From a71bb64fe959c0fe891de5cec99bb6ca44172818 Mon Sep 17 00:00:00 2001
From: Kevin Backhouse <kevinbackhouse@github.com>
Date: Wed, 22 Sep 2021 23:55:15 +0100
Subject: [PATCH] Credit to OSS-Fuzz:
 https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=39060 Fix UBSAN failure
 caused by left shift of a negative number.

---
 src/pentaxmn_int.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/pentaxmn_int.cpp b/src/pentaxmn_int.cpp
index f4cb3863..32d6f305 100644
--- a/src/pentaxmn_int.cpp
+++ b/src/pentaxmn_int.cpp
@@ -1036,7 +1036,7 @@ namespace Exiv2 {
     std::ostream& PentaxMakerNote::printDate(std::ostream& os, const Value& value, const ExifData*)
     {
         /* I choose same format as is used inside EXIF itself */
-        os << ((value.toLong(0) << 8) + value.toLong(1));
+        os << ((static_cast<uint64_t>(value.toLong(0)) << 8) + value.toLong(1));
         os << ":";
         os << std::setw(2) << std::setfill('0') << value.toLong(2);
         os << ":";