From 66282f58000c8863e104666c30cb67b1d5cbdee3 Mon Sep 17 00:00:00 2001
From: "Kyle J. McKay" <mackyle@gmail.com>
Date: Fri, 18 May 2012 00:30:11 -0700
Subject: [PATCH] libvncserver/sockets.c: do not segfault when
 listenSock/listen6Sock == -1
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Signed-off-by: Petr Písař <ppisar@redhat.com>
---
 libvncserver/sockets.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libvncserver/sockets.c b/libvncserver/sockets.c
index 84c9c98..3ff2aac 100644
--- a/libvncserver/sockets.c
+++ b/libvncserver/sockets.c
@@ -402,9 +402,9 @@ rfbProcessNewConnection(rfbScreenInfoPtr rfbScreen)
       rfbLogPerror("rfbProcessNewConnection: error in select");
       return FALSE;
     }
-    if (FD_ISSET(rfbScreen->listenSock, &listen_fds)) 
+    if (rfbScreen->listenSock >= 0 && FD_ISSET(rfbScreen->listenSock, &listen_fds))
       chosen_listen_sock = rfbScreen->listenSock;
-    if (FD_ISSET(rfbScreen->listen6Sock, &listen_fds)) 
+    if (rfbScreen->listen6Sock >= 0 && FD_ISSET(rfbScreen->listen6Sock, &listen_fds))
       chosen_listen_sock = rfbScreen->listen6Sock;
 
     if ((sock = accept(chosen_listen_sock,
-- 
2.13.5