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Re: [Ccrtp-devel] segmentation fault

From: David Sugar
Subject: Re: [Ccrtp-devel] segmentation fault
Date: Thu, 01 Dec 2005 18:18:02 -0500
User-agent: Mozilla Thunderbird 1.0.7 (X11/20051011)

I am back from Venezuela, so I am ready to cut a new release soon.

Federico Montesino Pouzols wrote:

>Oooops. I've just fixed it in CVS as well as some other pending
>issues. I also added some code to use getUser.
>On Sun, Nov 27, 2005 at 05:23:06AM -0400, David Sugar wrote:
>>I am away in Venezuela until Tuesday, so I think Federico will get a 
>>chance to look at this first, but it is very streightforward.  In any 
>>case, I think it should make the next release.  Incidently, there is a 
>>Common C++ function to get user login id, Process::getUser(), it is 
>>portable, and maybe that is what should be used here.  On posix it does 
>>the user lookup by matching the uid of the process to the passwd file 
>>rather than using the environment.  On w32, it uses "GetUserName".
>>Michel de Boer wrote:
>>>Hi David, Federico,
>>>I have been debugging a segmentation fault that only happened on
>>>one machine. After a lot of debugging I found the cause. The
>>>backtrace I get is:
>>>#7  0x41161903 in strlen () from /lib/tls/
>>>#8  0x401b59eb in ost::RTPApplication::findCNAME (this=0x0)
>>>   at char_traits.h:143
>>>#9  0x401b5c49 in RTPApplication (this=0x401c9d80, address@hidden)
>>>   at source.cpp:161
>>>#10 0x401b5d16 in ost::defaultApplication () at stl_alloc.h:652
>>>#11 0x081ad0dc in t_twinkle_rtp_session (this=0x84bb668, address@hidden,
>>>   port=5004) at twinkle_rtp_session.cpp:6
>>>#12 0x081a0b1f in t_audio_session (this=0x83acd10, _session=0x84ae35c,
>>>   address@hidden, _recv_port=5004, address@hidden,
>>>   _dst_port=12668, _codec=139125596, _ptime=20) at basic_string.h:716
>>>I found that this crash can happen for 2 reasons:
>>>1) LOGNAME is not set
>>>2) The hostname is not in /etc/hosts
>>>In both cases ccrtp tries to use a NULL pointer.
>>>Attached you find a patch that fixes the problem. I hope you will fix
>>>this in the next release.
>>>Best regards,
>Ccrtp-devel mailing list

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