Fuzz introspector
For issues and ideas: https://github.com/ossf/fuzz-introspector/issues

Fuzzer details

Fuzzer: fuzz_uri

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 4 10.5%
gold [1:9] 9 23.6%
yellow [10:29] 3 7.89%
greenyellow [30:49] 1 2.63%
lawngreen 50+ 21 55.2%
All colors 38 100

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
4 4 2 :

['pthread_mutexattr_init', 'pthread_mutexattr_destroy']

6 6 pthread_mutex_init call site: 00000 /src/kamailio/src/main.c:3135
0 0 None 741 759 parse_uri call site: 00001 /src/kamailio/./src/core/parser/../parser/parse_uri.c:505
0 0 None 741 759 parse_uri call site: 00004 /src/kamailio/./src/core/parser/../parser/parse_uri.c:1079
0 0 None 741 759 parse_uri call site: 00004 /src/kamailio/./src/core/parser/../parser/parse_uri.c:1087
0 0 None 8 8 pthread_mutex_init call site: 00000 /src/kamailio/src/main.c:3130

Runtime coverage analysis

Covered functions
7
Functions that are reachable but not covered
8
Reachable functions
14
Percentage of reachable functions covered
42.86%
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
./misc/fuzz/fuzz_uri.c 1
./src/core/parser/../parser/parse_uri.c 2
src/core/dprint.c 1
src/core/pt.c 1
./src/core/parser/../ut.h 1

Fuzzer: fuzz_parse_msg

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 0 470 34.2%
gold [1:9] 39 2.84%
yellow [10:29] 71 5.17%
greenyellow [30:49] 87 6.33%
lawngreen 50+ 706 51.4%
All colors 1373 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
2223 2277 5 :

['my_pid', 'dprint_color_reset', 'get_debug_level', 'dprint_color', 'get_debug_facility']

2223 2277 parse_identityinfo call site: 01261 /src/kamailio/src/core/parser/parse_identityinfo.c:174
1410 2204 3 :

['free_sdp', 'parse_sdp_session', 'new_sdp']

2892 3722 parse_sdp call site: 00647 /src/kamailio/src/core/parser/sdp/sdp.c:866
741 759 5 :

['my_pid', 'dprint_color_reset', 'get_debug_level', 'dprint_color', 'get_debug_facility']

741 759 get_src_uri call site: 01327 /src/kamailio/src/core/parser/msg_parser.c:1238
741 759 5 :

['dprint_color_reset', 'my_pid', 'get_debug_level', 'dprint_color', 'get_debug_facility']

741 759 parse_content_disposition call site: 01230 /src/kamailio/src/core/parser/parse_disposition.c:398
741 759 5 :

['dprint_color_reset', 'my_pid', 'get_debug_level', 'dprint_color', 'get_debug_facility']

741 759 parse_identityinfo_header call site: 01255 /src/kamailio/src/core/parser/parse_identityinfo.c:339
741 759 5 :

['my_pid', 'dprint_color_reset', 'get_debug_level', 'dprint_color', 'get_debug_facility']

741 759 parse_pai_ppi_body call site: 01203 /src/kamailio/src/core/parser/parse_ppi_pai.c:104
741 759 5 :

['my_pid', 'dprint_color_reset', 'get_debug_level', 'dprint_color', 'get_debug_facility']

741 759 new_sdp call site: 00668 /src/kamailio/src/core/parser/sdp/sdp.c:49
741 759 5 :

['my_pid', 'dprint_color_reset', 'get_debug_level', 'dprint_color', 'get_debug_facility']

741 759 int2strbuf call site: 01328 /src/kamailio/src/core/ut.h:306
391 391 1 :

['free_lump_list']

400 402 free_sip_msg call site: 01362 /src/kamailio/src/core/parser/msg_parser.c:823
4 4 2 :

['pthread_mutexattr_init', 'pthread_mutexattr_destroy']

6 6 pthread_mutex_init call site: 00000 /src/kamailio/src/main.c:3135
2 815 3 :

['strlen', 'ip_addr2a', 'int2str']

743 1574 get_src_address_socket call site: 01339 /src/kamailio/src/core/parser/msg_parser.c:1289
0 0 None 42237 43897 parse_via call site: 00182 /src/kamailio/src/core/parser/parse_via.c:2071

