From: Alessio Podda <alessio@isc.org>
Date: Wed, 15 Jul 2026 09:47:57 +0000 (+0000)
Subject: fix: dev: Change catz coo locking
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b0a4f6b39d7b1e881f01cb5ce4faf1a568b50f9a;p=thirdparty%2Fbind9.git

fix: dev: Change catz coo locking

Catalog zones might need to inspect the change-of-ownership records
of other catalog zones, which required to release the lock in the
middle of certain operations, leading to possible race conditions.

Since the operations on change-of-ownership records are limited, we
can instead use a design with a second lock protecting the
change-of-ownership records on read. We structure the API so that
holding two change-of-ownership locks at the same time is impossible.

Closes #6131

Merge branch '6131-catz-dns__catz_zones_merge-uaf-fix-v2' into 'main'

See merge request isc-projects/bind9!12277
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