High level conclusions

Fuzzers reach 99.36% of cyclomatic complexity.

Fuzzers reach 99.08% of all functions.

Fuzzers reach 78.65% code coverage.

Fuzzer fuzz_cups is blocked:

The runtime code coverage of fuzz_cups covers 29.76% of its statically reachable code. This means there is some place that blocks the fuzzer to continue exploring more code at run time.

Fuzzer fuzz_raster is blocked:

The runtime code coverage of fuzz_raster covers 22.22% 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

325 / 328

Cyclomatic complexity statically reachable by fuzzers

4213 / 4240

Runtime code coverage of functions

258 / 328

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_array

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	15	25.8%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	43	74.1%
All colors	58	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
4	19	cupsArrayAdd	call site: 00019	cups_array_find
3	14	LLVMFuzzerTestOneInput	call site: 00014	cupsArrayGetUserData
2	11	LLVMFuzzerTestOneInput	call site: 00011	printf
1	27	cupsArrayCurrent	call site: 00027	printf
1	33	cupsArrayGetLast	call site: 00033	printf
1	39	cupsArrayFind	call site: 00039	printf
1	41	LLVMFuzzerTestOneInput	call site: 00041	printf
1	49	LLVMFuzzerTestOneInput	call site: 00049	printf
1	56	LLVMFuzzerTestOneInput	call site: 00056	abort

Runtime coverage analysis

Covered functions

24

Functions that are reachable but not covered

9

Reachable functions

33

Percentage of reachable functions covered

72.73%

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.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
/src/cups/ossfuzz/fuzz_array.c	1
/src/cups/ossfuzz/fuzz_helpers.cpp	1
/src/cups/cups/array.c	22

Fuzzer: fuzz_raster

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	85	54.1%
gold	[1:9]	25	15.9%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	47	29.9%
All colors	157	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
52	15	cups_globals_init	call site: 00015	cupsFreeOptions
9	88	cupsCopyString	call site: 00088	validate_end
6	115	_cupsRasterNew	call site: 00115	cups_raster_io
5	123	cups_read_fd	call site: 00123	_cupsRasterNew
4	83	cups_globals_alloc	call site: 00083	cupsCopyString
3	99	_cupsRasterNew	call site: 00099	_cupsRasterAddError
3	149	cups_raster_update	call site: 00149	_cupsRasterAddError
1	104	_cupsRasterAddError	call site: 00104	realloc
1	106	_cupsRasterNew	call site: 00106	_cupsRasterAddError
1	133	cups_raster_read	call site: 00133	realloc

Runtime coverage analysis

Covered functions

18

Functions that are reachable but not covered

63

Reachable functions

81

Percentage of reachable functions covered

22.22%

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/cups/ossfuzz/fuzz_raster.c	2
/src/cups/cups/raster-stubs.c	5
/src/cups/cups/raster-stream.c	6
/src/cups/cups/raster-error.c	2
/src/cups/cups/globals.c	4
/src/cups/cups/string.c	3
/src/cups/cups/thread.c	2
/src/cups/cups/array.c	4
/src/cups/cups/http.c	2
/src/cups/cups/./tls-openssl.c	2
/src/cups/cups/http-addr.c	1
/src/cups/cups/http-addrlist.c	1
/usr/include/openssl/x509.h	1
/src/cups/cups/file.c	4
/src/cups/cups/options.c	1

Fuzzer: fuzz_cups

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	76	31.5%
gold	[1:9]	19	7.88%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	146	60.5%
All colors	241	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
52	9	cups_globals_init	call site: 00009	cupsFreeOptions
10	226	error_object	call site: 00226	_cupsRasterAddError
8	83	cupsCopyString	call site: 00083	snprintf
4	77	cups_globals_alloc	call site: 00077	cupsCopyString
1	3	_cupsRasterExecPS	call site: 00003	_cupsRasterAddError
1	97	new_stack	call site: 00097	_cupsRasterAddError

