High level conclusions

Fuzzers reach 65.62% of cyclomatic complexity.

Fuzzers reach 66.82% of all functions.

Fuzzer fuzz_payload_unpack is blocked:

The runtime code coverage of fuzz_payload_unpack covers 5.189% of its statically reachable code. This means there is some place that blocks the fuzzer to continue exploring more code at run time.

Reachability and coverage overview

Functions statically reachable by fuzzers

415 / 621

Cyclomatic complexity statically reachable by fuzzers

1178 / 1795

Runtime code coverage of functions

117 / 621

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	Runtime reached by Fuzzers	Combined 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: fuzz_fru_area

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

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	2	2.56%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	76	97.4%
All colors	78	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
1	9	ipmi::fru::appendChassisType(std::__1::map , std::__1::allocator >, std::__1::basic_string , std::__1::allocator >, std::__1::less , std::__1::allocator > >, std::__1::allocator , std::__1::allocator > const, std::__1::basic_string , std::__1::allocator > > > > const&, std::__1::vector >&)	call site: 00009
1	44	ipmi::fru::appendChassisType(std::__1::map , std::__1::allocator >, std::__1::basic_string , std::__1::allocator >, std::__1::less , std::__1::allocator > >, std::__1::allocator , std::__1::allocator > const, std::__1::basic_string , std::__1::allocator > > > > const&, std::__1::vector >&)	call site: 00044	__cxa_begin_catch

Runtime coverage analysis

Covered functions

43

Functions that are reachable but not covered

10

Reachable functions

68

Percentage of reachable functions covered

85.29%

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/phosphor-host-ipmid/build/../test/fuzz_fru_area.cpp	2
/src/phosphor-host-ipmid/build/../ipmi_fru_info_area.cpp	13
/src/phosphor-host-ipmid/build/../subprojects/phosphor-logging/lib/include/phosphor-logging/lg2.hpp	3
/src/phosphor-host-ipmid/build/../subprojects/phosphor-logging/lib/include/phosphor-logging/lg2/conversion.hpp	7
/src/phosphor-host-ipmid/build/../subprojects/phosphor-logging/lib/include/phosphor-logging/lg2/header.hpp	1
/src/phosphor-host-ipmid/build/../subprojects/phosphor-logging/lib/include/phosphor-logging/lg2/flags.hpp	11

Fuzzer: fuzz_sensor_utils

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

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	12	14.6%
gold	[1:9]	21	25.6%
yellow	[10:29]	30	36.5%
greenyellow	[30:49]	4	4.87%
lawngreen	50+	15	18.2%
All colors	82	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
6	61	LLVMFuzzerTestOneInput	call site: 00061	__cxa_allocate_exception
1	2	ipmi::getSensorAttributes(double, double, short&, signed char&, short&, signed char&, bool&)	call site: 00002
1	14	ipmi::getSensorAttributes(double, double, short&, signed char&, short&, signed char&, bool&)	call site: 00014
1	50	ipmi::getSensorAttributes(double, double, short&, signed char&, short&, signed char&, bool&)	call site: 00050
1	68	LLVMFuzzerTestOneInput	call site: 00068	__cxa_end_catch
1	77	ipmi::getScaledIPMIValue(double, double, double)	call site: 00077	__cxa_begin_catch
1	80	LLVMFuzzerTestOneInput	call site: 00080	__cxa_end_catch

Runtime coverage analysis

Covered functions

65

Functions that are reachable but not covered

18

Reachable functions

96

Percentage of reachable functions covered

81.25%

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/phosphor-host-ipmid/build/../test/fuzz_sensor_utils.cpp	1
/src/phosphor-host-ipmid/build/../dbus-sdr/sensorutils.cpp	6
/src/phosphor-host-ipmid/build/../subprojects/phosphor-logging/lib/include/phosphor-logging/lg2.hpp	9
/src/phosphor-host-ipmid/build/../subprojects/phosphor-logging/lib/include/phosphor-logging/lg2/conversion.hpp	14
/src/phosphor-host-ipmid/build/../test/lg2_stub.cpp	1
/src/phosphor-host-ipmid/build/../subprojects/phosphor-logging/lib/include/phosphor-logging/lg2/header.hpp	1
/src/phosphor-host-ipmid/build/../subprojects/phosphor-logging/lib/include/phosphor-logging/lg2/flags.hpp	20
/usr/local/bin/../include/c++/v1/stdexcept	1

