[asterisk-bugs] [JIRA] Created: (ASTERISK-20237) Assert failure in chan_sip calling pj_mutex_unlock after a few calls

[Jeremy Pepper (JIRA)]

Assert failure in chan_sip calling pj_mutex_unlock after a few calls
--------------------------------------------------------------------

                 Key: ASTERISK-20237
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-20237
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Channels/chan_sip/General
    Affects Versions: 11.0.0-beta1
         Environment: Ubuntu 10.04.1 LTS
            Reporter: Jeremy Pepper


I have a single SIP account configured to register a softphone to a test server. After making a few calls, I invariably get this error:

{noformat}
asterisk: ../src/pj/os_core_unix.c:1276: pj_mutex_unlock: Assertion `mutex->owner == pj_thread_this()' failed.
Aborted (core dumped)
{noformat}

GDB provides this backtrace:

{noformat}
#0  0xb7857430 in __kernel_vsyscall ()
#1  0xb7718651 in *__GI_raise (sig=6)
    at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#2  0xb771ba82 in *__GI_abort () at abort.c:92
#3  0xb7711718 in *__GI___assert_fail (
    assertion=0xb5facce4 "mutex->owner == pj_thread_this()", 
    file=0xb5faca78 "../src/pj/os_core_unix.c", line=1276, 
    function=0xb5face18 "pj_mutex_unlock") at assert.c:81
#4  0xb5f9788e in pj_mutex_unlock (mutex=0xb78443ec)
    at ../src/pj/os_core_unix.c:1276
#5  0xb5f9710d in pj_atomic_get (atomic_var=0x93ba440)
    at ../src/pj/os_core_unix.c:888
#6  0xb5f7fbb8 in pj_stun_session_destroy (sess=0x93b9e4c)
    at ../src/pjnath/stun_session.c:542
#7  0xb5f75c9a in destroy_ice (ice=0x93cf29c, reason=0)
    at ../src/pjnath/ice_session.c:474
#8  0xb5f75db3 in pj_ice_sess_destroy (ice=0x93cf29c)
    at ../src/pjnath/ice_session.c:503
#9  0xb5f687f4 in ast_rtp_destroy (instance=0x93bb0bc)
    at res_rtp_asterisk.c:1236
#10 0x081908a9 in instance_destructor (obj=0x93bb0bc) at rtp_engine.c:212
#11 0x0808f486 in internal_ao2_ref (user_data=<value optimized out>, 
    delta=<value optimized out>, file=<value optimized out>, line=539, 
    func=0x81f496e "__ao2_ref") at astobj2.c:461
#12 0x0818eeb9 in ast_rtp_instance_destroy (instance=0x93bb0bc)
    at rtp_engine.c:231
#13 0xb654dc98 in __sip_destroy (p=0x93b23cc, lockowner=1, lockdialoglist=1)
    at chan_sip.c:6152
#14 0xb654e74d in sip_destroy (p=0x93b23cc) at chan_sip.c:6430
#15 0xb654fdbe in sip_destroy_fn (p=0x93b23cc) at chan_sip.c:6419
#16 0x0808f486 in internal_ao2_ref (user_data=<value optimized out>, 
    delta=<value optimized out>, file=<value optimized out>, line=539, 
    func=0x81f496e "__ao2_ref") at astobj2.c:461
#17 0xb652ce4a in dialog_unref_debug (p=0x0, 
    tag=0xb65d61e0 "Let's unbump the count in the unlink so the poor pvt can disappear if it is time", file=0xb65cac48 "chan_sip.c", line=3171, 
    func=0xb65d3e89 "dialog_unlink_all") at chan_sip.c:2329
#18 0xb6540437 in dialog_unlink_all (dialog=0x93b23cc) at chan_sip.c:3171
#19 0xb6540d1f in dialog_needdestroy (dialogobj=0x93b23cc, arg=0x0, flags=6)
    at chan_sip.c:18591
#20 0x08091334 in internal_ao2_callback (c=<value optimized out>, 
    flags=<value optimized out>, cb_fn=<value optimized out>, arg=0x0, 
    data=0x0, type=DEFAULT, tag=0x0, file=0x0, line=0, func=0x0)
    at astobj2.c:1083
#21 0x08091a1a in __ao2_callback (c=0x8f196ec, flags=6, 
    cb_fn=0xb6540ab0 <dialog_needdestroy>, arg=0x0) at astobj2.c:1188
#22 0xb6594f96 in do_monitor (data=0x0) at chan_sip.c:28033
#23 0x081d2cab in dummy_start (data=0x8f26fa8) at utils.c:1026
#24 0xb738b96e in start_thread (arg=0xb6653b70) at pthread_create.c:300
#25 0xb77bb98e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130
{noformat}

I can't reproduce the issue with thread debugging enabled and optimization disabled.

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