Runtime coverage analysis

Covered functions

25

Functions that are reachable but not covered

59

Reachable functions

84

Percentage of reachable functions covered

29.76%

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/cups/ossfuzz/fuzz_cups.c	1
/src/cups/cups/raster-interpret.c	13
/src/cups/cups/raster-error.c	1
/src/cups/cups/globals.c	4
/src/cups/cups/string.c	4
/src/cups/cups/thread.c	2
/src/cups/cups/array.c	4
/src/cups/cups/http.c	2
/src/cups/cups/./tls-openssl.c	2
/src/cups/cups/http-addr.c	1
/src/cups/cups/http-addrlist.c	1
/usr/include/openssl/x509.h	1
/src/cups/cups/file.c	4
/src/cups/cups/options.c	1
/src/cups/cups/../cups/string-private.h	4
/src/cups/cups/./string-private.h	2

Fuzzer: fuzz_http_core

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	311	64.5%
gold	[1:9]	37	7.67%
yellow	[10:29]	12	2.48%
greenyellow	[30:49]	4	0.82%
lawngreen	50+	118	24.4%
All colors	482	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
87	368	httpAddrLength	call site: 00368	_cupsSetError
60	192	_cupsSetError	call site: 00192	_cupsLangString
43	83	_cupsStrFree	call site: 00083	cupsFreeOptions
36	253	cupsArrayNew3	call site: 00253	cupsFileOpen
30	337	httpAddrGetList	call site: 00337	_cupsSetError
12	142	cups_globals_alloc	call site: 00142	cupsCopyString
9	313	httpAddrGetList	call site: 00313	_cupsSetError
5	182	httpAddrGetList	call site: 00182	_cupsSetError
4	26	httpAssembleURI	call site: 00026	strcmp
4	324	httpAddrGetList	call site: 00324	_cupsSetError
4	331	httpAddrGetList	call site: 00331	_cupsSetError
2	164	test_http_encoding_functions	call site: 00164	httpEncode64_3

Runtime coverage analysis

Covered functions

56

Functions that are reachable but not covered

119

Reachable functions

175

Percentage of reachable functions covered

32.0%

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/cups/ossfuzz/fuzz_http_core.c	8
/src/cups/cups/http.c	4
/src/cups/cups/globals.c	6
/src/cups/cups/thread.c	2
/src/cups/cups/./tls-openssl.c	3
/src/cups/cups/http-support.c	10
/src/cups/cups/./string-private.h	9
/src/cups/cups/string.c	7
/src/cups/cups/array.c	8
/src/cups/cups/http-addr.c	9
/src/cups/cups/http-addrlist.c	4
/usr/include/openssl/x509.h	1
/src/cups/cups/file.c	10
/src/cups/cups/options.c	1
/src/cups/cups/request.c	1
/src/cups/cups/language.c	14

Fuzzer: fuzz_ipp

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	397	59.7%
gold	[1:9]	98	14.7%
yellow	[10:29]	17	2.56%
greenyellow	[30:49]	2	0.30%
lawngreen	50+	150	22.5%
All colors	664	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
42	348	_cupsLangString	call site: 00348	_cupsSetError
36	248	_cupsSetError	call site: 00248	_cupsSetError
35	429	cups_set_server_name	call site: 00429	cups_set_ssl_options
30	398	_cupsSetDefaults	call site: 00398	cups_read_client_conf
28	52	cupsMutexUnlock	call site: 00052	cupsFileClose
26	319	cups_fill	call site: 00319	cupsFileGets
19	521	_cupsSetDefaults	call site: 00521	cupsArrayNewStrings
17	9	cupsFileOpen	call site: 00009	cups_open
14	548	_cupsSetDefaults	call site: 00548	_cups_strcasecmp
13	138	_cups_tolower	call site: 00138	_cupsSetError
12	111	cups_globals_alloc	call site: 00111	cupsCopyString
12	124	_cupsGlobals	call site: 00124	cupsCopyString

