Fuzz introspector: sshsig_fuzz
For issues and ideas: https://github.com/ossf/fuzz-introspector/issues

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
167 167 1 :

['xstrdup']

167 167 tohex call site: 00125 /src/openssh/misc.c:1560
163 163 1 :

['sshfatal']

163 163 xcalloc call site: 00137 /src/openssh/xmalloc.c:56
122 158 5 :

['strrchr', 'do_log', 'match_pattern_list', 'getpid', 'strlcpy']

122 158 sshlogv call site: 00025 /src/openssh/log.c:462
82 243 4 :

['sshlog', 'xmss_sign_open', 'malloc', 'sshkey_xmss_params']

82 452 ssh_xmss_verify call site: 00000 /src/openssh/ssh-xmss.c:314
49 49 5 :

['EC_KEY_get0_group', 'EC_KEY_get0_public_key', 'sshkey_ec_validate_public', 'EVP_PKEY_set1_EC_KEY', 'EVP_PKEY_new']

55 55 ssh_ecdsa_deserialize_public call site: 00000 /src/openssh/ssh-ecdsa.c:251
13 13 1 :

['rsa_hash_id_from_keyname']

23 674 ssh_rsa_verify call site: 00000 /src/openssh/ssh-rsa.c:504
6 6 3 :

['exit', 'closelog', 'openlog']

6 6 log_init call site: 00008 /src/openssh/log.c:215
2 219 2 :

['sshbuf_get_string_direct', 'EC_KEY_set_public_key']

6 223 sshbuf_get_eckey call site: 00000 /src/openssh/sshbuf-getput-crypto.c:110
2 2 1 :

['strlen']

2 2 strlcat call site: 00140 /src/openssh/openbsd-compat/strlcat.c:48
2 2 1 :

['BN_clear_free']

2 2 sshbuf_get_bignum2 call site: 00000 /src/openssh/sshbuf-getput-crypto.c:48
2 2 1 :

['munmap']

2 2 sshkey_prekey_free call site: 00228 /src/openssh/sshkey.c:769
0 235 1 :

['sshkey_deserialize_sk']

0 235 ssh_ecdsa_sk_deserialize_public call site: 00000 /src/openssh/ssh-ecdsa-sk.c:133

