| /* |
| 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" |
| #include "cmplog.h" |
| #include <limits.h> |
| #ifndef USEMMAP |
| #include <sys/mman.h> |
| #include <sys/stat.h> |
| #include <fcntl.h> |
| #include <sys/ipc.h> |
| #include <sys/shm.h> |
| #endif |
| |
| #ifdef PROFILING |
| extern u64 time_spent_working; |
| #endif |
| |
| static void at_exit() { |
| |
| int i; |
| char *list[4] = {SHM_ENV_VAR, SHM_FUZZ_ENV_VAR, CMPLOG_SHM_ENV_VAR, NULL}; |
| char *ptr = getenv("__AFL_TARGET_PID1"); |
| |
| if (ptr && *ptr && (i = atoi(ptr)) > 0) kill(i, SIGKILL); |
| |
| ptr = getenv("__AFL_TARGET_PID2"); |
| |
| if (ptr && *ptr && (i = atoi(ptr)) > 0) kill(i, SIGKILL); |
| |
| i = 0; |
| while (list[i] != NULL) { |
| |
| ptr = getenv(list[i]); |
| |
| if (ptr && *ptr) { |
| |
| #ifdef USEMMAP |
| |
| shm_unlink(ptr); |
| |
| #else |
| |
| shmctl(atoi(ptr), IPC_RMID, NULL); |
| |
| #endif |
| |
| } |
| |
| i++; |
| |
| } |
| |
| } |
| |
| /* 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 compute a seed's performance score. " |
| "<explore\n" |
| " (default), fast, coe, lin, quad, exploit, mmopt, " |
| "rare, seek>\n" |
| " see docs/power_schedules.md\n" |
| " -f file - location read by the fuzzed program (default: stdin " |
| "or @@)\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" |
| " -L minutes - use MOpt(imize) mode and set the time limit for " |
| "entering the\n" |
| " pacemaker mode (minutes of no new paths). 0 = " |
| "immediately,\n" |
| " -1 = immediately and together with normal mutation).\n" |
| " 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 (non-instrumented mode)\n" |
| " -x dict_file - 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 specific time then terminate\n" |
| " -E execs - fuzz for a approx. no of total executions then " |
| "terminate\n" |
| " Note: not precise and can have several more " |
| "executions.\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" |
| " use -D to force -S secondary to perform deterministic " |
| "fuzzing\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 fuzz test input file (if " |
| "needed)\n\n", |
| argv0, EXEC_TIMEOUT, MEM_LIMIT); |
| |
| if (more_help > 1) { |
| |
| SAYF( |
| "Environment variables used:\n" |
| "LD_BIND_LAZY: do not set LD_BIND_NOW env var for target\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_AUTORESUME: resume fuzzing if directory specified by -o already exists\n" |
| "AFL_BENCH_JUST_ONE: run the target just once\n" |
| "AFL_BENCH_UNTIL_CRASH: exit soon when the first crashing input has been found\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_DEBUG: extra debugging output for Python mode trimming\n" |
| "AFL_DEBUG_CHILD_OUTPUT: do not suppress stdout/stderr from target\n" |
| "AFL_DISABLE_TRIM: disable the trimming of test cases\n" |
| "AFL_DUMB_FORKSRV: use fork server without feedback from target\n" |
| "AFL_EXIT_WHEN_DONE: exit when all inputs are run and no new finds are found\n" |
| "AFL_FAST_CAL: limit the calibration stage to three cycles for speedup\n" |
| "AFL_FORCE_UI: force showing the status screen (for virtual consoles)\n" |
| "AFL_HANG_TMOUT: override timeout value (in milliseconds)\n" |
| "AFL_I_DONT_CARE_ABOUT_MISSING_CRASHES: don't warn about core dump handlers\n" |
| "AFL_IMPORT_FIRST: sync and import test cases from other fuzzer instances first\n" |
