Fuzz introspector: inspector/source-codeexample_small_fuzzer.c
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
14 14 2 :

['byte_swap', 'crc_word_big']

14 14 crc32_z call site: 00013 /src/zlib/crc32.c:731
7 7 1 :

['_tr_align']

7 31 deflate call site: 00099 /src/zlib/deflate.c:1212
0 474 6 :

['updatewindow', 'crc32', 'inflate_table', 'fixedtables', 'inflate_fast', 'adler32']

0 474 inflate call site: 00141 /src/zlib/inflate.c:817
0 21 1 :

['crc32']

451 630 deflate call site: 00054 /src/zlib/deflate.c:1160
0 21 1 :

['deflateEnd']

0 21 deflateInit2_ call site: 00006 /src/zlib/deflate.c:499
0 21 1 :

['crc32']

0 21 read_buf call site: 00062 /src/zlib/deflate.c:227
0 17 2 :

['_tr_stored_block', 'flush_pending']

0 17 deflate_stored call site: 00065 /src/zlib/deflate.c:1800
0 7 1 :

['_tr_stored_block']

0 14 _tr_flush_block call site: 00082 /src/zlib/trees.c:1047
0 0 None 451 879 deflate call site: 00034 /src/zlib/deflate.c:974
0 0 None 451 869 deflate call site: 00035 /src/zlib/deflate.c:1009
0 0 None 451 869 deflate call site: 00035 /src/zlib/deflate.c:1011
0 0 None 451 869 deflate call site: 00035 /src/zlib/deflate.c:1013