Fuzzer: fuzz_payload_unpack

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

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	503	97.4%
gold	[1:9]	0	0.0%
yellow	[10:29]	1	0.19%
greenyellow	[30:49]	4	0.77%
lawngreen	50+	8	1.55%
All colors	516	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
325	108	LLVMFuzzerTestOneInput	call site: 00108	__cxa_allocate_exception
78	437	void lg2::details::log_conversion::done<>(lg2::level, std::__1::source_location const&, char const*)	call site: 00437	_ZN4ipmi12SecureBufferCI2NSt3__16vectorIhNS_15SecureAllocatorIhEEEEIPKhTnNS1_9enable_ifIXaasr31__has_forward_iterator_categoryIT_EE5valuesr16is_constructibleIhNS1_15iterator_traitsIS8_E9referenceEEE5valueEiE4typeELi0EEES8_S8_
69	7	LLVMFuzzerTestOneInput	call site: 00007	__clang_call_terminate
20	77	lg2::log<(lg2::level)3, char const (&) [9], unsigned long>::log(char const*, lg2::details::header_str const&, unsigned long&&, std::__1::source_location const&)	call site: 00077	_ZN3lg27detailsL11log_convertITpTkNS0_9log_flagsEJETkNS0_29unsigned_integral_except_boolEmEEDaPKcNS0_8log_flagIJDpT_EEET0_
5	99	LLVMFuzzerTestOneInput	call site: 00099
4	2	LLVMFuzzerTestOneInput	call site: 00002
2	105	LLVMFuzzerTestOneInput	call site: 00105

Runtime coverage analysis

Covered functions

95

Functions that are reachable but not covered

676

Reachable functions

713

Percentage of reachable functions covered

5.19%

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/phosphor-host-ipmid/build/../test/fuzz_payload_unpack.cpp	1
/src/phosphor-host-ipmid/build/../include/ipmid/types.hpp	5
/src/phosphor-host-ipmid/build/../include/ipmid/message.hpp	64
/usr/include/boost/multiprecision/number.hpp	64
/usr/include/boost/multiprecision/cpp_int.hpp	81
/src/phosphor-host-ipmid/build/../include/ipmid/message/unpack.hpp	37
/usr/include/boost/multiprecision/detail/number_base.hpp	5
/usr/include/boost/multiprecision/cpp_int/bitwise.hpp	6
/usr/include/boost/multiprecision/cpp_int/checked.hpp	1
/usr/include/boost/multiprecision/cpp_int/misc.hpp	6
/src/phosphor-host-ipmid/build/../subprojects/phosphor-logging/lib/include/phosphor-logging/lg2.hpp	6
/src/phosphor-host-ipmid/build/../subprojects/phosphor-logging/lib/include/phosphor-logging/lg2/conversion.hpp	6
/src/phosphor-host-ipmid/build/../subprojects/phosphor-logging/lib/include/phosphor-logging/lg2/header.hpp	1
/src/phosphor-host-ipmid/build/../subprojects/phosphor-logging/lib/include/phosphor-logging/lg2/flags.hpp	11
/usr/include/boost/multiprecision/detail/no_et_ops.hpp	4
/usr/include/boost/multiprecision/detail/default_ops.hpp	5
/usr/local/bin/../include/c++/v1/stdexcept	2
/usr/include/boost/assert/source_location.hpp	5
/usr/include/boost/throw_exception.hpp	5
/usr/include/boost/exception/exception.hpp	12
/usr/include/boost/exception/info.hpp	7
/src/phosphor-host-ipmid/build/../include/ipmid/message/pack.hpp	22
/src/phosphor-host-ipmid/build/../test/lg2_stub.cpp	1

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
boost::exception_ptrboost::exception_detail::get_static_exception_object ()	/usr/include/boost/exception/detail/exception_ptr.hpp	1	['N/A']	6	0	138	28	20	122	0	208	171
boost::exception_ptrboost::exception_detail::get_static_exception_object ()	/usr/include/boost/exception/detail/exception_ptr.hpp	1	['N/A']	6	0	138	28	20	120	0	206	90

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

Functions statically reachable by fuzzers

486 / 621

Cyclomatic complexity statically reachable by fuzzers

1435 / 1795

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	Runtime reached by Fuzzers	Combined 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

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.