Runtime coverage analysis

Covered functions
115
Functions that are reachable but not covered
64
Reachable functions
176
Percentage of reachable functions covered
63.64%
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
./misc/fuzz/fuzz_parse_msg.c 1
src/core/parser/msg_parser.c 17
src/core/parser/parse_fline.c 1
src/core/dprint.c 1
src/core/pt.c 1
src/core/parser/parser_f.h 6
src/core/parser/parser_f.c 1
src/core/parser/../ut.h 4
src/core/parser/parse_hname2.c 2
src/core/parser/parse_via.c 4
src/core/parser/parse_cseq.c 2
src/core/parser/parse_methods.c 1
src/core/parser/parse_to.c 3
src/core/parser/parse_addr_spec.c 4
src/core/parser/parse_content.c 3
src/core/parser/parse_retry_after.c 1
src/core/events.c 1
src/core/parser/hf.c 3
src/core/parser/parse_allow.c 2
src/core/parser/digest/digest.c 1
src/core/parser/contact/parse_contact.c 4
src/core/parser/contact/contact.c 4
src/core/parser/parse_param.c 13
src/core/parser/parse_disposition.c 3
src/core/parser/parse_date.c 1
src/core/parser/parse_event.c 1
src/core/parser/parse_expires.c 1
src/core/parser/parse_identityinfo.c 3
src/core/parser/parse_identity.c 1
src/core/parser/parse_ppi_pai.c 3
src/core/parser/parse_rr.c 6
src/core/parser/parse_sipifmatch.c 1
src/core/parser/parse_subscription_state.c 1
src/core/parser/sdp/sdp.c 12
src/core/parser/sdp/sdp_helpr_funcs.c 25
src/core/ut.c 2
src/core/parser/sdp/../parser_f.h 3
src/core/parser/parse_from.c 2
./src/core/parser/../parser/parse_uri.c 2
./src/core/parser/../ut.h 1
src/core/parser/contact/../../trim.h 3
src/core/parser/../trim.h 1
src/core/parser/parse_refer_to.c 1
src/core/parser/parse_diversion.c 1
src/core/parser/parse_privacy.c 2
src/core/parser/parse_nameaddr.c 1
src/core/ip_addr.c 5
src/core/mem/shm.c 1
src/core/data_lump.c 2
src/core/data_lump_rpl.c 1

Analyses and suggestions

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
fix_actions /src/kamailio/src/core/route.c 1 ['struct.action *'] 20 0 14247 2209 714 513 11 22539 18432
tcp_init_children /src/kamailio/src/core/tcp_main.c 1 ['int *'] 23 0 1638 274 89 654 2 23057 4197
shm_init_manager /src/kamailio/src/core/mem/shm.c 1 ['char *'] 8 0 118 29 11 183 3 2921 2500
print_action /src/kamailio/src/core/route_struct.c 1 ['struct.action *'] 4 0 15269 2447 766 15 6 2598 2179
pp_substdef_add /src/kamailio/src/core/ppcfg.c 2 ['char *', 'int '] 11 0 2764 451 149 160 2 5950 2175
cfg_del_delayed /src/kamailio/src/core/cfg/cfg_ctx.c 4 ['struct._cfg_ctx *', 'struct._str *', 'int *', 'struct._str *'] 5 0 28 3 2 44 0 1576 1169
handle_tcpconn_ev /src/kamailio/src/core/tcp_main.c 3 ['struct.tcp_connection *', 'N/A', 'int '] 23 0 3223 500 166 565 0 22640 1150

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

Functions statically reachable by fuzzers
39.0%
934 / 2423
Cyclomatic complexity statically reachable by fuzzers
56.0%
37798 / 68048

