High level conclusions

Fuzzer test_blkid_fuzz is blocked:

The runtime code coverage of test_blkid_fuzz covers 22.72% of its statically reachable code. This means there is some place that blocks the fuzzer to continue exploring more code at run time.

Fuzzer test_last_fuzz is blocked:

The runtime code coverage of test_last_fuzz covers 22.05% of its statically reachable code. This means there is some place that blocks the fuzzer to continue exploring more code at run time.

Fuzzers reach 25.23% of cyclomatic complexity.

Fuzzers reach 22.44% of all functions.

Reachability and coverage overview

Functions statically reachable by fuzzers

417/1858

Cyclomatic complexity statically reachable by fuzzers

3417/13541

Runtime code coverage of functions

594 / 1858

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: test_last_fuzz

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	53	36.5%
gold	[1:9]	1	0.68%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	91	62.7%
All colors	145	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
14	14	1 : View List ['dns_lookup']	16	195	list	call site: 00080	/src/util-linux/login-utils/last.c:513
8	8	2 : View List ['strcmp', 'strncmp']	44	351	list	call site: 00035	/src/util-linux/login-utils/last.c:411
4	4	2 : View List ['warn', 'gettext']	4	4	uread	call site: 00022	/src/util-linux/login-utils/last.c:214
4	4	2 : View List ['warn', 'gettext']	4	4	uread	call site: 00026	/src/util-linux/login-utils/last.c:251
4	4	2 : View List ['gettext', 'errx']	4	4	list	call site: 00064	/src/util-linux/login-utils/last.c:448
2	2	1 : View List ['err']	4	4	process_wtmp_file	call site: 00028	/src/util-linux/login-utils/last.c:696
2	2	1 : View List ['errx']	4	4	process_wtmp_file	call site: 00139	/src/util-linux/login-utils/last.c:899
2	2	1 : View List ['putchar']	2	2	list	call site: 00090	/src/util-linux/login-utils/last.c:552
0	0	None	36	343	list	call site: 00039	/src/util-linux/login-utils/last.c:429
0	0	None	32	2209	process_wtmp_file	call site: 00031	/src/util-linux/login-utils/last.c:716
0	0	None	32	2209	process_wtmp_file	call site: 00031	/src/util-linux/login-utils/last.c:719
0	0	None	32	2209	process_wtmp_file	call site: 00031	/src/util-linux/login-utils/last.c:724

Runtime coverage analysis

Covered functions

15

Functions that are reachable but not covered

53

Reachable functions

68

Percentage of reachable functions covered

22.06%

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
login-utils/last.c	8
lib/fileutils.c	1
./include/all-io.h	1
./include/c.h	1
./include/strutils.h	2
lib/timeutils.c	3
./include/carefulputc.h	1
./include/cctype.h	1
./include/xalloc.h	2

