Fuzz introspector: fuzz-env-file
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
411 127 startswith call site: {node_id} pid_get_cmdline_strv
95 28 should_parse_proc_cmdline call site: {node_id} proc_cmdline_parse
43 773 log_open call site: {node_id} log_open_syslog
38 652 read_full_stream_full call site: {node_id} strv_split_full
34 616 read_full_stream_full call site: {node_id} unbase64mem_full
24 558 strv_length call site: {node_id} read_full_file
19 753 stderr_is_journal call site: {node_id} extract_first_word
12 540 memcpy_safe call site: {node_id} proc_cmdline_filter_pid1_args
9 697 log_parse_environment_variables call site: {node_id} log_set_max_level_from_string
9 819 log_open call site: {node_id} open_terminal
7 589 read_full_stream_full call site: {node_id} warn_file_is_world_accessible
5 599 read_full_stream_full call site: {node_id} memcpy_safe

Fuzzer calltree

0 LLVMFuzzerTestOneInput [function] [call site] 00000
1 outside_size_range [function] [call site] 00001
1 data_to_file [function] [call site] 00002
2 fmemopen_unlocked [function] [call site] 00004
3 __fsetlocking [function] [call site] 00006
1 assert_se [function] [call site] 00007
1 fuzz_setup_logging [function] [call site] 00008
2 log_set_assert_return_is_critical [function] [call site] 00009
2 log_set_max_level [function] [call site] 00010
3 log_level_is_valid [function] [call site] 00012
3 setlogmask [function] [call site] 00013
3 assert_cc [function] [call site] 00015
2 log_setup [function] [call site] 00017
3 log_parse_environment [function] [call site] 00021
4 should_parse_proc_cmdline [function] [call site] 00022
5 getpid_cached [function] [call site] 00023
6 __atomic_compare_exchange_n [function] [call site] 00024
6 pthread_atfork [function] [call site] 00026
5 invoked_by_systemd [function] [call site] 00028
6 parse_pid [function] [call site] 00030
7 safe_atolu [function] [call site] 00032
8 safe_atolu_full [function] [call site] 00033
9 assert_cc [function] [call site] 00034
9 safe_atou_full [function] [call site] 00035
10 SAFE_ATO_MASK_FLAGS [function] [call site] 00038
10 FLAGS_SET [function] [call site] 00039
10 FLAGS_SET [function] [call site] 00042
10 FLAGS_SET [function] [call site] 00044
10 mangle_base [function] [call site] 00046
11 SAFE_ATO_MASK_FLAGS [function] [call site] 00049
11 STARTSWITH_SET [function] [call site] 00050
11 STARTSWITH_SET [function] [call site] 00051
10 SAFE_ATO_MASK_FLAGS [function] [call site] 00053
7 pid_is_valid [function] [call site] 00054
6 log_debug_errno [function] [call site] 00055
6 getpid_cached [function] [call site] 00056
4 proc_cmdline_parse [function] [call site] 00057
5 proc_cmdline_strv_internal [function] [call site] 00060
6 secure_getenv [function] [call site] 00062
6 detect_container [function] [call site] 00099
7 log_debug_errno [function] [call site] 00101
7 log_debug_errno [function] [call site] 00103
7 read_one_line_file [function] [call site] 00104
8 read_one_line_file_at [function] [call site] 00105
9 fopen_unlocked_at [function] [call site] 00109
10 xfopenat_full [function] [call site] 00110
11 FLAGS_SET [function] [call site] 00137
11 xfopenat_unix_socket [function] [call site] 00138
12 connect_unix_path [function] [call site] 00154
13 connect_unix_inode [function] [call site] 00157
14 connect_unix_path_simple [function] [call site] 00160
14 FORMAT_PROC_FD_PATH [function] [call site] 00171
13 sizeof_field [function] [call site] 00174
13 connect_unix_path_simple [function] [call site] 00175
13 connect_unix_inode [function] [call site] 00177
12 shutdown [function] [call site] 00178
12 take_fdopen [function] [call site] 00179
11 FLAGS_SET [function] [call site] 00181
11 __fsetlocking [function] [call site] 00182
7 log_debug_errno [function] [call site] 00208
7 get_proc_field [function] [call site] 00211
8 fopen_unlocked [function] [call site] 00214
9 fopen_unlocked_at [function] [call site] 00215
8 proc_mounted [function] [call site] 00216
9 path_is_fs_type [function] [call site] 00217
10 is_fs_type_at [function] [call site] 00218
11 xstatfsat [function] [call site] 00219
12 xopenat [function] [call site] 00223
