[asterisk-bugs] [JIRA] (ASTERISK-23990) app_voicemail crash when using IMAP greetings and forwarding messages

[Ben Smithurst (JIRA)]

Ben Smithurst created ASTERISK-23990:
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             Summary: app_voicemail crash when using IMAP greetings and forwarding messages
                 Key: ASTERISK-23990
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-23990
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Applications/app_voicemail/IMAP
    Affects Versions: 11.8.1
            Reporter: Ben Smithurst


Asterisk currently crashes when trying to forward a message to another user - I think the combination of IMAP storage + IMAP greetings is the problem.

What seems to happen is that Asterisk changes to the Greetings folder in the *source* mailbox instead of the destination.  It then doesn't change back, tries to retrieve message X (the one being forwarded) from Greetings, which doesn't exist, and libc-client calls abort().

The reason appears to be due to the per-thread 'interactive' vmstate storage, Asterisk seems to assume that the per-thread requests will always be for the same mailbox, but when forwarding, that's not true.  So the fix is to check that the imapuser/mailbox/context (as appropriate) matches, when obtaining the interactive per-thread state.

We can easily reproduce this problem, it appears to happen every time during our tests.



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