Fuzzer: test_blkid_fuzz

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	265	76.8%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	80	23.1%
All colors	345	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
511	525	24 : View List ['blkid_probe_get_sectorsize', 'parse_dos_extended', 'dos_partition_get_size', 'blkid_partition_is_logical', 'blkid_partlist_add_partition', 'blkid_partitions_do_subprobe', 'blkid_partition_get_type', 'blkid_partition_get_size', 'blkid_partition_set_type', 'blkid_partition_set_flags', 'blkid_partlist_increment_partno', 'blkid_partlist_get_partition', 'blkid_partition_gen_uuid', 'blkid_probe_is_tiny', 'blkid_partlist_new_parttable', 'dos_partition_get_start', 'ul_debug.2143', 'is_extended', 'blkid_partlist_numof_partitions', 'blkid_partition_is_extended', 'blkid_probe_get_partlist', 'blkid_parttable_set_id', 'blkid_partlist_set_partno', 'getpid']	511	525	probe_dos_pt	call site: 00000	/src/util-linux/libblkid/src/partitions/dos.c:253
282	284	7 : View List ['parse_extended', 'memcmp', 'blkid_partlist_increment_partno', 'blkid_probe_get_partlist', 'blkid_partlist_new_parttable', 'parse_partition', 'is_id_common']	282	284	probe_atari_pt	call site: 00000	/src/util-linux/libblkid/src/partitions/atari.c:253
98	183	2 : View List ['blkid_probe_get_buffer', 'sb_log_offset']	102	627	probe_btrfs	call site: 00000	/src/util-linux/libblkid/src/superblocks/btrfs.c:255
85	159	11 : View List ['blkid_partition_set_name', 'blkid_partition_set_type_string', 'blkid_partlist_add_partition', 'ul_debug.2240', 'blkid_partlist_new_parttable', '__bswap_32.2241', 'get_mac_block', 'has_part_signature', 'blkid_probe_get_partlist', '__errno_location', 'getpid']	85	159	probe_mac_pt	call site: 00000	/src/util-linux/libblkid/src/partitions/mac.c:113
84	202	17 : View List ['blkid_probe_verify_csum', 'blkid_partlist_add_partition', 'blkid_partlist_get_parent', 'blkid_partition_get_type', 'blkid_is_nested_dimension', '__errno_location', 'ul_debug.2094', 'bsd_checksum', 'blkid_partition_get_size', 'blkid_partition_set_type', 'blkid_partlist_new_parttable', '__uint16_identity.2095', 'blkid_probe_get_sector', 'blkid_probe_get_partlist', '__uint32_identity.2093', 'blkid_partition_get_start', 'getpid']	84	202	probe_bsd_pt	call site: 00000	/src/util-linux/libblkid/src/partitions/bsd.c:54
66	68	10 : View List ['blkid_partition_set_flags', 'blkid_partlist_increment_partno', 'blkid_partlist_add_partition', 'blkid_partlist_new_parttable', '__bswap_16', 'blkid_probe_get_partlist', 'ul_debug.442', '__bswap_32.441', 'getpid', 'blkid_partition_set_type']	66	68	probe_sun_pt	call site: 00000	/src/util-linux/libblkid/src/partitions/sun.c:42
54	56	6 : View List ['__bswap_32', 'blkid_partlist_increment_partno', 'blkid_probe_get_partlist', 'blkid_partlist_add_partition', 'blkid_partlist_new_parttable', 'blkid_partition_set_type']	54	56	probe_sgi_pt	call site: 00000	/src/util-linux/libblkid/src/partitions/sgi.c:40
46	48	4 : View List ['blkid_partlist_add_partition', 'blkid_partlist_new_parttable', 'blkid_partlist_increment_partno', 'blkid_probe_get_partlist']	46	48	probe_ultrix_pt	call site: 00000	/src/util-linux/libblkid/src/partitions/ultrix.c:63
37	37	1 : View List ['partitions_init_data']	828	1036	partitions_probe	call site: 00000	/src/util-linux/libblkid/src/partitions/partitions.c:591
30	58	3 : View List ['blkid_probe_chain_reset_values', 'reset_partlist', 'blkid_probe_get_partlist']	34	114	idinfo_probe	call site: 00000	/src/util-linux/libblkid/src/partitions/partitions.c:554
20	22	2 : View List ['blkid_partlist_new_parttable', 'blkid_probe_get_partlist']	20	22	probe_aix_pt	call site: 00000	/src/util-linux/libblkid/src/partitions/aix.c:23
15	15	3 : View List ['ul_debug.1700', 'blkid_get_library_version', 'getpid']	23	23	blkid_init_debug	call site: 00000	/src/util-linux/libblkid/src/init.c:55

Runtime coverage analysis

Covered functions

251

Functions that are reachable but not covered

102

Reachable functions

132

Percentage of reachable functions covered

22.73%

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
libblkid/src/fuzz.c	2
libblkid/src/probe.c	23
./include/debug.h	1
./include/list.h	5
lib/blkdev.c	3
./include/all-io.h	1
./include/c.h	1
lib/sysfs.c	15
lib/path.c	17
./include/debugobj.h	1
./include/sysfs.h	2
lib/fileutils.c	3
libblkid/src/devno.c	1
./include/fileutils.h	1
./include/strutils.h	2
libblkid/src/tag.c	1
libblkid/src/partitions/partitions.c	2
libblkid/src/superblocks/superblocks.c	2

