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v1.1.5 - Fix CRITICAL segfault: Use wrapper nodes for no-kind-filter subscriptions
laantungir released this
2026-02-01 16:37:07 +00:00 The kind index optimization in v1.1.4 introduced a critical bug that caused
segmentation faults in production. The bug was in add_subscription_to_kind_index()
which directly assigned sub->next for no-kind-filter subscriptions, corrupting
the main active_subscriptions linked list.Root Cause:
- subscription_t has only ONE 'next' pointer used by active_subscriptions list
- Code tried to reuse 'next' for no_kind_filter_subs list
- This overwrote the active_subscriptions linkage, breaking list traversal
- Result: segfaults when iterating subscriptions
Fix:
- Added no_kind_filter_node_t wrapper structure (like kind_subscription_node_t)
- Changed no_kind_filter_subs from subscription_t* to no_kind_filter_node_t*
- Updated add/remove functions to use wrapper nodes
- Updated broadcast function to iterate through wrapper nodes
This follows the same pattern already used for kind_index entries and
prevents any corruption of the subscription structure's next pointer.Downloads