| /* |
| american fuzzy lop++ - fuzzer code |
| -------------------------------- |
| |
| Originally written by Michal Zalewski |
| |
| Now maintained by Marc Heuse <mh@mh-sec.de>, |
| Heiko Eißfeldt <heiko.eissfeldt@hexco.de> and |
| Andrea Fioraldi <andreafioraldi@gmail.com> |
| |
| Copyright 2016, 2017 Google Inc. All rights reserved. |
| Copyright 2019-2020 AFLplusplus Project. All rights reserved. |
| |
| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
| You may obtain a copy of the License at: |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| This is the real deal: the program takes an instrumented binary and |
| attempts a variety of basic fuzzing tricks, paying close attention to |
| how they affect the execution path. |
| |
| */ |
| |
| #include "afl-fuzz.h" |
| |
| u8 be_quiet = 0; |
| |
| static u8 *get_libradamsa_path(u8 *own_loc) { |
| |
| u8 *tmp, *cp, *rsl, *own_copy; |
| |
| tmp = getenv("AFL_PATH"); |
| |
| if (tmp) { |
| |
| cp = alloc_printf("%s/libradamsa.so", tmp); |
| |
| if (access(cp, X_OK)) FATAL("Unable to find '%s'", cp); |
| |
| return cp; |
| |
| } |
| |
| own_copy = ck_strdup(own_loc); |
| rsl = strrchr(own_copy, '/'); |
| |
| if (rsl) { |
| |
| *rsl = 0; |
| |
| cp = alloc_printf("%s/libradamsa.so", own_copy); |
| ck_free(own_copy); |
| |
| if (!access(cp, X_OK)) return cp; |
| |
| } else |
| |
| ck_free(own_copy); |
| |
| if (!access(AFL_PATH "/libradamsa.so", X_OK)) { |
| |
| return ck_strdup(AFL_PATH "/libradamsa.so"); |
| |
| } |
| |
| if (!access(BIN_PATH "/libradamsa.so", X_OK)) { |
| |
| return ck_strdup(BIN_PATH "/libradamsa.so"); |
| |
| } |
| |
| SAYF( |
| "\n" cLRD "[-] " cRST |
| "Oops, unable to find the 'libradamsa.so' binary. The binary must be " |
| "built\n" |
| " separately using 'make radamsa'. If you already have the binary " |
| "installed,\n you may need to specify AFL_PATH in the environment.\n"); |
| |
| FATAL("Failed to locate 'libradamsa.so'."); |
| |
| } |
| |
| /* Display usage hints. */ |
| |
| static void usage(afl_state_t *afl, u8 *argv0, int more_help) { |
| |
| SAYF( |
| "\n%s [ options ] -- /path/to/fuzzed_app [ ... ]\n\n" |
| |
| "Required parameters:\n" |
| " -i dir - input directory with test cases\n" |
| " -o dir - output directory for fuzzer findings\n\n" |
| |
| "Execution control settings:\n" |
| " -p schedule - power schedules recompute a seed's performance " |
| "score.\n" |
| " <explore(default), fast, coe, lin, quad, exploit, " |
| "mmopt, rare>\n" |
| " see docs/power_schedules.md\n" |
| " -f file - location read by the fuzzed program (stdin)\n" |
| " -t msec - timeout for each run (auto-scaled, 50-%d ms)\n" |
| " -m megs - memory limit for child process (%d MB)\n" |
| " -Q - use binary-only instrumentation (QEMU mode)\n" |
| " -U - use unicorn-based instrumentation (Unicorn mode)\n" |
| " -W - use qemu-based instrumentation with Wine (Wine " |
| "mode)\n\n" |
| |
| "Mutator settings:\n" |
| " -R[R] - add Radamsa as mutator, add another -R to exclusivly " |
| "run it\n" |
| " -L minutes - use MOpt(imize) mode and set the limit time for " |
| "entering the\n" |
| " pacemaker mode (minutes of no new paths, 0 = " |
| "immediately).\n" |
| " a recommended value is 10-60. see " |
| "docs/README.MOpt.md\n" |
| " -c program - enable CmpLog by specifying a binary compiled for " |
| "it.\n" |
| " if using QEMU, just use -c 0.\n\n" |
| |
| "Fuzzing behavior settings:\n" |
| " -N - do not unlink the fuzzing input file (only for " |
| "devices etc.!)\n" |
| " -d - quick & dirty mode (skips deterministic steps)\n" |
| " -n - fuzz without instrumentation (dumb mode)\n" |
| " -x dir - optional fuzzer dictionary (see README.md, its really " |
| "good!)\n\n" |
| |
| "Testing settings:\n" |
| " -s seed - use a fixed seed for the RNG\n" |
| " -V seconds - fuzz for a maximum total time of seconds then " |
| "terminate\n" |
| " -E execs - fuzz for a maximum number of total executions then " |
| "terminate\n" |
| " Note: -V/-E are not precise, they are checked after a queue entry " |
| "is done\n which can be many minutes/execs later\n\n" |
| |
| "Other stuff:\n" |
| " -T text - text banner to show on the screen\n" |
| " -M / -S id - distributed mode (see docs/parallel_fuzzing.md)\n" |
| " -I command - execute this command/script when a new crash is " |
| "found\n" |
| " -B bitmap.txt - mutate a specific test case, use the out/fuzz_bitmap " |
| "file\n" |
| " -C - crash exploration mode (the peruvian rabbit thing)\n" |
| " -e ext - File extension for the temporarily generated test " |
| "case\n\n", |
| argv0, EXEC_TIMEOUT, MEM_LIMIT); |
| |
| if (more_help > 1) |
| SAYF( |
| "Environment variables used:\n" |
| "AFL_PATH: path to AFL support binaries\n" |
| "AFL_QUIET: suppress forkserver status messages\n" |
| "AFL_DEBUG_CHILD_OUTPUT: do not suppress stdout/stderr from target\n" |
| "LD_BIND_LAZY: do not set LD_BIND_NOW env var for target\n" |
| "AFL_BENCH_JUST_ONE: run the target just once\n" |
| "AFL_DUMB_FORKSRV: use fork server without feedback from target\n" |
| "AFL_CUSTOM_MUTATOR_LIBRARY: lib with afl_custom_fuzz() to mutate inputs\n" |
| "AFL_CUSTOM_MUTATOR_ONLY: avoid AFL++'s internal mutators\n" |
| "AFL_PYTHON_MODULE: mutate and trim inputs with the specified Python module\n" |
| "AFL_DEBUG: extra debugging output for Python mode trimming\n" |
| "AFL_DISABLE_TRIM: disable the trimming of test cases\n" |
| "AFL_NO_UI: switch status screen off\n" |
| "AFL_FORCE_UI: force showing the status screen (for virtual consoles)\n" |
| "AFL_NO_CPU_RED: avoid red color for showing very high cpu usage\n" |
| "AFL_SKIP_CPUFREQ: do not warn about variable cpu clocking\n" |
| "AFL_NO_FORKSRV: run target via execve instead of using the forkserver\n" |
| "AFL_NO_ARITH: skip arithmetic mutations in deterministic stage\n" |
| "AFL_SHUFFLE_QUEUE: reorder the input queue randomly on startup\n" |
| "AFL_FAST_CAL: limit the calibration stage to three cycles for speedup\n" |
| "AFL_HANG_TMOUT: override timeout value (in milliseconds)\n" |
| "AFL_PRELOAD: LD_PRELOAD / DYLD_INSERT_LIBRARIES settings for target\n" |
| "AFL_TMPDIR: directory to use for input file generation (ramdisk recommended)\n" |
| "AFL_IMPORT_FIRST: sync and import test cases from other fuzzer instances first\n" |
| "AFL_NO_AFFINITY: do not check for an unused cpu core to use for fuzzing\n" |
| "AFL_POST_LIBRARY: postprocess generated test cases before use as target input\n" |
| "AFL_SKIP_CRASHES: during initial dry run do not terminate for crashing inputs\n" |
| "AFL_I_DONT_CARE_ABOUT_MISSING_CRASHES: don't warn about core dump handlers\n" |
| "ASAN_OPTIONS: custom settings for ASAN\n" |
| " (must contain abort_on_error=1 and symbolize=0)\n" |
| "MSAN_OPTIONS: custom settings for MSAN\n" |
| " (must contain exitcode="STRINGIFY(MSAN_ERROR)" and symbolize=0)\n" |
| "AFL_SKIP_BIN_CHECK: skip the check, if the target is an excutable\n" |
| //"AFL_PERSISTENT: not supported anymore -> no effect, just a warning\n" |
| //"AFL_DEFER_FORKSRV: not supported anymore -> no effect, just a warning\n" |
| "AFL_EXIT_WHEN_DONE: exit when all inputs are run and no new finds are found\n" |
| "AFL_BENCH_UNTIL_CRASH: exit soon when the first crashing input has been found\n" |
| "AFL_AUTORESUME: resume fuzzing if directory specified by -o already exists\n" |
| "\n" |
| ); |
| else |
| SAYF( |
| "To view also the supported environment variables of afl-fuzz please " |
| "use \"-hh\".\n\n"); |
| |
| #ifdef USE_PYTHON |
| SAYF("Compiled with %s module support, see docs/custom_mutator.md\n", |
| (char *)PYTHON_VERSION); |
| #endif |
| |
| SAYF("For additional help please consult %s/README.md\n\n", doc_path); |
| |
| exit(1); |
| #undef PHYTON_SUPPORT |
| |
| } |
| |
| #ifndef AFL_LIB |
| |
| static int stricmp(char const *a, char const *b) { |
| |
| for (;; ++a, ++b) { |
| |
| int d; |
| d = tolower(*a) - tolower(*b); |
| if (d != 0 || !*a) return d; |
| |
| } |
| |
| } |
| |
| /* Main entry point */ |
| |
| int main(int argc, char **argv_orig, char **envp) { |
| |
| s32 opt; |
| u64 prev_queued = 0; |
| u32 sync_interval_cnt = 0, seek_to, show_help = 0; |
| u8 * extras_dir = 0; |
| u8 mem_limit_given = 0, exit_1 = 0; |
| char **use_argv; |
| |
| struct timeval tv; |
| struct timezone tz; |
| |
| char **argv = argv_cpy_dup(argc, argv_orig); |