Runtime coverage analysis

Covered functions

62

Functions that are reachable but not covered

128

Reachable functions

190

Percentage of reachable functions covered

32.63%

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/cups/ossfuzz/fuzz_ipp.c	2
/src/cups/cups/file.c	12
/src/cups/cups/./string-private.h	7
/src/cups/cups/string.c	8
/src/cups/cups/http-addrlist.c	4
/src/cups/cups/globals.c	6
/src/cups/cups/thread.c	2
/src/cups/cups/array.c	13
/src/cups/cups/http.c	3
/src/cups/cups/./tls-openssl.c	3
/src/cups/cups/http-addr.c	5
/usr/include/openssl/x509.h	1
/src/cups/cups/options.c	1
/src/cups/cups/request.c	1
/src/cups/cups/language.c	14
/src/cups/cups/ipp.c	16
/src/cups/cups/usersys.c	16
/src/cups/cups/tls.c	1

Fuzzer: fuzz_ipp_gen

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	399	59.3%
gold	[1:9]	92	13.6%
yellow	[10:29]	17	2.52%
greenyellow	[30:49]	2	0.29%
lawngreen	50+	162	24.1%
All colors	672	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
42	344	_cupsLangString	call site: 00344	_cupsSetError
36	244	_cupsSetError	call site: 00244	_cupsSetError
35	435	cups_set_server_name	call site: 00435	cups_set_ssl_options
30	404	_cupsSetDefaults	call site: 00404	cups_read_client_conf
26	315	cups_fill	call site: 00315	cupsFileGets
19	48	cupsMutexUnlock	call site: 00048	cupsFileClose
19	527	_cupsSetDefaults	call site: 00527	cupsArrayNewStrings
14	554	_cupsSetDefaults	call site: 00554	_cups_strcasecmp
13	134	_cups_tolower	call site: 00134	_cupsSetError
12	107	cups_globals_alloc	call site: 00107	cupsCopyString
12	120	_cupsGlobals	call site: 00120	cupsCopyString
9	624	ipp_read_io	call site: 00624	ipp_add_attr

Runtime coverage analysis

Covered functions

64

Functions that are reachable but not covered

122

Reachable functions

186

Percentage of reachable functions covered

34.41%

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/cups/ossfuzz/fuzz_ipp_gen.c	1
/src/cups/cups/file.c	13
/src/cups/cups/./string-private.h	7
/src/cups/cups/string.c	8
/src/cups/cups/http-addrlist.c	4
/src/cups/cups/globals.c	6
/src/cups/cups/thread.c	2
/src/cups/cups/array.c	13
/src/cups/cups/http.c	3
/src/cups/cups/./tls-openssl.c	3
/src/cups/cups/http-addr.c	5
/usr/include/openssl/x509.h	1
/src/cups/cups/options.c	1
/src/cups/cups/request.c	1
/src/cups/cups/language.c	14
/src/cups/cups/ipp.c	16
/src/cups/cups/usersys.c	16
/src/cups/cups/tls.c	1

Fuzzer: fuzz_ppd_gen_conflicts

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	1010	58.6%
gold	[1:9]	22	1.27%
yellow	[10:29]	6	0.34%
greenyellow	[30:49]	3	0.17%
lawngreen	50+	680	39.5%
All colors	1721	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
321	1074	cupsMarkOptions	call site: 01074	ppd_mark_option
172	1421	ppd_mark_option	call site: 01421	ppd_mark_option
74	1643	LLVMFuzzerTestOneInput	call site: 01643	ppd_test_constraints
71	329	cups_fill	call site: 00329	_cupsSetError
49	97	cupsFileClose	call site: 00097	cupsFreeOptions
37	257	_cupsStrAlloc	call site: 00257	_cupsSetError
28	62	cupsMutexUnlock	call site: 00062	cupsFileClose
20	148	_cups_tolower	call site: 00148	_cupsSetError
17	19	cupsFileOpen	call site: 00019	cups_open
14	227	cupsArrayNew3	call site: 00227	cupsFileOpen
14	1406	ppd_mark_option	call site: 01406	ppdPageSize
13	213	cupsLangGet	call site: 00213	_cupsLangString

