diff -urNp old/plug-ins/common/file-psp.c new/plug-ins/common/file-psp.c

--- old/plug-ins/common/file-psp.c	2018-01-04 11:58:46.928253797 +0100

+++ new/plug-ins/common/file-psp.c	2018-01-04 12:03:42.141874067 +0100

@@ -913,6 +913,12 @@ read_creator_block (FILE     *f,

               g_message ("Error reading creator keyword data");

               return -1;

             }

+          if (string[length - 1] != '\0')

+            {

+              g_message ("Creator keyword data not nul-terminated");

+              g_free (string);

+              return -1;

+            }

           switch (keyword)

             {

             case PSP_CRTR_FLD_CRT_DATE: