X2Go Bug report logs - #516
X2go successfully connects to server, but no window is shown

version graph

Package: nxagent; Maintainer for nxagent is X2Go Developers <x2go-dev@lists.x2go.org>; Source for nxagent is src:nx-libs.

Reported by: sebastien chabrolles <s.chabrolles@fr.ibm.com>

Date: Sat, 14 Jun 2014 20:25:03 UTC

Severity: normal

Tags: pending

Found in version 3.5.0.24

Fixed in version 3.5.0.25

Done: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>

Bug is archived. No further changes may be made.

Full log

Message #80 received at 516@bugs.x2go.org (full text, mbox, reply):

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Message-ID: <53A5F55B.4020000@ionic.de>
Date: Sat, 21 Jun 2014 23:12:59 +0200
From: Mihai Moldovan <ionic@ionic.de>
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To: 516@bugs.x2go.org, Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
Subject: Re: [X2Go-Dev] Bug#516: [PATCH 1/5 v2] Create Windows and fix drawing
 issues on Big Endian 64bit systems
References: <OF70D11DD0.EF25FFDA-ONC1257CF7.006F3027-C1257CF7.006FFC35@fr.ibm.com> <53A4F5FE.4000206@ionic.de> <53A4F8DF.30404@ionic.de>
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[Message part 1 (text/plain, inline)]
Multiple endiannes issues were setting incorrect event masks when creating and
drawing X11 windows.

This time, a smaller integer has been casted to a bigger one and passed to some
function actually setting its value.

This meant, that garbage from stack was attached to the smaller integer value,
putting unknown memory into the lower bytes of the bigger integer.

Fix this by creating a big, initialized temporary variable, let the function do
its magic on that one and pass the value back to the smaller variable -- and
cross your fingers the smaller variable can hold it without overrunning. (The
last bit is a design issue we can't really fix and has been around even before
this patch.)


This fixes window creation and redrawing/updating issues on Big Endian 64bit
systems.

[nxagent_Screen.c_Window.c-ppc64-et-al-sanitize-eventmasks.patch (text/plain, attachment)]
[smime.p7s (application/pkcs7-signature, attachment)]

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