REPORT-103466 导出负载高

fine-itext-old/src/main/java/com/fr/third/com/lowagie/text/pdf/ByteBuffer.java

@@ -189,6 +189,9 @@ public class ByteBuffer extends OutputStream {
      */
     public ByteBuffer append_i(int b) {
         int newcount = count + 1;
+        if (newcount < 0) {
+            throw new OutOfMemoryError();
+        }
         if (newcount > buf.length) {
             byte newbuf[] = new byte[Math.max(Math.min(buf.length, HALF_INTEGER) << 1, newcount)];
             System.arraycopy(buf, 0, newbuf, 0, count);
@@ -212,6 +215,9 @@ public class ByteBuffer extends OutputStream {
         ((off + len) > b.length) || ((off + len) < 0) || len == 0)
             return this;
         int newcount = count + len;
+        if (newcount < 0) {
+            throw new OutOfMemoryError();
+        }
         if (newcount > buf.length) {
             byte newbuf[] = new byte[Math.max(Math.min(buf.length, HALF_INTEGER) << 1, newcount)];
             System.arraycopy(buf, 0, newbuf, 0, count);