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 D5524ECE58C for ; Tue, 1 Oct 2019 16:54:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A29BB2190F for ; Tue, 1 Oct 2019 16:54:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569948852; bh=yKGquLgQJM6xHAVIyQdIcYLEBg8ctH6tGylCXrJKmP4=; h=From:To:Cc:Subject:Date:List-ID:From; b=MtMokeF+jvEXUs/XIdZZVSYDiQapRnNEtcvwJf7uuk1yuHlBSbEBaz0x86rd3Wsuz PFRMeFsyXGb35fvJ1gWkEULKCcWCd7M9jSc5wAEmho4K+KrsCyctKtbAYWvAno5x45 fvjxXAhjAbZQDnZO9dUKi8BK4F2d9901u3FcWzK4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732517AbfJAQnO (ORCPT ); Tue, 1 Oct 2019 12:43:14 -0400 Received: from mail.kernel.org ([198.145.29.99]:55242 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726109AbfJAQnO (ORCPT ); Tue, 1 Oct 2019 12:43:14 -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 AD9A320B7C; Tue, 1 Oct 2019 16:43:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569948193; bh=yKGquLgQJM6xHAVIyQdIcYLEBg8ctH6tGylCXrJKmP4=; h=From:To:Cc:Subject:Date:From; b=VmdYgCHZrI9gjTnJcvOrjWE/UpMMwBODtzJ3sAQJT40lZP6w9RAomHmaPJN77Nqrh QKoyIFgguRH4oTk9Rhdk4OB2/lJrWNFN36mBHDZaji5WMHucki3VFikGzQtwjHts0M fQjZzkoHkGcgUu1SJnNiD2HYFtBO0LOpW9JuZKH0= 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 4.19 01/43] ima: always return negative code for error Date: Tue, 1 Oct 2019 12:42:29 -0400 Message-Id: <20191001164311.15993-1-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: 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 d9e7728027c6c..b7822d2b79736 100644 --- a/security/integrity/ima/ima_crypto.c +++ b/security/integrity/ima/ima_crypto.c @@ -271,8 +271,11 @@ 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