSize [function] [call site] 00429
3 fprintf [call site] 00430
3 abort [call site] 00431
3 fprintf [call site] 00432
3 abort [call site] 00433
3 fprintf [call site] 00434
3 abort [call site] 00435
3 fprintf [call site] 00436
3 abort [call site] 00437
3 fprintf [call site] 00438
3 abort [call site] 00439
3 fprintf [call site] 00440
3 abort [call site] 00441
3 fprintf [call site] 00442
3 abort [call site] 00443
3 fprintf [call site] 00444
3 abort [call site] 00445
3 fprintf [call site] 00446
3 abort [call site] 00447
3 fprintf [call site] 00448
3 abort [call site] 00449
3 fprintf [call site] 00450
3 abort [call site] 00451
3 fprintf [call site] 00452
3 abort [call site] 00453
3 fprintf [call site] 00454
3 abort [call site] 00455
3 fprintf [call site] 00456
3 abort [call site] 00457
3 fprintf [call site] 00458
3 abort [call site] 00459
3 fprintf [call site] 00460
3 abort [call site] 00461
3 fprintf [call site] 00462
3 abort [call site] 00463
3 fprintf [call site] 00464
3 abort [call site] 00465
2 ZydisFormatterFormatInstruction [function] [call site] 00466
3 ZydisFormatterBufferInit [function] [call site] 00467
4 __assert_fail [call site] 00468
2 ZydisFormatterTokenizeInstruction [function] [call site] 00469
3 ZydisFormatterBufferInitTokenized [function] [call site] 00470
4 __assert_fail [call site] 00471
2 ZydisFormatterTokenGetValue [function] [call site] 00472
2 ZydisFormatterTokenNext [function] [call site] 00473
2 ZydisFormatterFormatOperand [function] [call site] 00474
3 ZydisFormatterBufferInit [function] [call site] 00475
2 ZydisFormatterTokenizeOperand [function] [call site] 00476
3 ZydisFormatterBufferInitTokenized [function] [call site] 00477
2 ZydisCalcAbsoluteAddress [function] [call site] 00478
2 ZydisMnemonicGetString [function] [call site] 00479
2 ZydisMnemonicGetStringWrapped [function] [call site] 00480
2 ZydisGetInstructionSegments [function] [call site] 00481
3 __assert_fail [call site] 00482
2 ZydisIsFeatureEnabled [function] [call site] 00483
2 ZydisRegisterEncode [function] [call site] 00484
2 ZydisRegisterGetId [function] [call site] 00485
2 ZydisRegisterGetClass [function] [call site] 00486
2 ZydisRegisterGetWidth [function] [call site] 00487
2 ZydisRegisterGetLargestEnclosing [function] [call site] 00488
3 __assert_fail [call site] 00489
2 ZydisRegisterGetString [function] [call site] 00490
2 ZydisRegisterGetStringWrapped [function] [call site] 00491
2 ZydisRegisterClassGetWidth [function] [call site] 00492
1 ZydisLibFuzzerRead [function] [call site] 00493