/* american fuzzy lop++ - file format analyzer ------------------------------------------- Originally written by Michal Zalewski Now maintained by Marc Heuse , Heiko Eißfeldt and Andrea Fioraldi Copyright 2016, 2017 Google Inc. All rights reserved. Copyright 2019-2024 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: https://www.apache.org/licenses/LICENSE-2.0 A nifty utility that grabs an input file and takes a stab at explaining its structure by observing how changes to it affect the execution path. If the output scrolls past the edge of the screen, pipe it to 'less -r'. */ #define AFL_MAIN #include "config.h" #include "types.h" #include "debug.h" #include "alloc-inl.h" #include "hash.h" #include "sharedmem.h" #include "common.h" #include "forkserver.h" #include #include #include #include #include #include #include #include #include #include #include #include #ifndef USEMMAP #include #endif #include #include #include static u8 *in_file; /* Analyzer input test case */ static u8 *in_data; /* Input data for analysis */ static u32 in_len, /* Input data length */ total_execs, /* Total number of execs */ exec_hangs, /* Total number of hangs */ exec_tmout = EXEC_TIMEOUT; /* Exec timeout (ms) */ static u64 orig_cksum; /* Original checksum */ static u64 mem_limit = MEM_LIMIT; /* Memory limit (MB) */ static bool edges_only, /* Ignore hit counts? */ use_hex_offsets, /* Show hex offsets? */ use_stdin = true; /* Use stdin for program input? */ static volatile u8 stop_soon; /* Ctrl-C pressed? */ static u8 *target_path; static u8 frida_mode; static u8 qemu_mode; static u8 cs_mode; static u32 map_size = MAP_SIZE; static afl_forkserver_t fsrv = {0}; /* The forkserver */ /* Constants used for describing byte behavior. */ #define RESP_NONE 0x00 /* Changing byte is a no-op. */ #define RESP_MINOR 0x01 /* Some changes have no effect. */ #define RESP_VARIABLE 0x02 /* Changes produce variable paths. */ #define RESP_FIXED 0x03 /* Changes produce fixed patterns. */ #define RESP_LEN 0x04 /* Potential length field */ #define RESP_CKSUM 0x05 /* Potential checksum */ #define RESP_SUSPECT 0x06 /* Potential "suspect" blob */ /* Classify tuple counts. This is a slow & naive version, but good enough here. */ static u8 count_class_lookup[256] = { [0] = 0, [1] = 1, [2] = 2, [3] = 4, [4 ... 7] = 8, [8 ... 15] = 16, [16 ... 31] = 32, [32 ... 127] = 64, [128 ... 255] = 128 }; static void kill_child() { if (fsrv.child_pid > 0) { kill(fsrv.child_pid, fsrv.child_kill_signal); fsrv.child_pid = -1; } } static void classify_counts(u8 *mem, u32 mem_size) { u32 i = mem_size; if (edges_only) { while (i--) { if (*mem) { *mem = 1; } mem++; } } else { while (i--) { *mem = count_class_lookup[*mem]; mem++; } } } /* See if any bytes are set in the bitmap. */ static inline u8 anything_set(void) { u32 *ptr = (u32 *)fsrv.trace_bits; u32 i = (map_size >> 2); while (i--) { if (*(ptr++)) { return 1; } } return 0; } /* Get rid of temp files (atexit handler). */ static void at_exit_handler(void) { unlink(fsrv.out_file); /* Ignore errors */ } /* Read initial file. */ static void read_initial_file(void) { struct stat st; s32 fd = open(in_file, O_RDONLY); if (fd < 0) { PFATAL("Unable to open '%s'", in_file); } if (fstat(fd, &st) || !st.st_size) { FATAL("Zero-sized input file."); } if (st.st_size >= TMIN_MAX_FILE) { FATAL("Input file is too large (%ld MB max)", TMIN_MAX_FILE / 1024 / 1024); } in_len = st.st_size; in_data = ck_alloc_nozero(in_len); ck_read(fd, in_data, in_len, in_file); close(fd); OKF("Read %u byte%s from '%s'.", in_len, in_len == 1 ? "" : "s", in_file); } /* Execute target application. Returns exec checksum, or 0 if program times out. */ static u64 analyze_run_target(u8 *mem, u32 len, u8 first_run) { afl_fsrv_write_to_testcase(&fsrv, mem, len); fsrv_run_result_t ret = afl_fsrv_run_target(&fsrv, exec_tmout, &stop_soon); if (ret == FSRV_RUN_ERROR) { FATAL("Error in forkserver"); } else if (ret == FSRV_RUN_NOINST) { FATAL("Target not instrumented"); } else if (ret == FSRV_RUN_NOBITS) { FATAL("Failed to run target"); } classify_counts(fsrv.trace_bits, fsrv.map_size); total_execs++; if (stop_soon) { SAYF(cRST cLRD "\n+++ Analysis aborted by user +++\n" cRST); exit(1); } /* Always discard inputs that time out. */ if (fsrv.last_run_timed_out) { exec_hangs++; return 0; } u64 cksum = hash64(fsrv.trace_bits, fsrv.map_size, HASH_CONST); if (ret == FSRV_RUN_CRASH) { /* We don't actually care if the target is crashing or not, except that when it does, the checksum should be different. */ cksum ^= 0xffffffff; } if (first_run) { orig_cksum = cksum; } return cksum; } #ifdef USE_COLOR /* Helper function to display a human-readable character. */ static void show_char(u8 val) { switch (val) { case 0 ... 32: case 127 ... 255: SAYF("#%02x", val); break; default: SAYF(" %c ", val); } } /* Show the legend */ static void show_legend(void) { SAYF(" " cLGR bgGRA " 01 " cRST " - no-op block " cBLK bgLGN " 01 " cRST " - suspected length field\n" " " cBRI bgGRA " 01 " cRST " - superficial content " cBLK bgYEL " 01 " cRST " - suspected cksum or magic int\n" " " cBLK bgCYA " 01 " cRST " - critical stream " cBLK bgLRD " 01 " cRST " - suspected checksummed block\n" " " cBLK bgMGN " 01 " cRST " - \"magic value\" section\n\n"); } #endif /* USE_COLOR */ /* Interpret and report a pattern in the input file. */ static void dump_hex(u32 len, u8 *b_data) { u32 i; for (i = 0; i < len; i++) { #ifdef USE_COLOR u32 rlen = 1, off; #else u32 rlen = 1; #endif /* ^USE_COLOR */ u8 rtype = b_data[i] & 0x0f; /* Look ahead to determine the length of run. */ while (i + rlen < len && (b_data[i] >> 7) == (b_data[i + rlen] >> 7)) { if (rtype < (b_data[i + rlen] & 0x0f)) { rtype = b_data[i + rlen] & 0x0f; } rlen++; } /* Try to do some further classification based on length & value. */ if (rtype == RESP_FIXED) { switch (rlen) { case 2: { u16 val = *(u16 *)(in_data + i); /* Small integers may be length fields. */ if (val && (val <= in_len || SWAP16(val) <= in_len)) { rtype = RESP_LEN; break; } /* Uniform integers may be checksums. */ if (val && abs(in_data[i] - in_data[i + 1]) > 32) { rtype = RESP_CKSUM; break; } break; } case 4: { u32 val = *(u32 *)(in_data + i); /* Small integers may be length fields. */ if (val && (val <= in_len || SWAP32(val) <= in_len)) { rtype = RESP_LEN; break; } /* Uniform integers may be checksums. */ if (val && (in_data[i] >> 7 != in_data[i + 1] >> 7 || in_data[i] >> 7 != in_data[i + 2] >> 7 || in_data[i] >> 7 != in_data[i + 3] >> 7)) { rtype = RESP_CKSUM; break; } break; } case 1: case 3: case 5 ... MAX_AUTO_EXTRA - 1: break; default: rtype = RESP_SUSPECT; } } /* Print out the entire run. */ #ifdef USE_COLOR for (off = 0; off < rlen; off++) { /* Every 16 digits, display offset. */ if (!((i + off) % 16)) { if (off) { SAYF(cRST cLCY ">"); } if (use_hex_offsets) { SAYF(cRST cGRA "%s[%06x] " cRST, (i + off) ? "\n" : "", i + off); } else { SAYF(cRST cGRA "%s[%06u] " cRST, (i + off) ? "\n" : "", i + off); } } switch (rtype) { case RESP_NONE: SAYF(cLGR bgGRA); break; case RESP_MINOR: SAYF(cBRI bgGRA); break; case RESP_VARIABLE: SAYF(cBLK bgCYA); break; case RESP_FIXED: SAYF(cBLK bgMGN); break; case RESP_LEN: SAYF(cBLK bgLGN); break; case RESP_CKSUM: SAYF(cBLK bgYEL); break; case RESP_SUSPECT: SAYF(cBLK bgLRD); break; } show_char(in_data[i + off]); if (off != rlen - 1 && (i + off + 1) % 16) { SAYF(" "); } else { SAYF(cRST " "); } } #else if (use_hex_offsets) SAYF(" Offset %x, length %u: ", i, rlen); else SAYF(" Offset %u, length %u: ", i, rlen); switch (rtype) { case RESP_NONE: SAYF("no-op block\n"); break; case RESP_MINOR: SAYF("superficial content\n"); break; case RESP_VARIABLE: SAYF("critical stream\n"); break; case RESP_FIXED: SAYF("\"magic value\" section\n"); break; case RESP_LEN: SAYF("suspected length field\n"); break; case RESP_CKSUM: SAYF("suspected cksum or magic int\n"); break; case RESP_SUSPECT: SAYF("suspected checksummed block\n"); break; } #endif /* ^USE_COLOR */ i += rlen - 1; } #ifdef USE_COLOR SAYF(cRST "\n"); #endif /* USE_COLOR */ } /* Actually analyze! */ static void analyze() { u32 i; u32 boring_len = 0, prev_xff = 0, prev_x01 = 0, prev_s10 = 0, prev_a10 = 0; u8 *b_data = ck_alloc(in_len + 1); u8 seq_byte = 0; b_data[in_len] = 0xff; /* Intentional terminator. */ ACTF("Analyzing input file (this may take a while)...\n"); #ifdef USE_COLOR show_legend(); #endif /* USE_COLOR */ for (i = 0; i < in_len; i++) { u64 xor_ff, xor_01, sub_10, add_10; u8 xff_orig, x01_orig, s10_orig, a10_orig; /* Perform walking byte adjustments across the file. We perform four operations designed to elicit some response from the underlying code. */ in_data[i] ^= 0xff; xor_ff = analyze_run_target(in_data, in_len, 0); in_data[i] ^= 0xfe; xor_01 = analyze_run_target(in_data, in_len, 0); in_data[i] = (in_data[i] ^ 0x01) - 0x10; sub_10 = analyze_run_target(in_data, in_len, 0); in_data[i] += 0x20; add_10 = analyze_run_target(in_data, in_len, 0); in_data[i] -= 0x10; /* Classify current behavior. */ xff_orig = (xor_ff == orig_cksum); x01_orig = (xor_01 == orig_cksum); s10_orig = (sub_10 == orig_cksum); a10_orig = (add_10 == orig_cksum); if (xff_orig && x01_orig && s10_orig && a10_orig) { b_data[i] = RESP_NONE; boring_len++; } else if (xff_orig || x01_orig || s10_orig || a10_orig) { b_data[i] = RESP_MINOR; boring_len++; } else if (xor_ff == xor_01 && xor_ff == sub_10 && xor_ff == add_10) { b_data[i] = RESP_FIXED; } else { b_data[i] = RESP_VARIABLE; } /* When all checksums change, flip most significant bit of b_data. */ if (prev_xff != xor_ff && prev_x01 != xor_01 && prev_s10 != sub_10 && prev_a10 != add_10) { seq_byte ^= 0x80; } b_data[i] |= seq_byte; prev_xff = xor_ff; prev_x01 = xor_01; prev_s10 = sub_10; prev_a10 = add_10; } dump_hex(in_len, b_data); SAYF("\n"); OKF("Analysis complete. Interesting bits: %0.02f%% of the input file.", 100.0 - ((double)boring_len * 100) / in_len); if (exec_hangs) { WARNF(cLRD "Encountered %u timeouts - results may be skewed." cRST, exec_hangs); } ck_free(b_data); } /* Handle Ctrl-C and the like. */ static void handle_stop_sig(int sig) { (void)sig; stop_soon = 1; afl_fsrv_killall(); } /* Do basic preparations - persistent fds, filenames, etc. */ static void set_up_environment(char **argv) { u8 *x; char *afl_preload; char *frida_afl_preload = NULL; fsrv.dev_null_fd = open("/dev/null", O_RDWR); if (fsrv.dev_null_fd < 0) { PFATAL("Unable to open /dev/null"); } if (!fsrv.out_file) { u8 *use_dir = "."; if (access(use_dir, R_OK | W_OK | X_OK)) { use_dir = get_afl_env("TMPDIR"); if (!use_dir) { use_dir = "/tmp"; } } fsrv.out_file = alloc_printf("%s/.afl-analyze-temp-%u", use_dir, (u32)getpid()); } unlink(fsrv.out_file); fsrv.out_fd = open(fsrv.out_file, O_RDWR | O_CREAT | O_EXCL, DEFAULT_PERMISSION); if (fsrv.out_fd < 0) { PFATAL("Unable to create '%s'", fsrv.out_file); } /* Set sane defaults... */ x = get_afl_env("MSAN_OPTIONS"); if (x) { if (!strstr(x, "exit_code=" STRINGIFY(MSAN_ERROR))) { FATAL("Custom MSAN_OPTIONS set without exit_code=" STRINGIFY( MSAN_ERROR) " - please fix!"); } } set_sanitizer_defaults(); if (get_afl_env("AFL_PRELOAD")) { if (qemu_mode) { /* afl-qemu-trace takes care of converting AFL_PRELOAD. */ } else if (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 { /* CoreSight mode uses the default behavior. */ setenv("LD_PRELOAD", getenv("AFL_PRELOAD"), 1); setenv("DYLD_INSERT_LIBRARIES", getenv("AFL_PRELOAD"), 1); } } else if (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 (frida_afl_preload) { ck_free(frida_afl_preload); } } /* Setup signal handlers, duh. */ static void setup_signal_handlers(void) { struct sigaction sa; sa.sa_handler = NULL; #ifdef SA_RESTART sa.sa_flags = SA_RESTART; #else sa.sa_flags = 0; #endif sa.sa_sigaction = NULL; sigemptyset(&sa.sa_mask); /* Various ways of saying "stop". */ sa.sa_handler = handle_stop_sig; sigaction(SIGHUP, &sa, NULL); sigaction(SIGINT, &sa, NULL); sigaction(SIGTERM, &sa, NULL); } /* Display usage hints. */ static void usage(u8 *argv0) { SAYF( "\n%s [ options ] -- /path/to/target_app [ ... ]\n\n" "Required parameters:\n" " -i file - input test case to be analyzed by the tool\n\n" "Execution control settings:\n" " -f file - input file read by the tested program (stdin)\n" " -t msec - timeout for each run (%u ms)\n" " -m megs - memory limit for child process (%u MB)\n" #if defined(__linux__) && defined(__aarch64__) " -A - use binary-only instrumentation (ARM CoreSight mode)\n" #endif " -O - use binary-only instrumentation (FRIDA mode)\n" #if defined(__linux__) " -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" " -X - use Nyx mode\n" #endif "\n" "Analysis settings:\n" " -e - look for edge coverage only, ignore hit counts\n\n" "For additional tips, please consult %s/README.md.