add enforce to prevent integer overflow

src/preview.cpp

@@ -415,6 +415,7 @@ DataBuf LoaderNative::getData() const {
 #endif
       return {};
     }
+    Internal::enforce(sizeData >= 28, ErrorCode::kerCorruptedMetadata);
     return {record + sizeHdr + 28, sizeData - 28};
   }
   throw Error(ErrorCode::kerErrorMessage, "Invalid native preview filter: ", nativePreview_.filter_);

test/data/issue_3511_poc.eps

@@ -0,0 +1,13 @@
+%!PS-Adobe-3.0 EPSF-3.0
+%%BoundingBox: 0 0 100 100
+%%EndComments
+%%BeginProlog
+%%EndProlog
+%%Page: 1 1
+%%BeginPageSetup
+%%EndPageSetup
+%BeginPhotoshop: 16
+3842494D040C00000000000441424344
+%EndPhotoshop
+%%PageTrailer
+%%EOF

tests/bugfixes/github/test_issue_3511.py

@@ -0,0 +1,17 @@
+# -*- coding: utf-8 -*-
+
+import system_tests
+
+
+class test_issue_3511_sigma_LoaderNative_getData(metaclass=system_tests.CaseMeta):
+    url = "https://github.com/Exiv2/exiv2/issues/3511"
+
+    filename = "$data_path/issue_3511_poc.eps"
+    commands = ["$exiv2 -pp $filename"]
+    retval = [1]
+    stderr = [
+        """$exiv2_exception_message $filename:
+$kerCorruptedMetadata
+"""
+    ]
+    stdout = [""]

tests/regression_tests/test_regression_allfiles.py

@@ -127,6 +127,7 @@ def get_valid_files(data_dir):
         "poc_1522.jp2",
         "xmpsdk.xmp",
         "crash-23eba73bb01cb01caa96a389eb12955c34b98a37.jpg",
+        "issue_3511_poc.eps",
         # large file that creates 11Mb of output so let's exclude it
         "ReaganLargeTiff.tiff",
         # files that don't create any output