Fuzz introspector
For issues and ideas: https://github.com/ossf/fuzz-introspector/issues
Project coverage
Per-fuzzer coverage

Table of contents

Project overview: unrar
High level conclusions
Reachability and coverage overview
Fuzzers overview
Project functions overview
Fuzzer details
Fuzzer: unrar_fuzzer
Call tree
Fuzz blockers
Runtime coverage analysis
Files reached
Analyses and suggestions
Optimal target analysis
Remaining optimal interesting functions
All functions overview
Runtime coverage analysis
Complex functions with low coverage
Files and Directories in report
Files in report
Directories in report
Metadata section
Function call coverage
Function in each files in report
Report generation date: 2023-06-07

Project overview: unrar

High level conclusions

Reachability and coverage overview

Functions statically reachable by fuzzers
82.0%
622 / 762
Cyclomatic complexity statically reachable by fuzzers
86.0%
4478 / 5206
Runtime code coverage of functions
32.0%
243 / 762

Fuzzers overview

Fuzzer Fuzzer filename Functions Reached Functions unreached Fuzzer depth Files reached Basic blocks reached Cyclomatic complexity Details
unrar_fuzzer /src/unrar/unrar_fuzzer.cc 1337 172 10 52 10119 4688 unrar_fuzzer.cc

Project functions 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.

For further technical details on the meaning of columns in the below table, please see the Glossary .

Func name Functions filename Args Function call depth Reached by Fuzzers Fuzzers runtime hit Func lines hit % I Count BB Count Cyclomatic complexity Functions reached Reached by functions Accumulated cyclomatic complexity Undiscovered complexity

Fuzzer details

Fuzzer: unrar_fuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Full calltree

Call tree overview bitmap:

The distribution of callsites in terms of coloring is
Color Runtime hitcount Callsite count Percentage
red 0 348 62.7%
gold [1:9] 184 33.1%
yellow [10:29] 11 1.98%
greenyellow [30:49] 1 0.18%
lawngreen 50+ 11 1.98%
All colors 555 100

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
3171 3171 4 :

['Unpack::SetDestSize(long)', 'Unpack::Init(unsigned long, bool)', 'Unpack::DoUnpack(unsigned int, bool)', 'CmdExtract::UnstoreFile(ComprDataIO&, long)']

3396 6131 CmdExtract::ExtractCurrentFile(Archive&,unsignedlong,bool&) call site: 00000 /src/unrar/extract.cpp:663
1837 1841 3 :

['CmdExtract::DetectStartVolume(wchar_t const*, bool)', 'wcsncpyz(wchar_t*, wchar_t const*, unsigned long)', 'NextVolumeName(wchar_t*, unsigned int, bool)']

1849 9998 CmdExtract::ExtractArchive() call site: 00000 /src/unrar/extract.cpp:173
679 863 10 :

['ReadTextFile(wchar_t const*, StringList*, bool, bool, RAR_CHARSET, bool, bool, bool)', 'FindData::FindData()', 'wcschr', 'IsDriveDiv(int)', 'StringList::AddString(wchar_t const*)', 'AddEndSlash(wchar_t*, unsigned long)', 'wcslen', 'IsPathDiv(int)', 'FindFile::FastFind(wchar_t const*, FindData*, bool)', 'IsWildcard(wchar_t const*)']

679 879 CommandData::ParseArg(wchar_t*) call site: 00000 /src/unrar/cmddata.cpp:100
589 589 1 :

['ExtractSymlink(CommandData*, ComprDataIO&, Archive&, wchar_t const*)']

814 3549 CmdExtract::ExtractCurrentFile(Archive&,unsignedlong,bool&) call site: 00000 /src/unrar/extract.cpp:681
429 431 3 :

['CmdExtract::ExtrCreateDir(Archive&, wchar_t const*)', 'Archive::IsArcDir()', 'CmdExtract::ExtrCreateFile(Archive&, File&)']

4788 7811 CmdExtract::ExtractCurrentFile(Archive&,unsignedlong,bool&) call site: 00000 /src/unrar/extract.cpp:545
353 463 4 :

