Fuzz introspector: fuzz-nspawn-settings
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
168 342 path_simplify_full call site: {node_id} pid_get_cmdline_strv
119 572 free_many call site: {node_id} read_full_file
56 128 startswith call site: {node_id} read_line
43 774 log_open call site: {node_id} log_open_syslog
35 208 read_line_full call site: {node_id} get_proc_field
32 244 strempty call site: {node_id} fd_reopen
31 288 path_find_first_component call site: {node_id} path_extract_directory
30 939 utf8_encoded_valid_unichar call site: {node_id} send_one_fd_sa
26 513 cescape_char call site: {node_id} strv_parse_nulstr_full
26 884 strstrip call site: {node_id} sd_journal_sendv
25 99 strv_split_full call site: {node_id} detect_container
20 911 string_is_safe call site: {node_id} memfd_new_full

Fuzzer calltree

0 LLVMFuzzerTestOneInput [function] [call site] 00000
1 _cleanup_ [function] [call site] 00001
1 outside_size_range [function] [call site] 00002
1 data_to_file [function] [call site] 00003
2 fmemopen_unlocked [function] [call site] 00005
3 __fsetlocking [function] [call site] 00007
1 assert_se [function] [call site] 00008
1 fuzz_setup_logging [function] [call site] 00009
2 log_set_assert_return_is_critical [function] [call site] 00010
2 log_set_max_level [function] [call site] 00011
3 log_level_is_valid [function] [call site] 00013
3 setlogmask [function] [call site] 00014
3 assert_cc [function] [call site] 00016
2 log_setup [function] [call site] 00018
3 log_parse_environment [function] [call site] 00022
4 should_parse_proc_cmdline [function] [call site] 00023
5 getpid_cached [function] [call site] 00024
6 __atomic_compare_exchange_n [function] [call site] 00025
6 pthread_atfork [function] [call site] 00027
5 invoked_by_systemd [function] [call site] 00029
6 parse_pid [function] [call site] 00031
7 safe_atolu [function] [call site] 00033
8 safe_atolu_full [function] [call site] 00034
9 assert_cc [function] [call site] 00035
9 safe_atou_full [function] [call site] 00036
10 SAFE_ATO_MASK_FLAGS [function] [call site] 00039
10 FLAGS_SET [function] [call site] 00040
10 FLAGS_SET [function] [call site] 00043
10 FLAGS_SET [function] [call site] 00045
10 mangle_base [function] [call site] 00047
11 SAFE_ATO_MASK_FLAGS [function] [call site] 00050
11 STARTSWITH_SET [function] [call site] 00051
11 STARTSWITH_SET [function] [call site] 00052
10 SAFE_ATO_MASK_FLAGS [function] [call site] 00054
7 pid_is_valid [function] [call site] 00055
6 log_debug_errno [function] [call site] 00056
6 getpid_cached [function] [call site] 00057
4 proc_cmdline_parse [function] [call site] 00058
5 proc_cmdline_strv_internal [function] [call site] 00061
6 secure_getenv [function] [call site] 00063
6 detect_container [function] [call site] 00100
7 log_debug_errno [function] [call site] 00102
7 log_debug_errno [function] [call site] 00104
7 read_one_line_file [function] [call site] 00105
8 read_one_line_file_at [function] [call site] 00106
9 fopen_unlocked_at [function] [call site] 00110
10 xfopenat_full [function] [call site] 00111
11 FLAGS_SET [function] [call site] 00138
11 xfopenat_unix_socket [function] [call site] 00139
12 connect_unix_path [function] [call site] 00155
13 connect_unix_inode [function] [call site] 00158
14 connect_unix_path_simple [function] [call site] 00161
14 FORMAT_PROC_FD_PATH [function] [call site] 00172
13 sizeof_field [function] [call site] 00175
13 connect_unix_path_simple [function] [call site] 00176
13 connect_unix_inode [function] [call site] 00178
12 shutdown [function] [call site] 00179
12 take_fdopen [function] [call site] 00180
11 FLAGS_SET [function] [call site] 00182
11 __fsetlocking [function] [call site] 00183
7 log_debug_errno [function] [call site] 00209
7 get_proc_field [function] [call site] 00212
8 fopen_unlocked [function] [call site] 00215
9 fopen_unlocked_at [function] [call site] 00216
8 proc_mounted [function] [call site] 00217
9 path_is_fs_type [function] [call site] 00218
10 is_fs_type_at [function] [call site] 00219
11 xstatfsat [function] [call site] 00220
12 xopenat [function] [call site] 00224
13 xopenat_full [function] [call site] 00225
