[asterisk-bugs] [JIRA] (ASTERISK-26738) Frequent segfaults since activation of DNS SRV, in pjsip_auth_clt_reinit_req at /pjsip/sip_auth_client.c, and pj_atomic_inc_and_get at pj/os_core_unix.c

[Richard Mudgett (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-26738?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=235236#comment-235236 ] 

Richard Mudgett commented on ASTERISK-26738:
--------------------------------------------

The backtraces aren't enough to find the issue.  I will need debug logs showing what is happening with the DNS lookups and the corresponding tdata that was involved in the crash.  Using Asterisk 13.13.1 please apply all four patches on ASTERISK-26669 and the patch "[PATCH] pjproject_bundled: Fix missing inclusion of symbols" to get symbols of libasteriskpj.  Do not apply the patch from ASTERISK-26675 as that patch tries to cover up the problem after it has happened.

Since most of the patches on ASTERISK-26669 are to pjproject you must use bundled pjproject for them to work.  The patches are applied when the pjproject source files are unzipped.  To ensure that they actually get applied do this from the Asterisk source root directory:
# cd third-party/pjproject
# make distclean
# cd ../..
# ./configure --with-pjproject-bundled --with-externals-cache=/home/rmudgett/cache_pjproject <-- Or whatever command you use to configure for bundled pjproject
# make && sudo make install

Thanks

> Frequent segfaults since activation of DNS SRV, in pjsip_auth_clt_reinit_req at /pjsip/sip_auth_client.c, and pj_atomic_inc_and_get at pj/os_core_unix.c
> --------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: ASTERISK-26738
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-26738
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Resources/res_pjsip
>    Affects Versions: 13.13.1
>         Environment: Centos 6 64bit
> FreePBX 13.0.190.7
> IPv4 and IPv6
> dual core processor
>            Reporter: Michael Maier
>            Assignee: Richard Mudgett
>            Severity: Critical
>         Attachments: backtrace-2017-01-20T21.21.25.txt, backtrace-2017-01-20T23.21.00+0100.txt, backtrace-2017-01-21T05.19.00+0100.txt, backtrace-2017-01-21T12.43.36+0100.txt, backtrace-2017-02-14T21.29.39+0100.txt, debug-2017-01-21T12.43.36+0100.txt
>
>
> After switching to DNS SRV w/ 5 parallel trunks I'm getting frequent segfaults like the attached one. Backtrace is built on base of patched Schmooze RPM source package:
> - Patch to get libasteriskpj.so.2 symbols
> - Patch from ASTERISK-26675 (segfault has been seen already w/o this patch - but it doesn't obviously fix this problem)
> Parallel running tcpdump shows, that REGISTER is sent at the time of the crash.
> In detail:
> - The DNS SRV entry has two hostnames (see ASTERISK-26735). All the time before the crash, ipaddress 217.0.23.108 is used for REGISTER.
> - At the moment of the crash, 2(!!) REGISTERS are sent nearly at the same time (0.01s difference) for the same trunk! The first to 217.0.23.140(!), the second to the usual 217.0.23.108. The answer from 217.0.23.108 comes first (200 ok), the answer from 217.0.23.140 comes 0.09s later and is 401 unauthorized. That's the end. Now the crash appears.



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