[Webkit-unassigned] [Bug 249061] New: Fix use-after-free in WebCore::StyleGradientImage() constructor

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=249061

            Bug ID: 249061
           Summary: Fix use-after-free in WebCore::StyleGradientImage()
                    constructor
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: SVG
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ddkilzer at webkit.org
                CC: sabouhallawa at apple.com, zimmermann at kde.org

Fix use-after-free in WebCore::StyleGradientImage() constructor in Source/WebCore/rendering/style/StyleGradientImage.cpp.

```
StyleGradientImage::StyleGradientImage(Data&& data, CSSGradientColorInterpolationMethod colorInterpolationMethod, Vector
<StyleGradientImageStop>&& stops)
    : StyleGeneratedImage { Type::GradientImage, StyleGradientImage::isFixedSize }
    , m_data { WTFMove(data) }
    , m_colorInterpolationMethod { colorInterpolationMethod }
    , m_stops { WTFMove(stops) }
    , m_knownCacheableBarringFilter { stopsAreCacheable(stops) }  // FIXME: Use-after-move of `stops`.
{
}
```

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