Fuzz introspector: dct_fuzzer
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
56 99 init_simd call site: 00099 jinit_forward_dct
32 50 std_huff_tables call site: 00050 jpeg_start_compress
30 156 unsigned int QIntC::to_uint (int const&) call site: 00156 jpeg_finish_compress
19 233 master_selection call site: 00233 jinit_1pass_quantizer
11 34 jinit_memory_mgr call site: 00034 jpeg_set_defaults
9 209 jpeg_core_output_dimensions call site: 00209 jdiv_round_up
7 201 jpeg_calc_output_dimensions call site: 00201 jdiv_round_up
5 12 Pl_DCT::Pl_DCT(char const*, Pipeline*) call site: 00012 __cxa_allocate_exception
3 25 Pl_DCT::finish() call site: 00025 jpeg_CreateCompress
3 257 jinit_color_deconverter call site: 00257 jsimd_can_ycc_rgb565
2 310 Pl_DCT::finish() call site: 00310 jpeg_destroy_compress
1 20 FuzzHelper::doChecks() call site: 00020

Fuzzer calltree

0 LLVMFuzzerTestOneInput [function] [call site] 00000
1 setenv [call site] 00001
1 FuzzHelper::FuzzHelper(unsigned char const*, unsigned long) [function] [call site] 00002
1 FuzzHelper::run() [function] [call site] 00003
2 FuzzHelper::doChecks() [function] [call site] 00004
3 Pl_DCT::setMemoryLimit(long) [function] [call site] 00005
3 Pl_DCT::setScanLimit(int) [function] [call site] 00006
3 Pl_DCT::setThrowOnCorruptData(bool) [function] [call site] 00007
3 Pl_Discard::Pl_Discard() [function] [call site] 00008
4 Pipeline::Pipeline(char const*, Pipeline*) [function] [call site] 00009
3 Pl_DCT::Pl_DCT(char const*, Pipeline*) [function] [call site] 00010
4 Pipeline::Pipeline(char const*, Pipeline*) [function] [call site] 00011
4 void qpdf::util::assertion<char const (&) [46]>(bool, char const (&) [46]) [function] [call site] 00012
5 __cxa_allocate_exception [call site] 00013
5 std::logic_error::logic_error(char const*) [call site] 00014
5 __cxa_throw [call site] 00015
5 std::logic_error::~logic_error() [call site] 00016
5 __cxa_free_exception [call site] 00017
4 Pipeline::~Pipeline() [function] [call site] 00018
3 Pl_DCT::write(unsigned char const*, unsigned long) [function] [call site] 00019
3 Pl_DCT::finish() [function] [call site] 00020
4 Pipeline::next() const [function] [call site] 00021
4 (anonymous namespace)::qpdf_jpeg_error_mgr::qpdf_jpeg_error_mgr() [function] [call site] 00022
4 jpeg_std_error [function] [call site] 00023
4 jpeg_std_error [function] [call site] 00024
4 _setjmp [call site] 00025
4 Pl_DCT::compress(void*) [function] [call site] 00026
5 jpeg_CreateCompress [function] [call site] 00027
6 jinit_memory_mgr [function] [call site] 00028
7 jpeg_mem_init [function] [call site] 00029
7 jpeg_get_small [function] [call site] 00030
7 jpeg_mem_term [function] [call site] 00031
7 getenv [call site] 00032
7 strlen [call site] 00033
7 strncpy [call site] 00034
7 __isoc99_sscanf [call site] 00035
5 Pipeline::next() const [function] [call site] 00036
5 jpeg_pipeline_dest(jpeg_compress_struct*, unsigned char*, unsigned long, Pipeline*) [function] [call site] 00037
5 jpeg_set_defaults [function] [call site] 00038
6 jpeg_set_quality [function] [call site] 00039
7 jpeg_quality_scaling [function] [call site] 00040
7 jpeg_set_linear_quality [function] [call site] 00041
8 jpeg_add_quant_table [function] [call site] 00042
9 jpeg_alloc_quant_table [function] [call site] 00043
8 jpeg_add_quant_table [function] [call site] 00044
6 std_huff_tables [function] [call site] 00045
7 add_huff_table [function] [call site] 00046
8 jpeg_alloc_huff_table [function] [call site] 00047
7 add_huff_table [function] [call site] 00048
7 add_huff_table [function] [call site] 00049
7 add_huff_table [function] [call site] 00050
