From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Frediano Ziglio <fziglio@redhat.com>
Date: Mon, 15 May 2017 15:57:28 +0100
Subject: [PATCH] reds: Avoid integer overflows handling monitor configuration

Avoid VDAgentMessage::size integer overflows.

Signed-off-by: Frediano Ziglio <fziglio@redhat.com>
---
 server/reds.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/server/reds.c b/server/reds.c
index 95293dd..eda3486 100644
--- a/server/reds.c
+++ b/server/reds.c
@@ -1024,6 +1024,9 @@ static void reds_on_main_agent_monitors_config(
         spice_debug("not enough data yet. %d", cmc->buffer_size);
         return;
     }
+    if (msg_header->size < sizeof(VDAgentMonitorsConfig)) {
+        goto overflow;
+    }
     monitors_config = (VDAgentMonitorsConfig *)(cmc->buffer + sizeof(*msg_header));
     spice_debug("%s: %d", __func__, monitors_config->num_of_monitors);
     red_dispatcher_client_monitors_config(monitors_config);