From patchwork Tue Nov 5 13:27:59 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ard Biesheuvel X-Patchwork-Id: 11227777 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 86D032D2C for ; Tue, 5 Nov 2019 13:29:32 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5B7292190F for ; Tue, 5 Nov 2019 13:29:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="XBponVWT"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="LGKA6jzI" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5B7292190F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=8iTwbxSJDvEkENSnZcR4yknTOzflBpZ7E9LhQlpMtHU=; b=XBponVWTwl9Hrc KTUDr8i3YpDaPSgp/1rf9t3PZmJT/oZzSBeKYXTdLhOlxRvujT2dEi2obAYCIlNadLvxyBwo4XuZF umoN5YwKzpY18sa8M/POSrgPfmFboVOPhhxhP24t3o/VJwAPd+79TyjgtzZwtkq41aXBF+6pvjFc8 mcbUD15c6iO3zkHoLWWMWsnSri11PhSAhN+YFq+ejtyZPuVwJST4hMQ/c9xN9SKF6WNwBJ7/+jAna LbcEt0CgOZojQjjlY/tZFKBP1QLDs0fyWOUOyo/eU9KchvnYnNHVoHbtHJT8imjNB62+5ZPBtjvFB hVRikKpKWFOxW8V53fKQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iRytl-0000mU-0I; Tue, 05 Nov 2019 13:29:29 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iRyt1-0000BL-Ha for linux-arm-kernel@lists.infradead.org; Tue, 05 Nov 2019 13:28:44 +0000 Received: from localhost.localdomain (laubervilliers-657-1-83-120.w92-154.abo.wanadoo.fr [92.154.90.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2C1142190F; Tue, 5 Nov 2019 13:28:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1572960523; bh=Nh55X7sYvLj2U2aGXFSuv9DJufS5jhXrUnAVYoR+7lE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LGKA6jzI0/JCyVEE3DeT0DtgGL3Ax03v0vHO1u7dhmWuyhf59QN02FSu+Qd6A/J7q QHpaMTIVQkBwz6htket2Pv04BfuyYQmuTLsGiLZhJ00lcl+Id6oayPA6Xh6XyJ4g6W lV7RtZszytcimf+g1OLSta/T02zJQY7kQY9R7oZ4= From: Ard Biesheuvel To: linux-crypto@vger.kernel.org Subject: [PATCH v3 02/29] crypto: virtio - deal with unsupported input sizes Date: Tue, 5 Nov 2019 14:27:59 +0100 Message-Id: <20191105132826.1838-3-ardb@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191105132826.1838-1-ardb@kernel.org> References: <20191105132826.1838-1-ardb@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191105_052843_615260_0B7736B1 X-CRM114-Status: GOOD ( 12.84 ) X-Spam-Score: -5.2 (-----) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-5.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at https://www.dnswl.org/, high trust [198.145.29.99 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.0 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Herbert Xu , "Michael S. Tsirkin" , Jason Wang , Eric Biggers , Ard Biesheuvel , Gonglei , virtualization@lists.linux-foundation.org, "David S. Miller" , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Return -EINVAL for input sizes that are not a multiple of the AES block size, since they are not supported by our CBC chaining mode. While at it, remove the pr_err() that reports unsupported key sizes being used: we shouldn't spam the kernel log with that. Fixes: dbaf0624ffa5 ("crypto: add virtio-crypto driver") Cc: "Michael S. Tsirkin" Cc: Jason Wang Cc: Gonglei Cc: virtualization@lists.linux-foundation.org Signed-off-by: Ard Biesheuvel --- drivers/crypto/virtio/virtio_crypto_algs.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/crypto/virtio/virtio_crypto_algs.c b/drivers/crypto/virtio/virtio_crypto_algs.c index 65ec10800137..82b316b2f537 100644 --- a/drivers/crypto/virtio/virtio_crypto_algs.c +++ b/drivers/crypto/virtio/virtio_crypto_algs.c @@ -105,8 +105,6 @@ virtio_crypto_alg_validate_key(int key_len, uint32_t *alg) *alg = VIRTIO_CRYPTO_CIPHER_AES_CBC; break; default: - pr_err("virtio_crypto: Unsupported key length: %d\n", - key_len); return -EINVAL; } return 0; @@ -489,6 +487,11 @@ static int virtio_crypto_ablkcipher_encrypt(struct ablkcipher_request *req) /* Use the first data virtqueue as default */ struct data_queue *data_vq = &vcrypto->data_vq[0]; + if (!req->nbytes) + return 0; + if (req->nbytes % AES_BLOCK_SIZE) + return -EINVAL; + vc_req->dataq = data_vq; vc_req->alg_cb = virtio_crypto_dataq_sym_callback; vc_sym_req->ablkcipher_ctx = ctx; @@ -509,6 +512,11 @@ static int virtio_crypto_ablkcipher_decrypt(struct ablkcipher_request *req) /* Use the first data virtqueue as default */ struct data_queue *data_vq = &vcrypto->data_vq[0]; + if (!req->nbytes) + return 0; + if (req->nbytes % AES_BLOCK_SIZE) + return -EINVAL; + vc_req->dataq = data_vq; vc_req->alg_cb = virtio_crypto_dataq_sym_callback; vc_sym_req->ablkcipher_ctx = ctx;