Fuzz introspector: compress12_lossless_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
458 458 1 :

['encode_one_block']

458 458 encode_mcu_huff call site: 00000 /src/libjpeg-turbo.3.0.x/jchuff.c:717
71 71 3 :

['j16init_downsampler', 'j16init_color_converter', 'j16init_c_prep_controller']

212 240 jinit_compress_master call site: 00186 /src/libjpeg-turbo.3.0.x/jcinit.c:43
36 36 7 :

['jinit_c_diff_controller', 'jinit_lhuff_encoder', 'jinit_lossless_compressor', 'j16init_c_diff_controller', 'j16init_lossless_compressor', 'j12init_lossless_compressor', 'j12init_c_diff_controller']

48 56 jinit_compress_master call site: 00242 /src/libjpeg-turbo.3.0.x/jcinit.c:64
8 8 1 :

['fill_scans']

8 20 jpeg_simple_progression call site: 00164 /src/libjpeg-turbo.3.0.x/jcparam.c:523
2 2 1 :

['fill_scans']

2 2 fill_dc_scans call site: 00165 /src/libjpeg-turbo.3.0.x/jcparam.c:454
0 7 1 :

['jpeg_default_colorspace']

8 55 jpeg_simple_progression call site: 00163 /src/libjpeg-turbo.3.0.x/jcparam.c:488
0 0 1 :

['emit_restart.1496']

458 473 encode_mcu_huff call site: 00000 /src/libjpeg-turbo.3.0.x/jchuff.c:709
0 0 None 24 24 start_pass_fdctmgr call site: 00000 /src/libjpeg-turbo.3.0.x/jcdctmgr.c:248
0 0 None 8 55 jpeg_simple_progression call site: 00163 /src/libjpeg-turbo.3.0.x/jcparam.c:484
0 0 None 8 48 jpeg_simple_progression call site: 00164 /src/libjpeg-turbo.3.0.x/jcparam.c:495
0 0 None 0 543 jpeg_start_compress call site: 00183 /src/libjpeg-turbo.3.0.x/jcapistd.c:46
0 0 None 0 494 encode_mcu call site: 00000 /src/libjpeg-turbo.3.0.x/jcarith.c:753

