Fuzz introspector: dns_master_load_fuzzer
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
126 143 isc_log_doit call site: 00143 isc_log_open
16 45 isc_mem_inuse call site: 00045 write_errno
15 27 mem_create call site: 00027 total_inuse
7 400 mem_purge call site: 00400 isc_stdio_close
4 79 isc_rwlock_rdlock call site: 00079 read_indicator_depart
4 276 isc_log_doit call site: 00276 isc_assertion_failed
3 139 isc_time_formatISO8601TZms call site: 00139 snprintf
3 343 isc_stdtime_now call site: 00343 isc_string_strerror_r
3 381 dns_master_loadbuffer call site: 00381 dns_loadctx_unref
3 473 call_updatenotify call site: 00473 urcu_memb_read_unlock
3 477 LLVMFuzzerTestOneInput call site: 00477 dns_db_unref
2 87 isc_rwlock_rdunlock call site: 00087 isc_log_write

Fuzzer calltree

0 LLVMFuzzerTestOneInput [function] [call site] 00000
1 isc_buffer_init [function] [call site] 00001
2 isc_assertion_failed [function] [call site] 00002
3 abort [call site] 00003
1 isc_buffer_add [function] [call site] 00004
2 isc_assertion_failed [function] [call site] 00005
2 isc_assertion_failed [function] [call site] 00006
1 isc_buffer_setactive [function] [call site] 00007
2 isc_assertion_failed [function] [call site] 00008
2 isc_assertion_failed [function] [call site] 00009
1 dns_rdatacallbacks_init [function] [call site] 00010
2 dns_rdatacallbacks_initcommon [function] [call site] 00011
3 isc_assertion_failed [function] [call site] 00012
1 isc__mem_create [function] [call site] 00013
2 mem_create [function] [call site] 00014
3 isc_assertion_failed [function] [call site] 00015
3 isc_assertion_failed [function] [call site] 00016
3 isc_os_cacheline [function] [call site] 00017
3 ffs [call site] 00018
3 mallocx [function] [call site] 00019
4 get_header_size [function] [call site] 00020
5 get_aligned_size [function] [call site] 00021
6 isc_assertion_failed [function] [call site] 00022
4 get_aligned_size [function] [call site] 00023
4 isc_assertion_failed [function] [call site] 00024
4 aligned_alloc [call site] 00025
4 isc_assertion_failed [function] [call site] 00026
3 oom [function] [call site] 00027
4 fileno [call site] 00028
4 write_string [function] [call site] 00029
5 strlen [call site] 00030
5 write [call site] 00031
5 abort [call site] 00032
4 write_size [function] [call site] 00033
5 write_string [function] [call site] 00034
4 write_string [function] [call site] 00035
4 total_inuse [function] [call site] 00036
5 pthread_mutex_lock [call site] 00037
5 isc_string_strerror_r [function] [call site] 00038
6 __xpg_strerror_r [call site] 00039
5 isc_error_fatal [function] [call site] 00040
6 abort [call site] 00041
5 isc_mem_inuse [function] [call site] 00042
6 isc_assertion_failed [function] [call site] 00043
6 isc_tid_count [function] [call site] 00044
6 isc_assertion_failed [function] [call site] 00045
5 pthread_mutex_unlock [call site] 00046
5 isc_string_strerror_r [function] [call site] 00047
5 isc_error_fatal [function] [call site] 00048
4 write_size [function] [call site] 00049
4 write_string [function] [call site] 00050
4 __errno_location [call site] 00051
4 write_errno [function] [call site] 00052
5 isc_string_strerror_r [function] [call site] 00053
5 write_string [function] [call site] 00054
4 write_string [function] [call site] 00055
4 write_backtrace [function] [call site] 00056
5 isc_backtrace [function] [call site] 00057
6 backtrace [call site] 00058
5 isc_backtrace_symbols_fd [function] [call site] 00059
6 backtrace_symbols_fd [call site] 00060
4 abort [call site] 00061
3 strdup [call site] 00062
3 pthread_mutex_init [call site] 00063
3 isc_string_strerror_r [function] [call site] 00064
3 isc_error_fatal [function] [call site] 00065