Fuzzer: test_mount_fuzz

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	435	36.5%
gold	[1:9]	182	15.2%
yellow	[10:29]	48	4.03%
greenyellow	[30:49]	104	8.73%
lawngreen	50+	421	35.3%
All colors	1190	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
773	887	29 : View List ['blkid_probe_get_sectorsize', 'parse_dos_extended', 'dos_partition_get_size', 'blkid_partition_is_logical', 'blkid_partlist_add_partition', 'blkid_partitions_do_subprobe', 'mbr_get_id', 'is_empty_mbr', 'blkid_partition_get_type', 'blkid_probe_use_wiper', 'blkid_partition_get_size', 'blkid_probe_is_ntfs', 'blkid_partition_set_type', 'blkid_partition_set_flags', 'blkid_partlist_increment_partno', 'blkid_partlist_get_partition', 'blkid_partition_gen_uuid', 'blkid_probe_is_tiny', 'blkid_partlist_new_parttable', 'blkid_partitions_need_typeonly', 'dos_partition_get_start', 'is_extended', 'is_lvm', 'blkid_partitions_strcpy_ptuuid', 'blkid_partlist_numof_partitions', 'blkid_partition_is_extended', 'blkid_probe_get_partlist', 'blkid_parttable_set_id', 'blkid_partlist_set_partno']	779	893	probe_dos_pt	call site: 00000	/src/util-linux/libblkid/src/partitions/dos.c:223
282	366	12 : View List ['blkid_probe_set_magic', 'parse_extended', 'memcmp', '__bswap_32.2074', 'blkid_partlist_increment_partno', 'is_valid_partition', 'blkid_partitions_need_typeonly', 'blkid_partlist_new_parttable', 'is_valid_dimension', 'blkid_probe_get_partlist', 'parse_partition', 'is_id_common']	282	366	probe_atari_pt	call site: 00000	/src/util-linux/libblkid/src/partitions/atari.c:226
200	291	5 : View List ['blkid_probe_sprintf_version', 'blkid_probe_set_magic', '__bswap_64.926', 'blkid_probe_set_fsendianness', 'zfs_extract_guid_name']	200	291	probe_zfs	call site: 00000	/src/util-linux/libblkid/src/superblocks/zfs.c:305
175	175	1 : View List ['sync_opts_from_optlist']	276	353	mnt_fs_strdup_options	call site: 00237	/src/util-linux/libmount/src/fs.c:862
162	322	7 : View List ['blkid_probe_set_magic', '__uint32_identity.2953', 'raid1_verify_csum', 'blkid_probe_set_uuid_as', 'blkid_probe_set_uuid', '__uint64_identity.2954', 'blkid_probe_set_label']	162	322	probe_raid1	call site: 00000	/src/util-linux/libblkid/src/superblocks/linux_raid.c:221
94	108	3 : View List ['blkid_probe_get_hint', 'cdrom_size_correction', 'blkid_probe_set_hint']	114	473	blkid_probe_set_device	call site: 00838	/src/util-linux/libblkid/src/probe.c:1076
83	574	6 : View List ['blkid_probe_sprintf_version', 'blkid_probe_set_magic', '__bswap_32.2955', 'blkid_probe_set_uuid', 'blkid_probe_is_wholedisk', 'blkid_probe_is_covered_by_pt']	83	574	probe_raid0	call site: 00000	/src/util-linux/libblkid/src/superblocks/linux_raid.c:135
59	963	11 : View List ['closedir', 'malloc', 'probe_one', 'free', 'readdir', 'opendir', 'ul_debug.1839', 'lvm_get_devno', 'strlen', 'strcmp', 'getpid']	59	963	lvm_probe_all	call site: 00984	/src/util-linux/libblkid/src/devname.c:302
55	55	1 : View List ['blkid_probe_set_label']	55	389	ext_get_info	call site: 00000	/src/util-linux/libblkid/src/superblocks/ext.c:182
55	55	1 : View List ['blkid_probe_set_label']	55	259	probe_vfat	call site: 00000	/src/util-linux/libblkid/src/superblocks/vfat.c:430
43	43	1 : View List ['blkid_partitions_set_ptuuid']	43	43	probe_gpt_pt	call site: 00000	/src/util-linux/libblkid/src/partitions/gpt.c:348
38	38	4 : View List ['__errno_location', 'blkdev_find_size', 'fstat', 'ioctl']	38	38	blkdev_get_size	call site: 00736	/src/util-linux/lib/blkdev.c:103

Runtime coverage analysis

Covered functions

354

Functions that are reachable but not covered

157

Reachable functions

372

Percentage of reachable functions covered

57.8%

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
libmount/src/fuzz.c	1
libmount/src/tab.c	12
./include/debugobj.h	1
./include/c.h	2
libmount/src/tab_parse.c	19
libmount/src/fs.c	20
./include/strutils.h	5
lib/strutils.c	5
./include/debug.h	1
lib/mangle.c	3
libblkid/src/tag.c	10
libmount/src/utils.c	6
libmount/src/optstr.c	8
libmount/src/optmap.c	2
lib/buffer.c	7
lib/mbsalign.c	2
libmount/src/optlist.c	11
libmount/src/iter.c	1
./include/list.h	6
libmount/src/cache.c	10
lib/canonicalize.c	4
lib/sysfs.c	19
lib/path.c	24
./include/sysfs.h	2
libblkid/src/evaluate.c	4
libblkid/src/config.c	4
lib/env.c	1
libblkid/src/encode.c	7
./include/closestream.h	1
libblkid/src/cache.c	4
libblkid/src/read.c	10
libblkid/src/devname.c	10
libblkid/src/dev.c	2
libblkid/src/verify.c	2
./include/all-io.h	1
libblkid/src/probe.c	27
lib/blkdev.c	3
lib/fileutils.c	4
libblkid/src/devno.c	7
./include/fileutils.h	1
libblkid/src/superblocks/superblocks.c	3
libblkid/src/partitions/partitions.c	2
libblkid/src/resolve.c	1
libblkid/src/save.c	3

