High level conclusions

Fuzzers reach 20.55% of cyclomatic complexity.

Fuzzers reach 20.49% of all functions.

Reachability and coverage overview

Functions statically reachable by fuzzers

158 / 771

Cyclomatic complexity statically reachable by fuzzers

1060 / 5157

Runtime code coverage of functions

132 / 771

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: ext2fs_check_directory_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	146	59.8%
gold	[1:9]	4	1.63%
yellow	[10:29]	5	2.04%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	89	36.4%
All colors	244	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
133	133	1 : View List ['ext2fs_flush2']	133	358	ext2fs_close2	call site: 00216	/src/e2fsprogs/lib/ext2fs/closefs.c:508
74	74	1 : View List ['raw_write_blk']	74	74	reuse_cache	call site: 00000	/src/e2fsprogs/lib/ext2fs/unix_io.c:557
46	46	1 : View List ['ext2fs_free_block_bitmap']	114	158	ext2fs_free	call site: 00156	/src/e2fsprogs/lib/ext2fs/freefs.c:41
46	46	1 : View List ['ext2fs_free_inode_bitmap']	68	112	ext2fs_free	call site: 00157	/src/e2fsprogs/lib/ext2fs/freefs.c:43
16	16	3 : View List ['ext2fs_has_feature_sparse_super', 'test_root', 'ext2fs_has_feature_sparse_super2']	16	16	ext2fs_bg_has_super	call site: 00060	/src/e2fsprogs/lib/ext2fs/closefs.c:38
14	27	5 : View List ['free_cache', 'pthread_mutex_destroy', 'pthread_mutex_init', 'close', 'ext2fs_free_mem']	14	27	unix_open_channel	call site: 00000	/src/e2fsprogs/lib/ext2fs/unix_io.c:844
9	9	1 : View List ['ext2fs_get_dio_alignment']	35	85	unix_open_channel	call site: 00000	/src/e2fsprogs/lib/ext2fs/unix_io.c:745
9	9	1 : View List ['ext2fs_free_dblist']	14	56	ext2fs_free	call site: 00173	/src/e2fsprogs/lib/ext2fs/freefs.c:52
8	8	1 : View List ['ext2fs_badblocks_list_free']	22	64	ext2fs_free	call site: 00172	/src/e2fsprogs/lib/ext2fs/freefs.c:48
7	127	3 : View List ['ext2fs_hashmap_create', 'ext2fs_set_feature_shared_blocks', 'ext2fs_free']	7	131	ext2fs_open2	call site: 00140	/src/e2fsprogs/lib/ext2fs/openfs.c:527
6	6	2 : View List ['setrlimit', 'getrlimit']	20	33	unix_open_channel	call site: 00000	/src/e2fsprogs/lib/ext2fs/unix_io.c:823
6	6	1 : View List ['pthread_mutex_destroy']	6	12	unix_close	call site: 00000	/src/e2fsprogs/lib/ext2fs/unix_io.c:955

Runtime coverage analysis

Covered functions

68

Functions that are reachable but not covered

82

Reachable functions

130

Percentage of reachable functions covered

36.92%

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
/src/fuzz/ext2fs_check_directory_fuzzer.cc	1
/src/e2fsprogs/lib/ext2fs/openfs.c	4
/src/e2fsprogs/lib/ext2fs/./ext2fs.h	8
/src/e2fsprogs/lib/ext2fs/getenv.c	1
/src/e2fsprogs/lib/ext2fs/io_manager.c	7
/src/e2fsprogs/lib/ext2fs/inline.c	1
/src/e2fsprogs/lib/ext2fs/csum.c	11
/src/e2fsprogs/lib/ext2fs/./ext2_fs.h	14
/src/e2fsprogs/lib/ext2fs/crc32c.c	3
/src/e2fsprogs/lib/ext2fs/blknum.c	8
/src/e2fsprogs/lib/ext2fs/../../lib/ext2fs/ext2_fs.h	2
/src/e2fsprogs/lib/ext2fs/closefs.c	8
/src/e2fsprogs/lib/ext2fs/crc16.c	1
/src/e2fsprogs/lib/ext2fs/mmp.c	5
/src/e2fsprogs/lib/ext2fs/getsectsize.c	1
/src/e2fsprogs/lib/ext2fs/llseek.c	2
/src/e2fsprogs/lib/ext2fs/hashmap.c	2
/src/e2fsprogs/lib/ext2fs/nls_utf8.c	1
/src/e2fsprogs/lib/ext2fs/freefs.c	4
/src/e2fsprogs/lib/ext2fs/bitmaps.c	2
/src/e2fsprogs/lib/ext2fs/gen_bitmap64.c	2
/src/e2fsprogs/lib/ext2fs/gen_bitmap.c	2
/src/e2fsprogs/lib/ext2fs/inode.c	6
/src/e2fsprogs/lib/ext2fs/mkjournal.c	1
/src/e2fsprogs/lib/ext2fs/./ext2fsP.h	1

