High level conclusions

Fuzzers reach 90.78% of cyclomatic complexity.

Fuzzers reach 86.35% of all functions.

Fuzzer augeas_api_fuzzer is blocked:

The runtime code coverage of augeas_api_fuzzer covers 26.91% of its statically reachable code. This means there is some place that blocks the fuzzer to continue exploring more code at run time.

Fuzzer augeas_fa_fuzzer is blocked:

The runtime code coverage of augeas_fa_fuzzer covers 4.819% of its statically reachable code. This means there is some place that blocks the fuzzer to continue exploring more code at run time.

Fuzzer augeas_escape_name_fuzzer is blocked:

The runtime code coverage of augeas_escape_name_fuzzer covers 14.53% 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

987 / 1143

Cyclomatic complexity statically reachable by fuzzers

8243 / 9080

Runtime code coverage of functions

296 / 1143

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: augeas_escape_name_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

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	4275	88.1%
gold	[1:9]	0	0.0%
yellow	[10:29]	12	0.24%
greenyellow	[30:49]	10	0.20%
lawngreen	50+	550	11.3%
All colors	4847	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
5440	5440	2 : View List ['ns_remove', 'eval_pred']	5440	5440	ns_filter	call site: 00392	/src/augeas/src/pathx.c:1268
1009	1019	3 : View List ['regexp_check', 'make_base_type', 'syntax_error']	1009	1019	check_value	call site: 01792	/src/augeas/src/syntax.c:1150
309	309	1 : View List ['parse_function_call']	309	309	parse_primary_expr	call site: 00137	/src/augeas/src/pathx.c:2341
168	168	2 : View List ['tree_fpath', 'tree_unlink']	168	168	tree_rm_dirty_files	call site: 04782	/src/augeas/src/augeas.c:701
66	66	2 : View List ['push_boolean_value', 'coerce_to_bool']	66	66	eval_else	call site: 00705	/src/augeas/src/pathx.c:1009
58	2917	5 : View List ['mem_alloc_n', 'rpl_free', 'path_of_tree', 'pathx_next', 'pathx_first']	58	3335	aug_match	call site: 04835	/src/augeas/src/augeas.c:1428
15	15	1 : View List ['free_span']	15	27	free_tree_node	call site: 00026	/src/augeas/src/augeas.c:650
4	16	3 : View List ['strlen', 'mem_realloc_n', 'strcat']	4	16	init_root	call site: 00047	/src/augeas/src/augeas.c:472
2	2	1 : View List ['argz_add_sep']	12	16	init_loadpath	call site: 00058	/src/augeas/src/augeas.c:492
2	2	1 : View List ['__ctype_b_loc']	2	2	step_matches	call site: 00375	/src/augeas/src/pathx.c:2720
0	5431	3 : View List ['eval_expr', 'ns_filter', 'pop_value_ind']	0	8183	eval_filter	call site: 00352	/src/augeas/src/pathx.c:1442
0	630	3 : View List ['make_step', 'match', 'parse_relative_location_path']	0	730	parse_path_expr	call site: 00172	/src/augeas/src/pathx.c:2387

Runtime coverage analysis

Covered functions

150

Functions that are reachable but not covered

888

Reachable functions

1039

Percentage of reachable functions covered

14.53%

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
augeas_escape_name_fuzzer.cc	2
src/augeas.c	53
src/memory.c	2
src/ref.c	1
src/info.c	10
gnulib/lib/free.c	1
src/errcode.c	4
src/./internal.h	2
src/pathx.c	101
src/regexp.c	24
gnulib/lib/./regcomp.c	45
gnulib/lib/./regex_internal.c	33
src/internal.c	22
src/fa.c	128
gnulib/lib/mbrtowc.c	1
gnulib/lib/hard-locale.c	1
gnulib/lib/setlocale_null.c	3
gnulib/lib/./regex_internal.h	12
gnulib/lib/./regexec.c	54
gnulib/lib/./malloc/dynarray-skeleton.c	7
gnulib/lib/malloc/dynarray_resize.c	1
gnulib/lib/./malloc/dynarray.h	1
src/syntax.c	79
src/builtin.c	40
src/lens.c	68
src/jmt.c	63
src/transform.c	31
src/parser.y	20
src/lexer.l	5
src/lexer.c	25
src/parser.c	8
src/hash.c	15
src/get.c	68
src/ast.c	6
src/put.c	35