6 jpeg_default_colorspace [function] [call site] 00051
7 jpeg_set_colorspace [function] [call site] 00052
7 jpeg_set_colorspace [function] [call site] 00053
7 jpeg_set_colorspace [function] [call site] 00054
7 jpeg_set_colorspace [function] [call site] 00055
7 jpeg_set_colorspace [function] [call site] 00056
7 jpeg_set_colorspace [function] [call site] 00057
7 jpeg_set_colorspace [function] [call site] 00058
5 jpeg_start_compress [function] [call site] 00059
6 jpeg_suppress_tables [function] [call site] 00060
6 jinit_compress_master [function] [call site] 00061
7 jinit_c_master_control [function] [call site] 00062
8 validate_script [function] [call site] 00063
8 jpeg_default_colorspace [function] [call site] 00064
8 initial_setup [function] [call site] 00065
9 jdiv_round_up [function] [call site] 00066
9 jdiv_round_up [function] [call site] 00067
9 jdiv_round_up [function] [call site] 00068
9 jdiv_round_up [function] [call site] 00069
9 jdiv_round_up [function] [call site] 00070
8 using_std_huff_tables [function] [call site] 00071
9 memcmp [call site] 00072
9 memcmp [call site] 00073
9 memcmp [call site] 00074
9 memcmp [call site] 00075
9 memcmp [call site] 00076
9 memcmp [call site] 00077
9 memcmp [call site] 00078
9 memcmp [call site] 00079
7 jinit_color_converter [function] [call site] 00080
8 jsimd_can_rgb_gray [function] [call site] 00081
9 init_simd [function] [call site] 00082
10 jpeg_simd_cpu_support [call site] 00083
10 getenv [call site] 00084
10 strlen [call site] 00085
10 strncpy [call site] 00086
10 strcmp [call site] 00087
10 getenv [call site] 00088
10 strlen [call site] 00089
10 strncpy [call site] 00090
10 strcmp [call site] 00091
10 getenv [call site] 00092
10 strlen [call site] 00093
10 strncpy [call site] 00094
10 strcmp [call site] 00095
10 getenv [call site] 00096
10 strlen [call site] 00097
10 strncpy [call site] 00098
10 strcmp [call site] 00099
8 jsimd_can_rgb_ycc [function] [call site] 00100
9 init_simd [function] [call site] 00101
7 jinit_downsampler [function] [call site] 00102
8 jsimd_can_h2v1_downsample [function] [call site] 00103
9 init_simd [function] [call site] 00104
8 jsimd_can_h2v2_downsample [function] [call site] 00105
9 init_simd [function] [call site] 00106
7 jinit_c_prep_controller [function] [call site] 00107
8 create_context_buffer [function] [call site] 00108
7 j12init_color_converter [function] [call site] 00109
7 j12init_downsampler [function] [call site] 00110
7 j12init_c_prep_controller [function] [call site] 00111
7 j16init_color_converter [function] [call site] 00112
7 j16init_downsampler [function] [call site] 00113
7 j16init_c_prep_controller [function] [call site] 00114
7 jinit_lossless_compressor [function] [call site] 00115
7 j12init_lossless_compressor [function] [call site] 00116
7 j16init_lossless_compressor [function] [call site] 00117
7 jinit_lhuff_encoder [function] [call site] 00118
7 jinit_c_diff_controller [function] [call site] 00119
8 jround_up [function] [call site] 00120
8 jround_up [function] [call site] 00121
8 jround_up [function] [call site] 00122
8 jround_up [function] [call site] 00123
8 jround_up [function] [call site] 00124
8 jround_up [function] [call site] 00125
7 j12init_c_diff_controller [function] [call site] 00126
7 j16init_c_diff_controller [function] [call site] 00127
7 jinit_forward_dct [function] [call site] 00128
8 jsimd_can_fdct_islow [function] [call site] 00129
9 init_simd [function] [call site] 00130
8 jsimd_can_fdct_ifast [function] [call site] 00131
9 init_simd [function] [call site] 00132
8 jsimd_can_fdct_float [function] [call site] 00133
9 init_simd [function] [call site] 00134