Fuzzer: ext2fs_read_bitmap_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	224	52.8%
gold	[1:9]	2	0.47%
yellow	[10:29]	11	2.59%
greenyellow	[30:49]	3	0.70%
lawngreen	50+	184	43.3%
All colors	424	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
185	185	1 : View List ['write_bitmaps']	185	185	ext2fs_rw_bitmaps	call site: 00194	/src/e2fsprogs/lib/ext2fs/rw_bitmaps.c:541
133	133	1 : View List ['ext2fs_flush2']	133	358	ext2fs_close2	call site: 00396	/src/e2fsprogs/lib/ext2fs/closefs.c:508
86	86	1 : View List ['ext2fs_alloc_generic_bmap']	86	86	ext2fs_allocate_inode_bitmap	call site: 00282	/src/e2fsprogs/lib/ext2fs/bitmaps.c:72
86	86	1 : View List ['ext2fs_alloc_generic_bmap']	86	86	ext2fs_allocate_block_bitmap	call site: 00253	/src/e2fsprogs/lib/ext2fs/bitmaps.c:107
74	74	1 : View List ['raw_write_blk']	74	74	reuse_cache	call site: 00000	/src/e2fsprogs/lib/ext2fs/unix_io.c:557
50	454	12 : View List ['pthread_attr_destroy', 'pthread_attr_init', 'free', 'read_bitmaps_range_prepare', 'ext2fs_has_feature_flex_bg', 'read_bitmaps_cleanup_on_error', 'pthread_create', 'sysconf', 'calloc', 'pthread_join', 'io_channel_set_options', 'read_bitmaps_range_end']	50	890	ext2fs_rw_bitmaps	call site: 00195	/src/e2fsprogs/lib/ext2fs/rw_bitmaps.c:546
14	27	5 : View List ['free_cache', 'pthread_mutex_destroy', 'pthread_mutex_init', 'close', 'ext2fs_free_mem']	14	27	unix_open_channel	call site: 00000	/src/e2fsprogs/lib/ext2fs/unix_io.c:844
9	9	1 : View List ['ext2fs_get_dio_alignment']	35	85	unix_open_channel	call site: 00000	/src/e2fsprogs/lib/ext2fs/unix_io.c:745
9	9	1 : View List ['ext2fs_free_dblist']	22	56	ext2fs_free	call site: 00172	/src/e2fsprogs/lib/ext2fs/freefs.c:52
8	8	1 : View List ['ext2fs_badblocks_list_free']	30	64	ext2fs_free	call site: 00171	/src/e2fsprogs/lib/ext2fs/freefs.c:48
8	8	1 : View List ['ext2fs_free_inode_cache']	13	47	ext2fs_free	call site: 00176	/src/e2fsprogs/lib/ext2fs/freefs.c:55
7	127	3 : View List ['ext2fs_hashmap_create', 'ext2fs_set_feature_shared_blocks', 'ext2fs_free']	7	131	ext2fs_open2	call site: 00139	/src/e2fsprogs/lib/ext2fs/openfs.c:527

