From: Christian Grothoff <christian@grothoff.org>
Date: Thu, 23 Jun 2016 20:01:41 +0000 (+0000)
Subject: do not crash for #4588
X-Git-Tag: initial-import-from-subversion-38251~724
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=fb80a8163d9ff402a4502e29712000d71543fe60;p=oweals%2Fgnunet.git

do not crash for #4588
---

diff --git a/src/core/core_api.c b/src/core/core_api.c
index 7699f8b74..451b871fb 100644
--- a/src/core/core_api.c
+++ b/src/core/core_api.c
@@ -963,6 +963,11 @@ GNUNET_CORE_notify_transmit_ready (struct GNUNET_CORE_Handle *handle,
   struct SendMessageRequest *smr;
   struct GNUNET_MQ_Envelope *env;
 
+  if (NULL == handle->mq)
+  {
+    GNUNET_break (0); /* SEE #4588: do not call NTR from disconnect notification! */
+    return NULL;
+  }
   GNUNET_assert (NULL != notify);
   if ( (notify_size > GNUNET_CONSTANTS_MAX_ENCRYPTED_MESSAGE_SIZE) ||
        (notify_size + sizeof (struct SendMessage) >= GNUNET_SERVER_MAX_MESSAGE_SIZE) )