/src/phosphor-host-ipmid/build/../test/fuzz_fru_area.cpp

Dictionary

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

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['ipmi::fru::appendChassisType(std::__1::map, std::__1::allocator >, std::__1::basic_string, std::__1::allocator >, std::__1::less, std::__1::allocator > >, std::__1::allocator, std::__1::allocator > const, std::__1::basic_string, std::__1::allocator > > > > const&, std::__1::vector >&)', 'ipmi::fru::appendChassisType(std::__1::map, std::__1::allocator >, std::__1::basic_string, std::__1::allocator >, std::__1::less, std::__1::allocator > >, std::__1::allocator, std::__1::allocator > const, std::__1::basic_string, std::__1::allocator > > > > const&, std::__1::vector >&)']

/src/phosphor-host-ipmid/build/../test/fuzz_sensor_utils.cpp

Dictionary

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

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['LLVMFuzzerTestOneInput', 'ipmi::getSensorAttributes(double, double, short&, signed char&, short&, signed char&, bool&)', 'ipmi::getSensorAttributes(double, double, short&, signed char&, short&, signed char&, bool&)', 'ipmi::getSensorAttributes(double, double, short&, signed char&, short&, signed char&, bool&)', 'ipmi::getScaledIPMIValue(double, double, double)']

/src/phosphor-host-ipmid/build/../test/fuzz_payload_unpack.cpp

Dictionary

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

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['LLVMFuzzerTestOneInput', 'void lg2::details::log_conversion::done<>(lg2::level, std::__1::source_location const&, char const*)', 'lg2::log<(lg2::level)3, char const (&) [9], unsigned long>::log(char const*, lg2::details::header_str const&, unsigned long&&, std::__1::source_location const&)']