13 xopenat_full [function] [call site] 00224
14 FLAGS_SET [function] [call site] 00227
14 FLAGS_SET [function] [call site] 00228
14 FLAGS_SET [function] [call site] 00231
14 FLAGS_SET [function] [call site] 00232
14 fd_verify_regular [function] [call site] 00233
14 fd_reopen [function] [call site] 00246
15 FLAGS_SET [function] [call site] 00249
15 FLAGS_SET [function] [call site] 00250
15 FLAGS_SET [function] [call site] 00251
15 RET_NERRNO [function] [call site] 00252
15 proc_fd_enoent_errno [function] [call site] 00254
16 proc_mounted [function] [call site] 00255
14 FLAGS_SET [function] [call site] 00256
14 FLAGS_SET [function] [call site] 00257
14 FLAGS_SET [function] [call site] 00260
14 FLAGS_SET [function] [call site] 00261
14 FLAGS_SET [function] [call site] 00262
14 btrfs_subvol_make_fallback [function] [call site] 00263
15 btrfs_subvol_make [function] [call site] 00267
16 extract_subvolume_name [function] [call site] 00271
17 path_extract_filename [function] [call site] 00274
18 path_is_valid [function] [call site] 00275
19 path_is_valid_full [function] [call site] 00276
20 path_find_first_component [function] [call site] 00278
21 skip_slash_or_dot [function] [call site] 00280
22 startswith [function] [call site] 00282
21 strchrnul [function] [call site] 00285
21 skip_slash_or_dot [function] [call site] 00286
18 path_find_last_component [function] [call site] 00288
19 skip_slash_or_dot_backward [function] [call site] 00293
19 PTR_SUB1 [function] [call site] 00298
19 skip_slash_or_dot_backward [function] [call site] 00300
18 TAKE_PTR [function] [call site] 00302
17 btrfs_validate_subvolume_name [function] [call site] 00304
18 filename_is_valid [function] [call site] 00305
19 dot_or_dot_dot [function] [call site] 00307
19 filename_part_is_valid [function] [call site] 00308
20 strchrnul [function] [call site] 00309
17 TAKE_PTR [function] [call site] 00311
16 path_extract_directory [function] [call site] 00312
17 path_find_last_component [function] [call site] 00313
17 strdup_to [function] [call site] 00315
17 path_simplify [function] [call site] 00317
18 path_simplify_full [function] [call site] 00318
19 FLAGS_SET [function] [call site] 00320
19 path_is_absolute [function] [call site] 00327
19 path_find_first_component [function] [call site] 00328
19 path_startswith [function] [call site] 00329
20 path_startswith_full [function] [call site] 00330
21 path_find_first_component [function] [call site] 00333
21 FLAGS_SET [function] [call site] 00334
21 path_find_first_component [function] [call site] 00335
21 FLAGS_SET [function] [call site] 00336
21 FLAGS_SET [function] [call site] 00337
17 path_is_valid [function] [call site] 00342
17 TAKE_PTR [function] [call site] 00343
16 fd_reopen_condition [function] [call site] 00344
16 RET_NERRNO [function] [call site] 00352
15 ERRNO_IS_NOT_SUPPORTED [function] [call site] 00355
14 RET_NERRNO [function] [call site] 00357
14 FLAGS_SET [function] [call site] 00359
14 FLAGS_SET [function] [call site] 00360
14 FLAGS_SET [function] [call site] 00361
14 fd_verify_regular [function] [call site] 00363
14 FLAGS_SET [function] [call site] 00364
14 FLAGS_SET [function] [call site] 00367
14 fd_verify_regular [function] [call site] 00369
14 fd_reopen [function] [call site] 00370
14 openat_report_new [function] [call site] 00371
14 label_ops_post [function] [call site] 00378
14 FLAGS_SET [function] [call site] 00380
14 chattr_fd [function] [call site] 00381
15 chattr_full [function] [call site] 00382
16 ERRNO_IS_IOCTL_NOT_SUPPORTED [function] [call site] 00391
16 FLAGS_SET [function] [call site] 00392
16 UPDATE_FLAG [function] [call site] 00393
16 FLAGS_SET [function] [call site] 00394
16 ERRNO_IS_IOCTL_NOT_SUPPORTED [function] [call site] 00396
16 log_full_errno [function] [call site] 00397
16 FLAGS_SET [function] [call site] 00398
16 ERRNO_IS_IOCTL_NOT_SUPPORTED [function] [call site] 00400
16 ERRNO_IS_IOCTL_NOT_SUPPORTED [function] [call site] 00402
14 ERRNO_IS_IOCTL_NOT_SUPPORTED [function] [call site] 00403
14 label_ops_post [function] [call site] 00405
14 unlinkat [function] [call site] 00406
12 RET_NERRNO [function] [call site] 00407
