Fuzz introspector: fuzz-hostname-setup
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
286 403 xopenat_full call site: {node_id} pid_get_cmdline_strv
155 27 should_parse_proc_cmdline call site: {node_id} proc_cmdline_parse
98 260 xopenat_full call site: {node_id} btrfs_subvol_make_fallback
72 856 loop_read call site: {node_id} sd_id128_from_string
43 772 log_open call site: {node_id} log_open_syslog
26 228 xopenat_full call site: {node_id} fd_reopen
23 379 xopenat_full call site: {node_id} chattr_fd
19 752 stderr_is_journal call site: {node_id} extract_first_word
16 206 read_line_full call site: {node_id} get_proc_field
10 359 xopenat_full call site: {node_id} fd_reopen
9 696 log_parse_environment_variables call site: {node_id} log_set_max_level_from_string
9 818 log_open call site: {node_id} open_terminal

Fuzzer calltree

0 LLVMFuzzerTestOneInput [function] [call site] 00000
1 data_to_file [function] [call site] 00001
2 fmemopen_unlocked [function] [call site] 00003
3 __fsetlocking [function] [call site] 00005
1 assert_se [function] [call site] 00006
1 fuzz_setup_logging [function] [call site] 00007
2 log_set_assert_return_is_critical [function] [call site] 00008
2 log_set_max_level [function] [call site] 00009
3 log_level_is_valid [function] [call site] 00011
3 setlogmask [function] [call site] 00012
3 assert_cc [function] [call site] 00014
2 log_setup [function] [call site] 00016
3 log_parse_environment [function] [call site] 00020
4 should_parse_proc_cmdline [function] [call site] 00021
5 getpid_cached [function] [call site] 00022
6 __atomic_compare_exchange_n [function] [call site] 00023
6 pthread_atfork [function] [call site] 00025
5 invoked_by_systemd [function] [call site] 00027
6 parse_pid [function] [call site] 00029
7 safe_atolu [function] [call site] 00031
8 safe_atolu_full [function] [call site] 00032
9 assert_cc [function] [call site] 00033
9 safe_atou_full [function] [call site] 00034
10 SAFE_ATO_MASK_FLAGS [function] [call site] 00037
10 FLAGS_SET [function] [call site] 00038
10 FLAGS_SET [function] [call site] 00041
10 FLAGS_SET [function] [call site] 00043
10 mangle_base [function] [call site] 00045
11 SAFE_ATO_MASK_FLAGS [function] [call site] 00048
11 STARTSWITH_SET [function] [call site] 00049
11 STARTSWITH_SET [function] [call site] 00050
10 SAFE_ATO_MASK_FLAGS [function] [call site] 00052
7 pid_is_valid [function] [call site] 00053
6 log_debug_errno [function] [call site] 00054
6 getpid_cached [function] [call site] 00055
4 proc_cmdline_parse [function] [call site] 00056
5 proc_cmdline_strv_internal [function] [call site] 00059
6 secure_getenv [function] [call site] 00061
6 detect_container [function] [call site] 00098
7 log_debug_errno [function] [call site] 00100
7 log_debug_errno [function] [call site] 00102
7 read_one_line_file [function] [call site] 00103
8 read_one_line_file_at [function] [call site] 00104
9 fopen_unlocked_at [function] [call site] 00108
10 xfopenat_full [function] [call site] 00109
11 FLAGS_SET [function] [call site] 00136
11 xfopenat_unix_socket [function] [call site] 00137
12 connect_unix_path [function] [call site] 00153
13 connect_unix_inode [function] [call site] 00156
14 connect_unix_path_simple [function] [call site] 00159
14 FORMAT_PROC_FD_PATH [function] [call site] 00170
13 sizeof_field [function] [call site] 00173
13 connect_unix_path_simple [function] [call site] 00174
13 connect_unix_inode [function] [call site] 00176
12 shutdown [function] [call site] 00177
12 take_fdopen [function] [call site] 00178
11 FLAGS_SET [function] [call site] 00180
11 __fsetlocking [function] [call site] 00181
7 log_debug_errno [function] [call site] 00207
7 get_proc_field [function] [call site] 00210
8 fopen_unlocked [function] [call site] 00213
9 fopen_unlocked_at [function] [call site] 00214
8 proc_mounted [function] [call site] 00215
9 path_is_fs_type [function] [call site] 00216
10 is_fs_type_at [function] [call site] 00217
11 xstatfsat [function] [call site] 00218
12 xopenat [function] [call site] 00222
13 xopenat_full [function] [call site] 00223
14 FLAGS_SET [function] [call site] 00226
14 FLAGS_SET [function] [call site] 00227
14 FLAGS_SET [function] [call site] 00230
14 FLAGS_SET [function] [call site] 00231
14 fd_verify_regular [function] [call site] 00232