Runtime coverage analysis

Covered functions

118

Functions that are reachable but not covered

97

Reachable functions

187

Percentage of reachable functions covered

48.13%

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/fuzz/ext2fs_read_bitmap_fuzzer.cc	1
/src/e2fsprogs/lib/ext2fs/openfs.c	4
/src/e2fsprogs/lib/ext2fs/./ext2fs.h	9
/src/e2fsprogs/lib/ext2fs/getenv.c	1
/src/e2fsprogs/lib/ext2fs/io_manager.c	7
/src/e2fsprogs/lib/ext2fs/inline.c	1
/src/e2fsprogs/lib/ext2fs/csum.c	14
/src/e2fsprogs/lib/ext2fs/./ext2_fs.h	15
/src/e2fsprogs/lib/ext2fs/crc32c.c	3
/src/e2fsprogs/lib/ext2fs/blknum.c	14
/src/e2fsprogs/lib/ext2fs/../../lib/ext2fs/ext2_fs.h	2
/src/e2fsprogs/lib/ext2fs/closefs.c	8
/src/e2fsprogs/lib/ext2fs/crc16.c	1
/src/e2fsprogs/lib/ext2fs/mmp.c	5
/src/e2fsprogs/lib/ext2fs/getsectsize.c	1
/src/e2fsprogs/lib/ext2fs/llseek.c	2
/src/e2fsprogs/lib/ext2fs/hashmap.c	2
/src/e2fsprogs/lib/ext2fs/nls_utf8.c	1
/src/e2fsprogs/lib/ext2fs/freefs.c	4
/src/e2fsprogs/lib/ext2fs/bitmaps.c	8
/src/e2fsprogs/lib/ext2fs/gen_bitmap64.c	9
/src/e2fsprogs/lib/ext2fs/gen_bitmap.c	8
/src/e2fsprogs/lib/ext2fs/inode.c	1
/src/e2fsprogs/lib/ext2fs/mkjournal.c	1
/src/e2fsprogs/lib/ext2fs/rw_bitmaps.c	14
/src/e2fsprogs/lib/et/com_err.c	2
/src/e2fsprogs/lib/ext2fs/bitops.c	2
/src/e2fsprogs/lib/ext2fs/get_num_dirs.c	1
/src/e2fsprogs/lib/ext2fs/alloc_sb.c	1
/src/e2fsprogs/lib/ext2fs/../../lib/ext2fs/bitops.h	2
/src/e2fsprogs/lib/ext2fs/./ext2fsP.h	1

Fuzzer: ext2fs_image_read_write_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	262	57.0%
gold	[1:9]	6	1.30%
yellow	[10:29]	3	0.65%
greenyellow	[30:49]	1	0.21%
lawngreen	50+	187	40.7%
All colors	459	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
570	570	1 : View List ['ext2fs_read_inode_bitmap']	578	601	ext2fs_image_bitmap_write	call site: 00406	/src/e2fsprogs/lib/ext2fs/imager.c:347
570	570	1 : View List ['ext2fs_read_inode_bitmap']	574	597	ext2fs_image_bitmap_read	call site: 00191	/src/e2fsprogs/lib/ext2fs/imager.c:425
197	243	5 : View List ['strcat', 'ext2fs_free_block_bitmap', 'strcpy', 'ext2fs_free_inode_bitmap', 'ext2fs_allocate_inode_bitmap']	197	247	read_bitmaps_range_prepare	call site: 00251	/src/e2fsprogs/lib/ext2fs/rw_bitmaps.c:259
185	185	1 : View List ['write_bitmaps']	185	185	ext2fs_rw_bitmaps	call site: 00194	/src/e2fsprogs/lib/ext2fs/rw_bitmaps.c:541
133	133	1 : View List ['ext2fs_flush2']	133	358	ext2fs_close2	call site: 00431	/src/e2fsprogs/lib/ext2fs/closefs.c:508
86	86	1 : View List ['ext2fs_alloc_generic_bmap']	86	86	ext2fs_allocate_block_bitmap	call site: 00253	/src/e2fsprogs/lib/ext2fs/bitmaps.c:107
74	74	1 : View List ['raw_write_blk']	74	74	reuse_cache	call site: 00000	/src/e2fsprogs/lib/ext2fs/unix_io.c:557
50	454	12 : View List ['pthread_attr_destroy', 'pthread_attr_init', 'free', 'read_bitmaps_range_prepare', 'ext2fs_has_feature_flex_bg', 'read_bitmaps_cleanup_on_error', 'pthread_create', 'sysconf', 'calloc', 'pthread_join', 'io_channel_set_options', 'read_bitmaps_range_end']	50	890	ext2fs_rw_bitmaps	call site: 00195	/src/e2fsprogs/lib/ext2fs/rw_bitmaps.c:546
46	46	1 : View List ['ext2fs_free_inode_bitmap']	76	112	ext2fs_free	call site: 00155	/src/e2fsprogs/lib/ext2fs/freefs.c:43
14	27	5 : View List ['free_cache', 'pthread_mutex_destroy', 'pthread_mutex_init', 'close', 'ext2fs_free_mem']	14	27	unix_open_channel	call site: 00000	/src/e2fsprogs/lib/ext2fs/unix_io.c:844
9	73	5 : View List ['io_channel_write_blk64', 'ext2fs_flush_icache', 'read', 'ext2fs_inode_table_loc', '__errno_location']	9	73	ext2fs_image_inode_read	call site: 00400	/src/e2fsprogs/lib/ext2fs/imager.c:179
9	9	1 : View List ['ext2fs_get_dio_alignment']	35	85	unix_open_channel	call site: 00000	/src/e2fsprogs/lib/ext2fs/unix_io.c:745

