Index: exempi-2.2.2/source/XMPFiles/FormatSupport/PSIR_FileWriter.cpp
===================================================================
--- exempi-2.2.2/source/XMPFiles/FormatSupport/PSIR_FileWriter.cpp
+++ exempi-2.2.2/source/XMPFiles/FormatSupport/PSIR_FileWriter.cpp	2018-03-19 09:39:29.606813923 +0100
@@ -291,6 +291,12 @@
 		ioBuf.ptr += paddedLen;	// Move to the data length.
 		XMP_Uns32 dataLen   = GetUns32BE(ioBuf.ptr);
 		XMP_Uns32 dataTotal = ((dataLen + 1) & 0xFFFFFFFEUL);	// Round up to an even total.
+		// See bug https://bugs.freedesktop.org/show_bug.cgi?id=105204
+		// If dataLen is 0xffffffff, then dataTotal might be 0
+		// and therefor make the CheckFileSpace test pass.
+		if (dataTotal < dataLen) {
+			break;
+		}
 		ioBuf.ptr += 4;	// Advance to the resource data.
 
 		XMP_Int64 thisDataPos = ioBuf.filePos + (ioBuf.ptr - ioBuf.data);