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#### Checklist: <!-- Go over all points below, and after creating the PR, tick the checkboxes that apply --> - [X] PR should be backported to stable branches - [X] Tested changes locally - [ ] Related to issue #XXXX (replace XXXX with an open issue number)

#### Description <!-- Describe your changes in detail --> We've recently been exeperiencing a core dump in dialog module. The core dump was caused by trying to terminate via rpc command a dialog that had just been terminated by one of the parties sending a BYE. That's because send_bye threats a deleted dialog as a non confimed one (https://github.com/kamailio/kamailio/blob/404b47791678c4eaccd4cfc7a83e0bb97a...) and tries then to access a transaction that does not exist anymore (https://github.com/kamailio/kamailio/blob/404b47791678c4eaccd4cfc7a83e0bb97a...) and crashes. You can view, comment on, or merge this pull request online at:

https://github.com/kamailio/kamailio/pull/3714

-- Commit Summary --

* dialog: don't send the BYE if dialog is in deleted state

-- File Changes --

M src/modules/dialog/dlg_req_within.c (7)

-- Patch Links --

https://github.com/kamailio/kamailio/pull/3714.patch https://github.com/kamailio/kamailio/pull/3714.diff