1 files changed, 13 insertions, 20 deletions
diff --git a/examples/custom_mutators/example.c b/examples/custom_mutators/example.c
index a9764f5b..c8200b26 100644
--- a/examples/custom_mutators/example.c
+++ b/examples/custom_mutators/example.c
@@ -142,32 +142,25 @@ size_t afl_custom_fuzz(my_mutator_t *data, uint8_t *buf, size_t buf_size,
 size_t afl_custom_pre_save(my_mutator_t *data, uint8_t *buf, size_t buf_size,
                            uint8_t **out_buf) {
 
-  if (data->pre_save_size < buf_size + 5) {
+  uint8_t *pre_save_buf = maybe_grow(BUF_PARAMS(data, pre_save), buf_size + 5);
+  if (!pre_save_buf) {
 
-    data->pre_save_buf = maybe_grow(BUF_PARAMS(data, pre_save), buf_size + 5);
-    if (!data->pre_save_buf) {
-
-      perror("custom mutator realloc failed.");
-      *out_buf = NULL;
-      return 0;
-
-    }
-
-    data->pre_save_size = buf_size + 5;
+    perror("custom mutator realloc failed.");
+    *out_buf = NULL;
+    return 0;
 
   }
 
-  *out_buf = data->pre_save_buf;
+  memcpy(pre_save_buf + 5, buf, buf_size);
+  pre_save_buf[0] = 'A';
+  pre_save_buf[1] = 'F';
+  pre_save_buf[2] = 'L';
+  pre_save_buf[3] = '+';
+  pre_save_buf[4] = '+';
 
-  memcpy(*out_buf + 5, buf, buf_size);
-  size_t out_buf_size = buf_size + 5;
-  *out_buf[0] = 'A';
-  *out_buf[1] = 'F';
-  *out_buf[2] = 'L';
-  *out_buf[3] = '+';
-  *out_buf[4] = '+';
+  *out_buf = pre_save_buf;
 
-  return out_buf_size;
+  return buf_size + 5;
 
 }