Fuzzer: test_fdisk_script_fuzz

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	160	27.1%
gold	[1:9]	5	0.84%
yellow	[10:29]	1	0.16%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	423	71.8%
All colors	589	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
261	261	1 : View List ['write_file_json']	261	261	fdisk_script_write_file	call site: 00393	/src/util-linux/libfdisk/src/script.c:749
15	15	3 : View List ['ul_debug.1700', 'blkid_get_library_version', 'getpid']	23	23	blkid_init_debug	call site: 00000	/src/util-linux/libblkid/src/init.c:55
2	2	1 : View List ['close']	4	132	reset_context	call site: 00568	/src/util-linux/libfdisk/src/context.c:539
0	20	1 : View List ['fdisk_script_free_header']	0	20	fdisk_script_set_header	call site: 00160	/src/util-linux/libfdisk/src/script.c:320
0	0	None	79	213	parse_line_header	call site: 00076	/src/util-linux/libfdisk/src/script.c:777
0	0	None	77	211	parse_line_header	call site: 00077	/src/util-linux/libfdisk/src/script.c:782
0	0	None	58	1023	parse_line_nameval	call site: 00175	/src/util-linux/libfdisk/src/script.c:1141
0	0	None	42	106	fdisk_script_set_header	call site: 00145	/src/util-linux/libfdisk/src/script.c:291
0	0	None	32	642	fdisk_script_read_line	call site: 00047	/src/util-linux/libfdisk/src/script.c:1406
0	0	None	30	68	fdisk_script_set_header	call site: 00146	/src/util-linux/libfdisk/src/script.c:298
0	0	None	24	812	parse_line_valcommas	call site: 00368	/src/util-linux/libfdisk/src/script.c:1250
0	0	None	22	39	parttype_from_data	call site: 00296	/src/util-linux/libfdisk/src/parttype.c:335

Runtime coverage analysis

Covered functions

105

Functions that are reachable but not covered

74

Reachable functions

175

Percentage of reachable functions covered

57.71%

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
libfdisk/src/script.c	28
lib/fileutils.c	1
./include/all-io.h	1
./include/c.h	1
libfdisk/src/context.c	6
./include/debugobj.h	1
libfdisk/src/gpt.c	1
libfdisk/src/dos.c	1
libfdisk/src/bsd.c	1
libfdisk/src/sgi.c	1
libfdisk/src/sun.c	1
./include/strutils.h	5
libfdisk/src/table.c	8
./include/list.h	5
lib/strutils.c	4
libfdisk/src/ask.c	11
libfdisk/src/partition.c	16
./include/debug.h	1
./include/mangle.h	1
lib/mangle.c	1
libfdisk/src/parttype.c	15
lib/jsonwrt.c	9
./include/cctype.h	2
libfdisk/src/iter.c	1
libfdisk/src/utils.c	1
lib/canonicalize.c	2
libfdisk/src/label.c	2
./include/carefulputc.h	1
libfdisk/src/alignment.c	1
libfdisk/src/wipe.c	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
probe_dos_pt	/src/util-linux/libblkid/src/partitions/dos.c	2	['struct.blkid_struct_probe.439 *', 'struct.blkid_idmag *']	6	0	668	127	43	127	0	660	545
dos_add_partition	/src/util-linux/libfdisk/src/dos.c	3	['struct.fdisk_context *', 'struct.fdisk_partition *', 'size_t *']	6	0	1410	279	91	110	0	630	488
mnt_table_is_fs_mounted	/src/util-linux/libmount/src/tab.c	2	['struct.libmnt_table *', 'struct.libmnt_fs *']	23	0	20	3	2	349	0	2303	452
fdisk_set_partition	/src/util-linux/libfdisk/src/partition.c	3	['struct.fdisk_context *', 'size_t ', 'struct.fdisk_partition *']	5	0	317	53	20	87	0	546	350
fdisk_apply_script	/src/util-linux/libfdisk/src/script.c	2	['struct.fdisk_context *', 'struct.fdisk_script *']	14	0	128	24	6	242	0	1192	307
gpt_add_partition	/src/util-linux/libfdisk/src/gpt.c	3	['struct.fdisk_context *', 'struct.fdisk_partition *', 'size_t *']	5	0	1273	217	66	129	0	587	234
probe_befs	/src/util-linux/libblkid/src/superblocks/befs.c	2	['struct.blkid_struct_probe.521 *', 'struct.blkid_idmag *']	4	0	364	61	24	52	0	321	189

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

Functions statically reachable by fuzzers

745/1858

Cyclomatic complexity statically reachable by fuzzers

5962 / 13541

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
probe_atari_pt	81	40	49.38%	[]
probe_bsd_pt	93	13	13.97%	[]
probe_dos_pt	113	44	38.93%	[]
probe_mac_pt	77	24	31.16%	[]
probe_minix_pt	52	14	26.92%	[]
probe_sgi_pt	45	17	37.77%	[]
probe_solaris_pt	58	20	34.48%	[]
probe_sun_pt	65	19	29.23%	[]
probe_ultrix_pt	43	21	48.83%	[]
read_buffer	32	17	53.12%	[]
blkdev_get_size	37	4	10.81%	['test_blkid_fuzz', 'test_mount_fuzz']
blkid_get_dev	80	42	52.5%	['test_mount_fuzz']
lvm_probe_all	53	7	13.20%	['test_mount_fuzz']
evaluate_by_udev	39	18	46.15%	['test_mount_fuzz']
blkid_partlist_devno_to_partition	59	26	44.06%	[]
blkid_flush_cache	106	53	50.0%	['test_mount_fuzz']
probe_ddf	45	19	42.22%	[]
probe_raid0	61	18	29.50%	[]
probe_pdcraid	33	9	27.27%	[]

