This patch comes from: https://github.com/vadz/libtiff/commit/ce6841d9e41d621ba23cf18b190ee6a23b2cc833

Upstream-Status: Backport

Signed-off-by: Baogen shang <baogen.shang@windriver.com>
--- a/tools/gif2tiff.c	2013-12-17 16:46:02.160814995 +0800
+++ b/tools/gif2tiff.c	2013-12-17 16:52:25.140814949 +0800
@@ -406,6 +406,11 @@
         return 0;
     }
     if (oldcode == -1) {
+    if (code >= clear) {
+        fprintf(stderr, "bad input: code=%d is larger than clear=%d\n",code, clear);
+        return 0;
+	}
+
 	*(*fill)++ = suffix[code];
 	firstchar = oldcode = code;
 	return 1;