From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 77AB0C433E0 for ; Tue, 16 Jun 2020 15:59:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4F45821532 for ; Tue, 16 Jun 2020 15:59:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592323173; bh=Q9VzjPAFTOrJwsOtNxPwztfgd+T3mqZj6+9goc1O0fw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=iaqNPcQAKd1Z3DRdlI5T3ra7rjbvflMEwSoDTydFLOQ1puE9lF07xOJ+uOv/v2hqv Mt6liQL7WB5Z0Vim0fkFnnmlMGLvb727DZj41LYqVrq6DBOIMEkmEOis1jG7lE4CKt Zo6asUcVzW1gipwR5elNaIHRogR+1wVJNEmZm5rM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732745AbgFPP7b (ORCPT ); Tue, 16 Jun 2020 11:59:31 -0400 Received: from mail.kernel.org ([198.145.29.99]:51968 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732308AbgFPPxi (ORCPT ); Tue, 16 Jun 2020 11:53:38 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 77D55208D5; Tue, 16 Jun 2020 15:53:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592322818; bh=Q9VzjPAFTOrJwsOtNxPwztfgd+T3mqZj6+9goc1O0fw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aAPlqmXVxvIAw44IKmzBAMz1+1/UUd5PHHN+fMKN7zn+7p2vwlyhyX4EJ4sMxXJHn 0uW6IEnDRf4qRfdL94AIHN9rHbN2PvKyTPWAY/f8E/wzOWijZmO5J79GOqaKmTFCMa 46sZ5fIELkclJyfwda3x0yY4KZDprYlpvJbHTpeY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Gonglei , Herbert Xu , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , virtualization@lists.linux-foundation.org, "Longpeng(Mike)" Subject: [PATCH 5.6 098/161] crypto: virtio: Fix dest length calculation in __virtio_crypto_skcipher_do_req() Date: Tue, 16 Jun 2020 17:34:48 +0200 Message-Id: <20200616153111.045388591@linuxfoundation.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200616153106.402291280@linuxfoundation.org> References: <20200616153106.402291280@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Longpeng(Mike) commit d90ca42012db2863a9a30b564a2ace6016594bda upstream. The src/dst length is not aligned with AES_BLOCK_SIZE(which is 16) in some testcases in tcrypto.ko. For example, the src/dst length of one of cts(cbc(aes))'s testcase is 17, the crypto_virtio driver will set @src_data_len=16 but @dst_data_len=17 in this case and get a wrong at then end. SRC: pp pp pp pp pp pp pp pp pp pp pp pp pp pp pp pp pp (17 bytes) EXP: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc pp (17 bytes) DST: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 00 (pollute the last bytes) (pp: plaintext cc:ciphertext) Fix this issue by limit the length of dest buffer. Fixes: dbaf0624ffa5 ("crypto: add virtio-crypto driver") Cc: Gonglei Cc: Herbert Xu Cc: "Michael S. Tsirkin" Cc: Jason Wang Cc: "David S. Miller" Cc: virtualization@lists.linux-foundation.org Cc: linux-kernel@vger.kernel.org Cc: stable@vger.kernel.org Signed-off-by: Longpeng(Mike) Link: https://lore.kernel.org/r/20200602070501.2023-4-longpeng2@huawei.com Signed-off-by: Michael S. Tsirkin Signed-off-by: Greg Kroah-Hartman --- drivers/crypto/virtio/virtio_crypto_algs.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/crypto/virtio/virtio_crypto_algs.c +++ b/drivers/crypto/virtio/virtio_crypto_algs.c @@ -402,6 +402,7 @@ __virtio_crypto_skcipher_do_req(struct v goto free; } + dst_len = min_t(unsigned int, req->cryptlen, dst_len); pr_debug("virtio_crypto: src_len: %u, dst_len: %llu\n", req->cryptlen, dst_len);