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

Files and Directories in report

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/kamailio/src/core/dst_blocklist.c [] []
/src/kamailio/src/core/parser/parse_date.c ['fuzz_parse_msg'] []
/src/kamailio/src/core/raw_sock.c [] []
/src/kamailio/src/core/error.c [] []
/src/kamailio/src/core/kemi.c [] []
/src/kamailio/src/core/parser/parse_subscription_state.c ['fuzz_parse_msg'] []
/src/kamailio/src/core/modparam.c [] []
/src/kamailio/src/core/tcp_read.c [] []
/src/kamailio/src/core/crypto/../ut.h [] []
/src/kamailio/src/core/select_core.c [] []
/src/kamailio/src/core/async_task.c [] []
/src/kamailio/./misc/fuzz/fuzz_uri.c ['fuzz_uri'] []
/src/kamailio/src/core/dprint.c ['fuzz_uri', 'fuzz_parse_msg'] ['fuzz_uri', 'fuzz_parse_msg']
/src/kamailio/src/core/parser/parse_fline.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/sock_ut.c [] []
/src/kamailio/src/core/pt.c ['fuzz_uri', 'fuzz_parse_msg'] []
/src/kamailio/src/core/sr_module.c [] []
/src/kamailio/src/core/timer_proc.c [] []
/src/kamailio/src/core/pass_fd.c [] []
/src/kamailio/src/core/mod_fix.c [] []
/src/kamailio/src/core/msg_translator.c [] []
/src/kamailio/src/core/parser/parse_param.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/mem/f_malloc.c [] []
/src/kamailio/src/core/parser/parser_f.h ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/tcp_options.c [] []
/src/kamailio/src/core/parser/parse_nameaddr.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/cfg/cfg_struct.h [] []
/src/kamailio/src/core/tsend.c [] []
/src/kamailio/src/core/events.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/cfg/cfg.c [] []
/src/kamailio/src/core/parser/parse_rpid.c [] []
/src/kamailio/src/core/cfg/../bit_test.h [] []
/src/kamailio/src/core/parser/contact/parse_contact.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/srapi.c [] []
/src/kamailio/src/core/parser/../ip_addr.h [] []
/src/kamailio/src/core/route_struct.c [] []
/src/kamailio/src/core/proxy.h [] []
/src/kamailio/src/core/timer_funcs.h [] []
/src/kamailio/src/core/counters.c [] []
/src/kamailio/src/core/crypto/md5.h [] []
/src/kamailio/src/core/stun.c [] []
/src/kamailio/src/core/data_lump_rpl.h [] []
/src/kamailio/src/core/sctp_core.c [] []
/src/kamailio/src/core/ut.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/resolve.h [] []
/src/kamailio/src/core/locking.c [] []
/src/kamailio/src/core/lock_ops.c [] []
/src/kamailio/src/core/parser/parse_to.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/hashes.h [] []
/src/kamailio/src/core/cfg/cfg_struct.c [] []
/src/kamailio/src/core/basex.h [] []
/src/kamailio/src/core/parser/parse_event.c ['fuzz_parse_msg'] []
/src/kamailio/src/core/cfg.lex [] []
/src/kamailio/src/core/proxy.c [] []
/src/kamailio/src/core/route.c [] []
/src/kamailio/src/core/parser/parse_retry_after.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/endianness.c [] []
/src/kamailio/src/core/parser/contact/contact.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/cfg/../bit_scan.h [] []
/src/kamailio/src/core/usr_avp.c [] []
/src/kamailio/src/core/parser/parse_from.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/resolve.c [] []
/src/kamailio/src/core/str_list.c [] []
/src/kamailio/src/core/socket_info.c [] []
/src/kamailio/src/core/crypto/sha256.c [] []
/src/kamailio/src/core/parser/sdp/sdp.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/parser/msg_parser.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/pvapi.c [] []
/src/kamailio/src/core/flags.c [] []
/src/kamailio/src/core/parser/parse_disposition.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/udp_server.c [] []
/src/kamailio/src/core/ut.h [] []
/src/kamailio/src/core/forward.c [] []
/src/kamailio/src/core/cfg/cfg_select.c [] []
/src/kamailio/./src/core/parser/../parser/parse_uri.c ['fuzz_uri', 'fuzz_parse_msg'] []
/src/kamailio/src/core/re.c [] []
/src/kamailio/src/core/parser/parse_diversion.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/cfg/../atomic/atomic_x86.h [] []
/src/kamailio/src/core/dns_cache.c [] []
/src/kamailio/src/core/parser/parse_identityinfo.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/parser/parse_ppi_pai.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/dns_cache.h [] []
/src/kamailio/src/core/cfg/cfg_ctx.c [] []
/src/kamailio/src/core/receive.c [] []
/src/kamailio/src/core/parser/parse_content.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/qvalue.h [] []
/src/kamailio/src/core/parser/parse_methods.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/forward.h [] []
/src/kamailio/src/core/mem/pkg.c [] []
/src/kamailio/src/core/counters.h [] []
/src/kamailio/src/core/script_cb.c [] []