Runtime coverage analysis

Covered functions

121

Functions that are reachable but not covered

101

Reachable functions

195

Percentage of reachable functions covered

48.21%

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/fuzz/ext2fs_image_read_write_fuzzer.cc	1
/src/e2fsprogs/lib/ext2fs/openfs.c	4
/src/e2fsprogs/lib/ext2fs/./ext2fs.h	9
/src/e2fsprogs/lib/ext2fs/getenv.c	1
/src/e2fsprogs/lib/ext2fs/io_manager.c	7
/src/e2fsprogs/lib/ext2fs/inline.c	1
/src/e2fsprogs/lib/ext2fs/csum.c	14
/src/e2fsprogs/lib/ext2fs/./ext2_fs.h	15
/src/e2fsprogs/lib/ext2fs/crc32c.c	3
/src/e2fsprogs/lib/ext2fs/blknum.c	14
/src/e2fsprogs/lib/ext2fs/../../lib/ext2fs/ext2_fs.h	2
/src/e2fsprogs/lib/ext2fs/closefs.c	8
/src/e2fsprogs/lib/ext2fs/crc16.c	1
/src/e2fsprogs/lib/ext2fs/mmp.c	5
/src/e2fsprogs/lib/ext2fs/getsectsize.c	1
/src/e2fsprogs/lib/ext2fs/llseek.c	2
/src/e2fsprogs/lib/ext2fs/hashmap.c	2
/src/e2fsprogs/lib/ext2fs/nls_utf8.c	1
/src/e2fsprogs/lib/ext2fs/freefs.c	4
/src/e2fsprogs/lib/ext2fs/bitmaps.c	8
/src/e2fsprogs/lib/ext2fs/gen_bitmap64.c	9
/src/e2fsprogs/lib/ext2fs/gen_bitmap.c	8
/src/e2fsprogs/lib/ext2fs/inode.c	2
/src/e2fsprogs/lib/ext2fs/mkjournal.c	1
/src/e2fsprogs/lib/ext2fs/imager.c	7
/src/e2fsprogs/lib/ext2fs/rw_bitmaps.c	14
/src/e2fsprogs/lib/et/com_err.c	2
/src/e2fsprogs/lib/ext2fs/bitops.c	2
/src/e2fsprogs/lib/ext2fs/get_num_dirs.c	1
/src/e2fsprogs/lib/ext2fs/alloc_sb.c	1
/src/e2fsprogs/lib/ext2fs/../../lib/ext2fs/bitops.h	2
/src/e2fsprogs/lib/ext2fs/./ext2fsP.h	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
ext2fs_symlink	/src/e2fsprogs/lib/ext2fs/symlink.c	5	['N/A', 'int', 'int', 'N/A', 'N/A']	28	0	497	79	32	384	0	2898	2198
ext2fs_add_journal_inode	/src/e2fsprogs/lib/ext2fs/mkjournal.c	3	['N/A', 'int', 'int']	22	0	24	3	2	245	0	1785	177
unix_read_blk	/src/e2fsprogs/lib/ext2fs/unix_io.c	4	['N/A', 'size_t', 'int', 'N/A']	6	0	28	3	2	24	0	177	140
rb_unmark_bmap_extent	/src/e2fsprogs/lib/ext2fs/blkmap64_rb.c	3	['N/A', 'size_t', 'int']	5	0	42	5	2	19	0	125	120
ext2fs_get_next_inode	/src/e2fsprogs/lib/ext2fs/inode.c	3	['N/A', 'N/A', 'N/A']	8	0	24	3	2	33	0	204	93
unix_open	/src/e2fsprogs/lib/ext2fs/unix_io.c	3	['N/A', 'int', 'N/A']	5	0	101	14	6	33	0	129	76
utf8_casefold_cmp	/src/e2fsprogs/lib/ext2fs/nls_utf8.c	5	['N/A', 'N/A', 'size_t', 'N/A', 'size_t']	5	0	116	19	8	9	0	70	70
ext2fs_open_inode_scan	/src/e2fsprogs/lib/ext2fs/inode.c	3	['N/A', 'int', 'N/A']	19	0	465	52	21	191	0	1384	68
ext2fs_get_free_blocks	/src/e2fsprogs/lib/ext2fs/alloc.c	6	['N/A', 'int', 'int', 'int', 'N/A', 'N/A']	7	0	59	6	3	19	0	107	58
default_com_err_proc	/src/e2fsprogs/lib/et/com_err.c	4	['N/A', 'size_t', 'N/A', 'N/A']	2	0	145	25	10	14	0	54	50