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/util-linux/libblkid/src/superblocks/hpfs.c	[]	[]
/src/util-linux/libblkid/src/superblocks/promise_raid.c	[]	[]
/src/util-linux/libblkid/src/encode.c	['test_mount_fuzz']	['test_mount_fuzz']
/usr/include/x86_64-linux-gnu/bits/byteswap.h	[]	[]
/src/util-linux/lib/cpuset.c	[]	[]
/src/util-linux/lib/mangle.c	['test_mount_fuzz', 'test_fdisk_script_fuzz']	['test_mount_fuzz', 'test_fdisk_script_fuzz']
/src/util-linux/lib/strutils.c	['test_mount_fuzz', 'test_fdisk_script_fuzz']	['test_mount_fuzz', 'test_fdisk_script_fuzz']
/src/util-linux/libblkid/src/partitions/unixware.c	[]	[]
/src/util-linux/./include/debugobj.h	['test_blkid_fuzz', 'test_mount_fuzz', 'test_fdisk_script_fuzz']	[]
/src/util-linux/libblkid/src/partitions/partitions.c	['test_blkid_fuzz', 'test_mount_fuzz']	['test_blkid_fuzz', 'test_mount_fuzz']
/src/util-linux/libblkid/src/superblocks/udf.c	[]	[]
/src/util-linux/libblkid/src/config.c	['test_mount_fuzz']	['test_mount_fuzz']
/src/util-linux/libblkid/src/superblocks/vfat.c	[]	[]
/src/util-linux/./include/xalloc.h	['test_last_fuzz']	[]
/src/util-linux/libblkid/src/superblocks/zfs.c	[]	[]
/src/util-linux/libblkid/src/superblocks/ufs.c	[]	[]
/src/util-linux/libblkid/src/superblocks/zonefs.c	[]	[]
/src/util-linux/libblkid/src/superblocks/vxfs.c	[]	[]
/src/util-linux/libblkid/src/superblocks/jmicron_raid.c	[]	[]
/src/util-linux/libblkid/src/superblocks/erofs.c	[]	[]
/src/util-linux/libblkid/src/superblocks/gfs.c	[]	[]
/src/util-linux/libblkid/src/superblocks/romfs.c	[]	[]
/src/util-linux/libblkid/src/topology/topology.c	[]	[]
/src/util-linux/libblkid/src/superblocks/nvidia_raid.c	[]	[]
/src/util-linux/lib/loopdev.c	[]	[]
/src/util-linux/./include/partx.h	[]	[]
/src/util-linux/libuuid/src/pack.c	[]	[]
/src/util-linux/libfdisk/src/dos.c	['test_fdisk_script_fuzz']	['test_fdisk_script_fuzz']
/src/util-linux/libblkid/src/partitions/dos.c	[]	[]
/src/util-linux/libblkid/src/superblocks/iso9660.c	[]	[]
/src/util-linux/libmount/src/tab_parse.c	['test_mount_fuzz']	['test_mount_fuzz']
/src/util-linux/libblkid/src/superblocks/exfat.c	[]	[]
/src/util-linux/./include/cctype.h	['test_last_fuzz', 'test_fdisk_script_fuzz']	[]
/src/util-linux/lib/env.c	['test_mount_fuzz']	['test_mount_fuzz']
/src/util-linux/libblkid/src/version.c	[]	[]
/src/util-linux/libblkid/src/evaluate.c	['test_mount_fuzz']	['test_mount_fuzz']
/src/util-linux/libmount/src/btrfs.c	[]	[]
/src/util-linux/libblkid/src/superblocks/ntfs.c	[]	[]
/src/util-linux/libfdisk/src/init.c	[]	[]
/src/util-linux/libfdisk/src/partition.c	['test_fdisk_script_fuzz']	['test_fdisk_script_fuzz']
/src/util-linux/libblkid/src/superblocks/via_raid.c	[]	[]
/src/util-linux/libmount/src/fuzz.c	['test_mount_fuzz']	['test_mount_fuzz']
/src/util-linux/libblkid/src/superblocks/adaptec_raid.c	[]	[]
/src/util-linux/libfdisk/src/sgi.c	['test_fdisk_script_fuzz']	['test_fdisk_script_fuzz']
/src/util-linux/libblkid/src/topology/evms.c	[]	[]
/src/util-linux/./include/canonicalize.h	[]	[]
/src/util-linux/libblkid/src/superblocks/ddf_raid.c	[]	[]
/src/util-linux/libfdisk/src/context.c	['test_fdisk_script_fuzz']	['test_fdisk_script_fuzz']
/src/util-linux/libblkid/src/partitions/minix.c	[]	[]
/src/util-linux/libblkid/src/superblocks/nilfs.c	[]	[]
/src/util-linux/lib/sysfs.c	['test_blkid_fuzz', 'test_mount_fuzz']	['test_mount_fuzz']
/src/util-linux/lib/encode.c	[]	[]
/src/util-linux/libblkid/src/partitions/mac.c	[]	[]
/src/util-linux/libblkid/src/dev.c	['test_mount_fuzz']	['test_mount_fuzz']
/src/util-linux/libfdisk/src/sun.c	['test_fdisk_script_fuzz']	['test_fdisk_script_fuzz']
/src/util-linux/lib/linux_version.c	[]	[]
/src/util-linux/libblkid/src/cache.c	['test_mount_fuzz']	['test_mount_fuzz']
/src/util-linux/libblkid/src/superblocks/luks.c	[]	[]
/src/util-linux/libblkid/src/superblocks/lsi_raid.c	[]	[]
/src/util-linux/lib/sha256.c	[]	[]
