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
53 42 usbd_edpt_xfer call site: 00042 process_get_descriptor
13 28 tud_task_ext call site: 00028 process_control_request
2 13 tu_fifo_write call site: 00013 tud_event_hook_cb
1 11 dcd_int_handler call site: 00011 tu_fifo_write
1 21 tu_fifo_read call site: 00021 correct_read_index

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 [function] [call site] 00012
4 advance_index [function] [call site] 00013
3 tud_event_hook_cb [function] [call site] 00014
3 tud_event_hook_cb [function] [call site] 00015
3 tud_event_hook_cb [function] [call site] 00016
2 dcd_event_handler [function] [call site] 00017
1 tud_task_ext [function] [call site] 00018
2 tud_inited [function] [call site] 00019
2 tu_fifo_read [function] [call site] 00020
3 ff_peek_local [function] [call site] 00021
4 correct_read_index [function] [call site] 00022
3 advance_index [function] [call site] 00023
2 usbd_reset [function] [call site] 00024
3 configuration_reset [function] [call site] 00025
3 usbd_control_reset [function] [call site] 00026
2 usbd_reset [function] [call site] 00027
2 tud_umount_cb [function] [call site] 00028
2 process_control_request [function] [call site] 00029
3 usbd_control_set_complete_callback [function] [call site] 00030
3 usbd_control_set_complete_callback [function] [call site] 00031
3 tud_vendor_control_xfer_cb [function] [call site] 00032
3 tud_vendor_control_xfer_cb [function] [call site] 00033
3 invoke_class_control [function] [call site] 00034
4 usbd_control_set_complete_callback [function] [call site] 00035
3 usbd_control_set_request [function] [call site] 00036
3 dcd_set_address [function] [call site] 00037
4 dcd_edpt_xfer [function] [call site] 00038
3 tud_control_xfer [function] [call site] 00039
4 data_stage_xact [function] [call site] 00040
5 usbd_edpt_xfer [function] [call site] 00041
6 dcd_edpt_xfer [function] [call site] 00042
4 status_stage_xact [function] [call site] 00043
5 usbd_edpt_xfer [function] [call site] 00044
3 dcd_sof_enable [function] [call site] 00045
3 dcd_edpt_close_all [function] [call site] 00046
3 configuration_reset [function] [call site] 00047
3 tud_umount_cb [function] [call site] 00048
3 process_set_config [function] [call site] 00049
4 tud_descriptor_configuration_cb [function] [call site] 00050
4 tu_bind_driver_to_ep_itf [function] [call site] 00051
3 tud_mount_cb [function] [call site] 00052
3 tud_control_status [function] [call site] 00053
4 status_stage_xact [function] [call site] 00054
3 process_get_descriptor [function] [call site] 00055
4 tud_descriptor_device_cb [function] [call site] 00056
4 tud_control_xfer [function] [call site] 00057
4 tud_descriptor_bos_cb [function] [call site] 00058
4 tud_control_xfer [function] [call site] 00059
4 tud_descriptor_configuration_cb [function] [call site] 00060
4 tud_descriptor_other_speed_configuration_cb [function] [call site] 00061
4 tud_control_xfer [function] [call site] 00062
4 tud_descriptor_string_cb [function] [call site] 00063
5 strlen [call site] 00064
4 tud_control_xfer [function] [call site] 00065
4 tud_descriptor_device_qualifier_cb [function] [call site] 00066
4 tud_control_xfer [function] [call site] 00067
3 tud_control_status [function] [call site] 00068
3 tud_control_status [function] [call site] 00069
3 tud_control_xfer [function] [call site] 00070
3 invoke_class_control [function] [call site] 00071
3 usbd_control_set_complete_callback [function] [call site] 00072
3 tud_control_xfer [function] [call site] 00073
3 tud_control_status [function] [call site] 00074
3 invoke_class_control [function] [call site] 00075
3 usbd_edpt_stalled [function] [call site] 00076
3 tud_control_xfer [function] [call site] 00077
3 usbd_edpt_clear_stall [function] [call site] 00078
4 dcd_edpt_clear_stall [function] [call site] 00079
3 usbd_edpt_stall [function] [call site] 00080
4 dcd_edpt_stall [function] [call site] 00081
3 invoke_class_control [function] [call site] 00082
3 usbd_control_set_complete_callback [function] [call site] 00083
3 tud_control_status [function] [call site] 00084
2 dcd_edpt_stall [function] [call site] 00085
2 dcd_edpt_stall [function] [call site] 00086
2 usbd_control_xfer_cb [function] [call site] 00087
3 dcd_edpt0_status_complete [function] [call site] 00088
3 status_stage_xact [function] [call site] 00089
3 dcd_edpt_stall [function] [call site] 00090
3 dcd_edpt_stall [function] [call site] 00091
3 data_stage_xact [function] [call site] 00092
2 tud_suspend_cb [function] [call site] 00093
2 tud_resume_cb [function] [call site] 00094
2 tud_sof_cb [function] [call site] 00095