--- a/libsanitizer/ubsan/ubsan_flags.inc	Thu Oct 25 07:37:49 2018 +0900
+++ b/libsanitizer/ubsan/ubsan_flags.inc	Thu Feb 13 11:34:05 2020 +0900
@@ -1,7 +1,8 @@
 //===-- ubsan_flags.inc -----------------------------------------*- C++ -*-===//
 //
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
@@ -22,3 +23,6 @@
 UBSAN_FLAG(const char *, suppressions, "", "Suppressions file name.")
 UBSAN_FLAG(bool, report_error_type, false,
         "Print specific error type instead of 'undefined-behavior' in summary.")
+UBSAN_FLAG(bool, silence_unsigned_overflow, false,
+        "Do not print non-fatal error reports for unsigned integer overflow. "
+        "Used to provide fuzzing signal without blowing up logs.")