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: empty-file.cpp

Call tree

Runtime coverage analysis

Files reached

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.

empty-file.cpp

Dictionary

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

This section shows analysis of runtime coverage data.

Complex functions with low coverage

New fuzzers

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

avifiostatstest.cc

#include "ada_fuzz_header.h"

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

  /* target avif::GetIoStatsFromEncode */
  UNKNOWN_TYPE unknown_0;
  int new_var1 = ada_safe_get_int();
  int new_var2 = ada_safe_get_int();
  UNKNOWN_TYPE unknown_3;
  avif::GetIoStatsFromEncode(unknown_0, new_var1, new_var2, unknown_3);

  af_safe_gb_cleanup();
}

libavif_jni.cc

#include "ada_fuzz_header.h"

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

  /* target DecodeNthImage */
  UNKNOWN_TYPE unknown_4;
  UNKNOWN_TYPE unknown_5;
  UNKNOWN_TYPE unknown_6;
  UNKNOWN_TYPE unknown_7;
  DecodeNthImage(unknown_4, unknown_5, unknown_6, unknown_7);

  af_safe_gb_cleanup();
}

imageio.cc

#include "ada_fuzz_header.h"

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

  /* target avif::WriteImage */
  UNKNOWN_TYPE unknown_8;
  UNKNOWN_TYPE unknown_9;
  int new_var10 = ada_safe_get_int();
  int new_var11 = ada_safe_get_int();
  avif::WriteImage(unknown_8, unknown_9, new_var10, new_var11);

  af_safe_gb_cleanup();
}

codec_aom.c

#include "ada_fuzz_header.h"

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

  /* target aomCodecEncodeImage */
  UNKNOWN_TYPE unknown_12;
  UNKNOWN_TYPE unknown_13;
  UNKNOWN_TYPE unknown_14;
  UNKNOWN_TYPE unknown_15;
  int new_var16 = ada_safe_get_int();
  int new_var17 = ada_safe_get_int();
  int new_var18 = ada_safe_get_int();
  UNKNOWN_TYPE unknown_19;
  UNKNOWN_TYPE unknown_20;
  UNKNOWN_TYPE unknown_21;
  UNKNOWN_TYPE unknown_22;
  aomCodecEncodeImage(unknown_12, unknown_13, unknown_14, unknown_15, new_var16, new_var17, new_var18, unknown_19, unknown_20, unknown_21, unknown_22);

  af_safe_gb_cleanup();
}

avifenc.c

#include "ada_fuzz_header.h"

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

  /* target avifEncodeImages */
  UNKNOWN_TYPE unknown_23;
  UNKNOWN_TYPE unknown_24;
  UNKNOWN_TYPE unknown_25;
  UNKNOWN_TYPE unknown_26;
  UNKNOWN_TYPE unknown_27;
  UNKNOWN_TYPE unknown_28;
  UNKNOWN_TYPE unknown_29;
  avifEncodeImages(unknown_23, unknown_24, unknown_25, unknown_26, unknown_27, unknown_28, unknown_29);

  af_safe_gb_cleanup();
}

gainmap.c

#include "ada_fuzz_header.h"

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

  /* target avifImageComputeGainMap */
  UNKNOWN_TYPE unknown_30;
  UNKNOWN_TYPE unknown_31;
  UNKNOWN_TYPE unknown_32;
  UNKNOWN_TYPE unknown_33;
  avifImageComputeGainMap(unknown_30, unknown_31, unknown_32, unknown_33);

  af_safe_gb_cleanup();
}

codec_avm.c

#include "ada_fuzz_header.h"

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

  /* target avmCodecEncodeImage */
  UNKNOWN_TYPE unknown_34;
  UNKNOWN_TYPE unknown_35;
  UNKNOWN_TYPE unknown_36;
  UNKNOWN_TYPE unknown_37;
  int new_var38 = ada_safe_get_int();
  int new_var39 = ada_safe_get_int();
  int new_var40 = ada_safe_get_int();
  UNKNOWN_TYPE unknown_41;
  UNKNOWN_TYPE unknown_42;
  UNKNOWN_TYPE unknown_43;
  UNKNOWN_TYPE unknown_44;
  avmCodecEncodeImage(unknown_34, unknown_35, unknown_36, unknown_37, new_var38, new_var39, new_var40, unknown_41, unknown_42, unknown_43, unknown_44);

  af_safe_gb_cleanup();
}

avifgainmaptest.cc

#include "ada_fuzz_header.h"

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

  /* target avif::ToneMapImageAndCompareToReference */
  UNKNOWN_TYPE unknown_45;
  UNKNOWN_TYPE unknown_46;
  UNKNOWN_TYPE unknown_47;
  int new_var48 = ada_safe_get_int();
  UNKNOWN_TYPE unknown_49;
  UNKNOWN_TYPE unknown_50;
  UNKNOWN_TYPE unknown_51;
  UNKNOWN_TYPE unknown_52;
  UNKNOWN_TYPE unknown_53;
  avif::ToneMapImageAndCompareToReference(unknown_45, unknown_46, unknown_47, new_var48, unknown_49, unknown_50, unknown_51, unknown_52, unknown_53);

  af_safe_gb_cleanup();
}

codec_rav1e.c

#include "ada_fuzz_header.h"

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

  /* target rav1eCodecEncodeImage */
  UNKNOWN_TYPE unknown_54;
  UNKNOWN_TYPE unknown_55;
  UNKNOWN_TYPE unknown_56;
  UNKNOWN_TYPE unknown_57;
  int new_var58 = ada_safe_get_int();
  int new_var59 = ada_safe_get_int();
  int new_var60 = ada_safe_get_int();
  UNKNOWN_TYPE unknown_61;
  UNKNOWN_TYPE unknown_62;
  UNKNOWN_TYPE unknown_63;
  UNKNOWN_TYPE unknown_64;
  rav1eCodecEncodeImage(unknown_54, unknown_55, unknown_56, unknown_57, new_var58, new_var59, new_var60, unknown_61, unknown_62, unknown_63, unknown_64);

  af_safe_gb_cleanup();
}

avif_fuzztest_enc_dec_incr.cc

#include "ada_fuzz_header.h"

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

  /* target avif::testutil::EncodeDecodeGridValid */
  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;
  avif::testutil::EncodeDecodeGridValid(unknown_65, unknown_66, unknown_67, unknown_68, unknown_69, unknown_70, unknown_71);

  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