Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 70bf9992ad6a0ce27269c388ff2437b31acfc2b0
https://github.com/WebKit/WebKit/commit/70bf9992ad6a0ce27269c388ff2437b31acfc2b0
Author: Youenn Fablet <[email protected]>
Date: 2026-03-05 (Thu, 05 Mar 2026)
Changed paths:
M Source/WebCore/workers/WorkerRunLoop.cpp
Log Message:
-----------
WorkerOrWorkletScriptController::loadModuleSynchronously can trigger a
nullptr crash
rdar://171676805
https://bugs.webkit.org/show_bug.cgi?id=309182
Reviewed by Chris Dumez.
While WorkerOrWorkletScriptController::loadModuleSynchronously is executing the
last steps, it is spinning the worker main run loop, waiting for the script to
be retrieved.
During that time, the context might go away, meaning that
WorkerOrWorkletGlobalScope::clearScript is called.
In this case, triggering a microtask checkpoint will trigger a nullptr crash,
as the script is gone and there is a need to recreate the micro task queue.
To prevent this, we update WorkerMainRunLoop::runInMode to return false when
the run loop is terminated, which happens in WorkerOrWorkletThread::stop, just
after WorkerOrWorkletGlobalScope::clearScript call.
Canonical link: https://commits.webkit.org/308701@main
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