Fuzzer: augeas_fa_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

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	694	98.5%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	10	1.42%
All colors	704	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
4888	4896	2 : View List ['load_module_file', 'rpl_free']	4888	4896	load_module	call site: 00000	/src/augeas/src/syntax.c:2018
599	599	2 : View List ['transit_state_bkref', 'check_subexp_matching_top']	1737	2380	check_matching	call site: 00000	/src/augeas/gnulib/lib/./regexec.c:1051
548	560	2 : View List ['free_lens', 'rpl_free']	548	560	free_lns_error	call site: 00000	/src/augeas/src/get.c:252
168	168	1 : View List ['fetch_number']	168	338	parse_dup_op	call site: 00000	/src/augeas/gnulib/lib/./regcomp.c:2491
168	168	2 : View List ['tree_fpath', 'tree_unlink']	168	168	tree_rm_dirty_files	call site: 00000	/src/augeas/src/augeas.c:701
124	124	2 : View List ['build_wcs_upper_buffer', 'build_wcs_buffer']	124	124	re_string_reconstruct	call site: 00000	/src/augeas/gnulib/lib/./regex_internal.c:790
82	93	2 : View List ['build_wcs_upper_buffer', 're_string_realloc_buffers']	82	93	re_string_construct	call site: 00000	/src/augeas/gnulib/lib/./regex_internal.c:92
82	89	2 : View List ['build_wcs_upper_buffer', 'build_upper_buffer']	82	89	extend_buffers	call site: 00000	/src/augeas/gnulib/lib/./regexec.c:3979
76	76	1 : View List ['pathx_symtab_undefine']	76	399	aug_defvar	call site: 00000	/src/augeas/src/augeas.c:895
51	62	2 : View List ['tree_child', 'tree_unlink']	51	62	record_var_meta	call site: 00000	/src/augeas/src/augeas.c:878
42	42	1 : View List ['build_wcs_buffer']	42	42	re_string_construct	call site: 00000	/src/augeas/gnulib/lib/./regex_internal.c:113
42	42	1 : View List ['build_wcs_buffer']	42	42	extend_buffers	call site: 00000	/src/augeas/gnulib/lib/./regexec.c:3992

Runtime coverage analysis

Covered functions

299

Functions that are reachable but not covered

158

Reachable functions

166

Percentage of reachable functions covered

4.82%

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.

Warning: The number of covered functions are larger than the number of reachable functions. This means that there are more functions covered at runtime than are extracted using static analysis. This is likely a result of the static analysis component failing to extract the right call graph or the coverage runtime being compiled with sanitizers in code that the static analysis has not analysed. This can happen if lto/gold is not used in all places that coverage instrumentation is used.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
augeas_fa_fuzzer.cc	1
src/fa.c	126
src/ref.c	1
src/memory.c	2
gnulib/lib/free.c	1
src/hash.c	15

