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
126 135 isc_log_doit call site: 00135 isc_log_open
16 37 isc_mem_inuse call site: 00037 write_errno
15 19 mem_create call site: 00019 total_inuse
7 384 mem_purge call site: 00384 isc_stdio_close
4 71 isc_rwlock_rdlock call site: 00071 read_indicator_depart
4 268 isc_log_doit call site: 00268 isc_assertion_failed
3 131 isc_time_formatISO8601TZms call site: 00131 snprintf
3 335 isc_stdtime_now call site: 00335 isc_string_strerror_r
3 372 dns_master_loadbuffer call site: 00372 dns_loadctx_unref
3 455 call_updatenotify call site: 00455 urcu_memb_read_unlock
3 459 LLVMFuzzerTestOneInput call site: 00459 dns_db_unref
2 79 isc_rwlock_rdunlock call site: 00079 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 mallocx [function] [call site] 00017
4 isc_assertion_failed [function] [call site] 00018
3 oom [function] [call site] 00019
4 fileno [call site] 00020
4 write_string [function] [call site] 00021
5 strlen [call site] 00022
5 write [call site] 00023
5 abort [call site] 00024
4 write_size [function] [call site] 00025
5 write_string [function] [call site] 00026
4 write_string [function] [call site] 00027
4 total_inuse [function] [call site] 00028
5 pthread_mutex_lock [call site] 00029
5 isc_string_strerror_r [function] [call site] 00030
6 __xpg_strerror_r [call site] 00031
5 isc_error_fatal [function] [call site] 00032
6 abort [call site] 00033
5 isc_mem_inuse [function] [call site] 00034
6 isc_assertion_failed [function] [call site] 00035
6 isc_tid_count [function] [call site] 00036
6 isc_assertion_failed [function] [call site] 00037
5 pthread_mutex_unlock [call site] 00038
5 isc_string_strerror_r [function] [call site] 00039
5 isc_error_fatal [function] [call site] 00040
4 write_size [function] [call site] 00041
4 write_string [function] [call site] 00042
4 __errno_location [call site] 00043
4 write_errno [function] [call site] 00044
5 isc_string_strerror_r [function] [call site] 00045
5 write_string [function] [call site] 00046
4 write_string [function] [call site] 00047
4 write_backtrace [function] [call site] 00048
5 isc_backtrace [function] [call site] 00049
6 backtrace [call site] 00050
5 isc_backtrace_symbols_fd [function] [call site] 00051
6 backtrace_symbols_fd [call site] 00052
4 abort [call site] 00053
3 strdup [call site] 00054
3 pthread_mutex_init [call site] 00055
3 isc_string_strerror_r [function] [call site] 00056
3 isc_error_fatal [function] [call site] 00057
3 pthread_mutex_lock [call site] 00058
3 isc_string_strerror_r [function] [call site] 00059
3 isc_error_fatal [function] [call site] 00060
3 pthread_mutex_unlock [call site] 00061
3 isc_string_strerror_r [function] [call site] 00062
3 isc_error_fatal [function] [call site] 00063
1 dns_db_create [function] [call site] 00064
2 isc_assertion_failed [function] [call site] 00065
2 dns_name_isabsolute [function] [call site] 00066
3 isc_assertion_failed [function] [call site] 00067
2 isc_assertion_failed [function] [call site] 00068
2 isc_rwlock_rdlock [function] [call site] 00069
3 read_indicator_arrive [function] [call site] 00070
3 writers_lock_islocked [function] [call site] 00071
3 read_indicator_depart [function] [call site] 00072
3 writers_lock_islocked [function] [call site] 00073
3 writers_barrier_raise [function] [call site] 00074
3 writers_barrier_lower [function] [call site] 00075
2 impfind [function] [call site] 00076
3 strcasecmp [call site] 00077
2 isc_rwlock_rdunlock [function] [call site] 00078
3 read_indicator_depart [function] [call site] 00079
2 isc_rwlock_rdunlock [function] [call site] 00080
2 isc_log_write [function] [call site] 00081
3 isc_log_doit [function] [call site] 00082
4 isc_assertion_failed [function] [call site] 00083
4 isc_assertion_failed [function] [call site] 00084
4 isc_assertion_failed [function] [call site] 00085
4 isc_assertion_failed [function] [call site] 00086
4 isc_assertion_failed [function] [call site] 00087
