Fuzz blockers

The followings are the branches where fuzzer fails to bypass.

Unique Reachable Complexities	Unique Reachable Functions	All non-covered Complexity	All Reachable Complexity	Function Name	Function Callsite	Blocked Branch
40	2 : View List ['coap_get_log_level', 'coap_log_impl']	0	40	coap_pdu_resize	call site: 00052	/src/libcoap/src/coap_pdu.c:321
40	2 : View List ['coap_get_log_level', 'coap_log_impl']	0	40	coap_pdu_encode_header	call site: 00373	/src/libcoap/src/coap_pdu.c:1562
2	1 : View List ['coap_free_type']	0	2	coap_pdu_init	call site: 00020	/src/libcoap/src/coap_pdu.c:148
0	None	24	162	coap_show_pdu	call site: 00322	/src/libcoap/src/coap_debug.c:1055
0	None	8	48	coap_lock_lock_func	call site: 00391	/src/libcoap/src/coap_threadsafe.c:36
0	None	6	12	coap_cleanup	call site: 00410	/src/libcoap/src/coap_net.c:5076
0	None	2	2	coap_log_impl	call site: 00034	/src/libcoap/src/coap_debug.c:1307
0	None	2	2	coap_split_uri_sub	call site: 00179	/src/libcoap/src/coap_uri.c:128
0	None	2	2	coap_split_uri_sub	call site: 00182	/src/libcoap/src/coap_uri.c:134
0	None	2	2	coap_split_uri_sub	call site: 00185	/src/libcoap/src/coap_uri.c:140
0	None	2	2	coap_split_uri_sub	call site: 00188	/src/libcoap/src/coap_uri.c:146
0	None	2	2	coap_split_uri_sub	call site: 00192	/src/libcoap/src/coap_uri.c:152

Fuzzer calltree


         LLVMFuzzerTestOneInput

[function] [call site] 00000


           coap_startup

[function] [call site] 00001


             pthread_mutex_init

[call site] 00002


             pthread_mutex_init

[call site] 00003


             pthread_mutex_init

[call site] 00004


             pthread_mutex_init

[call site] 00005


             coap_clock_init

[function] [call site] 00006


               clock_gettime

[call site] 00007


             coap_ticks

[function] [call site] 00008


               clock_gettime

[call site] 00009


             coap_ticks_to_rt_us

[function] [call site] 00010


             coap_prng_init_lkd

[function] [call site] 00011


             coap_memory_init

[function] [call site] 00012


             coap_dtls_startup

[function] [call site] 00013


           coap_pdu_init

[function] [call site] 00014


             __assert_fail

[call site] 00015


             __assert_fail

[call site] 00016


             __assert_fail

[call site] 00017


             coap_malloc_type

[function] [call site] 00018


             coap_free_type

[function] [call site] 00019


             coap_malloc_type

[function] [call site] 00020


             coap_free_type

[function] [call site] 00021


             coap_pdu_clear

[function] [call site] 00022


               __assert_fail

[call site] 00023


               __assert_fail

[call site] 00024


               __assert_fail

[call site] 00025


           coap_set_log_level

[function] [call site] 00026


           coap_pdu_parse

[function] [call site] 00027


             coap_pdu_parse2

[function] [call site] 00028


               coap_pdu_parse_header_size

[function] [call site] 00029


                 __assert_fail

[call site] 00030


               coap_pdu_resize

[function] [call site] 00031


                 coap_get_log_level

[function] [call site] 00032


                 coap_log_impl

[function] [call site] 00033


                   pthread_mutex_lock

[call site] 00034


                   vsnprintf

[call site] 00035


                   coap_ticks

[function] [call site] 00036


                   print_timestamp

[function] [call site] 00037


                     coap_ticks_to_rt

[function] [call site] 00038


                     localtime

[call site] 00039


                     strftime

[call site] 00040


                     coap_ticks_to_rt_us

[function] [call site] 00041


                     snprintf

[call site] 00042


                   fprintf

[call site] 00043


                   fprintf

[call site] 00044


                   coap_log_level_desc

[function] [call site] 00045


                     snprintf

[call site] 00046


                   fprintf

[call site] 00047


                   vfprintf

[call site] 00048


                   fflush

[call site] 00049


                   pthread_mutex_unlock

[call site] 00050


                 __assert_fail

[call site] 00051


                 coap_realloc_type

[function] [call site] 00052


                   realloc

[call site] 00053


                 coap_get_log_level

[function] [call site] 00054


                 coap_log_impl

[function] [call site] 00055


               coap_pdu_parse_header

[function] [call site] 00056


                 __assert_fail

[call site] 00057


                 coap_get_log_level

[function] [call site] 00058


                 coap_log_impl

[function] [call site] 00059


                 __assert_fail

[call site] 00060


                 __assert_fail

[call site] 00061


                 coap_get_log_level

[function] [call site] 00062


                 coap_log_impl

[function] [call site] 00063


                 coap_get_log_level

[function] [call site] 00064


                 coap_log_impl

[function] [call site] 00065


               coap_pdu_parse_opt

[function] [call site] 00066


                 coap_option_filter_clear

[function] [call site] 00067


                 coap_get_log_level

[function] [call site] 00068


                 coap_log_impl

[function] [call site] 00069


                 coap_get_log_level

[function] [call site] 00070


                 coap_log_impl

[function] [call site] 00071


                 next_option_safe

[function] [call site] 00072


                   __assert_fail

[call site] 00073


                   __assert_fail

[call site] 00074


                   __assert_fail

[call site] 00075


                   coap_opt_parse

[function] [call site] 00076


                     __assert_fail

[call site] 00077


                     coap_get_log_level

[function] [call site] 00078


                     coap_log_impl

[function] [call site] 00079


                     coap_get_log_level

[function] [call site] 00080


                     coap_log_impl

[function] [call site] 00081


                     coap_get_log_level

[function] [call site] 00082


                     coap_log_impl

[function] [call site] 00083


                     coap_get_log_level

[function] [call site] 00084


                     coap_log_impl

[function] [call site] 00085


                     coap_get_log_level

[function] [call site] 00086


                     coap_log_impl

[function] [call site] 00087


                     coap_get_log_level

[function] [call site] 00088


                     coap_log_impl

[function] [call site] 00089


                     coap_get_log_level

[function] [call site] 00090


                     coap_log_impl

[function] [call site] 00091


                     coap_get_log_level

[function] [call site] 00092


                     coap_log_impl

[function] [call site] 00093


                     coap_get_log_level

[function] [call site] 00094


                     coap_log_impl

[function] [call site] 00095


                   __assert_fail

[call site] 00096


                 coap_opt_length

[function] [call site] 00097


                   coap_get_log_level

[function] [call site] 00098


                   coap_log_impl

