diff options
Diffstat (limited to 'src/afl-fuzz-init.c')
| -rw-r--r-- | src/afl-fuzz-init.c | 216 |
1 files changed, 138 insertions, 78 deletions
diff --git a/src/afl-fuzz-init.c b/src/afl-fuzz-init.c index dbffa4f9..40ba20c7 100644 --- a/src/afl-fuzz-init.c +++ b/src/afl-fuzz-init.c @@ -25,6 +25,7 @@ #include "afl-fuzz.h" #include <limits.h> +#include "cmplog.h" #ifdef HAVE_AFFINITY @@ -460,6 +461,7 @@ void read_foreign_testcases(afl_state_t *afl, int first) { u32 i, iter; u8 val_buf[2][STRINGIFY_VAL_SIZE_MAX]; + u8 foreign_name[16]; for (iter = 0; iter < afl->foreign_sync_cnt; iter++) { @@ -467,11 +469,22 @@ void read_foreign_testcases(afl_state_t *afl, int first) { afl->foreign_syncs[iter].dir[0] != 0) { if (first) ACTF("Scanning '%s'...", afl->foreign_syncs[iter].dir); - time_t ctime_max = 0; + time_t mtime_max = 0; + u8 * name = strrchr(afl->foreign_syncs[iter].dir, '/'); + if (!name) { name = afl->foreign_syncs[iter].dir; } + if (!strcmp(name, "queue") || !strcmp(name, "out") || + !strcmp(name, "default")) { - /* We use scandir() + alphasort() rather than readdir() because otherwise, - the ordering of test cases would vary somewhat randomly and would be - difficult to control. */ + snprintf(foreign_name, sizeof(foreign_name), "foreign_%u", iter); + + } else { + + snprintf(foreign_name, sizeof(foreign_name), "%s_%u", name, iter); + + } + + /* We do not use sorting yet and do a more expensive mtime check instead. + a mtimesort() implementation would be better though. */ nl_cnt = scandir(afl->foreign_syncs[iter].dir, &nl, NULL, NULL); @@ -525,8 +538,8 @@ void read_foreign_testcases(afl_state_t *afl, int first) { } - /* we detect new files by their ctime */ - if (likely(st.st_ctime <= afl->foreign_syncs[iter].ctime)) { + /* we detect new files by their mtime */ + if (likely(st.st_mtime <= afl->foreign_syncs[iter].mtime)) { ck_free(fn2); continue; @@ -581,18 +594,18 @@ void read_foreign_testcases(afl_state_t *afl, int first) { write_to_testcase(afl, mem, st.st_size); fault = fuzz_run_target(afl, &afl->fsrv, afl->fsrv.exec_tmout); - afl->syncing_party = "foreign"; + afl->syncing_party = foreign_name; afl->queued_imported += save_if_interesting(afl, mem, st.st_size, fault); afl->syncing_party = 0; munmap(mem, st.st_size); close(fd); - if (st.st_ctime > ctime_max) ctime_max = st.st_ctime; + if (st.st_mtime > mtime_max) mtime_max = st.st_mtime; } - afl->foreign_syncs[iter].ctime = ctime_max; + afl->foreign_syncs[iter].mtime = mtime_max; free(nl); /* not tracked */ } @@ -729,14 +742,41 @@ void read_testcases(afl_state_t *afl, u8 *directory) { add_to_queue(afl, fn2, st.st_size >= MAX_FILE ? MAX_FILE : st.st_size, passed_det); - if (unlikely(afl->schedule >= FAST && afl->schedule <= RARE)) { + if (unlikely(afl->shm.cmplog_mode)) { + + if (afl->cmplog_lvl == 1) { + + if (!afl->cmplog_max_filesize || + afl->cmplog_max_filesize < st.st_size) { + + afl->cmplog_max_filesize = st.st_size; - u64 cksum = hash64(afl->fsrv.trace_bits, afl->fsrv.map_size, HASH_CONST); - afl->queue_top->n_fuzz_entry = cksum % N_FUZZ_SIZE; - afl->n_fuzz[afl->queue_top->n_fuzz_entry] = 1; + } + + } else if (afl->cmplog_lvl == 2) { + + if (!afl->cmplog_max_filesize || + afl->cmplog_max_filesize > st.st_size) { + + afl->cmplog_max_filesize = st.st_size; + + } + + } } + /* + if (unlikely(afl->schedule >= FAST && afl->schedule <= RARE)) { + + u64 cksum = hash64(afl->fsrv.trace_bits, afl->fsrv.map_size, + HASH_CONST); afl->queue_top->n_fuzz_entry = cksum % N_FUZZ_SIZE; + afl->n_fuzz[afl->queue_top->n_fuzz_entry] = 1; + + } + + */ + } free(nl); /* not tracked */ @@ -756,6 +796,20 @@ void read_testcases(afl_state_t *afl, u8 *directory) { } + if (unlikely(afl->shm.cmplog_mode)) { + + if (afl->cmplog_max_filesize < 1024) { + + afl->cmplog_max_filesize = 1024; + + } else { + + afl->cmplog_max_filesize = (((afl->cmplog_max_filesize >> 10) + 1) << 10); + + } + + } + afl->last_path_time = 0; afl->queued_at_start = afl->queued_paths; @@ -766,13 +820,16 @@ void read_testcases(afl_state_t *afl, u8 *directory) { void perform_dry_run(afl_state_t *afl) { - struct queue_entry *q = afl->queue; - u32 cal_failures = 0; + struct queue_entry *q; + u32 cal_failures = 0, idx; u8 * skip_crashes = afl->afl_env.afl_skip_crashes; + u8 * use_mem; - while (q) { + for (idx = 0; idx < afl->queued_paths; idx++) { + + q = afl->queue_buf[idx]; + if (unlikely(q->disabled)) { continue; } - u8 use_mem[MAX_FILE]; u8 res; s32 fd; @@ -783,6 +840,8 @@ void perform_dry_run(afl_state_t *afl) { } + if (afl->afl_env.afl_cmplog_only_new) { q->colorized = CMPLOG_LVL_MAX; } + u8 *fn = strrchr(q->fname, '/') + 1; ACTF("Attempting dry run with '%s'...", fn); @@ -791,6 +850,7 @@ void perform_dry_run(afl_state_t *afl) { if (fd < 0) { PFATAL("Unable to open '%s'", q->fname); } u32 read_len = MIN(q->len, (u32)MAX_FILE); + use_mem = afl_realloc(AFL_BUF_PARAM(in), read_len); if (read(fd, use_mem, read_len) != (ssize_t)read_len) { FATAL("Short read from '%s'", q->fname); @@ -987,25 +1047,33 @@ void perform_dry_run(afl_state_t *afl) { /* Remove from fuzzing queue but keep for splicing */ struct queue_entry *p = afl->queue; + + if (!p->was_fuzzed) { + + p->was_fuzzed = 1; + --afl->pending_not_fuzzed; + --afl->active_paths; + + } + p->disabled = 1; p->perf_score = 0; - while (p && p->next != q) - p = p->next; - if (p) - p->next = q->next; - else - afl->queue = q->next; + u32 i = 0; + while (unlikely(afl->queue_buf[i]->disabled)) { + + ++i; - --afl->pending_not_fuzzed; - --afl->active_paths; + } + + afl->queue = afl->queue_buf[i]; afl->max_depth = 0; - p = afl->queue; - while (p) { + for (i = 0; i < afl->queued_paths; i++) { - if (p->depth > afl->max_depth) afl->max_depth = p->depth; - p = p->next; + if (!afl->queue_buf[i]->disabled && + afl->queue_buf[i]->depth > afl->max_depth) + afl->max_depth = afl->queue_buf[i]->depth; } @@ -1038,8 +1106,6 @@ void perform_dry_run(afl_state_t *afl) { } - q = q->next; - } if (cal_failures) { @@ -1065,74 +1131,69 @@ void perform_dry_run(afl_state_t *afl) { /* Now we remove all entries from the queue that have a duplicate trace map */ - q = afl->queue; - struct queue_entry *p, *prev = NULL; - int duplicates = 0; - -restart_outer_cull_loop: + u32 duplicates = 0, i; - while (q) { + for (idx = 0; idx < afl->queued_paths; idx++) { - if (q->cal_failed || !q->exec_cksum) { goto next_entry; } + q = afl->queue_buf[idx]; + if (q->disabled || q->cal_failed || !q->exec_cksum) { continue; } - restart_inner_cull_loop: + u32 done = 0; + for (i = idx + 1; i < afl->queued_paths && !done; i++) { - p = q->next; + struct queue_entry *p = afl->queue_buf[i]; + if (p->disabled || p->cal_failed || !p->exec_cksum) { continue; } - while (p) { - - if (!p->cal_failed && p->exec_cksum == q->exec_cksum) { + if (p->exec_cksum == q->exec_cksum) { duplicates = 1; - --afl->pending_not_fuzzed; - afl->active_paths--; - - // We do not remove any of the memory allocated because for - // splicing the data might still be interesting. - // We only decouple them from the linked list. - // This will result in some leaks at exit, but who cares. // we keep the shorter file if (p->len >= q->len) { + if (!p->was_fuzzed) { + + p->was_fuzzed = 1; + --afl->pending_not_fuzzed; + --afl->active_paths; + + } + p->disabled = 1; p->perf_score = 0; - q->next = p->next; - goto restart_inner_cull_loop; } else { + if (!q->was_fuzzed) { + + q->was_fuzzed = 1; + --afl->pending_not_fuzzed; + --afl->active_paths; + + } + q->disabled = 1; q->perf_score = 0; - if (prev) - prev->next = q = p; - else - afl->queue = q = p; - goto restart_outer_cull_loop; + + done = 1; } } - p = p->next; - } - next_entry: - - prev = q; - q = q->next; - } if (duplicates) { afl->max_depth = 0; - q = afl->queue; - while (q) { - if (q->depth > afl->max_depth) afl->max_depth = q->depth; - q = q->next; + for (idx = 0; idx < afl->queued_paths; idx++) { + + if (!afl->queue_buf[idx]->disabled && + afl->queue_buf[idx]->depth > afl->max_depth) + afl->max_depth = afl->queue_buf[idx]->depth; } @@ -1182,11 +1243,15 @@ static void link_or_copy(u8 *old_path, u8 *new_path) { void pivot_inputs(afl_state_t *afl) { struct queue_entry *q = afl->queue; - u32 id = 0; + u32 id = 0, i; ACTF("Creating hard links for all input files..."); - while (q) { + for (i = 0; i < afl->queued_paths; i++) { + + q = afl->queue_buf[i]; + + if (unlikely(q->disabled)) { continue; } u8 *nfn, *rsl = strrchr(q->fname, '/'); u32 orig_id; @@ -1214,19 +1279,14 @@ void pivot_inputs(afl_state_t *afl) { afl->resuming_fuzz = 1; nfn = alloc_printf("%s/queue/%s", afl->out_dir, rsl); - /* Since we're at it, let's also try to find parent and figure out the + /* Since we're at it, let's also get the parent and figure out the appropriate depth for this entry. */ src_str = strchr(rsl + 3, ':'); if (src_str && sscanf(src_str + 1, "%06u", &src_id) == 1) { - struct queue_entry *s = afl->queue; - while (src_id-- && s) { - - s = s->next; - - } + struct queue_entry *s = afl->queue_buf[src_id]; if (s) { q->depth = s->depth + 1; } @@ -1274,7 +1334,6 @@ void pivot_inputs(afl_state_t *afl) { if (q->passed_det) { mark_as_det_done(afl, q); } - q = q->next; ++id; } @@ -2434,6 +2493,7 @@ void setup_testcase_shmem(afl_state_t *afl) { // we need to set the non-instrumented mode to not overwrite the SHM_ENV_VAR u8 *map = afl_shm_init(afl->shm_fuzz, MAX_FILE + sizeof(u32), 1); + afl->shm_fuzz->shmemfuzz_mode = 1; if (!map) { FATAL("BUG: Zero return from afl_shm_init."); } |