Runtime coverage analysis

Covered functions

101

Functions that are reachable but not covered

167

Reachable functions

268

Percentage of reachable functions covered

37.69%

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/cups/ossfuzz/fuzz_ppd_gen_conflicts.c	1
/src/cups/cups/ppd.c	27
/src/cups/cups/file.c	12
/src/cups/cups/./string-private.h	10
/src/cups/cups/string.c	11
/src/cups/cups/http-addrlist.c	4
/src/cups/cups/globals.c	6
/src/cups/cups/thread.c	2
/src/cups/cups/array.c	28
/src/cups/cups/http.c	3
/src/cups/cups/./tls-openssl.c	3
/src/cups/cups/http-addr.c	5
/usr/include/openssl/x509.h	1
/src/cups/cups/options.c	8
/src/cups/cups/request.c	1
/src/cups/cups/language.c	15
/src/cups/cups/transcode.c	2
/src/cups/cups/ppd-custom.c	2
/src/cups/cups/ppd-mark.c	9
/src/cups/cups/ppd-attr.c	2
/src/cups/cups/ppd-page.c	1
/src/cups/cups/ppd-cache.c	12
/src/cups/cups/ppd-conflicts.c	6
/src/cups/cups/pwg-media.c	13
/src/cups/cups/ipp.c	5

Fuzzer: fuzz_ppd_gen_1

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	853	51.9%
gold	[1:9]	15	0.91%
yellow	[10:29]	5	0.30%
greenyellow	[30:49]	7	0.42%
lawngreen	50+	763	46.4%
All colors	1643	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
342	1259	cupsMarkOptions	call site: 01259	ppd_mark_option
106	964	ppd_mark_option	call site: 00964	pwgInitSize
71	329	cups_fill	call site: 00329	_cupsSetError
41	105	cupsFreeOptions	call site: 00105	cups_globals_alloc
37	257	_cupsStrAlloc	call site: 00257	_cupsSetError
28	62	cupsMutexUnlock	call site: 00062	cupsFileClose
20	148	_cups_tolower	call site: 00148	_cupsSetError
17	19	cupsFileOpen	call site: 00019	cups_open
14	227	cupsArrayNew3	call site: 00227	cupsFileOpen
13	213	cupsLangGet	call site: 00213	_cupsLangString
13	478	cupsCharsetToUTF8	call site: 00478	_cupsCharmapFlush
10	1619	cupsMarkOptions	call site: 01619	ppd_mark_choices

Runtime coverage analysis

Covered functions

106

Functions that are reachable but not covered

158

Reachable functions

264

Percentage of reachable functions covered

40.15%

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/cups/ossfuzz/fuzz_ppd_gen_1.c	1
/src/cups/cups/ppd.c	27
/src/cups/cups/file.c	12
/src/cups/cups/./string-private.h	10
/src/cups/cups/string.c	11
/src/cups/cups/http-addrlist.c	4
/src/cups/cups/globals.c	6
/src/cups/cups/thread.c	2
/src/cups/cups/array.c	26
/src/cups/cups/http.c	3
/src/cups/cups/./tls-openssl.c	3
/src/cups/cups/http-addr.c	5
/usr/include/openssl/x509.h	1
/src/cups/cups/options.c	8
/src/cups/cups/request.c	1
/src/cups/cups/language.c	15
/src/cups/cups/transcode.c	2
/src/cups/cups/ppd-custom.c	2
/src/cups/cups/ppd-mark.c	10
/src/cups/cups/ppd-attr.c	2
/src/cups/cups/ppd-page.c	1
/src/cups/cups/ppd-cache.c	12
/src/cups/cups/ipp.c	5
/src/cups/cups/pwg-media.c	13
/src/cups/cups/ppd-conflicts.c	4

