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-rw-r--r--src/afl-fuzz-mutators.c2
-rw-r--r--src/afl-fuzz-one.c6
-rw-r--r--src/afl-fuzz-run.c3
3 files changed, 4 insertions, 7 deletions
diff --git a/src/afl-fuzz-mutators.c b/src/afl-fuzz-mutators.c
index b6aeec63..9407adfb 100644
--- a/src/afl-fuzz-mutators.c
+++ b/src/afl-fuzz-mutators.c
@@ -460,6 +460,8 @@ u8 trim_case_custom(afl_state_t *afl, struct queue_entry *q, u8 *in_buf,
       }
 
       out_len = retlen;
+      // TODO are we sure that retbuf fits into out_buf if retbuf can actually
+      // increase in size?
       memcpy(out_buf, retbuf, retlen);
 
       /* Tell the custom mutator that the trimming was successful */
diff --git a/src/afl-fuzz-one.c b/src/afl-fuzz-one.c
index d3801f03..169baab9 100644
--- a/src/afl-fuzz-one.c
+++ b/src/afl-fuzz-one.c
@@ -1961,11 +1961,7 @@ custom_mutator_stage:
 
           }
 
-          /* `(afl->)out_buf` may have been changed by the call to custom_fuzz
-           */
-          /* TODO: Only do this when `mutated_buf` == `out_buf`? Branch vs
-           * Memcpy.
-           */
+          /* out_buf may have been changed by the call to custom_fuzz */
           memcpy(out_buf, in_buf, len);
 
         }
diff --git a/src/afl-fuzz-run.c b/src/afl-fuzz-run.c
index 866127be..09e773f0 100644
--- a/src/afl-fuzz-run.c
+++ b/src/afl-fuzz-run.c
@@ -132,8 +132,7 @@ write_to_testcase(afl_state_t *afl, void **mem, u32 len, u32 fix) {
 
     if (new_mem != *mem) {
 
-      *mem = afl_realloc(mem, new_size);
-      memcpy(*mem, new_mem, new_size);
+      *mem = new_mem;
 
     }