diff options
Diffstat (limited to 'src/afl-fuzz.c')
| -rw-r--r-- | src/afl-fuzz.c | 158 |
1 files changed, 138 insertions, 20 deletions
diff --git a/src/afl-fuzz.c b/src/afl-fuzz.c index d70ffd31..3606533d 100644 --- a/src/afl-fuzz.c +++ b/src/afl-fuzz.c @@ -109,6 +109,7 @@ static void usage(u8 *argv0, int more_help) { "maximum.\n" " -m megs - memory limit for child process (%u MB, 0 = no limit " "[default])\n" + " -O - use binary-only instrumentation (FRIDA mode)\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 " @@ -126,7 +127,7 @@ static void usage(u8 *argv0, int more_help) { "it.\n" " if using QEMU, just use -c 0.\n" " -l cmplog_opts - CmpLog configuration values (e.g. \"2AT\"):\n" - " 1=small files (default), 2=larger files, 3=all " + " 1=small files, 2=larger files (default), 3=all " "files,\n" " A=arithmetic solving, T=transformational solving.\n\n" "Fuzzing behavior settings:\n" @@ -175,6 +176,14 @@ static void usage(u8 *argv0, int more_help) { #define DYN_COLOR #endif +#ifdef AFL_PERSISTENT_RECORD + #define PERSISTENT_MSG \ + "AFL_PERSISTENT_RECORD: record the last X inputs to every crash in " \ + "out/crashes\n" +#else + #define PERSISTENT_MSG +#endif + SAYF( "Environment variables used:\n" "LD_BIND_LAZY: do not set LD_BIND_NOW env var for target\n" @@ -222,6 +231,9 @@ static void usage(u8 *argv0, int more_help) { "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" + + PERSISTENT_MSG + "AFL_PRELOAD: LD_PRELOAD / DYLD_INSERT_LIBRARIES settings for target\n" "AFL_TARGET_ENV: pass extra environment variables to target\n" "AFL_SHUFFLE_QUEUE: reorder the input queue randomly on startup\n" @@ -253,7 +265,13 @@ static void usage(u8 *argv0, int more_help) { SAYF("Compiled with %s module support, see docs/custom_mutator.md\n", (char *)PYTHON_VERSION); #else - SAYF("Compiled without python module support\n"); + SAYF("Compiled without python module support.\n"); +#endif + +#ifdef AFL_PERSISTENT_RECORD + SAYF("Compiled with AFL_PERSISTENT_RECORD support.\n"); +#else + SAYF("Compiled without AFL_PERSISTENT_RECORD support.\n"); #endif #ifdef USEMMAP @@ -263,27 +281,27 @@ static void usage(u8 *argv0, int more_help) { #endif #ifdef ASAN_BUILD - SAYF("Compiled with ASAN_BUILD\n\n"); + SAYF("Compiled with ASAN_BUILD.\n"); #endif #ifdef NO_SPLICING - SAYF("Compiled with NO_SPLICING\n\n"); + SAYF("Compiled with NO_SPLICING.\n"); #endif #ifdef PROFILING - SAYF("Compiled with PROFILING\n\n"); + SAYF("Compiled with PROFILING.\n"); #endif #ifdef INTROSPECTION - SAYF("Compiled with INTROSPECTION\n\n"); + SAYF("Compiled with INTROSPECTION.\n"); #endif #ifdef _DEBUG - SAYF("Compiled with _DEBUG\n\n"); + SAYF("Compiled with _DEBUG.\n"); #endif #ifdef _AFL_DOCUMENT_MUTATIONS - SAYF("Compiled with _AFL_DOCUMENT_MUTATIONS\n\n"); + SAYF("Compiled with _AFL_DOCUMENT_MUTATIONS.\n"); #endif SAYF("For additional help please consult %s/README.md :)\n\n", doc_path); @@ -320,6 +338,8 @@ int main(int argc, char **argv_orig, char **envp) { u8 *extras_dir[4]; u8 mem_limit_given = 0, exit_1 = 0, debug = 0, extras_dir_cnt = 0 /*, have_p = 0*/; + char * afl_preload; + char * frida_afl_preload = NULL; char **use_argv; struct timeval tv; @@ -363,7 +383,7 @@ int main(int argc, char **argv_orig, char **envp) { while ((opt = getopt( argc, argv, - "+b:B:c:CdDe:E:hi:I:f:F:l:L:m:M:nNo:p:RQs:S:t:T:UV:Wx:Z")) > 0) { + "+b:B:c:CdDe:E:hi:I:f:F:l:L:m:M:nNOo:p:RQs:S:t:T:UV:Wx:Z")) > 0) { switch (opt) { @@ -755,6 +775,18 @@ int main(int argc, char **argv_orig, char **envp) { afl->use_banner = optarg; break; + case 'O': /* FRIDA mode */ + + if (afl->fsrv.frida_mode) { + + FATAL("Multiple -O options not supported"); + + } + + afl->fsrv.frida_mode = 1; + + break; + case 'Q': /* QEMU mode */ if (afl->fsrv.qemu_mode) { FATAL("Multiple -Q options not supported"); } @@ -831,6 +863,14 @@ int main(int argc, char **argv_orig, char **envp) { break; case '3': afl->cmplog_lvl = 3; + + if (!afl->disable_trim) { + + ACTF("Deactivating trimming due CMPLOG level 3"); + afl->disable_trim = 1; + + } + break; case 'a': case 'A': @@ -1023,6 +1063,30 @@ int main(int argc, char **argv_orig, char **envp) { } + if (unlikely(afl->afl_env.afl_persistent_record)) { + + #ifdef AFL_PERSISTENT_RECORD + + afl->fsrv.persistent_record = atoi(afl->afl_env.afl_persistent_record); + + if (afl->fsrv.persistent_record < 