Check to ensure row length cannot be greater than data length. Fixes …

…#88.
unidoc · Jul 31, 2017 · 5bc9d83 · 5bc9d83
1 parent 416eb89
commit 5bc9d83
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/pdf/core/encoding.go b/pdf/core/encoding.go
@@ -674,6 +674,10 @@ func (this *LZWEncoder) DecodeStream(streamObj *PdfObjectStream) ([]byte, error)
 			if len(outData)%rowLength != 0 {
 				return nil, fmt.Errorf("Invalid row length (%d/%d)", len(outData), rowLength)
 			}
+			if rowLength > len(outData) {
+				common.Log.Trace("Row length cannot be longer than data length (%d/%d)", rowLength, len(outData))
+				return nil, errors.New("Range check error")
+			}
 
 			pOutBuffer := bytes.NewBuffer(nil)