High level conclusions

Reachability and coverage overview

The following table shows data about each function in the project. The functions included in this table correspond to all functions that exist in the executables of the fuzzers. As such, there may be functions that are from third-party libraries.

Fuzzer: tests/opus_encode_fuzzer.cc

Call tree

Fuzzer: tests/opus_projection_encoder_fuzzer.cc

Call tree

Fuzzer: tests/opus_repacketizer_fuzzer.cc

Call tree

Fuzzer: tests/opus_multistream_decode_fuzzer.cc

Call tree

Fuzzer: tests/opus_decode_fuzzer.c

Call tree

Fuzzer: tests/opus_projection_decoder_fuzzer.cc

Call tree

Fuzzer: tests/opus_multistream_encode_fuzzer.cc

Call tree

Optimal target analysis

Remaining optimal interesting functions

The following table shows a list of functions that are optimal targets. Optimal targets are identified by finding the functions that in combination, yield a high code coverage.

Implementing fuzzers that target the above functions will improve reachability such that it becomes:

All functions overview

If you implement fuzzers for these functions, the status of all functions in the project will be:

This sections provides heuristics that can be used as input to a fuzz engine when running a given fuzz target. The current focus is on providing input that is usable by libFuzzer.

tests/opus_encode_fuzzer.cc

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

tests/opus_projection_encoder_fuzzer.cc

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

tests/opus_repacketizer_fuzzer.cc

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

tests/opus_multistream_decode_fuzzer.cc

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

tests/opus_decode_fuzzer.c

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

tests/opus_projection_decoder_fuzzer.cc

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

tests/opus_multistream_encode_fuzzer.cc

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

New fuzzers

The below fuzzers are templates and suggestions for how to target the set of optimal functions above

opus_encoder.c

#include "ada_fuzz_header.h"

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
  af_safe_gb_init(data, size);

  /* target opus_encode_frame_native */
  UNKNOWN_TYPE unknown_0;
  UNKNOWN_TYPE unknown_1;
  int new_var2 = ada_safe_get_int();
  UNKNOWN_TYPE unknown_3;
  UNKNOWN_TYPE unknown_4;
  int new_var5 = ada_safe_get_int();
  int new_var6 = ada_safe_get_int();
  UNKNOWN_TYPE unknown_7;
  UNKNOWN_TYPE unknown_8;
  int new_var9 = ada_safe_get_int();
  int new_var10 = ada_safe_get_int();
  int new_var11 = ada_safe_get_int();
  int new_var12 = ada_safe_get_int();
  UNKNOWN_TYPE unknown_13;
  int new_var14 = ada_safe_get_int();
  opus_encode_frame_native(unknown_0, unknown_1, new_var2, unknown_3, unknown_4, new_var5, new_var6, unknown_7, unknown_8, new_var9, new_var10, new_var11, new_var12, unknown_13, new_var14);

  af_safe_gb_cleanup();
}

dec_API.c

#include "ada_fuzz_header.h"

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
  af_safe_gb_init(data, size);

  /* target silk_Decode */
  UNKNOWN_TYPE unknown_15;
  UNKNOWN_TYPE unknown_16;
  UNKNOWN_TYPE unknown_17;
  UNKNOWN_TYPE unknown_18;
  UNKNOWN_TYPE unknown_19;
  UNKNOWN_TYPE unknown_20;
  UNKNOWN_TYPE unknown_21;
  UNKNOWN_TYPE unknown_22;
  int new_var23 = ada_safe_get_int();
  silk_Decode(unknown_15, unknown_16, unknown_17, unknown_18, unknown_19, unknown_20, unknown_21, unknown_22, new_var23);

  af_safe_gb_cleanup();
}

encode_frame_FIX.c

#include "ada_fuzz_header.h"

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
  af_safe_gb_init(data, size);

  /* target silk_encode_frame_FIX */
  UNKNOWN_TYPE unknown_24;
  UNKNOWN_TYPE unknown_25;
  UNKNOWN_TYPE unknown_26;
  UNKNOWN_TYPE unknown_27;
  UNKNOWN_TYPE unknown_28;
  UNKNOWN_TYPE unknown_29;
  silk_encode_frame_FIX(unknown_24, unknown_25, unknown_26, unknown_27, unknown_28, unknown_29);

  af_safe_gb_cleanup();
}

bands.c

#include "ada_fuzz_header.h"

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
  af_safe_gb_init(data, size);