['CmdExtract::ExtrPrepareName(Archive&, wchar_t const*, wchar_t*, unsigned long)', 'CmdExtract::ExtractFileCopy(File&, wchar_t*, wchar_t*, wchar_t*, unsigned long)', 'ExtractHardlink(CommandData*, wchar_t*, wchar_t*, unsigned long)', 'ConvertPath(wchar_t const*, wchar_t*, unsigned long)']

578 3423 CmdExtract::ExtractCurrentFile(Archive&,unsignedlong,bool&) call site: 00000 /src/unrar/extract.cpp:667
281 321 8 :

['CryptData::SetKey50(bool, SecPassword*, wchar_t const*, unsigned char const*, unsigned char const*, unsigned int, unsigned char*, unsigned char*)', 'cleandata(void*, unsigned long)', 'CryptData::SetKey15(char const*)', 'CryptData::SetKey30(bool, SecPassword*, wchar_t const*, unsigned char const*)', 'SecPassword::Get(wchar_t*, unsigned long)', 'WideToChar(wchar_t const*, char*, unsigned long)', 'CryptData::SetKey13(char const*)', 'CryptData::SetKey20(char const*)']

281 321 CryptData::SetCryptKeys(bool,CRYPT_METHOD,SecPassword*,unsignedcharconst*,unsignedcharconst*,unsignedint,unsignedchar*,unsignedchar*) call site: 00000 /src/unrar/crypt.cpp:59
204 204 2 :

['SetExtraInfo20(CommandData*, Archive&, wchar_t*)', 'SetExtraInfo(CommandData*, Archive&, wchar_t*)']

204 1420 CmdExtract::ExtractCurrentFile(Archive&,unsignedlong,bool&) call site: 00000 /src/unrar/extract.cpp:275
116 377 8 :

['ErrorHandler::Exit(RAR_EXIT)', 'Archive::RequestArcPassword()', 'RawRead::SetCrypt(CryptData*)', 'void uiMsg (UIMESSAGE_CODE, wchar_t*)', 'CryptData::SetCryptKeys(bool, CRYPT_METHOD, SecPassword*, unsigned char const*, unsigned char const*, unsigned int, unsigned char*, unsigned char*)', 'SecPassword::IsSet()', 'SecPassword::Clean()', 'uiIsGlobalPasswordSet()']

1436 3070 Archive::ReadHeader50() call site: 00000 /src/unrar/arcread.cpp:555
84 92 4 :

['SetExt(wchar_t*, wchar_t const*, unsigned long)', 'wcsncpyz(wchar_t*, wchar_t const*, unsigned long)', 'RemoveNameFromPath(wchar_t*)', 'AddEndSlash(wchar_t*, unsigned long)']

92 165 CmdExtract::ExtrPrepareName(Archive&,wchar_tconst*,wchar_t*,unsignedlong) call site: 00000 /src/unrar/extract.cpp:921
66 66 1 :

['File::Delete()']

70 70 File::~File() call site: 00000 /src/unrar/file.cpp:29
63 63 1 :

['CmdExtract::ExtrDllGetPassword()']

4986 8353 CmdExtract::ExtractCurrentFile(Archive&,unsignedlong,bool&) call site: 00000 /src/unrar/extract.cpp:469

Runtime coverage analysis

Covered functions
244
Functions that are reachable but not covered
870
Reachable functions
1337
Percentage of reachable functions covered
34.93%
NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.
Function name source code lines source lines hit percentage hit