Fuzzer calltree

0 LLVMFuzzerTestOneInput [function] [call site] 00000
1 sshbuf_from [function] [call site] 00001
2 calloc [call site] 00002
1 strlen [call site] 00003
1 sshbuf_from [function] [call site] 00004
1 log_init [function] [call site] 00005
2 log_change_level [function] [call site] 00006
2 fprintf [call site] 00007
2 exit [call site] 00008
2 fprintf [call site] 00009
2 exit [call site] 00010
2 openlog [call site] 00011
2 closelog [call site] 00012
1 sshsig_verifyb [function] [call site] 00013
2 sshsig_peek_hashalg [function] [call site] 00014
3 sshbuf_fromb [function] [call site] 00015
4 sshbuf_check_sanity [function] [call site] 00016
5 ssh_signal [function] [call site] 00017
6 memset [call site] 00018
6 sigfillset [call site] 00019
6 sigaction [call site] 00020
6 strsignal [call site] 00021
6 __errno_location [call site] 00022
6 strerror [call site] 00023
6 sshlog [function] [call site] 00024
7 sshlogv [function] [call site] 00025
8 strrchr [call site] 00026
8 getpid [call site] 00027
8 snprintf [call site] 00028
8 match_pattern_list [function] [call site] 00029
9 strlen [call site] 00030
9 __ctype_b_loc [call site] 00031
9 tolower [call site] 00032
9 match_pattern [function] [call site] 00033
10 match_pattern [function] [call site] 00034
11 match_pattern [function] [call site] 00035
8 snprintf [call site] 00036
8 snprintf [call site] 00037
8 strlcpy [function] [call site] 00038
8 do_log [function] [call site] 00039
9 __errno_location [call site] 00040
9 snprintf [call site] 00041
9 vsnprintf [call site] 00042
9 vsnprintf [call site] 00043
9 snprintf [call site] 00044
9 strlcpy [function] [call site] 00045
9 strnvis [function] [call site] 00046
10 __ctype_b_loc [call site] 00047
10 vis [function] [call site] 00048
11 __ctype_b_loc [call site] 00049
11 __ctype_b_loc [call site] 00050
10 vis [function] [call site] 00051
9 snprintf [call site] 00052
9 strlen [call site] 00053
9 write [call site] 00054
9 openlog [call site] 00055
9 syslog [call site] 00056
9 closelog [call site] 00057
9 __errno_location [call site] 00058
5 raise [call site] 00059
4 sshbuf_ptr [function] [call site] 00060
5 sshbuf_check_sanity [function] [call site] 00061
4 sshbuf_len [function] [call site] 00062
5 sshbuf_check_sanity [function] [call site] 00063
4 sshbuf_from [function] [call site] 00064
4 sshbuf_set_parent [function] [call site] 00065
5 sshbuf_check_sanity [function] [call site] 00066
5 sshbuf_check_sanity [function] [call site] 00067
4 sshbuf_free [function] [call site] 00068
5 sshbuf_check_sanity [function] [call site] 00069
5 sshbuf_free [function] [call site] 00070
6 freezero [function] [call site] 00071
7 explicit_bzero [call site] 00072
6 freezero [function] [call site] 00073
3 sshsig_parse_preamble [function] [call site] 00074
4 sshbuf_cmp [function] [call site] 00075
5 sshbuf_ptr [function] [call site] 00076
5 sshbuf_len [function] [call site] 00077
5 sshbuf_ptr [function] [call site] 00078
5 timingsafe_bcmp [function] [call site] 00079
4 sshbuf_consume [function] [call site] 00080
5 sshbuf_check_sanity [function] [call site] 00081
5 sshbuf_len [function] [call site] 00082
4 sshbuf_get_u32 [function] [call site] 00083
5 sshbuf_ptr [function] [call site] 00084
5 sshbuf_consume [function] [call site] 00085
4 sshlog [function] [call site] 00086
4 sshlog [function] [call site] 00087
3 sshbuf_get_string_direct [function] [call site] 00088
4 sshbuf_peek_string_direct [function] [call site] 00089
5 sshbuf_ptr [function] [call site] 00090
5 sshbuf_len [function] [call site] 00091
5 sshbuf_len [function] [call site] 00092
4 sshbuf_consume [function] [call site] 00093
3 sshbuf_get_string_direct [function] [call site] 00094
3 sshbuf_get_string [function] [call site] 00095
4 sshbuf_get_string_direct [function] [call site] 00096
3 sshbuf_get_cstring [function] [call site] 00097
4 sshbuf_peek_string_direct [function] [call site] 00098
4 memchr [call site] 00099
4 sshbuf_get_string_direct [function] [call site] 00100
3 ssh_err [function] [call site] 00101
4 __errno_location [call site] 00102
4 strerror [call site] 00103
3 sshlog [function] [call site] 00104
3 sshbuf_free [function] [call site] 00105
2 sshlog [function] [call site] 00106
2 hash_buffer [function] [call site] 00107
3 memset [call site] 00108
3 sshsig_check_hashalg [function] [call site] 00109
4 match_pattern_list [function] [call site] 00110
4 sshlog [function] [call site] 00111
3 ssh_digest_alg_by_name [function] [call site] 00112
4 strcasecmp [call site] 00113
