[asterisk-bugs] [JIRA] (ASTERISK-28534) Segmentation fault when there is no priority for an extension

[Kevin Harwell (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-28534?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=248002#comment-248002 ] 

Kevin Harwell commented on ASTERISK-28534:
------------------------------------------

Is this a realtime configuration as it looks like it's calling into it? If so what's the table definition (was the alembic definition used?) and how did the data get inserted?

If not, I've tried putting that in _extensions.conf_ and it did not crash. I did receive the following messages at startup:
{noformat}
[2019-09-12 18:07:22] NOTICE[32679]: pbx.c:2967 pbx_extension_helper: Cannot find extension '_30[X+]XXXXXXXX!' in context ''
[2019-09-12 18:07:22] WARNING[32679]: pbx_config.c:1824 pbx_load_config: Invalid priority/label '' at line 5 of extensions.conf
{noformat}

> Segmentation fault when there is no priority for an extension
> -------------------------------------------------------------
>
>                 Key: ASTERISK-28534
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-28534
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: PBX/pbx_config
>    Affects Versions: 16.5.0
>         Environment: CentOS Linux release 7.6.1810
> Kernel: 3.10.0-957.27.2.el7.x86_64
>            Reporter: Timothy Vanderaerden
>            Severity: Minor
>
> When there is no priority given for an extension Asterisk will crash with a Segmentation fault. The config below will cause this behavior.
> {code}
> exten => _30[X+]XXXXXXXX!,
> {code}
> This is of course bad configuration but it shouldn't cause a crash.
> Below you will find gdb backtrace.
> {code:title=gdb}
> [Thread debugging using libthread_db enabled]
> Using host libthread_db library "/usr/lib64/libthread_db.so.1".
> Core was generated by `asterisk -U asterisk -g -c'.
> Program terminated with signal 11, Segmentation fault.
> #0  __strlen_sse42 () at ../sysdeps/x86_64/multiarch/strlen-sse4.S:31
> 31		pcmpeqb	(%rdi), %xmm1
> {code}
> And the relevant Asterisk coredump.
> {code:title=core-brief.txt}
> Thread 1 (Thread 0x7f759588b900 (LWP 1380)):
> #0  0x00007f75925df10f in __strlen_sse42 () at ../sysdeps/x86_64/multiarch/strlen-sse4.S:31
> #1  0x00000000005c606b in realtime_arguments_to_fields2 (file=0x646299 "config.c", lineno=3220, func=0x6724f0 <__PRETTY_FUNCTION__.18004> "realtime_arguments_to_fields2", filename=0x628614 "", value=0x0, name=0x7$
> #2  0x00000000005c606b in realtime_arguments_to_fields2 (ap=ap at entry=0x7ffec6949158, result=result at entry=0x7ffec6949140, skip=-1) at config.c:3220
> #3  0x00000000005cda43 in ast_load_realtime (family=family at entry=0x7f7548b072ab "extensions") at config.c:3318
> #4  0x00007f7548b05e2a in realtime_switch_common (table=table at entry=0x7f7548b072ab "extensions", context=context at entry=0x0, exten=exten at entry=0x7ffec694a9e0 "_30[X+]XXXXXXXX!", priority=priority at entry=0, mode=mod$
> #5  0x00007f7548b06923 in realtime_common (context=<optimized out>, exten=0x7ffec694a9e0 "_30[X+]XXXXXXXX!", priority=0, data=<optimized out>, mode=<optimized out>) at pbx_realtime.c:261
> #6  0x00007f7548b06b17 in realtime_exists (chan=<optimized out>, context=<optimized out>, exten=<optimized out>, priority=<optimized out>, callerid=<optimized out>, data=<optimized out>) at pbx_realtime.c:291
> #7  0x000000000051c704 in pbx_find_extension (chan=chan at entry=0x0, bypass=bypass at entry=0x3aabc30, q=q at entry=0x7ffec69497f0, context=context at entry=0x0, exten=exten at entry=0x7ffec694a9e0 "_30[X+]XXXXXXXX!", priority$
> #8  0x0000000000527475 in pbx_extension_helper (c=c at entry=0x0, con=con at entry=0x3aabc30, exten=exten at entry=0x7ffec694a9e0 "_30[X+]XXXXXXXX!", label=label at entry=0x7f753093bd43 "", callerid=callerid at entry=0x0, combi$
> #9  0x0000000000527685 in ast_findlabel_extension2 (c=c at entry=0x0, con=con at entry=0x3aabc30, exten=exten at entry=0x7ffec694a9e0 "_30[X+]XXXXXXXX!", label=label at entry=0x7f753093bd43 "", callerid=callerid at entry=0x0) a$
> #10 0x00007f7530937936 in pbx_load_config (config_file=0x7f753093dd70 <config> "extensions.conf") at pbx_config.c:1823
> #11 0x00007f7530939fbe in pbx_load_module () at pbx_config.c:2101
> #12 0x00007f753093bb2b in load_module () at pbx_config.c:2130
> #13 0x00000000004f9ed5 in start_resource (mod=mod at entry=0x34f9e70) at loader.c:1711
> #14 0x00000000004fa6de in start_resource_attempt (mod=0x34f9e70) at loader.c:1685
> #15 0x00000000004fa6de in start_resource_attempt (mod=0x34f9e70, count=0x7ffec694cdb0) at loader.c:1887
> #16 0x00000000004fd563 in load_modules (mod_count=0x7ffec694cdb0, resources=0x7ffec694cde0) at loader.c:1984
> #17 0x00000000004fd563 in load_modules (mod_count=<synthetic pointer>, load_order=0x7ffec694cdd0) at loader.c:2166
> #18 0x00000000004fd563 in load_modules () at loader.c:2379
> #19 0x0000000000438405 in main (isroot=<optimized out>, rungroup=<optimized out>, runuser=<optimized out>) at asterisk.c:4148
> #20 0x0000000000438405 in main (argc=<optimized out>, argv=<optimized out>) at asterisk.c:3919
> {code}
> I wasn't sure if I should include the full Asterisk coredump or if this is enough. Let me know if you need more.



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