Fuzzer calltree

0 LLVMFuzzerTestOneInput [function] [call site] 00000
1 snprintf [call site] 00001
1 mkstemp [call site] 00002
1 write [call site] 00003
1 tj3Init [function] [call site] 00004
2 snprintf [call site] 00005
2 snprintf [call site] 00006
2 snprintf [call site] 00007
2 _tjInitCompress [function] [call site] 00008
3 jpeg_std_error [function] [call site] 00009
3 _setjmp [call site] 00010
3 jpeg_CreateCompress [function] [call site] 00011
4 jinit_memory_mgr [function] [call site] 00012
5 jpeg_mem_init [function] [call site] 00013
5 jpeg_get_small [function] [call site] 00014
5 jpeg_mem_term [function] [call site] 00015
5 __errno_location [call site] 00016
5 getenv [call site] 00017
5 strlen [call site] 00018
5 strncpy [call site] 00019
5 __isoc99_sscanf [call site] 00020
3 jpeg_mem_dest_tj [function] [call site] 00021
2 _tjInitDecompress [function] [call site] 00022
3 jpeg_std_error [function] [call site] 00023
3 _setjmp [call site] 00024
3 jpeg_CreateDecompress [function] [call site] 00025
4 jinit_memory_mgr [function] [call site] 00026
4 jinit_marker_reader [function] [call site] 00027
5 reset_marker_reader [function] [call site] 00028
4 jinit_input_controller [function] [call site] 00029
3 jpeg_mem_src_tj [function] [call site] 00030
2 _tjInitCompress [function] [call site] 00031
2 _tjInitDecompress [function] [call site] 00032
1 tj3Set [function] [call site] 00033
2 snprintf [call site] 00034
2 snprintf [call site] 00035
2 snprintf [call site] 00036
2 snprintf [call site] 00037
2 snprintf [call site] 00038
2 snprintf [call site] 00039
2 snprintf [call site] 00040
2 snprintf [call site] 00041
2 snprintf [call site] 00042
2 snprintf [call site] 00043
2 snprintf [call site] 00044
2 snprintf [call site] 00045
2 snprintf [call site] 00046
2 snprintf [call site] 00047
2 snprintf [call site] 00048
2 snprintf [call site] 00049
2 snprintf [call site] 00050
2 snprintf [call site] 00051
2 snprintf [call site] 00052
2 snprintf [call site] 00053
2 snprintf [call site] 00054
2 snprintf [call site] 00055
2 snprintf [call site] 00056
2 snprintf [call site] 00057
2 snprintf [call site] 00058
2 snprintf [call site] 00059
2 snprintf [call site] 00060
2 snprintf [call site] 00061
2 snprintf [call site] 00062
2 snprintf [call site] 00063
2 snprintf [call site] 00064
2 snprintf [call site] 00065
2 snprintf [call site] 00066
2 snprintf [call site] 00067
2 snprintf [call site] 00068
2 snprintf [call site] 00069
2 snprintf [call site] 00070
2 snprintf [call site] 00071
2 snprintf [call site] 00072
2 snprintf [call site] 00073
2 snprintf [call site] 00074
2 snprintf [call site] 00075
2 snprintf [call site] 00076
2 snprintf [call site] 00077
2 snprintf [call site] 00078
2 snprintf [call site] 00079
2 snprintf [call site] 00080
1 tj3Set [function] [call site] 00081
1 tj3Set [function] [call site] 00082
1 tj3Set [function] [call site] 00083
1 tj3Set [function] [call site] 00084
1 tj3Set [function] [call site] 00085
1 tj3Set [function] [call site] 00086
1 tj3LoadImage12 [function] [call site] 00087
2 snprintf [call site] 00088
2 snprintf [call site] 00089
2 snprintf [call site] 00090
2 tj3Init [function] [call site] 00091
2 fopen [call site] 00092
2 __errno_location [call site] 00093
2 strerror [call site] 00094
2 snprintf [call site] 00095
2 getc [call site] 00096
2 ungetc [call site] 00097
2 __errno_location [call site] 00098
2 strerror [call site] 00099
2 snprintf [call site] 00100
2 snprintf [call site] 00101
2 _setjmp [call site] 00102
2 jinit_read_bmp [function] [call site] 00103
2 snprintf [call site] 00104
2 j12init_read_ppm [function] [call site] 00105
2 snprintf [call site] 00106
2 snprintf [call site] 00107
2 snprintf [call site] 00108
2 _setjmp [call site] 00109
2 tj3Destroy [function] [call site] 00110
3 _setjmp [call site] 00111
3 jpeg_destroy_compress [function] [call site] 00112
4 jpeg_destroy [function] [call site] 00113
3 jpeg_destroy_decompress [function] [call site] 00114
4 jpeg_destroy [function] [call site] 00115
2 fclose [call site] 00116
1 tj3JPEGBufSize [function] [call site] 00117
2 snprintf [call site] 00118
1 tj3Get [function] [call site] 00119
1 tj3Alloc [function] [call site] 00120
1 tj3Set [function] [call site] 00121