Fuzzer: fuzz_ppd_gen_cache

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	941	42.3%
gold	[1:9]	120	5.40%
yellow	[10:29]	26	1.17%
greenyellow	[30:49]	16	0.72%
lawngreen	50+	1118	50.3%
All colors	2221	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
44	2038	_cupsConvertOptions	call site: 02038	ippAddOctetString
42	368	_cupsLangString	call site: 00368	_cupsSetError
36	268	_cupsSetError	call site: 00268	_cupsSetError
35	1416	cups_set_server_name	call site: 01416	cups_set_ssl_options
32	1722	_cupsBufferGet	call site: 01722	ippWriteIO
26	339	cups_fill	call site: 00339	cupsFileGets
24	2083	_cupsConvertOptions	call site: 02083	ippAddInteger
21	2129	_cupsConvertOptions	call site: 02129	ippNew
20	1811	ipp_read_io	call site: 01811	ipp_set_value
19	72	cupsMutexUnlock	call site: 00072	cupsFileClose
19	1396	cupsFileGetConf	call site: 01396	cups_set_browse_domains
18	1179	_ppdCacheCreateWithPPD	call site: 01179	pwg_add_finishing

Runtime coverage analysis

Covered functions

178

Functions that are reachable but not covered

172

Reachable functions

350

Percentage of reachable functions covered

50.86%

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/cups/ossfuzz/fuzz_ppd_gen_cache.c	5
/src/cups/cups/ppd.c	27
/src/cups/cups/file.c	22
/src/cups/cups/./string-private.h	10
/src/cups/cups/string.c	11
/src/cups/cups/http-addrlist.c	4
/src/cups/cups/globals.c	6
/src/cups/cups/thread.c	2
/src/cups/cups/array.c	24
/src/cups/cups/http.c	3
/src/cups/cups/./tls-openssl.c	3
/src/cups/cups/http-addr.c	5
/usr/include/openssl/x509.h	1
/src/cups/cups/options.c	8
/src/cups/cups/request.c	1
/src/cups/cups/language.c	15
/src/cups/cups/transcode.c	2
/src/cups/cups/ppd-custom.c	2
/src/cups/cups/ppd-mark.c	4
/src/cups/cups/ppd-attr.c	2
/src/cups/cups/ppd-page.c	1
/src/cups/cups/ppd-cache.c	21
/src/cups/cups/pwg-media.c	13
/src/cups/cups/ipp.c	38
/src/cups/cups/usersys.c	16
/src/cups/cups/tls.c	1
/src/cups/cups/hash.c	2
/src/cups/cups/md5.c	4
/src/cups/cups/encode.c	2

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
_cupsGetPassword	/src/cups/cups/usersys.c	1	['N/A']	7	0	237	46	23	64	0	268	35

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

Functions statically reachable by fuzzers

327 / 328

Cyclomatic complexity statically reachable by fuzzers

4238 / 4240

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/cups/ossfuzz/fuzz_array.c

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=['cupsArrayAdd', 'LLVMFuzzerTestOneInput', 'cupsArrayCurrent', 'cupsArrayGetLast', 'cupsArrayFind']

/src/cups/ossfuzz/fuzz_raster.c

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=['cups_globals_init', 'cupsCopyString', '_cupsRasterNew', 'cups_read_fd', 'cups_globals_alloc', 'cups_raster_update', '_cupsRasterAddError', 'cups_raster_read']

/src/cups/ossfuzz/fuzz_cups.c

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=['cups_globals_init', 'error_object', 'cupsCopyString', 'cups_globals_alloc', '_cupsRasterExecPS', 'new_stack']