4 isc_log_wouldlog [function] [call site] 00088
4 urcu_memb_read_lock [call site] 00089
4 pthread_mutex_lock [call site] 00090
4 isc_string_strerror_r [function] [call site] 00091
4 isc_error_fatal [function] [call site] 00092
4 rcu_dereference_sym [call site] 00093
4 isc_time_now [function] [call site] 00094
5 time_now [function] [call site] 00095
6 clock_gettime [call site] 00096
6 isc_error_fatal [function] [call site] 00097
6 isc_assertion_failed [function] [call site] 00098
6 isc_assertion_failed [function] [call site] 00099
4 isc_time_formattimestamp [function] [call site] 00100
5 isc_assertion_failed [function] [call site] 00101
5 isc_assertion_failed [function] [call site] 00102
5 isc_assertion_failed [function] [call site] 00103
5 localtime_r [call site] 00104
5 strftime [call site] 00105
5 strlcpy [call site] 00106
5 snprintf [call site] 00107
4 isc_time_formatISO8601ms [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 gmtime_r [call site] 00112
5 strftime [call site] 00113
5 strlcpy [call site] 00114
5 snprintf [call site] 00115
4 isc_time_formatISO8601Lms [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 localtime_r [call site] 00120
5 strftime [call site] 00121
5 strlcpy [call site] 00122
5 snprintf [call site] 00123
4 isc_time_formatISO8601TZms [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 snprintf [call site] 00130
5 isc_assertion_failed [function] [call site] 00131
4 snprintf [call site] 00132
4 snprintf [call site] 00133
4 snprintf [call site] 00134
4 vsnprintf [call site] 00135
4 stat64 [call site] 00136
4 __errno_location [call site] 00137
4 fclose [call site] 00138
4 isc_log_open [function] [call site] 00139
5 isc_assertion_failed [function] [call site] 00140
5 isc_assertion_failed [function] [call site] 00141
5 isc_assertion_failed [function] [call site] 00142
5 stat64 [call site] 00143
5 __errno_location [call site] 00144
5 isc_logfile_roll [function] [call site] 00145
6 isc_assertion_failed [function] [call site] 00146
6 isc_file_remove [function] [call site] 00147
7 isc_assertion_failed [function] [call site] 00148
7 unlink [call site] 00149
7 __errno_location [call site] 00150
7 isc___errno2result [function] [call site] 00151
8 isc_string_strerror_r [function] [call site] 00152
8 isc_error_unexpected [function] [call site] 00153
6 isc_result_totext [function] [call site] 00154
6 syslog [call site] 00155
6 roll_increment [function] [call site] 00156
7 isc_assertion_failed [function] [call site] 00157
7 isc_assertion_failed [function] [call site] 00158
7 snprintf [call site] 00159
7 isc_file_exists [function] [call site] 00160
8 isc_assertion_failed [function] [call site] 00161
8 file_stats [function] [call site] 00162
9 isc_assertion_failed [function] [call site] 00163
9 isc_assertion_failed [function] [call site] 00164
9 stat64 [call site] 00165
9 __errno_location [call site] 00166
9 isc___errno2result [function] [call site] 00167
7 greatest_version [function] [call site] 00168
8 strrchr [call site] 00169
8 strlcpy [call site] 00170
8 isc_result_totext [function] [call site] 00171
8 syslog [call site] 00172
8 strlen [call site] 00173
8 isc_dir_init [function] [call site] 00174
9 isc_assertion_failed [function] [call site] 00175
8 isc_dir_open [function] [call site] 00176
9 isc_assertion_failed [function] [call site] 00177
9 isc_assertion_failed [function] [call site] 00178
9 strlen [call site] 00179
9 strlcpy [call site] 00180
9 strlen [call site] 00181
9 opendir [call site] 00182
9 __errno_location [call site] 00183
9 isc___errno2result [function] [call site] 00184
8 isc_dir_read [function] [call site] 00185
9 isc_assertion_failed [function] [call site] 00186
9 readdir64 [call site] 00187
9 strlen [call site] 00188
9 strlcpy [call site] 00189
9 strlen [call site] 00190
8 strncmp [call site] 00191
8 __isoc23_strtol [call site] 00192
8 dirfd [call site] 00193
8 unlinkat [call site] 00194
8 __errno_location [call site] 00195