Files reached

filename functions hit
/src/unrar/unrar_fuzzer.cc 1
/src/unrar/cmddata.cpp 10
/src/unrar/options.cpp 3
/src/unrar/secpassword.cpp 7
/src/unrar/./array.hpp 23
/src/unrar/./timefn.hpp 2
/src/unrar/./threadmisc.cpp 6
/src/unrar/strlist.cpp 6
/src/unrar/./strlist.hpp 2
/src/unrar/unicode.cpp 12
/src/unrar/strfn.cpp 5
/src/unrar/./consio.hpp 2
/src/unrar/errhnd.cpp 13
/src/unrar/./uisilent.cpp 3
/src/unrar/./ui.hpp 10
/src/unrar/./secpassword.hpp 1
/src/unrar/consio.cpp 3
/src/unrar/pathfn.cpp 9
/src/unrar/filestr.cpp 2
/src/unrar/filefn.cpp 5
/src/unrar/find.cpp 5
/src/unrar/./find.hpp 1
/src/unrar/match.cpp 5
/src/unrar/timefn.cpp 4
/src/unrar/system.cpp 3
/src/unrar/file.cpp 11
/src/unrar/./file.hpp 2
/src/unrar/./cmdfilter.cpp 2
/src/unrar/./cmdmix.cpp 1
/src/unrar/extract.cpp 3
/src/unrar/rdwrfn.cpp 3
/src/unrar/hash.cpp 2
/src/unrar/crypt.cpp 2
/src/unrar/./crypt.hpp 2
/src/unrar/rijndael.cpp 3
/src/unrar/threadpool.cpp 3
/src/unrar/unpack.cpp 4
/src/unrar/getbits.cpp 2
/src/unrar/./unpack50frag.cpp 3
/src/unrar/./model.cpp 1
/src/unrar/./suballoc.cpp 3
/src/unrar/rarvm.cpp 2
/src/unrar/./unpack50.cpp 2
/src/unrar/./getbits.hpp 1
/src/unrar/./unpack20.cpp 1
/src/unrar/./unpack30.cpp 2
/src/unrar/./unpack15.cpp 3
/src/unrar/./model.hpp 1
/src/unrar/./suballoc.hpp 1
/src/unrar/./rdwrfn.hpp 1
/src/unrar/./errhnd.hpp 2
/src/unrar/./unpack.hpp 1

Analyses and suggestions

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.

Func name Functions filename Arg count Args Function depth hitcount instr count bb count cyclomatic complexity Reachable functions Incoming references total cyclomatic complexity Unreached complexity
CommandData::ProcessCommand() /src/unrar/cmddata.cpp 1 ['class.CommandData *'] 9 0 363 70 12 1317 0 4452 215
CalcFileSum(File*,unsignedint*,unsignedchar*,unsignedint,long,unsignedint) /src/unrar/filefn.cpp 6 ['class.File *', 'int *', 'char *', 'int ', 'size_t ', 'int '] 6 0 347 62 60 169 0 370 60
CommandData::ParseEnvVar() /src/unrar/cmddata.cpp 1 ['class.CommandData *'] 6 0 72 13 10 300 0 861 36

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

Functions statically reachable by fuzzers
85.0%
650 / 762
Cyclomatic complexity statically reachable by fuzzers
92.0%
4783 / 5206

All functions overview

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

Func name Functions filename Args Function call depth Reached by Fuzzers Fuzzers runtime hit Func lines hit % I Count BB Count Cyclomatic complexity Functions reached Reached by functions Accumulated cyclomatic complexity Undiscovered complexity

Runtime coverage analysis

This section shows analysis of runtime coverage data.

For futher technical details on how this section is generated, please see the Glossary .

Complex functions with low coverage

Func name Function total lines Lines covered at runtime percentage covered Reached by fuzzers
Archive::IsArchive(bool) 113 55 48.67% ['unrar_fuzzer']
Archive::ReadHeader50() 260 112 43.07% ['unrar_fuzzer']
Archive::ProcessExtra50(RawRead*,unsignedlong,BaseBlock*) 199 40 20.10% ['unrar_fuzzer']
Archive::ConvertAttributes() 38 18 47.36% ['unrar_fuzzer']
Array ::Add(unsignedlong) 34 18 52.94% ['unrar_fuzzer']
Array ::Add(unsignedlong) 34 18 52.94% ['unrar_fuzzer']
Array ::Add(unsignedlong) 34 18 52.94% ['unrar_fuzzer']
CommandData::ParseArg(wchar_t*) 57 15 26.31% ['unrar_fuzzer']
CommandData::ProcessSwitch(wchar_tconst*) 620 12 1.935% ['unrar_fuzzer']
CommandData::CheckArgs(StringList*,bool,wchar_tconst*,bool,int) 51 9 17.64% ['unrar_fuzzer']
CommandData::TimeCheck(RarTime&,RarTime&,RarTime&) 58 10 17.24% ['unrar_fuzzer']
CryptData::SetCryptKeys(bool,CRYPT_METHOD,SecPassword*,unsignedcharconst*,unsignedcharconst*,unsignedint,unsignedchar*,unsignedchar*) 32 3 9.375% ['unrar_fuzzer']
CmdExtract::ExtractArchive() 85 39 45.88% ['unrar_fuzzer']
CmdExtract::ExtractCurrentFile(Archive&,unsignedlong,bool&) 383 152 39.68% ['unrar_fuzzer']
CmdExtract::ExtrPrepareName(Archive&,wchar_tconst*,wchar_t*,unsignedlong) 74 20 27.02% ['unrar_fuzzer']
File::Read(void*,unsignedlong) 57 17 29.82% ['unrar_fuzzer']
File::RawSeek(long,int) 38 10 26.31% ['unrar_fuzzer']
match(wchar_tconst*,wchar_tconst*,bool) 46 13 28.26% ['unrar_fuzzer']
QuickOpen::Read(void*,unsignedlong,unsignedlong&) 37 3 8.108% ['unrar_fuzzer']
RawRead::Read(unsignedlong) 32 14 43.75% ['unrar_fuzzer']
UtfToWide(charconst*,wchar_t*,unsignedlong) 72 17 23.61% ['unrar_fuzzer']
WideToCharMap(wchar_tconst*,char*,unsignedlong,bool&) 33 4 12.12% ['unrar_fuzzer']

