From 3776e3a77bff3f3d7091e91aac2e1b6b3425b28d Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Tue, 21 Apr 2020 13:33:25 +0200
Subject: [PATCH] fix #6189

---
 src/include/gnunet_common.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/include/gnunet_common.h b/src/include/gnunet_common.h
index 9e7c77786..fcc510ec9 100644
--- a/src/include/gnunet_common.h
+++ b/src/include/gnunet_common.h
@@ -1209,7 +1209,10 @@ GNUNET_is_zero_ (const void *a,
  * @param n number of elements in the array
  * @param type name of the struct or union, i.e. pass 'struct Foo'.
  */
-#define GNUNET_new_array(n, type) (type *) GNUNET_malloc ((n) * sizeof(type))
+#define GNUNET_new_array(n, type) ({ \
+    GNUNET_assert (SIZE_MAX / sizeof (type) >= n); \
+    (type *) GNUNET_malloc ((n) * sizeof(type));   \
+  })
 
 /**
  * @ingroup memory
-- 
2.25.1