  /* target quant_all_bands */
  int new_var30 = ada_safe_get_int();
  UNKNOWN_TYPE unknown_31;
  int new_var32 = ada_safe_get_int();
  int new_var33 = ada_safe_get_int();
  UNKNOWN_TYPE unknown_34;
  UNKNOWN_TYPE unknown_35;
  UNKNOWN_TYPE unknown_36;
  UNKNOWN_TYPE unknown_37;
  int *new_var38 = af_get_int_p();
  int new_var39 = ada_safe_get_int();
  int new_var40 = ada_safe_get_int();
  int new_var41 = ada_safe_get_int();
  int new_var42 = ada_safe_get_int();
  int *new_var43 = af_get_int_p();
  UNKNOWN_TYPE unknown_44;
  UNKNOWN_TYPE unknown_45;
  UNKNOWN_TYPE unknown_46;
  int new_var47 = ada_safe_get_int();
  int new_var48 = ada_safe_get_int();
  UNKNOWN_TYPE unknown_49;
  int new_var50 = ada_safe_get_int();
  int new_var51 = ada_safe_get_int();
  int new_var52 = ada_safe_get_int();
  quant_all_bands(new_var30, unknown_31, new_var32, new_var33, unknown_34, unknown_35, unknown_36, unknown_37, new_var38, new_var39, new_var40, new_var41, new_var42, new_var43, unknown_44, unknown_45, unknown_46, new_var47, new_var48, unknown_49, new_var50, new_var51, new_var52);

  af_safe_gb_cleanup();
}

encode_frame_FLP.c

#include "ada_fuzz_header.h"

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
  af_safe_gb_init(data, size);

  /* target silk_encode_frame_FLP */
  UNKNOWN_TYPE unknown_53;
  UNKNOWN_TYPE unknown_54;
  UNKNOWN_TYPE unknown_55;
  UNKNOWN_TYPE unknown_56;
  UNKNOWN_TYPE unknown_57;
  UNKNOWN_TYPE unknown_58;
  silk_encode_frame_FLP(unknown_53, unknown_54, unknown_55, unknown_56, unknown_57, unknown_58);

  af_safe_gb_cleanup();
}

test_opus_encode.c

#include "ada_fuzz_header.h"

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
  af_safe_gb_init(data, size);

  /* target run_test1 */
  int new_var59 = ada_safe_get_int();
  run_test1(new_var59);

  af_safe_gb_cleanup();
}

NSQ_del_dec_neon_intr.c

#include "ada_fuzz_header.h"

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
  af_safe_gb_init(data, size);

  /* target silk_NSQ_del_dec_neon */
  UNKNOWN_TYPE unknown_60;
  UNKNOWN_TYPE unknown_61;
  UNKNOWN_TYPE unknown_62;
  UNKNOWN_TYPE unknown_63;
  UNKNOWN_TYPE unknown_64;
  UNKNOWN_TYPE unknown_65;
  UNKNOWN_TYPE unknown_66;
  UNKNOWN_TYPE unknown_67;
  UNKNOWN_TYPE unknown_68;
  UNKNOWN_TYPE unknown_69;
  UNKNOWN_TYPE unknown_70;
  UNKNOWN_TYPE unknown_71;
  UNKNOWN_TYPE unknown_72;
  UNKNOWN_TYPE unknown_73;
  UNKNOWN_TYPE unknown_74;
  silk_NSQ_del_dec_neon(unknown_60, unknown_61, unknown_62, unknown_63, unknown_64, unknown_65, unknown_66, unknown_67, unknown_68, unknown_69, unknown_70, unknown_71, unknown_72, unknown_73, unknown_74);

  af_safe_gb_cleanup();
}

analysis.c

#include "ada_fuzz_header.h"

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
  af_safe_gb_init(data, size);

  /* target run_analysis */
  UNKNOWN_TYPE unknown_75;
  UNKNOWN_TYPE unknown_76;
  UNKNOWN_TYPE unknown_77;
  int new_var78 = ada_safe_get_int();
  int new_var79 = ada_safe_get_int();
  int new_var80 = ada_safe_get_int();
  int new_var81 = ada_safe_get_int();
  int new_var82 = ada_safe_get_int();
  UNKNOWN_TYPE unknown_83;
  int new_var84 = ada_safe_get_int();
  UNKNOWN_TYPE unknown_85;
  UNKNOWN_TYPE unknown_86;
  run_analysis(unknown_75, unknown_76, unknown_77, new_var78, new_var79, new_var80, new_var81, new_var82, unknown_83, new_var84, unknown_85, unknown_86);

  af_safe_gb_cleanup();
}

dred_compare.c

#include "ada_fuzz_header.h"

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
  af_safe_gb_init(data, size);

  /* target compare_audio */
  int new_var87 = ada_safe_get_int();
  char **new_var88 = af_get_double_char_p();
  char *new_var89 = ada_safe_get_char_p();
  compare_audio(new_var87, new_var88, new_var89);

  af_safe_gb_cleanup();
}

test_opus_decode.c

#include "ada_fuzz_header.h"

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
  af_safe_gb_init(data, size);

  /* target test_decoder_code0 */
  int new_var90 = ada_safe_get_int();
  test_decoder_code0(new_var90);

  af_safe_gb_cleanup();
}

Files in report

Directories in report

This section shows a list of 3rd party function calls and their relative coverage information. By static analysis of the target project code, all of the 3rd party function call and their caller information, including the source file and line number that initiate the call are captured. The caller source code file and line number are shown in column 2 while column 1 is the function name of the 3rd party function call. Each occurrent of the 3rd party function call will occuply a separate row. Column 3 of each row indicate if the 3rd party call in the source file line is unreachable. Column 4 lists all fuzzers that have covered that particular system call in that specific location (source file and line)during their dynamic fuzzing.

Function in each files in report