3 sshlog [function] [call site] 00114
3 ssh_digest_buffer [function] [call site] 00115
4 sshbuf_ptr [function] [call site] 00116
4 sshbuf_len [function] [call site] 00117
4 ssh_digest_memory [function] [call site] 00118
5 ssh_digest_by_alg [function] [call site] 00119
5 EVP_Digest [call site] 00120
3 ssh_err [function] [call site] 00121
3 sshlog [function] [call site] 00122
3 ssh_digest_bytes [function] [call site] 00123
4 ssh_digest_by_alg [function] [call site] 00124
3 tohex [function] [call site] 00125
4 xstrdup [function] [call site] 00126
5 strlen [call site] 00127
5 xmalloc [function] [call site] 00128
6 sshfatal [function] [call site] 00129
7 sshlogv [function] [call site] 00130
7 cleanup_exit [function] [call site] 00131
8 _exit [call site] 00132
6 sshfatal [function] [call site] 00133
4 xcalloc [function] [call site] 00134
5 sshfatal [function] [call site] 00135
5 sshfatal [function] [call site] 00136
5 calloc [call site] 00137
5 sshfatal [function] [call site] 00138
4 snprintf [call site] 00139
4 strlcat [function] [call site] 00140
5 strlen [call site] 00141
3 sshlog [function] [call site] 00142
3 strlen [call site] 00143
3 freezero [function] [call site] 00144
3 sshbuf_new [function] [call site] 00145
4 calloc [call site] 00146
4 calloc [call site] 00147
3 ssh_digest_bytes [function] [call site] 00148
3 sshbuf_put [function] [call site] 00149
4 sshbuf_reserve [function] [call site] 00150
5 sshbuf_allocate [function] [call site] 00151
6 sshbuf_check_reserve [function] [call site] 00152
7 sshbuf_check_sanity [function] [call site] 00153
6 sshbuf_maybe_pack [function] [call site] 00154
6 recallocarray [function] [call site] 00155
7 calloc [call site] 00156
7 __errno_location [call site] 00157
7 __errno_location [call site] 00158
7 getpagesize [call site] 00159
7 memset [call site] 00160
7 memset [call site] 00161
7 explicit_bzero [call site] 00162
6 sshbuf_check_reserve [function] [call site] 00163
3 ssh_err [function] [call site] 00164
3 sshlog [function] [call site] 00165
3 sshbuf_free [function] [call site] 00166
3 explicit_bzero [call site] 00167
2 ssh_err [function] [call site] 00168
2 sshlog [function] [call site] 00169
2 sshsig_wrap_verify [function] [call site] 00170
3 sshbuf_len [function] [call site] 00171
3 sshlog [function] [call site] 00172
3 sshbuf_new [function] [call site] 00173
3 sshlog [function] [call site] 00174
3 sshbuf_put [function] [call site] 00175
3 sshbuf_put_cstring [function] [call site] 00176
4 strlen [call site] 00177
4 sshbuf_put_string [function] [call site] 00178
5 sshbuf_reserve [function] [call site] 00179
3 sshbuf_put_string [function] [call site] 00180
3 sshbuf_put_cstring [function] [call site] 00181
3 sshbuf_put_stringb [function] [call site] 00182
4 sshbuf_put_string [function] [call site] 00183
4 sshbuf_ptr [function] [call site] 00184
4 sshbuf_len [function] [call site] 00185
4 sshbuf_put_string [function] [call site] 00186
3 ssh_err [function] [call site] 00187
3 sshlog [function] [call site] 00188
3 sshsig_parse_preamble [function] [call site] 00189
3 sshkey_froms [function] [call site] 00190
4 sshbuf_froms [function] [call site] 00191
5 sshbuf_peek_string_direct [function] [call site] 00192
5 sshbuf_from [function] [call site] 00193
5 sshbuf_consume [function] [call site] 00194
5 sshbuf_set_parent [function] [call site] 00195
5 sshbuf_free [function] [call site] 00196
4 sshkey_from_blob_internal [function] [call site] 00197
5 sshbuf_fromb [function] [call site] 00198
5 sshbuf_get_cstring [function] [call site] 00199
5 sshkey_type_from_name [function] [call site] 00200
6 type_from_name [function] [call site] 00201
7 strcmp [call site] 00202
7 strcasecmp [call site] 00203
5 sshkey_type_is_cert [function] [call site] 00204
6 sshkey_impl_from_type [function] [call site] 00205
5 sshkey_impl_from_type [function] [call site] 00206
5 sshkey_new [function] [call site] 00207
6 sshkey_impl_from_type [function] [call site] 00208
6 calloc [call site] 00209
6 sshkey_is_cert [function] [call site] 00210
7 sshkey_type_is_cert [function] [call site] 00211
6 cert_new [function] [call site] 00212
7 calloc [call site] 00213
7 sshbuf_new [function] [call site] 00214
7 sshbuf_new [function] [call site] 00215
7 sshbuf_new [function] [call site] 00216
7 cert_free [function] [call site] 00217
8 sshbuf_free [function] [call site] 00218
8 sshbuf_free [function] [call site] 00219
8 sshbuf_free [function] [call site] 00220
8 sshkey_free [function] [call site] 00221
