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 B93E2ECE587 for ; Tue, 1 Oct 2019 16:47:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 852D72168B for ; Tue, 1 Oct 2019 16:47:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569948424; bh=nc5ULy0TFrTcGfOM1GDNpdTbbJKQWQYLHky46hqyIBk=; h=From:To:Cc:Subject:Date:List-ID:From; b=sa9z9hgvp2eagmsmnX5XOxGADXjd9W/m5aY0a0Cy9508Y5S8aJqEncB8k6N5jiwYc ypM5Bca7Cthijrq5HXWk+J88RtMW8qNiv5XBSCElSmRGziYvXGfP7j7ZzBWrRPM4ir KBkgi51wWjyTLw1NDBL9oXnDygScF6oEdjw0W6qo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388403AbfJAQq7 (ORCPT ); Tue, 1 Oct 2019 12:46:59 -0400 Received: from mail.kernel.org ([198.145.29.99]:58132 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390334AbfJAQpf (ORCPT ); Tue, 1 Oct 2019 12:45:35 -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 42AA4205C9; Tue, 1 Oct 2019 16:45:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569948335; bh=nc5ULy0TFrTcGfOM1GDNpdTbbJKQWQYLHky46hqyIBk=; h=From:To:Cc:Subject:Date:From; b=RrKFp3HGKwMAeOeTcQVCvCaWUqb0qA+w6uZs/RFucHh1gMy5TnUcaSyOqL5cS2sfC Tg1LlQgKczfmQAEXviAksVo8OxuE0sZRkQ9R4n+F+5yCY5sGIgx70QykL/uXtS/tuS 00Uy77CwgPyH/bscHxSF1/En3ySD61CDTBgnrEbc= 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 4.4 01/15] ima: always return negative code for error Date: Tue, 1 Oct 2019 12:45:19 -0400 Message-Id: <20191001164533.16915-1-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 a29209fa56746..5c87baaefafb6 100644 --- a/security/integrity/ima/ima_crypto.c +++ b/security/integrity/ima/ima_crypto.c @@ -298,8 +298,11 @@ 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