PKCS7_signatureVerify(): add missing free after EVP_VerifyUpdate()

From Nils Dossche

1 files changed, 4 insertions, 2 deletions

diff --git a/src/lib/libcrypto/pkcs7/pk7_doit.c b/src/lib/libcrypto/pkcs7/pk7_doit.c
index e1c075f15a..291a7316f6 100644
--- a/src/lib/libcrypto/pkcs7/pk7_doit.c
+++ b/src/lib/libcrypto/pkcs7/pk7_doit.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: pk7_doit.c,v 1.57 2024/11/30 10:01:31 tb Exp $ */
+/* $OpenBSD: pk7_doit.c,v 1.58 2025/03/18 12:48:11 tb Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -1067,8 +1067,10 @@ PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si, X509 *x509)
                         ret = -1;
                         goto err;
                 }
-                if (!EVP_VerifyUpdate(&mdc_tmp, abuf, alen))
+                if (!EVP_VerifyUpdate(&mdc_tmp, abuf, alen)) {
+                        free(abuf);
                         goto err;
+                }
 
                 free(abuf);
         }