14 FLAGS_SET [function] [call site] 00228
14 FLAGS_SET [function] [call site] 00229
14 FLAGS_SET [function] [call site] 00232
14 FLAGS_SET [function] [call site] 00233
14 fd_verify_regular [function] [call site] 00234
14 fd_reopen [function] [call site] 00247
15 FLAGS_SET [function] [call site] 00250
15 FLAGS_SET [function] [call site] 00251
15 FLAGS_SET [function] [call site] 00252
15 RET_NERRNO [function] [call site] 00253
15 proc_fd_enoent_errno [function] [call site] 00255
16 proc_mounted [function] [call site] 00256
14 FLAGS_SET [function] [call site] 00257
14 FLAGS_SET [function] [call site] 00258
14 FLAGS_SET [function] [call site] 00261
14 FLAGS_SET [function] [call site] 00262
14 FLAGS_SET [function] [call site] 00263
14 btrfs_subvol_make_fallback [function] [call site] 00264
15 btrfs_subvol_make [function] [call site] 00268
16 extract_subvolume_name [function] [call site] 00272
17 path_extract_filename [function] [call site] 00275
18 path_is_valid [function] [call site] 00276
19 path_is_valid_full [function] [call site] 00277
20 path_find_first_component [function] [call site] 00279
21 skip_slash_or_dot [function] [call site] 00281
22 startswith [function] [call site] 00283
21 strchrnul [function] [call site] 00286
21 skip_slash_or_dot [function] [call site] 00287
18 path_find_last_component [function] [call site] 00289
19 skip_slash_or_dot_backward [function] [call site] 00294
19 PTR_SUB1 [function] [call site] 00299
19 skip_slash_or_dot_backward [function] [call site] 00301
18 TAKE_PTR [function] [call site] 00303
17 btrfs_validate_subvolume_name [function] [call site] 00305
18 filename_is_valid [function] [call site] 00306
19 dot_or_dot_dot [function] [call site] 00308
19 filename_part_is_valid [function] [call site] 00309
20 strchrnul [function] [call site] 00310
17 TAKE_PTR [function] [call site] 00312
16 path_extract_directory [function] [call site] 00313
17 path_find_last_component [function] [call site] 00314
17 strdup_to [function] [call site] 00316
17 path_simplify [function] [call site] 00318
18 path_simplify_full [function] [call site] 00319
19 FLAGS_SET [function] [call site] 00321
19 path_is_absolute [function] [call site] 00328
19 path_find_first_component [function] [call site] 00329
19 path_startswith [function] [call site] 00330
20 path_startswith_full [function] [call site] 00331
21 path_find_first_component [function] [call site] 00334
21 FLAGS_SET [function] [call site] 00335
21 path_find_first_component [function] [call site] 00336
21 FLAGS_SET [function] [call site] 00337
21 FLAGS_SET [function] [call site] 00338
17 path_is_valid [function] [call site] 00343
17 TAKE_PTR [function] [call site] 00344
16 fd_reopen_condition [function] [call site] 00345
16 RET_NERRNO [function] [call site] 00353
15 ERRNO_IS_NOT_SUPPORTED [function] [call site] 00356
14 RET_NERRNO [function] [call site] 00358
14 FLAGS_SET [function] [call site] 00360
14 FLAGS_SET [function] [call site] 00361
14 FLAGS_SET [function] [call site] 00362
14 fd_verify_regular [function] [call site] 00364
14 FLAGS_SET [function] [call site] 00365
14 FLAGS_SET [function] [call site] 00368
14 fd_verify_regular [function] [call site] 00370
14 fd_reopen [function] [call site] 00371
14 openat_report_new [function] [call site] 00372
14 label_ops_post [function] [call site] 00379
14 FLAGS_SET [function] [call site] 00381
14 chattr_fd [function] [call site] 00382
15 chattr_full [function] [call site] 00383
16 ERRNO_IS_IOCTL_NOT_SUPPORTED [function] [call site] 00392
16 FLAGS_SET [function] [call site] 00393
16 UPDATE_FLAG [function] [call site] 00394
16 FLAGS_SET [function] [call site] 00395
16 ERRNO_IS_IOCTL_NOT_SUPPORTED [function] [call site] 00397
16 log_full_errno [function] [call site] 00398
16 FLAGS_SET [function] [call site] 00399
16 ERRNO_IS_IOCTL_NOT_SUPPORTED [function] [call site] 00401
16 ERRNO_IS_IOCTL_NOT_SUPPORTED [function] [call site] 00403
14 ERRNO_IS_IOCTL_NOT_SUPPORTED [function] [call site] 00404
14 label_ops_post [function] [call site] 00406
14 unlinkat [function] [call site] 00407
12 RET_NERRNO [function] [call site] 00408
11 is_fs_type [function] [call site] 00410