2) { + + FATAL( + "AFL_PERSISTENT_RECORD value must be be at least 2, recommended is " + "100 or 1000."); + + } + + #else + + FATAL( + "afl-fuzz was not compiled with AFL_PERSISTENT_RECORD enabled in " + "config.h!"); + + #endif + + } + if (afl->fsrv.mem_limit && afl->shm.cmplog_mode) afl->fsrv.mem_limit += 260; OKF("afl++ is maintained by Marc \"van Hauser\" Heuse, Heiko \"hexcoder\" " @@ -1085,6 +1149,7 @@ int main(int argc, char **argv_orig, char **envp) { if (afl->non_instrumented_mode) { if (afl->crash_mode) { FATAL("-C and -n are mutually exclusive"); } + if (afl->fsrv.frida_mode) { FATAL("-O 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"); } @@ -1289,6 +1354,25 @@ int main(int argc, char **argv_orig, char **envp) { /* afl-qemu-trace takes care of converting AFL_PRELOAD. */ + } else if (afl->fsrv.frida_mode) { + + afl_preload = getenv("AFL_PRELOAD"); + u8 *frida_binary = find_afl_binary(argv[0], "afl-frida-trace.so"); + if (afl_preload) { + + frida_afl_preload = alloc_printf("%s:%s", afl_preload, frida_binary); + + } else { + + frida_afl_preload = alloc_printf("%s", frida_binary); + + } + + ck_free(frida_binary); + + setenv("LD_PRELOAD", frida_afl_preload, 1); + setenv("DYLD_INSERT_LIBRARIES", frida_afl_preload, 1); + } else { setenv("LD_PRELOAD", getenv("AFL_PRELOAD"), 1); @@ -1296,6 +1380,13 @@ int main(int argc, char **argv_orig, char **envp) { } + } else if (afl->fsrv.frida_mode) { + + u8 *frida_binary = find_afl_binary(argv[0], "afl-frida-trace.so"); + setenv("LD_PRELOAD", frida_binary, 1); + setenv("DYLD_INSERT_LIBRARIES", frida_binary, 1); + ck_free(frida_binary); + } if (getenv("AFL_LD_PRELOAD")) { @@ -1479,7 +1570,8 @@ int main(int argc, char **argv_orig, char **envp) { } - if (!afl->fsrv.qemu_mode && !afl->non_instrumented_mode) { + if (!afl->fsrv.qemu_mode && !afl->fsrv.frida_mode && + !afl->non_instrumented_mode) { check_binary(afl, afl->cmplog_binary); @@ -1489,6 +1581,23 @@ int main(int argc, char **argv_orig, char **envp) { check_binary(afl, argv[optind]); + #ifdef AFL_PERSISTENT_RECORD + if (unlikely(afl->fsrv.persistent_record)) { + + if (!getenv(PERSIST_ENV_VAR)) { + + FATAL( + "Target binary is not compiled in persistent mode, " + "AFL_PERSISTENT_RECORD makes no sense."); + + } + + afl->fsrv.persistent_record_dir = alloc_printf("%s/crashes", afl->out_dir); + + } + + #endif + if (afl->shmem_testcase_mode) { setup_testcase_shmem(afl); } afl->start_time = get_cur_time(); @@ -1513,7 +1622,8 @@ int main(int argc, char **argv_orig, char **envp) { } - if (afl->non_instrumented_mode || afl->fsrv.qemu_mode || afl->unicorn_mode) { + if (afl->non_instrumented_mode || afl->fsrv.qemu_mode || + afl->fsrv.frida_mode || afl->unicorn_mode) { map_size = afl->fsrv.map_size = MAP_SIZE; afl->virgin_bits = ck_realloc(afl->virgin_bits, map_size); @@ -1773,6 +1883,14 @@ int main(int argc, char **argv_orig, char **envp) { runs_in_current_cycle > afl->queued_paths) || (afl->old_seed_selection && !afl->queue_cur))) { + if (unlikely((afl->last_sync_cycle < afl->queue_cycle || + (!afl->queue_cycle && afl->afl_env.afl_import_first)) && + afl->sync_id)) { + + sync_fuzzers(afl); + + } + ++afl->queue_cycle; runs_in_current_cycle = (u32)-1; afl->cur_skipped_paths = 0; @@ -1886,6 +2004,13 @@ int main(int argc, char **argv_orig, char **envp) { } + #ifdef INTROSPECTION + fprintf(afl->introspection_file, + "CYCLE cycle=%llu cycle_wo_finds=%llu expand_havoc=%u queue=%u\n", + afl->queue_cycle, afl->cycles_wo_finds, afl->expand_havoc, + afl->queued_paths); + #endif + if (afl->cycle_schedules) { /* we cannot mix non-AFLfast schedules with others */ @@ -1937,13 +2062,6 @@ int main(int argc, char **argv_orig, char **envp) { prev_queued = afl->queued_paths; - if (afl->sync_id && afl->queue_cycle == 1 && - afl->afl_env.afl_import_first) { - - sync_fuzzers(afl); - - } - } ++runs_in_current_cycle; @@ -2023,12 +2141,10 @@ int main(int argc, char **argv_orig, char **envp) { } write_bitmap(afl); - maybe_update_plot_file(afl, 0, 0, 0); save_auto(afl); stop_fuzzing: - write_stats_file(afl, 0, 0, 0, 0); afl->force_ui_update = 1; // ensure the screen is reprinted show_stats(afl); // print the screen one last time @@ -2074,6 +2190,8 @@ stop_fuzzing: } + if (frida_afl_preload) { ck_free(frida_afl_preload); } + fclose(afl->fsrv.plot_file); destroy_queue(afl); destroy_extras(afl); |