8 isc_errno_toresult [function] [call site] 00196
9 isc___errno2result [function] [call site] 00197
8 isc_result_totext [function] [call site] 00198
8 syslog [call site] 00199
8 isc_dir_close [function] [call site] 00200
9 isc_assertion_failed [function] [call site] 00201
9 closedir [call site] 00202
7 snprintf [call site] 00203
7 snprintf [call site] 00204
7 isc_file_rename [function] [call site] 00205
8 isc_assertion_failed [function] [call site] 00206
8 isc_assertion_failed [function] [call site] 00207
8 rename [call site] 00208
8 __errno_location [call site] 00209
8 isc___errno2result [function] [call site] 00210
7 isc_result_totext [function] [call site] 00211
7 syslog [call site] 00212
7 snprintf [call site] 00213
7 isc_file_rename [function] [call site] 00214
7 isc_result_totext [function] [call site] 00215
7 syslog [call site] 00216
6 roll_timestamp [function] [call site] 00217
7 isc_assertion_failed [function] [call site] 00218
7 isc_assertion_failed [function] [call site] 00219
7 remove_old_tsversions [function] [call site] 00220
8 strrchr [call site] 00221
8 strlcpy [call site] 00222
8 isc_result_totext [function] [call site] 00223
8 syslog [call site] 00224
8 strlen [call site] 00225
8 isc_dir_init [function] [call site] 00226
8 isc_dir_open [function] [call site] 00227
8 last_to_keep [function] [call site] 00228
9 isc_dir_read [function] [call site] 00229
9 strncmp [call site] 00230
9 __isoc23_strtoull [call site] 00231
9 insert_sort [function] [call site] 00232
9 isc_dir_reset [function] [call site] 00233
10 isc_assertion_failed [function] [call site] 00234
10 rewinddir [call site] 00235
8 isc_dir_read [function] [call site] 00236
8 strncmp [call site] 00237
8 __isoc23_strtoull [call site] 00238
8 dirfd [call site] 00239
8 unlinkat [call site] 00240
8 __errno_location [call site] 00241
8 isc_errno_toresult [function] [call site] 00242
8 isc_result_totext [function] [call site] 00243
8 syslog [call site] 00244
8 isc_dir_close [function] [call site] 00245
7 isc_time_now [function] [call site] 00246
7 isc_time_formatshorttimestamp [function] [call site] 00247
8 isc_assertion_failed [function] [call site] 00248
8 isc_assertion_failed [function] [call site] 00249
8 isc_assertion_failed [function] [call site] 00250
8 gmtime_r [call site] 00251
8 strftime [call site] 00252
8 strlcpy [call site] 00253
8 snprintf [call site] 00254
7 snprintf [call site] 00255
7 isc_file_rename [function] [call site] 00256
7 isc_result_totext [function] [call site] 00257
7 syslog [call site] 00258
5 isc_result_totext [function] [call site] 00259
5 syslog [call site] 00260
5 isc_stdio_open [function] [call site] 00261
6 fopen64 [call site] 00262
6 __errno_location [call site] 00263
6 isc___errno2result [function] [call site] 00264
4 isc_result_totext [function] [call site] 00265
4 syslog [call site] 00266
4 fprintf [call site] 00267
4 fflush [call site] 00268
4 isc_assertion_failed [function] [call site] 00269
4 fileno [call site] 00270
4 fstat64 [call site] 00271
4 syslog [call site] 00272
4 pthread_mutex_unlock [call site] 00273
4 isc_string_strerror_r [function] [call site] 00274
4 isc_error_fatal [function] [call site] 00275
4 urcu_memb_read_unlock [call site] 00276
1 dns_db_beginload [function] [call site] 00277
2 isc_assertion_failed [function] [call site] 00278
2 isc_assertion_failed [function] [call site] 00279
1 dns_master_loadbuffer [function] [call site] 00280
2 isc_assertion_failed [function] [call site] 00281
2 loadctx_create [function] [call site] 00282
3 isc_assertion_failed [function] [call site] 00283
3 isc_assertion_failed [function] [call site] 00284
3 isc_assertion_failed [function] [call site] 00285
3 isc_assertion_failed [function] [call site] 00286
3 isc_assertion_failed [function] [call site] 00287
3 isc_assertion_failed [function] [call site] 00288
3 dns_name_isabsolute [function] [call site] 00289
3 isc_assertion_failed [function] [call site] 00290
3 dns_name_isabsolute [function] [call site] 00291