| |
| afl_state_t *afl = calloc(1, sizeof(afl_state_t)); |
| if (!afl) { FATAL("Could not create afl state"); } |
| |
| afl_state_init(afl); |
| afl_fsrv_init(&afl->fsrv); |
| |
| read_afl_environment(afl, envp); |
| exit_1 = !!afl->afl_env.afl_bench_just_one; |
| |
| SAYF(cCYA "afl-fuzz" VERSION cRST |
| " based on afl by Michal Zalewski and a big online community\n"); |
| |
| doc_path = access(DOC_PATH, F_OK) != 0 ? (u8 *)"docs" : (u8 *)DOC_PATH; |
| |
| gettimeofday(&tv, &tz); |
| afl->init_seed = tv.tv_sec ^ tv.tv_usec ^ getpid(); |
| |
| while ((opt = getopt(argc, argv, |
| "+c:i:I:o:f:m:t:T:dnCB:S:M:x:QNUWe:p:s:V:E:L:hRP:")) > 0) |
| |
| switch (opt) { |
| |
| case 'I': afl->infoexec = optarg; break; |
| |
| case 'c': { |
| |
| afl->shm.cmplog_mode = 1; |
| afl->cmplog_binary = ck_strdup(optarg); |
| break; |
| |
| } |
| |
| case 's': { |
| |
| afl->init_seed = strtoul(optarg, 0L, 10); |
| afl->fixed_seed = 1; |
| break; |
| |
| } |
| |
| case 'p': /* Power schedule */ |
| |
| if (!stricmp(optarg, "fast")) { |
| |
| afl->schedule = FAST; |
| |
| } else if (!stricmp(optarg, "coe")) { |
| |
| afl->schedule = COE; |
| |
| } else if (!stricmp(optarg, "exploit")) { |
| |
| afl->schedule = EXPLOIT; |
| |
| } else if (!stricmp(optarg, "lin")) { |
| |
| afl->schedule = LIN; |
| |
| } else if (!stricmp(optarg, "quad")) { |
| |
| afl->schedule = QUAD; |
| |
| } else if (!stricmp(optarg, "mopt") || !stricmp(optarg, "mmopt")) { |
| |
| afl->schedule = MMOPT; |
| |
| } else if (!stricmp(optarg, "rare")) { |
| |
| afl->schedule = RARE; |
| |
| } else if (!stricmp(optarg, "explore") || !stricmp(optarg, "default") || |
| |
| !stricmp(optarg, "normal") || !stricmp(optarg, "afl")) { |
| |
| afl->schedule = EXPLORE; |
| |
| } else { |
| |
| FATAL("Unknown -p power schedule"); |
| |
| } |
| |
| break; |
| |
| case 'e': |
| |
| if (afl->file_extension) FATAL("Multiple -e options not supported"); |
| |
| afl->file_extension = optarg; |
| |
| break; |
| |
| case 'i': /* input dir */ |
| |
| if (afl->in_dir) FATAL("Multiple -i options not supported"); |
| afl->in_dir = optarg; |
| |
| if (!strcmp(afl->in_dir, "-")) afl->in_place_resume = 1; |
| |
| break; |
| |
| case 'o': /* output dir */ |
| |
| if (afl->out_dir) FATAL("Multiple -o options not supported"); |
| afl->out_dir = optarg; |
| break; |
| |
| case 'M': { /* master sync ID */ |
| |
| u8 *c; |
| |
| if (afl->sync_id) FATAL("Multiple -S or -M options not supported"); |
| afl->sync_id = ck_strdup(optarg); |
| |
| if ((c = strchr(afl->sync_id, ':'))) { |
| |
| *c = 0; |
| |
| if (sscanf(c + 1, "%u/%u", &afl->master_id, &afl->master_max) != 2 || |
| !afl->master_id || !afl->master_max || |
| afl->master_id > afl->master_max || afl->master_max > 1000000) |
| FATAL("Bogus master ID passed to -M"); |
| |
| } |
| |
| afl->force_deterministic = 1; |
| |
| } |
| |
| break; |
| |
| case 'S': |
| |
| if (afl->sync_id) FATAL("Multiple -S or -M options not supported"); |
| afl->sync_id = ck_strdup(optarg); |
| break; |
| |
| case 'f': /* target file */ |
| |
| if (afl->fsrv.out_file) FATAL("Multiple -f options not supported"); |
| afl->fsrv.out_file = ck_strdup(optarg); |
| afl->fsrv.use_stdin = 0; |
| break; |
| |
| case 'x': /* dictionary */ |
| |
| if (extras_dir) FATAL("Multiple -x options not supported"); |
| extras_dir = optarg; |
| break; |
| |
| case 't': { /* timeout */ |
| |
| u8 suffix = 0; |
| |
| if (afl->timeout_given) FATAL("Multiple -t options not supported"); |
| |
| if (sscanf(optarg, "%u%c", &afl->fsrv.exec_tmout, &suffix) < 1 || |
| optarg[0] == '-') |
| FATAL("Bad syntax used for -t"); |
| |
| if (afl->fsrv.exec_tmout < 5) FATAL("Dangerously low value of -t"); |
| |
| if (suffix == '+') |
| afl->timeout_given = 2; |
| else |
| afl->timeout_given = 1; |
| |
| break; |
| |
| } |
| |
| case 'm': { /* mem limit */ |
| |
| u8 suffix = 'M'; |
| |
| if (mem_limit_given) FATAL("Multiple -m options not supported"); |
| mem_limit_given = 1; |
| |
| if (!strcmp(optarg, "none")) { |
| |
| afl->fsrv.mem_limit = 0; |
| break; |
| |
| } |
| |
| if (sscanf(optarg, "%llu%c", &afl->fsrv.mem_limit, &suffix) < 1 || |