Fuzzer calltree

0 LLVMFuzzerTestOneInput [function] [call site] 00000
1 compressBound [function] [call site] 00001
1 calloc [call site] 00002
1 calloc [call site] 00003
1 test_deflate [function] [call site] 00004
2 deflateInit_ [function] [call site] 00005
3 deflateInit2_ [function] [call site] 00006
4 deflateEnd [function] [call site] 00007
5 deflateStateCheck [function] [call site] 00008
4 deflateReset [function] [call site] 00009
5 deflateResetKeep [function] [call site] 00010
6 deflateStateCheck [function] [call site] 00011
6 crc32 [function] [call site] 00012
7 crc32_z [function] [call site] 00013
8 crc_word [function] [call site] 00014
8 crc_word [function] [call site] 00015
8 crc_word [function] [call site] 00016
8 crc_word [function] [call site] 00017
8 crc_word [function] [call site] 00018
8 byte_swap [function] [call site] 00019
8 crc_word_big [function] [call site] 00020
8 crc_word_big [function] [call site] 00021
8 crc_word_big [function] [call site] 00022
8 crc_word_big [function] [call site] 00023
8 crc_word_big [function] [call site] 00024
8 byte_swap [function] [call site] 00025
6 adler32 [function] [call site] 00026
7 adler32_z [function] [call site] 00027
6 _tr_init [function] [call site] 00028
7 tr_static_init [function] [call site] 00029
7 init_block [function] [call site] 00030
5 lm_init [function] [call site] 00031
2 fprintf [call site] 00032
2 deflate [function] [call site] 00033
3 deflateStateCheck [function] [call site] 00034
3 flush_pending [function] [call site] 00035
4 _tr_flush_bits [function] [call site] 00036
5 bi_flush [function] [call site] 00037
3 putShortMSB [function] [call site] 00038
3 putShortMSB [function] [call site] 00039
3 putShortMSB [function] [call site] 00040
3 adler32 [function] [call site] 00041
3 flush_pending [function] [call site] 00042
3 crc32 [function] [call site] 00043
3 flush_pending [function] [call site] 00044
3 crc32 [function] [call site] 00045
3 crc32 [function] [call site] 00046
3 flush_pending [function] [call site] 00047
3 crc32 [function] [call site] 00048
3 crc32 [function] [call site] 00049
3 flush_pending [function] [call site] 00050
3 crc32 [function] [call site] 00051
3 crc32 [function] [call site] 00052
3 flush_pending [function] [call site] 00053
3 crc32 [function] [call site] 00054
3 flush_pending [function] [call site] 00055
3 crc32 [function] [call site] 00056
3 flush_pending [function] [call site] 00057
3 deflate_stored [function] [call site] 00058
4 _tr_stored_block [function] [call site] 00059
5 bi_windup [function] [call site] 00060
4 flush_pending [function] [call site] 00061
4 read_buf [function] [call site] 00062
5 adler32 [function] [call site] 00063
5 crc32 [function] [call site] 00064
4 read_buf [function] [call site] 00065
4 _tr_stored_block [function] [call site] 00066
4 flush_pending [function] [call site] 00067
3 deflate_huff [function] [call site] 00068
4 fill_window [function] [call site] 00069
5 slide_hash [function] [call site] 00070
5 read_buf [function] [call site] 00071
4 _tr_flush_block [function] [call site] 00072
5 detect_data_type [function] [call site] 00073
5 build_tree [function] [call site] 00074
6 pqdownheap [function] [call site] 00075
6 pqdownheap [function] [call site] 00076
6 pqdownheap [function] [call site] 00077
6 gen_bitlen [function] [call site] 00078
6 gen_codes [function] [call site] 00079
7 bi_reverse [function] [call site] 00080
5 build_tree [function] [call site] 00081
5 build_bl_tree [function] [call site] 00082
6 scan_tree [function] [call site] 00083
6 scan_tree [function] [call site] 00084
6 build_tree [function] [call site] 00085
5 _tr_stored_block [function] [call site] 00086
5 compress_block [function] [call site] 00087
5 send_all_trees [function] [call site] 00088
6 send_tree [function] [call site] 00089
6 send_tree [function] [call site] 00090
5 compress_block [function] [call site] 00091
5 init_block [function] [call site] 00092
5 bi_windup [function] [call site] 00093
4 flush_pending [function] [call site] 00094
4 _tr_flush_block [function] [call site] 00095
4 flush_pending [function] [call site] 00096
4 _tr_flush_block [function] [call site] 00097
4 flush_pending [function] [call site] 00098
3 deflate_rle [function] [call site] 00099
4 fill_window [function] [call site] 00100
4 _tr_flush_block [function] [call site] 00101
4 flush_pending [function] [call site] 00102
4 _tr_flush_block [function] [call site] 00103
4 flush_pending [function] [call site] 00104
4 _tr_flush_block [function] [call site] 00105
4 flush_pending [function] [call site] 00106
3 _tr_align [function] [call site] 00107
4 bi_flush [function] [call site] 00108
3 _tr_stored_block [function] [call site] 00109
3 flush_pending [function] [call site] 00110
3 putShortMSB [function] [call site] 00111
3 putShortMSB [function] [call site] 00112
3 flush_pending [function] [call site] 00113
2 fprintf [call site] 00114
2 deflate [function] [call site] 00115
2 fprintf [call site] 00116
2 deflateEnd [function] [call site] 00117
2 fprintf [call site] 00118
1 test_inflate [function] [call site] 00119
2 inflateInit_ [function] [call site] 00120
3 inflateInit2_ [function] [call site] 00121
4 inflateReset2 [function] [call site] 00122
5 inflateStateCheck [function] [call site] 00123
5 inflateReset [function] [call site] 00124
6 inflateStateCheck [function] [call site] 00125
6 inflateResetKeep [function] [call site] 00126
7 inflateStateCheck [function] [call site] 00127
2 fprintf [call site] 00128
2 inflate [function] [call site] 00129
3 inflateStateCheck [function] [call site] 00130
3 crc32 [function] [call site] 00131
3 crc32 [function] [call site] 00132
3 adler32 [function] [call site] 00133
3 crc32 [function] [call site] 00134
3 crc32 [function] [call site] 00135
3 crc32 [function] [call site] 00136
3 crc32 [function] [call site] 00137
3 crc32 [function] [call site] 00138
3 crc32 [function] [call site] 00139
3 crc32 [function] [call site] 00140
3 crc32 [function] [call site] 00141
3 adler32 [function] [call site] 00142
3 fixedtables [function] [call site] 00143
3 inflate_table [function] [call site] 00144
3 inflate_table [function] [call site] 00145
3 inflate_table [function] [call site] 00146
3 inflate_fast [function] [call site] 00147
3 crc32 [function] [call site] 00148
3 adler32 [function] [call site] 00149
3 updatewindow [function] [call site] 00150
3 crc32 [function] [call site] 00151
3 adler32 [function] [call site] 00152
2 fprintf [call site] 00153
2 inflateEnd [function] [call site] 00154
3 inflateStateCheck [function] [call site] 00155
2 fprintf [call site] 00156
2 memcmp [call site] 00157
2 fprintf [call site] 00158