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-rw-r--r--src/afl-forkserver.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/src/afl-forkserver.c b/src/afl-forkserver.c
index 313aa363..d294f7fc 100644
--- a/src/afl-forkserver.c
+++ b/src/afl-forkserver.c
@@ -113,7 +113,16 @@ void afl_fsrv_init_dup(afl_forkserver_t *fsrv_to, afl_forkserver_t *from) {
   fsrv_to->child_pid = -1;
   fsrv_to->use_fauxsrv = 0;
   fsrv_to->last_run_timed_out = 0;
-  fsrv_to->out_fd = -1;
+
+  if (fsrv_to->use_stdin) {
+
+    fsrv_to->out_fd = 0;
+
+  } else {
+
+    fsrv_to->out_fd = -1;
+
+  }
 
   fsrv_to->init_child_func = fsrv_exec_child;
   // Note: do not copy ->add_extra_func