-check return value

1 files changed, 2 insertions, 0 deletions

diff --git a/src/gns/gnunet-service-gns.c b/src/gns/gnunet-service-gns.c
index 28e6c3cc7..50b370264 100644
--- a/src/gns/gnunet-service-gns.c
+++ b/src/gns/gnunet-service-gns.c
@@ -469,6 +469,8 @@ perform_dht_put (const struct GNUNET_CRYPTO_EcdsaPrivateKey *key,
                                          label,
                                          rd_public,
                                          rd_public_count);
+  if (NULL == block)
+    return NULL; /* whoops */
   block_size = ntohl (block->purpose.size)
     + sizeof (struct GNUNET_CRYPTO_EcdsaSignature)
     + sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey);