[Webkit-unassigned] [Bug 64257] New: Signed arithmetic bug in dataTransfer32

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=64257

           Summary: Signed arithmetic bug in dataTransfer32
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: loki at webkit.org
                CC: zherczeg at webkit.org


There is an arithmetic bug in dataTransfer32.

If the offset of dataTransfer is half of the addressable memory space on a 32-bit machine (-2147483648 = 0x80000000) a load instruction is emitted with a wrong zero offset.

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