[asterisk-dev] Asterisk 1.8 Deadlock between timerfd and channel list

[Mark Murawski]

Er. Thread 0xb5feab70 backtrace is actually:

#0  0xffffe424 in __kernel_vsyscall ()
#1  0xb7e715fb in read () at ../sysdeps/unix/syscall-template.S:82
#2  0xb6963dde in timerfd_timer_ack (handle=30, quantity=1) at 
res_timing_timerfd.c:166
#3  0x0817fc51 in ast_timer_ack (handle=0x86085b8, quantity=1) at 
timing.c:169
#4  0x080b00a5 in __ast_read (chan=0xeacb690, dropaudio=0) at channel.c:4095
#5  0x080b1d1a in ast_read (chan=0xeacb690) at channel.c:4540
#6  0xb698056f in wait_for_answer (in=0xeacb690, outgoing=0xec44530, 
to=0xb5fe4a94, peerflags=0xb5fe4d38, opt_args=0xb5fe42b0, pa=0xb5fe4318, 
num_in=0xb5fe4a84, result=0xb5fe4314,
     dtmf_progress=0x0, ignore_cc=1) at app_dial.c:1351
#7  0xb698618c in dial_exec_full (chan=0xeacb690, data=0xb5fe5142 
"Local/s at _CallQueue_Infinite_Wait,30,m", peerflags=0xb5fe4d38, 
continue_exec=0x0) at app_dial.c:2287
#8  0xb6989148 in dial_exec (chan=0xeacb690, data=0xb5fe5142 
"Local/s at _CallQueue_Infinite_Wait,30,m") at app_dial.c:2794
#9  0x0812fff1 in pbx_exec (c=0xeacb690, app=0xea71be0, data=0xb5fe5142 
"Local/s at _CallQueue_Infinite_Wait,30,m") at pbx.c:1406
#10 0xb77c4f95 in handle_exec (chan=0xeacb690, agi=0xb5fe59e0, argc=3, 
argv=0xb5fe4ec8) at res_agi.c:2393
#11 0xb77c7643 in agi_handle_command (chan=0xeacb690, agi=0xb5fe59e0, 
buf=0xb5fe5138 "EXEC", dead=0) at res_agi.c:3275
#12 0xb77c7e64 in run_agi (chan=0xeacb690, request=0xb5fe59a0 
"agi://127.0.0.1:2000", agi=0xb5fe59e0, pid=-1, status=0xb5fe59d4, 
dead=0, argc=1, argv=0xb5fe59f8) at res_agi.c:3435
#13 0xb77c9110 in agi_exec_full (chan=0xeacb690, data=0xb5fe7dac 
"agi://127.0.0.1:2000", enhanced=0, dead=0) at res_agi.c:3722
#14 0xb77c9254 in agi_exec (chan=0xeacb690, data=0xb5fe7dac 
"agi://127.0.0.1:2000") at res_agi.c:3756
#15 0x0812fff1 in pbx_exec (c=0xeacb690, app=0x854c930, data=0xb5fe7dac 
"agi://127.0.0.1:2000") at pbx.c:1406
#16 0x081388df in pbx_extension_helper (c=0xeacb690, con=0x0, 
context=0xeacb9fc "CallQueue_Join", exten=0xeacba4c "s", priority=8, 
label=0x0, callerid=0xeab6680 "14", action=E_SPAWN,
     found=0xb5fea230, combined_find_spawn=1) at pbx.c:4085
#17 0x0813a132 in ast_spawn_extension (c=0xeacb690, context=0xeacb9fc 
"CallQueue_Join", exten=0xeacba4c "s", priority=8, callerid=0xeab6680 
"14", found=0xb5fea230, combined_find_spawn=1)
     at pbx.c:4608
#18 0x0813aa26 in __ast_pbx_run (c=0xeacb690, args=0x0) at pbx.c:4706
#19 0x0813c2fc in pbx_thread (data=0xeacb690) at pbx.c:5024
#20 0x0818a585 in dummy_start (data=0xec618a8) at utils.c:973
#21 0xb7c73c39 in start_thread (arg=0xb5feab70) at pthread_create.c:304
#22 0xb7e808ee in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130