Files and Directories in report

This section shows which files and directories are considered in this report. The main reason for showing this is fuzz introspector may include more code in the reasoning than is desired. This section helps identify if too many files/directories are included, e.g. third party code, which may be irrelevant for the threat model. In the event too much is included, fuzz introspector supports a configuration file that can exclude data from the report. See the following link for more information on how to create a config file: link

Files in report

Source file Reached by Covered by
[] []
/src/unrar/./ulinks.cpp [] []
/src/unrar/./unpack50mt.cpp [] []
/src/unrar/archive.cpp [] []
/src/unrar/options.cpp ['unrar_fuzzer'] ['unrar_fuzzer']
/src/unrar/./ui.hpp ['unrar_fuzzer'] []
/src/unrar/getbits.cpp ['unrar_fuzzer'] ['unrar_fuzzer']
/src/unrar/filcreat.cpp [] []
/src/unrar/./archive.hpp [] []
/src/unrar/./uicommon.cpp [] []
/src/unrar/./errhnd.hpp ['unrar_fuzzer'] []
/src/unrar/./unpack15.cpp ['unrar_fuzzer'] []
/src/unrar/./consio.hpp ['unrar_fuzzer'] []
/src/unrar/./arccmt.cpp [] []
/src/unrar/cmddata.cpp ['unrar_fuzzer'] ['unrar_fuzzer']
/src/unrar/./array.hpp ['unrar_fuzzer'] []
/src/unrar/./unpack.hpp ['unrar_fuzzer'] []
/src/unrar/extract.cpp ['unrar_fuzzer'] ['unrar_fuzzer']
/src/unrar/./pathfn.hpp [] []
/src/unrar/./win32stm.cpp [] []
/src/unrar/./secpassword.hpp ['unrar_fuzzer'] []
/src/unrar/./file.hpp ['unrar_fuzzer'] []
/src/unrar/./cmdmix.cpp ['unrar_fuzzer'] []
/src/unrar/sha1.cpp [] []
/src/unrar/./crypt3.cpp [] []
/src/unrar/filefn.cpp ['unrar_fuzzer'] ['unrar_fuzzer']
/src/unrar/timefn.cpp ['unrar_fuzzer'] ['unrar_fuzzer']
/src/unrar/./headers.hpp [] []
/src/unrar/./crypt.hpp ['unrar_fuzzer'] []
/src/unrar/./cmdfilter.cpp ['unrar_fuzzer'] []
/src/unrar/./unpack30.cpp ['unrar_fuzzer'] []
/src/unrar/./model.cpp ['unrar_fuzzer'] []
/src/unrar/./unpack50.cpp ['unrar_fuzzer'] []
/src/unrar/blake2s.cpp [] []
/src/unrar/crc.cpp [] []
/src/unrar/errhnd.cpp ['unrar_fuzzer'] ['unrar_fuzzer']
/src/unrar/strfn.cpp ['unrar_fuzzer'] ['unrar_fuzzer']
/src/unrar/./hardlinks.cpp [] []
/src/unrar/./timefn.hpp ['unrar_fuzzer'] []
/src/unrar/global.cpp [] []
/src/unrar/qopen.cpp [] []
/src/unrar/./rawread.hpp [] []
/src/unrar/filestr.cpp ['unrar_fuzzer'] []
/src/unrar/./unpack20.cpp ['unrar_fuzzer'] []
/src/unrar/rdwrfn.cpp ['unrar_fuzzer'] ['unrar_fuzzer']