| "AFL_MAP_SIZE: the shared memory size for that target. must be >= the size\n" |
| " the target was compiled for\n" |
| "AFL_NO_AFFINITY: do not check for an unused cpu core to use for fuzzing\n" |
| "AFL_NO_ARITH: skip arithmetic mutations in deterministic stage\n" |
| "AFL_NO_CPU_RED: avoid red color for showing very high cpu usage\n" |
| "AFL_NO_FORKSRV: run target via execve instead of using the forkserver\n" |
| "AFL_NO_SNAPSHOT: do not use the snapshot feature (if the snapshot lkm is loaded)\n" |
| "AFL_NO_UI: switch status screen off\n" |
| "AFL_PATH: path to AFL support binaries\n" |
| "AFL_PYTHON_MODULE: mutate and trim inputs with the specified Python module\n" |
| "AFL_QUIET: suppress forkserver status messages\n" |
| "AFL_PRELOAD: LD_PRELOAD / DYLD_INSERT_LIBRARIES settings for target\n" |
| "AFL_SHUFFLE_QUEUE: reorder the input queue randomly on startup\n" |
| "AFL_SKIP_BIN_CHECK: skip the check, if the target is an excutable\n" |
| "AFL_SKIP_CPUFREQ: do not warn about variable cpu clocking\n" |
| "AFL_SKIP_CRASHES: during initial dry run do not terminate for crashing inputs\n" |
| "AFL_TMPDIR: directory to use for input file generation (ramdisk recommended)\n" |
| //"AFL_PERSISTENT: not supported anymore -> no effect, just a warning\n" |
| //"AFL_DEFER_FORKSRV: not supported anymore -> no effect, just a warning\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); |
| #else |
| SAYF("Compiled without python module support\n"); |
| #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) { |
| |
| if (!a || !b) { FATAL("Null reference"); } |
| |
| for (;; ++a, ++b) { |
| |
| int d; |
| d = tolower((int)*a) - tolower((int)*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, map_size = MAP_SIZE; |
| u8 * extras_dir = 0; |
| u8 mem_limit_given = 0, exit_1 = 0, debug = 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"); } |
| |
| if (get_afl_env("AFL_DEBUG")) { debug = afl->debug = 1; } |
| |
| map_size = get_map_size(); |
| afl_state_init(afl, map_size); |
| afl->debug = debug; |
| afl_fsrv_init(&afl->fsrv); |
| |
| read_afl_environment(afl, envp); |
| if (afl->shm.map_size) { afl->fsrv.map_size = afl->shm.map_size; } |
| 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); |
| rand_set_seed(afl, tv.tv_sec ^ tv.tv_usec ^ getpid()); |
| |
| while ((opt = getopt(argc, argv, |
| "+c:i:I:o:f:m:t:T:dDnCB: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': { |
| |
| rand_set_seed(afl, 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, "seek")) { |
| |
| afl->schedule = SEEK; |
| |
| } 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': { /* main 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->main_node_id, &afl->main_node_max) != |
| 2 || |
| !afl->main_node_id || !afl->main_node_max || |
| afl->main_node_id > afl->main_node_max || |
| afl->main_node_max > 1000000) { |
| |
| FATAL("Bogus main node ID passed to -M"); |
| |
| } |
| |
| } |
| |
| afl->is_main_node = 1; |
| |
| } |
| |
| break; |
| |
| case 'S': /* secondary sync id */ |
| |
| if (afl->sync_id) { FATAL("Multiple -S or -M options not supported"); } |
| afl->sync_id = ck_strdup(optarg); |
| afl->is_secondary_node = 1; |
| afl->skip_deterministic = 1; |
| afl->use_splicing = 1; |
| 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 (!optarg) { FATAL("Wrong usage of -m"); } |
| |
| 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': /* enforce deterministic */ |