[function] [call site] 00099


                   coap_get_log_level

[function] [call site] 00100


                   coap_log_impl

[function] [call site] 00101


                 coap_get_log_level

[function] [call site] 00102


                 coap_log_impl

[function] [call site] 00103


                 coap_option_filter_set

[function] [call site] 00104


                   coap_option_filter_op

[function] [call site] 00105


                     is_long_option

[function] [call site] 00106


                     coap_fls

[function] [call site] 00107


                       coap_flsll

[function] [call site] 00108


                     is_long_option

[function] [call site] 00109


                 coap_pdu_parse_opt_csm

[function] [call site] 00110


                 coap_pdu_parse_opt_base

[function] [call site] 00111


                 coap_get_log_level

[function] [call site] 00112


                 coap_log_impl

[function] [call site] 00113


                 coap_option_filter_set

[function] [call site] 00114


                 write_prefix

[function] [call site] 00115


                 next_option_safe

[function] [call site] 00116


                 coap_opt_length

[function] [call site] 00117


                 coap_pdu_parse_opt_csm

[function] [call site] 00118


                 coap_pdu_parse_opt_base

[function] [call site] 00119


                 write_prefix

[function] [call site] 00120


                 write_prefix

[function] [call site] 00121


                 write_char

[function] [call site] 00122


                   __ctype_b_loc

[call site] 00123


                 write_char

[function] [call site] 00124


                 coap_get_log_level

[function] [call site] 00125


                 coap_log_impl

[function] [call site] 00126


                 __assert_fail

[call site] 00127


                 coap_get_log_level

[function] [call site] 00128


                 coap_log_impl

[function] [call site] 00129


           coap_get_query

[function] [call site] 00130


             coap_option_filter_clear

[function] [call site] 00131


             coap_option_filter_set

[function] [call site] 00132


             coap_option_iterator_init

[function] [call site] 00133


               __assert_fail

[call site] 00134


               __assert_fail

[call site] 00135


               __assert_fail

[call site] 00136


             coap_option_next

[function] [call site] 00137


               __assert_fail

[call site] 00138


               opt_finished

[function] [call site] 00139


                 __assert_fail

[call site] 00140


               coap_opt_parse

[function] [call site] 00141


               __assert_fail

[call site] 00142


               coap_option_filter_get

[function] [call site] 00143


                 coap_option_filter_op

[function] [call site] 00144


             coap_opt_length

[function] [call site] 00145


             coap_opt_value

[function] [call site] 00146


               coap_get_log_level

[function] [call site] 00147


               coap_log_impl

[function] [call site] 00148


               coap_get_log_level

[function] [call site] 00149


               coap_log_impl

[function] [call site] 00150


             is_unescaped_in_query

[function] [call site] 00151


               is_unescaped_in_path

[function] [call site] 00152


             coap_new_string

[function] [call site] 00153


               __assert_fail

[call site] 00154


               coap_malloc_type

[function] [call site] 00155


               coap_get_log_level

[function] [call site] 00156


               coap_log_impl

[function] [call site] 00157


             coap_option_iterator_init

[function] [call site] 00158


             coap_option_next

[function] [call site] 00159


             coap_opt_length

[function] [call site] 00160


             coap_opt_value

[function] [call site] 00161


             is_unescaped_in_query

[function] [call site] 00162


           coap_get_uri_path

[function] [call site] 00163


             coap_check_option

[function] [call site] 00164


               coap_option_filter_clear

[function] [call site] 00165


               coap_option_filter_set

[function] [call site] 00166


               coap_option_iterator_init

[function] [call site] 00167


               coap_option_next

[function] [call site] 00168


             coap_opt_value

[function] [call site] 00169


             coap_opt_length

[function] [call site] 00170


             coap_split_proxy_uri

[function] [call site] 00171


               coap_split_uri_sub

[function] [call site] 00172


                 strlen

[call site] 00173


                 memcmp

[call site] 00174


                 coap_get_log_level

[function] [call site] 00175


                 coap_log_impl

[function] [call site] 00176


                 coap_get_log_level

[function] [call site] 00177


                 coap_log_impl

[function] [call site] 00178


                 coap_dtls_is_supported

[function] [call site] 00179


                 coap_get_log_level

[function] [call site] 00180


                 coap_log_impl

[function] [call site] 00181


                 coap_tcp_is_supported

[function] [call site] 00182


                 coap_get_log_level

[function] [call site] 00183


                 coap_log_impl

[function] [call site] 00184


                 coap_tls_is_supported

[function] [call site] 00185


                 coap_get_log_level

[function] [call site] 00186


                 coap_log_impl

[function] [call site] 00187


                 coap_ws_is_supported

[function] [call site] 00188


                   coap_tcp_is_supported

[function] [call site] 00189


                 coap_get_log_level

[function] [call site] 00190


                 coap_log_impl

[function] [call site] 00191


                 coap_wss_is_supported

[function] [call site] 00192


                   coap_tls_is_supported

[function] [call site] 00193


