fix symcc custom mutator

custom_mutators/symcc/symcc.c

@@ -287,7 +287,7 @@ size_t afl_custom_fuzz(my_mutator_t *data, uint8_t *buf, size_t buf_size,
     struct stat st;
     u8 *        fn = alloc_printf("%s/%s", data->out_dir, nl[i]->d_name);
 
-    if (done == 0) {
+    if (!done) {
 
       if (stat(fn, &st) == 0 && S_ISREG(st.st_mode) && st.st_size) {
 
@@ -299,14 +299,13 @@ size_t afl_custom_fuzz(my_mutator_t *data, uint8_t *buf, size_t buf_size,
           *out_buf = data->mutator_buf;
 
           close(fd);
+          unlink(fn);
           done = 1;
 
         }
 
       }
 
-      unlink(fn);
-
     }
 
     ck_free(fn);

docs/Changelog.md

@@ -64,7 +64,9 @@
   - afl-whatsup:
     - now also displays current average speed
     - small bugfixes
-  - Fixes for aflpp custom mutator and standalone tool
+  - custom mutators:
+    - fixes for aflpp custom mutator and standalone tool
+    - important fix to the symcc custom mutator
   - Minor edits to afl-persistent-config
   - Prevent temporary files being left behind on aborted afl-whatsup
   - More CPU benchmarks added to benchmark/