12 assert_cc [function] [call site] 00412
12 F_TYPE_EQUAL [function] [call site] 00413
8 read_line [function] [call site] 00414
7 log_debug_errno [function] [call site] 00415
7 parse_pid [function] [call site] 00417
7 log_debug_errno [function] [call site] 00418
7 procfs_file_alloca [function] [call site] 00419
7 read_one_line_file [function] [call site] 00420
7 log_debug_errno [function] [call site] 00421
7 startswith [function] [call site] 00422
7 read_one_line_file [function] [call site] 00423
7 log_debug_errno [function] [call site] 00425
7 getpid_cached [function] [call site] 00426
7 read_one_line_file [function] [call site] 00429
7 log_debug_errno [function] [call site] 00431
7 getenv_for_pid [function] [call site] 00432
8 getpid_cached [function] [call site] 00436
8 strdup_to_full [function] [call site] 00437
8 pid_is_valid [function] [call site] 00439
8 procfs_file_alloca [function] [call site] 00440
8 fopen_unlocked [function] [call site] 00441
8 read_nul_string [function] [call site] 00442
9 read_line_full [function] [call site] 00443
8 startswith [function] [call site] 00444
8 strdup_to_full [function] [call site] 00445
7 log_debug_errno [function] [call site] 00446
7 detect_container_files [function] [call site] 00447
8 log_debug_errno [function] [call site] 00449
7 running_in_pidns [function] [call site] 00450
8 log_debug_errno [function] [call site] 00457
7 log_debug [function] [call site] 00458
7 detect_container_files [function] [call site] 00460
7 container_from_string [function] [call site] 00461
7 log_debug [function] [call site] 00462
7 virtualization_to_string [function] [call site] 00463
6 pid_get_cmdline_strv [function] [call site] 00464
7 pid_get_cmdline_nulstr [function] [call site] 00468
8 procfs_file_alloca [function] [call site] 00469
6 proc_cmdline_filter_pid1_args [function] [call site] 00544
7 STRV_FOREACH [function] [call site] 00549
7 strv_skip [function] [call site] 00550
8 strv_isempty [function] [call site] 00551
8 strv_isempty [function] [call site] 00552
7 strv_extend [function] [call site] 00553
8 strv_extend_with_size [function] [call site] 00554
9 strv_consume_with_size [function] [call site] 00556
10 strv_push_with_size [function] [call site] 00557
11 strv_length [function] [call site] 00558
12 STRV_FOREACH [function] [call site] 00559
7 strv_extend_strv [function] [call site] 00561
7 strv_skip [function] [call site] 00573
6 read_full_file [function] [call site] 00577
7 read_full_file_full [function] [call site] 00578
8 FLAGS_SET [function] [call site] 00581
8 xfopenat_full [function] [call site] 00582
8 read_full_stream_full [function] [call site] 00583
9 FLAGS_SET [function] [call site] 00587
9 FLAGS_SET [function] [call site] 00589
9 FLAGS_SET [function] [call site] 00593
9 warn_file_is_world_accessible [function] [call site] 00594
10 log_syntax [function] [call site] 00596
10 log_warning [function] [call site] 00597
9 FLAGS_SET [function] [call site] 00598
9 FLAGS_SET [function] [call site] 00600
9 memcpy_safe [function] [call site] 00602
9 explicit_bzero_safe [function] [call site] 00603
10 explicit_bzero [function] [call site] 00604
9 MALLOC_SIZEOF_SAFE [function] [call site] 00607
9 errno_or_else [function] [call site] 00611
9 FLAGS_SET [function] [call site] 00613
9 FLAGS_SET [function] [call site] 00616
9 unbase64mem_full [function] [call site] 00618
10 CLEANUP_ERASE_PTR [function] [call site] 00622
10 unbase64_next [function] [call site] 00631
10 unbase64_next [function] [call site] 00632
10 unbase64_next [function] [call site] 00633
10 TAKE_PTR [function] [call site] 00635
9 explicit_bzero_safe [function] [call site] 00649
9 free_and_replace [function] [call site] 00650
9 FLAGS_SET [function] [call site] 00651
9 explicit_bzero_safe [function] [call site] 00654
6 strv_split_full [function] [call site] 00655
4 log_parse_environment_variables [function] [call site] 00692
5 log_set_target_from_string [function] [call site] 00694
6 log_target_from_string [function] [call site] 00695
6 log_set_target [function] [call site] 00696
5 log_warning [function] [call site] 00697
5 log_set_max_level_from_string [function] [call site] 00699
