Fuzz introspector: sig_fuzz
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
49 112 sshkey_ssh_name_from_type_nid call site: 00112 cert_free
34 31 sshlog call site: 00031 do_log
18 93 sshbuf_ptr call site: 00093 sshbuf_put
12 77 sshkey_impl_from_key call site: 00077 helper_by_key
10 11 sshkey_is_cert call site: 00011 cert_new
8 22 sshbuf_free call site: 00022 ssh_signal
7 69 sshbuf_free call site: 00069 sshkey_free
2 90 sshbuf_len call site: 00090 sshbuf_putb
1 7 sshkey_generate call site: 00007 sshkey_impl_from_type
1 66 sshbuf_free call site: 00066 freezero
1 187 LLVMFuzzerTestOneInput call site: 00187 sshkey_verify

Fuzzer calltree

0 LLVMFuzzerTestOneInput [function] [call site] 00000
1 __cxa_guard_acquire [call site] 00001
1 generate_or_die(int, unsigned int) [function] [call site] 00002
2 sshkey_generate [function] [call site] 00003
3 sshkey_type_is_cert [function] [call site] 00004
4 sshkey_impl_from_type [function] [call site] 00005
3 sshkey_impl_from_type [function] [call site] 00006
3 sshkey_new [function] [call site] 00007
4 sshkey_impl_from_type [function] [call site] 00008
4 calloc [call site] 00009
4 sshkey_is_cert [function] [call site] 00010
5 sshkey_type_is_cert [function] [call site] 00011
4 cert_new [function] [call site] 00012
5 calloc [call site] 00013
5 sshbuf_new_label [function] [call site] 00014
6 calloc [call site] 00015
6 strncpy [call site] 00016
6 calloc [call site] 00017
5 sshbuf_new_label [function] [call site] 00018
5 sshbuf_new_label [function] [call site] 00019
5 cert_free [function] [call site] 00020
6 sshbuf_free [function] [call site] 00021
7 sshbuf_check_sanity [function] [call site] 00022
8 ssh_signal [function] [call site] 00023
9 memset [call site] 00024
9 sigfillset [call site] 00025
9 sigaction [call site] 00026
9 strsignal [call site] 00027
9 __errno_location [call site] 00028
9 strerror [call site] 00029
9 sshlog [function] [call site] 00030
10 sshlogv [function] [call site] 00031
11 strrchr [call site] 00032
11 getpid [call site] 00033
11 snprintf [call site] 00034
11 match_pattern_list [function] [call site] 00035
12 strlen [call site] 00036
12 __ctype_b_loc [call site] 00037
12 tolower [call site] 00038
12 match_pattern [function] [call site] 00039
13 match_pattern [function] [call site] 00040
14 match_pattern [function] [call site] 00041
11 snprintf [call site] 00042
11 snprintf [call site] 00043
11 strlcpy [function] [call site] 00044
11 do_log [function] [call site] 00045
12 __errno_location [call site] 00046
12 snprintf [call site] 00047
12 vsnprintf [call site] 00048
12 vsnprintf [call site] 00049
12 snprintf [call site] 00050
12 strlcpy [function] [call site] 00051
12 strnvis [function] [call site] 00052
13 __ctype_b_loc [call site] 00053
13 vis [function] [call site] 00054
14 __ctype_b_loc [call site] 00055
14 __ctype_b_loc [call site] 00056
13 vis [function] [call site] 00057
12 snprintf [call site] 00058
12 strlen [call site] 00059
12 write [call site] 00060
12 openlog [call site] 00061
12 syslog [call site] 00062
12 closelog [call site] 00063
12 __errno_location [call site] 00064
8 raise [call site] 00065
7 sshbuf_free [function] [call site] 00066
8 freezero [function] [call site] 00067
9 explicit_bzero [call site] 00068
8 freezero [function] [call site] 00069
6 sshbuf_free [function] [call site] 00070
6 sshbuf_free [function] [call site] 00071
6 sshkey_free [function] [call site] 00072
7 sshkey_free_contents [function] [call site] 00073
8 pkcs11_key_free [function] [call site] 00074
9 sshkey_type [function] [call site] 00075
10 sshkey_impl_from_key [function] [call site] 00076
11 sshkey_impl_from_type_nid [function] [call site] 00077
9 sshlog [function] [call site] 00078
9 helper_by_key [function] [call site] 00079
10 sshbuf_new_label [function] [call site] 00080
10 sshfatal [function] [call site] 00081
11 sshlogv [function] [call site] 00082
11 cleanup_exit [function] [call site] 00083
12 _exit [call site] 00084
10 sshkey_putb [function] [call site] 00085
11 to_blob_buf [function] [call site] 00086
12 sshkey_type_plain [function] [call site] 00087
12 sshkey_type_is_cert [function] [call site] 00088
12 sshbuf_len [function] [call site] 00089
13 sshbuf_check_sanity [function] [call site] 00090
12 sshbuf_putb [function] [call site] 00091
13 sshbuf_ptr [function] [call site] 00092
14 sshbuf_check_sanity [function] [call site] 00093
