Don't allow zero width/height in WebPImage::inject_VP8X

tests/bugfixes/github/test_issue_2270.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+
+from system_tests import CaseMeta, CopyTmpFiles, path
+@CopyTmpFiles("$data_path/issue_2270_poc.webp")
+
+class WebPImage_inject_VP8X_integer_overflow(metaclass=CaseMeta):
+    """
+    Regression test for the bug described in:
+    https://github.com/Exiv2/exiv2/issues/2270
+    """
+    url = "https://github.com/Exiv2/exiv2/issues/2270"
+
+    filename = path("$tmp_path/issue_2270_poc.webp")
+    commands = ["$exiv2 rm $filename"]
+    stdout = [""]
+    stderr = [
+        """$exception_in_erase """ + filename + """:
+$kerCorruptedMetadata
+"""]
+    retval = [1]