/src/util-linux/libblkid/src/superblocks/minix.c	[]	[]
/src/util-linux/./include/all-io.h	['test_last_fuzz', 'test_blkid_fuzz', 'test_mount_fuzz', 'test_fdisk_script_fuzz']	[]
/src/util-linux/libfdisk/src/gpt.c	['test_fdisk_script_fuzz']	['test_fdisk_script_fuzz']
/src/util-linux/libblkid/src/superblocks/isw_raid.c	[]	[]
/src/util-linux/./include/pt-sgi.h	[]	[]
/src/util-linux/libmount/src/init.c	[]	[]
/src/util-linux/libblkid/src/superblocks/cramfs.c	[]	[]
/src/util-linux/libblkid/src/partitions/solaris_x86.c	[]	[]
/src/util-linux/libblkid/src/superblocks/drbdproxy_datalog.c	[]	[]
/src/util-linux/libblkid/src/superblocks/silicon_raid.c	[]	[]
/src/util-linux/libmount/src/iter.c	['test_mount_fuzz']	[]
/src/util-linux/libmount/src/optstr.c	['test_mount_fuzz']	['test_mount_fuzz']
/src/util-linux/libblkid/src/partitions/sun.c	[]	[]
/src/util-linux/libblkid/src/superblocks/jfs.c	[]	[]
/src/util-linux/libblkid/src/resolve.c	['test_mount_fuzz']	['test_mount_fuzz']
/src/util-linux/libblkid/src/superblocks/ubi.c	[]	[]
/src/util-linux/libblkid/src/superblocks/bitlocker.c	[]	[]
/src/util-linux/lib/md5.c	[]	[]
/src/util-linux/libfdisk/src/script.c	['test_fdisk_script_fuzz']	['test_fdisk_script_fuzz']
/src/util-linux/libfdisk/src/table.c	['test_fdisk_script_fuzz']	['test_fdisk_script_fuzz']
/src/util-linux/libblkid/src/partitions/gpt.c	[]	[]
/src/util-linux/libfdisk/src/item.c	[]	[]
/src/util-linux/libfdisk/src/version.c	[]	[]
/src/util-linux/libfdisk/src/alignment.c	['test_fdisk_script_fuzz']	['test_fdisk_script_fuzz']
/src/util-linux/libuuid/src/parse.c	[]	[]
/src/util-linux/libblkid/src/superblocks/squashfs.c	[]	[]
/src/util-linux/./include/closestream.h	['test_mount_fuzz']	[]
/src/util-linux/libblkid/src/superblocks/drbdmanage.c	[]	[]
/src/util-linux/libblkid/src/superblocks/sysv.c	[]	[]
/src/util-linux/libblkid/src/partitions/bsd.c	[]	[]
/src/util-linux/libuuid/src/unpack.c	[]	[]
/src/util-linux/lib/crc64.c	[]	[]
/src/util-linux/./include/xxhash.h	[]	[]
/src/util-linux/lib/crc32.c	[]	[]
/src/util-linux/libblkid/src/superblocks/apfs.c	[]	[]
/src/util-linux/libblkid/src/superblocks/xfs.c	[]	[]
/src/util-linux/libblkid/src/superblocks/f2fs.c	[]	[]
/src/util-linux/./include/sysfs.h	['test_blkid_fuzz', 'test_mount_fuzz']	[]
/src/util-linux/libfdisk/src/wipe.c	['test_fdisk_script_fuzz']	['test_fdisk_script_fuzz']
/src/util-linux/libblkid/src/probe.c	['test_blkid_fuzz', 'test_mount_fuzz']	['test_blkid_fuzz', 'test_mount_fuzz']
/src/util-linux/libblkid/src/save.c	['test_mount_fuzz']	['test_mount_fuzz']
/src/util-linux/./include/list.h	['test_blkid_fuzz', 'test_mount_fuzz', 'test_fdisk_script_fuzz']	[]
/src/util-linux/./include/c.h	['test_last_fuzz', 'test_blkid_fuzz', 'test_mount_fuzz', 'test_fdisk_script_fuzz']	[]
/src/util-linux/lib/match.c	[]	[]
/src/util-linux/libblkid/src/superblocks/vmfs.c	[]	[]
/src/util-linux/lib/sha1.c	[]	[]
/src/util-linux/libblkid/src/superblocks/befs.c	[]	[]
/src/util-linux/./include/pt-sun.h	[]	[]
/src/util-linux/lib/canonicalize.c	['test_mount_fuzz', 'test_fdisk_script_fuzz']	['test_mount_fuzz', 'test_fdisk_script_fuzz']
/src/util-linux/./include/carefulputc.h	['test_last_fuzz', 'test_fdisk_script_fuzz']	[]
/src/util-linux/libfdisk/src/ask.c	['test_fdisk_script_fuzz']	[]
/src/util-linux/libblkid/src/partitions/ultrix.c	[]	[]
/src/util-linux/libblkid/src/read.c	['test_mount_fuzz']	['test_mount_fuzz']
/src/util-linux/libuuid/src/unparse.c	[]	[]
/src/util-linux/libblkid/src/superblocks/highpoint_raid.c	[]	[]
/src/util-linux/libblkid/src/superblocks/bluestore.c	[]	[]
/src/util-linux/lib/jsonwrt.c	['test_fdisk_script_fuzz']	[]
/src/util-linux/libblkid/src/superblocks/btrfs.c	[]	[]
/src/util-linux/lib/mbsalign.c	['test_mount_fuzz']	[]
/src/util-linux/login-utils/last.c	['test_last_fuzz']	['test_last_fuzz']
/src/util-linux/libblkid/src/devname.c	['test_mount_fuzz']	['test_mount_fuzz']