3 pthread_mutex_lock [call site] 00066
3 isc_string_strerror_r [function] [call site] 00067
3 isc_error_fatal [function] [call site] 00068
3 pthread_mutex_unlock [call site] 00069
3 isc_string_strerror_r [function] [call site] 00070
3 isc_error_fatal [function] [call site] 00071
1 dns_db_create [function] [call site] 00072
2 isc_assertion_failed [function] [call site] 00073
2 dns_name_isabsolute [function] [call site] 00074
3 isc_assertion_failed [function] [call site] 00075
2 isc_assertion_failed [function] [call site] 00076
2 isc_rwlock_rdlock [function] [call site] 00077
3 read_indicator_arrive [function] [call site] 00078
3 writers_lock_islocked [function] [call site] 00079
3 read_indicator_depart [function] [call site] 00080
3 writers_lock_islocked [function] [call site] 00081
3 writers_barrier_raise [function] [call site] 00082
3 writers_barrier_lower [function] [call site] 00083
2 impfind [function] [call site] 00084
3 strcasecmp [call site] 00085
2 isc_rwlock_rdunlock [function] [call site] 00086
3 read_indicator_depart [function] [call site] 00087
2 isc_rwlock_rdunlock [function] [call site] 00088
2 isc_log_write [function] [call site] 00089
3 isc_log_doit [function] [call site] 00090
4 isc_assertion_failed [function] [call site] 00091
4 isc_assertion_failed [function] [call site] 00092
4 isc_assertion_failed [function] [call site] 00093
4 isc_assertion_failed [function] [call site] 00094
4 isc_assertion_failed [function] [call site] 00095
4 isc_log_wouldlog [function] [call site] 00096
4 urcu_memb_read_lock [call site] 00097
4 pthread_mutex_lock [call site] 00098
4 isc_string_strerror_r [function] [call site] 00099
4 isc_error_fatal [function] [call site] 00100
4 rcu_dereference_sym [call site] 00101
4 isc_time_now [function] [call site] 00102
5 time_now [function] [call site] 00103
6 clock_gettime [call site] 00104
6 isc_error_fatal [function] [call site] 00105
6 isc_assertion_failed [function] [call site] 00106
6 isc_assertion_failed [function] [call site] 00107
4 isc_time_formattimestamp [function] [call site] 00108
5 isc_assertion_failed [function] [call site] 00109
5 isc_assertion_failed [function] [call site] 00110
5 isc_assertion_failed [function] [call site] 00111
5 localtime_r [call site] 00112
5 strftime [call site] 00113
5 strlcpy [call site] 00114
5 snprintf [call site] 00115
4 isc_time_formatISO8601ms [function] [call site] 00116
5 isc_assertion_failed [function] [call site] 00117
5 isc_assertion_failed [function] [call site] 00118
5 isc_assertion_failed [function] [call site] 00119
5 gmtime_r [call site] 00120
5 strftime [call site] 00121
5 strlcpy [call site] 00122
5 snprintf [call site] 00123
4 isc_time_formatISO8601Lms [function] [call site] 00124
5 isc_assertion_failed [function] [call site] 00125
5 isc_assertion_failed [function] [call site] 00126
5 isc_assertion_failed [function] [call site] 00127
5 localtime_r [call site] 00128
5 strftime [call site] 00129
5 strlcpy [call site] 00130
5 snprintf [call site] 00131
4 isc_time_formatISO8601TZms [function] [call site] 00132
5 isc_assertion_failed [function] [call site] 00133
5 isc_assertion_failed [function] [call site] 00134
5 isc_assertion_failed [function] [call site] 00135
5 localtime_r [call site] 00136
5 strftime [call site] 00137
5 snprintf [call site] 00138
5 isc_assertion_failed [function] [call site] 00139
4 snprintf [call site] 00140
4 snprintf [call site] 00141
4 snprintf [call site] 00142
4 vsnprintf [call site] 00143
4 stat64 [call site] 00144
4 __errno_location [call site] 00145
4 fclose [call site] 00146
4 isc_log_open [function] [call site] 00147
5 isc_assertion_failed [function] [call site] 00148
