X2Go Bug report logs - #582
Fwd: [Bug 1133614] New: [abrt] nxagent: nxagentResolveColor(): nxagent killed by SIGFPE

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

Reported by: Orion Poplawski <orion@cora.nwra.com>

Date: Mon, 25 Aug 2014 16:20:01 UTC

Severity: normal

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Report forwarded to x2go-dev@lists.x2go.org, X2Go Developers <x2go-dev@lists.x2go.org>:
Bug#582; Package nx-libs. (Mon, 25 Aug 2014 16:20:01 GMT) Full text and rfc822 format available.

Acknowledgement sent to Orion Poplawski <orion@cora.nwra.com>:
New Bug report received and forwarded. Copy sent to X2Go Developers <x2go-dev@lists.x2go.org>. (Mon, 25 Aug 2014 16:20:01 GMT) Full text and rfc822 format available.

Message #5 received at submit@bugs.x2go.org (full text, mbox):

From: Orion Poplawski <orion@cora.nwra.com>
To: submit@bugs.x2go.org
Subject: Fwd: [Bug 1133614] New: [abrt] nxagent: nxagentResolveColor(): nxagent killed by SIGFPE
Date: Mon, 25 Aug 2014 10:16:41 -0600
Package: nx-libs
Version 3.5.0.27

Core was generated by `/usr/lib64/nx/../x2go/bin/x2goagent -extension XFIXES 
-nolisten tcp -nolisten t'.
Program terminated with signal SIGFPE, Arithmetic exception.
#0  0x000000000048bb41 in nxagentResolveColor (pRed=0xff, 
pGreen=0x7fffcb8eb4f6, pBlue=0x7fffcb8eb4f6, pVisual=0x0) at Colormap.c:504
504			   65535) / limb) >> shift) * 65535) / lim;

Thread 1 (Thread 0x7f9b2ef22780 (LWP 26422)):
#0  0x000000000048bb41 in nxagentResolveColor (pRed=0xff, 
pGreen=0x7fffcb8eb4f6, pBlue=0x7fffcb8eb4f6, pVisual=0x0) at Colormap.c:504
        shift = 8
        lim = 255
#1  0x0000000000464c7b in AllocColor (pmap=0x20ca7e0, 
pred=pred@entry=0x7fffcb8eb4f6, pgreen=pgreen@entry=0x7fffcb8eb4f6, 
pblue=pblue@entry=0x7fffcb8eb4f6, pPix=pPix@entry=0x7fffcb8eb4f8, 
client=client@entry=0) at colormap.c:820
        pixR = 0
        pixG = 8192
        pixB = 0
        entries = <optimized out>
        rgb = {red = 0, green = 0, blue = 0, pad = 0}
        class = <optimized out>
        pVisual = 0x1ee8860
        npix = <optimized out>
        ppix = <optimized out>


I don't understand with pVisual is reported to be 0x0 in 
nxagentResolveColor(), but that seems the most suspicious thing.  Also, do we 
want to disable SIGFPE?


-------- Original Message --------
Subject: [Bug 1133614] New: [abrt] nxagent: nxagentResolveColor(): nxagent 
killed by SIGFPE
Date: Mon, 25 Aug 2014 14:47:49 +0000
From: bugzilla@redhat.com
To: orion@cora.nwra.com

https://bugzilla.redhat.com/show_bug.cgi?id=1133614

            Bug ID: 1133614
           Summary: [abrt] nxagent: nxagentResolveColor(): nxagent killed
                    by SIGFPE
           Product: Fedora
           Version: 20
         Component: nx-libs
          Assignee: orion@cora.nwra.com
          Reporter: Saurval@yahoo.com
        QA Contact: extras-qa@fedoraproject.org
                CC: orion@cora.nwra.com



Description of problem:
After the first connection with x2go future connections (or reconnections) to
the server often hang or cause a crash.

Version-Release number of selected component:
nxagent-3.5.0.27-1.fc20

Additional info:
reporter:       libreport-2.2.3
backtrace_rating: 4
cmdline:        /usr/lib64/nx/../x2go/bin/x2goagent -extension XFIXES -nolisten
tcp -nolisten tcp -dpi 72 -D -auth /home/marius/.Xauthority -geometry 1024x768
-name X2GO-marius-66-1408949736_stDKDE_dp32 :66
crash_function: nxagentResolveColor
executable:     /usr/lib64/nx/bin/nxagent
kernel:         3.15.8-200.fc20.x86_64
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 nxagentResolveColor at Colormap.c:504
 #1 AllocColor at colormap.c:820
 #2 nxagentCreateDefaultColormap at Colormap.c:531
 #3 nxagentOpenScreen at Screen.c:1926
 #4 nxagentReconnectScreen at Screen.c:3546
 #5 nxagentReconnectSession at Reconnect.c:469
 #6 nxagentHandleConnectionChanges at Reconnect.c:827
 #7 nxagentHandleConnectionStates at Reconnect.c:218
 #8 nxagentWakeupHandler at Handlers.c:589
 #9 WakeupHandler at dixutils.c:472

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