13 sshbuf_len [function] [call site] 00094
13 sshbuf_put [function] [call site] 00095
14 sshbuf_reserve [function] [call site] 00096
15 sshbuf_allocate [function] [call site] 00097
16 sshbuf_check_reserve [function] [call site] 00098
17 sshbuf_check_sanity [function] [call site] 00099
16 sshbuf_maybe_pack [function] [call site] 00100
16 recallocarray [function] [call site] 00101
17 calloc [call site] 00102
17 __errno_location [call site] 00103
17 __errno_location [call site] 00104
17 getpagesize [call site] 00105
17 memset [call site] 00106
17 memset [call site] 00107
17 explicit_bzero [call site] 00108
16 sshbuf_check_reserve [function] [call site] 00109
12 sshkey_impl_from_type [function] [call site] 00110
12 sshkey_ssh_name_from_type_nid [function] [call site] 00111
13 sshkey_impl_from_type_nid [function] [call site] 00112
12 sshbuf_put_cstring [function] [call site] 00113
13 strlen [call site] 00114
13 sshbuf_put_string [function] [call site] 00115
14 sshbuf_reserve [function] [call site] 00116
10 ssh_err [function] [call site] 00117
11 __errno_location [call site] 00118
11 strerror [call site] 00119
10 sshfatal [function] [call site] 00120
10 sshbuf_equals [function] [call site] 00121
11 sshbuf_ptr [function] [call site] 00122
11 sshbuf_len [function] [call site] 00123
11 sshbuf_len [function] [call site] 00124
11 sshbuf_ptr [function] [call site] 00125
11 sshbuf_len [function] [call site] 00126
11 memcmp [call site] 00127
10 sshbuf_free [function] [call site] 00128
10 sshbuf_free [function] [call site] 00129
9 sshkey_type [function] [call site] 00130
9 sshfatal [function] [call site] 00131
9 sshbuf_new_label [function] [call site] 00132
9 sshfatal [function] [call site] 00133
9 sshkey_putb [function] [call site] 00134
9 ssh_err [function] [call site] 00135
9 sshfatal [function] [call site] 00136
9 sshbuf_equals [function] [call site] 00137
9 sshfatal [function] [call site] 00138
9 xrecallocarray [function] [call site] 00139
10 recallocarray [function] [call site] 00140
10 sshfatal [function] [call site] 00141
9 helper_terminate [function] [call site] 00142
10 sshfatal [function] [call site] 00143
10 sshlog [function] [call site] 00144
10 close [call site] 00145
10 sshfatal [function] [call site] 00146
10 xrecallocarray [function] [call site] 00147
10 sshbuf_free [function] [call site] 00148
8 sshkey_impl_from_type [function] [call site] 00149
8 sshkey_is_cert [function] [call site] 00150
8 cert_free [function] [call site] 00151
9 freezero [function] [call site] 00152
8 freezero [function] [call site] 00153
8 sshkey_prekey_free [function] [call site] 00154
9 munmap [call site] 00155
7 freezero [function] [call site] 00156
4 sshkey_free [function] [call site] 00157
3 sshkey_free [function] [call site] 00158
2 ssh_err [function] [call site] 00159
2 fprintf [call site] 00160
2 abort [call site] 00161
1 __cxa_guard_release [call site] 00162
1 __cxa_guard_acquire [call site] 00163
1 generate_or_die(int, unsigned int) [function] [call site] 00164
1 __cxa_guard_release [call site] 00165
1 __cxa_guard_acquire [call site] 00166
1 generate_or_die(int, unsigned int) [function] [call site] 00167
1 __cxa_guard_release [call site] 00168
1 __cxa_guard_acquire [call site] 00169
1 generate_or_die(int, unsigned int) [function] [call site] 00170
1 __cxa_guard_release [call site] 00171
1 __cxa_guard_acquire [call site] 00172
1 generate_or_die(int, unsigned int) [function] [call site] 00173
1 __cxa_guard_release [call site] 00174
1 __cxa_guard_acquire [call site] 00175
1 strlen [call site] 00176
1 __cxa_guard_release [call site] 00177
1 sshkey_verify [function] [call site] 00178
2 sshkey_impl_from_key [function] [call site] 00179
1 sshkey_sig_details_free [function] [call site] 00180
2 freezero [function] [call site] 00181
1 sshkey_verify [function] [call site] 00182
1 sshkey_sig_details_free [function] [call site] 00183
1 sshkey_verify [function] [call site] 00184
1 sshkey_sig_details_free [function] [call site] 00185
1 sshkey_verify [function] [call site] 00186
1 sshkey_sig_details_free [function] [call site] 00187
1 sshkey_verify [function] [call site] 00188
1 sshkey_sig_details_free [function] [call site] 00189
1 __cxa_guard_abort [call site] 00190
1 __cxa_guard_abort [call site] 00191
1 __cxa_guard_abort [call site] 00192
1 __cxa_guard_abort [call site] 00193
1 __cxa_guard_abort [call site] 00194