5 isc_assertion_failed [function] [call site] 00149
5 isc_assertion_failed [function] [call site] 00150
5 stat64 [call site] 00151
5 __errno_location [call site] 00152
5 isc_logfile_roll [function] [call site] 00153
6 isc_assertion_failed [function] [call site] 00154
6 isc_file_remove [function] [call site] 00155
7 isc_assertion_failed [function] [call site] 00156
7 unlink [call site] 00157
7 __errno_location [call site] 00158
7 isc___errno2result [function] [call site] 00159
8 isc_string_strerror_r [function] [call site] 00160
8 isc_error_unexpected [function] [call site] 00161
6 isc_result_totext [function] [call site] 00162
6 syslog [call site] 00163
6 roll_increment [function] [call site] 00164
7 isc_assertion_failed [function] [call site] 00165
7 isc_assertion_failed [function] [call site] 00166
7 snprintf [call site] 00167
7 isc_file_exists [function] [call site] 00168
8 isc_assertion_failed [function] [call site] 00169
8 file_stats [function] [call site] 00170
9 isc_assertion_failed [function] [call site] 00171
9 isc_assertion_failed [function] [call site] 00172
9 stat64 [call site] 00173
9 __errno_location [call site] 00174
9 isc___errno2result [function] [call site] 00175
7 greatest_version [function] [call site] 00176
8 strrchr [call site] 00177
8 strlcpy [call site] 00178
8 isc_result_totext [function] [call site] 00179
8 syslog [call site] 00180
8 strlen [call site] 00181
8 isc_dir_init [function] [call site] 00182
9 isc_assertion_failed [function] [call site] 00183
8 isc_dir_open [function] [call site] 00184
9 isc_assertion_failed [function] [call site] 00185
9 isc_assertion_failed [function] [call site] 00186
9 strlen [call site] 00187
9 strlcpy [call site] 00188
9 strlen [call site] 00189
9 opendir [call site] 00190
9 __errno_location [call site] 00191
9 isc___errno2result [function] [call site] 00192
8 isc_dir_read [function] [call site] 00193
9 isc_assertion_failed [function] [call site] 00194
9 readdir64 [call site] 00195
9 strlen [call site] 00196
9 strlcpy [call site] 00197
9 strlen [call site] 00198
8 strncmp [call site] 00199
8 __isoc23_strtol [call site] 00200
8 dirfd [call site] 00201
8 unlinkat [call site] 00202
8 __errno_location [call site] 00203
8 isc_errno_toresult [function] [call site] 00204
9 isc___errno2result [function] [call site] 00205
8 isc_result_totext [function] [call site] 00206
8 syslog [call site] 00207
8 isc_dir_close [function] [call site] 00208
9 isc_assertion_failed [function] [call site] 00209
9 closedir [call site] 00210
7 snprintf [call site] 00211
7 snprintf [call site] 00212
7 isc_file_rename [function] [call site] 00213
8 isc_assertion_failed [function] [call site] 00214
8 isc_assertion_failed [function] [call site] 00215
8 rename [call site] 00216
8 __errno_location [call site] 00217
8 isc___errno2result [function] [call site] 00218
7 isc_result_totext [function] [call site] 00219
7 syslog [call site] 00220
7 snprintf [call site] 00221
7 isc_file_rename [function] [call site] 00222
7 isc_result_totext [function] [call site] 00223
7 syslog [call site] 00224
6 roll_timestamp [function] [call site] 00225
7 isc_assertion_failed [function] [call site] 00226
7 isc_assertion_failed [function] [call site] 00227
7 remove_old_tsversions [function] [call site] 00228
8 strrchr [call site] 00229
8 strlcpy [call site] 00230
8 isc_result_totext [function] [call site] 00231
8 syslog [call site] 00232
8 strlen [call site] 00233
8 isc_dir_init [function] [call site] 00234
8 isc_dir_open [function] [call site] 00235
8 last_to_keep [function] [call site] 00236
9 isc_dir_read [function] [call site] 00237
9 strncmp [call site] 00238
9 __isoc23_strtoull [call site] 00239