11 is_fs_type [function] [call site] 00409
12 assert_cc [function] [call site] 00411
12 F_TYPE_EQUAL [function] [call site] 00412
8 read_line [function] [call site] 00413
7 log_debug_errno [function] [call site] 00414
7 parse_pid [function] [call site] 00416
7 log_debug_errno [function] [call site] 00417
7 procfs_file_alloca [function] [call site] 00418
7 read_one_line_file [function] [call site] 00419
7 log_debug_errno [function] [call site] 00420
7 startswith [function] [call site] 00421
7 read_one_line_file [function] [call site] 00422
7 log_debug_errno [function] [call site] 00424
7 getpid_cached [function] [call site] 00425
7 read_one_line_file [function] [call site] 00428
7 log_debug_errno [function] [call site] 00430
7 getenv_for_pid [function] [call site] 00431
8 getpid_cached [function] [call site] 00435
8 strdup_to_full [function] [call site] 00436
8 pid_is_valid [function] [call site] 00438
8 procfs_file_alloca [function] [call site] 00439
8 fopen_unlocked [function] [call site] 00440
8 read_nul_string [function] [call site] 00441
9 read_line_full [function] [call site] 00442
8 startswith [function] [call site] 00443
8 strdup_to_full [function] [call site] 00444
7 log_debug_errno [function] [call site] 00445
7 detect_container_files [function] [call site] 00446
8 log_debug_errno [function] [call site] 00448
7 running_in_pidns [function] [call site] 00449
8 log_debug_errno [function] [call site] 00456
7 log_debug [function] [call site] 00457
7 detect_container_files [function] [call site] 00459
7 container_from_string [function] [call site] 00460
7 log_debug [function] [call site] 00461
7 virtualization_to_string [function] [call site] 00462
6 pid_get_cmdline_strv [function] [call site] 00463
7 pid_get_cmdline_nulstr [function] [call site] 00467
8 procfs_file_alloca [function] [call site] 00468
6 proc_cmdline_filter_pid1_args [function] [call site] 00543
7 STRV_FOREACH [function] [call site] 00548
7 strv_skip [function] [call site] 00549
8 strv_isempty [function] [call site] 00550
8 strv_isempty [function] [call site] 00551
7 strv_extend [function] [call site] 00552
8 strv_extend_with_size [function] [call site] 00553
9 strv_consume_with_size [function] [call site] 00555
10 strv_push_with_size [function] [call site] 00556
11 strv_length [function] [call site] 00557
12 STRV_FOREACH [function] [call site] 00558
7 strv_extend_strv [function] [call site] 00560
7 strv_skip [function] [call site] 00572
6 read_full_file [function] [call site] 00576
7 read_full_file_full [function] [call site] 00577
8 FLAGS_SET [function] [call site] 00580
8 xfopenat_full [function] [call site] 00581
8 read_full_stream_full [function] [call site] 00582
9 FLAGS_SET [function] [call site] 00586
9 FLAGS_SET [function] [call site] 00588
9 FLAGS_SET [function] [call site] 00592
9 warn_file_is_world_accessible [function] [call site] 00593
10 log_syntax [function] [call site] 00595
10 log_warning [function] [call site] 00596
9 FLAGS_SET [function] [call site] 00597
9 FLAGS_SET [function] [call site] 00599
9 memcpy_safe [function] [call site] 00601
9 explicit_bzero_safe [function] [call site] 00602
10 explicit_bzero [function] [call site] 00603
9 MALLOC_SIZEOF_SAFE [function] [call site] 00606
9 errno_or_else [function] [call site] 00610
9 FLAGS_SET [function] [call site] 00612
9 FLAGS_SET [function] [call site] 00615
9 unbase64mem_full [function] [call site] 00617
10 CLEANUP_ERASE_PTR [function] [call site] 00621
10 unbase64_next [function] [call site] 00630
10 unbase64_next [function] [call site] 00631
10 unbase64_next [function] [call site] 00632
10 TAKE_PTR [function] [call site] 00634
9 explicit_bzero_safe [function] [call site] 00648
9 free_and_replace [function] [call site] 00649
9 FLAGS_SET [function] [call site] 00650
9 explicit_bzero_safe [function] [call site] 00653
6 strv_split_full [function] [call site] 00654
4 log_parse_environment_variables [function] [call site] 00691
5 log_set_target_from_string [function] [call site] 00693
6 log_target_from_string [function] [call site] 00694
6 log_set_target [function] [call site] 00695
5 log_warning [function] [call site] 00696
5 log_set_max_level_from_string [function] [call site] 00698
