Add missing BN_CTX_end() calls.

After calling BN_CTX_start(), there must be a BN_CTX_end() before
returning.  There were missing BN_CTX_end() calls in error paths.  One diff
chunk was simply removing redundant code related to this.

ok deraadt@

1 files changed, 4 insertions, 2 deletions

diff --git a/src/lib/libcrypto/bn/bn_recp.c b/src/lib/libcrypto/bn/bn_recp.c
index 7b31fe0adf..b0bd0aa4df 100644
--- a/src/lib/libcrypto/bn/bn_recp.c
+++ b/src/lib/libcrypto/bn/bn_recp.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: bn_recp.c,v 1.12 2015/03/21 08:05:20 doug Exp $ */
+/* $OpenBSD: bn_recp.c,v 1.13 2015/04/29 00:11:12 doug Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -161,8 +161,10 @@ BN_div_recp(BIGNUM *dv, BIGNUM *rem, const BIGNUM *m, BN_RECP_CTX *recp,
 
         if (BN_ucmp(m, &(recp->N)) < 0) {
                 BN_zero(d);
-                if (!BN_copy(r, m))
+                if (!BN_copy(r, m)) {
+                        BN_CTX_end(ctx);
                         return 0;
+                }
                 BN_CTX_end(ctx);
                 return (1);
         }