Branch: refs/heads/3.4
Home: https://github.com/OpenSIPS/opensips
Commit: 722547d431765c5bd7ec802e27ece19fadd81fa2
https://github.com/OpenSIPS/opensips/commit/722547d431765c5bd7ec802e27ece19fadd81fa2
Author: Liviu Chircu <[email protected]>
Date: 2024-07-22 (Mon, 22 Jul 2024)
Changed paths:
M modules/presence/subscribe.c
Log Message:
-----------
presence: Fix subtle race condition in update_db_subs()
While walking the list and collecting expired subscriptions, it is
incorrect to temporarily release, then re-acquire the lock and still
make use of the @s or @prev_s pointers afterwards, as the list may have
changed in the meantime!
The fix is to detach and collect any expired subs, then walk & handle
them in a separate iteration.
(cherry picked from commit b8e0250bc957bb408f23317012716524129f1fa9)
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