diff --git a/fs/cifsd/smb2pdu.c b/fs/cifsd/smb2pdu.c
index 7549b35bb7926142a6a1be768ca8b2b22b3e24b7..e6cdc3b89d85a84af7f0b47121b4258057046b0f 100644
--- a/fs/cifsd/smb2pdu.c
+++ b/fs/cifsd/smb2pdu.c
@@ -1161,13 +1161,11 @@ static int alloc_preauth_hash(struct ksmbd_session *sess,
 	if (sess->Preauth_HashValue)
 		return 0;
 
-	sess->Preauth_HashValue = kmalloc(PREAUTH_HASHVALUE_SIZE, GFP_KERNEL);
+	sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue,
+			PREAUTH_HASHVALUE_SIZE, GFP_KERNEL);
 	if (!sess->Preauth_HashValue)
 		return -ENOMEM;
 
-	memcpy(sess->Preauth_HashValue,
-	       conn->preauth_info->Preauth_HashValue,
-	       PREAUTH_HASHVALUE_SIZE);
 	return 0;
 }