1 tj3Set [function] [call site] 00122
1 tj3Compress12 [function] [call site] 00123
2 snprintf [call site] 00124
2 snprintf [call site] 00125
2 snprintf [call site] 00126
2 snprintf [call site] 00127
2 snprintf [call site] 00128
2 snprintf [call site] 00129
2 _setjmp [call site] 00130
2 setCompDefaults [function] [call site] 00131
3 jpeg_set_defaults [function] [call site] 00132
4 jpeg_set_quality [function] [call site] 00133
5 jpeg_quality_scaling [function] [call site] 00134
5 jpeg_set_linear_quality [function] [call site] 00135
6 jpeg_add_quant_table [function] [call site] 00136
7 jpeg_alloc_quant_table [function] [call site] 00137
6 jpeg_add_quant_table [function] [call site] 00138
4 std_huff_tables [function] [call site] 00139
5 add_huff_table [function] [call site] 00140
6 jpeg_alloc_huff_table [function] [call site] 00141
5 add_huff_table [function] [call site] 00142
5 add_huff_table [function] [call site] 00143
5 add_huff_table [function] [call site] 00144
4 jpeg_default_colorspace [function] [call site] 00145
5 jpeg_set_colorspace [function] [call site] 00146
5 jpeg_set_colorspace [function] [call site] 00147
5 jpeg_set_colorspace [function] [call site] 00148
5 jpeg_set_colorspace [function] [call site] 00149
5 jpeg_set_colorspace [function] [call site] 00150
5 jpeg_set_colorspace [function] [call site] 00151
5 jpeg_set_colorspace [function] [call site] 00152
3 jpeg_enable_lossless [function] [call site] 00153
3 jpeg_set_quality [function] [call site] 00154
3 jpeg_set_colorspace [function] [call site] 00155
3 jpeg_set_colorspace [function] [call site] 00156
3 jpeg_set_colorspace [function] [call site] 00157
3 jpeg_set_colorspace [function] [call site] 00158
3 jpeg_set_colorspace [function] [call site] 00159
3 jpeg_set_colorspace [function] [call site] 00160
3 jpeg_set_colorspace [function] [call site] 00161
3 jpeg_set_colorspace [function] [call site] 00162
3 jpeg_simple_progression [function] [call site] 00163
4 jpeg_default_colorspace [function] [call site] 00164
4 fill_dc_scans [function] [call site] 00165
5 fill_scans [function] [call site] 00166
4 fill_a_scan [function] [call site] 00167
4 fill_a_scan [function] [call site] 00168
4 fill_a_scan [function] [call site] 00169
4 fill_a_scan [function] [call site] 00170
4 fill_a_scan [function] [call site] 00171
4 fill_dc_scans [function] [call site] 00172
4 fill_a_scan [function] [call site] 00173
4 fill_a_scan [function] [call site] 00174
4 fill_a_scan [function] [call site] 00175
4 fill_dc_scans [function] [call site] 00176
4 fill_scans [function] [call site] 00177
4 fill_scans [function] [call site] 00178
4 fill_scans [function] [call site] 00179
4 fill_dc_scans [function] [call site] 00180
4 fill_scans [function] [call site] 00181
2 jpeg_mem_dest_tj [function] [call site] 00182
2 jpeg_start_compress [function] [call site] 00183
3 jpeg_suppress_tables [function] [call site] 00184
3 jinit_compress_master [function] [call site] 00185
4 jinit_c_master_control [function] [call site] 00186
5 validate_script [function] [call site] 00187
5 jpeg_default_colorspace [function] [call site] 00188
5 initial_setup [function] [call site] 00189
6 jdiv_round_up [function] [call site] 00190
6 jdiv_round_up [function] [call site] 00191
6 jdiv_round_up [function] [call site] 00192
6 jdiv_round_up [function] [call site] 00193
6 jdiv_round_up [function] [call site] 00194
5 using_std_huff_tables [function] [call site] 00195
6 memcmp [call site] 00196
6 memcmp [call site] 00197
6 memcmp [call site] 00198
6 memcmp [call site] 00199
6 memcmp [call site] 00200
6 memcmp [call site] 00201
6 memcmp [call site] 00202
6 memcmp [call site] 00203
4 jinit_color_converter [function] [call site] 00204
5 jsimd_can_rgb_gray [function] [call site] 00205
6 init_simd [function] [call site] 00206
7 jpeg_simd_cpu_support [call site] 00207
7 __errno_location [call site] 00208
7 getenv [call site] 00209
7 strlen [call site] 00210
7 strncpy [call site] 00211
7 strcmp [call site] 00212
7 __errno_location [call site] 00213
7 getenv [call site] 00214
7 strlen [call site] 00215
7 strncpy [call site] 00216
7 strcmp [call site] 00217
7 __errno_location [call site] 00218
7 getenv [call site] 00219
7 strlen [call site] 00220
