--- xnu/xnu-2050.22.13/libkern/c++/OSData.cpp
+++ xnu/xnu-3248.30.4/libkern/c++/OSData.cpp
@@ -49,38 +49,30 @@
 
 #define EXTERNAL ((unsigned int) -1)
 
-#if OSALLOCDEBUG
-extern int debug_container_malloc_size;
-#define ACCUMSIZE(s) do { debug_container_malloc_size += (s); } while(0)
-#else
-#define ACCUMSIZE(s)
-#endif
-
-struct OSData::ExpansionData
-{
-    DeallocFunction deallocFunction;
-    bool            disableSerialization;
-};
-
 bool OSData::initWithCapacity(unsigned int inCapacity)
 {
+    if (data)
+    {
+        OSCONTAINER_ACCUMSIZE(-((size_t)capacity));
+	if (!inCapacity || (capacity < inCapacity))
+	{
+	    // clean out old data's storage if it isn't big enough
+	    kfree(data, capacity);
+	    data = 0;
+	    capacity = 0;
+	}
+    }
+
     if (!super::init())
         return false;
 
-    if (data && (!inCapacity || capacity < inCapacity) ) {
-        // clean out old data's storage if it isn't big enough
-        kfree(data, capacity);
-        data = 0;
-        ACCUMSIZE(-capacity);
-    }
-
     if (inCapacity && !data) {
-        data = (void *) kalloc(inCapacity);
+        data = (void *) kalloc_container(inCapacity);
         if (!data)
             return false;
         capacity = inCapacity;
-        ACCUMSIZE(inCapacity);
-    }
+    }
+    OSCONTAINER_ACCUMSIZE(capacity);
 
     length = 0;
     if (inCapacity < 16)
@@ -195,7 +187,7 @@
 {
     if (capacity != EXTERNAL && data && capacity) {
         kfree(data, capacity);
-        ACCUMSIZE( -capacity );
+        OSCONTAINER_ACCUMSIZE( -((size_t)capacity) );
     } else if (capacity == EXTERNAL) {
 	DeallocFunction freemem = reserved ? reserved->deallocFunction : NULL;
 	if (freemem && data && length) {
@@ -224,24 +216,29 @@
 unsigned int OSData::ensureCapacity(unsigned int newCapacity)
 {
     unsigned char * newData;
+    unsigned int finalCapacity;
 
     if (newCapacity <= capacity)
         return capacity;
 
-    newCapacity = (((newCapacity - 1) / capacityIncrement) + 1)
+    finalCapacity = (((newCapacity - 1) / capacityIncrement) + 1)
                 * capacityIncrement;
 
-    newData = (unsigned char *) kalloc(newCapacity);
-    
+    // integer overflow check
+    if (finalCapacity < newCapacity)
+        return capacity;
+
+    newData = (unsigned char *) kalloc_container(finalCapacity);
+
     if ( newData ) {
-        bzero(newData + capacity, newCapacity - capacity);
+        bzero(newData + capacity, finalCapacity - capacity);
         if (data) {
             bcopy(data, newData, capacity);
             kfree(data, capacity);
         }
-        ACCUMSIZE( newCapacity - capacity );
+        OSCONTAINER_ACCUMSIZE( ((size_t)finalCapacity) - ((size_t)capacity) );
         data = (void *) newData;
-        capacity = newCapacity;
+        capacity = finalCapacity;
     }
 
     return capacity;
@@ -446,20 +443,20 @@
 {
     if (!reserved)
     {
-    	reserved = (typeof(reserved)) kalloc(sizeof(ExpansionData));
+    	reserved = (typeof(reserved)) kalloc_container(sizeof(ExpansionData));
+        if (!reserved) return;
+        bzero(reserved, sizeof(ExpansionData));
+    }
+    reserved->deallocFunction = func;
+}
+
+void OSData::setSerializable(bool serializable)
+{
+    if (!reserved)
+    {
+    	reserved = (typeof(reserved)) kalloc_container(sizeof(ExpansionData));
 	if (!reserved) return;
 	bzero(reserved, sizeof(ExpansionData));
     }
-    reserved->deallocFunction = func;
-}
-
-void OSData::setSerializable(bool serializable)
-{
-    if (!reserved)
-    {
-    	reserved = (typeof(reserved)) kalloc(sizeof(ExpansionData));
-	if (!reserved) return;
-	bzero(reserved, sizeof(ExpansionData));
-    }
     reserved->disableSerialization = (!serializable);
 }