6 extract_first_word [function] [call site] 00699
6 log_level_from_string [function] [call site] 00701
6 log_set_max_level [function] [call site] 00702
6 log_target_from_string [function] [call site] 00704
6 log_level_from_string [function] [call site] 00705
5 log_warning_errno [function] [call site] 00706
5 getenv_bool [function] [call site] 00707
6 parse_boolean [function] [call site] 00709
5 log_warning_errno [function] [call site] 00710
5 log_set_max_level [function] [call site] 00711
5 log_show_color_from_string [function] [call site] 00713
6 parse_boolean [function] [call site] 00714
6 log_show_color [function] [call site] 00715
5 log_warning [function] [call site] 00716
5 log_show_location_from_string [function] [call site] 00718
6 parse_boolean [function] [call site] 00719
6 log_show_location [function] [call site] 00720
5 log_warning [function] [call site] 00721
5 log_show_time_from_string [function] [call site] 00723
6 parse_boolean [function] [call site] 00724
6 log_show_time [function] [call site] 00725
5 log_warning [function] [call site] 00726
5 log_show_tid_from_string [function] [call site] 00728
6 parse_boolean [function] [call site] 00729
6 log_show_tid [function] [call site] 00730
5 log_warning [function] [call site] 00731
5 log_set_ratelimit_kmsg_from_string [function] [call site] 00733
6 parse_boolean [function] [call site] 00734
5 log_warning [function] [call site] 00735
3 log_open [function] [call site] 00736
4 log_close_syslog [function] [call site] 00744
4 log_close_console [function] [call site] 00747
5 safe_close_above_stdio [function] [call site] 00748
6 safe_close [function] [call site] 00749
4 getpid_cached [function] [call site] 00751
4 stderr_is_journal [function] [call site] 00752
5 extract_first_word [function] [call site] 00754
5 safe_atou64 [function] [call site] 00755
6 assert_cc [function] [call site] 00756
6 safe_atollu [function] [call site] 00757
7 safe_atollu_full [function] [call site] 00758
5 safe_atou64 [function] [call site] 00771
4 log_open_journal [function] [call site] 00775
5 create_log_socket [function] [call site] 00776
6 fd_inc_sndbuf [function] [call site] 00784
7 fd_set_sndbuf [function] [call site] 00785
8 getsockopt [function] [call site] 00786
8 setsockopt_int [function] [call site] 00787
9 setsockopt [function] [call site] 00788
8 getsockopt [function] [call site] 00789
8 setsockopt_int [function] [call site] 00790
6 getpid_cached [function] [call site] 00791
6 timeval_store [function] [call site] 00792
6 timeval_store [function] [call site] 00794
6 setsockopt [function] [call site] 00795
5 connect_unix_path [function] [call site] 00796
5 log_close_journal [function] [call site] 00797
4 log_close_syslog [function] [call site] 00798
4 log_close_console [function] [call site] 00799
4 log_open_syslog [function] [call site] 00801
5 create_log_socket [function] [call site] 00802
5 connect_unix_path [function] [call site] 00803
5 safe_close [function] [call site] 00804
5 create_log_socket [function] [call site] 00805
5 connect_unix_path [function] [call site] 00806
5 log_close_syslog [function] [call site] 00807
4 log_close_journal [function] [call site] 00808
4 log_close_console [function] [call site] 00809
4 log_open_kmsg [function] [call site] 00811
5 fd_move_above_stdio [function] [call site] 00813
4 log_close_journal [function] [call site] 00814
4 log_close_syslog [function] [call site] 00815
4 log_close_console [function] [call site] 00816
4 log_close_journal [function] [call site] 00817
4 log_close_syslog [function] [call site] 00818
4 log_open_console [function] [call site] 00819
5 open_terminal [function] [call site] 00820
6 usleep_safe [function] [call site] 00823
7 clock_nanosleep [function] [call site] 00824
7 TIMESPEC_STORE [function] [call site] 00825
6 isatty_safe [function] [call site] 00826
5 fd_move_above_stdio [function] [call site] 00828
3 log_on_console [function] [call site] 00829
3 log_show_color [function] [call site] 00831
1 assert_se [function] [call site] 00868
1 load_env_file_pairs [function] [call site] 00870
2 parse_env_file_internal [function] [call site] 00873