| optarg[0] == '-') |
| FATAL("Bad syntax used for -m"); |
| |
| switch (suffix) { |
| |
| case 'T': afl->fsrv.mem_limit *= 1024 * 1024; break; |
| case 'G': afl->fsrv.mem_limit *= 1024; break; |
| case 'k': afl->fsrv.mem_limit /= 1024; break; |
| case 'M': break; |
| |
| default: FATAL("Unsupported suffix or bad syntax for -m"); |
| |
| } |
| |
| if (afl->fsrv.mem_limit < 5) FATAL("Dangerously low value of -m"); |
| |
| if (sizeof(rlim_t) == 4 && afl->fsrv.mem_limit > 2000) |
| FATAL("Value of -m out of range on 32-bit systems"); |
| |
| } |
| |
| break; |
| |
| case 'd': /* skip deterministic */ |
| |
| if (afl->skip_deterministic) FATAL("Multiple -d options not supported"); |
| afl->skip_deterministic = 1; |
| afl->use_splicing = 1; |
| break; |
| |
| case 'B': /* load bitmap */ |
| |
| /* This is a secret undocumented option! It is useful if you find |
| an interesting test case during a normal fuzzing process, and want |
| to mutate it without rediscovering any of the test cases already |
| found during an earlier run. |
| |
| To use this mode, you need to point -B to the fuzz_bitmap produced |
| by an earlier run for the exact same binary... and that's it. |
| |
| I only used this once or twice to get variants of a particular |
| file, so I'm not making this an official setting. */ |
| |
| if (afl->in_bitmap) FATAL("Multiple -B options not supported"); |
| |
| afl->in_bitmap = optarg; |
| read_bitmap(afl, afl->in_bitmap); |
| break; |
| |
| case 'C': /* crash mode */ |
| |
| if (afl->crash_mode) FATAL("Multiple -C options not supported"); |
| afl->crash_mode = FAULT_CRASH; |
| break; |
| |
| case 'n': /* dumb mode */ |
| |
| if (afl->dumb_mode) FATAL("Multiple -n options not supported"); |
| if (afl->afl_env.afl_dumb_forksrv) |
| afl->dumb_mode = 2; |
| else |
| afl->dumb_mode = 1; |
| |
| break; |
| |
| case 'T': /* banner */ |
| |
| if (afl->use_banner) FATAL("Multiple -T options not supported"); |
| afl->use_banner = optarg; |
| break; |
| |
| case 'Q': /* QEMU mode */ |
| |
| if (afl->qemu_mode) FATAL("Multiple -Q options not supported"); |
| afl->qemu_mode = 1; |
| |
| if (!mem_limit_given) afl->fsrv.mem_limit = MEM_LIMIT_QEMU; |
| |
| break; |
| |
| case 'N': /* Unicorn mode */ |
| |
| if (afl->no_unlink) FATAL("Multiple -N options not supported"); |
| afl->no_unlink = 1; |
| |
| break; |
| |
| case 'U': /* Unicorn mode */ |
| |
| if (afl->unicorn_mode) FATAL("Multiple -U options not supported"); |
| afl->unicorn_mode = 1; |
| |
| if (!mem_limit_given) afl->fsrv.mem_limit = MEM_LIMIT_UNICORN; |
| |
| break; |
| |
| case 'W': /* Wine+QEMU mode */ |
| |
| if (afl->use_wine) FATAL("Multiple -W options not supported"); |
| afl->qemu_mode = 1; |
| afl->use_wine = 1; |
| |
| if (!mem_limit_given) afl->fsrv.mem_limit = 0; |
| |
| break; |
| |
| case 'V': { |
| |
| afl->most_time_key = 1; |
| if (sscanf(optarg, "%llu", &afl->most_time) < 1 || optarg[0] == '-') |
| FATAL("Bad syntax used for -V"); |
| |
| } break; |
| |
| case 'E': { |
| |
| afl->most_execs_key = 1; |
| if (sscanf(optarg, "%llu", &afl->most_execs) < 1 || optarg[0] == '-') |
| FATAL("Bad syntax used for -E"); |
| |
| } break; |
| |
| case 'L': { /* MOpt mode */ |
| |
| if (afl->limit_time_sig) FATAL("Multiple -L options not supported"); |
| afl->limit_time_sig = 1; |
| afl->havoc_max_mult = HAVOC_MAX_MULT_MOPT; |
| |
| if (sscanf(optarg, "%llu", &afl->limit_time_puppet) < 1 || |
| optarg[0] == '-') |
| FATAL("Bad syntax used for -L"); |
| |
| u64 limit_time_puppet2 = afl->limit_time_puppet * 60 * 1000; |
| |
| if (limit_time_puppet2 < afl->limit_time_puppet) |
| FATAL("limit_time overflow"); |
| afl->limit_time_puppet = limit_time_puppet2; |
| |
| SAYF("limit_time_puppet %llu\n", afl->limit_time_puppet); |
| afl->swarm_now = 0; |
| |
| if (afl->limit_time_puppet == 0) afl->key_puppet = 1; |
| |
| int i; |
| int tmp_swarm = 0; |
| |
| if (afl->g_now > afl->g_max) afl->g_now = 0; |
| afl->w_now = (afl->w_init - afl->w_end) * (afl->g_max - afl->g_now) / |
| (afl->g_max) + |
| afl->w_end; |
| |
| for (tmp_swarm = 0; tmp_swarm < swarm_num; ++tmp_swarm) { |
| |
| double total_puppet_temp = 0.0; |