8 jsimd_can_convsamp [function] [call site] 00135
9 init_simd [function] [call site] 00136
8 jsimd_can_quantize [function] [call site] 00137
9 init_simd [function] [call site] 00138
8 jsimd_can_convsamp_float [function] [call site] 00139
9 init_simd [function] [call site] 00140
8 jsimd_can_quantize_float [function] [call site] 00141
9 init_simd [function] [call site] 00142
7 j12init_forward_dct [function] [call site] 00143
7 jinit_arith_encoder [function] [call site] 00144
7 jinit_phuff_encoder [function] [call site] 00145
7 jinit_huff_encoder [function] [call site] 00146
7 j12init_c_coef_controller [function] [call site] 00147
8 jround_up [function] [call site] 00148
8 jround_up [function] [call site] 00149
7 jinit_c_coef_controller [function] [call site] 00150
7 jinit_c_main_controller [function] [call site] 00151
7 j12init_c_main_controller [function] [call site] 00152
7 j16init_c_main_controller [function] [call site] 00153
7 jinit_marker_writer [function] [call site] 00154
5 unsigned int QIntC::to_uint<int>(int const&) [function] [call site] 00155
6 QIntC::IntConverter<int, unsigned int, true, false>::convert(int const&) [function] [call site] 00156
7 QIntC::IntConverter<int, unsigned int, true, false>::error(int) [function] [call site] 00157
8 __cxa_allocate_exception [call site] 00158
8 std::__1::basic_ostringstream<char, std::__1::char_traits<char>, std::__1::allocator<char> >::str[abi:ne220000]() const & [function] [call site] 00159
9 std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::str[abi:ne220000]() const & [function] [call site] 00160
8 std::range_error::range_error[abi:ne220000](std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) [function] [call site] 00161
9 std::runtime_error::runtime_error(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) [call site] 00162
8 __cxa_throw [call site] 00163
8 __cxa_free_exception [call site] 00164
5 unsigned long QIntC::to_size<unsigned int>(unsigned int const&) [function] [call site] 00165
6 QIntC::IntConverter<unsigned int, unsigned long, false, false>::convert(unsigned int const&) [function] [call site] 00166
7 QIntC::IntConverter<unsigned int, unsigned long, false, false>::error(unsigned int) [function] [call site] 00167
8 __cxa_allocate_exception [call site] 00168
8 std::__1::basic_ostringstream<char, std::__1::char_traits<char>, std::__1::allocator<char> >::str[abi:ne220000]() const & [function] [call site] 00169
8 std::range_error::range_error[abi:ne220000](std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) [function] [call site] 00170
8 __cxa_throw [call site] 00171
8 __cxa_free_exception [call site] 00172
5 unsigned long QIntC::to_size<unsigned int>(unsigned int const&) [function] [call site] 00173
5 unsigned long QIntC::to_size<int>(int const&) [function] [call site] 00174
6 QIntC::IntConverter<int, unsigned long, true, false>::convert(int const&) [function] [call site] 00175
7 QIntC::IntConverter<int, unsigned long, true, false>::error(int) [function] [call site] 00176
5 void qpdf::util::no_ci_rt_error_if<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >(bool, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >&&) [function] [call site] 00177
6 __cxa_allocate_exception [call site] 00178
6 std::runtime_error::runtime_error(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) [call site] 00179
6 __cxa_throw [call site] 00180
6 std::runtime_error::~runtime_error() [call site] 00181
6 __cxa_free_exception [call site] 00182
5 jpeg_write_scanlines [function] [call site] 00183
5 jpeg_finish_compress [function] [call site] 00184
6 jpeg_abort [function] [call site] 00185