9 insert_sort [function] [call site] 00240
9 isc_dir_reset [function] [call site] 00241
10 isc_assertion_failed [function] [call site] 00242
10 rewinddir [call site] 00243
8 isc_dir_read [function] [call site] 00244
8 strncmp [call site] 00245
8 __isoc23_strtoull [call site] 00246
8 dirfd [call site] 00247
8 unlinkat [call site] 00248
8 __errno_location [call site] 00249
8 isc_errno_toresult [function] [call site] 00250
8 isc_result_totext [function] [call site] 00251
8 syslog [call site] 00252
8 isc_dir_close [function] [call site] 00253
7 isc_time_now [function] [call site] 00254
7 isc_time_formatshorttimestamp [function] [call site] 00255
8 isc_assertion_failed [function] [call site] 00256
8 isc_assertion_failed [function] [call site] 00257
8 isc_assertion_failed [function] [call site] 00258
8 gmtime_r [call site] 00259
8 strftime [call site] 00260
8 strlcpy [call site] 00261
8 snprintf [call site] 00262
7 snprintf [call site] 00263
7 isc_file_rename [function] [call site] 00264
7 isc_result_totext [function] [call site] 00265
7 syslog [call site] 00266
5 isc_result_totext [function] [call site] 00267
5 syslog [call site] 00268
5 isc_stdio_open [function] [call site] 00269
6 fopen64 [call site] 00270
6 __errno_location [call site] 00271
6 isc___errno2result [function] [call site] 00272
4 isc_result_totext [function] [call site] 00273
4 syslog [call site] 00274
4 fprintf [call site] 00275
4 fflush [call site] 00276
4 isc_assertion_failed [function] [call site] 00277
4 fileno [call site] 00278
4 fstat64 [call site] 00279
4 syslog [call site] 00280
4 pthread_mutex_unlock [call site] 00281
4 isc_string_strerror_r [function] [call site] 00282
4 isc_error_fatal [function] [call site] 00283
4 urcu_memb_read_unlock [call site] 00284
1 dns_db_beginload [function] [call site] 00285
2 isc_assertion_failed [function] [call site] 00286
2 isc_assertion_failed [function] [call site] 00287
1 dns_master_loadbuffer [function] [call site] 00288
2 isc_assertion_failed [function] [call site] 00289
2 loadctx_create [function] [call site] 00290
3 isc_assertion_failed [function] [call site] 00291
3 isc_assertion_failed [function] [call site] 00292
3 isc_assertion_failed [function] [call site] 00293
3 isc_assertion_failed [function] [call site] 00294
3 isc_assertion_failed [function] [call site] 00295
3 isc_assertion_failed [function] [call site] 00296
3 dns_name_isabsolute [function] [call site] 00297
3 isc_assertion_failed [function] [call site] 00298
3 dns_name_isabsolute [function] [call site] 00299
3 isc_assertion_failed [function] [call site] 00300
3 isc__mem_get [function] [call site] 00301
4 isc_assertion_failed [function] [call site] 00302
4 mem_get [function] [call site] 00303
5 mallocx [function] [call site] 00304
5 oom [function] [call site] 00305
4 mem_getstats [function] [call site] 00306
5 isc_tid [function] [call site] 00307
3 incctx_create [function] [call site] 00308
4 isc__mem_get [function] [call site] 00309
4 dns_fixedname_init [function] [call site] 00310
5 dns_name_init [function] [call site] 00311
5 isc_buffer_init [function] [call site] 00312
5 dns_name_setbuffer [function] [call site] 00313
6 isc_assertion_failed [function] [call site] 00314
6 isc_assertion_failed [function] [call site] 00315
4 dns_fixedname_name [function] [call site] 00316
4 dns_name_toregion [function] [call site] 00317
5 isc_assertion_failed [function] [call site] 00318
5 isc_assertion_failed [function] [call site] 00319
4 dns_name_fromregion [function] [call site] 00320
5 isc_assertion_failed [function] [call site] 00321
5 isc_assertion_failed [function] [call site] 00322
5 isc_assertion_failed [function] [call site] 00323
