From 3395407f083eae362637d7a29e31c97008a57f4f Mon Sep 17 00:00:00 2001
From: Simon Josefsson <simon@josefsson.org>
Date: Wed, 17 Aug 2022 12:25:06 +0200
Subject: [PATCH] lib/libtasn1: Fix ETYPE_OK off by one array size check

Reported by David Trabish in
<https://gitlab.com/gnutls/libtasn1/-/issues/32>.

Signed-off-by: Simon Josefsson <simon@josefsson.org>
---
 grub-core/lib/libtasn1/lib/int.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/grub-core/lib/libtasn1/lib/int.h b/grub-core/lib/libtasn1/lib/int.h
index edfe84a..c15bfa6 100644
--- a/grub-core/lib/libtasn1/lib/int.h
+++ b/grub-core/lib/libtasn1/lib/int.h
@@ -97,7 +97,7 @@ typedef struct tag_and_class_st
 # define ETYPE_TAG(etype) (_asn1_tags[etype].tag)
 # define ETYPE_CLASS(etype) (_asn1_tags[etype].class)
 # define ETYPE_OK(etype) (((etype) != ASN1_ETYPE_INVALID && \
-                          (etype) <= _asn1_tags_size && \
+                          (etype) < _asn1_tags_size && \
                           _asn1_tags[(etype)].desc != NULL)?1:0)
 
 # define ETYPE_IS_STRING(etype) ((etype == ASN1_ETYPE_GENERALSTRING || \
-- 
2.33.0

