Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 4a5a2da864a3b93b8b5119b48d020f54b67babe1
https://github.com/WebKit/WebKit/commit/4a5a2da864a3b93b8b5119b48d020f54b67babe1
Author: Tyler Wilcock <[email protected]>
Date: 2026-04-22 (Wed, 22 Apr 2026)
Changed paths:
M Source/WebCore/accessibility/AXLiveRegionManager.cpp
Log Message:
-----------
AX: AXLiveRegionManager::buildLiveRegionSnapshot can hang when iterating
giant live regions
https://bugs.webkit.org/show_bug.cgi?id=312823
rdar://175190959
Reviewed by Joshua Hoffman.
Web developers can pack arbitrary amounts of content into a live region, causing
buildLiveRegionSnapshot to walk an unbounded accessibility tree and hang the web
content process. Add a shared counter (maximumSnapshotObjects = 512) that caps
the
total objects visited across both the main buildObjectList walk and the
collectDescendants
walk for atomic regions.
* Source/WebCore/accessibility/AXLiveRegionManager.cpp:
(WebCore::AXLiveRegionManager::buildLiveRegionSnapshot const):
Canonical link: https://commits.webkit.org/311773@main
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