From 8b10c845f9ec5730df45c53deb74b1ba187fabd4 Mon Sep 17 00:00:00 2001
From: Nikos Mavrogiannopoulos <nmav@redhat.com>
Date: Wed, 20 Apr 2016 17:09:03 +0200
Subject: decoding: added null pointer check

---
 lib/decoding.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lib/decoding.c b/lib/decoding.c
index e5513a3..ef26f6d 100644
--- a/lib/decoding.c
+++ b/lib/decoding.c
@@ -1361,7 +1361,15 @@ asn1_der_decoding2 (asn1_node *element, const void *ider, int *max_ider_len,
 			{	/* indefinite length method */
 		          p->tmp_ival = -1;
 			}
+
 		      p2 = p->down;
+                      if (p2 == NULL)
+		        {
+		          result = ASN1_DER_ERROR;
+                          warn();
+		          goto cleanup;
+		        }
+
 		      while ((type_field (p2->type) == ASN1_ETYPE_TAG)
 			     || (type_field (p2->type) == ASN1_ETYPE_SIZE))
 			p2 = p2->right;
-- 
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