--- src/kernel/qpixmap_x11.cpp.josh	2006-10-13 23:30:27.000000000 -0400
+++ src/kernel/qpixmap_x11.cpp.josh	2006-10-14 00:31:01.000000000 -0400
@@ -1758,6 +1758,12 @@ QPixmap QPixmap::xForm( const QWMatrix &
 	dbpl = ((w*bpp+31)/32)*4;
     dbytes = dbpl*h;
 
+    if (dbytes != (long long) dbpl*h) { // Integer overflow detection
+        QPixmap pm;
+        pm.data->bitmap = data->bitmap;
+        return pm;
+    }
+
 #if defined(QT_MITSHM)
     if ( use_mitshm ) {
 	dptr = (uchar *)xshmimg->data;
@@ -1867,6 +1873,11 @@ QPixmap QPixmap::xForm( const QWMatrix &
 		sptr = (uchar *) axi->data;
 		bpp  = axi->bits_per_pixel;
 		dbytes = dbpl * h;
+                if (dbytes != (long long) dbpl*h) { // Integer overflow detection
+                    QPixmap pm;
+                    pm.data->bitmap = data->bitmap;
+                    return pm;
+                }
 		dptr = (uchar *) malloc(dbytes);
 		Q_CHECK_PTR( dptr );
 		memset(dptr, 0, dbytes);