From patchwork Sun Apr 24 10:41:39 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: zhenwei pi X-Patchwork-Id: 565798 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2150BC433EF for ; Sun, 24 Apr 2022 10:46:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239139AbiDXKtF (ORCPT ); Sun, 24 Apr 2022 06:49:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56616 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239104AbiDXKtC (ORCPT ); Sun, 24 Apr 2022 06:49:02 -0400 Received: from mail-pf1-x435.google.com (mail-pf1-x435.google.com [IPv6:2607:f8b0:4864:20::435]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AA36F24956 for ; Sun, 24 Apr 2022 03:45:54 -0700 (PDT) Received: by mail-pf1-x435.google.com with SMTP id a15so12239673pfv.11 for ; Sun, 24 Apr 2022 03:45:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=px4I+RzeTWMMtdZKLYUD3e7jp1xURuzvNJsO7o4S7ms=; b=FGf98dBpvjagNdKAx1gz/khVHlDbxcMtXIymcpOlEQTvZ7bDLmKT4Am04RCOVey8Vt ieGah75ezFTyLKCImJc/u1A+PEJXMcGbrz5onNQN0C9vxShlPewcKN/5Ryd1YXtSvtIa NbsMhtvFrK6Pb855hBBaau4Z+Pwtyom6hj4VMqBa7wWsKrEEc4mw+ACkPzUoN5nGN8aR HIG/MNh++NR7fj1uegbKiu5GlAsttsouG6C0RMx8eb9QqW6Zm3lFD010+iPRoOIkDRZZ v8LTF+Q1IkD4In2BRjHr/E3Kqm1MOKQiJTTwbuuwjoBldmWmgQMOYfVCoWcTvPyzq/Bo vvrg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=px4I+RzeTWMMtdZKLYUD3e7jp1xURuzvNJsO7o4S7ms=; b=Fql9ERO9Rt8opi+cCjsu3A4aHrasEerodqI4q4/pg59adRfSdw1nl5W0xu6PMmQ99e zzWgq5XDuyBFZPl26LZlzkRfKXKYRcJGl6Z8BpUTO1x46YqaOossV1usoryZiBI9h/Rx h7UWsXEdpaLq+jCEBf2P51Thv0qTToc26wBb/GTrC4/pPrr3XltqSTFYvq4gV2ZIyudW kjaanIe8M1ivE5iw/NIl4JVDkbITpV5cFUTRmUAgC9HqKvuWaA/ddJ33nkAhzLV6IzIu RyL9we5HCOYD8vr/bErIpF2EWcEbfJOtpWT7A5N30xaHxc9c+zihrxlar/xEgs9vsQ3C NVww== X-Gm-Message-State: AOAM531cUgeVi/Tyx5WU44W1XI7lLmNYZHVi8dayslxdz3w+bjfLCQ7u EeYqoqj0Ut1Rx5jDFZ5Z6V/vyg== X-Google-Smtp-Source: ABdhPJwJx/jeBsrcyfzqw3BwOB5hWkRSrCnP2UooawE0svZYmbsKlXo42bKGvoqpZSZOVMWjI3ks0w== X-Received: by 2002:aa7:9041:0:b0:4fe:3d6c:1739 with SMTP id n1-20020aa79041000000b004fe3d6c1739mr13689501pfo.13.1650797154126; Sun, 24 Apr 2022 03:45:54 -0700 (PDT) Received: from always-x1.bytedance.net ([61.120.150.70]) by smtp.gmail.com with ESMTPSA id y2-20020a056a00190200b004fa865d1fd3sm8287295pfi.86.2022.04.24.03.45.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 24 Apr 2022 03:45:53 -0700 (PDT) From: zhenwei pi To: arei.gonglei@huawei.com, mst@redhat.com, jasowang@redhat.com Cc: herbert@gondor.apana.org.au, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-crypto@vger.kernel.org, helei.sig11@bytedance.com, davem@davemloft.net, zhenwei pi Subject: [PATCH v4 4/5] virtio-crypto: adjust dst_len at ops callback Date: Sun, 24 Apr 2022 18:41:39 +0800 Message-Id: <20220424104140.44841-5-pizhenwei@bytedance.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220424104140.44841-1-pizhenwei@bytedance.com> References: <20220424104140.44841-1-pizhenwei@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org From: lei he For some akcipher operations(eg, decryption of pkcs1pad(rsa)), the length of returned result maybe less than akcipher_req->dst_len, we need to recalculate the actual dst_len through the virt-queue protocol. Cc: Michael S. Tsirkin Cc: Jason Wang Cc: Gonglei Signed-off-by: lei he Signed-off-by: zhenwei pi --- drivers/crypto/virtio/virtio_crypto_akcipher_algs.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c b/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c index 1e98502830cf..1892901d2a71 100644 --- a/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c +++ b/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c @@ -90,9 +90,12 @@ static void virtio_crypto_dataq_akcipher_callback(struct virtio_crypto_request * } akcipher_req = vc_akcipher_req->akcipher_req; - if (vc_akcipher_req->opcode != VIRTIO_CRYPTO_AKCIPHER_VERIFY) + if (vc_akcipher_req->opcode != VIRTIO_CRYPTO_AKCIPHER_VERIFY) { + /* actuall length maybe less than dst buffer */ + akcipher_req->dst_len = len - sizeof(vc_req->status); sg_copy_from_buffer(akcipher_req->dst, sg_nents(akcipher_req->dst), vc_akcipher_req->dst_buf, akcipher_req->dst_len); + } virtio_crypto_akcipher_finalize_req(vc_akcipher_req, akcipher_req, error); }