/src/cups/ossfuzz/fuzz_http_core.c

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=['httpAddrLength', '_cupsSetError', '_cupsStrFree', 'cupsArrayNew3', 'httpAddrGetList', 'cups_globals_alloc', 'httpAssembleURI']

/src/cups/ossfuzz/fuzz_ipp.c

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=['_cupsLangString', '_cupsSetError', 'cups_set_server_name', '_cupsSetDefaults', 'cupsMutexUnlock', 'cups_fill', 'cupsFileOpen', '_cups_tolower']

/src/cups/ossfuzz/fuzz_ipp_gen.c

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=['_cupsLangString', '_cupsSetError', 'cups_set_server_name', '_cupsSetDefaults', 'cups_fill', 'cupsMutexUnlock', '_cups_tolower', 'cups_globals_alloc']

/src/cups/ossfuzz/fuzz_ppd_gen_conflicts.c

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=['cupsMarkOptions', 'ppd_mark_option', 'LLVMFuzzerTestOneInput', 'cups_fill', 'cupsFileClose', '_cupsStrAlloc', 'cupsMutexUnlock', '_cups_tolower', 'cupsFileOpen', 'cupsArrayNew3']

/src/cups/ossfuzz/fuzz_ppd_gen_1.c

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=['cupsMarkOptions', 'ppd_mark_option', 'cups_fill', 'cupsFreeOptions', '_cupsStrAlloc', 'cupsMutexUnlock', '_cups_tolower', 'cupsFileOpen', 'cupsArrayNew3', 'cupsLangGet']

/src/cups/ossfuzz/fuzz_ppd_gen_cache.c

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=['_cupsConvertOptions', '_cupsLangString', '_cupsSetError', 'cups_set_server_name', '_cupsBufferGet', 'cups_fill', 'ipp_read_io', 'cupsMutexUnlock']

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
cups_globals_alloc	89	41	46.06%	['fuzz_raster', 'fuzz_ipp', 'fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_cache', 'fuzz_http_core', 'fuzz_ipp_gen', 'fuzz_ppd_gen_1', 'fuzz_cups']
_cupsRasterNew	81	44	54.32%	['fuzz_raster']
cupsFileOpen	66	35	53.03%	['fuzz_ipp', 'fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_cache', 'fuzz_http_core', 'fuzz_ipp_gen', 'fuzz_ppd_gen_1']
_cupsMessageLoad	75	18	24.0%	['fuzz_ipp', 'fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_cache', 'fuzz_http_core', 'fuzz_ipp_gen', 'fuzz_ppd_gen_1']
cupsSetServer	47	19	40.42%	['fuzz_ppd_gen_cache', 'fuzz_ipp', 'fuzz_ipp_gen']
_cupsSetDefaults	198	52	26.26%	['fuzz_ppd_gen_cache', 'fuzz_ipp', 'fuzz_ipp_gen']
cups_open	49	21	42.85%	['fuzz_ipp', 'fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_cache', 'fuzz_http_core', 'fuzz_ipp_gen', 'fuzz_ppd_gen_1']
cupsGetConflicts	35	18	51.42%	['fuzz_ppd_gen_conflicts']
cupsResolveConflicts	234	22	9.401%	['fuzz_ppd_gen_conflicts']
cupsMarkOptions	202	54	26.73%	['fuzz_ppd_gen_1', 'fuzz_ppd_gen_conflicts']
cupsCharsetToUTF8	66	34	51.51%	['fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache', 'fuzz_ppd_gen_conflicts']
cupsFilePrintf	58	29	50.0%	['fuzz_ppd_gen_cache']
cupsFilePuts	35	19	54.28%	['fuzz_ppd_gen_cache']
ippContainsString	48	9	18.75%	['fuzz_ppd_gen_cache']
ippFindNextAttribute	83	33	39.75%	['fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache', 'fuzz_ppd_gen_conflicts']
_cupsConvertOptions	290	88	30.34%	['fuzz_ppd_gen_cache']
_ppdCacheGetFinishingOptions	37	9	24.32%	['fuzz_ppd_gen_cache']
_ppdCacheGetFinishingValues	48	14	29.16%	['fuzz_ppd_gen_cache']
pwgInitSize	114	48	42.10%	['fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache', 'fuzz_ppd_gen_conflicts']

