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=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 8170FC3A5A0 for ; Mon, 19 Aug 2019 14:24:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5475B20651 for ; Mon, 19 Aug 2019 14:24:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="CIAwk/2x" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726842AbfHSOYJ (ORCPT ); Mon, 19 Aug 2019 10:24:09 -0400 Received: from mail-wm1-f65.google.com ([209.85.128.65]:38208 "EHLO mail-wm1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726186AbfHSOYJ (ORCPT ); Mon, 19 Aug 2019 10:24:09 -0400 Received: by mail-wm1-f65.google.com with SMTP id m125so1780951wmm.3 for ; Mon, 19 Aug 2019 07:24:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=okCdUHYHWt8s+0k5Gl5UgSWbhxR2JAmRuhLJNchPGYI=; b=CIAwk/2xz5Fk3vpsS5zaUx5blmwut8crvHyNuE1nZV7u49BJOzwxN+pcuH007DJF9X MnH1y5G9MnyJE+DGRdBqswFOhlHsVdGgGFwDWtdmNU3GQWQZBt5hnymnkWsyx9FNt8iJ BNSyrC3Nh6tjtztCCQjW9y3BMd4BRKWGaulhagaIJqq/BpRRW/pSDdebDXS1763t14Ma o3mMv55QwC9jySRQf/uLrIuZmFrm2nWOMAzlwfmIGF4wWfCZikKrlvD0KcC7vJfuXDZB +UCNpavKC4HW5TLPWRwEjG4AkY/vyRYAzwfZqVeIou7qYmOuzvfUJo8u2h8iTlx1IMsT 72zw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=okCdUHYHWt8s+0k5Gl5UgSWbhxR2JAmRuhLJNchPGYI=; b=k1CSEEPpIWrXmnAMAhajHSf2MoIHHnUXWU++Xn1JWAxGF/kt/ori+ATgeai3NbQy2T Sm4ZfnxddtH8qT3KX3X6W7s7D3VSrvJYiulS+yEPjWxyi//JEWn1Xuhrx3Wb8g0DKXwj TnY5LQ5k76KT0Nga+v0rnzx/vn/1OBIkIsIWfxveCOsMyqFiMRttKoxDV/STUtpqtFgq tlIpIW24Haf25QzRUJwi1zrQBUDSzbmPtWu8NJUr/Z31tmRMy/2GfBzLbZ0CUniWsxIF 32JDGFtZXDzyWgExOJ9VOPzxkixf+x3tRAR+F/ditOLY8Gmpq9FBzXgVQ4qqpe2DnVk/ vDzA== X-Gm-Message-State: APjAAAVDF/pL+/bBx6qSD/Uae7NKpg2NnUe8FE9Pu3J9jBkqVDE3Zqto +6G7t1yScb1PHWdkKF7F6jnbVv8SGYY4hg== X-Google-Smtp-Source: APXvYqzLJ657/WQvIhrtl+/1INZDJrbRbFhnGrWe3DRgCNYGkxPq1v84s8c8ACnaplqfEsLwbpG2ww== X-Received: by 2002:a1c:1a87:: with SMTP id a129mr20621847wma.21.1566224647192; Mon, 19 Aug 2019 07:24:07 -0700 (PDT) Received: from localhost.localdomain (11.172.185.81.rev.sfr.net. [81.185.172.11]) by smtp.gmail.com with ESMTPSA id o17sm13643356wrx.60.2019.08.19.07.22.27 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 19 Aug 2019 07:24:06 -0700 (PDT) From: Ard Biesheuvel To: linux-crypto@vger.kernel.org Cc: herbert@gondor.apana.org.au, Ard Biesheuvel , Krzysztof Kozlowski , Vladimir Zapolskiy , Kamil Konieczny , linux-samsung-soc@vger.kernel.org Subject: [PATCH 1/2] crypto: s5p - deal gracefully with bogus input sizes Date: Mon, 19 Aug 2019 17:22:25 +0300 Message-Id: <20190819142226.1703-2-ard.biesheuvel@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190819142226.1703-1-ard.biesheuvel@linaro.org> References: <20190819142226.1703-1-ard.biesheuvel@linaro.org> Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org The s5p skcipher driver returns -EINVAL for zero length inputs, which deviates from the behavior of the generic ECB template, and causes fuzz tests to fail. In cases where the input is not a multiple of the AES block size (and the chaining mode is not CTR), it prints an error to the kernel log, which is a thing we usually try to avoid in response to situations that can be triggered by unprivileged users. Signed-off-by: Ard Biesheuvel --- drivers/crypto/s5p-sss.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/crypto/s5p-sss.c b/drivers/crypto/s5p-sss.c index 9ef25230c199..ef90c58edb1f 100644 --- a/drivers/crypto/s5p-sss.c +++ b/drivers/crypto/s5p-sss.c @@ -2056,9 +2056,12 @@ static int s5p_aes_crypt(struct ablkcipher_request *req, unsigned long mode) struct s5p_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm); struct s5p_aes_dev *dev = ctx->dev; + if (!req->nbytes) + return 0; + if (!IS_ALIGNED(req->nbytes, AES_BLOCK_SIZE) && ((mode & FLAGS_AES_MODE_MASK) != FLAGS_AES_CTR)) { - dev_err(dev->dev, "request size is not exact amount of AES blocks\n"); + dev_dbg(dev->dev, "request size is not exact amount of AES blocks\n"); return -EINVAL; } -- 2.17.1