Fuzz introspector: /src/tinyusb/test/fuzz/device/net/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 82 tud_task_ext call site: 00082 usbd_control_xfer_cb
4 42 tud_control_xfer call site: 00042 configuration_reset
4 68 process_std_device_request call site: 00068 tud_control_xfer
4 97 net_task call site: 00097 do_in_xfer
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 48 process_set_config call site: 00048 tu_bind_driver_to_ep_itf
2 78 usbd_edpt_stall call site: 00078 tud_control_status
2 90 tud_task_ext call site: 00090 net_task
1 0 EP call site: 00000 fuzz_init
1 8 tud_rhport_init call site: 00008 dcd_int_handler
1 20 dcd_int_handler call site: 00020 tud_task_ext

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 usbd_reset [function] [call site] 00028
3 configuration_reset [function] [call site] 00029
2 usbd_reset [function] [call site] 00030
2 tud_umount_cb [function] [call site] 00031
2 process_setup_received [function] [call site] 00032
3 tud_vendor_control_xfer_cb [function] [call site] 00033
3 invoke_class_control [function] [call site] 00034
3 process_std_device_request [function] [call site] 00035
4 dcd_set_address [function] [call site] 00036
5 dcd_edpt_xfer [function] [call site] 00037
4 tud_control_xfer [function] [call site] 00038
5 data_stage_xact [function] [call site] 00039
6 usbd_edpt_xfer [function] [call site] 00040
7 dcd_edpt_xfer [function] [call site] 00041
5 usbd_edpt_xfer [function] [call site] 00042
4 dcd_sof_enable [function] [call site] 00043
4 dcd_edpt_close_all [function] [call site] 00044
4 configuration_reset [function] [call site] 00045
4 tud_umount_cb [function] [call site] 00046
4 process_set_config [function] [call site] 00047
5 tud_descriptor_configuration_cb [function] [call site] 00048
5 tu_bind_driver_to_ep_itf [function] [call site] 00049
4 tud_mount_cb [function] [call site] 00050
4 tud_control_status [function] [call site] 00051
5 usbd_edpt_xfer [function] [call site] 00052
4 process_get_descriptor [function] [call site] 00053
5 tud_descriptor_device_cb [function] [call site] 00054
5 tud_control_xfer [function] [call site] 00055
5 tud_descriptor_bos_cb [function] [call site] 00056
5 tud_control_xfer [function] [call site] 00057
5 tud_descriptor_configuration_cb [function] [call site] 00058
5 tud_descriptor_other_speed_configuration_cb [function] [call site] 00059
5 tud_control_xfer [function] [call site] 00060
5 tud_descriptor_string_cb [function] [call site] 00061
6 strlen [call site] 00062
5 tud_control_xfer [function] [call site] 00063
5 tud_descriptor_device_qualifier_cb [function] [call site] 00064
5 tud_control_xfer [function] [call site] 00065
4 tud_control_status [function] [call site] 00066
4 tud_control_status [function] [call site] 00067
4 tud_control_xfer [function] [call site] 00068
3 invoke_class_control [function] [call site] 00069
3 tud_control_xfer [function] [call site] 00070
3 tud_control_status [function] [call site] 00071
3 invoke_class_control [function] [call site] 00072
3 usbd_edpt_stalled [function] [call site] 00073
3 tud_control_xfer [function] [call site] 00074
3 usbd_edpt_clear_stall [function] [call site] 00075
4 dcd_edpt_clear_stall [function] [call site] 00076
3 usbd_edpt_stall [function] [call site] 00077
4 dcd_edpt_stall [function] [call site] 00078
3 invoke_class_control [function] [call site] 00079
3 tud_control_status [function] [call site] 00080
2 dcd_edpt_stall [function] [call site] 00081
2 dcd_edpt_stall [function] [call site] 00082
2 usbd_control_xfer_cb [function] [call site] 00083
3 dcd_edpt0_status_complete [function] [call site] 00084
3 usbd_edpt_xfer [function] [call site] 00085
3 dcd_edpt_stall [function] [call site] 00086
3 dcd_edpt_stall [function] [call site] 00087
3 data_stage_xact [function] [call site] 00088
2 tud_suspend_cb [function] [call site] 00089
2 tud_resume_cb [function] [call site] 00090
2 tud_sof_cb [function] [call site] 00091
1 net_task [function] [call site] 00092
2 __assert_fail [call site] 00093
2 tud_network_recv_renew [function] [call site] 00094
3 usbd_edpt_xfer [function] [call site] 00095
2 tud_network_can_xmit [function] [call site] 00096
2 tud_network_xmit [function] [call site] 00097
3 tud_network_xmit_cb [function] [call site] 00098
4 __assert_fail [call site] 00099
3 do_in_xfer [function] [call site] 00100
4 usbd_edpt_xfer [function] [call site] 00101