1 files changed, 5 insertions, 3 deletions

diff --git a/src/lib/libcrypto/bn/bn_mul.c b/src/lib/libcrypto/bn/bn_mul.c
index 5e270b988f..3a33767a93 100644
--- a/src/lib/libcrypto/bn/bn_mul.c
+++ b/src/lib/libcrypto/bn/bn_mul.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: bn_mul.c,v 1.34 2023/02/22 05:57:19 jsing Exp $ */
+/* $OpenBSD: bn_mul.c,v 1.35 2023/03/27 10:22:47 tb Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -786,8 +786,10 @@ BN_mul(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
 
         BN_set_negative(rr, a->neg ^ b->neg);
 
-        if (r != rr)
-                BN_copy(r, rr);
+        if (r != rr) {
+                if (!bn_copy(r, rr))
+                        goto err;
+        }
  done:
         ret = 1;
  err: