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add model

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This commit is contained in:
vanhauser-thc
2024-06-04 13:45:17 +02:00
parent 1db82f3303
commit fd82e3330c
2 changed files with 36 additions and 13 deletions
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2
GNUmakefile
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@ -472,7 +472,7 @@ src/afl-sharedmem.o : $(COMM_HDR) src/afl-sharedmem.c include/sharedmem.h
$(CC) $(CFLAGS) $(CFLAGS_FLTO) $(SPECIAL_PERFORMANCE) -c src/afl-sharedmem.c -o src/afl-sharedmem.o
afl-fuzz: $(COMM_HDR) include/afl-fuzz.h $(AFL_FUZZ_FILES) src/afl-common.o src/afl-sharedmem.o src/afl-forkserver.o src/afl-performance.o src/hashmap.c | test_x86
$(CC) $(CFLAGS) $(COMPILE_STATIC) $(CFLAGS_FLTO) $(SPECIAL_PERFORMANCE) -Wno-shift-count-overflow $(AFL_FUZZ_FILES) src/afl-common.o src/afl-sharedmem.o src/afl-forkserver.o src/afl-performance.o src/hashmap.c -o $@ $(PYFLAGS) $(LDFLAGS) -lm
$(CC) $(CFLAGS) $(COMPILE_STATIC) $(CFLAGS_FLTO) $(SPECIAL_PERFORMANCE) -Wno-shift-count-overflow $(AFL_FUZZ_FILES) src/afl-common.o src/afl-sharedmem.o src/afl-forkserver.o src/afl-performance.o src/hashmap.c -o $@ $(PYFLAGS) $(LDFLAGS) -lm -lxgboost
afl-showmap: src/afl-showmap.c src/afl-common.o src/afl-sharedmem.o src/afl-forkserver.o src/afl-performance.o $(COMM_HDR) | test_x86
$(CC) $(CFLAGS) $(COMPILE_STATIC) $(CFLAGS_FLTO) $(SPECIAL_PERFORMANCE) src/$@.c src/afl-fuzz-mutators.c src/afl-fuzz-python.c src/afl-common.o src/afl-sharedmem.o src/afl-forkserver.o src/afl-performance.o -o $@ $(PYFLAGS) $(LDFLAGS)

47
src/afl-fuzz-queue.c
View File

@ -26,6 +26,7 @@
#include <limits.h>
#include <ctype.h>
#include <math.h>
#include <xgboost/c_api.h>
#ifdef _STANDALONE_MODULE
void minimize_bits(afl_state_t *afl, u8 *dst, u8 *src) {
@ -117,7 +118,7 @@ void create_alias_table(afl_state_t *afl) {
double avg_exec_us = 0.0;
double avg_bitmap_size = 0.0;
double avg_top_size = 0.0;
double avg_len = 0.0;
u32 active = 0;
for (i = 0; i < n; i++) {
@ -128,8 +129,8 @@ void create_alias_table(afl_state_t *afl) {
if (likely(!q->disabled)) {
avg_exec_us += q->exec_us;
avg_bitmap_size += log(q->bitmap_size);
avg_top_size += q->tc_ref;
avg_bitmap_size += q->bitmap_size;
avg_len += q->len;
++active;
}
@ -138,7 +139,10 @@ void create_alias_table(afl_state_t *afl) {
avg_exec_us /= active;
avg_bitmap_size /= active;
avg_top_size /= active;
avg_len /= active;
float *table = malloc((active + 1) * 3 * sizeof(float));
float *pentry = table;
for (i = 0; i < n; i++) {
@ -146,29 +150,48 @@ void create_alias_table(afl_state_t *afl) {
if (likely(!q->disabled)) {
q->weight =
compute_weight(afl, q, avg_exec_us, avg_bitmap_size, avg_top_size);
*pentry++ = q->len / avg_len;
*pentry++ = q->exec_us / avg_exec_us;
*pentry++ = q->bitmap_size / avg_bitmap_size;
q->perf_score = calculate_score(afl, q);
sum += q->weight;
}
}
if (unlikely(afl->schedule == MMOPT) && afl->queued_discovered) {
DMatrixHandle dtest;
BoosterHandle booster;
u32 cnt = afl->queued_discovered >= 5 ? 5 : afl->queued_discovered;
// Erstellen einer DMatrix aus dem Array
XGDMatrixCreateFromMat((float *)table, 3, active, -1, &dtest);
XGBoosterCreate(&dtest, 1, &booster);
XGBoosterLoadModel(booster, "./model.bin");
bst_ulong out_len;
const float *predictions;
XGBoosterPredict(booster, dtest, 0, 0, 0, &out_len, &predictions);
for (i = n - cnt; i < n; i++) {
// Ausgabe der Vorhersagen
int count = 0;
for (i = 0; i < n; i++) {
struct queue_entry *q = afl->queue_buf[i];
struct queue_entry *q = afl->queue_buf[i];
if (likely(!q->disabled)) { q->weight *= 2.0; }
if (likely(!q->disabled)) {
fprintf(stderr, "Prediction[%u] = %f\n", i, predictions[count]);
afl->queue_buf[i]->weight = predictions[count++];
sum += predictions[count++];
}
}
// Freigeben der Ressourcen
XGBoosterFree(booster);
XGDMatrixFree(dtest);
free(table);
for (i = 0; i < n; i++) {
// weight is always 0 for disabled entries