[webkit-changes] [WebKit/WebKit] 87c7b1: AX: Crash in AXTextMarker constructor.

[AndresGonzalezApple]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 87c7b11098edfd79e9a41c68ca0abfcd777accb4
      https://github.com/WebKit/WebKit/commit/87c7b11098edfd79e9a41c68ca0abfcd777accb4
  Author: Andres Gonzalez <andresg_22 at apple.com>
  Date:   2024-03-26 (Tue, 26 Mar 2024)

  Changed paths:
    M Source/WebCore/accessibility/AXTreeStore.h

  Log Message:
  -----------
  AX: Crash in AXTextMarker constructor.
https://bugs.webkit.org/show_bug.cgi?id=271731
<rdar://problem/125441080>

Reviewed by Tyler Wilcock.

When creating an AXTextMarker or AXTextMarkerRange from a client-provided AXTextMarkerRef, we cannot assume that the tree ID in the data provided is valid. This patch adds checks for valid tree IDs in the corresponding AXTreeStore methods.

* Source/WebCore/accessibility/AXTreeStore.h:
(WebCore::AXTreeStore<T>::axObjectCacheForID):
(WebCore::AXTreeStore<T>::isolatedTreeForID):

Canonical link: https://commits.webkit.org/276722@main



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