Fix several crash causing defects from OpenSSL.

These include:
CVE-2015-0209 - Use After Free following d2i_ECPrivatekey error
CVE-2015-0286 - Segmentation fault in ASN1_TYPE_cmp
CVE-2015-0287 - ASN.1 structure reuse memory corruption
CVE-2015-0289 - PKCS7 NULL pointer dereferences

Several other issues did not apply or were already fixed.
Refer to https://www.openssl.org/news/secadv_20150319.txt

joint work with beck, doug, guenther, jsing, miod

1 files changed, 2 insertions, 2 deletions

diff --git a/src/lib/libcrypto/asn1/a_set.c b/src/lib/libcrypto/asn1/a_set.c
index ba4f28be34..63d55c3714 100644
--- a/src/lib/libcrypto/asn1/a_set.c
+++ b/src/lib/libcrypto/asn1/a_set.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: a_set.c,v 1.16 2014/07/11 08:44:47 jsing Exp $ */
+/* $OpenBSD: a_set.c,v 1.17 2015/03/19 14:00:22 tedu Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -225,7 +225,7 @@ d2i_ASN1_SET(STACK_OF(OPENSSL_BLOCK) **a, const unsigned char **pp, long length,
         return ret;
 
 err:
-        if (ret != NULL && (a == NULL || *a != ret)) {
+        if (a == NULL || *a != ret) {
                 if (free_func != NULL)
                         sk_OPENSSL_BLOCK_pop_free(ret, free_func);
                 else