From patchwork Fri Apr 15 06:41:35 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: zhenwei pi X-Patchwork-Id: 12814623 X-Patchwork-Delegate: herbert@gondor.apana.org.au 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 EA4C9C433F5 for ; Fri, 15 Apr 2022 06:45:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350691AbiDOGsJ (ORCPT ); Fri, 15 Apr 2022 02:48:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59692 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343934AbiDOGsH (ORCPT ); Fri, 15 Apr 2022 02:48:07 -0400 Received: from mail-pj1-x102e.google.com (mail-pj1-x102e.google.com [IPv6:2607:f8b0:4864:20::102e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A3945B0D0D for ; Thu, 14 Apr 2022 23:45:28 -0700 (PDT) Received: by mail-pj1-x102e.google.com with SMTP id ll10so6979546pjb.5 for ; Thu, 14 Apr 2022 23:45:28 -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=eUPRo1W7HXTqRUmuszkjpWErgWaPyulrOyER93ew8mA=; b=2okK/vk4qQTljwBk1QYv8jssjKnLC1JWY6AXCN8hrTti/FJJ9mD+eNzxXeBbs+jshV AWEUMm0LmqJSBH/7058T7s6qFIKwViTM9mC5t3WNsTLJD21HO2MayRpqye5vrVeHx2Fk p1KyRNx72f3Lx/Q8nz+f2wJsYzFgsckeQXIMFOAZ+Pgb2CGZwskKTyUucasgjjisAtA7 nxrk5PcUU0vN7wVsPu9vyZaarfvQO1dgcjhd5A3mxbr//0sV6vCZjwfbj/DzB7p7cbfN OH7l0ZGqqMf/TwdXfQKp8ots3JjEDr07bevn8Yh4I5I+nielXDSLVPOXLwupIMlP/RZ0 9TQQ== 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=eUPRo1W7HXTqRUmuszkjpWErgWaPyulrOyER93ew8mA=; b=AR8eLSyB06ypPGkDT7cfH0NQmGN4+6Q4KTvlJCC+husD+Fn4fZVwXtDOwIFSnLczxe IRlf0Sx2QUMt8w/fXKwfBRr8H30JhkF/q5kTXsqQl9F/+tzVJiuxwnWPpKriMWAJ6SCh J6gA7HAJCid6SuN8XzgUBWtsVSUSxEbrTnwZ8plrSMSMXOJHTlrBUMPCOlDYinFFPa/8 S01t9QDbsI01cYJvFOCcrj+LyJSZWy0tqwF8+srZL1KBqMolj2/X4FZtwBegsP91Nhq7 BJM+9zexNKuqIEBK36goZK1YbrvGJDutQIaveZgwQRTbA0GH59OuKF6Ck25GV1CjMoSF fsBQ== X-Gm-Message-State: AOAM531C1//a3yzDr3DzZzZgbLN2m6KI13utWMYgtT93vZgsAI990biF RKvnftYE35ehEQ7m/TZP1r/VWA== X-Google-Smtp-Source: ABdhPJxcShAeTRpf1TUgLEfubOBQZZ90/nwfksxqrBB43jrycMr1mv1lYJHhKntT+PHRDW956nfgSA== X-Received: by 2002:a17:902:b10f:b0:156:612f:318d with SMTP id q15-20020a170902b10f00b00156612f318dmr50126545plr.143.1650005128147; Thu, 14 Apr 2022 23:45:28 -0700 (PDT) Received: from always-x1.bytedance.net ([61.120.150.70]) by smtp.gmail.com with ESMTPSA id d8-20020a056a00198800b004fab740dbe6sm1867385pfl.15.2022.04.14.23.45.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 14 Apr 2022 23:45:27 -0700 (PDT) From: zhenwei pi To: arei.gonglei@huawei.com, mst@redhat.com Cc: jasowang@redhat.com, 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, lei he , zhenwei pi Subject: [PATCH 3/4] virtio-crypto: adjust dst_len at ops callback Date: Fri, 15 Apr 2022 14:41:35 +0800 Message-Id: <20220415064136.304661-4-pizhenwei@bytedance.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220415064136.304661-1-pizhenwei@bytedance.com> References: <20220415064136.304661-1-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. 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 bf7c1aa4be37..7cd932c2d9ee 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); }