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/cups/cups/file.c	['fuzz_raster', 'fuzz_cups', 'fuzz_http_core', 'fuzz_ipp', 'fuzz_ipp_gen', 'fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']	['fuzz_ipp', 'fuzz_ipp_gen', 'fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']
/src/cups/cups/ppd-page.c	['fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']	['fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']
/src/cups/cups/./string-private.h	['fuzz_cups', 'fuzz_http_core', 'fuzz_ipp', 'fuzz_ipp_gen', 'fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']	[]
/src/cups/cups/ppd.c	['fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']	['fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']
/src/cups/cups/ppd-attr.c	['fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']	['fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']
/src/cups/cups/raster-error.c	['fuzz_raster', 'fuzz_cups']	['fuzz_raster', 'fuzz_cups']
/src/cups/cups/thread.c	['fuzz_raster', 'fuzz_cups', 'fuzz_http_core', 'fuzz_ipp', 'fuzz_ipp_gen', 'fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']	['fuzz_http_core', 'fuzz_ipp', 'fuzz_ipp_gen', 'fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']
/src/cups/ossfuzz/fuzz_raster.c	['fuzz_raster']	['fuzz_raster']
/src/cups/cups/string.c	['fuzz_raster', 'fuzz_cups', 'fuzz_http_core', 'fuzz_ipp', 'fuzz_ipp_gen', 'fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']	['fuzz_raster', 'fuzz_cups', 'fuzz_http_core', 'fuzz_ipp', 'fuzz_ipp_gen', 'fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']
/src/cups/cups/hash.c	['fuzz_ppd_gen_cache']	[]
/src/cups/cups/http-addrlist.c	['fuzz_raster', 'fuzz_cups', 'fuzz_http_core', 'fuzz_ipp', 'fuzz_ipp_gen', 'fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']	['fuzz_http_core']
/src/cups/cups/ipp.c	['fuzz_ipp', 'fuzz_ipp_gen', 'fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']	['fuzz_ipp', 'fuzz_ipp_gen', 'fuzz_ppd_gen_cache']
/src/cups/cups/encode.c	['fuzz_ppd_gen_cache']	[]
/src/cups/cups/http.c	['fuzz_raster', 'fuzz_cups', 'fuzz_http_core', 'fuzz_ipp', 'fuzz_ipp_gen', 'fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']	['fuzz_http_core']
/src/cups/cups/ppd-conflicts.c	['fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1']	['fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1']
/src/cups/cups/pwg-media.c	['fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']	['fuzz_ppd_gen_cache']
/src/cups/cups/md5.c	['fuzz_ppd_gen_cache']	[]
/src/cups/cups/request.c	['fuzz_http_core', 'fuzz_ipp', 'fuzz_ipp_gen', 'fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']	['fuzz_http_core', 'fuzz_ipp', 'fuzz_ipp_gen', 'fuzz_ppd_gen_cache']
/src/cups/ossfuzz/fuzz_ipp.c	['fuzz_ipp']	['fuzz_ipp']
/src/cups/cups/tls.c	['fuzz_ipp', 'fuzz_ipp_gen', 'fuzz_ppd_gen_cache']	['fuzz_ipp', 'fuzz_ipp_gen', 'fuzz_ppd_gen_cache']
/src/cups/ossfuzz/fuzz_cups.c	['fuzz_cups']	['fuzz_cups']
/src/cups/cups/raster-stream.c	['fuzz_raster']	['fuzz_raster']
