Fuzz blockers

The followings are the branches where fuzzer fails to bypass.

Unique non-covered Complexity	Unique Reachable Complexities	Unique Reachable Functions	All non-covered Complexity	All Reachable Complexity	Function Name	Function Callsite	Blocked Branch
25	25	3 : View List ['perror', 'libvchan_recv', 'verify_hdr']	504	508	handle_vchan_data	call site: 00026	/src/qubes-os/qubes-core-qubesdb/fuzz/../daemon/db-cmds.c:687
0	0	None	2	2	qubesdb_init	call site: 00001	/src/qubes-os/qubes-core-qubesdb/fuzz/../daemon/db-core.c:20
0	0	None	2	2	qubesdb_init	call site: 00001	/src/qubes-os/qubes-core-qubesdb/fuzz/../daemon/db-core.c:25
0	0	None	0	0	handle_vchan_data	call site: 00035	/src/qubes-os/qubes-core-qubesdb/fuzz/../daemon/db-cmds.c:710

Fuzzer calltree


         LLVMFuzzerTestOneInput

[function] [call site] 00000


           qubesdb_init

[function] [call site] 00001


             strdup

[call site] 00002


           write_client_buffered

[function] [call site] 00003


             __assert_fail

[call site] 00004


             fcntl

[call site] 00005


             perror

[call site] 00006


             buffer_datacount

[function] [call site] 00007


             buffer_data

[function] [call site] 00008


             write

[call site] 00009


             __errno_location

[call site] 00010


             buffer_append

[function] [call site] 00011


               perror

[call site] 00012


               buffer_secure_zero

[function] [call site] 00013


             buffer_substract

[function] [call site] 00014


               __assert_fail

[call site] 00015


               buffer_secure_zero

[function] [call site] 00016


               perror

[call site] 00017


               exit

[call site] 00018


             buffer_substract

[function] [call site] 00019


             write

[call site] 00020


             __errno_location

[call site] 00021


             buffer_append

[function] [call site] 00022


             perror

[call site] 00023


             fcntl

[call site] 00024


             perror

[call site] 00025


           handle_vchan_data

[function] [call site] 00026


             libvchan_data_ready

[function] [call site] 00027


             libvchan_recv

[function] [call site] 00028


               __errno_location

[call site] 00029


             perror

[call site] 00030


             verify_hdr

[function] [call site] 00031


               verify_path

[function] [call site] 00032


                 strlen

[call site] 00033


             fprintf

[call site] 00034


             libvchan_data_ready

[function] [call site] 00035


             handle_write

[function] [call site] 00036


               read_vchan_or_client

[function] [call site] 00037


                 libvchan_recv

[function] [call site] 00038


                 perror

[call site] 00039


                 libvchan_close

[function] [call site] 00040


                 read

[call site] 00041


                 __errno_location

[call site] 00042


                 perror

[call site] 00043


               verify_data

[function] [call site] 00044


               fprintf

[call site] 00045


               discard_data_and_send_error

[function] [call site] 00046


                 discard_data

[function] [call site] 00047


                   read_vchan_or_client

[function] [call site] 00048


                 write_vchan_or_client

[function] [call site] 00049


                   buffer_datacount

[function] [call site] 00050


                   buffer_data

[function] [call site] 00051


                   write

[call site] 00052


                   buffer_data

[function] [call site] 00053


                   vchan_write_nonblock

[function] [call site] 00054


                     libvchan_buffer_space

[function] [call site] 00055


                     libvchan_write

[function] [call site] 00056


                     __errno_location

[call site] 00057


                   __errno_location

[call site] 00058


                   buffer_append

[function] [call site] 00059


                   perror

[call site] 00060


                   buffer_substract

[function] [call site] 00061


                   write

[call site] 00062


                   vchan_write_nonblock

[function] [call site] 00063


                   __errno_location

[call site] 00064


                   buffer_append

[function] [call site] 00065


                   perror

[call site] 00066


               qubesdb_write

[function] [call site] 00067


                 buffer_secure_zero

[function] [call site] 00068


                 strdup

[call site] 00069


                 fputs

[call site] 00070


                 _exit

[call site] 00071


               fprintf

[call site] 00072


               write_vchan_or_client

[function] [call site] 00073


               write_vchan_or_client

[function] [call site] 00074


               write_vchan_or_client

[function] [call site] 00075


               write_vchan_or_client

[function] [call site] 00076


               qubesdb_fire_watches

[function] [call site] 00077


                 strncmp

[call site] 00078


                 strncpy

[call site] 00079


                 fprintf

[call site] 00080


             fprintf

[call site] 00081


             discard_data_and_send_error

[function] [call site] 00082


             handle_multiread

[function] [call site] 00083


               fprintf

[call site] 00084


               discard_data_and_send_error

[function] [call site] 00085


               strncpy

[call site] 00086


               strlen

[call site] 00087


               qubesdb_search

[function] [call site] 00088


                 strcmp

[call site] 00089


               strncmp

[call site] 00090


               strncpy

[call site] 00091


               write_vchan_or_client

[function] [call site] 00092


               write_vchan_or_client

[function] [call site] 00093


               write_vchan_or_client

[function] [call site] 00094


             libvchan_buffer_space

[function] [call site] 00095


             fprintf

[call site] 00096


             handle_rm

[function] [call site] 00097


               fprintf

[call site] 00098


               discard_data_and_send_error

[function] [call site] 00099


               qubesdb_remove

[function] [call site] 00100


                 strlen

[call site] 00101


                 qubesdb_search

[function] [call site] 00102


                 strncmp

[call site] 00103


                 buffer_secure_zero

[function] [call site] 00104


               write_vchan_or_client

[function] [call site] 00105


               write_vchan_or_client

[function] [call site] 00106


               write_vchan_or_client

[function] [call site] 00107


               qubesdb_fire_watches

[function] [call site] 00108


             fprintf

[call site] 00109


             fprintf

[call site] 00110


             handle_vchan_multiread_resp

[function] [call site] 00111


               libvchan_recv

[function] [call site] 00112


               perror

[call site] 00113


               verify_data

[function] [call site] 00114


               fprintf

[call site] 00115


               qubesdb_write

[function] [call site] 00116


               fprintf

[call site] 00117


               qubesdb_fire_watches

[function] [call site] 00118


             fprintf

[call site] 00119


             fprintf

[call site] 00120


           qubesdb_destroy

[function] [call site] 00121


             buffer_secure_zero

[function] [call site] 00122


             buffer_secure_zero

[function] [call site] 00123