/src/kamailio/src/core/ip_addr.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/parser/parse_rr.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/parser/parse_hname2.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/onsend.c [] []
/src/kamailio/src/core/cfg/cfg_script.c [] []
/src/kamailio/src/main.c [] []
/src/kamailio/src/core/data_lump.c ['fuzz_parse_msg'] []
/src/kamailio/src/core/char_msg_val.h [] []
/src/kamailio/src/core/basex.c [] []
/src/kamailio/src/core/str_hash.h [] []
/src/kamailio/src/core/strutils.c [] []
/src/kamailio/src/core/parser/parse_expires.c ['fuzz_parse_msg'] []
/src/kamailio/src/core/dset.c [] []
/src/kamailio/src/core/parser/parse_cseq.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/parser/parse_addr_spec.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/timer.c [] []
/src/kamailio/src/core/rand/fastrand.c [] []
/src/kamailio/src/core/atomic_ops.c [] []
/src/kamailio/src/core/io_wait.h [] []
/src/kamailio/src/core/parser/../ut.h ['fuzz_parse_msg'] []
/src/kamailio/./misc/fuzz/fuzz_parse_msg.c ['fuzz_parse_msg'] []
/src/kamailio/src/core/socket_info.h [] []
/src/kamailio/src/core/atomic/atomic_common.h [] []
/src/kamailio/src/core/parser/parse_sipifmatch.c ['fuzz_parse_msg'] []
/src/kamailio/src/core/mem/tlsf_malloc.c [] []
/src/kamailio/src/core/fmsg.c [] []
/src/kamailio/src/core/parser/parse_privacy.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/parser/sdp/sdp_helpr_funcs.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/crypto/md5.c [] []
/src/kamailio/src/core/data_lump_rpl.c ['fuzz_parse_msg'] []
/src/kamailio/src/core/mem/tlsf_malloc_bits.h [] []
/src/kamailio/src/core/rpc_lookup.c [] []
/src/kamailio/src/core/name_alias.h [] []
/src/kamailio/src/core/atomic/atomic_x86.h [] []
/src/kamailio/src/core/tcp_main.c [] []
/src/kamailio/src/core/tcp_stats.c [] []
/src/kamailio/src/core/pv_core.c [] []
/src/kamailio/src/core/rand/isaac/rand.c [] []
/src/kamailio/src/core/rvalue.c [] []
/src/kamailio/src/core/xavp.c [] []
/src/kamailio/src/core/select_buf.c [] []
/src/kamailio/src/core/tls_hooks.c [] []
/src/kamailio/src/core/local_timer.c [] []
/src/kamailio/src/core/parser/parse_allow.c ['fuzz_parse_msg'] []
/src/kamailio/src/core/rand/fortuna/random.c [] []
/src/kamailio/src/core/mem/../bit_scan.h [] []
/src/kamailio/src/core/parser/hf.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/shm_init.c [] []
/src/kamailio/src/core/futexlock.h [] []
/src/kamailio/src/core/parser/parse_identity.c ['fuzz_parse_msg'] []
/src/kamailio/src/core/parser/contact/../../trim.h ['fuzz_parse_msg'] []
/src/kamailio/src/core/parser/digest/digest_parser.c [] []
/src/kamailio/src/core/utils/snexpr.h [] []
/src/kamailio/src/core/mem/shm.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/mem/q_malloc.c [] []
/src/kamailio/src/core/dns_func.c [] []
/src/kamailio/src/core/switch.c [] []
/src/kamailio/src/core/ip_addr.h [] []
/src/kamailio/src/core/parser/digest/digest.c ['fuzz_parse_msg'] []
/src/kamailio/src/core/nonsip_hooks.c [] []
/src/kamailio/src/core/ppcfg.c [] []
/src/kamailio/src/core/parser/parse_refer_to.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/parser/parse_via.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/parser/sdp/../parser_f.h ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/rand/cryptorand.c [] []
/src/kamailio/src/core/lvalue.c [] []
/src/kamailio/src/core/crypto/md5utils.c [] []
/src/kamailio/src/core/parser/parser_f.c ['fuzz_parse_msg'] ['fuzz_parse_msg']
/src/kamailio/src/core/parser/../trim.h ['fuzz_parse_msg'] []
/src/kamailio/src/core/cfg.y [] []
/src/kamailio/src/core/cfg_core.c [] []
/src/kamailio/src/core/crypto/rijndael.c [] []
/src/kamailio/src/core/rand/fortuna/fortuna.c [] []
/src/kamailio/src/core/core_cmd.c [] []
/src/kamailio/src/core/parser/parse_body.c [] []
/src/kamailio/src/core/io_wait.c [] []
/src/kamailio/src/core/str.c [] []
/src/kamailio/src/core/daemonize.c [] []
/src/kamailio/src/core/action.c [] []
/src/kamailio/src/core/lex.yy.c [] []
/src/kamailio/src/core/tcp_conn.h [] []
/src/kamailio/src/core/select.c [] []
/src/kamailio/src/core/cfg.tab.c [] []

Directories in report

Directory
/src/kamailio/src/core/crypto/
/src/kamailio/src/core/mem/../
/src/kamailio/src/core/cfg/../
/src/kamailio/src/core/cfg/
/src/kamailio/src/core/utils/
/src/kamailio/src/core/atomic/
/src/kamailio/src/core/crypto/../
/src/kamailio/src/core/parser/sdp/
/src/kamailio/src/core/
/src/kamailio/src/core/rand/fortuna/
/src/kamailio/./src/core/parser/../parser/
/src/kamailio/src/core/cfg/../atomic/
/src/kamailio/src/core/mem/
/src/kamailio/src/core/parser/contact/
/src/kamailio/src/core/parser/digest/
/src/kamailio/src/core/rand/
/src/kamailio/src/core/parser/../
/src/kamailio/./misc/fuzz/
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