[webkit-changes] [WebKit/WebKit] bac31e: Null pointer dereference in WebCore::ImageDocument...

[lericaa]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: bac31e80659aa2caacbacfbba84a4053e322ed6f
      https://github.com/WebKit/WebKit/commit/bac31e80659aa2caacbacfbba84a4053e322ed6f
  Author: Erica Li <lerica at apple.com>
  Date:   2024-02-29 (Thu, 29 Feb 2024)

  Changed paths:
    A LayoutTests/fast/images/imageDocument-appendBytes-crash-expected.txt
    A LayoutTests/fast/images/imageDocument-appendBytes-crash.html
    M Source/WebCore/html/ImageDocument.cpp

  Log Message:
  -----------
  Null pointer dereference in WebCore::ImageDocument::createDocumentStructure.
https://bugs.webkit.org/show_bug.cgi?id=270283.
rdar://122779661.

Reviewed by Chris Dumez.

Adding null check to prevent the cases where local frame would be detached during createDocumentStructure.

* LayoutTests/fast/images/imageDocument-appendBytes-crash-expected.txt: Added.
* LayoutTests/fast/images/imageDocument-appendBytes-crash.html: Added.
* Source/WebCore/html/ImageDocument.cpp:
(WebCore::ImageDocument::updateDuringParsing):
(WebCore::ImageDocument::createDocumentStructure):

Canonical link: https://commits.webkit.org/275537@main



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