\n\n" "Environment variables used:\n" "TMPDIR: directory to use for temporary input files\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_ANALYZE_HEX: print file offsets in hexadecimal instead of decimal\n" "AFL_KILL_SIGNAL: Signal ID delivered to child processes on timeout, etc.\n" " (default: SIGKILL)\n" "AFL_FORK_SERVER_KILL_SIGNAL: Kill signal for the fork server on termination\n" " (default: SIGTERM). If unset and AFL_KILL_SIGNAL is\n" " set, that value will be used.\n" "AFL_MAP_SIZE: the shared memory size for that target. must be >= the size\n" " the target was compiled for\n" "AFL_PRELOAD: LD_PRELOAD / DYLD_INSERT_LIBRARIES settings for target\n" "AFL_SKIP_BIN_CHECK: skip checking the location of and the target\n" , argv0, EXEC_TIMEOUT, MEM_LIMIT, doc_path); exit(1); } /* Main entry point */ int main(int argc, char **argv_orig, char **envp) { s32 opt; u8 mem_limit_given = 0, timeout_given = 0, unicorn_mode = 0, use_wine = 0; char **use_argv; char **argv = argv_cpy_dup(argc, argv_orig); doc_path = access(DOC_PATH, F_OK) ? "docs" : DOC_PATH; SAYF(cCYA "afl-analyze" VERSION cRST " by Michal Zalewski\n"); afl_fsrv_init(&fsrv); while ((opt = getopt(argc, argv, "+i:f:m:t:eAOQUWXYh")) > 0) { switch (opt) { case 'i': if (in_file) { FATAL("Multiple -i options not supported"); } in_file = optarg; break; case 'f': if (fsrv.out_file) { FATAL("Multiple -f options not supported"); } fsrv.use_stdin = 0; fsrv.out_file = ck_strdup(optarg); break; case 'e': if (edges_only) { FATAL("Multiple -e options not supported"); } edges_only = 1; break; case 'm': { 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")) { mem_limit = 0; fsrv.mem_limit = 0; break; } if (sscanf(optarg, "%llu%c", &mem_limit, &suffix) < 1 || optarg[0] == '-') { FATAL("Bad syntax used for -m"); } switch (suffix) { case 'T': mem_limit *= 1024 * 1024; break; case 'G': mem_limit *= 1024; break; case 'k': mem_limit /= 1024; break; case 'M': break; default: FATAL("Unsupported suffix or bad syntax for -m"); } if (mem_limit < 5) { FATAL("Dangerously low value of -m"); } if (sizeof(rlim_t) == 4 && mem_limit > 2000) { FATAL("Value of -m out of range on 32-bit systems"); } fsrv.mem_limit = mem_limit; } break; case 't': if (timeout_given) { FATAL("Multiple -t options not supported"); } timeout_given = 1; if (!optarg) { FATAL("Wrong usage of -t"); } exec_tmout = atoi(optarg); if (exec_tmout < 10 || optarg[0] == '-') { FATAL("Dangerously low value of -t"); } fsrv.exec_tmout = exec_tmout; break; case 'A': /* CoreSight mode */ #if !defined(__aarch64__) || !defined(__linux__) FATAL("-A option is not supported on this platform"); #endif if (cs_mode) { FATAL("Multiple -A options not supported"); } cs_mode = 1; fsrv.cs_mode = cs_mode; break; case 'O': /* FRIDA mode */ if (frida_mode) { FATAL("Multiple -O options not supported"); } frida_mode = 1; fsrv.frida_mode = frida_mode; setenv("AFL_FRIDA_INST_SEED", "1", 1); break; case 'Q': if (qemu_mode) { FATAL("Multiple -Q options not supported"); } if (!mem_limit_given) { mem_limit = MEM_LIMIT_QEMU; } qemu_mode = 1; fsrv.mem_limit = mem_limit; fsrv.qemu_mode = qemu_mode; break; case 'U': if (unicorn_mode) { FATAL("Multiple -U options not supported"); } if (!mem_limit_given) { mem_limit = MEM_LIMIT_UNICORN; } unicorn_mode = 1; fsrv.mem_limit = mem_limit; break; case 'W': /* Wine+QEMU mode */ if (use_wine) { FATAL("Multiple -W options not supported"); } qemu_mode = 1; use_wine = 1; if (!mem_limit_given) { mem_limit = 0; } fsrv.qemu_mode = qemu_mode; fsrv.mem_limit = mem_limit; break; case 'Y': // fallthough #ifdef __linux__ case 'X': /* NYX mode */ if (fsrv.nyx_mode) { FATAL("Multiple -X options not supported"); } fsrv.nyx_mode = 1; fsrv.nyx_parent = true; fsrv.nyx_standalone = true; break; #else case 'X': FATAL("Nyx mode is only availabe on linux..."); break; #endif case 'h': usage(argv[0]); return -1; break; default: usage(argv[0]); } } if (optind == argc || !in_file) { usage(argv[0]); } map_size = get_map_size(); fsrv.map_size = map_size; use_hex_offsets = !!get_afl_env("AFL_ANALYZE_HEX"); check_environment_vars(envp); sharedmem_t shm = {0}; /* initialize cmplog_mode */ shm.cmplog_mode = 0; atexit(at_exit_handler); setup_signal_handlers(); set_up_environment(argv); #ifdef __linux__ if (!fsrv.nyx_mode) { fsrv.target_path = find_binary(argv[optind]); } else { fsrv.target_path = ck_strdup(argv[optind]); } #else fsrv.target_path = find_binary(argv[optind]); #endif fsrv.trace_bits = afl_shm_init(&shm, map_size, 0); detect_file_args(argv + optind, fsrv.out_file, &use_stdin); signal(SIGALRM, kill_child); if (qemu_mode) { if (use_wine) { use_argv = get_wine_argv(argv[0], &target_path, argc - optind, argv + optind); } else { use_argv = get_qemu_argv(argv[0], &target_path, argc - optind, argv + optind); } } else if (cs_mode) { use_argv = get_cs_argv(argv[0], &target_path, argc - optind, argv + optind); #ifdef __linux__ } else if (fsrv.nyx_mode) { fsrv.nyx_id = 0; u8 *libnyx_binary = find_afl_binary(argv[0], "libnyx.so"); fsrv.nyx_handlers = afl_load_libnyx_plugin(libnyx_binary); if (fsrv.nyx_handlers == NULL) { FATAL("failed to initialize libnyx.so..."); } fsrv.nyx_use_tmp_workdir = true; fsrv.nyx_bind_cpu_id = 0; use_argv = argv + optind; #endif } else { use_argv = argv + optind; } SAYF("\n"); if (getenv("AFL_FORKSRV_INIT_TMOUT")) { s32 forksrv_init_tmout = atoi(getenv("AFL_FORKSRV_INIT_TMOUT")); if (forksrv_init_tmout < 1) { FATAL("Bad value specified for AFL_FORKSRV_INIT_TMOUT"); } fsrv.init_tmout = (u32)forksrv_init_tmout; } configure_afl_kill_signals( &fsrv, NULL, NULL, (fsrv.qemu_mode || unicorn_mode) ? SIGKILL : SIGTERM); read_initial_file(); #ifdef __linux__ if (!fsrv.nyx_mode) { (void)check_binary_signatures(fsrv.target_path); } #else (void)check_binary_signatures(fsrv.target_path); #endif ACTF("Performing dry run (mem limit = %llu MB, timeout = %u ms%s)...", mem_limit, exec_tmout, edges_only ? ", edges only" : ""); afl_fsrv_start(&fsrv, use_argv, &stop_soon, false); analyze_run_target(in_data, in_len, 1); if (fsrv.last_run_timed_out) { FATAL("Target binary times out (adjusting -t may help)."); } if (get_afl_env("AFL_SKIP_BIN_CHECK") == NULL && !anything_set()) { FATAL("No instrumentation detected."); } analyze(); OKF("We're done here. Have a nice day!\n"); afl_shm_deinit(&shm); afl_fsrv_deinit(&fsrv); if (fsrv.target_path) { ck_free(fsrv.target_path); } if (in_data) { ck_free(in_data); } exit(0); }