/src/cups/cups/language.c	['fuzz_http_core', 'fuzz_ipp', 'fuzz_ipp_gen', 'fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']	['fuzz_ipp', 'fuzz_ipp_gen', 'fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']
/src/cups/cups/./tls-openssl.c	['fuzz_raster', 'fuzz_cups', 'fuzz_http_core', 'fuzz_ipp', 'fuzz_ipp_gen', 'fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']	[]
/src/cups/ossfuzz/fuzz_ipp_gen.c	['fuzz_ipp_gen']	['fuzz_ipp_gen']
/src/cups/cups/ppd-cache.c	['fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']	['fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/limits	[]	[]
/src/cups/cups/http-addr.c	['fuzz_raster', 'fuzz_cups', 'fuzz_http_core', 'fuzz_ipp', 'fuzz_ipp_gen', 'fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']	['fuzz_http_core']
/src/cups/ossfuzz/fuzz_helpers.cpp	['fuzz_array']	['fuzz_array']
/src/cups/ossfuzz/fuzz_ppd_gen_conflicts.c	['fuzz_ppd_gen_conflicts']	['fuzz_ppd_gen_conflicts']
/src/cups/cups/transcode.c	['fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']	['fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']
/src/cups/cups/globals.c	['fuzz_raster', 'fuzz_cups', 'fuzz_http_core', 'fuzz_ipp', 'fuzz_ipp_gen', 'fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']	['fuzz_raster', 'fuzz_cups', 'fuzz_http_core', 'fuzz_ipp', 'fuzz_ipp_gen', 'fuzz_ppd_gen_cache']
/src/cups/ossfuzz/fuzz_ppd_gen_cache.c	['fuzz_ppd_gen_cache']	['fuzz_ppd_gen_cache']
/src/cups/cups/options.c	['fuzz_raster', 'fuzz_cups', 'fuzz_http_core', 'fuzz_ipp', 'fuzz_ipp_gen', 'fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']	['fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']
/src/cups/cups/http-support.c	['fuzz_http_core']	['fuzz_http_core']
/src/cups/ossfuzz/fuzz_array.c	['fuzz_array']	['fuzz_array']
/src/cups/cups/ppd-custom.c	['fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']	['fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']
/src/cups/cups/array.c	['fuzz_array', 'fuzz_raster', 'fuzz_cups', 'fuzz_http_core', 'fuzz_ipp', 'fuzz_ipp_gen', 'fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']	['fuzz_array', 'fuzz_http_core', 'fuzz_ipp', 'fuzz_ipp_gen', 'fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']
/src/cups/cups/usersys.c	['fuzz_ipp', 'fuzz_ipp_gen', 'fuzz_ppd_gen_cache']	['fuzz_ipp', 'fuzz_ipp_gen', 'fuzz_ppd_gen_cache']
/src/cups/ossfuzz/fuzz_http_core.c	['fuzz_http_core']	['fuzz_http_core']
/src/cups/ossfuzz/fuzz_ppd_gen_1.c	['fuzz_ppd_gen_1']	['fuzz_ppd_gen_1']
/src/cups/cups/raster-stubs.c	['fuzz_raster']	['fuzz_raster']
/src/cups/cups/raster-interpret.c	['fuzz_cups']	['fuzz_cups']
/usr/include/openssl/x509.h	['fuzz_raster', 'fuzz_cups', 'fuzz_http_core', 'fuzz_ipp', 'fuzz_ipp_gen', 'fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']	[]
/src/cups/cups/ppd-mark.c	['fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']	['fuzz_ppd_gen_conflicts', 'fuzz_ppd_gen_1', 'fuzz_ppd_gen_cache']
/src/cups/cups/../cups/string-private.h	['fuzz_cups']	[]

Directories in report

Directory
/src/cups/ossfuzz/
/src/cups/cups/../cups/
/usr/include/openssl/
/src/cups/cups/
/src/cups/cups/./
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/