Fuzzer: augeas_api_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

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	3892	79.6%
gold	[1:9]	17	0.34%
yellow	[10:29]	57	1.16%
greenyellow	[30:49]	11	0.22%
lawngreen	50+	909	18.6%
All colors	4886	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
4888	4896	2 : View List ['load_module_file', 'rpl_free']	4888	4896	load_module	call site: 01824	/src/augeas/src/syntax.c:2018
599	599	2 : View List ['transit_state_bkref', 'check_subexp_matching_top']	1737	2380	check_matching	call site: 01062	/src/augeas/gnulib/lib/./regexec.c:1051
548	560	2 : View List ['free_lens', 'rpl_free']	548	560	free_lns_error	call site: 03920	/src/augeas/src/get.c:252
168	168	1 : View List ['fetch_number']	168	338	parse_dup_op	call site: 00927	/src/augeas/gnulib/lib/./regcomp.c:2491
124	124	2 : View List ['build_wcs_upper_buffer', 'build_wcs_buffer']	124	124	re_string_reconstruct	call site: 01056	/src/augeas/gnulib/lib/./regex_internal.c:790
82	93	2 : View List ['build_wcs_upper_buffer', 're_string_realloc_buffers']	82	93	re_string_construct	call site: 00750	/src/augeas/gnulib/lib/./regex_internal.c:92
82	89	2 : View List ['build_wcs_upper_buffer', 'build_upper_buffer']	82	89	extend_buffers	call site: 01074	/src/augeas/gnulib/lib/./regexec.c:3979
76	76	1 : View List ['pathx_symtab_undefine']	76	399	aug_defvar	call site: 04790	/src/augeas/src/augeas.c:895
51	62	2 : View List ['tree_child', 'tree_unlink']	51	62	record_var_meta	call site: 04801	/src/augeas/src/augeas.c:878
42	42	1 : View List ['build_wcs_buffer']	42	42	re_string_construct	call site: 00771	/src/augeas/gnulib/lib/./regex_internal.c:113
42	42	1 : View List ['build_wcs_buffer']	42	42	extend_buffers	call site: 01076	/src/augeas/gnulib/lib/./regexec.c:3992
35	35	1 : View List ['make_regexp_from_glob']	37	2006	func_regexp_or_glob	call site: 00000	/src/augeas/src/pathx.c:805

Runtime coverage analysis

Covered functions

288

Functions that are reachable but not covered

763

Reachable functions

1044

Percentage of reachable functions covered

26.92%

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
augeas_api_fuzzer.cc	1
src/augeas.c	56
src/memory.c	2
src/ref.c	1
src/info.c	10
gnulib/lib/free.c	1
src/errcode.c	4
src/./internal.h	2
src/pathx.c	101
src/regexp.c	24
gnulib/lib/./regcomp.c	45
gnulib/lib/./regex_internal.c	33
src/internal.c	22
src/fa.c	128
gnulib/lib/mbrtowc.c	1
gnulib/lib/hard-locale.c	1
gnulib/lib/setlocale_null.c	3
gnulib/lib/./regex_internal.h	12
gnulib/lib/./regexec.c	54
gnulib/lib/./malloc/dynarray-skeleton.c	7
gnulib/lib/malloc/dynarray_resize.c	1
gnulib/lib/./malloc/dynarray.h	1
src/syntax.c	79
src/builtin.c	40
src/lens.c	68
src/jmt.c	63
src/transform.c	32
src/parser.y	20
src/lexer.l	5
src/lexer.c	25
src/parser.c	8
src/hash.c	15
src/get.c	68
src/ast.c	6
src/put.c	35

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
aug_save	/src/augeas/src/augeas.c	1	['struct.augeas *']	26	0	170	30	11	932	0	7065	199
func_regexp_flag	/src/augeas/src/pathx.c	2	['struct.state *', 'int']	14	0	88	16	5	177	0	1451	45
det_target	/src/augeas/src/jmt.c	4	['struct.jmt *', 'struct.array *', 'struct.nfa_state *', 'int']	6	0	197	26	10	22	0	91	40
aug_preview	/src/augeas/src/augeas.c	3	['struct.augeas *', 'char *', 'char **']	21	0	234	32	12	880	0	6771	39

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

Functions statically reachable by fuzzers

1019 / 1143

Cyclomatic complexity statically reachable by fuzzers

8534 / 9080

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

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
aug_match	48	25	52.08%	['augeas_escape_name_fuzzer']
pathx_expand_tree	62	34	54.83%	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']
free_term	52	19	36.53%	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']
free_value	43	20	46.51%	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']
interpreter_init	49	23	46.93%	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']
check_exp	118	23	19.49%	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']
peek_token	219	109	49.77%	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']
parse_expression	197	71	36.04%	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']
parse_bracket_exp	221	116	52.48%	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']
build_range_exp	60	31	51.66%	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']
parse_dup_op	110	38	34.54%	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']
create_initial_state	64	31	48.43%	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']
re_string_realloc_buffers	31	12	38.70%	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']
re_string_reconstruct	210	19	9.047%	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']
re_string_context_at	33	15	45.45%	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']
re_search_internal	235	106	45.10%	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']
extend_buffers	42	21	50.0%	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']
transit_state	35	15	42.85%	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']
func_int	31	12	38.70%	[]