| afl->swarm_fitness[tmp_swarm] = 0.0; |
| |
| for (i = 0; i < operator_num; ++i) { |
| |
| afl->stage_finds_puppet[tmp_swarm][i] = 0; |
| afl->probability_now[tmp_swarm][i] = 0.0; |
| afl->x_now[tmp_swarm][i] = |
| ((double)(random() % 7000) * 0.0001 + 0.1); |
| total_puppet_temp += afl->x_now[tmp_swarm][i]; |
| afl->v_now[tmp_swarm][i] = 0.1; |
| afl->L_best[tmp_swarm][i] = 0.5; |
| afl->G_best[i] = 0.5; |
| afl->eff_best[tmp_swarm][i] = 0.0; |
| |
| } |
| |
| for (i = 0; i < operator_num; ++i) { |
| |
| afl->stage_cycles_puppet_v2[tmp_swarm][i] = |
| afl->stage_cycles_puppet[tmp_swarm][i]; |
| afl->stage_finds_puppet_v2[tmp_swarm][i] = |
| afl->stage_finds_puppet[tmp_swarm][i]; |
| afl->x_now[tmp_swarm][i] = |
| afl->x_now[tmp_swarm][i] / total_puppet_temp; |
| |
| } |
| |
| double x_temp = 0.0; |
| |
| for (i = 0; i < operator_num; ++i) { |
| |
| afl->probability_now[tmp_swarm][i] = 0.0; |
| afl->v_now[tmp_swarm][i] = |
| afl->w_now * afl->v_now[tmp_swarm][i] + |
| RAND_C * |
| (afl->L_best[tmp_swarm][i] - afl->x_now[tmp_swarm][i]) + |
| RAND_C * (afl->G_best[i] - afl->x_now[tmp_swarm][i]); |
| |
| afl->x_now[tmp_swarm][i] += afl->v_now[tmp_swarm][i]; |
| |
| if (afl->x_now[tmp_swarm][i] > v_max) |
| afl->x_now[tmp_swarm][i] = v_max; |
| else if (afl->x_now[tmp_swarm][i] < v_min) |
| afl->x_now[tmp_swarm][i] = v_min; |
| |
| x_temp += afl->x_now[tmp_swarm][i]; |
| |
| } |
| |
| for (i = 0; i < operator_num; ++i) { |
| |
| afl->x_now[tmp_swarm][i] = afl->x_now[tmp_swarm][i] / x_temp; |
| if (likely(i != 0)) |
| afl->probability_now[tmp_swarm][i] = |
| afl->probability_now[tmp_swarm][i - 1] + |
| afl->x_now[tmp_swarm][i]; |
| else |
| afl->probability_now[tmp_swarm][i] = afl->x_now[tmp_swarm][i]; |
| |
| } |
| |
| if (afl->probability_now[tmp_swarm][operator_num - 1] < 0.99 || |
| afl->probability_now[tmp_swarm][operator_num - 1] > 1.01) |
| FATAL("ERROR probability"); |
| |
| } |
| |
| for (i = 0; i < operator_num; ++i) { |
| |
| afl->core_operator_finds_puppet[i] = 0; |
| afl->core_operator_finds_puppet_v2[i] = 0; |
| afl->core_operator_cycles_puppet[i] = 0; |
| afl->core_operator_cycles_puppet_v2[i] = 0; |
| afl->core_operator_cycles_puppet_v3[i] = 0; |
| |
| } |
| |
| } break; |
| |
| case 'h': show_help++; break; // not needed |
| |
| case 'R': |
| |
| if (afl->use_radamsa) |
| afl->use_radamsa = 2; |
| else |
| afl->use_radamsa = 1; |
| |
| break; |
| |
| default: |
| if (!show_help) show_help = 1; |
| |
| } |
| |
| if (optind == argc || !afl->in_dir || !afl->out_dir || show_help) |
| usage(afl, argv[0], show_help); |
| |
| OKF("afl++ is maintained by Marc \"van Hauser\" Heuse, Heiko \"hexcoder\" " |
| "Eißfeldt, Andrea Fioraldi and Dominik Maier"); |
| OKF("afl++ is open source, get it at " |
| "https://github.com/AFLplusplus/AFLplusplus"); |
| OKF("Power schedules from github.com/mboehme/aflfast"); |
| OKF("Python Mutator and llvm_mode whitelisting from github.com/choller/afl"); |
| OKF("afl-tmin fork server patch from github.com/nccgroup/TriforceAFL"); |
| OKF("MOpt Mutator from github.com/puppet-meteor/MOpt-AFL"); |
| |
| if (afl->sync_id && afl->force_deterministic && |
| getenv("AFL_CUSTOM_MUTATOR_ONLY")) |
| WARNF( |
| "Using -M master with the AFL_CUSTOM_MUTATOR_ONLY mutator options will " |
| "result in no deterministic mutations being done!"); |
| |
| if (afl->fixed_seed) OKF("Running with fixed seed: %u", (u32)afl->init_seed); |
| srandom((u32)afl->init_seed); |
| |
| if (afl->use_radamsa) { |
| |
| if (afl->limit_time_sig) |
| FATAL( |
| "MOpt and Radamsa are mutually exclusive. We accept pull requests " |
| "that integrates MOpt with the optional mutators " |
| "(custom/radamsa/redquenn/...)."); |
| |
| OKF("Using Radamsa add-on"); |
| |
| u8 * libradamsa_path = get_libradamsa_path(argv[0]); |
| void *handle = dlopen(libradamsa_path, RTLD_NOW); |
| ck_free(libradamsa_path); |
| |
| if (!handle) FATAL("Failed to dlopen() libradamsa"); |
| |
| void (*radamsa_init_ptr)(void) = dlsym(handle, "radamsa_init"); |
| afl->radamsa_mutate_ptr = dlsym(handle, "radamsa"); |
| |
| if (!radamsa_init_ptr || !afl->radamsa_mutate_ptr) |
| FATAL("Failed to dlsym() libradamsa"); |