/src/unrar/consio.cpp ['unrar_fuzzer'] []
/src/unrar/./coder.cpp [] []
/src/unrar/extinfo.cpp [] []
/src/unrar/unpack.cpp ['unrar_fuzzer'] ['unrar_fuzzer']
/src/unrar/./crypt5.cpp [] []
/src/unrar/./uowners.cpp [] []
/src/unrar/./unpack50frag.cpp ['unrar_fuzzer'] []
/src/unrar/./suballoc.cpp ['unrar_fuzzer'] []
/src/unrar/./uisilent.cpp ['unrar_fuzzer'] []
/src/unrar/arcread.cpp [] []
/src/unrar/./blake2s.hpp [] []
/src/unrar/strlist.cpp ['unrar_fuzzer'] ['unrar_fuzzer']
/src/unrar/./getbits.hpp ['unrar_fuzzer'] []
/src/unrar/./crypt1.cpp [] []
/src/unrar/./suballoc.hpp ['unrar_fuzzer'] []
/src/unrar/rijndael.cpp ['unrar_fuzzer'] ['unrar_fuzzer']
/src/unrar/./model.hpp ['unrar_fuzzer'] []
/src/unrar/./rarvm.hpp [] []
/src/unrar/rawread.cpp [] []
/src/unrar/rarvm.cpp ['unrar_fuzzer'] ['unrar_fuzzer']
/src/unrar/./find.hpp ['unrar_fuzzer'] []
/src/unrar/./cmddata.hpp [] []
/src/unrar/./log.cpp [] []
/src/unrar/./unpackinline.cpp [] []
/src/unrar/./rdwrfn.hpp ['unrar_fuzzer'] []
/src/unrar/secpassword.cpp ['unrar_fuzzer'] ['unrar_fuzzer']
/src/unrar/./rawint.hpp [] []
/src/unrar/crypt.cpp ['unrar_fuzzer'] ['unrar_fuzzer']
/src/unrar/match.cpp ['unrar_fuzzer'] ['unrar_fuzzer']
/src/unrar/./crypt2.cpp [] []
/src/unrar/./threadmisc.cpp ['unrar_fuzzer'] []
/src/unrar/file.cpp ['unrar_fuzzer'] ['unrar_fuzzer']
/src/unrar/./strlist.hpp ['unrar_fuzzer'] []
/src/unrar/encname.cpp [] []
/usr/local/bin/../include/c++/v1/stdexcept [] []
/src/unrar/hash.cpp ['unrar_fuzzer'] ['unrar_fuzzer']
/src/unrar/unicode.cpp ['unrar_fuzzer'] ['unrar_fuzzer']
/src/unrar/find.cpp ['unrar_fuzzer'] ['unrar_fuzzer']
/src/unrar/smallfn.cpp [] []
/src/unrar/pathfn.cpp ['unrar_fuzzer'] ['unrar_fuzzer']
/src/unrar/scantree.cpp [] []
/src/unrar/system.cpp ['unrar_fuzzer'] []
/src/unrar/./blake2sp.cpp [] []
/src/unrar/./qopen.hpp [] []
/src/unrar/sha256.cpp [] []
/src/unrar/unrar_fuzzer.cc ['unrar_fuzzer'] ['unrar_fuzzer']
/src/unrar/headers.cpp [] []
/src/unrar/threadpool.cpp ['unrar_fuzzer'] ['unrar_fuzzer']

Directories in report

Directory
/src/unrar/./
/src/unrar/
/usr/local/bin/../include/c++/v1/

Metadata section

This sections shows the raw data that is used to produce this report. This is mainly used for further processing and developer debugging.

Fuzzer Calltree file Program data file Coverage file
unrar_fuzzer fuzzerLogFile-0-BxzkOVGHUD.data fuzzerLogFile-0-BxzkOVGHUD.data.yaml unrar_fuzzer.covreport