| |
| afl->skip_deterministic = 0; |
| break; |
| |
| case 'd': /* skip deterministic */ |
| |
| 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->in_bitmap, afl->virgin_bits, afl->fsrv.map_size); |
| break; |
| |
| case 'C': /* crash mode */ |
| |
| if (afl->crash_mode) { FATAL("Multiple -C options not supported"); } |
| afl->crash_mode = FSRV_RUN_CRASH; |
| break; |
| |
| case 'n': /* dumb mode */ |
| |
| if (afl->non_instrumented_mode) { |
| |
| FATAL("Multiple -n options not supported"); |
| |
| } |
| |
| if (afl->afl_env.afl_dumb_forksrv) { |
| |
| afl->non_instrumented_mode = 2; |
| |
| } else { |
| |
| afl->non_instrumented_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->fsrv.qemu_mode) { FATAL("Multiple -Q options not supported"); } |
| afl->fsrv.qemu_mode = 1; |
| afl->shmem_testcase_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; |
| afl->shmem_testcase_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->fsrv.qemu_mode = 1; |
| afl->use_wine = 1; |
| afl->shmem_testcase_mode = 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->havoc_max_mult = HAVOC_MAX_MULT_MOPT; |
| |
| if (sscanf(optarg, "%d", &afl->limit_time_puppet) < 1) { |
| |
| FATAL("Bad syntax used for -L"); |
| |
| } |
| |
| if (afl->limit_time_puppet == -1) { |
| |
| afl->limit_time_sig = -1; |
| afl->limit_time_puppet = 0; |
| |
| } else if (afl->limit_time_puppet < 0) { |
| |
| FATAL("-L value must be between 0 and 2000000 or -1"); |
| |
| } else { |
| |
| afl->limit_time_sig = 1; |
| |
| } |
| |
| 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; |
| 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': |
| |
| FATAL( |
| "Radamsa is now a custom mutator, please use that " |
| "(custom_mutators/radamsa/)."); |
| |
| 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); |
| |
| } |
| |
| if (!mem_limit_given && afl->shm.cmplog_mode) afl->fsrv.mem_limit += 260; |
| |
| 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->is_main_node && |
| afl->afl_env.afl_custom_mutator_only) { |
| |
| WARNF( |
| "Using -M main node 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); |
| |
| } |
| |
| #if defined(__SANITIZE_ADDRESS__) |
| if (afl->fsrv.mem_limit) { |
| |
| WARNF("in the ASAN build we disable all memory limits"); |
| afl->fsrv.mem_limit = 0; |
| |
| } |
| |
| #endif |
| |
| 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->non_instrumented_mode) { |
| |
| if (afl->crash_mode) { FATAL("-C and -n are mutually exclusive"); } |
| if (afl->fsrv.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 SEEK: |
| OKF("Using seek power schedule (SEEK)"); |
| 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->non_instrumented_mode == 2 && afl->no_forkserver) { |
| |
| FATAL("AFL_DUMB_FORKSRV and AFL_NO_FORKSRV are mutually exclusive"); |
| |
| } |
| |
| afl->fsrv.use_fauxsrv = afl->non_instrumented_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->fsrv.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 (afl->afl_env.afl_cal_fast) { |
| |
| /* Use less calibration cycles, for slow applications */ |
| afl->cal_cycles = 3; |
| afl->cal_cycles_long = 5; |
| |
| } |
| |
| 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); |
| |
| atexit(at_exit); |
| |
| afl->fsrv.trace_bits = |
| afl_shm_init(&afl->shm, afl->fsrv.map_size, afl->non_instrumented_mode); |
| |
| if (!afl->in_bitmap) { memset(afl->virgin_bits, 255, afl->fsrv.map_size); } |
