Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 65057afee9f465159d8227d52d16d62c2c255d54
https://github.com/WebKit/WebKit/commit/65057afee9f465159d8227d52d16d62c2c255d54
Author: Vitaly Dyachkov <[email protected]>
Date: 2026-01-26 (Mon, 26 Jan 2026)
Changed paths:
M Source/WebCore/Modules/web-locks/WebLockManager.cpp
M Source/WebCore/bindings/js/JSDOMPromise.cpp
Log Message:
-----------
Fix crash in `DOMPromise::whenPromiseIsSettled` during worker termination
https://bugs.webkit.org/show_bug.cgi?id=305762
Reviewed by Youenn Fablet.
`DOMPromise::whenPromiseIsSettled()` could crash when called during
worker shutdown due to two issues:
1. The `waitingPromise` in `WebLockManager::didCompleteLockRequest()`
could be suspended during worker termination, leading to invalid
access when the promise settled handler was invoked.
2. `JSBoundFunction::create()` can return `nullptr` in some cases, but
the result was passed directly to `performPromiseThen()` without
validation.
This patch adds necessary checks to prevent crashes in these scenarios.
* Source/WebCore/Modules/web-locks/WebLockManager.cpp:
(WebCore::WebLockManager::didCompleteLockRequest):
* Source/WebCore/bindings/js/JSDOMPromise.cpp:
(WebCore::DOMPromise::whenPromiseIsSettled):
Canonical link: https://commits.webkit.org/306190@main
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