Fuzz introspector: future_runlength_fuzzer
For issues and ideas: https://github.com/ossf/fuzz-introspector/issues

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
29 29 1 :

['Pl_RunLength::encode(unsigned char const*, unsigned long)']

29 29 Pl_RunLength::write(unsignedcharconst*,unsignedlong) call site: 00000 /src/qpdf/libqpdf/Pl_RunLength.cc:51
20 20 1 :

['Pl_RunLength::flush_encode()']

20 24 Pl_RunLength::finish() call site: 00000 /src/qpdf/libqpdf/Pl_RunLength.cc:166
0 0 None 0 0 Pl_RunLength::Pl_RunLength(charconst*,Pipeline*,Pl_RunLength::action_e) call site: 00000 /src/qpdf/libqpdf/Pl_RunLength.cc:32

Fuzzer calltree

0 LLVMFuzzerTestOneInput [function] [call site] 00000
1 FuzzHelper::FuzzHelper(unsigned char const*, unsigned long) [function] [call site] 00001
1 FuzzHelper::run() [function] [call site] 00002
2 FuzzHelper::doChecks() [function] [call site] 00003
3 Pl_RunLength::setMemoryLimit(unsigned long long) [function] [call site] 00004
3 Pl_Discard::Pl_Discard() [function] [call site] 00005
4 Pipeline::Pipeline(char const*, Pipeline*) [function] [call site] 00006
3 Pl_RunLength::Pl_RunLength(char const*, Pipeline*, Pl_RunLength::action_e) [function] [call site] 00007
4 Pipeline::Pipeline(char const*, Pipeline*) [function] [call site] 00008
4 __cxa_allocate_exception [call site] 00009
4 std::logic_error::logic_error(char const*) [call site] 00010
4 __cxa_throw [call site] 00011
4 __cxa_free_exception [call site] 00012
4 Pipeline::~Pipeline() [function] [call site] 00013
3 Pl_RunLength::write(unsigned char const*, unsigned long) [function] [call site] 00014
4 Pl_RunLength::encode(unsigned char const*, unsigned long) [function] [call site] 00015
5 __cxa_allocate_exception [call site] 00016
5 std::logic_error::logic_error(char const*) [call site] 00017
5 __cxa_throw [call site] 00018
5 std::logic_error::~logic_error() [call site] 00019
5 __cxa_free_exception [call site] 00020
5 QTC::TC(char const*, char const*, int) [function] [call site] 00021
5 Pl_RunLength::flush_encode() [function] [call site] 00022
6 QTC::TC(char const*, char const*, int) [function] [call site] 00023
6 QTC::TC(char const*, char const*, int) [function] [call site] 00024
6 __cxa_allocate_exception [call site] 00025
6 std::logic_error::logic_error(char const*) [call site] 00026
6 __cxa_throw [call site] 00027
6 std::logic_error::~logic_error() [call site] 00028
6 __cxa_free_exception [call site] 00029
6 Pipeline::next() const [function] [call site] 00030
6 Pipeline::next() const [function] [call site] 00031
6 Pipeline::next() const [function] [call site] 00032
6 Pipeline::next() const [function] [call site] 00033
5 Pl_RunLength::flush_encode() [function] [call site] 00034
4 Pl_RunLength::decode(unsigned char const*, unsigned long) [function] [call site] 00035
5 __cxa_allocate_exception [call site] 00036
5 std::runtime_error::runtime_error(char const*) [call site] 00037
5 __cxa_throw [call site] 00038
5 std::runtime_error::~runtime_error() [call site] 00039
5 __cxa_free_exception [call site] 00040
3 Pl_RunLength::finish() [function] [call site] 00041
4 Pl_RunLength::flush_encode() [function] [call site] 00042
4 Pipeline::next() const [function] [call site] 00043
4 __cxa_allocate_exception [call site] 00044
4 std::runtime_error::runtime_error(char const*) [call site] 00045
4 __cxa_throw [call site] 00046
4 std::runtime_error::~runtime_error() [call site] 00047
4 __cxa_free_exception [call site] 00048
4 Pipeline::next() const [function] [call site] 00049
4 Pipeline::writeString(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) [function] [call site] 00050
5 Pipeline::write(char const*, unsigned long) [function] [call site] 00051
4 Pipeline::next() const [function] [call site] 00052
3 Pl_RunLength::~Pl_RunLength() [function] [call site] 00053
4 Pipeline::~Pipeline() [function] [call site] 00054
3 Pl_Discard::~Pl_Discard() [function] [call site] 00055
4 Pipeline::~Pipeline() [function] [call site] 00056
2 __cxa_begin_catch [call site] 00057
2 __cxa_end_catch [call site] 00058
2 __clang_call_terminate [call site] 00059
3 __cxa_begin_catch [call site] 00060