From patchwork Tue Dec 6 09:29:13 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Gonglei (Arei)" X-Patchwork-Id: 703068 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3tXxlH5MWVz9sdn for ; Tue, 6 Dec 2016 20:53:15 +1100 (AEDT) Received: from localhost ([::1]:47390 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cECQz-0005FO-Lw for incoming@patchwork.ozlabs.org; Tue, 06 Dec 2016 04:53:13 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40240) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cECNa-0002hB-7i for qemu-devel@nongnu.org; Tue, 06 Dec 2016 04:49:43 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cECNX-0006xz-64 for qemu-devel@nongnu.org; Tue, 06 Dec 2016 04:49:42 -0500 Received: from szxga01-in.huawei.com ([58.251.152.64]:6030) by eggs.gnu.org with esmtps (TLS1.0:RSA_ARCFOUR_SHA1:16) (Exim 4.71) (envelope-from ) id 1cECNW-0006lR-N7 for qemu-devel@nongnu.org; Tue, 06 Dec 2016 04:49:39 -0500 Received: from 172.24.1.47 (EHLO szxeml430-hub.china.huawei.com) ([172.24.1.47]) by szxrg01-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id DWD42295; Tue, 06 Dec 2016 17:30:32 +0800 (CST) Received: from localhost (10.177.18.62) by szxeml430-hub.china.huawei.com (10.82.67.185) with Microsoft SMTP Server id 14.3.235.1; Tue, 6 Dec 2016 17:30:23 +0800 From: Gonglei To: Date: Tue, 6 Dec 2016 17:29:13 +0800 Message-ID: <1481016553-69252-1-git-send-email-arei.gonglei@huawei.com> X-Mailer: git-send-email 2.8.2.windows.1 MIME-Version: 1.0 X-Originating-IP: [10.177.18.62] X-CFilter-Loop: Reflected X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.4.x-2.6.x [generic] [fuzzy] X-Received-From: 58.251.152.64 Subject: [Qemu-devel] [PATCH for-2.8] virtio-crypto: zeroize the key material before free X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Gonglei , mst@redhat.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Zeroize the memory of CryptoDevBackendSymOpInfo structure pointed for key material security. Signed-off-by: Gonglei Reviewed-by: Stefan Hajnoczi --- hw/virtio/virtio-crypto.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/hw/virtio/virtio-crypto.c b/hw/virtio/virtio-crypto.c index 2f2467e..ecb19b6 100644 --- a/hw/virtio/virtio-crypto.c +++ b/hw/virtio/virtio-crypto.c @@ -337,7 +337,18 @@ static void virtio_crypto_free_request(VirtIOCryptoReq *req) { if (req) { if (req->flags == CRYPTODEV_BACKEND_ALG_SYM) { - g_free(req->u.sym_op_info); + size_t max_len; + CryptoDevBackendSymOpInfo *op_info = req->u.sym_op_info; + + max_len = op_info->iv_len + + op_info->aad_len + + op_info->src_len + + op_info->dst_len + + op_info->digest_result_len; + + /* Zeroize and free request data structure */ + memset(op_info, 0, sizeof(*op_info) + max_len); + g_free(op_info); } g_free(req); }