Re: [Ccrtp-devel] segmentation fault

[Federico Montesino Pouzols]

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/libc.so.6
> >#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,
> >Michel
> >
> >