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

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/phosphor-host-ipmid/build/../test/fuzz_fru_area.cpp	['fuzz_fru_area']	[]
/usr/include/boost/multiprecision/detail/no_et_ops.hpp	['fuzz_payload_unpack']	[]
/usr/include/boost/smart_ptr/detail/sp_counted_base_gcc_atomic.hpp	[]	[]
/usr/include/boost/asio/error.hpp	[]	[]
/src/phosphor-host-ipmid/build/../include/ipmid/message/pack.hpp	['fuzz_payload_unpack']	[]
/usr/include/boost/system/detail/error_category.hpp	[]	[]
/src/phosphor-host-ipmid/build/../subprojects/phosphor-logging/lib/include/phosphor-logging/lg2/conversion.hpp	['fuzz_fru_area', 'fuzz_sensor_utils', 'fuzz_payload_unpack']	[]
/usr/include/boost/asio/execution_context.hpp	[]	[]
/usr/include/boost/asio/detail/null_tss_ptr.hpp	[]	[]
/usr/include/boost/system/detail/system_category.hpp	[]	[]
/src/phosphor-host-ipmid/build/../test/lg2_stub.cpp	['fuzz_sensor_utils', 'fuzz_payload_unpack']	[]
/usr/include/boost/system/detail/interop_category.hpp	[]	[]
/usr/include/boost/system/detail/generic_category_message.hpp	[]	[]
/usr/local/bin/../include/c++/v1/stdexcept	['fuzz_sensor_utils', 'fuzz_payload_unpack']	[]
/usr/include/boost/assert/source_location.hpp	['fuzz_payload_unpack']	['fuzz_payload_unpack']
/usr/include/boost/system/detail/error_category_impl.hpp	[]	[]
/src/phosphor-host-ipmid/build/../include/ipmid/types.hpp	['fuzz_payload_unpack']	[]
/usr/include/boost/multiprecision/cpp_int/bitwise.hpp	['fuzz_payload_unpack']	[]
/usr/include/boost/system/detail/generic_category.hpp	[]	[]
/src/phosphor-host-ipmid/build/../subprojects/phosphor-logging/lib/include/phosphor-logging/lg2/header.hpp	['fuzz_fru_area', 'fuzz_sensor_utils', 'fuzz_payload_unpack']	[]
/usr/include/boost/system/detail/error_code.hpp	[]	[]
/src/phosphor-host-ipmid/build/../ipmi_fru_info_area.cpp	['fuzz_fru_area']	[]
/usr/include/boost/exception/detail/exception_ptr.hpp	[]	[]
/usr/include/boost/asio/detail/noncopyable.hpp	[]	[]
/src/phosphor-host-ipmid/build/../subprojects/phosphor-logging/lib/include/phosphor-logging/lg2/flags.hpp	['fuzz_fru_area', 'fuzz_sensor_utils', 'fuzz_payload_unpack']	[]
/usr/include/boost/smart_ptr/detail/shared_count.hpp	[]	[]
/usr/include/boost/exception/exception.hpp	['fuzz_payload_unpack']	['fuzz_payload_unpack']
/usr/include/boost/asio/impl/error.ipp	[]	[]
/usr/include/boost/system/detail/error_condition.hpp	[]	[]
/usr/include/boost/multiprecision/detail/number_base.hpp	['fuzz_payload_unpack']	[]
/usr/local/bin/../include/c++/v1/__new/exceptions.h	[]	[]
/usr/include/boost/exception/info.hpp	['fuzz_payload_unpack']	[]
/usr/include/boost/asio/detail/tss_ptr.hpp	[]	[]
/usr/include/boost/multiprecision/cpp_int.hpp	['fuzz_payload_unpack']	[]
/src/phosphor-host-ipmid/build/../test/fuzz_payload_unpack.cpp	['fuzz_payload_unpack']	[]
/usr/local/bin/../include/c++/v1/__exception/exception.h	[]	[]
/usr/local/bin/../include/c++/v1/optional	[]	[]
/usr/local/bin/../include/c++/v1/string	[]	[]
/src/phosphor-host-ipmid/build/../include/ipmid/message/unpack.hpp	['fuzz_payload_unpack']	[]
/usr/include/boost/system/detail/system_category_impl.hpp	[]	[]
/usr/include/boost/smart_ptr/detail/sp_counted_impl.hpp	[]	[]
/src/phosphor-host-ipmid/build/../test/fuzz_sensor_utils.cpp	['fuzz_sensor_utils']	[]
/usr/include/boost/system/detail/system_category_message.hpp	[]	[]
/usr/include/boost/multiprecision/cpp_int/checked.hpp	['fuzz_payload_unpack']	[]
/usr/include/boost/system/detail/snprintf.hpp	[]	[]
/usr/include/boost/multiprecision/cpp_int/misc.hpp	['fuzz_payload_unpack']	[]
/src/phosphor-host-ipmid/build/../dbus-sdr/sensorutils.cpp	['fuzz_sensor_utils']	[]
/src/phosphor-host-ipmid/build/../subprojects/phosphor-logging/lib/include/phosphor-logging/lg2.hpp	['fuzz_fru_area', 'fuzz_sensor_utils', 'fuzz_payload_unpack']	[]
/src/phosphor-host-ipmid/build/../include/ipmid/message.hpp	['fuzz_payload_unpack']	[]
/usr/include/boost/multiprecision/number.hpp	['fuzz_payload_unpack']	[]
/usr/include/boost/core/checked_delete.hpp	[]	[]
/usr/include/boost/multiprecision/detail/default_ops.hpp	['fuzz_payload_unpack']	[]
/usr/include/boost/throw_exception.hpp	['fuzz_payload_unpack']	['fuzz_payload_unpack']
/usr/include/boost/smart_ptr/shared_ptr.hpp	[]	[]

Directories in report

Directory
/usr/include/boost/multiprecision/
/usr/include/boost/exception/detail/
/usr/include/boost/exception/
/src/phosphor-host-ipmid/build/../subprojects/phosphor-logging/lib/include/phosphor-logging/lg2/
/usr/include/boost/smart_ptr/detail/
/usr/include/boost/multiprecision/detail/
/usr/local/bin/../include/c++/v1/__exception/
/src/phosphor-host-ipmid/build/../subprojects/phosphor-logging/lib/include/phosphor-logging/
/usr/local/bin/../include/c++/v1/__new/
/src/phosphor-host-ipmid/build/../
/src/phosphor-host-ipmid/build/../test/
/usr/include/boost/smart_ptr/
/src/phosphor-host-ipmid/build/../dbus-sdr/
/usr/include/boost/
/usr/include/boost/asio/detail/
/usr/include/boost/system/detail/
/usr/include/boost/asio/
/src/phosphor-host-ipmid/build/../include/ipmid/message/
/src/phosphor-host-ipmid/build/../include/ipmid/
/usr/include/boost/core/
/usr/include/boost/asio/impl/
/usr/include/boost/assert/
/usr/include/boost/multiprecision/cpp_int/
/usr/local/bin/../include/c++/v1/