Bug#1122640: Data Race in QReadWriteLock

[Miao Wang <shankerwangmiao@gmail.com>]

Source: qt6-base
Version: 6.8.2+dfsg-9+deb13u1
Severity: important
Tags: patch, upstream, fixed-upstream, ftbfs
Control: found -1 6.9.2+dfsg-3

Dear maintainer,

I recently discovered a data race in QReadWriteLock which can cause 
programs hang on weakly ordering architectures. This bug was reported 
to the upstream [1] and the fix is available in commit 4fd88011fa79 
("QReadWriteLock: fix data race on weakly-ordered memory
architectures") [2]. Grateful if you can integrate the commit into
the current Debian source package and also fix this in stable-pu.

Cheers,

Miao Wang

[1]: https://qt-project.atlassian.net/browse/QTBUG-142321
[2]: https://codereview.qt-project.org/gitweb?p=qt/qtbase.git;a=commit;h=4fd88011fa7975ce64d5648698a234f85bac359c