| |
| /* randamsa_init installs some signal hadlers, call it before |
| setup_signal_handlers so that AFL++ can then replace those signal |
| handlers */ |
| radamsa_init_ptr(); |
| |
| } |
| |
| setup_signal_handlers(); |
| check_asan_opts(); |
| |
| afl->power_name = power_names[afl->schedule]; |
| |
| if (afl->sync_id) fix_up_sync(afl); |
| |
| if (!strcmp(afl->in_dir, afl->out_dir)) |
| FATAL("Input and output directories can't be the same"); |
| |
| if (afl->dumb_mode) { |
| |
| if (afl->crash_mode) FATAL("-C and -n are mutually exclusive"); |
| if (afl->qemu_mode) FATAL("-Q and -n are mutually exclusive"); |
| if (afl->unicorn_mode) FATAL("-U and -n are mutually exclusive"); |
| |
| } |
| |
| if (get_afl_env("AFL_DISABLE_TRIM")) afl->disable_trim = 1; |
| |
| if (getenv("AFL_NO_UI") && getenv("AFL_FORCE_UI")) |
| FATAL("AFL_NO_UI and AFL_FORCE_UI are mutually exclusive"); |
| |
| if (strchr(argv[optind], '/') == NULL && !afl->unicorn_mode) |
| WARNF(cLRD |
| "Target binary called without a prefixed path, make sure you are " |
| "fuzzing the right binary: " cRST "%s", |
| argv[optind]); |
| |
| ACTF("Getting to work..."); |
| |
| switch (afl->schedule) { |
| |
| case FAST: OKF("Using exponential power schedule (FAST)"); break; |
| case COE: OKF("Using cut-off exponential power schedule (COE)"); break; |
| case EXPLOIT: |
| OKF("Using exploitation-based constant power schedule (EXPLOIT)"); |
| break; |
| case LIN: OKF("Using linear power schedule (LIN)"); break; |
| case QUAD: OKF("Using quadratic power schedule (QUAD)"); break; |
| case MMOPT: OKF("Using modified MOpt power schedule (MMOPT)"); break; |
| case RARE: OKF("Using rare edge focus power schedule (RARE)"); break; |
| case EXPLORE: |
| OKF("Using exploration-based constant power schedule (EXPLORE, default)"); |
| break; |
| default: FATAL("Unknown power schedule"); break; |
| |
| } |
| |
| if (get_afl_env("AFL_NO_FORKSRV")) afl->no_forkserver = 1; |
| if (get_afl_env("AFL_NO_CPU_RED")) afl->no_cpu_meter_red = 1; |
| if (get_afl_env("AFL_NO_ARITH")) afl->no_arith = 1; |
| if (get_afl_env("AFL_SHUFFLE_QUEUE")) afl->shuffle_queue = 1; |
| if (get_afl_env("AFL_FAST_CAL")) afl->fast_cal = 1; |
| |
| if (afl->afl_env.afl_autoresume) { |
| |
| afl->autoresume = 1; |
| if (afl->in_place_resume) SAYF("AFL_AUTORESUME has no effect for '-i -'"); |
| |
| } |
| |
| if (afl->afl_env.afl_hang_tmout) { |
| |
| afl->hang_tmout = atoi(afl->afl_env.afl_hang_tmout); |
| if (!afl->hang_tmout) FATAL("Invalid value of AFL_HANG_TMOUT"); |
| |
| } |
| |
| if (afl->dumb_mode == 2 && afl->no_forkserver) |
| FATAL("AFL_DUMB_FORKSRV and AFL_NO_FORKSRV are mutually exclusive"); |
| |
| afl->fsrv.use_fauxsrv = afl->dumb_mode == 1 || afl->no_forkserver; |
| |
| if (getenv("LD_PRELOAD")) |
| WARNF( |
| "LD_PRELOAD is set, are you sure that is what to you want to do " |
| "instead of using AFL_PRELOAD?"); |
| |
| if (afl->afl_env.afl_preload) { |
| |
| if (afl->qemu_mode) { |
| |
| u8 *qemu_preload = getenv("QEMU_SET_ENV"); |
| u8 *afl_preload = getenv("AFL_PRELOAD"); |
| u8 *buf; |
| |
| s32 i, afl_preload_size = strlen(afl_preload); |
| for (i = 0; i < afl_preload_size; ++i) { |
| |
| if (afl_preload[i] == ',') |
| PFATAL( |
| "Comma (',') is not allowed in AFL_PRELOAD when -Q is " |
| "specified!"); |
| |
| } |
| |
| if (qemu_preload) |
| buf = alloc_printf("%s,LD_PRELOAD=%s,DYLD_INSERT_LIBRARIES=%s", |
| qemu_preload, afl_preload, afl_preload); |
| else |
| buf = alloc_printf("LD_PRELOAD=%s,DYLD_INSERT_LIBRARIES=%s", |
| afl_preload, afl_preload); |
| |
| setenv("QEMU_SET_ENV", buf, 1); |
| |
| ck_free(buf); |
| |
| } else { |
| |
| setenv("LD_PRELOAD", getenv("AFL_PRELOAD"), 1); |
| setenv("DYLD_INSERT_LIBRARIES", getenv("AFL_PRELOAD"), 1); |
| |
| } |
| |
| } |
| |
| if (getenv("AFL_LD_PRELOAD")) |
| FATAL("Use AFL_PRELOAD instead of AFL_LD_PRELOAD"); |
| |
| save_cmdline(afl, argc, argv); |
| |
| fix_up_banner(afl, argv[optind]); |
| |
| check_if_tty(afl); |
| if (afl->afl_env.afl_force_ui) afl->not_on_tty = 0; |
| |
| if (get_afl_env("AFL_CAL_FAST")) { |
| |
| /* Use less calibration cycles, for slow applications */ |
