From c4210673313482edacede58d92e92c213d7a181a Mon Sep 17 00:00:00 2001
From: "Dr. Stephen Henson" <steve@openssl.org>
Date: Tue, 14 Jun 2016 17:44:22 +0100
Subject: [PATCH] Fix omitted selector handling.

The selector field could be omitted because it has a DEFAULT value.
In this case *sfld == NULL (sfld can never be NULL). This was not
noticed because this was never used in existing ASN.1 modules.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 7c46746bf2958fd2eccc59ecb48039e4e20ce38a)
---
 crypto/asn1/tasn_utl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crypto/asn1/tasn_utl.c b/crypto/asn1/tasn_utl.c
index 41726d8feb..e14889feb1 100644
--- a/crypto/asn1/tasn_utl.c
+++ b/crypto/asn1/tasn_utl.c
@@ -234,7 +234,7 @@ const ASN1_TEMPLATE *asn1_do_adb(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt,
     sfld = offset2ptr(*pval, adb->offset);
 
     /* Check if NULL */
-    if (!sfld) {
+    if (*sfld == NULL) {
         if (!adb->null_tt)
             goto err;
         return adb->null_tt;
-- 
2.25.1