[sr-dev] segfault with t_suspend() / t_continue()

Thu Apr 4 21:33:30 CEST 2013

Hey Dragos,

okay I just looked at your config and I see you are not using
suspend/continue in a reply block so you shouldn't have crash.

Cheers
jason

On Thu, Apr 4, 2013 at 9:26 PM, Dragos Oancea <droancea at yahoo.com> wrote:

> Hi Daniel,  hi Guys,
>
> I did not stress test it, I only had one registered device (which sent the
> INVITE) , and another one was supposed to register after some event
> triggered by kamailio via a http query (using the utils module) - that's
> the reason I parked the transaction with "t_suspend()" .
> When the REGISTER for the second device comes I send the INVITE to the it
> .( lookup() , t_relay() ) . This is a scenario that works for me. I could
> say I tested 10 times and 1 time crashed.
> I plan to stress test these days, let me know if I should get some
> information for you while doing it.
>
>
> Regards,
> Dragos
>
>
>   ------------------------------
> *From:* Daniel-Constantin Mierla <miconda at gmail.com>
> *To:* Dragos Oancea <droancea at yahoo.com>; Kamailio (SER) - Development
> Mailing List <sr-dev at lists.sip-router.org>
> *Sent:* Thursday, April 4, 2013 8:53 PM
>
> *Subject:* Re: [sr-dev] segfault with t_suspend() / t_continue()
>
>  Hello,
>
> at first sight looks like a missing safety check, but I may be wrong after
> a long day. I need to look a bit deeper at it.
>
> Did you stress test it or was just casual trying? You said it happened
> one, couldn't be reproduced, right?
>
> Cheers,
> Daniel
>
> On 4/4/13 8:28 PM, Dragos Oancea wrote:
>
>  Hi Daniel,
>
>  Here is the output of `bt full`:
>  http://pastebin.com/tnrWML3L
>  Let me know if I can be of any assistance further.
>
>  Regards,
> Dragos
>
>    ------------------------------
> *From:* Daniel-Constantin Mierla <miconda at gmail.com> <miconda at gmail.com>
> *To:* Dragos Oancea <droancea at yahoo.com> <droancea at yahoo.com>; Kamailio
> (SER) - Development Mailing List <sr-dev at lists.sip-router.org><sr-dev at lists.sip-router.org>
> *Sent:* Thursday, April 4, 2013 7:28 PM
> *Subject:* Re: [sr-dev] segfault with t_suspend() / t_continue()
>
>  Hello,
>
> could be related, but the issue seems to be while processing a SIP reply,
> not with suspend/continue of a request. Can you send the output of 'bt
> full'?
>
> Cheers,
> Daniel
>
> On 4/4/13 6:56 PM, Dragos Oancea wrote:
>
>  Hello,
>
>
>  I got the following coredump while doing some testing with t_suspend()
> and t_continue() on the first INVITE:
>
>  (gdb) bt
> #0  qm_detach_free (qm=0x7fe2dae65000, size=16) at mem/q_malloc.c:269
> #1  qm_malloc (qm=0x7fe2dae65000, size=16) at mem/q_malloc.c:386
> #2  0x00007fe2e5e6d541 in update_totag_set (t=0x7fe2db0f42d0, ok=<value
> optimized out>) at t_reply.c:372
> #3  0x00007fe2e5e72387 in relay_reply (t=<value optimized out>,
> p_msg=<value optimized out>, branch=2, msg_status=200,
> cancel_data=0x7fff63fdf9b0, do_put_on_wait=1) at t_reply.c:1854
> #4  0x00007fe2e5e733e6 in reply_received (p_msg=0x7fe2e6a55ba0) at
> t_reply.c:2370
> #5  0x00000000004547f5 in do_forward_reply (msg=0x7fe2e6a55ba0,
> mode=<value optimized out>) at forward.c:799
> #6  0x000000000049a5ba in receive_msg (buf=<value optimized out>, len=961,
> rcv_info=0x7fff63fdfc40) at receive.c:270
> #7  0x00000000005281a6 in udp_rcv_loop () at udp_server.c:544
> #8  0x0000000000464d3a in main_loop () at main.c:1638
> #9  0x0000000000467a6c in main (argc=<value optimized out>, argv=<value
> optimized out>) at main.c:2566
>
>
>
>  I suspend the transaction in one route and then I continue it in another
> route, similar to below:
>
>  route[INVITE]
> #  Suspend and put to memcache:
>  t_suspend();
>         xlog("proceesing suspended in transaction
> [$T(id_index):$T(id_label)]\n");
>         $var(transaction_index)=$T(id_index);
>         $var(transaction_label)=$T(id_label);
>
>         $mct(wait_$tU)= "" + $var(transaction_index) + ":" +
> $var(transaction_label);
>         $mctex(wait_$tU) = 100;
> }
>
>  route[INVITE_resume]   {
>
>  # get the transaction index and lable from memcache
>     $avp(check) = $mct(wait_$tU) ; # I should have the transaction index
> and the transaction label here
>      $var(my_transaction_index) =  $(avp(check){s.select,0,:});
>     $var(my_transaction_label) =  $(avp(check){s.select,1,:});
>     $var(a)= $(var(my_transaction_index){s.int});
>     $var(b) = $(var(my_transaction_label){s.int});
>
>       t_continue( "$var(a)",  "$var(b)" , "my_relay_route");
> }
>
>
>  route[INVITE_resume] executes only on an asynchronous event (a certain
> SIP message that might come or not) .
>
>  I use kamailio 4.0.0/Centos Linux. I suspect it happened when I sent
> CANCEL, but I could not reproduce. I still have the core file.
>
>  Regards,
> Dragos
>
>
>
> _______________________________________________
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>
>
> --
> Daniel-Constantin Mierla - http://www.asipto.comhttp://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
> Kamailio World Conference, April 16-17, 2013, Berlin
>  - http://conference.kamailio.com -
>
>
>
>
> --
> Daniel-Constantin Mierla - http://www.asipto.comhttp://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
> Kamailio World Conference, April 16-17, 2013, Berlin
>  - http://conference.kamailio.com -
>
>
>
>
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