[asterisk-bugs] [JIRA] (ASTERISK-21350) Segfault on ast_channel_tech(chan)->send_digit_begin

[Rusty Newton (JIRA)]

Rusty Newton created ASTERISK-21350:
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             Summary: Segfault on ast_channel_tech(chan)->send_digit_begin
                 Key: ASTERISK-21350
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-21350
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Core/Channels
    Affects Versions: 11.2.1
         Environment: CentOS 6.3
            Reporter: Ashley Winters
            Severity: Critical


Calling {{ast_channel_tech(chan)}} multiple times in a row while chan is unlocked is a race condition. I experienced a segfault when the tech changed to {{null_tech}} between the null check and the function-pointer dereference.

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