2 files changed, 9 insertions, 0 deletions
diff --git a/Build/source/texk/dviout-util/ChangeLog b/Build/source/texk/dviout-util/ChangeLog
index 6a655abf6ac..9bbc045a6c6 100644
--- a/Build/source/texk/dviout-util/ChangeLog
+++ b/Build/source/texk/dviout-util/ChangeLog
@@ -1,3 +1,7 @@
+2019-02-25  Hironobu Yamashita  <h.y.acetaminophen@gmail.com>
+
+	* chkdvifont.c: Forbid too long file name.
+
 2019-02-06  Hironobu Yamashita  <h.y.acetaminophen@gmail.com>
 
 	* chkdvifont.c: Detect new JFM spec.
diff --git a/Build/source/texk/dviout-util/chkdvifont.c b/Build/source/texk/dviout-util/chkdvifont.c
index 103285dda10..42515bb1d6b 100644
--- a/Build/source/texk/dviout-util/chkdvifont.c
+++ b/Build/source/texk/dviout-util/chkdvifont.c
@@ -320,6 +320,11 @@ int main(int argc, char **argv)
         }
     }
 
+    if(strlen(argv[argc-1]) >= MAXPATH) {
+        fprintf(stderr, "Too long filename\n");
+        exit(255);
+    }
+
     /* check file extension */
     if (!f_t){
         pt = argv[argc-1];