OSV-2022-327 Stack-use-after-return in QSemaphore::release

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=46525 The issue already existed before oss-fuzz could reproduce it. oss-fuzz found it after qdrawhelper routines were made multithreaded. There might be ways to trigger the issue before that. Crash type: Stack-use-after-return...