Bug#929498: Division by zero error

[Mike Gabriel <mike.gabriel@das-netzwerkteam.de>]

Package: src:nx-libs
Severity: important
Version: 2:3.5.99.19-2
Tags: patch fixed-upstream
Forwareded: https://github.com/ArcticaProject/nx-libs/issues/808

On the nx-libs upstream issue tracker, an occasional division-by-zero  
error in nxagent's xkb extension got recently reported.

The issue has been fixed upstream by this PR:
https://github.com/ArcticaProject/nx-libs/pull/809

Mike
--

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>From 4df77fe73fe03dc3098190f3702c0d5ab415968a Mon Sep 17 00:00:00 2001
From: Ulrich Sibiller <uli42@gmx.de>
Date: Wed, 15 May 2019 19:42:29 +0200
Subject: [PATCH 1/2] xkbUtils.c: Catch division by zero

Fixes ArcticaProject/nx-libs#808
---
 nx-X11/programs/Xserver/xkb/xkbUtils.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/nx-X11/programs/Xserver/xkb/xkbUtils.c b/nx-X11/programs/Xserver/xkb/xkbUtils.c
index 028f32454..21a5ce76a 100644
--- a/nx-X11/programs/Xserver/xkb/xkbUtils.c
+++ b/nx-X11/programs/Xserver/xkb/xkbUtils.c
@@ -685,6 +685,10 @@ unsigned	act;
 	    else group= newGroup;
 	}
 	else {
+#ifdef NXAGENT_SERVER
+	  /* we have seen division by zero here */
+	  if (ctrls->num_groups != 0)
+#endif
 	    group%= ctrls->num_groups;
 	}
     }
-- 
2.20.1

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