6 extract_first_word [function] [call site] 00700
6 log_level_from_string [function] [call site] 00702
6 log_set_max_level [function] [call site] 00703
6 log_target_from_string [function] [call site] 00705
6 log_level_from_string [function] [call site] 00706
5 log_warning_errno [function] [call site] 00707
5 getenv_bool [function] [call site] 00708
6 parse_boolean [function] [call site] 00710
5 log_warning_errno [function] [call site] 00711
5 log_set_max_level [function] [call site] 00712
5 log_show_color_from_string [function] [call site] 00714
6 parse_boolean [function] [call site] 00715
6 log_show_color [function] [call site] 00716
5 log_warning [function] [call site] 00717
5 log_show_location_from_string [function] [call site] 00719
6 parse_boolean [function] [call site] 00720
6 log_show_location [function] [call site] 00721
5 log_warning [function] [call site] 00722
5 log_show_time_from_string [function] [call site] 00724
6 parse_boolean [function] [call site] 00725
6 log_show_time [function] [call site] 00726
5 log_warning [function] [call site] 00727
5 log_show_tid_from_string [function] [call site] 00729
6 parse_boolean [function] [call site] 00730
6 log_show_tid [function] [call site] 00731
5 log_warning [function] [call site] 00732
5 log_set_ratelimit_kmsg_from_string [function] [call site] 00734
6 parse_boolean [function] [call site] 00735
5 log_warning [function] [call site] 00736
3 log_open [function] [call site] 00737
4 log_close_syslog [function] [call site] 00745
4 log_close_console [function] [call site] 00748
5 safe_close_above_stdio [function] [call site] 00749
6 safe_close [function] [call site] 00750
4 getpid_cached [function] [call site] 00752
4 stderr_is_journal [function] [call site] 00753
5 extract_first_word [function] [call site] 00755
5 safe_atou64 [function] [call site] 00756
6 assert_cc [function] [call site] 00757
6 safe_atollu [function] [call site] 00758
7 safe_atollu_full [function] [call site] 00759
5 safe_atou64 [function] [call site] 00772
4 log_open_journal [function] [call site] 00776
5 create_log_socket [function] [call site] 00777
6 fd_inc_sndbuf [function] [call site] 00785
7 fd_set_sndbuf [function] [call site] 00786
8 getsockopt [function] [call site] 00787
8 setsockopt_int [function] [call site] 00788
9 setsockopt [function] [call site] 00789
8 getsockopt [function] [call site] 00790
8 setsockopt_int [function] [call site] 00791
6 getpid_cached [function] [call site] 00792
6 timeval_store [function] [call site] 00793
6 timeval_store [function] [call site] 00795
6 setsockopt [function] [call site] 00796
5 connect_unix_path [function] [call site] 00797
5 log_close_journal [function] [call site] 00798
4 log_close_syslog [function] [call site] 00799
4 log_close_console [function] [call site] 00800
4 log_open_syslog [function] [call site] 00802
5 create_log_socket [function] [call site] 00803
5 connect_unix_path [function] [call site] 00804
5 safe_close [function] [call site] 00805
5 create_log_socket [function] [call site] 00806
5 connect_unix_path [function] [call site] 00807
5 log_close_syslog [function] [call site] 00808
4 log_close_journal [function] [call site] 00809
4 log_close_console [function] [call site] 00810
4 log_open_kmsg [function] [call site] 00812
5 fd_move_above_stdio [function] [call site] 00814
4 log_close_journal [function] [call site] 00815
4 log_close_syslog [function] [call site] 00816
4 log_close_console [function] [call site] 00817
4 log_close_journal [function] [call site] 00818
4 log_close_syslog [function] [call site] 00819
4 log_open_console [function] [call site] 00820
5 open_terminal [function] [call site] 00821
6 usleep_safe [function] [call site] 00824
7 clock_nanosleep [function] [call site] 00825
7 TIMESPEC_STORE [function] [call site] 00826
6 isatty_safe [function] [call site] 00827
5 fd_move_above_stdio [function] [call site] 00829
3 log_on_console [function] [call site] 00830
3 log_show_color [function] [call site] 00832
1 settings_load [function] [call site] 00833
2 _cleanup_ [function] [call site] 00834
2 settings_new [function] [call site] 00837
2 config_parse [function] [call site] 00838
3 log_full_errno [function] [call site] 00842
