Fuzz introspector: zxc_fuzzer_seekable
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
6 23 zxc_compress call site: 00023 zxc_huf_dict_tree_build
4 5 zxc_compress call site: 00005 zxc_write_empty_frame
4 32 zxc_compress call site: 00032 zxc_cctx_free
3 126 zxc_seek_mt_worker call site: 00126 zxc_cctx_free
3 153 LLVMFuzzerTestOneInput call site: 00153 zxc_seekable_decompress_range
1 10 zxc_seek_table_header call site: 00010 zxc_write_file_footer
1 16 zxc_cctx_init call site: 00016 zxc_dctx_entropy_sizes
1 21 zxc_cctx_init_in_workspace call site: 00021 zxc_aligned_free
1 30 zxc_cctx_free call site: 00030 zxc_aligned_free
1 37 zxc_compress call site: 00037 zxc_cctx_free
1 79 zxc_seek_load_spans call site: 00079 zxc_seek_source_read
1 92 LLVMFuzzerTestOneInput call site: 00092 zxc_seekable_free

Fuzzer calltree

0 LLVMFuzzerTestOneInput [function] [call site] 00000
1 zxc_compress_bound [function] [call site] 00001
1 realloc [call site] 00002
1 zxc_compress [function] [call site] 00003
2 zxc_level_clamp [function] [call site] 00004
2 zxc_dict_id [function] [call site] 00005
2 zxc_write_empty_frame [function] [call site] 00006
3 zxc_write_file_header [function] [call site] 00007
3 zxc_write_block_header [function] [call site] 00008
3 zxc_seek_table_header [function] [call site] 00009
4 zxc_write_block_header [function] [call site] 00010
3 zxc_write_file_footer [function] [call site] 00011
4 zxc_encode_footer [function] [call site] 00012
5 zxc_store_le_n [function] [call site] 00013
5 zxc_store_le_n [function] [call site] 00014
2 zxc_cctx_init [function] [call site] 00015
3 compute_cctx_layout [function] [call site] 00016
4 zxc_dctx_entropy_sizes [function] [call site] 00017
3 zxc_aligned_malloc [function] [call site] 00018
4 posix_memalign [call site] 00019
3 zxc_cctx_init_in_workspace [function] [call site] 00020
4 compute_cctx_layout [function] [call site] 00021
3 zxc_aligned_free [function] [call site] 00022
2 zxc_cctx_attach_dict_huf [function] [call site] 00023
3 zxc_huf_dict_tree_build [function] [call site] 00024
4 zxc_huf_unpack_lengths_default [function] [call site] 00025
4 zxc_pivco_tree_build [function] [call site] 00026
5 zxc_pivco_bitrev_permute [function] [call site] 00027
4 zxc_pivco_codes [function] [call site] 00028
2 zxc_cctx_free [function] [call site] 00029
3 zxc_aligned_free [function] [call site] 00030
3 zxc_aligned_free [function] [call site] 00031
2 zxc_write_file_header [function] [call site] 00032
2 zxc_cctx_free [function] [call site] 00033
2 zxc_cctx_free [function] [call site] 00034
2 zxc_cctx_free [function] [call site] 00035
2 zxc_compress_chunk_wrapper [function] [call site] 00036
2 zxc_compress_chunk_wrapper [function] [call site] 00037
2 zxc_cctx_free [function] [call site] 00038
2 zxc_cctx_free [function] [call site] 00039
2 zxc_write_block_header [function] [call site] 00040
2 zxc_write_seek_table [function] [call site] 00041
3 zxc_seek_table_size [function] [call site] 00042
3 zxc_seek_table_header [function] [call site] 00043
3 zxc_seek_write_group [function] [call site] 00044
2 zxc_write_file_footer [function] [call site] 00045
1 zxc_seekable_open [function] [call site] 00046
2 zxc_seekable_parse [function] [call site] 00047
3 realloc [call site] 00048
3 zxc_seek_parse_frame [function] [call site] 00049
4 zxc_scan_frame [function] [call site] 00050
5 zxc_scan_read [function] [call site] 00051
5 zxc_short_input_verdict [function] [call site] 00052
6 zxc_read_file_header [function] [call site] 00053
5 zxc_scan_read [function] [call site] 00054
5 zxc_parse_file_footer [function] [call site] 00055
6 zxc_load_le_n [function] [call site] 00056
6 zxc_load_le_n [function] [call site] 00057
5 zxc_scan_read [function] [call site] 00058
5 zxc_frame_tail_len [function] [call site] 00059
5 zxc_read_frame_info [function] [call site] 00060
6 zxc_read_file_header [function] [call site] 00061
6 zxc_parse_file_footer [function] [call site] 00062
3 zxc_seek_source_read [function] [call site] 00063
3 zxc_check_eof_header [function] [call site] 00064
4 zxc_write_block_header [function] [call site] 00065
4 memcmp [call site] 00066
3 zxc_check_seek_header [function] [call site] 00067
4 zxc_seek_table_header [function] [call site] 00068
