[OpenSIPS-Devel] [OpenSIPS/opensips] c0edd5: dialog: fix crash when receiving replicated cseq u...

[Vlad Pătrașcu]

  Branch: refs/heads/3.1
  Home:   https://github.com/OpenSIPS/opensips
  Commit: c0edd56aa5c5baa47bcc15d58ec143f1177380c6
      https://github.com/OpenSIPS/opensips/commit/c0edd56aa5c5baa47bcc15d58ec143f1177380c6
  Author: Vlad Patrascu <vladp at opensips.org>
  Date:   2022-01-25 (Tue, 25 Jan 2022)

  Changed paths:
    M modules/dialog/dlg_replication.c

  Log Message:
  -----------
  dialog: fix crash when receiving replicated cseq update

Prevent crash when receiving a cseq update for an unknown dialog.
The dialog may be already deleted due to timeout or other unexpected
race conditions.

Fixes #2651

(cherry picked from commit bd7f5e4b7ab215c4affe72e927013f0033088836)