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

Project functions overview

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 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 0 162 74.6%
gold [1:9] 12 5.52%
yellow [10:29] 7 3.22%
greenyellow [30:49] 1 0.46%
lawngreen 50+ 35 16.1%
All colors 217 100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked Calltree index Parent function Callsite Largest blocked function
156 4 parse_uri call site: 00004 dprint_color
6 162 parse_uri call site: 00162 dprint_color

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 5
src/core/pt.c 1
./src/core/parser/../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 0 660 25.5%
gold [1:9] 138 5.34%
yellow [10:29] 177 6.85%
greenyellow [30:49] 204 7.89%
lawngreen 50+ 1404 54.3%
All colors 2583 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
150 5 parse_first_line call site: 00005 dprint_term_color
25 2155 parse_contact_class call site: 02155 parse_uri_class
20 2487 LLVMFuzzerTestOneInput call site: 02487 dprint_color
18 485 parse_via call site: 00485 dprint_color
18 654 parse_via_param call site: 00654 dprint_color
14 1930 parse_from_header call site: 01930 parse_to
14 2567 free_hdr_field_lst call site: 02567 free_lump_list
13 1323 clean_hdr_field call site: 01323 dprint_color
12 593 parse_via call site: 00593 dprint_color
12 714 parse_via_param call site: 00714 dprint_color
12 1403 parse_sdp call site: 01403 dprint_color
12 1632 parse_sdp_session call site: 01632 dprint_color

Runtime coverage analysis

Covered functions
150
Functions that are reachable but not covered
34
Reachable functions
181
Percentage of reachable functions covered
81.22%
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
./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 5
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 4
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 5
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_diversion.c 3
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 26
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/../parser/sdp/../../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_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
tcp_init_children /src/kamailio/src/core/tcp_main.c 1 ['N/A'] 26 0 1612 274 89 668 2 23710 18997
fix_actions /src/kamailio/src/core/route.c 1 ['N/A'] 48 0 14008 2215 713 517 11 22764 4210
print_action /src/kamailio/src/core/route_struct.c 1 ['N/A'] 7 0 14939 2447 766 15 6 2598 2179
pp_substdef_add /src/kamailio/src/core/ppcfg.c 2 ['N/A', 'int'] 14 0 2716 451 149 161 2 6049 2173
handle_tcpconn_ev /src/kamailio/src/core/tcp_main.c 3 ['N/A', 'short', 'int'] 27 0 3182 500 166 581 0 23361 1225
shm_init_manager /src/kamailio/src/core/mem/shm.c 1 ['N/A'] 11 0 117 29 11 88 3 1597 1188
cfg_del_delayed /src/kamailio/src/core/cfg/cfg_ctx.c 4 ['N/A', 'N/A', 'N/A', 'N/A'] 10 0 24 3 2 44 0 1576 1169

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

Functions statically reachable by fuzzers
34.0%
861 / 2549
Cyclomatic complexity statically reachable by fuzzers
52.0%
37475 / 71794

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

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

Directories in report

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