                 coap_get_log_level

[function] [call site] 00194


                 coap_log_impl

[function] [call site] 00195


                 coap_get_log_level

[function] [call site] 00196


                 coap_log_impl

[function] [call site] 00197


                 __ctype_b_loc

[call site] 00198


             coap_new_string

[function] [call site] 00199


             coap_option_filter_clear

[function] [call site] 00200


             coap_option_filter_set

[function] [call site] 00201


             coap_option_iterator_init

[function] [call site] 00202


             coap_option_next

[function] [call site] 00203


             coap_opt_length

[function] [call site] 00204


             coap_opt_value

[function] [call site] 00205


             is_unescaped_in_path

[function] [call site] 00206


             coap_new_string

[function] [call site] 00207


             coap_option_iterator_init

[function] [call site] 00208


             coap_option_next

[function] [call site] 00209


             coap_opt_length

[function] [call site] 00210


             coap_opt_value

[function] [call site] 00211


             is_unescaped_in_path

[function] [call site] 00212


           coap_show_pdu

[function] [call site] 00213


             coap_get_log_level

[function] [call site] 00214


             pthread_mutex_lock

[call site] 00215


             msg_type_string

[function] [call site] 00216


             msg_code_string

[function] [call site] 00217


               snprintf

[call site] 00218


             snprintf

[call site] 00219


             coap_get_log_level

[function] [call site] 00220


             coap_log_impl

[function] [call site] 00221


             msg_code_string

[function] [call site] 00222


             snprintf

[call site] 00223


             coap_get_log_level

[function] [call site] 00224


             coap_log_impl

[function] [call site] 00225


             msg_code_string

[function] [call site] 00226


             snprintf

[call site] 00227


             strlen

[call site] 00228


             snprintf

[call site] 00229


             strlen

[call site] 00230


             snprintf

[call site] 00231


             coap_option_iterator_init

[function] [call site] 00232


             strlen

[call site] 00233


             snprintf

[call site] 00234


             coap_option_next

[function] [call site] 00235


             strlen

[call site] 00236


             snprintf

[call site] 00237


             coap_opt_value

[function] [call site] 00238


             coap_opt_length

[function] [call site] 00239


             coap_decode_var_bytes

[function] [call site] 00240


             snprintf

[call site] 00241


             coap_opt_value

[function] [call site] 00242


             coap_opt_length

[function] [call site] 00243


             print_readable

[function] [call site] 00244


               __assert_fail

[call site] 00245


               __ctype_b_loc

[call site] 00246


             coap_opt_value

[function] [call site] 00247


             coap_opt_length

[function] [call site] 00248


             coap_decode_var_bytes

[function] [call site] 00249


             snprintf

[call site] 00250


             coap_opt_value

[function] [call site] 00251


             coap_opt_length

[function] [call site] 00252


             coap_decode_var_bytes

[function] [call site] 00253


             snprintf

[call site] 00254


             coap_opt_value

[function] [call site] 00255


             coap_opt_length

[function] [call site] 00256


             coap_decode_var_bytes

[function] [call site] 00257


             print_content_format

[function] [call site] 00258


               snprintf

[call site] 00259


               snprintf

[call site] 00260


             coap_opt_length

[function] [call site] 00261


             coap_opt_value

[function] [call site] 00262


             coap_get_data

[function] [call site] 00263


               coap_get_data_large

[function] [call site] 00264


                 __assert_fail

[call site] 00265


                 __assert_fail

[call site] 00266


                 __assert_fail

[call site] 00267


             coap_opt_block_num

[function] [call site] 00268


               coap_opt_length

[function] [call site] 00269


               coap_opt_value

[function] [call site] 00270


               coap_opt_length

[function] [call site] 00271


               coap_decode_var_bytes

[function] [call site] 00272


               coap_opt_length

[function] [call site] 00273


               coap_opt_value

[function] [call site] 00274


             coap_opt_length

[function] [call site] 00275


             coap_opt_value

[function] [call site] 00276


             snprintf

[call site] 00277


             coap_opt_block_num

[function] [call site] 00278


             coap_opt_length

[function] [call site] 00279


             coap_opt_value

[function] [call site] 00280


             snprintf

[call site] 00281


             coap_opt_block_num

[function] [call site] 00282


             coap_opt_length

[function] [call site] 00283


             coap_opt_value

[function] [call site] 00284


             coap_opt_length

[function] [call site] 00285


             coap_opt_value

[function] [call site] 00286


             snprintf

[call site] 00287


             coap_opt_length

[function] [call site] 00288


             coap_opt_value

[function] [call site] 00289


             snprintf

[call site] 00290


             strlen

[call site] 00291


             snprintf

[call site] 00292


             strlen

[call site] 00293


             snprintf

[call site] 00294


             strlen

[call site] 00295


             snprintf

[call site] 00296


             strlen

[call site] 00297


             snprintf

[call site] 00298


             strlen

[call site] 00299


             snprintf

[call site] 00300


             strlen

[call site] 00301


             snprintf

