[Asterisk-Users] app_conference DTMFs?

[Matt Florell]

Hello,

My backtraces never actually mention play_sound, but the crashes only
happen right after app_conference attempts to play out DTMF tines with
the playing function.

Here's the backtrace for two of the crashes that we had with app_conference:
http://205.201.151.24/files/app_conference-crash-2006-06-02.txt
http://205.201.151.24/files/app_conference-crash-2006-06-05.txt

MATT---


On 7/12/06, jeff oconnell <jeff.oconnell at gmail.com> wrote:
>
> interesting. i didn't realize the problem seems to specifically be the sound
> playback via the manager interface.
>
> a couple weeks ago, my asterisk on my dev box crashed, i did some
> preliminary investigation, but since we hadn't had any problems in
> production or qa, i chalked it up to me messing up my dev install somehow.
>
> anyway, here's the backtrace of the core:
>
> (gdb) bt
> #0  0x00df71bb in ?? () from /lib/libgcc_s.so.1
> #1  0x080625ad in ast_deactivate_generator (chan=0x815fb40) at
> channel.c:1382
> #2  0x0806d77a in ast_openstream_full (chan=0x815fb40, filename=0x815dcec
> "tones-exit", preflang=0x0, asis=0) at file.c:494
> #3  0x0806d835 in ast_openstream (chan=0x71bfb8a6, filename=0x71bfb8a6
> <Address
> 0x71bfb8a6 out of bounds>, preflang=0x71bfb8a6 <Address 0x71bfb8a6 out of
> bounds>) at file.c:467
> #4  0xb7e8899b in conference_play_sound (fd=12, argc=14643636,
> argv=0xdfdc5c)
> at cli.c:225
> #5  0x0809786b in ast_cli_command (fd=12, s=0x71bfb8a6 <Address 0x71bfb8a6
> out
> of bounds>) at cli.c:1364
> #6  0x080b2f8a in action_command (s=0x815c448, m=0xb7b97420) at
> manager.c:927
> #7  0x080b7b81 in process_message (s=0x815c448, m=0xb7b97420) at
> manager.c:1305
> #8  0x080b83cf in session_do (data=0x815c448) at manager.c:1401
> #9  0x00b44341 in start_thread () from /lib/tls/libpthread.so.0
> #10 0x009096fe in clone () from /lib/tls/libc.so.6
>
> the interesting lines to me are #4 and #5:
>
> #4  0xb7e8899b in conference_play_sound (fd=12, argc=14643636,
> argv=0xdfdc5c)
>  at cli.c:225
>
> #5  0x0809786b in ast_cli_command (fd=12, s=0x71bfb8a6 <Address 0x71bfb8a6
> out
>  of bounds>) at cli.c:1364
>
> line 4 becauset the argc passed into conference_play_sound() is so large,
> and line 5 because there seems to be an out--of-bounds problem in the
> asterisk code ( i.e. before the app_conference code is called ).
>
>  based on what you said in your last post, i'm going to look at this more.
>
> if you have any thoughts on my backtrace/analysis, let me know.
>
> j-
>
>
>
> On 7/12/06, Matt Florell <astmattf at gmail.com> wrote:
> > The issues with the double-free crashes that we've had all seem to be
> > caused by playing of audio files(like the entry/exit sounds or the
> > DTMF broadcast). But these functions use the app_conference code that
> > was already existing to play audio files from manager API commands so
> > the issue was there it just wasn't as tested because not many people
> > use the manager command a lot to play audio in conferences.
> >
>
>