High level conclusions

Reachability and coverage 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.

Fuzzer: fuzz_util.c

Call tree

Fuzzer: fuzz_dhcp.c

Call tree

Fuzzer: fuzz_auth.c

Call tree

Fuzzer: fuzz_rfc1035.c

Call tree

Fuzzer: fuzz_dhcp6.c

Call tree

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.

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

All functions overview

If you implement fuzzers for these functions, the status of all functions in the project will be:

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.

fuzz_util.c

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

fuzz_dhcp.c

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

fuzz_auth.c

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

fuzz_rfc1035.c

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

fuzz_dhcp6.c

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

New fuzzers

The below fuzzers are templates and suggestions for how to target the set of optimal functions above

dhcp.c

#include "ada_fuzz_header.h"

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
  af_safe_gb_init(data, size);

  /* target dhcp_packet */
  UNKNOWN_TYPE unknown_0;
  int new_var1 = ada_safe_get_int();
  dhcp_packet(unknown_0, new_var1);

  af_safe_gb_cleanup();
}

option.c

#include "ada_fuzz_header.h"

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
  af_safe_gb_init(data, size);

  /* target one_opt */
  int new_var2 = ada_safe_get_int();
  char *new_var3 = ada_safe_get_char_p();
  char *new_var4 = ada_safe_get_char_p();
  char *new_var5 = ada_safe_get_char_p();
  int new_var6 = ada_safe_get_int();
  int new_var7 = ada_safe_get_int();
  one_opt(new_var2, new_var3, new_var4, new_var5, new_var6, new_var7);

  /* target read_opts */
  int new_var18 = ada_safe_get_int();
  char **new_var19 = af_get_double_char_p();
  char *new_var20 = ada_safe_get_char_p();
  read_opts(new_var18, new_var19, new_var20);

  af_safe_gb_cleanup();
}

dnsmasq.c

#include "ada_fuzz_header.h"

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
  af_safe_gb_init(data, size);

  /* target async_event */
  int new_var8 = ada_safe_get_int();
  UNKNOWN_TYPE unknown_9;
  async_event(new_var8, unknown_9);

  af_safe_gb_cleanup();
}

helper.c

#include "ada_fuzz_header.h"

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
  af_safe_gb_init(data, size);

  /* target create_helper */
  int new_var10 = ada_safe_get_int();
  int new_var11 = ada_safe_get_int();
  UNKNOWN_TYPE unknown_12;
  UNKNOWN_TYPE unknown_13;
  UNKNOWN_TYPE unknown_14;
  create_helper(new_var10, new_var11, unknown_12, unknown_13, unknown_14);

  af_safe_gb_cleanup();
}

dbus.c

#include "ada_fuzz_header.h"

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
  af_safe_gb_init(data, size);

  /* target message_handler */
  UNKNOWN_TYPE unknown_15;
  UNKNOWN_TYPE unknown_16;
  UNKNOWN_TYPE unknown_17;
  message_handler(unknown_15, unknown_16, unknown_17);

  af_safe_gb_cleanup();
}

dnssec.c

#include "ada_fuzz_header.h"

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
  af_safe_gb_init(data, size);

  /* target prove_non_existence_nsec3 */
  structdns_header* new_var21 = calloc(sizeof(structdns_header), 1);
  UNKNOWN_TYPE unknown_22;
  UNKNOWN_TYPE unknown_23;
  int new_var24 = ada_safe_get_int();
  char *new_var25 = ada_safe_get_char_p();
  char *new_var26 = ada_safe_get_char_p();
  char *new_var27 = ada_safe_get_char_p();
  int new_var28 = ada_safe_get_int();
  char *new_var29 = ada_safe_get_char_p();
  int *new_var30 = af_get_int_p();
  int *new_var31 = af_get_int_p();
  prove_non_existence_nsec3(new_var21, unknown_22, unknown_23, new_var24, new_var25, new_var26, new_var27, new_var28, new_var29, new_var30, new_var31);

  /* target prove_non_existence_nsec */
  structdns_header* new_var40 = calloc(sizeof(structdns_header), 1);
  UNKNOWN_TYPE unknown_41;
  UNKNOWN_TYPE unknown_42;
  UNKNOWN_TYPE unknown_43;
  int new_var44 = ada_safe_get_int();
  char *new_var45 = ada_safe_get_char_p();
  char *new_var46 = ada_safe_get_char_p();
  char *new_var47 = ada_safe_get_char_p();
  int new_var48 = ada_safe_get_int();
  int *new_var49 = af_get_int_p();
  prove_non_existence_nsec(new_var40, unknown_41, unknown_42, unknown_43, new_var44, new_var45, new_var46, new_var47, new_var48, new_var49);

  af_safe_gb_cleanup();
}

network.c

#include "ada_fuzz_header.h"

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
  af_safe_gb_init(data, size);

  /* target iface_allowed_v6 */
  structin6_addr* new_var32 = calloc(sizeof(structin6_addr), 1);
  int new_var33 = ada_safe_get_int();
  int new_var34 = ada_safe_get_int();
  int new_var35 = ada_safe_get_int();
  int new_var36 = ada_safe_get_int();
  UNKNOWN_TYPE unknown_37;
  UNKNOWN_TYPE unknown_38;
  UNKNOWN_TYPE unknown_39;
  iface_allowed_v6(new_var32, new_var33, new_var34, new_var35, new_var36, unknown_37, unknown_38, unknown_39);

  af_safe_gb_cleanup();
}

lease.c

#include "ada_fuzz_header.h"

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
  af_safe_gb_init(data, size);

  /* target lease_init */
  UNKNOWN_TYPE unknown_50;
  lease_init(unknown_50);

  af_safe_gb_cleanup();
}

Files in report

Directories in report

This section shows a list of 3rd party function calls and their relative coverage information. By static analysis of the target project code, all of the 3rd party function call and their caller information, including the source file and line number that initiate the call are captured. The caller source code file and line number are shown in column 2 while column 1 is the function name of the 3rd party function call. Each occurrent of the 3rd party function call will occuply a separate row. Column 3 of each row indicate if the 3rd party call in the source file line is unreachable. Column 4 lists all fuzzers that have covered that particular system call in that specific location (source file and line)during their dynamic fuzzing.

Function in each files in report