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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 21D8AECE58A for ; Tue, 1 Oct 2019 16:59:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E4DC62168B for ; Tue, 1 Oct 2019 16:59:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569949143; bh=6vs+mxOj8LdnxQhig/ZrlnZJRypReXhz9Lk/p8RpLM8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Lvvo+UXVH1E4Souc1UkqpiCRRbIA5T5ZA3Vun81cRsmA+DKs7pYunco08DmmUwM91 cy4odkSp3ORNPx6MByIcf6pD9zfLibuKdZzYZwHhx/fIjc3xLB3no+MdBKpn/+7eh8 KyQLj8sLvi1d69p3HfdHwVXJ/3KgPrBTYDfe4YSw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727149AbfJAQ6w (ORCPT ); Tue, 1 Oct 2019 12:58:52 -0400 Received: from mail.kernel.org ([198.145.29.99]:53012 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730941AbfJAQl3 (ORCPT ); Tue, 1 Oct 2019 12:41:29 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (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 D1DB32168B; Tue, 1 Oct 2019 16:41:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569948088; bh=6vs+mxOj8LdnxQhig/ZrlnZJRypReXhz9Lk/p8RpLM8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qbfGs+npIO3cHCmu/sZF3MGlvzQ6LFbAjW91OpFuWCtHHw9jzaaSyORfWmBOp+hKl zcJflDo8YglPt6bCt1Wqfr1XD3DplK171SeRucuM2vYUj3KBr9dKkQz2pckScYTkzm c12DH/4sx3BCTZrdcHaHMeyNk0F/tD5SQD+GOLIQ= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Sascha Hauer , Mimi Zohar , Sasha Levin , linux-integrity@vger.kernel.org, linux-security-module@vger.kernel.org Subject: [PATCH AUTOSEL 5.2 02/63] ima: always return negative code for error Date: Tue, 1 Oct 2019 12:40:24 -0400 Message-Id: <20191001164125.15398-2-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191001164125.15398-1-sashal@kernel.org> References: <20191001164125.15398-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-integrity-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org From: Sascha Hauer [ Upstream commit f5e1040196dbfe14c77ce3dfe3b7b08d2d961e88 ] integrity_kernel_read() returns the number of bytes read. If this is a short read then this positive value is returned from ima_calc_file_hash_atfm(). Currently this is only indirectly called from ima_calc_file_hash() and this function only tests for the return value being zero or nonzero and also doesn't forward the return value. Nevertheless there's no point in returning a positive value as an error, so translate a short read into -EINVAL. Signed-off-by: Sascha Hauer Signed-off-by: Mimi Zohar Signed-off-by: Sasha Levin --- security/integrity/ima/ima_crypto.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/security/integrity/ima/ima_crypto.c b/security/integrity/ima/ima_crypto.c index d4c7b8e1b083d..7532b062be594 100644 --- a/security/integrity/ima/ima_crypto.c +++ b/security/integrity/ima/ima_crypto.c @@ -268,8 +268,11 @@ static int ima_calc_file_hash_atfm(struct file *file, rbuf_len = min_t(loff_t, i_size - offset, rbuf_size[active]); rc = integrity_kernel_read(file, offset, rbuf[active], rbuf_len); - if (rc != rbuf_len) + if (rc != rbuf_len) { + if (rc >= 0) + rc = -EINVAL; goto out3; + } if (rbuf[1] && offset) { /* Using two buffers, and it is not the first -- 2.20.1