| memset(afl->virgin_tmout, 255, afl->fsrv.map_size); |
| memset(afl->virgin_crash, 255, afl->fsrv.map_size); |
| |
| init_count_class16(); |
| |
| if (afl->is_main_node && check_main_node_exists(afl) == 1) { |
| |
| WARNF("it is wasteful to run more than one main node!"); |
| sleep(1); |
| |
| } |
| |
| setup_dirs_fds(afl); |
| |
| if (afl->is_secondary_node && check_main_node_exists(afl) == 0) { |
| |
| WARNF("no -M main node found. You need to run one main instance!"); |
| sleep(5); |
| |
| } |
| |
| setup_custom_mutators(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[PATH_MAX]; |
| |
| if (afl->file_extension) { |
| |
| snprintf(tmpfile, PATH_MAX, "%s/.cur_input.%s", afl->tmp_dir, |
| afl->file_extension); |
| |
| } else { |
| |
| snprintf(tmpfile, PATH_MAX, "%s/.cur_input", afl->tmp_dir); |
| |
| } |
| |
| /* there is still a race condition here, but well ... */ |
| if (access(tmpfile, F_OK) != -1) { |
| |
| 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->unicorn_mode) { |
| |
| FATAL("CmpLog and Unicorn mode are not compatible at the moment, sorry"); |
| |
| } |
| |
| if (!afl->fsrv.qemu_mode) { check_binary(afl, afl->cmplog_binary); } |
| |
| } |
| |
| check_binary(afl, argv[optind]); |
| |
| if (afl->shmem_testcase_mode) { setup_testcase_shmem(afl); } |
| |
| afl->start_time = get_cur_time(); |
| |
| if (afl->fsrv.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; |
| |
| if (afl->cmplog_binary) { |
| |
| ACTF("Spawning cmplog forkserver"); |
| afl_fsrv_init_dup(&afl->cmplog_fsrv, &afl->fsrv); |
| // TODO: this is semi-nice |
| afl->cmplog_fsrv.trace_bits = afl->fsrv.trace_bits; |
| afl->cmplog_fsrv.qemu_mode = afl->fsrv.qemu_mode; |
| afl->cmplog_fsrv.cmplog_binary = afl->cmplog_binary; |
| afl->cmplog_fsrv.init_child_func = cmplog_exec_child; |
| afl_fsrv_start(&afl->cmplog_fsrv, afl->argv, &afl->stop_soon, |
| afl->afl_env.afl_debug_child_output); |
| OKF("Cmplog forkserver successfully started"); |
| |
| } |
| |
| 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 (unlikely(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 (unlikely(afl->is_main_node)) { |
| |
| if (!(sync_interval_cnt++ % (SYNC_INTERVAL / 2))) { sync_fuzzers(afl); } |
| |
| } else { |
| |
| 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; |
| |
| } |
| |
| write_bitmap(afl); |
| maybe_update_plot_file(afl, 0, 0); |
| save_auto(afl); |
| |
| stop_fuzzing: |
| |
| write_stats_file(afl, 0, 0, 0); |
| 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); |
| |
| } |
| |
| #ifdef PROFILING |
| SAYF(cYEL "[!] " cRST |
| "Profiling information: %llu ms total work, %llu ns/run\n", |
| time_spent_working / 1000000, |
| time_spent_working / afl->fsrv.total_execs); |
| #endif |
| |
| if (afl->is_main_node) { |
| |
| u8 path[PATH_MAX]; |
| sprintf(path, "%s/is_main_node", afl->out_dir); |
| unlink(path); |
| |
| } |
| |
| fclose(afl->fsrv.plot_file); |
| destroy_queue(afl); |
| destroy_extras(afl); |
| destroy_custom_mutators(afl); |
| unsetenv(SHM_ENV_VAR); |
| unsetenv(CMPLOG_SHM_ENV_VAR); |
| afl_shm_deinit(&afl->shm); |
| |
| if (afl->shm_fuzz) { |
| |
| unsetenv(SHM_FUZZ_ENV_VAR); |
| afl_shm_deinit(afl->shm_fuzz); |
| ck_free(afl->shm_fuzz); |
| |
| } |
| |
| 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); |
| afl_state_deinit(afl); |
| 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 */ |
| |
