From 118a46090c50829dc543179019e6140e1235f909 Mon Sep 17 00:00:00 2001
From: Eddie Kohler <ekohler@gmail.com>
Date: Sat, 2 Dec 2017 23:08:51 -0500
Subject: [PATCH] gif_read: Set last_name = NULL unconditionally.

With a non-malicious GIF, last_name is set to NULL when a name
extension is followed by an image. Reported in #117, via
Debian, via a KAIST fuzzing program.
---
 src/gifread.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/gifread.c b/src/gifread.c
index eec4e319..9c287dd5 100644
--- a/src/gifread.c
+++ b/src/gifread.c
@@ -900,6 +900,7 @@ read_gif(Gif_Reader *grr, int read_flags,
   Gif_DeleteArray(gfc.suffix);
   Gif_DeleteArray(gfc.length);
   gfc.gfi = 0;
+  last_name = 0;
 
   if (gfs)
     gfs->errors = gfc.errors[1];