Project: lz4

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 10
Lines of code 5423
Lines covered 4227
Code coverage 77.95%
Code coverage report Report link
Static reachability 56.83%
Fuzz Introspector report Report link (from 2025-03-27)
Fuzzer Code coverage (lines) Latest Report Comments
compress_frame_fuzzer 48.83% (avg: 48.83%, max: 48.83%) 2025-03-27
compress_fuzzer 15.37% (avg: 15.37%, max: 15.37%) 2025-03-27
compress_hc_fuzzer 29.25% (avg: 29.25%, max: 29.25%) 2025-03-27
decompress_frame_fuzzer 24.18% (avg: 24.18%, max: 24.18%) 2025-03-27
decompress_fuzzer 10.13% (avg: 10.13%, max: 10.13%) 2025-03-27
round_trip_frame_fuzzer 54.56% (avg: 54.56%, max: 54.56%) 2025-03-27
round_trip_frame_uncompressed_fuzzer 51.93% (avg: 51.93%, max: 51.93%) 2025-03-27
round_trip_fuzzer 15.89% (avg: 15.89%, max: 15.89%) 2025-03-27
round_trip_hc_fuzzer 26.76% (avg: 26.76%, max: 26.76%) 2025-03-27
round_trip_stream_fuzzer 46.01% (avg: 46.01%, max: 46.01%) 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
LZ4_compressHC_limitedOutput_continue /src/lz4/lib/lz4hc.c 1192 0.0%
LZ4_compressHC_continue /src/lz4/lib/lz4hc.c 1192 0.0%
LZ4_compress_HC_continue_destSize /src/lz4/lib/lz4hc.c 1187 0.0%
LZ4_compressHC2_limitedOutput /src/lz4/lib/lz4hc.c 1179 0.0%
LZ4_compressHC2 /src/lz4/lib/lz4hc.c 1179 0.0%
LZ4_compressHC_limitedOutput /src/lz4/lib/lz4hc.c 1179 0.0%
LZ4_compressHC /src/lz4/lib/lz4hc.c 1179 0.0%
LZ4_compressHC2_limitedOutput_withStateHC /src/lz4/lib/lz4hc.c 1176 0.0%
LZ4_compressHC2_withStateHC /src/lz4/lib/lz4hc.c 1176 0.0%
LZ4_compressHC_limitedOutput_withStateHC /src/lz4/lib/lz4hc.c 1176 0.0%