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/augeas/src/lens.c	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']	[]
/src/augeas/gnulib/lib/hard-locale.c	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']	[]
/src/augeas/gnulib/lib/malloc/dynarray_resize.c	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']	[]
/src/augeas/src/internal.c	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']
/src/augeas/src/ref.c	['augeas_escape_name_fuzzer', 'augeas_fa_fuzzer', 'augeas_api_fuzzer']	['augeas_escape_name_fuzzer', 'augeas_fa_fuzzer', 'augeas_api_fuzzer']
/src/augeas/augeas_escape_name_fuzzer.cc	['augeas_escape_name_fuzzer']	['augeas_escape_name_fuzzer']
/src/augeas/src/augeas.c	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']
/src/augeas/src/ast.c	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']	[]
/src/augeas/gnulib/lib/free.c	['augeas_escape_name_fuzzer', 'augeas_fa_fuzzer', 'augeas_api_fuzzer']	['augeas_escape_name_fuzzer', 'augeas_fa_fuzzer', 'augeas_api_fuzzer']
/src/augeas/src/lexer.c	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']	[]
/src/augeas/src/./internal.h	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']	[]
/src/augeas/src/parser.y	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']	[]
/src/augeas/gnulib/lib/setlocale_null.c	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']	[]
/src/augeas/src/syntax.c	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']
/src/augeas/src/put.c	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']	[]
/src/augeas/gnulib/lib/./regexec.c	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']	[]
/src/augeas/src/hash.c	['augeas_escape_name_fuzzer', 'augeas_fa_fuzzer', 'augeas_api_fuzzer']	[]
/src/augeas/src/errcode.c	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']
/src/augeas/gnulib/lib/mbrtowc.c	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']	[]
/src/augeas/src/lexer.l	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']	[]
/src/augeas/src/get.c	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']	['augeas_api_fuzzer']
/src/augeas/gnulib/lib/./malloc/dynarray.h	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']	[]
/src/augeas/src/info.c	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']
/src/augeas/gnulib/lib/./malloc/dynarray-skeleton.c	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']	[]
/src/augeas/src/builtin.c	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']
/src/augeas/augeas_fa_fuzzer.cc	['augeas_fa_fuzzer']	['augeas_fa_fuzzer']
/src/augeas/src/jmt.c	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']	[]
/src/augeas/gnulib/lib/./regex_internal.c	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']	[]
/src/augeas/gnulib/lib/./regex_internal.h	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']	[]
/src/augeas/src/fa.c	['augeas_escape_name_fuzzer', 'augeas_fa_fuzzer', 'augeas_api_fuzzer']	['augeas_escape_name_fuzzer', 'augeas_fa_fuzzer', 'augeas_api_fuzzer']
/src/augeas/src/transform.c	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']
/src/augeas/src/regexp.c	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']	['augeas_api_fuzzer']
/src/augeas/gnulib/lib/./regcomp.c	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']	[]
/src/augeas/augeas_api_fuzzer.cc	['augeas_api_fuzzer']	['augeas_api_fuzzer']
/src/augeas/src/memory.c	['augeas_escape_name_fuzzer', 'augeas_fa_fuzzer', 'augeas_api_fuzzer']	['augeas_escape_name_fuzzer', 'augeas_fa_fuzzer', 'augeas_api_fuzzer']
/src/augeas/gnulib/lib/./selinux/selinux.h	[]	[]
/src/augeas/src/pathx.c	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']
/src/augeas/src/parser.c	['augeas_escape_name_fuzzer', 'augeas_api_fuzzer']	[]

Directories in report

Directory
/src/augeas/gnulib/lib/./malloc/
/src/augeas/src/
/src/augeas/gnulib/lib/
/src/augeas/gnulib/lib/./
/src/augeas/src/./
/src/augeas/
/src/augeas/gnulib/lib/malloc/
/src/augeas/gnulib/lib/./selinux/