Credit to OSS-Fuzz: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=51751

Credit to OSS-Fuzz: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=52053
Avoid null pointer deref and heap buffer overflow.

tests/bugfixes/github/test_issue_2376.py

@@ -0,0 +1,13 @@
+# -*- coding: utf-8 -*-
+
+from system_tests import CaseMeta, check_no_ASAN_UBSAN_errors
+
+class issue_2376_QuickTimeVideo_userDataDecoder_null_deref(metaclass=CaseMeta):
+    url      = "https://github.com/Exiv2/exiv2/issues/2376"
+    filename = "$data_path/issue_2376_poc.mp4"
+    commands = ["$exiv2 $filename"]
+    retval   = [1]
+    stderr   = ["""$exiv2_exception_message $filename:
+$kerCorruptedMetadata
+"""]
+    stdout   = [""]