Segfault in nxupnp

[taichichuan]

Hi Gang,

When I run NX NXSERVER-4.0.346 on Linux Mint 15 (Ubuntu 13.04) on an AMD64 platform with 8GBs of RAM and NVidia NVS 5200 graphics I see a lot of these:

[25997.289545] nxupnp[24000]: segfault at 0 ip 000000000040c0e8 sp 00007fff006a6030 error 4 in nxupnp[400000+10000]
[26027.391104] nxupnp[24015]: segfault at 0 ip 000000000040c0e8 sp 00007fff7e78f020 error 4 in nxupnp[400000+10000]
[26057.503555] nxupnp[24050]: segfault at 0 ip 000000000040c0e8 sp 00007fff39fea680 error 4 in nxupnp[400000+10000]
[26087.611854] nxupnp[24068]: segfault at 0 ip 000000000040c0e8 sp 00007fff23bf7050 error 4 in nxupnp[400000+10000]

Anyone have any idea how to either fix these or at least shut the service off?

TIA

[interoperate]

I am seeing exactly the same problem on 64-bit Fedora 19 system with Intel -7-4770 CPU and NVIDIA GK107 [NVS510]

Running the client causes a hard lock of the system within a couple of minutes of running the client software.

[taichichuan]

OK, it’s good to know that I’m not the only one to see this.

[sil04]

The best is if you can enable debug log level into server.cfg (uncomment and set SessionLogLevel 7) .

Then restart the server with: /usr/NX/bin/nxserver –restart

and copy here nxserver.log if it’s not too long or send it to support.

[taichichuan]

Here is a copy of the server.log file with debugging enabled as was suggested. Hopefully, one of the developers can make heads or tails of this. There appears to be a lot of debug info that will need to be sorted through to try and find why this process is segfaulting.

[taichichuan]

OK, so it won’t allow me to upload the server log file. I’ll try it again in compressed format.

Attachments:

1. nxserver.tar.gz

[titan]

I don’t think the server log is going to tell anything useful. If it’s a nxupnp crash, only a core file with symbols will help. If you get in contact with the support, we’ll provide such binary tomorrow.

In the meanwhile you can just replace the binary with a script doing nothing:

> sudo sh
> /usr/NX/bin/nxserver –shutdown
> cd /usr/NX/bin/
> mv nxupnp nxpupnp.ori
> cat > nxupnp
#!/bin/sh
sleep 1
exit 0
^D <— press CTRL+D here
> chmod a+x nxupnp

Test it:

> ./nxupnp
>

Restart the server:

/usr/NX/bin/nxserver –startup

I tried it and I was still able to connect. UPnP is only used to query and forward ports on the router. You won’t have ports forwarded but, except for that, it should work fine.

[Author]

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