5 Pipeline::next() const [function] [call site] 00186
4 __cxa_begin_catch [call site] 00187
4 longjmp [call site] 00188
4 Pl_DCT::decompress(void*) [function] [call site] 00189
5 jpeg_CreateDecompress [function] [call site] 00190
6 jinit_memory_mgr [function] [call site] 00191
6 jinit_marker_reader [function] [call site] 00192
7 reset_marker_reader [function] [call site] 00193
6 jinit_input_controller [function] [call site] 00194
5 jpeg_buffer_src(jpeg_decompress_struct*, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >&) [function] [call site] 00195
5 jpeg_read_header [function] [call site] 00196
6 jpeg_consume_input [function] [call site] 00197
7 default_decompress_parms [function] [call site] 00198
6 jpeg_abort [function] [call site] 00199
5 jpeg_calc_output_dimensions [function] [call site] 00200
6 jpeg_core_output_dimensions [function] [call site] 00201
7 jdiv_round_up [function] [call site] 00202
7 jdiv_round_up [function] [call site] 00203
7 jdiv_round_up [function] [call site] 00204
7 jdiv_round_up [function] [call site] 00205
7 jdiv_round_up [function] [call site] 00206
7 jdiv_round_up [function] [call site] 00207
7 jdiv_round_up [function] [call site] 00208
7 jdiv_round_up [function] [call site] 00209
7 jdiv_round_up [function] [call site] 00210
7 jdiv_round_up [function] [call site] 00211
7 jdiv_round_up [function] [call site] 00212
7 jdiv_round_up [function] [call site] 00213
7 jdiv_round_up [function] [call site] 00214
7 jdiv_round_up [function] [call site] 00215
7 jdiv_round_up [function] [call site] 00216
7 jdiv_round_up [function] [call site] 00217
7 jdiv_round_up [function] [call site] 00218
6 jdiv_round_up [function] [call site] 00219
6 jdiv_round_up [function] [call site] 00220
6 use_merged_upsample [function] [call site] 00221
5 unsigned int QIntC::to_uint<int>(int const&) [function] [call site] 00222
5 __cxa_allocate_exception [call site] 00223
5 std::runtime_error::runtime_error(char const*) [call site] 00224
5 __cxa_throw [call site] 00225
5 std::runtime_error::~runtime_error() [call site] 00226
5 __cxa_free_exception [call site] 00227
5 jpeg_start_decompress [function] [call site] 00228
6 jinit_master_decompress [function] [call site] 00229
7 master_selection [function] [call site] 00230
8 jpeg_calc_output_dimensions [function] [call site] 00231
8 prepare_range_limit_table [function] [call site] 00232
8 use_merged_upsample [function] [call site] 00233
8 jinit_1pass_quantizer [function] [call site] 00234
9 create_colormap [function] [call site] 00235
10 select_ncolors [function] [call site] 00236
10 output_value [function] [call site] 00237
9 create_colorindex [function] [call site] 00238
10 largest_input_value [function] [call site] 00239
10 largest_input_value [function] [call site] 00240
9 alloc_fs_workspace [function] [call site] 00241
8 j12init_1pass_quantizer [function] [call site] 00242
8 jinit_2pass_quantizer [function] [call site] 00243
9 init_error_limit [function] [call site] 00244
8 j12init_2pass_quantizer [function] [call site] 00245
8 jinit_merged_upsampler [function] [call site] 00246
9 jsimd_can_h2v2_merged_upsample [function] [call site] 00247
10 init_simd [function] [call site] 00248
9 jsimd_can_h2v1_merged_upsample [function] [call site] 00249
10 init_simd [function] [call site] 00250
9 build_ycc_rgb_table [function] [call site] 00251
8 j12init_merged_upsampler [function] [call site] 00252
8 jinit_color_deconverter [function] [call site] 00253
9 build_rgb_y_table [function] [call site] 00254
9 jsimd_can_ycc_rgb [function] [call site] 00255
10 init_simd [function] [call site] 00256
9 build_ycc_rgb_table [function] [call site] 00257
