X509_GET_PUBKEY(3) return value check in libcrypto

CID 345116

ok beck@ tb@

1 files changed, 3 insertions, 2 deletions

diff --git a/src/lib/libcrypto/x509/x509_vfy.c b/src/lib/libcrypto/x509/x509_vfy.c
index cf92c10299..9a929963f3 100644
--- a/src/lib/libcrypto/x509/x509_vfy.c
+++ b/src/lib/libcrypto/x509/x509_vfy.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: x509_vfy.c,v 1.100 2021/11/26 13:17:09 schwarze Exp $ */
+/* $OpenBSD: x509_vfy.c,v 1.101 2022/01/22 00:36:46 inoguchi Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -2096,7 +2096,8 @@ X509_get_pubkey_parameters(EVP_PKEY *pkey, STACK_OF(X509) *chain)
 
         /* first, populate the other certs */
         for (j = i - 1; j >= 0; j--) {
-                ktmp2 = X509_get0_pubkey(sk_X509_value(chain, j));
+                if ((ktmp2 = X509_get0_pubkey(sk_X509_value(chain, j))) == NULL)
+                        return 0;
                 if (!EVP_PKEY_copy_parameters(ktmp2, ktmp))
                         return 0;
         }