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=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,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 6C8A1C433FF for ; Wed, 14 Aug 2019 17:20:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3B738208C2 for ; Wed, 14 Aug 2019 17:20:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1565803237; bh=wGnkXI/H79nU+O0BqQv0kJhREjEJ1fz8u7j98i5eA+0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=WC8WLXuVcGYycPAv6xQ9TSN3grhba+UZZFMaWU53znUFPzW1uBCq3NCtZ721CfzrD Fz4uoFRQkzFY96MlJiyIGm7wRRe/b9oajaDzdJFwadXIwj0np81G0ojgLZVXOJyA/K ElfKW2HIGH8pA4iF9n9BPOXexEcN526Y8/8zFuJE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730515AbfHNRUg (ORCPT ); Wed, 14 Aug 2019 13:20:36 -0400 Received: from mail.kernel.org ([198.145.29.99]:33604 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730496AbfHNRKj (ORCPT ); Wed, 14 Aug 2019 13:10:39 -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 652E02084D; Wed, 14 Aug 2019 17:10:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1565802638; bh=wGnkXI/H79nU+O0BqQv0kJhREjEJ1fz8u7j98i5eA+0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mQ9KieIVVnDnsBc6rlWTW1K1zRlB8XzyW+0Acv+IbaQhD8GC1AwnZI1bJT7mcGJxg LzWBjsK1Zwy9zsGmcFyrzJi7c/RUXNmz42zBjGLVhRoZD9KyodDAc05iQmYlZsneXT nYYwMFeBRnagyyxZ28MSsvENaXhP7NuNvyb3VPzM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hanjun Guo , Dan Carpenter , Lorenzo Pieralisi , Will Deacon , Sudeep Holla , Catalin Marinas , Robin Murphy , Sasha Levin Subject: [PATCH 4.19 59/91] ACPI/IORT: Fix off-by-one check in iort_dev_find_its_id() Date: Wed, 14 Aug 2019 19:01:22 +0200 Message-Id: <20190814165752.092367336@linuxfoundation.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190814165748.991235624@linuxfoundation.org> References: <20190814165748.991235624@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 [ Upstream commit 5a46d3f71d5e5a9f82eabc682f996f1281705ac7 ] Static analysis identified that index comparison against ITS entries in iort_dev_find_its_id() is off by one. Update the comparison condition and clarify the resulting error message. Fixes: 4bf2efd26d76 ("ACPI: Add new IORT functions to support MSI domain handling") Link: https://lore.kernel.org/linux-arm-kernel/20190613065410.GB16334@mwanda/ Reviewed-by: Hanjun Guo Reported-by: Dan Carpenter Signed-off-by: Lorenzo Pieralisi Cc: Dan Carpenter Cc: Will Deacon Cc: Hanjun Guo Cc: Sudeep Holla Cc: Catalin Marinas Cc: Robin Murphy Signed-off-by: Will Deacon Signed-off-by: Sasha Levin --- drivers/acpi/arm64/iort.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c index 43c2615434b48..e11b5da6f828f 100644 --- a/drivers/acpi/arm64/iort.c +++ b/drivers/acpi/arm64/iort.c @@ -616,8 +616,8 @@ static int iort_dev_find_its_id(struct device *dev, u32 req_id, /* Move to ITS specific data */ its = (struct acpi_iort_its_group *)node->node_data; - if (idx > its->its_count) { - dev_err(dev, "requested ITS ID index [%d] is greater than available [%d]\n", + if (idx >= its->its_count) { + dev_err(dev, "requested ITS ID index [%d] overruns ITS entries [%d]\n", idx, its->its_count); return -ENXIO; } -- 2.20.1