[asterisk-bugs] [JIRA] (ASTERISK-21242) Segfault when T.38 re-invite retransmission receives 200 OK

[Ashley Winters (JIRA)]

Ashley Winters created ASTERISK-21242:
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             Summary: Segfault when T.38 re-invite retransmission receives 200 OK
                 Key: ASTERISK-21242
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-21242
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Resources/res_fax, Resources/res_fax_spandsp
    Affects Versions: 11.2.1
         Environment: CentOS 6.2 x86_64
            Reporter: Ashley Winters
            Severity: Critical


If res_fax falls back to audio after timing out on T.38 upgrade, and chan_sip continues retrying the re-INVITE, and the remote end responds to one of the retransmissions (after res_fax times out) with a 200 OK, a T.38 frame will be delivered to the res_fax_spandsp driver without the t38 subsystem being initialized.

This results in a segfault.

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