Project: libpng-proto

Language c++
OSS-Fuzz project link
Project repository link
Build status: Fuzzers succeeding: Build log
Build status: Code coverage succeeding: Build log
Build status: Fuzz Introspector succeeding: Build log
Fuzzer count 4
Lines of code 38534
Lines covered 9860
Code coverage 25.59%
Code coverage report Report link
Static reachability 50.07%
Fuzz Introspector report Report link (from 2025-03-27)
Fuzzer Code coverage (lines) Latest Report Comments
png_custom_mutator_fuzzer_example 41.69% (avg: 41.68%, max: 41.69%) 2025-03-27
png_proto_fuzzer_example 16.01% (avg: 16.0%, max: 16.01%) 2025-03-27
png_proto_fuzzer_example_custom_mutator 16.15% (avg: 16.14%, max: 16.15%) 2025-03-27
png_transforms_fuzzer 68.48% (avg: 68.47%, max: 68.48%) 2025-03-27

Historical Progression

Per Fuzzer Progression

Functions of interest to fuzz

This section outlines functions that may be of interest to fuzz. They are based on ranking functions that have a lot of complexity but currently exhibit low code coverage. The complexity is calculated based on the function itself as well as the functions called by the given function, i.e. the tree of code that the function triggers.


This is only a minor amount of introspection information available for this project. Please consult the Fuzz Introspector report for more information, e.g. the introspection table of all functions in the target project available here.

Function name Function source file Accumulated cyclomatic complexity Code coverage
TestOneProtoInput(PngProtoconst&) /src/png_proto_fuzzer_example.cc 2245 0.0%
FuzzPNG /src/libpng/contrib/oss-fuzz/libpng_read_fuzzer.cc 2037 0.0%
OSS_FUZZ_png_image_finish_read /src/libpng/pngread.c 1505 0.0%
OSS_FUZZ_png_read_png /src/libpng/pngread.c 1318 0.0%
png_image_read_direct /src/libpng/pngread.c 1317 0.0%
png_image_read_colormapped /src/libpng/pngread.c 1190 0.0%
png_image_read_background /src/libpng/pngread.c 1026 0.0%
png_image_read_and_map /src/libpng/pngread.c 1018 0.0%
OSS_FUZZ_png_read_image /src/libpng/pngread.c 1013 0.0%
png_image_read_composite /src/libpng/pngread.c 1007 0.0%