[call site] 00302


             strlen

[call site] 00303


             coap_opt_length

[function] [call site] 00304


             coap_opt_value

[function] [call site] 00305


             coap_opt_length

[function] [call site] 00306


             coap_decode_var_bytes

[function] [call site] 00307


             snprintf

[call site] 00308


             snprintf

[call site] 00309


             strlen

[call site] 00310


             snprintf

[call site] 00311


             strlen

[call site] 00312


             coap_opt_value

[function] [call site] 00313


             coap_opt_length

[function] [call site] 00314


             print_readable

[function] [call site] 00315


             strlen

[call site] 00316


             msg_option_string

[function] [call site] 00317


               snprintf

[call site] 00318


             snprintf

[call site] 00319


             strlen

[call site] 00320


             snprintf

[call site] 00321


             coap_get_data

[function] [call site] 00322


             strlen

[call site] 00323


             snprintf

[call site] 00324


             strlen

[call site] 00325


             snprintf

[call site] 00326


             fprintf

[call site] 00327


             coap_get_log_level

[function] [call site] 00328


             coap_log_impl

[function] [call site] 00329


             pthread_mutex_unlock

[call site] 00330


             strlen

[call site] 00331


             snprintf

[call site] 00332


             is_binary

[function] [call site] 00333


             __ctype_b_loc

[call site] 00334


             strlen

[call site] 00335


             snprintf

[call site] 00336


             fprintf

[call site] 00337


             coap_get_log_level

[function] [call site] 00338


             coap_log_impl

[function] [call site] 00339


             snprintf

[call site] 00340


             strlen

[call site] 00341


             snprintf

[call site] 00342


             strlen

[call site] 00343


             snprintf

[call site] 00344


             strlen

[call site] 00345


             snprintf

[call site] 00346


             fprintf

[call site] 00347


             coap_get_log_level

[function] [call site] 00348


             coap_log_impl

[function] [call site] 00349


             snprintf

[call site] 00350


             strlen

[call site] 00351


             __ctype_b_loc

[call site] 00352


             snprintf

[call site] 00353


             strlen

[call site] 00354


             snprintf

[call site] 00355


             strlen

[call site] 00356


             print_readable

[function] [call site] 00357


             strlen

[call site] 00358


             snprintf

[call site] 00359


             fprintf

[call site] 00360


             coap_get_log_level

[function] [call site] 00361


             coap_log_impl

[function] [call site] 00362


             pthread_mutex_unlock

[call site] 00363


           coap_pdu_encode_header

[function] [call site] 00364


             coap_get_log_level

[function] [call site] 00365


             coap_log_impl

[function] [call site] 00366


             __assert_fail

[call site] 00367


             coap_get_log_level

[function] [call site] 00368


             coap_log_impl

[function] [call site] 00369


             __assert_fail

[call site] 00370


             coap_get_log_level

[function] [call site] 00371


             coap_log_impl

[function] [call site] 00372


             __assert_fail

[call site] 00373


             coap_get_log_level

[function] [call site] 00374


             coap_log_impl

[function] [call site] 00375


             __assert_fail

[call site] 00376


             coap_get_log_level

[function] [call site] 00377


             coap_log_impl

[function] [call site] 00378


             __assert_fail

[call site] 00379


             coap_get_log_level

[function] [call site] 00380


             coap_log_impl

[function] [call site] 00381


             __assert_fail

[call site] 00382


             coap_get_log_level

[function] [call site] 00383


             coap_log_impl

[function] [call site] 00384


             coap_get_log_level

[function] [call site] 00385


             coap_log_impl

[function] [call site] 00386


           coap_delete_string

[function] [call site] 00387


             coap_free_type

[function] [call site] 00388


           coap_delete_string

[function] [call site] 00389


           coap_delete_pdu

[function] [call site] 00390


             coap_lock_lock_func

[function] [call site] 00391


               pthread_mutex_trylock

[call site] 00392


               pthread_self

[call site] 00393


               coap_get_log_level

[function] [call site] 00394


               coap_log_impl

[function] [call site] 00395


               __assert_fail

[call site] 00396


               pthread_mutex_lock

[call site] 00397


               __assert_fail

[call site] 00398


               pthread_self

[call site] 00399


             coap_delete_pdu_lkd

[function] [call site] 00400


               coap_free_type

[function] [call site] 00401


               coap_delete_binary

[function] [call site] 00402


                 coap_free_type

[function] [call site] 00403


               coap_free_type

[function] [call site] 00404


             coap_lock_unlock_func

[function] [call site] 00405


               pthread_self

[call site] 00406


               __assert_fail

[call site] 00407


               __assert_fail

[call site] 00408


               pthread_mutex_unlock

[call site] 00409


           coap_cleanup

[function] [call site] 00410


             coap_dtls_shutdown

[function] [call site] 00411


               coap_dtls_set_log_level

[function] [call site] 00412


             pthread_mutex_destroy

[call site] 00413


             pthread_mutex_destroy

[call site] 00414


             pthread_mutex_destroy

[call site] 00415


             coap_debug_reset

[function] [call site] 00416