| afl->cal_cycles = 3; |
| afl->cal_cycles_long = 5; |
| |
| } |
| |
| if (get_afl_env("AFL_DEBUG")) afl->debug = 1; |
| |
| if (afl->afl_env.afl_custom_mutator_only) { |
| |
| /* This ensures we don't proceed to havoc/splice */ |
| afl->custom_only = 1; |
| |
| /* Ensure we also skip all deterministic steps */ |
| afl->skip_deterministic = 1; |
| |
| } |
| |
| get_core_count(afl); |
| |
| #ifdef HAVE_AFFINITY |
| bind_to_free_cpu(afl); |
| #endif /* HAVE_AFFINITY */ |
| |
| check_crash_handling(); |
| check_cpu_governor(afl); |
| |
| afl->fsrv.trace_bits = afl_shm_init(&afl->shm, MAP_SIZE, afl->dumb_mode); |
| |
| setup_post(afl); |
| |
| if (!afl->in_bitmap) memset(afl->virgin_bits, 255, MAP_SIZE); |
| memset(afl->virgin_tmout, 255, MAP_SIZE); |
| memset(afl->virgin_crash, 255, MAP_SIZE); |
| |
| init_count_class16(); |
| |
| setup_dirs_fds(afl); |
| |
| setup_custom_mutator(afl); |
| |
| setup_cmdline_file(afl, argv + optind); |
| |
| read_testcases(afl); |
| load_auto(afl); |
| |
| pivot_inputs(afl); |
| |
| if (extras_dir) load_extras(afl, extras_dir); |
| |
| if (!afl->timeout_given) find_timeout(afl); |
| |
| if ((afl->tmp_dir = afl->afl_env.afl_tmpdir) != NULL && |
| !afl->in_place_resume) { |
| |
| char tmpfile[afl->file_extension ? strlen(afl->tmp_dir) + 1 + 10 + 1 + |
| strlen(afl->file_extension) + 1 |
| : strlen(afl->tmp_dir) + 1 + 10 + 1]; |
| if (afl->file_extension) { |
| |
| sprintf(tmpfile, "%s/.cur_input.%s", afl->tmp_dir, afl->file_extension); |
| |
| } else { |
| |
| sprintf(tmpfile, "%s/.cur_input", afl->tmp_dir); |
| |
| } |
| |
| if (access(tmpfile, F_OK) != |
| -1) // there is still a race condition here, but well ... |
| FATAL( |
| "AFL_TMPDIR already has an existing temporary input file: %s - if " |
| "this is not from another instance, then just remove the file.", |
| tmpfile); |
| |
| } else |
| |
| afl->tmp_dir = afl->out_dir; |
| |
| /* If we don't have a file name chosen yet, use a safe default. */ |
| |
| if (!afl->fsrv.out_file) { |
| |
| u32 i = optind + 1; |
| while (argv[i]) { |
| |
| u8 *aa_loc = strstr(argv[i], "@@"); |
| |
| if (aa_loc && !afl->fsrv.out_file) { |
| |
| afl->fsrv.use_stdin = 0; |
| |
| if (afl->file_extension) { |
| |
| afl->fsrv.out_file = alloc_printf("%s/.cur_input.%s", afl->tmp_dir, |
| afl->file_extension); |
| |
| } else { |
| |
| afl->fsrv.out_file = alloc_printf("%s/.cur_input", afl->tmp_dir); |
| |
| } |
| |
| detect_file_args(argv + optind + 1, afl->fsrv.out_file, |
| &afl->fsrv.use_stdin); |
| break; |
| |
| } |
| |
| ++i; |
| |
| } |
| |
| } |
| |
| if (!afl->fsrv.out_file) setup_stdio_file(afl); |
| |
| if (afl->cmplog_binary) { |
| |
| if (afl->limit_time_sig) |
| FATAL( |
| "MOpt and CmpLog are mutually exclusive. We accept pull requests " |
| "that integrates MOpt with the optional mutators " |
| "(custom/radamsa/redquenn/...)."); |
| |
| if (afl->unicorn_mode) |
| FATAL("CmpLog and Unicorn mode are not compatible at the moment, sorry"); |
| if (!afl->qemu_mode) check_binary(afl, afl->cmplog_binary); |
| |
| } |
| |
| check_binary(afl, argv[optind]); |
| |
| afl->start_time = get_cur_time(); |
| |
| if (afl->qemu_mode) { |
| |
| if (afl->use_wine) |
| use_argv = get_wine_argv(argv[0], &afl->fsrv.target_path, argc - optind, |
| argv + optind); |
| else |
| use_argv = get_qemu_argv(argv[0], &afl->fsrv.target_path, argc - optind, |
| argv + optind); |
| |
| } else { |
| |
| use_argv = argv + optind; |
| |
| } |
| |
| afl->argv = use_argv; |
| perform_dry_run(afl); |
| |
| cull_queue(afl); |
| |
| show_init_stats(afl); |
| |
| seek_to = find_start_position(afl); |
| |
| write_stats_file(afl, 0, 0, 0); |
| maybe_update_plot_file(afl, 0, 0); |
| save_auto(afl); |
| |
| if (afl->stop_soon) goto stop_fuzzing; |
| |
| /* Woop woop woop */ |
| |
| if (!afl->not_on_tty) { |
| |
| sleep(4); |
| afl->start_time += 4000; |
| if (afl->stop_soon) goto stop_fuzzing; |
| |
| } |
| |
| // real start time, we reset, so this works correctly with -V |
| afl->start_time = get_cur_time(); |
| |
| while (1) { |
| |
| u8 skipped_fuzz; |
| |
| cull_queue(afl); |
| |
| if (!afl->queue_cur) { |
| |
| ++afl->queue_cycle; |