14 fd_reopen [function] [call site] 00245
15 FLAGS_SET [function] [call site] 00248
15 FLAGS_SET [function] [call site] 00249
15 FLAGS_SET [function] [call site] 00250
15 RET_NERRNO [function] [call site] 00251
15 proc_fd_enoent_errno [function] [call site] 00253
16 proc_mounted [function] [call site] 00254
14 FLAGS_SET [function] [call site] 00255
14 FLAGS_SET [function] [call site] 00256
14 FLAGS_SET [function] [call site] 00259
14 FLAGS_SET [function] [call site] 00260
14 FLAGS_SET [function] [call site] 00261
14 btrfs_subvol_make_fallback [function] [call site] 00262
15 btrfs_subvol_make [function] [call site] 00266
16 extract_subvolume_name [function] [call site] 00270
17 path_extract_filename [function] [call site] 00273
18 path_is_valid [function] [call site] 00274
19 path_is_valid_full [function] [call site] 00275
20 path_find_first_component [function] [call site] 00277
21 skip_slash_or_dot [function] [call site] 00279
22 startswith [function] [call site] 00281
21 strchrnul [function] [call site] 00284
21 skip_slash_or_dot [function] [call site] 00285
18 path_find_last_component [function] [call site] 00287
19 skip_slash_or_dot_backward [function] [call site] 00292
19 PTR_SUB1 [function] [call site] 00297
19 skip_slash_or_dot_backward [function] [call site] 00299
18 TAKE_PTR [function] [call site] 00301
17 btrfs_validate_subvolume_name [function] [call site] 00303
18 filename_is_valid [function] [call site] 00304
19 dot_or_dot_dot [function] [call site] 00306
19 filename_part_is_valid [function] [call site] 00307
20 strchrnul [function] [call site] 00308
17 TAKE_PTR [function] [call site] 00310
16 path_extract_directory [function] [call site] 00311
17 path_find_last_component [function] [call site] 00312
17 strdup_to [function] [call site] 00314
17 path_simplify [function] [call site] 00316
18 path_simplify_full [function] [call site] 00317
19 FLAGS_SET [function] [call site] 00319
19 path_is_absolute [function] [call site] 00326
19 path_find_first_component [function] [call site] 00327
19 path_startswith [function] [call site] 00328
20 path_startswith_full [function] [call site] 00329
21 path_find_first_component [function] [call site] 00332
21 FLAGS_SET [function] [call site] 00333
21 path_find_first_component [function] [call site] 00334
21 FLAGS_SET [function] [call site] 00335
21 FLAGS_SET [function] [call site] 00336
17 path_is_valid [function] [call site] 00341
17 TAKE_PTR [function] [call site] 00342
16 fd_reopen_condition [function] [call site] 00343
16 RET_NERRNO [function] [call site] 00351
15 ERRNO_IS_NOT_SUPPORTED [function] [call site] 00354
14 RET_NERRNO [function] [call site] 00356
14 FLAGS_SET [function] [call site] 00358
14 FLAGS_SET [function] [call site] 00359
14 FLAGS_SET [function] [call site] 00360
14 fd_verify_regular [function] [call site] 00362
14 FLAGS_SET [function] [call site] 00363
14 FLAGS_SET [function] [call site] 00366
14 fd_verify_regular [function] [call site] 00368
14 fd_reopen [function] [call site] 00369
14 openat_report_new [function] [call site] 00370
14 label_ops_post [function] [call site] 00377
14 FLAGS_SET [function] [call site] 00379
14 chattr_fd [function] [call site] 00380
15 chattr_full [function] [call site] 00381
16 ERRNO_IS_IOCTL_NOT_SUPPORTED [function] [call site] 00390
16 FLAGS_SET [function] [call site] 00391
16 UPDATE_FLAG [function] [call site] 00392
16 FLAGS_SET [function] [call site] 00393
16 ERRNO_IS_IOCTL_NOT_SUPPORTED [function] [call site] 00395
16 log_full_errno [function] [call site] 00396
16 FLAGS_SET [function] [call site] 00397
16 ERRNO_IS_IOCTL_NOT_SUPPORTED [function] [call site] 00399
16 ERRNO_IS_IOCTL_NOT_SUPPORTED [function] [call site] 00401
14 ERRNO_IS_IOCTL_NOT_SUPPORTED [function] [call site] 00402
14 label_ops_post [function] [call site] 00404
14 unlinkat [function] [call site] 00405
12 RET_NERRNO [function] [call site] 00406
11 is_fs_type [function] [call site] 00408
12 assert_cc [function] [call site] 00410
12 F_TYPE_EQUAL [function] [call site] 00411
8 read_line [function] [call site] 00412
7 log_debug_errno [function] [call site] 00413
7 parse_pid [function] [call site] 00415
7 log_debug_errno [function] [call site] 00416
7 procfs_file_alloca [function] [call site] 00417
7 read_one_line_file [function] [call site] 00418