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

Functions statically reachable by fuzzers

494 / 771

Cyclomatic complexity statically reachable by fuzzers

4042 / 5157

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 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/fuzz/ext2fs_check_directory_fuzzer.cc

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=['ext2fs_llseek', 'ext2fs_close', 'ext2fs_free', 'ext2fs_group_desc', 'ext2fs_open2', 'ext2fs_mmp_stop', 'ext2fs_descriptor_block_loc2']

/src/fuzz/ext2fs_read_bitmap_fuzzer.cc

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=['ext2fs_llseek', 'ext2fs_free_inode_bitmap', 'ext2fs_allocate_block_bitmap', 'ext2fs_inode_bitmap_loc', 'ext2fs_block_bitmap_loc', 'ext2fs_open2', 'com_err', 'ext2fs_super_and_bgd_loc2', 'ext2fs_group_desc', 'ext2fs_close']

/src/fuzz/ext2fs_image_read_write_fuzzer.cc

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=['ext2fs_llseek', 'ext2fs_free_generic_bitmap', 'ext2fs_allocate_block_bitmap', 'read_bitmaps_range_start', 'ext2fs_inode_bitmap_loc', 'ext2fs_block_bitmap_loc', 'ext2fs_open2', 'ext2fs_super_and_bgd_loc2', 'ext2fs_group_desc', 'ext2fs_get_generic_bmap_range']

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
ext2fs_zero_blocks2	53	9	16.98%	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']
unix_open_channel	127	62	48.81%	[]
flush_cached_blocks	62	16	25.80%	[]
raw_read_blk	93	46	49.46%	[]
error_message	67	30	44.77%	[]
ext2fs_rw_bitmaps	96	22	22.91%	['ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']

