Merge pull request #1580 from guyf2010/dev

Add option for random cmplog colorization

1 files changed, 28 insertions, 1 deletions

diff --git a/src/afl-fuzz-redqueen.c b/src/afl-fuzz-redqueen.c
index 337f124d..0dae26a3 100644
--- a/src/afl-fuzz-redqueen.c
+++ b/src/afl-fuzz-redqueen.c
@@ -167,6 +167,25 @@ static u8 get_exec_checksum(afl_state_t *afl, u8 *buf, u32 len, u64 *cksum) {
 
 }
 
+/* replace everything with different values */
+static void random_replace(afl_state_t *afl, u8 *buf, u32 len) {
+
+  for (u32 i = 0; i < len; i++) {
+
+    u8 c;
+
+    do {
+
+      c = rand_below(afl, 256);
+
+    } while (c == buf[i]);
+
+    buf[i] = c;
+
+  }
+
+}
+
 /* replace everything with different values but stay in the same type */
 static void type_replace(afl_state_t *afl, u8 *buf, u32 len) {
 
@@ -293,7 +312,15 @@ static u8 colorization(afl_state_t *afl, u8 *buf, u32 len,
 
   memcpy(backup, buf, len);
   memcpy(changed, buf, len);
-  type_replace(afl, changed, len);
+  if (afl->cmplog_random_colorization) {
+
+    random_replace(afl, changed, len);
+
+  } else {
+
+    type_replace(afl, changed, len);
+
+  }
 
   while ((rng = pop_biggest_range(&ranges)) != NULL &&
          afl->stage_cur < afl->stage_max) {