9 jsimd_can_ycc_rgb565 [function] [call site] 00258
9 build_ycc_rgb_table [function] [call site] 00259
9 build_ycc_rgb_table [function] [call site] 00260
9 build_ycc_rgb_table [function] [call site] 00261
8 jinit_upsampler [function] [call site] 00262
9 jsimd_can_h2v1_fancy_upsample [function] [call site] 00263
10 init_simd [function] [call site] 00264
9 jsimd_can_h2v1_upsample [function] [call site] 00265
10 init_simd [function] [call site] 00266
9 jsimd_can_h2v2_fancy_upsample [function] [call site] 00267
10 init_simd [function] [call site] 00268
9 jsimd_can_h2v2_upsample [function] [call site] 00269
10 init_simd [function] [call site] 00270
9 jround_up [function] [call site] 00271
8 j12init_color_deconverter [function] [call site] 00272
8 j12init_upsampler [function] [call site] 00273
8 j16init_color_deconverter [function] [call site] 00274
8 j16init_upsampler [function] [call site] 00275
8 jinit_d_post_controller [function] [call site] 00276
9 jround_up [function] [call site] 00277
8 j12init_d_post_controller [function] [call site] 00278
8 j16init_d_post_controller [function] [call site] 00279
8 jinit_lossless_decompressor [function] [call site] 00280
8 j12init_lossless_decompressor [function] [call site] 00281
8 j16init_lossless_decompressor [function] [call site] 00282
8 jinit_lhuff_decoder [function] [call site] 00283
8 jinit_d_diff_controller [function] [call site] 00284
9 jround_up [function] [call site] 00285
9 jround_up [function] [call site] 00286
9 jround_up [function] [call site] 00287
8 j12init_d_diff_controller [function] [call site] 00288
8 j16init_d_diff_controller [function] [call site] 00289
8 jinit_inverse_dct [function] [call site] 00290
8 j12init_inverse_dct [function] [call site] 00291
8 jinit_arith_decoder [function] [call site] 00292
8 jinit_phuff_decoder [function] [call site] 00293
8 jinit_huff_decoder [function] [call site] 00294
9 std_huff_tables [function] [call site] 00295
8 j12init_d_coef_controller [function] [call site] 00296
9 jround_up [function] [call site] 00297
9 jround_up [function] [call site] 00298
8 jinit_d_coef_controller [function] [call site] 00299
8 jinit_d_main_controller [function] [call site] 00300
9 alloc_funny_pointers [function] [call site] 00301
8 j12init_d_main_controller [function] [call site] 00302
8 j16init_d_main_controller [function] [call site] 00303
6 output_pass_setup [function] [call site] 00304
5 jpeg_read_scanlines [function] [call site] 00305
5 Pipeline::next() const [function] [call site] 00306
5 jpeg_finish_decompress [function] [call site] 00307
6 jpeg_abort [function] [call site] 00308
5 Pipeline::next() const [function] [call site] 00309
4 __cxa_end_catch [call site] 00310
4 jpeg_destroy_compress [function] [call site] 00311
5 jpeg_destroy [function] [call site] 00312
4 jpeg_destroy_decompress [function] [call site] 00313
5 jpeg_destroy [function] [call site] 00314
4 __cxa_allocate_exception [call site] 00315
4 std::runtime_error::runtime_error(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) [call site] 00316
4 __cxa_throw [call site] 00317
4 __cxa_free_exception [call site] 00318
4 (anonymous namespace)::qpdf_jpeg_error_mgr::~qpdf_jpeg_error_mgr() [function] [call site] 00319
4 __clang_call_terminate [call site] 00320
5 __cxa_begin_catch [call site] 00321
3 Pl_DCT::~Pl_DCT() [function] [call site] 00322
4 Pipeline::~Pipeline() [function] [call site] 00323
3 Pl_Discard::~Pl_Discard() [function] [call site] 00324
4 Pipeline::~Pipeline() [function] [call site] 00325
2 __cxa_begin_catch [call site] 00326
2 __cxa_end_catch [call site] 00327
2 __clang_call_terminate [call site] 00328