7 log_debug_errno [function] [call site] 00419
7 startswith [function] [call site] 00420
7 read_one_line_file [function] [call site] 00421
7 log_debug_errno [function] [call site] 00423
7 getpid_cached [function] [call site] 00424
7 read_one_line_file [function] [call site] 00427
7 log_debug_errno [function] [call site] 00429
7 getenv_for_pid [function] [call site] 00430
8 getpid_cached [function] [call site] 00434
8 strdup_to_full [function] [call site] 00435
8 pid_is_valid [function] [call site] 00437
8 procfs_file_alloca [function] [call site] 00438
8 fopen_unlocked [function] [call site] 00439
8 read_nul_string [function] [call site] 00440
9 read_line_full [function] [call site] 00441
8 startswith [function] [call site] 00442
8 strdup_to_full [function] [call site] 00443
7 log_debug_errno [function] [call site] 00444
7 detect_container_files [function] [call site] 00445
8 log_debug_errno [function] [call site] 00447
7 running_in_pidns [function] [call site] 00448
8 log_debug_errno [function] [call site] 00455
7 log_debug [function] [call site] 00456
7 detect_container_files [function] [call site] 00458
7 container_from_string [function] [call site] 00459
7 log_debug [function] [call site] 00460
7 virtualization_to_string [function] [call site] 00461
6 pid_get_cmdline_strv [function] [call site] 00462
7 pid_get_cmdline_nulstr [function] [call site] 00466
8 procfs_file_alloca [function] [call site] 00467
6 proc_cmdline_filter_pid1_args [function] [call site] 00542
7 STRV_FOREACH [function] [call site] 00547
7 strv_skip [function] [call site] 00548
8 strv_isempty [function] [call site] 00549
8 strv_isempty [function] [call site] 00550
7 strv_extend [function] [call site] 00551
8 strv_extend_with_size [function] [call site] 00552
9 strv_consume_with_size [function] [call site] 00554
10 strv_push_with_size [function] [call site] 00555
11 strv_length [function] [call site] 00556
12 STRV_FOREACH [function] [call site] 00557
7 strv_extend_strv [function] [call site] 00559
7 strv_skip [function] [call site] 00571
6 read_full_file [function] [call site] 00575
7 read_full_file_full [function] [call site] 00576
8 FLAGS_SET [function] [call site] 00579
8 xfopenat_full [function] [call site] 00580
8 read_full_stream_full [function] [call site] 00581
9 FLAGS_SET [function] [call site] 00585
9 FLAGS_SET [function] [call site] 00587
9 FLAGS_SET [function] [call site] 00591
9 warn_file_is_world_accessible [function] [call site] 00592
10 log_syntax [function] [call site] 00594
10 log_warning [function] [call site] 00595
9 FLAGS_SET [function] [call site] 00596
9 FLAGS_SET [function] [call site] 00598
9 memcpy_safe [function] [call site] 00600
9 explicit_bzero_safe [function] [call site] 00601
10 explicit_bzero [function] [call site] 00602
9 MALLOC_SIZEOF_SAFE [function] [call site] 00605
9 errno_or_else [function] [call site] 00609
9 FLAGS_SET [function] [call site] 00611
9 FLAGS_SET [function] [call site] 00614
9 unbase64mem_full [function] [call site] 00616
10 CLEANUP_ERASE_PTR [function] [call site] 00620
10 unbase64_next [function] [call site] 00629
10 unbase64_next [function] [call site] 00630
10 unbase64_next [function] [call site] 00631
10 TAKE_PTR [function] [call site] 00633
9 explicit_bzero_safe [function] [call site] 00647
9 free_and_replace [function] [call site] 00648
9 FLAGS_SET [function] [call site] 00649
9 explicit_bzero_safe [function] [call site] 00652
6 strv_split_full [function] [call site] 00653
4 log_parse_environment_variables [function] [call site] 00690
5 log_set_target_from_string [function] [call site] 00692
6 log_target_from_string [function] [call site] 00693
6 log_set_target [function] [call site] 00694
5 log_warning [function] [call site] 00695
5 log_set_max_level_from_string [function] [call site] 00697
6 extract_first_word [function] [call site] 00698
6 log_level_from_string [function] [call site] 00700
6 log_set_max_level [function] [call site] 00701
6 log_target_from_string [function] [call site] 00703
6 log_level_from_string [function] [call site] 00704
5 log_warning_errno [function] [call site] 00705
5 getenv_bool [function] [call site] 00706
6 parse_boolean [function] [call site] 00708
5 log_warning_errno [function] [call site] 00709
5 log_set_max_level [function] [call site] 00710
