[Webkit-unassigned] [Bug 211539] New: SIGILL @ WebCore::Shape::createRasterShape -- DOS ASAN

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=211539

            Bug ID: 211539
           Summary: SIGILL @ WebCore::Shape::createRasterShape -- DOS ASAN
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: pgyanchandani at apple.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

The crash is happening in Shape::createRasterShape function. This is a release assert RELEASE_ASSERT(imageData && imageData->data()); in code. 

The reason for crash is because ImageData::create returns NULL, because dataSize.hasOverFlowed() is TRUE. 

In the failure case intRect  size, width is huge value and when its multiplied with dataSize (=4) and height, that results in overflow.

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