Add check for BN functions return value

CID 21665 24835

comment from jsing@ and tb@
ok jsing@ millert@ tb@

diff --git a/lib/libcrypto/bn/bn_print.c b/lib/libcrypto/bn/bn_print.c
index d849b86..9b5c753 100644 (file)
--- a/lib/libcrypto/bn/bn_print.c
+++ b/lib/libcrypto/bn/bn_print.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: bn_print.c,v 1.32 2021/08/31 11:19:19 tb Exp $ */
+/* $OpenBSD: bn_print.c,v 1.33 2022/01/20 10:53:33 inoguchi Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -310,8 +310,10 @@ BN_dec2bn(BIGNUM **bn, const char *a)
                l += *a - '0';
                a++;
                if (++j == BN_DEC_NUM) {
-                       BN_mul_word(ret, BN_DEC_CONV);
-                       BN_add_word(ret, l);
+                       if (!BN_mul_word(ret, BN_DEC_CONV))
+                               goto err;
+                       if (!BN_add_word(ret, l))
+                               goto err;
                        l = 0;
                        j = 0;
                }