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/e2fsprogs/lib/ext2fs/dir_iterate.c	[]	[]
/src/e2fsprogs/lib/ext2fs/inode.c	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	['ext2fs_check_directory_fuzzer', 'ext2fs_image_read_write_fuzzer']
/usr/local/bin/../include/c++/v1/stdexcept	[]	[]
/src/e2fsprogs/lib/ext2fs/block.c	[]	[]
/src/e2fsprogs/lib/ext2fs/freefs.c	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']
/src/e2fsprogs/lib/ext2fs/imager.c	['ext2fs_image_read_write_fuzzer']	['ext2fs_image_read_write_fuzzer']
/src/e2fsprogs/lib/ext2fs/io_manager.c	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']
/src/e2fsprogs/lib/ext2fs/extent.c	[]	[]
/src/e2fsprogs/lib/ext2fs/ind_block.c	[]	[]
/src/e2fsprogs/lib/ext2fs/crc32c.c	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']
/src/e2fsprogs/lib/et/error_message.c	[]	[]
/src/fuzz/ext2fs_image_read_write_fuzzer.cc	['ext2fs_image_read_write_fuzzer']	['ext2fs_image_read_write_fuzzer']
/src/e2fsprogs/lib/ext2fs/blknum.c	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']
/src/e2fsprogs/lib/ext2fs/punch.c	[]	[]
/src/e2fsprogs/lib/ext2fs/symlink.c	[]	[]
/src/e2fsprogs/lib/ext2fs/ext_attr.c	[]	[]
/src/e2fsprogs/lib/ext2fs/link.c	[]	[]
/src/e2fsprogs/lib/ext2fs/read_bb.c	[]	[]
/src/e2fsprogs/lib/ext2fs/nls_utf8.c	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']
/src/e2fsprogs/lib/ext2fs/alloc_sb.c	['ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	['ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']
/src/e2fsprogs/lib/ext2fs/../../lib/ext2fs/bitops.h	['ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	[]
/src/fuzz/ext2fs_check_directory_fuzzer.cc	['ext2fs_check_directory_fuzzer']	['ext2fs_check_directory_fuzzer']
/src/e2fsprogs/lib/ext2fs/bmap.c	[]	[]
/src/e2fsprogs/lib/ext2fs/bitops.c	['ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	['ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']
/src/e2fsprogs/lib/ext2fs/closefs.c	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']
/src/e2fsprogs/lib/ext2fs/./ext2fs.h	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	[]
/src/e2fsprogs/lib/ext2fs/get_num_dirs.c	['ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	[]
/src/e2fsprogs/lib/ext2fs/valid_blk.c	[]	[]
/src/e2fsprogs/lib/ext2fs/rbtree.c	[]	[]
/src/e2fsprogs/lib/ext2fs/fallocate.c	[]	[]
/src/e2fsprogs/lib/ext2fs/crc16.c	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	['ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']
/src/e2fsprogs/lib/ext2fs/gen_bitmap64.c	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	['ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']
/src/e2fsprogs/lib/et/com_err.c	['ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	['ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']
/src/e2fsprogs/lib/et/et_name.c	[]	[]
/src/e2fsprogs/lib/ext2fs/ismounted.c	[]	[]
/src/e2fsprogs/lib/ext2fs/./rbtree.h	[]	[]
/src/e2fsprogs/lib/ext2fs/badblocks.c	[]	[]
/src/e2fsprogs/lib/ext2fs/../../lib/ext2fs/ext2_fs.h	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	[]
/src/e2fsprogs/lib/ext2fs/inline.c	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	[]
/src/e2fsprogs/lib/ext2fs/hashmap.c	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	[]
/src/e2fsprogs/lib/ext2fs/bitmaps.c	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	['ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']
/src/e2fsprogs/lib/ext2fs/fileio.c	[]	[]
/src/e2fsprogs/lib/ext2fs/alloc.c	[]	[]
/src/e2fsprogs/lib/ext2fs/csum.c	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']
/src/e2fsprogs/lib/ext2fs/alloc_stats.c	[]	[]
/src/e2fsprogs/lib/ext2fs/dirhash.c	[]	[]
/src/e2fsprogs/lib/ext2fs/i_block.c	[]	[]
/src/e2fsprogs/lib/ext2fs/llseek.c	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']
/src/e2fsprogs/lib/ext2fs/mmp.c	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']
/src/e2fsprogs/lib/ext2fs/openfs.c	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']
/src/e2fsprogs/lib/ext2fs/dirblock.c	[]	[]
/src/e2fsprogs/lib/ext2fs/getsectsize.c	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	[]
/src/e2fsprogs/lib/ext2fs/getenv.c	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']
/src/e2fsprogs/lib/ext2fs/blkmap64_ba.c	[]	[]
/src/e2fsprogs/lib/ext2fs/sha512.c	[]	[]
/src/e2fsprogs/lib/ext2fs/mkjournal.c	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']
/src/e2fsprogs/lib/ext2fs/./ext2fsP.h	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	[]
/src/e2fsprogs/lib/ext2fs/gen_bitmap.c	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	['ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']
/src/e2fsprogs/lib/ext2fs/./ext2_fs.h	['ext2fs_check_directory_fuzzer', 'ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	[]
/src/e2fsprogs/lib/ext2fs/inline_data.c	[]	[]
/src/e2fsprogs/lib/ext2fs/rw_bitmaps.c	['ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']	['ext2fs_read_bitmap_fuzzer', 'ext2fs_image_read_write_fuzzer']
/src/e2fsprogs/lib/ext2fs/lookup.c	[]	[]
/src/e2fsprogs/lib/ext2fs/blkmap64_rb.c	[]	[]
/src/fuzz/ext2fs_read_bitmap_fuzzer.cc	['ext2fs_read_bitmap_fuzzer']	['ext2fs_read_bitmap_fuzzer']
/src/e2fsprogs/lib/ext2fs/unix_io.c	[]	[]

Directories in report

Directory
/src/fuzz/
/usr/local/bin/../include/c++/v1/
/src/e2fsprogs/lib/ext2fs/
/src/e2fsprogs/lib/ext2fs/../../lib/ext2fs/
/src/e2fsprogs/lib/et/
/src/e2fsprogs/lib/ext2fs/./