[asterisk-bugs] [JIRA] (ASTERISK-20149) Crash when faxing SIP to SIP with strictrtp set to yes

[Michal Rybarik (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-20149?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=215152#comment-215152 ] 

Michal Rybarik edited comment on ASTERISK-20149 at 2/11/14 4:46 PM:
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I am running patched code for 11 days... Previously, I had segfault every 1-2 days, now still running.... Around 24000 calls processed already... 

It is not related only to SIP to SIP, this can also happen in SIP to DAHDI calls, and probably ANY to ANY protocol too. Segfault happens because res_fax_spandsp sometimes pass alaw/ulaw frames to libspandsp, which expects only slinear. This patch is adding conversion from alaw/ulaw to slinear before frame is passed to libspandsp. 
https://issues.asterisk.org/jira/secure/attachment/49214/spandsp_g711decode.diff
So, if your Asterisk sometimes crashes with T38gateway enabled, during fax tone detection, please try this patch, and write comment here if it helps you too.... 
                
      was (Author: pixall):
    I am running patched code for 11 days... Previously, I had segfault every 1-2 days, now still running.... Around 24000 calls processed already... 

So, if your Asterisk sometimes crashes with T38gateway enabled, during fax tone detection, please try this patch, and write comment here if it helps you too.... It is not related only to SIP to SIP, this can also happen in SIP to DAHDI calls, and probably ANY to ANY protocol too. Segfault happens because res_fax_spandsp sometimes pass alaw/ulaw frames to libspandsp, which expects only slinear. This patch is adding conversion from alaw/ulaw to slinear before frame is passed to libspandsp. 
https://issues.asterisk.org/jira/secure/attachment/49214/spandsp_g711decode.diff

                  
> Crash when faxing SIP to SIP with strictrtp set to yes
> ------------------------------------------------------
>
>                 Key: ASTERISK-20149
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-20149
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Resources/res_fax, Resources/res_fax_spandsp
>    Affects Versions: 10.6.0, 11.5.0
>            Reporter: Alexandr Gordeev
>            Assignee: Alexandr Gordeev
>            Severity: Critical
>         Attachments: backtrace.1346914431.1467.11, backtrace_20120719.txt, backtrace_20120720.txt, backtrace_20121205.txt, backtrace_20130814_2.txt, backtrace_20130814.txt, full_20120719.txt, full_20120720.txt, spandsp_g711decode.diff, t38_gw_crash_dec_20.backtrace, t38_gw_crash_dec_20.pcap.gz, traffic_20120719.dump, traffic_20120720.dump
>
>
> Crash Asterisk (2) when faxing.
> Schema :
> Other PBX - > pri - > Asterisk 10.6.0 (1) - > sip,g729,t38 - > Asterisk 10.6.0 (2) - > sip,g711,t30- > Other PBX

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