5 log_show_color_from_string [function] [call site] 00712
6 parse_boolean [function] [call site] 00713
6 log_show_color [function] [call site] 00714
5 log_warning [function] [call site] 00715
5 log_show_location_from_string [function] [call site] 00717
6 parse_boolean [function] [call site] 00718
6 log_show_location [function] [call site] 00719
5 log_warning [function] [call site] 00720
5 log_show_time_from_string [function] [call site] 00722
6 parse_boolean [function] [call site] 00723
6 log_show_time [function] [call site] 00724
5 log_warning [function] [call site] 00725
5 log_show_tid_from_string [function] [call site] 00727
6 parse_boolean [function] [call site] 00728
6 log_show_tid [function] [call site] 00729
5 log_warning [function] [call site] 00730
5 log_set_ratelimit_kmsg_from_string [function] [call site] 00732
6 parse_boolean [function] [call site] 00733
5 log_warning [function] [call site] 00734
3 log_open [function] [call site] 00735
4 log_close_syslog [function] [call site] 00743
4 log_close_console [function] [call site] 00746
5 safe_close_above_stdio [function] [call site] 00747
6 safe_close [function] [call site] 00748
4 getpid_cached [function] [call site] 00750
4 stderr_is_journal [function] [call site] 00751
5 extract_first_word [function] [call site] 00753
5 safe_atou64 [function] [call site] 00754
6 assert_cc [function] [call site] 00755
6 safe_atollu [function] [call site] 00756
7 safe_atollu_full [function] [call site] 00757
5 safe_atou64 [function] [call site] 00770
4 log_open_journal [function] [call site] 00774
5 create_log_socket [function] [call site] 00775
6 fd_inc_sndbuf [function] [call site] 00783
7 fd_set_sndbuf [function] [call site] 00784
8 getsockopt [function] [call site] 00785
8 setsockopt_int [function] [call site] 00786
9 setsockopt [function] [call site] 00787
8 getsockopt [function] [call site] 00788
8 setsockopt_int [function] [call site] 00789
6 getpid_cached [function] [call site] 00790
6 timeval_store [function] [call site] 00791
6 timeval_store [function] [call site] 00793
6 setsockopt [function] [call site] 00794
5 connect_unix_path [function] [call site] 00795
5 log_close_journal [function] [call site] 00796
4 log_close_syslog [function] [call site] 00797
4 log_close_console [function] [call site] 00798
4 log_open_syslog [function] [call site] 00800
5 create_log_socket [function] [call site] 00801
5 connect_unix_path [function] [call site] 00802
5 safe_close [function] [call site] 00803
5 create_log_socket [function] [call site] 00804
5 connect_unix_path [function] [call site] 00805
5 log_close_syslog [function] [call site] 00806
4 log_close_journal [function] [call site] 00807
4 log_close_console [function] [call site] 00808
4 log_open_kmsg [function] [call site] 00810
5 fd_move_above_stdio [function] [call site] 00812
4 log_close_journal [function] [call site] 00813
4 log_close_syslog [function] [call site] 00814
4 log_close_console [function] [call site] 00815
4 log_close_journal [function] [call site] 00816
4 log_close_syslog [function] [call site] 00817
4 log_open_console [function] [call site] 00818
5 open_terminal [function] [call site] 00819
6 usleep_safe [function] [call site] 00822
7 clock_nanosleep [function] [call site] 00823
7 TIMESPEC_STORE [function] [call site] 00824
6 isatty_safe [function] [call site] 00825
5 fd_move_above_stdio [function] [call site] 00827
3 log_on_console [function] [call site] 00828
3 log_show_color [function] [call site] 00830
1 read_etc_hostname_stream [function] [call site] 00831
2 read_stripped_line [function] [call site] 00834
2 hostname_substitute_wildcards [function] [call site] 00840
3 SD_ID128_MAKE [function] [call site] 00841
3 sd_id128_is_null [function] [call site] 00844
3 sd_id128_get_machine [function] [call site] 00845
3 siphash24_init [function] [call site] 00877
4 unaligned_read_le64 [function] [call site] 00880
5 le64toh [function] [call site] 00881
6 bswap_64_on_be [function] [call site] 00882
4 unaligned_read_le64 [function] [call site] 00883
3 siphash24_compress [function] [call site] 00909
2 hostname_cleanup [function] [call site] 00929
3 valid_ldh_char [function] [call site] 00931
4 ascii_isalpha [function] [call site] 00932
4 ascii_isdigit [function] [call site] 00933
2 hostname_is_valid [function] [call site] 00935