5 isc_buffer_clear [function] [call site] 00324
6 isc_assertion_failed [function] [call site] 00325
5 isc_buffer_availableregion [function] [call site] 00326
6 isc_assertion_failed [function] [call site] 00327
6 isc_assertion_failed [function] [call site] 00328
5 isc_assertion_failed [function] [call site] 00329
5 isc_assertion_failed [function] [call site] 00330
5 isc_assertion_failed [function] [call site] 00331
5 isc_buffer_add [function] [call site] 00332
3 isc_assertion_failed [function] [call site] 00333
3 isc_lex_create [function] [call site] 00334
4 isc_assertion_failed [function] [call site] 00335
4 isc__mem_get [function] [call site] 00336
4 isc__mem_get [function] [call site] 00337
3 isc_lex_setspecials [function] [call site] 00338
4 isc_assertion_failed [function] [call site] 00339
3 isc_lex_setcomments [function] [call site] 00340
4 isc_assertion_failed [function] [call site] 00341
3 isc_stdtime_now [function] [call site] 00342
4 clock_gettime [call site] 00343
4 __errno_location [call site] 00344
4 isc_string_strerror_r [function] [call site] 00345
4 isc_error_fatal [function] [call site] 00346
4 isc_assertion_failed [function] [call site] 00347
3 dns_fixedname_initname [function] [call site] 00348
4 dns_fixedname_init [function] [call site] 00349
4 dns_fixedname_name [function] [call site] 00350
3 dns_name_toregion [function] [call site] 00351
3 dns_name_fromregion [function] [call site] 00352
3 dns_master_initrawheader [function] [call site] 00353
3 isc_mem_attach [function] [call site] 00354
4 isc_assertion_failed [function] [call site] 00355
4 isc_mem_ref [function] [call site] 00356
2 isc_lex_openbuffer [function] [call site] 00357
3 isc_assertion_failed [function] [call site] 00358
3 snprintf [call site] 00359
3 new_source [function] [call site] 00360
4 isc__mem_get [function] [call site] 00361
4 isc__mem_strdup [function] [call site] 00362
5 isc_assertion_failed [function] [call site] 00363
5 isc_assertion_failed [function] [call site] 00364
5 strlen [call site] 00365
5 isc__mem_allocate [function] [call site] 00366
6 isc_assertion_failed [function] [call site] 00367
6 mem_get [function] [call site] 00368
6 sallocx [function] [call site] 00369
7 get_size_info [function] [call site] 00370
8 get_header_size [function] [call site] 00371
6 mem_getstats [function] [call site] 00372
5 strlcpy [call site] 00373
4 isc_buffer_allocate [function] [call site] 00374
5 isc_assertion_failed [function] [call site] 00375
5 isc__mem_get [function] [call site] 00376
5 isc_buffer_init [function] [call site] 00377
5 isc_buffer_setmctx [function] [call site] 00378
6 isc_assertion_failed [function] [call site] 00379
2 isc_assertion_failed [function] [call site] 00380
2 dns_loadctx_detach [function] [call site] 00381
3 isc_assertion_failed [function] [call site] 00382
3 dns_loadctx_unref [function] [call site] 00383
4 loadctx_destroy [function] [call site] 00384
5 incctx_destroy [function] [call site] 00385
6 isc__mem_put [function] [call site] 00386
7 mem_putstats [function] [call site] 00387
8 isc_tid [function] [call site] 00388
7 mem_put [function] [call site] 00389
8 sdallocx [function] [call site] 00390
9 get_size_info [function] [call site] 00391
9 get_header_size [function] [call site] 00392
9 isc_assertion_failed [function] [call site] 00393
9 get_aligned_size [function] [call site] 00394
9 isc_assertion_failed [function] [call site] 00395
9 free_aligned_sized [function] [call site] 00396
9 isc_assertion_failed [function] [call site] 00397
9 free_sized [function] [call site] 00398
8 mem_purge [function] [call site] 00399
9 isc_stdtime_now [function] [call site] 00400
9 malloc_trim [call site] 00401