7 strncpy [call site] 00221
7 strcmp [call site] 00222
7 __errno_location [call site] 00223
7 getenv [call site] 00224
7 strlen [call site] 00225
7 strncpy [call site] 00226
7 strcmp [call site] 00227
5 jsimd_can_rgb_ycc [function] [call site] 00228
6 init_simd [function] [call site] 00229
4 jinit_downsampler [function] [call site] 00230
5 jsimd_can_h2v1_downsample [function] [call site] 00231
6 init_simd [function] [call site] 00232
5 jsimd_can_h2v2_downsample [function] [call site] 00233
6 init_simd [function] [call site] 00234
4 jinit_c_prep_controller [function] [call site] 00235
5 create_context_buffer [function] [call site] 00236
4 j12init_color_converter [function] [call site] 00237
4 j12init_downsampler [function] [call site] 00238
4 j12init_c_prep_controller [function] [call site] 00239
4 j16init_color_converter [function] [call site] 00240
4 j16init_downsampler [function] [call site] 00241
4 j16init_c_prep_controller [function] [call site] 00242
4 jinit_lossless_compressor [function] [call site] 00243
4 j12init_lossless_compressor [function] [call site] 00244
4 j16init_lossless_compressor [function] [call site] 00245
4 jinit_lhuff_encoder [function] [call site] 00246
4 jinit_c_diff_controller [function] [call site] 00247
5 jround_up [function] [call site] 00248
5 jround_up [function] [call site] 00249
5 jround_up [function] [call site] 00250
5 jround_up [function] [call site] 00251
5 jround_up [function] [call site] 00252
5 jround_up [function] [call site] 00253
4 j12init_c_diff_controller [function] [call site] 00254
4 j16init_c_diff_controller [function] [call site] 00255
4 jinit_forward_dct [function] [call site] 00256
5 jsimd_can_fdct_islow [function] [call site] 00257
6 init_simd [function] [call site] 00258
5 jsimd_can_fdct_ifast [function] [call site] 00259
6 init_simd [function] [call site] 00260
5 jsimd_can_fdct_float [function] [call site] 00261
6 init_simd [function] [call site] 00262
5 jsimd_can_convsamp [function] [call site] 00263
6 init_simd [function] [call site] 00264
5 jsimd_can_quantize [function] [call site] 00265
6 init_simd [function] [call site] 00266
5 jsimd_can_convsamp_float [function] [call site] 00267
6 init_simd [function] [call site] 00268
5 jsimd_can_quantize_float [function] [call site] 00269
6 init_simd [function] [call site] 00270
4 j12init_forward_dct [function] [call site] 00271
4 jinit_arith_encoder [function] [call site] 00272
4 jinit_phuff_encoder [function] [call site] 00273
4 jinit_huff_encoder [function] [call site] 00274
4 j12init_c_coef_controller [function] [call site] 00275
5 jround_up [function] [call site] 00276
5 jround_up [function] [call site] 00277
4 jinit_c_coef_controller [function] [call site] 00278
4 jinit_c_main_controller [function] [call site] 00279
4 j12init_c_main_controller [function] [call site] 00280
4 j16init_c_main_controller [function] [call site] 00281
4 jinit_marker_writer [function] [call site] 00282
2 jpeg_write_icc_profile [function] [call site] 00283
3 jpeg_write_m_header [function] [call site] 00284
3 jpeg_write_m_byte [function] [call site] 00285
3 jpeg_write_m_byte [function] [call site] 00286
3 jpeg_write_m_byte [function] [call site] 00287
3 jpeg_write_m_byte [function] [call site] 00288
3 jpeg_write_m_byte [function] [call site] 00289
3 jpeg_write_m_byte [function] [call site] 00290
3 jpeg_write_m_byte [function] [call site] 00291
3 jpeg_write_m_byte [function] [call site] 00292
3 jpeg_write_m_byte [function] [call site] 00293
3 jpeg_write_m_byte [function] [call site] 00294
3 jpeg_write_m_byte [function] [call site] 00295
3 jpeg_write_m_byte [function] [call site] 00296
3 jpeg_write_m_byte [function] [call site] 00297
3 jpeg_write_m_byte [function] [call site] 00298
3 jpeg_write_m_byte [function] [call site] 00299
2 jpeg12_write_scanlines [function] [call site] 00300
2 jpeg_finish_compress [function] [call site] 00301
3 jpeg_abort [function] [call site] 00302
2 jpeg_abort_compress [function] [call site] 00303
3 jpeg_abort [function] [call site] 00304
1 tj3Free [function] [call site] 00305
1 tj3Free [function] [call site] 00306
1 close [call site] 00307
1 strlen [call site] 00308
1 unlink [call site] 00309
1 tj3Destroy [function] [call site] 00310