9 sshkey_free_contents [function] [call site] 00222
10 sshkey_impl_from_type [function] [call site] 00223
10 sshkey_is_cert [function] [call site] 00224
10 cert_free [function] [call site] 00225
11 freezero [function] [call site] 00226
10 freezero [function] [call site] 00227
10 sshkey_prekey_free [function] [call site] 00228
11 munmap [call site] 00229
9 freezero [function] [call site] 00230
6 sshkey_free [function] [call site] 00231
5 sshkey_type_is_cert [function] [call site] 00232
5 sshbuf_get_string_direct [function] [call site] 00233
5 sshkey_is_cert [function] [call site] 00234
5 cert_parse [function] [call site] 00235
6 sshbuf_putb [function] [call site] 00236
7 sshbuf_ptr [function] [call site] 00237
7 sshbuf_len [function] [call site] 00238
7 sshbuf_put [function] [call site] 00239
6 sshbuf_get_u64 [function] [call site] 00240
7 sshbuf_ptr [function] [call site] 00241
7 sshbuf_consume [function] [call site] 00242
6 sshbuf_get_u32 [function] [call site] 00243
6 sshbuf_get_cstring [function] [call site] 00244
6 sshbuf_froms [function] [call site] 00245
6 sshbuf_get_u64 [function] [call site] 00246
6 sshbuf_get_u64 [function] [call site] 00247
6 sshbuf_froms [function] [call site] 00248
6 sshbuf_froms [function] [call site] 00249
6 sshbuf_get_string_direct [function] [call site] 00250
6 sshbuf_froms [function] [call site] 00251
6 sshbuf_len [function] [call site] 00252
6 sshbuf_get_string [function] [call site] 00253
6 sshbuf_len [function] [call site] 00254
6 sshbuf_get_cstring [function] [call site] 00255
6 recallocarray [function] [call site] 00256
6 sshbuf_putb [function] [call site] 00257
6 sshbuf_putb [function] [call site] 00258
6 sshbuf_len [function] [call site] 00259
6 sshbuf_get_string_direct [function] [call site] 00260
6 sshbuf_get_string_direct [function] [call site] 00261
6 sshbuf_reset [function] [call site] 00262
7 sshbuf_check_sanity [function] [call site] 00263
7 recallocarray [function] [call site] 00264
7 explicit_bzero [call site] 00265
6 sshbuf_len [function] [call site] 00266
6 sshbuf_get_string_direct [function] [call site] 00267
6 sshbuf_get_string_direct [function] [call site] 00268
6 sshbuf_reset [function] [call site] 00269
6 sshkey_from_blob_internal [function] [call site] 00270
7 sshbuf_len [function] [call site] 00271
7 sshbuf_free [function] [call site] 00272
7 sshkey_free [function] [call site] 00273
6 sshkey_type_is_valid_ca [function] [call site] 00274
7 sshkey_impl_from_type [function] [call site] 00275
6 sshbuf_ptr [function] [call site] 00276
6 sshkey_verify [function] [call site] 00277
7 sshkey_impl_from_key [function] [call site] 00278
8 sshkey_impl_from_type_nid [function] [call site] 00279
6 sshkey_get_sigtype [function] [call site] 00280
7 sshbuf_from [function] [call site] 00281
7 sshbuf_get_cstring [function] [call site] 00282
7 sshbuf_free [function] [call site] 00283
6 sshbuf_free [function] [call site] 00284
6 sshbuf_free [function] [call site] 00285
6 sshbuf_free [function] [call site] 00286
6 sshbuf_free [function] [call site] 00287
4 sshbuf_free [function] [call site] 00288
3 sshbuf_get_cstring [function] [call site] 00289
3 sshbuf_get_string [function] [call site] 00290
3 sshbuf_get_cstring [function] [call site] 00291
3 sshbuf_get_string_direct [function] [call site] 00292
3 ssh_err [function] [call site] 00293
3 sshlog [function] [call site] 00294
3 sshbuf_len [function] [call site] 00295
3 sshlog [function] [call site] 00296
3 strcmp [call site] 00297
3 sshlog [function] [call site] 00298
3 sshlog [function] [call site] 00299
3 strcmp [call site] 00300
3 sshlog [function] [call site] 00301
3 sshlog [function] [call site] 00302
3 sshkey_type_plain [function] [call site] 00303
3 sshkey_get_sigtype [function] [call site] 00304
3 ssh_err [function] [call site] 00305
3 sshlog [function] [call site] 00306
3 match_pattern_list [function] [call site] 00307
3 sshlog [function] [call site] 00308
3 sshbuf_ptr [function] [call site] 00309
3 sshbuf_len [function] [call site] 00310
3 sshkey_verify [function] [call site] 00311
3 ssh_err [function] [call site] 00312
3 sshlog [function] [call site] 00313
3 sshbuf_free [function] [call site] 00314
3 sshbuf_free [function] [call site] 00315
3 sshkey_free [function] [call site] 00316
2 sshbuf_free [function] [call site] 00317
1 sshkey_sig_details_free [function] [call site] 00318
2 freezero [function] [call site] 00319
1 sshkey_free [function] [call site] 00320
1 sshbuf_free [function] [call site] 00321
1 sshbuf_free [function] [call site] 00322