Fuzz introspector: /src/tinyusb/test/fuzz/device/msc/src/fuzz.cc
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
6 87 tud_task_ext call site: 00087 usbd_control_xfer_cb
5 72 process_get_status call site: 00072 process_get_status
4 45 tud_control_xfer call site: 00045 configuration_reset
2 11 dcd_int_handler call site: 00011 tu_fifo_write_n_access_mode
2 15 tu_fifo_write_n_access_mode call site: 00015 tud_event_hook_cb
2 51 process_set_config call site: 00051 tu_bind_driver_to_ep_itf
2 83 usbd_edpt_stall call site: 00083 invoke_class_control
1 19 dcd_int_handler call site: 00019 dcd_event_handler
1 22 tud_task_ext call site: 00022 tu_fifo_read_n_access_mode
1 24 tu_fifo_read_n_access_mode call site: 00024 correct_read_index
1 28 tud_task_ext call site: 00028 usbd_reset
1 36 process_setup_received call site: 00036 invoke_class_control

Fuzzer calltree

0 LLVMFuzzerTestOneInput [function] [call site] 00000
1 fuzz_init [function] [call site] 00001
1 tusb_rhport_init [function] [call site] 00002
2 tud_rhport_init [function] [call site] 00003
3 tud_inited [function] [call site] 00004
3 tu_fifo_clear [function] [call site] 00005
3 usbd_app_driver_get_cb [function] [call site] 00006
3 dcd_init [function] [call site] 00007
3 dcd_int_enable [function] [call site] 00008
1 dcd_int_handler [function] [call site] 00009
2 __assert_fail [call site] 00010
2 dcd_event_handler [function] [call site] 00011
3 tu_fifo_write_n_access_mode [function] [call site] 00012
4 advance_index [function] [call site] 00013
4 ff_push_n [function] [call site] 00014
4 advance_index [function] [call site] 00015
3 tud_event_hook_cb [function] [call site] 00016
3 tud_event_hook_cb [function] [call site] 00017
3 tud_event_hook_cb [function] [call site] 00018
2 dcd_event_handler [function] [call site] 00019
2 dcd_event_handler [function] [call site] 00020
1 tud_task_ext [function] [call site] 00021
2 tud_inited [function] [call site] 00022
2 tu_fifo_read_n_access_mode [function] [call site] 00023
3 tu_fifo_peek_n_access_mode [function] [call site] 00024
4 correct_read_index [function] [call site] 00025
4 ff_pull_n [function] [call site] 00026
3 advance_index [function] [call site] 00027
2 run_after_queue_call [function] [call site] 00028
2 usbd_reset [function] [call site] 00029
3 configuration_reset [function] [call site] 00030
2 usbd_reset [function] [call site] 00031
2 usbd_reset [function] [call site] 00032
2 tud_umount_cb [function] [call site] 00033
2 dcd_edpt0_setup_begin [function] [call site] 00034
2 process_setup_received [function] [call site] 00035
3 tud_vendor_control_xfer_cb [function] [call site] 00036
3 invoke_class_control [function] [call site] 00037
3 process_std_device_request [function] [call site] 00038
4 dcd_set_address [function] [call site] 00039
5 dcd_edpt_xfer [function] [call site] 00040
4 tud_control_xfer [function] [call site] 00041
5 data_stage_xact [function] [call site] 00042
6 usbd_edpt_xfer [function] [call site] 00043
7 dcd_edpt_xfer [function] [call site] 00044
5 usbd_edpt_xfer [function] [call site] 00045
4 dcd_sof_enable [function] [call site] 00046
4 dcd_edpt_close_all [function] [call site] 00047
4 configuration_reset [function] [call site] 00048
4 tud_umount_cb [function] [call site] 00049
4 process_set_config [function] [call site] 00050
5 tud_descriptor_configuration_cb [function] [call site] 00051
5 tu_bind_driver_to_ep_itf [function] [call site] 00052
4 tud_mount_cb [function] [call site] 00053
4 tud_control_status [function] [call site] 00054
5 usbd_edpt_xfer [function] [call site] 00055
4 process_get_descriptor [function] [call site] 00056
5 tud_descriptor_device_cb [function] [call site] 00057
5 tud_control_xfer [function] [call site] 00058
5 tud_descriptor_bos_cb [function] [call site] 00059
5 tud_control_xfer [function] [call site] 00060
5 tud_descriptor_configuration_cb [function] [call site] 00061
5 tud_descriptor_other_speed_configuration_cb [function] [call site] 00062
5 tud_control_xfer [function] [call site] 00063
5 tud_descriptor_string_cb [function] [call site] 00064
6 strlen [call site] 00065
5 tud_control_xfer [function] [call site] 00066
5 tud_descriptor_device_qualifier_cb [function] [call site] 00067
5 tud_control_xfer [function] [call site] 00068
4 tud_control_status [function] [call site] 00069
4 tud_control_status [function] [call site] 00070
4 process_get_status [function] [call site] 00071
5 tud_control_xfer [function] [call site] 00072
3 invoke_class_control [function] [call site] 00073
3 tud_control_xfer [function] [call site] 00074
3 tud_control_status [function] [call site] 00075
3 process_get_status [function] [call site] 00076
3 invoke_class_control [function] [call site] 00077
3 usbd_edpt_stalled [function] [call site] 00078
3 process_get_status [function] [call site] 00079
3 usbd_edpt_clear_stall [function] [call site] 00080
4 dcd_edpt_clear_stall [function] [call site] 00081
3 usbd_edpt_stall [function] [call site] 00082
4 dcd_edpt_stall [function] [call site] 00083
3 invoke_class_control [function] [call site] 00084
3 tud_control_status [function] [call site] 00085
2 dcd_edpt_stall [function] [call site] 00086
2 dcd_edpt_stall [function] [call site] 00087
2 usbd_control_xfer_cb [function] [call site] 00088
3 dcd_edpt0_status_complete [function] [call site] 00089
3 usbd_edpt_xfer [function] [call site] 00090
3 dcd_edpt_stall [function] [call site] 00091
3 dcd_edpt_stall [function] [call site] 00092
3 data_stage_xact [function] [call site] 00093
2 tud_suspend_cb [function] [call site] 00094
2 tud_resume_cb [function] [call site] 00095
2 tud_sof_cb [function] [call site] 00096