1 files changed, 1 insertions, 0 deletions
diff --git a/malloc/malloc.c b/malloc/malloc.c
index 0b9facefd4..703dcb56e7 100644
--- a/malloc/malloc.c
+++ b/malloc/malloc.c
@@ -4802,6 +4802,7 @@ _int_free(mstate av, mchunkptr p)
 	    goto errout;
 	  }
 	p->fd = fd = old;
+	atomic_full_barrier ();
       }
     while ((old = catomic_compare_and_exchange_val_acq (fb, p, fd)) != fd);
 #else