| afl->current_entry = 0; |
| afl->cur_skipped_paths = 0; |
| afl->queue_cur = afl->queue; |
| |
| while (seek_to) { |
| |
| ++afl->current_entry; |
| --seek_to; |
| afl->queue_cur = afl->queue_cur->next; |
| |
| } |
| |
| show_stats(afl); |
| |
| if (afl->not_on_tty) { |
| |
| ACTF("Entering queue cycle %llu.", afl->queue_cycle); |
| fflush(stdout); |
| |
| } |
| |
| /* If we had a full queue cycle with no new finds, try |
| recombination strategies next. */ |
| |
| if (afl->queued_paths == prev_queued) { |
| |
| if (afl->use_splicing) |
| ++afl->cycles_wo_finds; |
| else |
| afl->use_splicing = 1; |
| |
| } else |
| |
| afl->cycles_wo_finds = 0; |
| |
| prev_queued = afl->queued_paths; |
| |
| if (afl->sync_id && afl->queue_cycle == 1 && |
| afl->afl_env.afl_import_first) |
| sync_fuzzers(afl); |
| |
| } |
| |
| skipped_fuzz = fuzz_one(afl); |
| |
| if (!skipped_fuzz && !afl->stop_soon && afl->sync_id) { |
| |
| if (!(sync_interval_cnt++ % SYNC_INTERVAL)) sync_fuzzers(afl); |
| |
| } |
| |
| if (!afl->stop_soon && exit_1) afl->stop_soon = 2; |
| |
| if (afl->stop_soon) break; |
| |
| afl->queue_cur = afl->queue_cur->next; |
| ++afl->current_entry; |
| |
| if (afl->most_time_key == 1) { |
| |
| u64 cur_ms_lv = get_cur_time(); |
| if (afl->most_time * 1000 < cur_ms_lv - afl->start_time) { |
| |
| afl->most_time_key = 2; |
| afl->stop_soon = 2; |
| break; |
| |
| } |
| |
| } |
| |
| if (afl->most_execs_key == 1) { |
| |
| if (afl->most_execs <= afl->total_execs) { |
| |
| afl->most_execs_key = 2; |
| afl->stop_soon = 2; |
| break; |
| |
| } |
| |
| } |
| |
| } |
| |
| if (afl->queue_cur) show_stats(afl); |
| |
| /* |
| * ATTENTION - the following 10 lines were copied from a PR to Google's afl |
| * repository - and slightly fixed. |
| * These lines have nothing to do with the purpose of original PR though. |
| * Looks like when an exit condition was completed (AFL_BENCH_JUST_ONE, |
| * AFL_EXIT_WHEN_DONE or AFL_BENCH_UNTIL_CRASH) the child and forkserver |
| * where not killed? |
| */ |
| /* if we stopped programmatically, we kill the forkserver and the current |
| runner. if we stopped manually, this is done by the signal handler */ |
| if (afl->stop_soon == 2) { |
| |
| if (afl->fsrv.child_pid > 0) kill(afl->fsrv.child_pid, SIGKILL); |
| if (afl->fsrv.fsrv_pid > 0) kill(afl->fsrv.fsrv_pid, SIGKILL); |
| if (afl->cmplog_child_pid > 0) kill(afl->cmplog_child_pid, SIGKILL); |
| if (afl->cmplog_fsrv_pid > 0) kill(afl->cmplog_fsrv_pid, SIGKILL); |
| /* Now that we've killed the forkserver, we wait for it to be able to get |
| * rusage stats. */ |
| if (waitpid(afl->fsrv.fsrv_pid, NULL, 0) <= 0) { WARNF("error waitpid\n"); } |
| |
| } |
| |
| write_bitmap(afl); |
| write_stats_file(afl, 0, 0, 0); |
| maybe_update_plot_file(afl, 0, 0); |
| save_auto(afl); |
| |
| stop_fuzzing: |
| |
| afl->force_ui_update = 1; // ensure the screen is reprinted |
| show_stats(afl); // print the screen one last time |
| |
| SAYF(CURSOR_SHOW cLRD "\n\n+++ Testing aborted %s +++\n" cRST, |
| afl->stop_soon == 2 ? "programmatically" : "by user"); |
| |
| if (afl->most_time_key == 2) |
| SAYF(cYEL "[!] " cRST "Time limit was reached\n"); |
| if (afl->most_execs_key == 2) |
| SAYF(cYEL "[!] " cRST "Execution limit was reached\n"); |
| |
| /* Running for more than 30 minutes but still doing first cycle? */ |
| |
| if (afl->queue_cycle == 1 && |
| get_cur_time() - afl->start_time > 30 * 60 * 1000) { |
| |
| SAYF("\n" cYEL "[!] " cRST |
| "Stopped during the first cycle, results may be incomplete.\n" |
| " (For info on resuming, see %s/README.md)\n", |
| doc_path); |
| |
| } |
| |
| fclose(afl->fsrv.plot_file); |
| destroy_queue(afl); |
| destroy_extras(afl); |
| destroy_custom_mutator(afl); |
| afl_shm_deinit(&afl->shm); |
| afl_fsrv_deinit(&afl->fsrv); |
| if (afl->orig_cmdline) ck_free(afl->orig_cmdline); |
| ck_free(afl->fsrv.target_path); |
| ck_free(afl->fsrv.out_file); |
| ck_free(afl->sync_id); |
| free(afl); /* not tracked */ |
| |
| argv_cpy_free(argv); |
| |
| alloc_report(); |
| |
| OKF("We're done here. Have a nice day!\n"); |
| |
| exit(0); |
| |
| } |
| |
| #endif /* !AFL_LIB */ |
| |
