Merge 97214 - Heap buffer overflow in Webaudio FFTFrame::doFFT

Source/WebCore/platform/audio/HRTFKernel.cpp

Index: Source/WebCore/platform/audio/HRTFKernel.cpp
===================================================================
--- Source/WebCore/platform/audio/HRTFKernel.cpp	(revision 97216)
+++ Source/WebCore/platform/audio/HRTFKernel.cpp	(working copy)
@@ -51,7 +51,10 @@
         
     float* impulseP = channel->data();
     
-    ASSERT(channel->length() >= analysisFFTSize);
+    bool isSizeGood = channel->length() >= analysisFFTSize;
+    ASSERT(isSizeGood);
+    if (!isSizeGood)
+        return 0;
     
     // Check for power-of-2.
     ASSERT(1UL << static_cast<unsigned>(log2(analysisFFTSize)) == analysisFFTSize);