From 69a00f58f5fb67e57dcfb5de753680dca9f004e3 Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Sun, 22 Jan 2017 23:09:50 +0100
Subject: [PATCH] guard against 0

---
 src/cadet/gnunet-service-cadet-new.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/cadet/gnunet-service-cadet-new.c b/src/cadet/gnunet-service-cadet-new.c
index 78d4206f0..76bc4ec48 100644
--- a/src/cadet/gnunet-service-cadet-new.c
+++ b/src/cadet/gnunet-service-cadet-new.c
@@ -644,7 +644,8 @@ check_data (void *cls,
                    buf,
                    sizeof (pa));
     payload_claimed_size = ntohs (pa.size);
-    if (payload_size < payload_claimed_size)
+    if ( (payload_size < payload_claimed_size) ||
+         (0 == payload_claimed_size) )
     {
       GNUNET_break_op (0);
       return GNUNET_SYSERR;
-- 
2.25.1