4 memcmp [call site] 00069
3 calloc [call site] 00070
1 zxc_seekable_get_num_blocks [function] [call site] 00071
1 zxc_seekable_get_decompressed_size [function] [call site] 00072
1 __assert_fail [call site] 00073
1 zxc_seekable_get_block_comp_size [function] [call site] 00074
2 zxc_seek_frame_of_block [function] [call site] 00075
2 zxc_seek_load_spans [function] [call site] 00076
3 zxc_seek_source_of [function] [call site] 00077
3 zxc_seek_source_read [function] [call site] 00078
3 zxc_seek_source_read [function] [call site] 00079
3 zxc_seek_source_read [function] [call site] 00080
3 zxc_check_eof_header [function] [call site] 00081
3 zxc_check_seek_header [function] [call site] 00082
1 zxc_seekable_get_block_decomp_size [function] [call site] 00083
2 zxc_seek_frame_of_block [function] [call site] 00084
2 zxc_seek_decomp_size [function] [call site] 00085
1 __assert_fail [call site] 00086
1 __assert_fail [call site] 00087
1 zxc_seekable_get_block_comp_size [function] [call site] 00088
1 __assert_fail [call site] 00089
1 zxc_seekable_get_block_decomp_size [function] [call site] 00090
1 __assert_fail [call site] 00091
1 realloc [call site] 00092
1 zxc_seekable_free [function] [call site] 00093
2 zxc_cctx_free [function] [call site] 00094
1 zxc_seekable_decompress_range_mt [function] [call site] 00095
2 zxc_seek_block_of_offset [function] [call site] 00096
2 zxc_seek_block_of_offset [function] [call site] 00097
2 sysconf [call site] 00098
2 zxc_seekable_decompress_range [function] [call site] 00099
3 zxc_cctx_init [function] [call site] 00100
3 zxc_seek_block_of_offset [function] [call site] 00101
3 zxc_seek_block_of_offset [function] [call site] 00102
3 zxc_seek_frame_of_block [function] [call site] 00103
3 zxc_seek_load_spans [function] [call site] 00104
3 realloc [call site] 00105
3 zxc_seek_use_dict [function] [call site] 00106
4 zxc_cctx_attach_dict_huf [function] [call site] 00107
3 zxc_seek_read_block [function] [call site] 00108
4 zxc_seek_source_of [function] [call site] 00109
4 zxc_seek_source_read [function] [call site] 00110
4 zxc_read_block_header [function] [call site] 00111
3 zxc_decompress_chunk_wrapper [function] [call site] 00112
3 zxc_seek_decomp_size [function] [call site] 00113
2 calloc [call site] 00114
2 calloc [call site] 00115
2 calloc [call site] 00116
2 zxc_seek_frame_of_block [function] [call site] 00117
2 zxc_seek_spans_raw_max [function] [call site] 00118
2 zxc_seek_load_spans [function] [call site] 00119
2 zxc_seek_decomp_size [function] [call site] 00120
2 pthread_mutex_init [call site] 00121
2 pthread_create [call site] 00122
2 zxc_seek_mt_worker [function] [call site] 00123
3 pthread_mutex_lock [call site] 00124
3 pthread_mutex_unlock [call site] 00125
3 zxc_cctx_init [function] [call site] 00126
3 zxc_seek_mt_fail_stripe [function] [call site] 00127
3 zxc_cctx_free [function] [call site] 00128
3 zxc_seek_mt_fail_stripe [function] [call site] 00129
3 zxc_seek_read_block [function] [call site] 00130
3 zxc_seek_use_dict [function] [call site] 00131
3 zxc_decompress_chunk_wrapper [function] [call site] 00132
3 zxc_cctx_free [function] [call site] 00133
2 pthread_join [call site] 00134
2 pthread_mutex_destroy [call site] 00135
1 zxc_seekable_decompress_range [function] [call site] 00136
1 __assert_fail [call site] 00137
1 memcmp [call site] 00138
1 __assert_fail [call site] 00139
1 zxc_seekable_decompress_range [function] [call site] 00140
1 __assert_fail [call site] 00141
1 memcmp [call site] 00142
1 __assert_fail [call site] 00143
1 zxc_seekable_decompress_range [function] [call site] 00144
1 __assert_fail [call site] 00145
1 zxc_seekable_decompress_range [function] [call site] 00146
1 __assert_fail [call site] 00147
1 zxc_seekable_get_num_blocks [function] [call site] 00148
1 __assert_fail [call site] 00149
1 zxc_seekable_get_decompressed_size [function] [call site] 00150
1 __assert_fail [call site] 00151
1 zxc_seekable_free [function] [call site] 00152
1 zxc_seekable_open [function] [call site] 00153
1 zxc_seekable_get_decompressed_size [function] [call site] 00154
1 zxc_seekable_decompress_range [function] [call site] 00155
1 zxc_seekable_free [function] [call site] 00156