3 isc_assertion_failed [function] [call site] 00292
3 isc__mem_get [function] [call site] 00293
4 isc_assertion_failed [function] [call site] 00294
4 mem_get [function] [call site] 00295
5 mallocx [function] [call site] 00296
5 oom [function] [call site] 00297
4 mem_getstats [function] [call site] 00298
5 isc_tid [function] [call site] 00299
3 incctx_create [function] [call site] 00300
4 isc__mem_get [function] [call site] 00301
4 dns_fixedname_init [function] [call site] 00302
5 dns_name_init [function] [call site] 00303
5 isc_buffer_init [function] [call site] 00304
5 dns_name_setbuffer [function] [call site] 00305
6 isc_assertion_failed [function] [call site] 00306
6 isc_assertion_failed [function] [call site] 00307
4 dns_fixedname_name [function] [call site] 00308
4 dns_name_toregion [function] [call site] 00309
5 isc_assertion_failed [function] [call site] 00310
5 isc_assertion_failed [function] [call site] 00311
4 dns_name_fromregion [function] [call site] 00312
5 isc_assertion_failed [function] [call site] 00313
5 isc_assertion_failed [function] [call site] 00314
5 isc_assertion_failed [function] [call site] 00315
5 isc_buffer_clear [function] [call site] 00316
6 isc_assertion_failed [function] [call site] 00317
5 isc_buffer_availableregion [function] [call site] 00318
6 isc_assertion_failed [function] [call site] 00319
6 isc_assertion_failed [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_add [function] [call site] 00324
3 isc_assertion_failed [function] [call site] 00325
3 isc_lex_create [function] [call site] 00326
4 isc_assertion_failed [function] [call site] 00327
4 isc__mem_get [function] [call site] 00328
4 isc__mem_get [function] [call site] 00329
3 isc_lex_setspecials [function] [call site] 00330
4 isc_assertion_failed [function] [call site] 00331
3 isc_lex_setcomments [function] [call site] 00332
4 isc_assertion_failed [function] [call site] 00333
3 isc_stdtime_now [function] [call site] 00334
4 clock_gettime [call site] 00335
4 __errno_location [call site] 00336
4 isc_string_strerror_r [function] [call site] 00337
4 isc_error_fatal [function] [call site] 00338
4 isc_assertion_failed [function] [call site] 00339
3 dns_fixedname_initname [function] [call site] 00340
4 dns_fixedname_init [function] [call site] 00341
4 dns_fixedname_name [function] [call site] 00342
3 dns_name_toregion [function] [call site] 00343
3 dns_name_fromregion [function] [call site] 00344
3 dns_master_initrawheader [function] [call site] 00345
3 isc_mem_attach [function] [call site] 00346
4 isc_assertion_failed [function] [call site] 00347
4 isc_mem_ref [function] [call site] 00348
2 isc_lex_openbuffer [function] [call site] 00349
3 isc_assertion_failed [function] [call site] 00350
3 snprintf [call site] 00351
3 new_source [function] [call site] 00352
4 isc__mem_get [function] [call site] 00353
4 isc__mem_strdup [function] [call site] 00354
5 isc_assertion_failed [function] [call site] 00355
5 isc_assertion_failed [function] [call site] 00356
5 strlen [call site] 00357
5 isc__mem_allocate [function] [call site] 00358
6 isc_assertion_failed [function] [call site] 00359
6 mem_get [function] [call site] 00360
6 sallocx [function] [call site] 00361
7 malloc_usable_size [call site] 00362
6 mem_getstats [function] [call site] 00363
5 strlcpy [call site] 00364
4 isc_buffer_allocate [function] [call site] 00365
5 isc_assertion_failed [function] [call site] 00366
5 isc__mem_get [function] [call site] 00367
5 isc_buffer_init [function] [call site] 00368
5 isc_buffer_setmctx [function] [call site] 00369
6 isc_assertion_failed [function] [call site] 00370
2 isc_assertion_failed [function] [call site] 00371
2 dns_loadctx_detach [function] [call site] 00372
3 isc_assertion_failed [function] [call site] 00373
3 dns_loadctx_unref [function] [call site] 00374
4 loadctx_destroy [function] [call site] 00375
5 incctx_destroy [function] [call site] 00376
6 isc__mem_put [function] [call site] 00377