/src/util-linux/./include/fileutils.h	['test_blkid_fuzz', 'test_mount_fuzz']	[]
/src/util-linux/libmount/src/version.c	[]	[]
/src/util-linux/./include/pt-mbr.h	[]	[]
/src/util-linux/libblkid/src/superblocks/cs_fvault2.c	[]	[]
/src/util-linux/libfdisk/src/label.c	['test_fdisk_script_fuzz']	['test_fdisk_script_fuzz']
/src/util-linux/libblkid/src/topology/lvm.c	[]	[]
/src/util-linux/./include/iso9660.h	[]	[]
/src/util-linux/libblkid/src/partitions/aix.c	[]	[]
/src/util-linux/libblkid/src/topology/ioctl.c	[]	[]
/src/util-linux/lib/crc32c.c	[]	[]
/src/util-linux/libfdisk/src/utils.c	['test_fdisk_script_fuzz']	['test_fdisk_script_fuzz']
/src/util-linux/libblkid/src/superblocks/superblocks.c	['test_blkid_fuzz', 'test_mount_fuzz']	['test_blkid_fuzz', 'test_mount_fuzz']
/src/util-linux/libblkid/src/init.c	[]	[]
/src/util-linux/lib/fileutils.c	['test_last_fuzz', 'test_blkid_fuzz', 'test_mount_fuzz', 'test_fdisk_script_fuzz']	['test_last_fuzz', 'test_mount_fuzz', 'test_fdisk_script_fuzz']
/src/util-linux/libmount/src/optmap.c	['test_mount_fuzz']	['test_mount_fuzz']
/src/util-linux/libmount/src/tab.c	['test_mount_fuzz']	['test_mount_fuzz']
/src/util-linux/libblkid/src/superblocks/ext.c	[]	[]
/src/util-linux/libblkid/src/devno.c	['test_blkid_fuzz', 'test_mount_fuzz']	['test_mount_fuzz']
/src/util-linux/libblkid/src/fuzz.c	['test_blkid_fuzz']	['test_blkid_fuzz']
/src/util-linux/./include/debug.h	['test_blkid_fuzz', 'test_mount_fuzz', 'test_fdisk_script_fuzz']	[]
/src/util-linux/libmount/src/utils.c	['test_mount_fuzz']	['test_mount_fuzz']
/src/util-linux/lib/path.c	['test_blkid_fuzz', 'test_mount_fuzz']	['test_mount_fuzz']
/src/util-linux/libblkid/src/topology/sysfs.c	[]	[]
/src/util-linux/lib/blkdev.c	['test_blkid_fuzz', 'test_mount_fuzz']	['test_mount_fuzz']
/src/util-linux/libblkid/src/topology/md.c	[]	[]
/usr/include/x86_64-linux-gnu/bits/uintn-identity.h	[]	[]
/src/util-linux/./include/strutils.h	['test_last_fuzz', 'test_blkid_fuzz', 'test_mount_fuzz', 'test_fdisk_script_fuzz']	[]
/src/util-linux/libmount/src/optlist.c	['test_mount_fuzz']	['test_mount_fuzz']
/src/util-linux/libblkid/src/superblocks/vdo.c	[]	[]
/src/util-linux/libblkid/src/partitions/atari.c	[]	[]
/src/util-linux/libblkid/src/superblocks/mpool.c	[]	[]
/src/util-linux/libfdisk/src/parttype.c	['test_fdisk_script_fuzz']	['test_fdisk_script_fuzz']
/src/util-linux/libblkid/src/superblocks/ubifs.c	[]	[]
/src/util-linux/libfdisk/src/iter.c	['test_fdisk_script_fuzz']	['test_fdisk_script_fuzz']
/src/util-linux/libblkid/src/superblocks/stratis.c	[]	[]
/src/util-linux/libblkid/src/verify.c	['test_mount_fuzz']	['test_mount_fuzz']
/src/util-linux/libblkid/src/superblocks/drbd.c	[]	[]
/src/util-linux/libblkid/src/superblocks/linux_raid.c	[]	[]
/src/util-linux/./include/env.h	[]	[]
/src/util-linux/libblkid/src/superblocks/lvm.c	[]	[]
/src/util-linux/libblkid/src/superblocks/ocfs.c	[]	[]
/src/util-linux/libmount/src/fs.c	['test_mount_fuzz']	['test_mount_fuzz']
/src/util-linux/libuuid/src/gen_uuid.c	[]	[]
/src/util-linux/./include/mangle.h	['test_fdisk_script_fuzz']	[]
/src/util-linux/libblkid/src/partitions/sgi.c	[]	[]
/src/util-linux/lib/randutils.c	[]	[]
/src/util-linux/libblkid/src/superblocks/netware.c	[]	[]
/src/util-linux/libblkid/src/tag.c	['test_blkid_fuzz', 'test_mount_fuzz']	['test_mount_fuzz']
/src/util-linux/libblkid/src/superblocks/bcache.c	[]	[]
/src/util-linux/libblkid/src/topology/dm.c	[]	[]
/src/util-linux/lib/timeutils.c	['test_last_fuzz']	[]
/src/util-linux/libblkid/src/superblocks/hfs.c	[]	[]
/src/util-linux/libblkid/src/superblocks/swap.c	[]	[]
/src/util-linux/libmount/src/cache.c	['test_mount_fuzz']	['test_mount_fuzz']
/src/util-linux/libblkid/src/superblocks/reiserfs.c	[]	[]
/src/util-linux/lib/buffer.c	['test_mount_fuzz']	['test_mount_fuzz']
/src/util-linux/libfdisk/src/bsd.c	['test_fdisk_script_fuzz']	['test_fdisk_script_fuzz']
/src/util-linux/libblkid/src/superblocks/exfs.c	[]	[]

