[Webkit-unassigned] [Bug 205943] New: JSArrayBufferView.h: Multiplication result converted to larger type

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=205943

            Bug ID: 205943
           Summary: JSArrayBufferView.h: Multiplication result converted
                    to larger type
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: msaboff at apple.com

Summary:
JSArrayBufferView.h: Multiplication result converted to larger type: Multiplication result may overflow 'unsigned int' before it is converted to 'unsigned long'.

    static size_t sizeOf(uint32_t length, uint32_t elementSize)
    {
        return (length * elementSize + sizeof(EncodedJSValue) - 1)
Multiplication result may overflow 'unsigned int' before it is converted to 'unsigned long'.
            & ~(sizeof(EncodedJSValue) - 1);
    }

fix: cast length to size_t before multiplication.

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