7 isc_assertion_failed [function] [call site] 00378
7 mem_putstats [function] [call site] 00379
8 isc_tid [function] [call site] 00380
7 mem_put [function] [call site] 00381
8 sdallocx [function] [call site] 00382
8 mem_purge [function] [call site] 00383
9 isc_stdtime_now [function] [call site] 00384
9 malloc_trim [call site] 00385
5 isc_stdio_close [function] [call site] 00386
6 fclose [call site] 00387
6 __errno_location [call site] 00388
6 isc___errno2result [function] [call site] 00389
5 isc_result_totext [function] [call site] 00390
5 isc_error_unexpected [function] [call site] 00391
5 isc_lex_destroy [function] [call site] 00392
6 isc_assertion_failed [function] [call site] 00393
6 isc_assertion_failed [function] [call site] 00394
6 isc_lex_close [function] [call site] 00395
7 isc_assertion_failed [function] [call site] 00396
7 isc_assertion_failed [function] [call site] 00397
7 fclose [call site] 00398
7 isc__mem_free [function] [call site] 00399
8 isc_assertion_failed [function] [call site] 00400
8 isc_assertion_failed [function] [call site] 00401
8 sallocx [function] [call site] 00402
8 mem_putstats [function] [call site] 00403
8 mem_put [function] [call site] 00404
7 isc_buffer_free [function] [call site] 00405
8 isc_assertion_failed [function] [call site] 00406
8 isc_assertion_failed [function] [call site] 00407
8 isc_buffer_clearmctx [function] [call site] 00408
9 isc_assertion_failed [function] [call site] 00409
9 isc__mem_put [function] [call site] 00410
8 isc_buffer_invalidate [function] [call site] 00411
9 isc_assertion_failed [function] [call site] 00412
9 isc_assertion_failed [function] [call site] 00413
9 isc_assertion_failed [function] [call site] 00414
8 isc__mem_put [function] [call site] 00415
7 isc__mem_put [function] [call site] 00416
6 isc_error_fatal [function] [call site] 00417
6 isc__mem_put [function] [call site] 00418
6 isc__mem_put [function] [call site] 00419
5 isc__mem_putanddetach [function] [call site] 00420
6 isc_assertion_failed [function] [call site] 00421
6 isc_assertion_failed [function] [call site] 00422
6 isc_assertion_failed [function] [call site] 00423
6 isc__mem_put [function] [call site] 00424
6 isc_mem_detach [function] [call site] 00425
7 isc_mem_unref [function] [call site] 00426
8 mem_destroy [function] [call site] 00427
9 isc_assertion_failed [function] [call site] 00428
9 pthread_mutex_lock [call site] 00429
9 isc_string_strerror_r [function] [call site] 00430
9 isc_error_fatal [function] [call site] 00431
9 isc_assertion_failed [function] [call site] 00432
9 pthread_mutex_unlock [call site] 00433
9 isc_string_strerror_r [function] [call site] 00434
9 isc_error_fatal [function] [call site] 00435
9 isc_mem_inuse [function] [call site] 00436
9 isc_assertion_failed [function] [call site] 00437
9 isc_assertion_failed [function] [call site] 00438
9 pthread_mutex_destroy [call site] 00439
9 isc_string_strerror_r [function] [call site] 00440
9 isc_error_fatal [function] [call site] 00441
9 sdallocx [function] [call site] 00442
1 isc_result_totext [function] [call site] 00443
1 fprintf [call site] 00444
1 dns_db_endload [function] [call site] 00445
2 isc_assertion_failed [function] [call site] 00446
2 isc_assertion_failed [function] [call site] 00447
2 isc_assertion_failed [function] [call site] 00448
2 call_updatenotify [function] [call site] 00449
3 urcu_memb_read_lock [call site] 00450
3 rcu_dereference_sym [call site] 00451
3 cds_lfht_first [call site] 00452
3 cds_lfht_iter_get_node [function] [call site] 00453
3 cds_lfht_is_node_deleted [call site] 00454
3 cds_lfht_next [call site] 00455
3 urcu_memb_read_unlock [call site] 00456
1 isc_result_totext [function] [call site] 00457
1 fprintf [call site] 00458
1 dns_db_detach [function] [call site] 00459
2 isc_assertion_failed [function] [call site] 00460
2 dns_db_unref [function] [call site] 00461
3 dns__db_destroy [function] [call site] 00462
1 isc_mem_detach [function] [call site] 00463