5 isc_stdio_close [function] [call site] 00402
6 fclose [call site] 00403
6 __errno_location [call site] 00404
6 isc___errno2result [function] [call site] 00405
5 isc_result_totext [function] [call site] 00406
5 isc_error_unexpected [function] [call site] 00407
5 isc_lex_destroy [function] [call site] 00408
6 isc_assertion_failed [function] [call site] 00409
6 isc_assertion_failed [function] [call site] 00410
6 isc_lex_close [function] [call site] 00411
7 isc_assertion_failed [function] [call site] 00412
7 isc_assertion_failed [function] [call site] 00413
7 fclose [call site] 00414
7 isc__mem_free [function] [call site] 00415
8 isc_assertion_failed [function] [call site] 00416
8 isc_assertion_failed [function] [call site] 00417
8 sallocx [function] [call site] 00418
8 mem_putstats [function] [call site] 00419
8 mem_put [function] [call site] 00420
7 isc_buffer_free [function] [call site] 00421
8 isc_assertion_failed [function] [call site] 00422
8 isc_assertion_failed [function] [call site] 00423
8 isc_buffer_clearmctx [function] [call site] 00424
9 isc_assertion_failed [function] [call site] 00425
9 isc__mem_put [function] [call site] 00426
8 isc_buffer_invalidate [function] [call site] 00427
9 isc_assertion_failed [function] [call site] 00428
9 isc_assertion_failed [function] [call site] 00429
9 isc_assertion_failed [function] [call site] 00430
8 isc__mem_put [function] [call site] 00431
7 isc__mem_put [function] [call site] 00432
6 isc_error_fatal [function] [call site] 00433
6 isc__mem_put [function] [call site] 00434
6 isc__mem_put [function] [call site] 00435
5 isc__mem_putanddetach [function] [call site] 00436
6 isc_assertion_failed [function] [call site] 00437
6 isc_assertion_failed [function] [call site] 00438
6 isc_assertion_failed [function] [call site] 00439
6 isc__mem_put [function] [call site] 00440
6 isc_mem_detach [function] [call site] 00441
7 isc_mem_unref [function] [call site] 00442
8 mem_destroy [function] [call site] 00443
9 isc_assertion_failed [function] [call site] 00444
9 isc_assertion_failed [function] [call site] 00445
9 pthread_mutex_lock [call site] 00446
9 isc_string_strerror_r [function] [call site] 00447
9 isc_error_fatal [function] [call site] 00448
9 isc_assertion_failed [function] [call site] 00449
9 pthread_mutex_unlock [call site] 00450
9 isc_string_strerror_r [function] [call site] 00451
9 isc_error_fatal [function] [call site] 00452
9 isc_mem_inuse [function] [call site] 00453
9 isc_assertion_failed [function] [call site] 00454
9 pthread_mutex_destroy [call site] 00455
9 isc_string_strerror_r [function] [call site] 00456
9 isc_error_fatal [function] [call site] 00457
9 isc_os_cacheline [function] [call site] 00458
9 ffs [call site] 00459
9 sdallocx [function] [call site] 00460
1 isc_result_totext [function] [call site] 00461
1 fprintf [call site] 00462
1 dns_db_endload [function] [call site] 00463
2 isc_assertion_failed [function] [call site] 00464
2 isc_assertion_failed [function] [call site] 00465
2 isc_assertion_failed [function] [call site] 00466
2 call_updatenotify [function] [call site] 00467
3 urcu_memb_read_lock [call site] 00468
3 rcu_dereference_sym [call site] 00469
3 cds_lfht_first [call site] 00470
3 cds_lfht_iter_get_node [function] [call site] 00471
3 cds_lfht_is_node_deleted [call site] 00472
3 cds_lfht_next [call site] 00473
3 urcu_memb_read_unlock [call site] 00474
1 isc_result_totext [function] [call site] 00475
1 fprintf [call site] 00476
1 dns_db_detach [function] [call site] 00477
2 isc_assertion_failed [function] [call site] 00478
2 dns_db_unref [function] [call site] 00479
3 dns__db_destroy [function] [call site] 00480
1 isc_mem_detach [function] [call site] 00481