3 log_full_errno [function] [call site] 00845
3 FLAGS_SET [function] [call site] 00846
3 stat_warn_permissions [function] [call site] 00847
3 read_line [function] [call site] 00855
3 log_error_errno [function] [call site] 00856
3 FLAGS_SET [function] [call site] 00857
3 log_error_errno [function] [call site] 00858
3 skip_leading_chars [function] [call site] 00859
3 startswith [function] [call site] 00862
3 log_error [function] [call site] 00865
4 sd_journal_print [function] [call site] 00866
5 sd_journal_printv [function] [call site] 00868
6 assert_return [function] [call site] 00869
6 assert_return [function] [call site] 00870
6 assert_return [function] [call site] 00871
6 vsnprintf [function] [call site] 00875
6 alloca_safe [function] [call site] 00877
6 assert_se [function] [call site] 00879
6 vsnprintf [function] [call site] 00880
6 strstrip [function] [call site] 00881
7 delete_trailing_chars [function] [call site] 00882
7 skip_leading_chars [function] [call site] 00884
6 IOVEC_MAKE_STRING [function] [call site] 00886
6 IOVEC_MAKE_STRING [function] [call site] 00887
6 sd_journal_sendv [function] [call site] 00888
7 assert_return [function] [call site] 00893
7 assert_return [function] [call site] 00894
7 _unlikely_ [function] [call site] 00897
7 _unlikely_ [function] [call site] 00899
7 startswith [function] [call site] 00900
7 _unlikely_ [function] [call site] 00902
7 IOVEC_MAKE [function] [call site] 00903
7 IOVEC_MAKE_STRING [function] [call site] 00904
7 htole64 [function] [call site] 00905
8 bswap_64_on_be [function] [call site] 00906
7 IOVEC_MAKE [function] [call site] 00907
7 IOVEC_MAKE [function] [call site] 00908
7 IOVEC_MAKE_STRING [function] [call site] 00909
7 string_is_safe [function] [call site] 00910
7 IOVEC_MAKE_STRING [function] [call site] 00912
7 IOVEC_MAKE_STRING [function] [call site] 00913
7 IOVEC_MAKE_STRING [function] [call site] 00914
7 journal_fd [function] [call site] 00915
8 fd_inc_sndbuf [function] [call site] 00917
8 __atomic_compare_exchange_n [function] [call site] 00918
8 safe_close [function] [call site] 00919
7 _unlikely_ [function] [call site] 00920
7 memfd_new_full [function] [call site] 00923
8 assert_se [function] [call site] 00924
8 utf8_escape_invalid [function] [call site] 00927
9 utf8_encoded_valid_unichar [function] [call site] 00931
10 utf8_encoded_expected_len [function] [call site] 00934
10 utf8_encoded_to_unichar [function] [call site] 00935
11 utf8_encoded_expected_len [function] [call site] 00937
10 utf8_unichar_to_encoded_len [function] [call site] 00938
10 unichar_is_valid [function] [call site] 00939
8 memfd_create_wrapper [function] [call site] 00947
9 RET_NERRNO [function] [call site] 00949
9 memfd_create [function] [call site] 00950
9 RET_NERRNO [function] [call site] 00951
9 memfd_create [function] [call site] 00952
7 memfd_set_sealed [function] [call site] 00954
7 send_one_fd_sa [function] [call site] 00959
3 strextend [function] [call site] 00970
3 parse_line [function] [call site] 00974
4 utf8_is_valid [function] [call site] 00981
5 utf8_is_valid_n [function] [call site] 00982
6 _unlikely_ [function] [call site] 00984
6 utf8_encoded_valid_unichar [function] [call site] 00985
6 _unlikely_ [function] [call site] 00986
4 log_syntax_invalid_utf8 [function] [call site] 00987
4 log_syntax [function] [call site] 00990
4 SYNTHETIC_ERRNO [function] [call site] 00991
4 string_is_safe [function] [call site] 00994
4 log_syntax [function] [call site] 00995
4 SYNTHETIC_ERRNO [function] [call site] 00996
4 nulstr_contains [function] [call site] 00997
5 nulstr_get [function] [call site] 00998
6 NULSTR_FOREACH [function] [call site] 00999
4 startswith [function] [call site] 01001
4 NULSTR_FOREACH [function] [call site] 01002
4 startswith [function] [call site] 01007
4 log_syntax [function] [call site] 01008
4 free_and_replace [function] [call site] 01010
4 log_syntax [function] [call site] 01011
4 log_syntax [function] [call site] 01013
4 log_syntax [function] [call site] 01014
3 log_warning_errno [function] [call site] 01029
3 parse_line [function] [call site] 01031
3 log_warning_errno [function] [call site] 01032