Directories in report

Directory
/src/util-linux/./include/
/src/util-linux/libblkid/src/
/src/util-linux/libblkid/src/superblocks/
/src/util-linux/libfdisk/src/
/src/util-linux/libmount/src/
/src/util-linux/libblkid/src/partitions/
/src/util-linux/lib/
/usr/include/x86_64-linux-gnu/bits/
/src/util-linux/libuuid/src/
/src/util-linux/login-utils/
/src/util-linux/libblkid/src/topology/

This section shows a chosen list of functions / methods calls and their relative coverage information. By static analysis of the target project code, all of these function call and their caller information, including the source file or class and line number that initiate the call are captured. Column 1 is the function name of that selected functions or methods. Column 2 of each row indicate if the target function covered by any fuzzer calltree information. Column 3 lists all fuzzers (or no fuzzers at all) that have coered that particular function call dynamically. Column 4 shows list of parent function for the specific function call, while column 5 shows possible blocker functions that make the fuzzers fail to reach the specific functions. Both column 4 and 5 will only show information if none of the fuzzers cover the target function calls.

Function in each files in report

Target sink	Callsite location	Reached by fuzzer	Function call path	Covered by fuzzer	Possible branch blockers
execv	Not in fuzzer provided call tree	[]	Parent functions Callpaths probe_dm_tp in /src/util-linux/libblkid/src/topology/dm.c:90 Path 1 probe_lvm_tp in /src/util-linux/libblkid/src/topology/lvm.c:92 Path 1	0	Blocker function Arguments type Return type Constants touched probe_dm_tp in /src/util-linux/libblkid/src/topology/dm.c:31 ['struct.blkid_struct_probe.245 *', 'struct.blkid_idmag *'] int [] probe_lvm_tp in /src/util-linux/libblkid/src/topology/lvm.c:37 ['struct.blkid_struct_probe.271 *', 'struct.blkid_idmag *'] int []