Fuzz introspector: compress_fuzzer
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
0 485 2 :

['tdefl_compress', 'tdefl_get_adler32']

0 485 mz_deflate call site: 00034 /src/miniz/build/amalgamation/miniz.c:282
0 268 1 :

['tdefl_compress_block']

0 268 tdefl_flush_block call site: 00018 /src/miniz/build/amalgamation/miniz.c:1325
0 0 None 0 812 tdefl_compress call site: 00014 /src/miniz/build/amalgamation/miniz.c:1944
0 0 None 0 198 mz_inflate call site: 00042 /src/miniz/build/amalgamation/miniz.c:467
0 0 None 0 5 tdefl_compress call site: 00032 /src/miniz/build/amalgamation/miniz.c:1970
0 0 None 0 4 mz_compress2 call site: 00013 /src/miniz/build/amalgamation/miniz.c:339
0 0 None 0 3 tinfl_decompress call site: 00043 /src/miniz/build/amalgamation/miniz.c:2479
0 0 None 0 0 tdefl_compress call site: 00014 /src/miniz/build/amalgamation/miniz.c:1915
0 0 None 0 0 tdefl_compress call site: 00014 /src/miniz/build/amalgamation/miniz.c:1933
0 0 None 0 0 tdefl_compress call site: 00016 /src/miniz/build/amalgamation/miniz.c:1958
0 0 None 0 0 tdefl_compress call site: 00032 /src/miniz/build/amalgamation/miniz.c:1967
0 0 None 0 0 tdefl_create_comp_flags_from_zip_params call site: 00011 /src/miniz/build/amalgamation/miniz.c:2115

Fuzzer calltree

0 LLVMFuzzerTestOneInput [function] [call site] 00000
1 compressBound [function] [call site] 00001
2 mz_compressBound [function] [call site] 00002
3 mz_deflateBound [function] [call site] 00003
1 calloc [call site] 00004
1 calloc [call site] 00005
1 check_compress_level [function] [call site] 00006
2 compress2 [function] [call site] 00007
3 mz_compress2 [function] [call site] 00008
4 mz_deflateInit [function] [call site] 00009
5 mz_deflateInit2 [function] [call site] 00010
6 tdefl_create_comp_flags_from_zip_params [function] [call site] 00011
6 tdefl_init [function] [call site] 00012
4 mz_deflate [function] [call site] 00013
5 tdefl_compress [function] [call site] 00014
6 tdefl_flush_output_buffer [function] [call site] 00015
6 tdefl_compress_normal [function] [call site] 00016
7 tdefl_flush_block [function] [call site] 00017
8 tdefl_compress_block [function] [call site] 00018
9 tdefl_start_static_block [function] [call site] 00019
10 tdefl_optimize_huffman_table [function] [call site] 00020
11 tdefl_radix_sort_syms [function] [call site] 00021
11 tdefl_calculate_minimum_redundancy [function] [call site] 00022
11 tdefl_huffman_enforce_max_code_size [function] [call site] 00023
10 tdefl_optimize_huffman_table [function] [call site] 00024
9 tdefl_start_dynamic_block [function] [call site] 00025
10 tdefl_optimize_huffman_table [function] [call site] 00026
10 tdefl_optimize_huffman_table [function] [call site] 00027
10 tdefl_optimize_huffman_table [function] [call site] 00028
9 tdefl_compress_lz_codes [function] [call site] 00029
8 tdefl_compress_block [function] [call site] 00030
6 mz_adler32 [function] [call site] 00031
6 tdefl_flush_block [function] [call site] 00032
6 tdefl_flush_output_buffer [function] [call site] 00033
5 tdefl_get_adler32 [function] [call site] 00034
4 mz_deflateEnd [function] [call site] 00035
4 mz_deflateEnd [function] [call site] 00036
2 uncompress [function] [call site] 00037
3 mz_uncompress [function] [call site] 00038
4 mz_uncompress2 [function] [call site] 00039
5 mz_inflateInit [function] [call site] 00040
6 mz_inflateInit2 [function] [call site] 00041
5 mz_inflate [function] [call site] 00042
6 tinfl_decompress [function] [call site] 00043
7 tinfl_clear_tree [function] [call site] 00044
6 tinfl_decompress [function] [call site] 00045
5 mz_inflateEnd [function] [call site] 00046
5 mz_inflateEnd [function] [call site] 00047
2 __assert_fail [call site] 00048
2 memcmp [call site] 00049
2 __assert_fail [call site] 00050
1 check_compress_level [function] [call site] 00051
1 check_compress_level [function] [call site] 00052
1 check_compress_level [function] [call site] 00053
1 check_decompress [function] [call site] 00054
2 write_zlib_header [function] [call site] 00055
2 uncompress [function] [call site] 00056